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-rw-r--r--progs/demos/.gitignore7
-rw-r--r--progs/demos/Makefile8
-rw-r--r--progs/demos/SConscript10
-rw-r--r--progs/demos/dinoshade.c914
-rw-r--r--progs/demos/fbotexture.c621
-rw-r--r--progs/demos/glslnoise.c201
-rw-r--r--progs/demos/glutfx.c189
-rw-r--r--progs/demos/ipers.c18
-rw-r--r--progs/demos/occlude.c234
-rw-r--r--progs/demos/projtex.c1028
-rw-r--r--progs/demos/readpix.c67
-rw-r--r--progs/demos/shadowtex.c2
-rw-r--r--progs/demos/streaming_rect.c327
-rw-r--r--progs/demos/teapot.c11
-rw-r--r--progs/demos/texdown.c477
-rw-r--r--progs/demos/texobj.c284
-rw-r--r--progs/demos/tunnel.c9
-rw-r--r--progs/demos/tunnel2.c9
-rw-r--r--progs/demos/vao_demo.c2
19 files changed, 2687 insertions, 1731 deletions
diff --git a/progs/demos/.gitignore b/progs/demos/.gitignore
index d59d175212..f3c7091bcc 100644
--- a/progs/demos/.gitignore
+++ b/progs/demos/.gitignore
@@ -5,10 +5,12 @@ bounce
clearspd
copypix
cubemap
+dinoshade
drawpix
engine
extfuncs.h
fbo_firecube
+fbotexture
fire
fogcoord
fplight
@@ -27,11 +29,9 @@ isosurf
lodbias
morph3d
multiarb
-occlude
-osdemo
paltex
-pixeltex
pointblast
+projtex
rain
ray
readpix
@@ -61,4 +61,5 @@ trispd
tunnel
tunnel2
vao_demo
+Windows
winpos
diff --git a/progs/demos/Makefile b/progs/demos/Makefile
index 32c6072123..c17595ec79 100644
--- a/progs/demos/Makefile
+++ b/progs/demos/Makefile
@@ -19,9 +19,11 @@ PROGS = \
clearspd \
copypix \
cubemap \
+ dinoshade \
drawpix \
engine \
fbo_firecube \
+ fbotexture \
fire \
fogcoord \
fplight \
@@ -32,9 +34,7 @@ PROGS = \
geartrain \
glinfo \
gloss \
- glslnoise \
gltestperf \
- glutfx \
isosurf \
ipers \
lodbias \
@@ -42,6 +42,7 @@ PROGS = \
multiarb \
paltex \
pointblast \
+ projtex \
rain \
ray \
readpix \
@@ -49,7 +50,6 @@ PROGS = \
renormal \
shadowtex \
singlebuffer \
- streaming_rect \
spectex \
spriteblast \
stex3d \
@@ -57,9 +57,7 @@ PROGS = \
terrain \
tessdemo \
texcyl \
- texdown \
texenv \
- texobj \
textures \
trispd \
tunnel \
diff --git a/progs/demos/SConscript b/progs/demos/SConscript
index bc166dd789..f851870bcf 100644
--- a/progs/demos/SConscript
+++ b/progs/demos/SConscript
@@ -39,11 +39,9 @@ progs = [
'geartrain',
'glinfo',
'gloss',
- 'glslnoise',
'gltestperf',
- 'glutfx',
- 'isosurf',
'ipers',
+ 'isosurf',
'lodbias',
'morph3d',
'multiarb',
@@ -55,7 +53,6 @@ progs = [
'renormal',
'shadowtex',
'singlebuffer',
- 'streaming_rect',
'spectex',
'spriteblast',
'stex3d',
@@ -63,15 +60,16 @@ progs = [
'terrain',
'tessdemo',
'texcyl',
- 'texdown',
'texenv',
- 'texobj',
'textures',
'trispd',
'tunnel',
'tunnel2',
'vao_demo',
'winpos',
+ 'dinoshade',
+ 'fbotexture',
+ 'projtex',
]
for prog in progs:
diff --git a/progs/demos/dinoshade.c b/progs/demos/dinoshade.c
new file mode 100644
index 0000000000..cbf8751e25
--- /dev/null
+++ b/progs/demos/dinoshade.c
@@ -0,0 +1,914 @@
+
+/* Copyright (c) Mark J. Kilgard, 1994, 1997. */
+
+/* This program is freely distributable without licensing fees
+ and is provided without guarantee or warrantee expressed or
+ implied. This program is -not- in the public domain. */
+
+/* Example for PC game developers to show how to *combine* texturing,
+ reflections, and projected shadows all in real-time with OpenGL.
+ Robust reflections use stenciling. Robust projected shadows
+ use both stenciling and polygon offset. PC game programmers
+ should realize that neither stenciling nor polygon offset are
+ supported by Direct3D, so these real-time rendering algorithms
+ are only really viable with OpenGL.
+
+ The program has modes for disabling the stenciling and polygon
+ offset uses. It is worth running this example with these features
+ toggled off so you can see the sort of artifacts that result.
+
+ Notice that the floor texturing, reflections, and shadowing
+ all co-exist properly. */
+
+/* When you run this program: Left mouse button controls the
+ view. Middle mouse button controls light position (left &
+ right rotates light around dino; up & down moves light
+ position up and down). Right mouse button pops up menu. */
+
+/* Check out the comments in the "redraw" routine to see how the
+ reflection blending and surface stenciling is done. You can
+ also see in "redraw" how the projected shadows are rendered,
+ including the use of stenciling and polygon offset. */
+
+/* This program is derived from glutdino.c */
+
+/* Compile: cc -o dinoshade dinoshade.c -lglut -lGLU -lGL -lXmu -lXext -lX11 -lm */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h> /* for cos(), sin(), and sqrt() */
+#include <stddef.h> /* for ptrdiff_t, referenced by GL.h when GL_GLEXT_LEGACY defined */
+#ifdef _WIN32
+#include <windows.h>
+#endif
+#define GL_GLEXT_LEGACY
+#include <GL/glew.h> /* OpenGL Utility Toolkit header */
+#include <GL/glut.h> /* OpenGL Utility Toolkit header */
+
+/* Some <math.h> files do not define M_PI... */
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+/* Variable controlling various rendering modes. */
+static int stencilReflection = 1, stencilShadow = 1, offsetShadow = 1;
+static int renderShadow = 1, renderDinosaur = 1, renderReflection = 1;
+static int linearFiltering = 0, useMipmaps = 0, useTexture = 1;
+static int reportSpeed = 0;
+static int animation = 1;
+static GLboolean lightSwitch = GL_TRUE;
+static int directionalLight = 1;
+static int forceExtension = 0;
+
+/* Time varying or user-controled variables. */
+static float jump = 0.0;
+static float lightAngle = 0.0, lightHeight = 20;
+GLfloat angle = -150; /* in degrees */
+GLfloat angle2 = 30; /* in degrees */
+
+int moving, startx, starty;
+int lightMoving = 0, lightStartX, lightStartY;
+
+enum {
+ MISSING, EXTENSION, ONE_DOT_ONE
+};
+int polygonOffsetVersion;
+
+static GLdouble bodyWidth = 3.0;
+/* *INDENT-OFF* */
+static GLfloat body[][2] = { {0, 3}, {1, 1}, {5, 1}, {8, 4}, {10, 4}, {11, 5},
+ {11, 11.5}, {13, 12}, {13, 13}, {10, 13.5}, {13, 14}, {13, 15}, {11, 16},
+ {8, 16}, {7, 15}, {7, 13}, {8, 12}, {7, 11}, {6, 6}, {4, 3}, {3, 2},
+ {1, 2} };
+static GLfloat arm[][2] = { {8, 10}, {9, 9}, {10, 9}, {13, 8}, {14, 9}, {16, 9},
+ {15, 9.5}, {16, 10}, {15, 10}, {15.5, 11}, {14.5, 10}, {14, 11}, {14, 10},
+ {13, 9}, {11, 11}, {9, 11} };
+static GLfloat leg[][2] = { {8, 6}, {8, 4}, {9, 3}, {9, 2}, {8, 1}, {8, 0.5}, {9, 0},
+ {12, 0}, {10, 1}, {10, 2}, {12, 4}, {11, 6}, {10, 7}, {9, 7} };
+static GLfloat eye[][2] = { {8.75, 15}, {9, 14.7}, {9.6, 14.7}, {10.1, 15},
+ {9.6, 15.25}, {9, 15.25} };
+static GLfloat lightPosition[4];
+static GLfloat lightColor[] = {0.8, 1.0, 0.8, 1.0}; /* green-tinted */
+static GLfloat skinColor[] = {0.1, 1.0, 0.1, 1.0}, eyeColor[] = {1.0, 0.2, 0.2, 1.0};
+/* *INDENT-ON* */
+
+/* Nice floor texture tiling pattern. */
+static char *circles[] = {
+ "....xxxx........",
+ "..xxxxxxxx......",
+ ".xxxxxxxxxx.....",
+ ".xxx....xxx.....",
+ "xxx......xxx....",
+ "xxx......xxx....",
+ "xxx......xxx....",
+ "xxx......xxx....",
+ ".xxx....xxx.....",
+ ".xxxxxxxxxx.....",
+ "..xxxxxxxx......",
+ "....xxxx........",
+ "................",
+ "................",
+ "................",
+ "................",
+};
+
+static void
+makeFloorTexture(void)
+{
+ GLubyte floorTexture[16][16][3];
+ GLubyte *loc;
+ int s, t;
+
+ /* Setup RGB image for the texture. */
+ loc = (GLubyte*) floorTexture;
+ for (t = 0; t < 16; t++) {
+ for (s = 0; s < 16; s++) {
+ if (circles[t][s] == 'x') {
+ /* Nice green. */
+ loc[0] = 0x1f;
+ loc[1] = 0x8f;
+ loc[2] = 0x1f;
+ } else {
+ /* Light gray. */
+ loc[0] = 0xaa;
+ loc[1] = 0xaa;
+ loc[2] = 0xaa;
+ }
+ loc += 3;
+ }
+ }
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+ if (useMipmaps) {
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+ GL_LINEAR_MIPMAP_LINEAR);
+ gluBuild2DMipmaps(GL_TEXTURE_2D, 3, 16, 16,
+ GL_RGB, GL_UNSIGNED_BYTE, floorTexture);
+ } else {
+ if (linearFiltering) {
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ } else {
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ }
+ glTexImage2D(GL_TEXTURE_2D, 0, 3, 16, 16, 0,
+ GL_RGB, GL_UNSIGNED_BYTE, floorTexture);
+ }
+}
+
+enum {
+ X, Y, Z, W
+};
+enum {
+ A, B, C, D
+};
+
+/* Create a matrix that will project the desired shadow. */
+static void
+shadowMatrix(GLfloat shadowMat[4][4],
+ GLfloat groundplane[4],
+ GLfloat lightpos[4])
+{
+ GLfloat dot;
+
+ /* Find dot product between light position vector and ground plane normal. */
+ dot = groundplane[X] * lightpos[X] +
+ groundplane[Y] * lightpos[Y] +
+ groundplane[Z] * lightpos[Z] +
+ groundplane[W] * lightpos[W];
+
+ shadowMat[0][0] = dot - lightpos[X] * groundplane[X];
+ shadowMat[1][0] = 0.f - lightpos[X] * groundplane[Y];
+ shadowMat[2][0] = 0.f - lightpos[X] * groundplane[Z];
+ shadowMat[3][0] = 0.f - lightpos[X] * groundplane[W];
+
+ shadowMat[X][1] = 0.f - lightpos[Y] * groundplane[X];
+ shadowMat[1][1] = dot - lightpos[Y] * groundplane[Y];
+ shadowMat[2][1] = 0.f - lightpos[Y] * groundplane[Z];
+ shadowMat[3][1] = 0.f - lightpos[Y] * groundplane[W];
+
+ shadowMat[X][2] = 0.f - lightpos[Z] * groundplane[X];
+ shadowMat[1][2] = 0.f - lightpos[Z] * groundplane[Y];
+ shadowMat[2][2] = dot - lightpos[Z] * groundplane[Z];
+ shadowMat[3][2] = 0.f - lightpos[Z] * groundplane[W];
+
+ shadowMat[X][3] = 0.f - lightpos[W] * groundplane[X];
+ shadowMat[1][3] = 0.f - lightpos[W] * groundplane[Y];
+ shadowMat[2][3] = 0.f - lightpos[W] * groundplane[Z];
+ shadowMat[3][3] = dot - lightpos[W] * groundplane[W];
+
+}
+
+/* Find the plane equation given 3 points. */
+static void
+findPlane(GLfloat plane[4],
+ GLfloat v0[3], GLfloat v1[3], GLfloat v2[3])
+{
+ GLfloat vec0[3], vec1[3];
+
+ /* Need 2 vectors to find cross product. */
+ vec0[X] = v1[X] - v0[X];
+ vec0[Y] = v1[Y] - v0[Y];
+ vec0[Z] = v1[Z] - v0[Z];
+
+ vec1[X] = v2[X] - v0[X];
+ vec1[Y] = v2[Y] - v0[Y];
+ vec1[Z] = v2[Z] - v0[Z];
+
+ /* find cross product to get A, B, and C of plane equation */
+ plane[A] = vec0[Y] * vec1[Z] - vec0[Z] * vec1[Y];
+ plane[B] = -(vec0[X] * vec1[Z] - vec0[Z] * vec1[X]);
+ plane[C] = vec0[X] * vec1[Y] - vec0[Y] * vec1[X];
+
+ plane[D] = -(plane[A] * v0[X] + plane[B] * v0[Y] + plane[C] * v0[Z]);
+}
+
+static void
+extrudeSolidFromPolygon(GLfloat data[][2], unsigned int dataSize,
+ GLdouble thickness, GLuint side, GLuint edge, GLuint whole)
+{
+ static GLUtriangulatorObj *tobj = NULL;
+ GLdouble vertex[3], dx, dy, len;
+ int i;
+ int count = (int) (dataSize / (2 * sizeof(GLfloat)));
+
+ if (tobj == NULL) {
+ tobj = gluNewTess(); /* create and initialize a GLU
+ polygon tesselation object */
+ gluTessCallback(tobj, GLU_BEGIN, glBegin);
+ gluTessCallback(tobj, GLU_VERTEX, glVertex2fv); /* semi-tricky */
+ gluTessCallback(tobj, GLU_END, glEnd);
+ }
+ glNewList(side, GL_COMPILE);
+ glShadeModel(GL_SMOOTH); /* smooth minimizes seeing
+ tessellation */
+ gluBeginPolygon(tobj);
+ for (i = 0; i < count; i++) {
+ vertex[0] = data[i][0];
+ vertex[1] = data[i][1];
+ vertex[2] = 0;
+ gluTessVertex(tobj, vertex, data[i]);
+ }
+ gluEndPolygon(tobj);
+ glEndList();
+ glNewList(edge, GL_COMPILE);
+ glShadeModel(GL_FLAT); /* flat shade keeps angular hands
+ from being "smoothed" */
+ glBegin(GL_QUAD_STRIP);
+ for (i = 0; i <= count; i++) {
+#if 1 /* weird, but seems to be legal */
+ /* mod function handles closing the edge */
+ glVertex3f(data[i % count][0], data[i % count][1], 0.0);
+ glVertex3f(data[i % count][0], data[i % count][1], thickness);
+ /* Calculate a unit normal by dividing by Euclidean
+ distance. We * could be lazy and use
+ glEnable(GL_NORMALIZE) so we could pass in * arbitrary
+ normals for a very slight performance hit. */
+ dx = data[(i + 1) % count][1] - data[i % count][1];
+ dy = data[i % count][0] - data[(i + 1) % count][0];
+ len = sqrt(dx * dx + dy * dy);
+ glNormal3f(dx / len, dy / len, 0.0);
+#else /* the nice way of doing it */
+ /* Calculate a unit normal by dividing by Euclidean
+ distance. We * could be lazy and use
+ glEnable(GL_NORMALIZE) so we could pass in * arbitrary
+ normals for a very slight performance hit. */
+ dx = data[i % count][1] - data[(i - 1 + count) % count][1];
+ dy = data[(i - 1 + count) % count][0] - data[i % count][0];
+ len = sqrt(dx * dx + dy * dy);
+ glNormal3f(dx / len, dy / len, 0.0);
+ /* mod function handles closing the edge */
+ glVertex3f(data[i % count][0], data[i % count][1], 0.0);
+ glVertex3f(data[i % count][0], data[i % count][1], thickness);
+#endif
+ }
+ glEnd();
+ glEndList();
+ glNewList(whole, GL_COMPILE);
+ glFrontFace(GL_CW);
+ glCallList(edge);
+ glNormal3f(0.0, 0.0, -1.0); /* constant normal for side */
+ glCallList(side);
+ glPushMatrix();
+ glTranslatef(0.0, 0.0, thickness);
+ glFrontFace(GL_CCW);
+ glNormal3f(0.0, 0.0, 1.0); /* opposite normal for other side */
+ glCallList(side);
+ glPopMatrix();
+ glEndList();
+}
+
+/* Enumerants for refering to display lists. */
+typedef enum {
+ RESERVED, BODY_SIDE, BODY_EDGE, BODY_WHOLE, ARM_SIDE, ARM_EDGE, ARM_WHOLE,
+ LEG_SIDE, LEG_EDGE, LEG_WHOLE, EYE_SIDE, EYE_EDGE, EYE_WHOLE
+} displayLists;
+
+static void
+makeDinosaur(void)
+{
+ extrudeSolidFromPolygon(body, sizeof(body), bodyWidth,
+ BODY_SIDE, BODY_EDGE, BODY_WHOLE);
+ extrudeSolidFromPolygon(arm, sizeof(arm), bodyWidth / 4,
+ ARM_SIDE, ARM_EDGE, ARM_WHOLE);
+ extrudeSolidFromPolygon(leg, sizeof(leg), bodyWidth / 2,
+ LEG_SIDE, LEG_EDGE, LEG_WHOLE);
+ extrudeSolidFromPolygon(eye, sizeof(eye), bodyWidth + 0.2,
+ EYE_SIDE, EYE_EDGE, EYE_WHOLE);
+}
+
+static void
+drawDinosaur(void)
+
+{
+ glPushMatrix();
+ /* Translate the dinosaur to be at (0,8,0). */
+ glTranslatef(-8, 0, -bodyWidth / 2);
+ glTranslatef(0.0, jump, 0.0);
+ glMaterialfv(GL_FRONT, GL_DIFFUSE, skinColor);
+ glCallList(BODY_WHOLE);
+ glTranslatef(0.0, 0.0, bodyWidth);
+ glCallList(ARM_WHOLE);
+ glCallList(LEG_WHOLE);
+ glTranslatef(0.0, 0.0, -bodyWidth - bodyWidth / 4);
+ glCallList(ARM_WHOLE);
+ glTranslatef(0.0, 0.0, -bodyWidth / 4);
+ glCallList(LEG_WHOLE);
+ glTranslatef(0.0, 0.0, bodyWidth / 2 - 0.1);
+ glMaterialfv(GL_FRONT, GL_DIFFUSE, eyeColor);
+ glCallList(EYE_WHOLE);
+ glPopMatrix();
+}
+
+static GLfloat floorVertices[4][3] = {
+ { -20.0, 0.0, 20.0 },
+ { 20.0, 0.0, 20.0 },
+ { 20.0, 0.0, -20.0 },
+ { -20.0, 0.0, -20.0 },
+};
+
+/* Draw a floor (possibly textured). */
+static void
+drawFloor(void)
+{
+ glDisable(GL_LIGHTING);
+
+ if (useTexture) {
+ glEnable(GL_TEXTURE_2D);
+ }
+
+ glBegin(GL_QUADS);
+ glTexCoord2f(0.0, 0.0);
+ glVertex3fv(floorVertices[0]);
+ glTexCoord2f(0.0, 16.0);
+ glVertex3fv(floorVertices[1]);
+ glTexCoord2f(16.0, 16.0);
+ glVertex3fv(floorVertices[2]);
+ glTexCoord2f(16.0, 0.0);
+ glVertex3fv(floorVertices[3]);
+ glEnd();
+
+ if (useTexture) {
+ glDisable(GL_TEXTURE_2D);
+ }
+
+ glEnable(GL_LIGHTING);
+}
+
+static GLfloat floorPlane[4];
+static GLfloat floorShadow[4][4];
+
+static void
+redraw(void)
+{
+ int start = 0, end = 0;
+
+ if (reportSpeed) {
+ start = glutGet(GLUT_ELAPSED_TIME);
+ }
+
+ /* Clear; default stencil clears to zero. */
+ if ((stencilReflection && renderReflection) || (stencilShadow && renderShadow)) {
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+ } else {
+ /* Avoid clearing stencil when not using it. */
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ }
+
+ /* Reposition the light source. */
+ lightPosition[0] = 12*cos(lightAngle);
+ lightPosition[1] = lightHeight;
+ lightPosition[2] = 12*sin(lightAngle);
+ if (directionalLight) {
+ lightPosition[3] = 0.0;
+ } else {
+ lightPosition[3] = 1.0;
+ }
+
+ shadowMatrix(floorShadow, floorPlane, lightPosition);
+
+ glPushMatrix();
+ /* Perform scene rotations based on user mouse input. */
+ glRotatef(angle2, 1.0, 0.0, 0.0);
+ glRotatef(angle, 0.0, 1.0, 0.0);
+
+ /* Tell GL new light source position. */
+ glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
+
+ if (renderReflection) {
+ if (stencilReflection) {
+ /* We can eliminate the visual "artifact" of seeing the "flipped"
+ dinosaur underneath the floor by using stencil. The idea is
+ draw the floor without color or depth update but so that
+ a stencil value of one is where the floor will be. Later when
+ rendering the dinosaur reflection, we will only update pixels
+ with a stencil value of 1 to make sure the reflection only
+ lives on the floor, not below the floor. */
+
+ /* Don't update color or depth. */
+ glDisable(GL_DEPTH_TEST);
+ glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+
+ /* Draw 1 into the stencil buffer. */
+ glEnable(GL_STENCIL_TEST);
+ glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
+ glStencilFunc(GL_ALWAYS, 1, 0xffffffff);
+
+ /* Now render floor; floor pixels just get their stencil set to 1. */
+ drawFloor();
+
+ /* Re-enable update of color and depth. */
+ glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+ glEnable(GL_DEPTH_TEST);
+
+ /* Now, only render where stencil is set to 1. */
+ glStencilFunc(GL_EQUAL, 1, 0xffffffff); /* draw if ==1 */
+ glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+ }
+
+ glPushMatrix();
+
+ /* The critical reflection step: Reflect dinosaur through the floor
+ (the Y=0 plane) to make a relection. */
+ glScalef(1.0, -1.0, 1.0);
+
+ /* Reflect the light position. */
+ glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
+
+ /* To avoid our normals getting reversed and hence botched lighting
+ on the reflection, turn on normalize. */
+ glEnable(GL_NORMALIZE);
+ glCullFace(GL_FRONT);
+
+ /* Draw the reflected dinosaur. */
+ drawDinosaur();
+
+ /* Disable noramlize again and re-enable back face culling. */
+ glDisable(GL_NORMALIZE);
+ glCullFace(GL_BACK);
+
+ glPopMatrix();
+
+ /* Switch back to the unreflected light position. */
+ glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
+
+ if (stencilReflection) {
+ glDisable(GL_STENCIL_TEST);
+ }
+ }
+
+ /* Back face culling will get used to only draw either the top or the
+ bottom floor. This let's us get a floor with two distinct
+ appearances. The top floor surface is reflective and kind of red.
+ The bottom floor surface is not reflective and blue. */
+
+ /* Draw "bottom" of floor in blue. */
+ glFrontFace(GL_CW); /* Switch face orientation. */
+ glColor4f(0.1, 0.1, 0.7, 1.0);
+ drawFloor();
+ glFrontFace(GL_CCW);
+
+ if (renderShadow) {
+ if (stencilShadow) {
+ /* Draw the floor with stencil value 3. This helps us only
+ draw the shadow once per floor pixel (and only on the
+ floor pixels). */
+ glEnable(GL_STENCIL_TEST);
+ glStencilFunc(GL_ALWAYS, 3, 0xffffffff);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
+ }
+ }
+
+ /* Draw "top" of floor. Use blending to blend in reflection. */
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glColor4f(0.7, 0.0, 0.0, 0.3);
+ glColor4f(1.0, 1.0, 1.0, 0.3);
+ drawFloor();
+ glDisable(GL_BLEND);
+
+ if (renderDinosaur) {
+ /* Draw "actual" dinosaur, not its reflection. */
+ drawDinosaur();
+ }
+
+ if (renderShadow) {
+
+ /* Render the projected shadow. */
+
+ if (stencilShadow) {
+
+ /* Now, only render where stencil is set above 2 (ie, 3 where
+ the top floor is). Update stencil with 2 where the shadow
+ gets drawn so we don't redraw (and accidently reblend) the
+ shadow). */
+ glStencilFunc(GL_LESS, 2, 0xffffffff); /* draw if ==1 */
+ glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
+ }
+
+ /* To eliminate depth buffer artifacts, we use polygon offset
+ to raise the depth of the projected shadow slightly so
+ that it does not depth buffer alias with the floor. */
+ if (offsetShadow) {
+ switch (polygonOffsetVersion) {
+ case EXTENSION:
+#ifdef GL_EXT_polygon_offset
+ glEnable(GL_POLYGON_OFFSET_EXT);
+ break;
+#endif
+#ifdef GL_VERSION_1_1
+ case ONE_DOT_ONE:
+ glEnable(GL_POLYGON_OFFSET_FILL);
+ break;
+#endif
+ case MISSING:
+ /* Oh well. */
+ break;
+ }
+ }
+
+ /* Render 50% black shadow color on top of whatever the
+ floor appareance is. */
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glDisable(GL_LIGHTING); /* Force the 50% black. */
+ glColor4f(0.0, 0.0, 0.0, 0.5);
+
+ glPushMatrix();
+ /* Project the shadow. */
+ glMultMatrixf((GLfloat *) floorShadow);
+ drawDinosaur();
+ glPopMatrix();
+
+ glDisable(GL_BLEND);
+ glEnable(GL_LIGHTING);
+
+ if (offsetShadow) {
+ switch (polygonOffsetVersion) {
+#ifdef GL_EXT_polygon_offset
+ case EXTENSION:
+ glDisable(GL_POLYGON_OFFSET_EXT);
+ break;
+#endif
+#ifdef GL_VERSION_1_1
+ case ONE_DOT_ONE:
+ glDisable(GL_POLYGON_OFFSET_FILL);
+ break;
+#endif
+ case MISSING:
+ /* Oh well. */
+ break;
+ }
+ }
+ if (stencilShadow) {
+ glDisable(GL_STENCIL_TEST);
+ }
+ }
+
+ glPushMatrix();
+ glDisable(GL_LIGHTING);
+ glColor3f(1.0, 1.0, 0.0);
+ if (directionalLight) {
+ /* Draw an arrowhead. */
+ glDisable(GL_CULL_FACE);
+ glTranslatef(lightPosition[0], lightPosition[1], lightPosition[2]);
+ glRotatef(lightAngle * -180.0 / M_PI, 0, 1, 0);
+ glRotatef(atan(lightHeight/12) * 180.0 / M_PI, 0, 0, 1);
+ glBegin(GL_TRIANGLE_FAN);
+ glVertex3f(0, 0, 0);
+ glVertex3f(2, 1, 1);
+ glVertex3f(2, -1, 1);
+ glVertex3f(2, -1, -1);
+ glVertex3f(2, 1, -1);
+ glVertex3f(2, 1, 1);
+ glEnd();
+ /* Draw a white line from light direction. */
+ glColor3f(1.0, 1.0, 1.0);
+ glBegin(GL_LINES);
+ glVertex3f(0, 0, 0);
+ glVertex3f(5, 0, 0);
+ glEnd();
+ glEnable(GL_CULL_FACE);
+ } else {
+ /* Draw a yellow ball at the light source. */
+ glTranslatef(lightPosition[0], lightPosition[1], lightPosition[2]);
+ glutSolidSphere(1.0, 5, 5);
+ }
+ glEnable(GL_LIGHTING);
+ glPopMatrix();
+
+ glPopMatrix();
+
+ if (reportSpeed) {
+ glFinish();
+ end = glutGet(GLUT_ELAPSED_TIME);
+ printf("Speed %.3g frames/sec (%d ms)\n", 1000.0/(end-start), end-start);
+ fflush(stdout);
+ }
+
+ glutSwapBuffers();
+}
+
+/* ARGSUSED2 */
+static void
+mouse(int button, int state, int x, int y)
+{
+ if (button == GLUT_LEFT_BUTTON) {
+ if (state == GLUT_DOWN) {
+ moving = 1;
+ startx = x;
+ starty = y;
+ }
+ if (state == GLUT_UP) {
+ moving = 0;
+ }
+ }
+ if (button == GLUT_MIDDLE_BUTTON) {
+ if (state == GLUT_DOWN) {
+ lightMoving = 1;
+ lightStartX = x;
+ lightStartY = y;
+ }
+ if (state == GLUT_UP) {
+ lightMoving = 0;
+ }
+ }
+}
+
+/* ARGSUSED1 */
+static void
+motion(int x, int y)
+{
+ if (moving) {
+ angle = angle + (x - startx);
+ angle2 = angle2 + (y - starty);
+ startx = x;
+ starty = y;
+ glutPostRedisplay();
+ }
+ if (lightMoving) {
+ lightAngle += (x - lightStartX)/40.0;
+ lightHeight += (lightStartY - y)/20.0;
+ lightStartX = x;
+ lightStartY = y;
+ glutPostRedisplay();
+ }
+}
+
+/* Advance time varying state when idle callback registered. */
+static void
+idle(void)
+{
+ static float time = 0.0;
+
+ time = glutGet(GLUT_ELAPSED_TIME) / 500.0;
+
+ jump = 4.0 * fabs(sin(time)*0.5);
+ if (!lightMoving) {
+ lightAngle += 0.03;
+ }
+ glutPostRedisplay();
+}
+
+enum {
+ M_NONE, M_MOTION, M_LIGHT, M_TEXTURE, M_SHADOWS, M_REFLECTION, M_DINOSAUR,
+ M_STENCIL_REFLECTION, M_STENCIL_SHADOW, M_OFFSET_SHADOW,
+ M_POSITIONAL, M_DIRECTIONAL, M_PERFORMANCE
+};
+
+static void
+controlLights(int value)
+{
+ switch (value) {
+ case M_NONE:
+ return;
+ case M_MOTION:
+ animation = 1 - animation;
+ if (animation) {
+ glutIdleFunc(idle);
+ } else {
+ glutIdleFunc(NULL);
+ }
+ break;
+ case M_LIGHT:
+ lightSwitch = !lightSwitch;
+ if (lightSwitch) {
+ glEnable(GL_LIGHT0);
+ } else {
+ glDisable(GL_LIGHT0);
+ }
+ break;
+ case M_TEXTURE:
+ useTexture = !useTexture;
+ break;
+ case M_SHADOWS:
+ renderShadow = 1 - renderShadow;
+ break;
+ case M_REFLECTION:
+ renderReflection = 1 - renderReflection;
+ break;
+ case M_DINOSAUR:
+ renderDinosaur = 1 - renderDinosaur;
+ break;
+ case M_STENCIL_REFLECTION:
+ stencilReflection = 1 - stencilReflection;
+ break;
+ case M_STENCIL_SHADOW:
+ stencilShadow = 1 - stencilShadow;
+ break;
+ case M_OFFSET_SHADOW:
+ offsetShadow = 1 - offsetShadow;
+ break;
+ case M_POSITIONAL:
+ directionalLight = 0;
+ break;
+ case M_DIRECTIONAL:
+ directionalLight = 1;
+ break;
+ case M_PERFORMANCE:
+ reportSpeed = 1 - reportSpeed;
+ break;
+ }
+ glutPostRedisplay();
+}
+
+/* When not visible, stop animating. Restart when visible again. */
+static void
+visible(int vis)
+{
+ if (vis == GLUT_VISIBLE) {
+ if (animation)
+ glutIdleFunc(idle);
+ } else {
+ if (!animation)
+ glutIdleFunc(NULL);
+ }
+}
+
+/* Press any key to redraw; good when motion stopped and
+ performance reporting on. */
+/* ARGSUSED */
+static void
+key(unsigned char c, int x, int y)
+{
+ if (c == 27) {
+ exit(0); /* IRIS GLism, Escape quits. */
+ }
+ glutPostRedisplay();
+}
+
+/* Press any key to redraw; good when motion stopped and
+ performance reporting on. */
+/* ARGSUSED */
+static void
+special(int k, int x, int y)
+{
+ glutPostRedisplay();
+}
+
+static int
+supportsOneDotOne(void)
+{
+ const char *version;
+ int major, minor;
+
+ version = (char *) glGetString(GL_VERSION);
+ if (sscanf(version, "%d.%d", &major, &minor) == 2)
+ return major * 10 + minor >= 11;
+ return 0; /* OpenGL version string malformed! */
+}
+
+int
+main(int argc, char **argv)
+{
+ int i;
+
+ glutInit(&argc, argv);
+
+ for (i=1; i<argc; i++) {
+ if (!strcmp("-linear", argv[i])) {
+ linearFiltering = 1;
+ } else if (!strcmp("-mipmap", argv[i])) {
+ useMipmaps = 1;
+ } else if (!strcmp("-ext", argv[i])) {
+ forceExtension = 1;
+ }
+ }
+
+ glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_STENCIL);
+
+#if 0
+ /* In GLUT 4.0, you'll be able to do this an be sure to
+ get 2 bits of stencil if the machine has it for you. */
+ glutInitDisplayString("samples stencil>=2 rgb double depth");
+#endif
+
+ glutCreateWindow("Shadowy Leapin' Lizards");
+ glewInit();
+
+ if (glutGet(GLUT_WINDOW_STENCIL_SIZE) <= 1) {
+ printf("dinoshade: Sorry, I need at least 2 bits of stencil.\n");
+ exit(1);
+ }
+
+ /* Register GLUT callbacks. */
+ glutDisplayFunc(redraw);
+ glutMouseFunc(mouse);
+ glutMotionFunc(motion);
+ glutVisibilityFunc(visible);
+ glutKeyboardFunc(key);
+ glutSpecialFunc(special);
+
+ glutCreateMenu(controlLights);
+
+ glutAddMenuEntry("Toggle motion", M_MOTION);
+ glutAddMenuEntry("-----------------------", M_NONE);
+ glutAddMenuEntry("Toggle light", M_LIGHT);
+ glutAddMenuEntry("Toggle texture", M_TEXTURE);
+ glutAddMenuEntry("Toggle shadows", M_SHADOWS);
+ glutAddMenuEntry("Toggle reflection", M_REFLECTION);
+ glutAddMenuEntry("Toggle dinosaur", M_DINOSAUR);
+ glutAddMenuEntry("-----------------------", M_NONE);
+ glutAddMenuEntry("Toggle reflection stenciling", M_STENCIL_REFLECTION);
+ glutAddMenuEntry("Toggle shadow stenciling", M_STENCIL_SHADOW);
+ glutAddMenuEntry("Toggle shadow offset", M_OFFSET_SHADOW);
+ glutAddMenuEntry("----------------------", M_NONE);
+ glutAddMenuEntry("Positional light", M_POSITIONAL);
+ glutAddMenuEntry("Directional light", M_DIRECTIONAL);
+ glutAddMenuEntry("-----------------------", M_NONE);
+ glutAddMenuEntry("Toggle performance", M_PERFORMANCE);
+ glutAttachMenu(GLUT_RIGHT_BUTTON);
+ makeDinosaur();
+
+#ifdef GL_VERSION_1_1
+ if (supportsOneDotOne() && !forceExtension) {
+ polygonOffsetVersion = ONE_DOT_ONE;
+ glPolygonOffset(-2.0, -9.0);
+ } else
+#endif
+ {
+#ifdef GL_EXT_polygon_offset
+ /* check for the polygon offset extension */
+ if (glutExtensionSupported("GL_EXT_polygon_offset")) {
+ polygonOffsetVersion = EXTENSION;
+ glPolygonOffsetEXT(-2.0, -0.002);
+ } else
+#endif
+ {
+ polygonOffsetVersion = MISSING;
+ printf("\ndinoshine: Missing polygon offset.\n");
+ printf(" Expect shadow depth aliasing artifacts.\n\n");
+ fflush(stdout);
+ }
+ }
+
+ glEnable(GL_CULL_FACE);
+ glEnable(GL_DEPTH_TEST);
+ glEnable(GL_TEXTURE_2D);
+ glLineWidth(3.0);
+
+ glMatrixMode(GL_PROJECTION);
+ gluPerspective( /* field of view in degree */ 40.0,
+ /* aspect ratio */ 1.0,
+ /* Z near */ 20.0, /* Z far */ 100.0);
+ glMatrixMode(GL_MODELVIEW);
+ gluLookAt(0.0, 8.0, 60.0, /* eye is at (0,8,60) */
+ 0.0, 8.0, 0.0, /* center is at (0,8,0) */
+ 0.0, 1.0, 0.); /* up is in postivie Y direction */
+
+ glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, 1);
+ glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor);
+ glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 0.1);
+ glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.05);
+ glEnable(GL_LIGHT0);
+ glEnable(GL_LIGHTING);
+
+ makeFloorTexture();
+
+ /* Setup floor plane for projected shadow calculations. */
+ findPlane(floorPlane, floorVertices[1], floorVertices[2], floorVertices[3]);
+
+ glutMainLoop();
+ return 0; /* ANSI C requires main to return int. */
+}
diff --git a/progs/demos/fbotexture.c b/progs/demos/fbotexture.c
new file mode 100644
index 0000000000..50a4b00afc
--- /dev/null
+++ b/progs/demos/fbotexture.c
@@ -0,0 +1,621 @@
+/*
+ * Test GL_EXT_framebuffer_object render-to-texture
+ *
+ * Draw a teapot into a texture image with stenciling.
+ * Then draw a textured quad using that texture.
+ *
+ * Brian Paul
+ * 18 Apr 2005
+ */
+
+
+#include <GL/glew.h>
+#include <GL/glut.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+/* For debug */
+#define DEPTH 1
+#define STENCIL 1
+#define DRAW 1
+
+
+static int Win = 0;
+static int Width = 400, Height = 400;
+
+#if 1
+static GLenum TexTarget = GL_TEXTURE_2D;
+static int TexWidth = 512, TexHeight = 512;
+static GLenum TexIntFormat = GL_RGB; /* either GL_RGB or GL_RGBA */
+#else
+static GLenum TexTarget = GL_TEXTURE_RECTANGLE_ARB;
+static int TexWidth = 200, TexHeight = 200;
+static GLenum TexIntFormat = GL_RGB5; /* either GL_RGB or GL_RGBA */
+#endif
+static GLuint TextureLevel = 0; /* which texture level to render to */
+
+static GLuint MyFB;
+static GLuint TexObj;
+static GLuint DepthRB = 0, StencilRB = 0;
+static GLboolean Anim = GL_FALSE;
+static GLfloat Rot = 0.0;
+static GLboolean UsePackedDepthStencil = GL_FALSE;
+static GLboolean UsePackedDepthStencilBoth = GL_FALSE;
+static GLboolean Use_ARB_fbo = GL_FALSE;
+static GLboolean Cull = GL_FALSE;
+static GLboolean Wireframe = GL_FALSE;
+
+
+static void
+CheckError(int line)
+{
+ GLenum err = glGetError();
+ if (err) {
+ printf("GL Error 0x%x at line %d\n", (int) err, line);
+ }
+}
+
+
+static void
+Idle(void)
+{
+ Rot = glutGet(GLUT_ELAPSED_TIME) * 0.1;
+ glutPostRedisplay();
+}
+
+
+static void
+RenderTexture(void)
+{
+ GLenum status;
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glTranslatef(0.0, 0.0, -15.0);
+
+ /* draw to texture image */
+ glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, MyFB);
+
+ status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ printf("Framebuffer incomplete!!!\n");
+ }
+
+ glViewport(0, 0, TexWidth, TexHeight);
+
+ glClearColor(0.5, 0.5, 1.0, 0.0);
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+ CheckError(__LINE__);
+
+#if DEPTH
+ glEnable(GL_DEPTH_TEST);
+#endif
+
+#if STENCIL
+ glEnable(GL_STENCIL_TEST);
+ glStencilFunc(GL_NEVER, 1, ~0);
+ glStencilOp(GL_REPLACE, GL_KEEP, GL_REPLACE);
+#endif
+
+ CheckError(__LINE__);
+
+#if DEPTH || STENCIL
+ /* draw diamond-shaped stencil pattern */
+ glColor3f(0, 1, 0);
+ glBegin(GL_POLYGON);
+ glVertex2f(-0.2, 0.0);
+ glVertex2f( 0.0, -0.2);
+ glVertex2f( 0.2, 0.0);
+ glVertex2f( 0.0, 0.2);
+ glEnd();
+#endif
+
+ /* draw teapot where stencil != 1 */
+#if STENCIL
+ glStencilFunc(GL_NOTEQUAL, 1, ~0);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+#endif
+
+ CheckError(__LINE__);
+
+ if (Wireframe) {
+ glPolygonMode(GL_FRONT, GL_LINE);
+ }
+ else {
+ glPolygonMode(GL_FRONT, GL_FILL);
+ }
+
+ if (Cull) {
+ /* cull back */
+ glCullFace(GL_BACK);
+ glEnable(GL_CULL_FACE);
+ }
+ else {
+ glDisable(GL_CULL_FACE);
+ }
+
+#if 0
+ glBegin(GL_POLYGON);
+ glColor3f(1, 0, 0);
+ glVertex2f(-1, -1);
+ glColor3f(0, 1, 0);
+ glVertex2f(1, -1);
+ glColor3f(0, 0, 1);
+ glVertex2f(0, 1);
+ glEnd();
+#else
+ glEnable(GL_LIGHTING);
+ glEnable(GL_LIGHT0);
+ glPushMatrix();
+ glRotatef(0.5 * Rot, 1.0, 0.0, 0.0);
+ glFrontFace(GL_CW); /* Teapot patches backward */
+ glutSolidTeapot(0.5);
+ glFrontFace(GL_CCW);
+ glPopMatrix();
+ glDisable(GL_LIGHTING);
+ /*
+ PrintStencilHistogram(TexWidth, TexHeight);
+ */
+#endif
+
+ glDisable(GL_DEPTH_TEST);
+ glDisable(GL_STENCIL_TEST);
+ glDisable(GL_CULL_FACE);
+ glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+
+#if DRAW
+ /* Bind normal framebuffer */
+ glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+#endif
+
+ CheckError(__LINE__);
+}
+
+
+
+static void
+Display(void)
+{
+ float ar = (float) Width / (float) Height;
+
+ RenderTexture();
+
+ /* draw textured quad in the window */
+#if DRAW
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glFrustum(-ar, ar, -1.0, 1.0, 5.0, 25.0);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glTranslatef(0.0, 0.0, -7.0);
+
+ glViewport(0, 0, Width, Height);
+
+ glClearColor(0.25, 0.25, 0.25, 0);
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glPushMatrix();
+ glRotatef(Rot, 0, 1, 0);
+ glEnable(TexTarget);
+ glBindTexture(TexTarget, TexObj);
+ glBegin(GL_POLYGON);
+ glColor3f(0.25, 0.25, 0.25);
+ if (TexTarget == GL_TEXTURE_2D) {
+ glTexCoord2f(0, 0);
+ glVertex2f(-1, -1);
+ glTexCoord2f(1, 0);
+ glVertex2f(1, -1);
+ glColor3f(1.0, 1.0, 1.0);
+ glTexCoord2f(1, 1);
+ glVertex2f(1, 1);
+ glTexCoord2f(0, 1);
+ glVertex2f(-1, 1);
+ }
+ else {
+ assert(TexTarget == GL_TEXTURE_RECTANGLE_ARB);
+ glTexCoord2f(0, 0);
+ glVertex2f(-1, -1);
+ glTexCoord2f(TexWidth, 0);
+ glVertex2f(1, -1);
+ glColor3f(1.0, 1.0, 1.0);
+ glTexCoord2f(TexWidth, TexHeight);
+ glVertex2f(1, 1);
+ glTexCoord2f(0, TexHeight);
+ glVertex2f(-1, 1);
+ }
+ glEnd();
+ glPopMatrix();
+ glDisable(TexTarget);
+#endif
+
+ glutSwapBuffers();
+ CheckError(__LINE__);
+}
+
+
+static void
+Reshape(int width, int height)
+{
+ glViewport(0, 0, width, height);
+ Width = width;
+ Height = height;
+}
+
+
+static void
+CleanUp(void)
+{
+#if DEPTH
+ glDeleteRenderbuffersEXT(1, &DepthRB);
+#endif
+#if STENCIL
+ glDeleteRenderbuffersEXT(1, &StencilRB);
+#endif
+ glDeleteFramebuffersEXT(1, &MyFB);
+
+ glDeleteTextures(1, &TexObj);
+
+ glutDestroyWindow(Win);
+
+ exit(0);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+ (void) x;
+ (void) y;
+ switch (key) {
+ case 'a':
+ Anim = !Anim;
+ if (Anim)
+ glutIdleFunc(Idle);
+ else
+ glutIdleFunc(NULL);
+ break;
+ case 'c':
+ Cull = !Cull;
+ break;
+ case 'w':
+ Wireframe = !Wireframe;
+ break;
+ case 's':
+ Rot += 2.0;
+ break;
+ case 'S':
+ Rot -= 2.0;
+ break;
+ case 27:
+ CleanUp();
+ break;
+ }
+ glutPostRedisplay();
+}
+
+
+/**
+ * Attach depth and stencil renderbuffer(s) to the given framebuffer object.
+ * \param tryDepthStencil if true, try to use a combined depth+stencil buffer
+ * \param bindDepthStencil if true, and tryDepthStencil is true, bind with
+ * the GL_DEPTH_STENCIL_ATTACHMENT target.
+ * \return GL_TRUE for success, GL_FALSE for failure
+ */
+static GLboolean
+AttachDepthAndStencilBuffers(GLuint fbo,
+ GLsizei width, GLsizei height,
+ GLboolean tryDepthStencil,
+ GLboolean bindDepthStencil,
+ GLuint *depthRbOut, GLuint *stencilRbOut)
+{
+ GLenum status;
+
+ *depthRbOut = *stencilRbOut = 0;
+
+ glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
+
+ if (tryDepthStencil) {
+ GLuint rb;
+
+ glGenRenderbuffersEXT(1, &rb);
+ glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, rb);
+ glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,
+ GL_DEPTH24_STENCIL8_EXT,
+ width, height);
+ if (glGetError())
+ return GL_FALSE;
+
+ if (bindDepthStencil) {
+ /* attach to both depth and stencil at once */
+ glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
+ GL_DEPTH_STENCIL_ATTACHMENT,
+ GL_RENDERBUFFER_EXT, rb);
+ if (glGetError())
+ return GL_FALSE;
+ }
+ else {
+ /* attach to depth attachment point */
+ glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
+ GL_DEPTH_ATTACHMENT_EXT,
+ GL_RENDERBUFFER_EXT, rb);
+ if (glGetError())
+ return GL_FALSE;
+
+ /* and attach to stencil attachment point */
+ glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
+ GL_STENCIL_ATTACHMENT_EXT,
+ GL_RENDERBUFFER_EXT, rb);
+ if (glGetError())
+ return GL_FALSE;
+ }
+
+ status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ if (status != GL_FRAMEBUFFER_COMPLETE_EXT)
+ return GL_FALSE;
+
+ *depthRbOut = *stencilRbOut = rb;
+ return GL_TRUE;
+ }
+
+ /* just depth renderbuffer */
+ {
+ GLuint rb;
+
+ glGenRenderbuffersEXT(1, &rb);
+ glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, rb);
+ glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,
+ GL_DEPTH_COMPONENT,
+ width, height);
+ if (glGetError())
+ return GL_FALSE;
+
+ /* attach to depth attachment point */
+ glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
+ GL_DEPTH_ATTACHMENT_EXT,
+ GL_RENDERBUFFER_EXT, rb);
+ if (glGetError())
+ return GL_FALSE;
+
+ status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ if (status != GL_FRAMEBUFFER_COMPLETE_EXT)
+ return GL_FALSE;
+
+ *depthRbOut = rb;
+ }
+
+ /* just stencil renderbuffer */
+ {
+ GLuint rb;
+
+ glGenRenderbuffersEXT(1, &rb);
+ glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, rb);
+ glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,
+ GL_STENCIL_INDEX,
+ width, height);
+ if (glGetError())
+ return GL_FALSE;
+
+ /* attach to depth attachment point */
+ glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
+ GL_STENCIL_ATTACHMENT_EXT,
+ GL_RENDERBUFFER_EXT, rb);
+ if (glGetError())
+ return GL_FALSE;
+
+ status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ glDeleteRenderbuffersEXT(1, depthRbOut);
+ *depthRbOut = 0;
+ glDeleteRenderbuffersEXT(1, &rb);
+ return GL_FALSE;
+ }
+
+ *stencilRbOut = rb;
+ }
+
+ return GL_TRUE;
+}
+
+
+static void
+ParseArgs(int argc, char *argv[])
+{
+ GLint i;
+ for (i = 1; i < argc; i++) {
+ if (strcmp(argv[i], "-ds") == 0) {
+ if (!glutExtensionSupported("GL_EXT_packed_depth_stencil")) {
+ printf("GL_EXT_packed_depth_stencil not found!\n");
+ exit(0);
+ }
+ UsePackedDepthStencil = GL_TRUE;
+ printf("Using GL_EXT_packed_depth_stencil\n");
+ }
+ else if (strcmp(argv[i], "-ds2") == 0) {
+ if (!glutExtensionSupported("GL_EXT_packed_depth_stencil")) {
+ printf("GL_EXT_packed_depth_stencil not found!\n");
+ exit(0);
+ }
+ if (!glutExtensionSupported("GL_ARB_framebuffer_object")) {
+ printf("GL_ARB_framebuffer_object not found!\n");
+ exit(0);
+ }
+ UsePackedDepthStencilBoth = GL_TRUE;
+ printf("Using GL_EXT_packed_depth_stencil and GL_DEPTH_STENCIL attachment point\n");
+ }
+ else if (strcmp(argv[i], "-arb") == 0) {
+ if (!glutExtensionSupported("GL_ARB_framebuffer_object")) {
+ printf("Sorry, GL_ARB_framebuffer object not supported!\n");
+ }
+ else {
+ Use_ARB_fbo = GL_TRUE;
+ }
+ }
+ else {
+ printf("Unknown option: %s\n", argv[i]);
+ }
+ }
+}
+
+
+/*
+ * Make FBO to render into given texture.
+ */
+static GLuint
+MakeFBO_RenderTexture(GLuint TexObj)
+{
+ GLuint fb;
+ GLint sizeFudge = 0;
+
+ glGenFramebuffersEXT(1, &fb);
+ glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
+ /* Render color to texture */
+ glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
+ TexTarget, TexObj, TextureLevel);
+
+ if (Use_ARB_fbo) {
+ /* use a smaller depth buffer to see what happens */
+ sizeFudge = 90;
+ }
+
+ /* Setup depth and stencil buffers */
+ {
+ GLboolean b;
+ b = AttachDepthAndStencilBuffers(fb,
+ TexWidth - sizeFudge,
+ TexHeight - sizeFudge,
+ UsePackedDepthStencil,
+ UsePackedDepthStencilBoth,
+ &DepthRB, &StencilRB);
+ if (!b) {
+ /* try !UsePackedDepthStencil */
+ b = AttachDepthAndStencilBuffers(fb,
+ TexWidth - sizeFudge,
+ TexHeight - sizeFudge,
+ !UsePackedDepthStencil,
+ UsePackedDepthStencilBoth,
+ &DepthRB, &StencilRB);
+ }
+ if (!b) {
+ printf("Unable to create/attach depth and stencil renderbuffers "
+ " to FBO!\n");
+ exit(1);
+ }
+ }
+
+ /* queries */
+ {
+ GLint bits, w, h;
+
+ glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, DepthRB);
+ glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT,
+ GL_RENDERBUFFER_WIDTH_EXT, &w);
+ glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT,
+ GL_RENDERBUFFER_HEIGHT_EXT, &h);
+ printf("Color/Texture size: %d x %d\n", TexWidth, TexHeight);
+ printf("Depth buffer size: %d x %d\n", w, h);
+
+ glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT,
+ GL_RENDERBUFFER_DEPTH_SIZE_EXT, &bits);
+ printf("Depth renderbuffer size = %d bits\n", bits);
+
+ glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, StencilRB);
+ glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT,
+ GL_RENDERBUFFER_STENCIL_SIZE_EXT, &bits);
+ printf("Stencil renderbuffer size = %d bits\n", bits);
+ }
+
+ /* bind the regular framebuffer */
+ glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+
+ return fb;
+}
+
+
+static void
+Init(void)
+{
+ if (!glutExtensionSupported("GL_EXT_framebuffer_object")) {
+ printf("GL_EXT_framebuffer_object not found!\n");
+ exit(0);
+ }
+
+ printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+
+ /* lighting */
+ {
+ static const GLfloat mat[4] = { 1.0, 0.5, 0.5, 1.0 };
+ glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, mat);
+ }
+
+ /*
+ * Make texture object/image (we'll render into this texture)
+ */
+ {
+ glGenTextures(1, &TexObj);
+ glBindTexture(TexTarget, TexObj);
+
+ /* make two image levels */
+ glTexImage2D(TexTarget, 0, TexIntFormat, TexWidth, TexHeight, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+ if (TexTarget == GL_TEXTURE_2D) {
+ glTexImage2D(TexTarget, 1, TexIntFormat, TexWidth/2, TexHeight/2, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+ TexWidth = TexWidth >> TextureLevel;
+ TexHeight = TexHeight >> TextureLevel;
+ glTexParameteri(TexTarget, GL_TEXTURE_MAX_LEVEL, TextureLevel);
+ }
+
+ glTexParameteri(TexTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(TexTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameteri(TexTarget, GL_TEXTURE_BASE_LEVEL, TextureLevel);
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+ }
+
+ MyFB = MakeFBO_RenderTexture(TexObj);
+}
+
+
+static void
+Usage(void)
+{
+ printf("Usage:\n");
+ printf(" -ds Use combined depth/stencil renderbuffer\n");
+ printf(" -arb Try GL_ARB_framebuffer_object's mismatched buffer sizes\n");
+ printf(" -ds2 Try GL_ARB_framebuffer_object's GL_DEPTH_STENCIL_ATTACHMENT\n");
+ printf("Keys:\n");
+ printf(" a Toggle animation\n");
+ printf(" s/s Step/rotate\n");
+ printf(" c Toggle back-face culling\n");
+ printf(" w Toggle wireframe mode (front-face only)\n");
+ printf(" Esc Exit\n");
+}
+
+
+int
+main(int argc, char *argv[])
+{
+ glutInit(&argc, argv);
+ glutInitWindowPosition(0, 0);
+ glutInitWindowSize(Width, Height);
+ glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+ Win = glutCreateWindow(argv[0]);
+ glewInit();
+ glutReshapeFunc(Reshape);
+ glutKeyboardFunc(Key);
+ glutDisplayFunc(Display);
+ if (Anim)
+ glutIdleFunc(Idle);
+
+ ParseArgs(argc, argv);
+ Init();
+ Usage();
+
+ glutMainLoop();
+ return 0;
+}
diff --git a/progs/demos/glslnoise.c b/progs/demos/glslnoise.c
deleted file mode 100644
index e972b62673..0000000000
--- a/progs/demos/glslnoise.c
+++ /dev/null
@@ -1,201 +0,0 @@
-/*
- * GLSL noise demo.
- *
- * Michal Krol
- * 20 February 2006
- *
- * Based on the original demo by:
- * Stefan Gustavson (stegu@itn.liu.se) 2004, 2005
- */
-
-#ifdef WIN32
-#include <windows.h>
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <GL/gl.h>
-#include <GL/glut.h>
-#include <GL/glext.h>
-
-#ifdef WIN32
-#define GETPROCADDRESS(F) wglGetProcAddress(F)
-#else
-#define GETPROCADDRESS(F) glutGetProcAddress(F)
-#endif
-
-static GLhandleARB fragShader;
-static GLhandleARB vertShader;
-static GLhandleARB program;
-
-static GLint uTime;
-
-static GLint t0 = 0;
-static GLint frames = 0;
-
-static GLfloat u_time = 0.0f;
-
-static PFNGLCREATESHADEROBJECTARBPROC glCreateShaderObjectARB = NULL;
-static PFNGLSHADERSOURCEARBPROC glShaderSourceARB = NULL;
-static PFNGLCOMPILESHADERARBPROC glCompileShaderARB = NULL;
-static PFNGLCREATEPROGRAMOBJECTARBPROC glCreateProgramObjectARB = NULL;
-static PFNGLATTACHOBJECTARBPROC glAttachObjectARB = NULL;
-static PFNGLLINKPROGRAMARBPROC glLinkProgramARB = NULL;
-static PFNGLUSEPROGRAMOBJECTARBPROC glUseProgramObjectARB = NULL;
-static PFNGLGETUNIFORMLOCATIONARBPROC glGetUniformLocationARB = NULL;
-static PFNGLUNIFORM1FARBPROC glUniform1fARB = NULL;
-
-static void Redisplay (void)
-{
- GLint t;
-
- glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glUniform1fARB (uTime, 0.5f * u_time);
-
- glPushMatrix ();
- glutSolidSphere (2.0, 20, 10);
- glPopMatrix ();
-
- glutSwapBuffers();
- frames++;
-
- t = glutGet (GLUT_ELAPSED_TIME);
- if (t - t0 >= 5000) {
- GLfloat seconds = (GLfloat) (t - t0) / 1000.0f;
- GLfloat fps = frames / seconds;
- printf ("%d frames in %6.3f seconds = %6.3f FPS\n", frames, seconds, fps);
- fflush(stdout);
- t0 = t;
- frames = 0;
- }
-}
-
-static void Idle (void)
-{
- u_time += 0.1f;
- glutPostRedisplay ();
-}
-
-static void Reshape (int width, int height)
-{
- glViewport (0, 0, width, height);
- glMatrixMode (GL_PROJECTION);
- glLoadIdentity ();
- glFrustum (-1.0, 1.0, -1.0, 1.0, 5.0, 25.0);
- glMatrixMode (GL_MODELVIEW);
- glLoadIdentity ();
- glTranslatef (0.0f, 0.0f, -15.0f);
-}
-
-static void Key (unsigned char key, int x, int y)
-{
- (void) x;
- (void) y;
-
- switch (key)
- {
- case 27:
- exit(0);
- break;
- }
- glutPostRedisplay ();
-}
-
-static void Init (void)
-{
- static const char *fragShaderText =
- "uniform float time;\n"
- "varying vec3 position;\n"
- "void main () {\n"
- " gl_FragColor = vec4 (vec3 (0.5 + 0.5 * noise1 (vec4 (position, time))), 1.0);\n"
- "}\n"
- ;
- static const char *vertShaderText =
- "varying vec3 position;\n"
- "void main () {\n"
- " gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
- " position = 4.0 * gl_Vertex.xyz;\n"
- "}\n"
- ;
-
- if (!glutExtensionSupported ("GL_ARB_fragment_shader"))
- {
- printf ("Sorry, this demo requires GL_ARB_fragment_shader\n");
- exit(1);
- }
- if (!glutExtensionSupported ("GL_ARB_shader_objects"))
- {
- printf ("Sorry, this demo requires GL_ARB_shader_objects\n");
- exit(1);
- }
- if (!glutExtensionSupported ("GL_ARB_shading_language_100"))
- {
- printf ("Sorry, this demo requires GL_ARB_shading_language_100\n");
- exit(1);
- }
- if (!glutExtensionSupported ("GL_ARB_vertex_shader"))
- {
- printf ("Sorry, this demo requires GL_ARB_vertex_shader\n");
- exit(1);
- }
-
- glCreateShaderObjectARB = (PFNGLCREATESHADEROBJECTARBPROC)
- GETPROCADDRESS("glCreateShaderObjectARB");
- glShaderSourceARB = (PFNGLSHADERSOURCEARBPROC)
- GETPROCADDRESS("glShaderSourceARB");
- glCompileShaderARB = (PFNGLCOMPILESHADERARBPROC)
- GETPROCADDRESS("glCompileShaderARB");
- glCreateProgramObjectARB = (PFNGLCREATEPROGRAMOBJECTARBPROC)
- GETPROCADDRESS("glCreateProgramObjectARB");
- glAttachObjectARB = (PFNGLATTACHOBJECTARBPROC)
- GETPROCADDRESS("glAttachObjectARB");
- glLinkProgramARB = (PFNGLLINKPROGRAMARBPROC)
- GETPROCADDRESS ("glLinkProgramARB");
- glUseProgramObjectARB = (PFNGLUSEPROGRAMOBJECTARBPROC)
- GETPROCADDRESS("glUseProgramObjectARB");
-
- glGetUniformLocationARB = (PFNGLGETUNIFORMLOCATIONARBPROC)
- GETPROCADDRESS("glGetUniformLocationARB");
- glUniform1fARB = (PFNGLUNIFORM1FARBPROC)
- GETPROCADDRESS("glUniform1fARB");
-
- fragShader = glCreateShaderObjectARB (GL_FRAGMENT_SHADER_ARB);
- glShaderSourceARB (fragShader, 1, &fragShaderText, NULL);
- glCompileShaderARB (fragShader);
-
- vertShader = glCreateShaderObjectARB (GL_VERTEX_SHADER_ARB);
- glShaderSourceARB (vertShader, 1, &vertShaderText, NULL);
- glCompileShaderARB (vertShader);
-
- program = glCreateProgramObjectARB ();
- glAttachObjectARB (program, fragShader);
- glAttachObjectARB (program, vertShader);
- glLinkProgramARB (program);
- glUseProgramObjectARB (program);
-
- uTime = glGetUniformLocationARB (program, "time");
-
- glClearColor (0.0f, 0.1f, 0.3f, 1.0f);
- glEnable (GL_CULL_FACE);
- glEnable (GL_DEPTH_TEST);
-
- printf ("GL_RENDERER = %s\n", (const char *) glGetString (GL_RENDERER));
-}
-
-int main (int argc, char *argv[])
-{
- glutInit (&argc, argv);
- glutInitWindowPosition ( 0, 0);
- glutInitWindowSize (200, 200);
- glutInitDisplayMode (GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
- glutCreateWindow (argv[0]);
- glutReshapeFunc (Reshape);
- glutKeyboardFunc (Key);
- glutDisplayFunc (Redisplay);
- glutIdleFunc (Idle);
- Init ();
- glutMainLoop ();
- return 0;
-}
-
diff --git a/progs/demos/glutfx.c b/progs/demos/glutfx.c
deleted file mode 100644
index 8bf5582389..0000000000
--- a/progs/demos/glutfx.c
+++ /dev/null
@@ -1,189 +0,0 @@
-
-/*
- * Example of how one might use GLUT with the 3Dfx driver in full-screen mode.
- * Note: this only works with X since we're using Mesa's GLX "hack" for
- * using Glide.
- *
- * Goals:
- * easy setup and input event handling with GLUT
- * use 3Dfx hardware
- * automatically set MESA environment variables
- * don't lose mouse input focus
- *
- * Brian Paul This file is in the public domain.
- */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <GL/glut.h>
-
-
-#define WIDTH 640
-#define HEIGHT 480
-
-
-static int Window = 0;
-static int ScreenWidth, ScreenHeight;
-static GLuint Torus = 0;
-static GLfloat Xrot = 0.0, Yrot = 0.0;
-
-
-
-static void Display( void )
-{
- static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0};
- static GLfloat red[4] = {1.0, 0.2, 0.2, 1.0};
- static GLfloat green[4] = {0.2, 1.0, 0.2, 1.0};
-
- glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
-
- glPushMatrix();
- glRotatef(Xrot, 1, 0, 0);
- glRotatef(Yrot, 0, 1, 0);
-
- glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue);
- glCallList(Torus);
-
- glRotatef(90.0, 1, 0, 0);
- glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red);
- glCallList(Torus);
-
- glRotatef(90.0, 0, 1, 0);
- glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green);
- glCallList(Torus);
-
- glPopMatrix();
-
- glutSwapBuffers();
-}
-
-
-static void Reshape( int width, int height )
-{
- float ratio = (float) width / (float) height;
-
- ScreenWidth = width;
- ScreenHeight = height;
-
- /*
- * The 3Dfx driver is limited to 640 x 480 but the X window may be larger.
- * Enforce that here.
- */
- if (width > WIDTH)
- width = WIDTH;
- if (height > HEIGHT)
- height = HEIGHT;
-
- glViewport( 0, 0, width, height );
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- glFrustum( -ratio, ratio, -1.0, 1.0, 5.0, 30.0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
- glTranslatef( 0.0, 0.0, -20.0 );
-}
-
-
-static void Key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case 27:
- glutDestroyWindow(Window);
- exit(0);
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void SpecialKey( int key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case GLUT_KEY_UP:
- break;
- case GLUT_KEY_DOWN:
- break;
- case GLUT_KEY_LEFT:
- break;
- case GLUT_KEY_RIGHT:
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void MouseMove( int x, int y )
-{
- Xrot = y - ScreenWidth / 2;
- Yrot = x - ScreenHeight / 2;
- glutPostRedisplay();
-}
-
-
-static void Init( void )
-{
- Torus = glGenLists(1);
- glNewList(Torus, GL_COMPILE);
- glutSolidTorus(0.5, 2.0, 10, 20);
- glEndList();
-
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
-
- glEnable(GL_DEPTH_TEST);
- glEnable(GL_CULL_FACE);
-}
-
-
-int main( int argc, char *argv[] )
-{
-#ifndef _WIN32
- printf("NOTE: if you've got 3Dfx VooDoo hardware you must run this");
- printf(" program as root.\n\n");
- printf("Move the mouse. Press ESC to exit.\n\n");
-#endif
-
- /* Tell Mesa GLX to use 3Dfx driver in fullscreen mode. */
- putenv("MESA_GLX_FX=fullscreen");
-
- /* Disable 3Dfx Glide splash screen */
- putenv("FX_GLIDE_NO_SPLASH=");
-
- /* Give an initial size and position so user doesn't have to place window */
- glutInitWindowPosition(0, 0);
- glutInitWindowSize(WIDTH, HEIGHT);
- glutInit( &argc, argv );
-
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
-
- Window = glutCreateWindow(argv[0]);
- if (!Window) {
- printf("Error, couldn't open window\n");
- exit(1);
- }
-
- /*
- * Want the X window to fill the screen so that we don't have to
- * worry about losing the mouse input focus.
- * Note that we won't actually see the X window since we never draw
- * to it, hence, the original X screen's contents aren't disturbed.
- */
- glutFullScreen();
-
- Init();
-
- glutReshapeFunc( Reshape );
- glutKeyboardFunc( Key );
- glutSpecialFunc( SpecialKey );
- glutDisplayFunc( Display );
- glutPassiveMotionFunc( MouseMove );
-
- glutMainLoop();
- return 0;
-}
diff --git a/progs/demos/ipers.c b/progs/demos/ipers.c
index 6e153c04e1..5d82b0dc92 100644
--- a/progs/demos/ipers.c
+++ b/progs/demos/ipers.c
@@ -237,10 +237,27 @@ special(int k, int x, int y)
}
static void
+cleanup(void)
+{
+ int i;
+
+ glDeleteTextures(1, &t1id);
+ glDeleteTextures(1, &t2id);
+
+ glDeleteLists(skydlist, 1);
+ for (i = 0; i < MAX_LOD; i++) {
+ glDeleteLists(LODdlist[i], 1);
+ glDeleteLists(LODnumpoly[i], 1);
+ }
+}
+
+
+static void
key(unsigned char k, int x, int y)
{
switch (k) {
case 27:
+ cleanup();
exit(0);
break;
@@ -707,6 +724,7 @@ main(int ac, char **av)
glutIdleFunc(draw);
glutMainLoop();
+ cleanup();
return 0;
}
diff --git a/progs/demos/occlude.c b/progs/demos/occlude.c
deleted file mode 100644
index 8f7b90984e..0000000000
--- a/progs/demos/occlude.c
+++ /dev/null
@@ -1,234 +0,0 @@
-/*
- * GL_HP_occlustion_test demo
- *
- * Brian Paul
- * 31 March 2000
- *
- * Copyright (C) 2000 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <GL/glut.h>
-#include <GL/glext.h>
-
-
-static GLfloat Xpos = 0;
-static GLboolean Anim = GL_TRUE;
-
-
-static void
-PrintString(const char *s)
-{
- while (*s) {
- glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
- s++;
- }
-}
-
-
-
-static void Idle(void)
-{
- static int lastTime = 0;
- static int sign = +1;
- int time = glutGet(GLUT_ELAPSED_TIME);
- float step;
-
- if (lastTime == 0)
- lastTime = time;
- else if (time - lastTime < 20) /* 50Hz update */
- return;
-
- step = (time - lastTime) / 1000.0 * sign;
- lastTime = time;
-
- Xpos += step;
-
- if (Xpos > 2.5) {
- Xpos = 2.5;
- sign = -1;
- }
- else if (Xpos < -2.5) {
- Xpos = -2.5;
- sign = +1;
- }
- glutPostRedisplay();
-}
-
-
-static void Display( void )
-{
- GLboolean result;
-
- glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
-
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
- glTranslatef( 0.0, 0.0, -15.0 );
-
- /* draw the occluding polygons */
- glColor3f(0, 0.6, 0.8);
- glBegin(GL_QUADS);
- glVertex2f(-1.6, -1.5);
- glVertex2f(-0.4, -1.5);
- glVertex2f(-0.4, 1.5);
- glVertex2f(-1.6, 1.5);
-
- glVertex2f( 0.4, -1.5);
- glVertex2f( 1.6, -1.5);
- glVertex2f( 1.6, 1.5);
- glVertex2f( 0.4, 1.5);
- glEnd();
-
- /* draw the test polygon with occlusion testing */
- glPushMatrix();
- glTranslatef(Xpos, 0, -0.5);
- glScalef(0.3, 0.3, 1.0);
- glRotatef(-90.0 * Xpos, 0, 0, 1);
-
- glEnable(GL_OCCLUSION_TEST_HP); /* NOTE: enabling the occlusion test */
- /* doesn't clear the result flag! */
- glColorMask(0, 0, 0, 0);
- glDepthMask(GL_FALSE);
- /* this call clear's the result flag. Not really needed for this demo. */
- glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP, &result);
-
- glBegin(GL_POLYGON);
- glVertex3f(-1, -1, 0);
- glVertex3f( 1, -1, 0);
- glVertex3f( 1, 1, 0);
- glVertex3f(-1, 1, 0);
- glEnd();
-
- glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP, &result);
- /* turn off occlusion testing */
- glDisable(GL_OCCLUSION_TEST_HP);
- glColorMask(1, 1, 1, 1);
- glDepthMask(GL_TRUE);
-
- /* draw the green rect, so we can see what's going on */
- glColor3f(0.8, 0.5, 0);
- glBegin(GL_POLYGON);
- glVertex3f(-1, -1, 0);
- glVertex3f( 1, -1, 0);
- glVertex3f( 1, 1, 0);
- glVertex3f(-1, 1, 0);
- glEnd();
-
- glPopMatrix();
-
-
- /* Print result message */
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
-
- glColor3f(1, 1, 1);
- glRasterPos3f(-0.25, -0.7, 0);
-
- if (result)
- PrintString(" Visible");
- else
- PrintString("Fully Occluded");
-
- glutSwapBuffers();
-}
-
-
-static void Reshape( int width, int height )
-{
- glViewport( 0, 0, width, height );
-}
-
-
-static void Key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case 'a':
- Anim = !Anim;
- if (Anim)
- glutIdleFunc( Idle );
- else
- glutIdleFunc( NULL );
- break;
- case 27:
- exit(0);
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void SpecialKey( int key, int x, int y )
-{
- const GLfloat step = 0.1;
- (void) x;
- (void) y;
- switch (key) {
- case GLUT_KEY_LEFT:
- Xpos -= step;
- break;
- case GLUT_KEY_RIGHT:
- Xpos += step;
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void Init( void )
-{
- const char *ext = (const char *) glGetString(GL_EXTENSIONS);
- if (!strstr(ext, "GL_HP_occlusion_test")) {
- printf("Sorry, this demo requires the GL_HP_occlusion_test extension\n");
- exit(-1);
- }
-
- glEnable(GL_DEPTH_TEST);
-}
-
-
-int main( int argc, char *argv[] )
-{
- glutInit( &argc, argv );
- glutInitWindowPosition( 0, 0 );
- glutInitWindowSize( 400, 400 );
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
- glutCreateWindow(argv[0]);
- glutReshapeFunc( Reshape );
- glutKeyboardFunc( Key );
- glutSpecialFunc( SpecialKey );
- glutIdleFunc( Idle );
- glutDisplayFunc( Display );
- Init();
- glutMainLoop();
- return 0;
-}
diff --git a/progs/demos/projtex.c b/progs/demos/projtex.c
new file mode 100644
index 0000000000..99154d7bdc
--- /dev/null
+++ b/progs/demos/projtex.c
@@ -0,0 +1,1028 @@
+
+/* projtex.c - by David Yu and David Blythe, SGI */
+
+/**
+ ** Demonstrates simple projective texture mapping.
+ **
+ ** Button1 changes view, Button2 moves texture.
+ **
+ ** (See: Segal, Korobkin, van Widenfelt, Foran, and Haeberli
+ ** "Fast Shadows and Lighting Effects Using Texture Mapping", SIGGRAPH '92)
+ **
+ ** 1994,1995 -- David G Yu
+ **
+ ** cc -o projtex projtex.c texture.c -lglut -lGLU -lGL -lX11 -lm
+ **/
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glew.h>
+#include <GL/glut.h>
+#include "readtex.h"
+
+
+/* Some <math.h> files do not define M_PI... */
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+#define MAX_TEX 4
+int NumTextures = 1;
+
+int winWidth, winHeight;
+
+GLboolean redrawContinuously = GL_FALSE;
+
+float angle, axis[3];
+enum MoveModes {
+ MoveNone, MoveView, MoveObject, MoveTexture
+};
+enum MoveModes mode = MoveNone;
+
+GLfloat objectXform[4][4];
+GLfloat textureXform[MAX_TEX][4][4];
+
+void (*drawObject) (void);
+void (*loadTexture) (void);
+GLboolean textureEnabled = GL_TRUE;
+GLboolean showProjection = GL_TRUE;
+GLboolean linearFilter = GL_TRUE;
+
+char *texFilename[MAX_TEX] = {
+ "../images/girl.rgb",
+ "../images/tile.rgb",
+ "../images/bw.rgb",
+ "../images/reflect.rgb"
+};
+
+
+GLfloat zoomFactor = 1.0;
+
+/*****************************************************************/
+
+
+static void
+ActiveTexture(int i)
+{
+ glActiveTextureARB(i);
+}
+
+
+/* matrix = identity */
+static void
+matrixIdentity(GLfloat matrix[16])
+{
+ matrix[0] = 1.0;
+ matrix[1] = 0.0;
+ matrix[2] = 0.0;
+ matrix[3] = 0.0;
+ matrix[4] = 0.0;
+ matrix[5] = 1.0;
+ matrix[6] = 0.0;
+ matrix[7] = 0.0;
+ matrix[8] = 0.0;
+ matrix[9] = 0.0;
+ matrix[10] = 1.0;
+ matrix[11] = 0.0;
+ matrix[12] = 0.0;
+ matrix[13] = 0.0;
+ matrix[14] = 0.0;
+ matrix[15] = 1.0;
+}
+
+/* matrix2 = transpose(matrix1) */
+static void
+matrixTranspose(GLfloat matrix2[16], GLfloat matrix1[16])
+{
+ matrix2[0] = matrix1[0];
+ matrix2[1] = matrix1[4];
+ matrix2[2] = matrix1[8];
+ matrix2[3] = matrix1[12];
+
+ matrix2[4] = matrix1[1];
+ matrix2[5] = matrix1[5];
+ matrix2[6] = matrix1[9];
+ matrix2[7] = matrix1[13];
+
+ matrix2[8] = matrix1[2];
+ matrix2[9] = matrix1[6];
+ matrix2[10] = matrix1[10];
+ matrix2[11] = matrix1[14];
+
+ matrix2[12] = matrix1[3];
+ matrix2[13] = matrix1[7];
+ matrix2[14] = matrix1[14];
+ matrix2[15] = matrix1[15];
+}
+
+/*****************************************************************/
+
+/* load SGI .rgb image (pad with a border of the specified width and color) */
+#if 0
+static void
+imgLoad(char *filenameIn, int borderIn, GLfloat borderColorIn[4],
+ int *wOut, int *hOut, GLubyte ** imgOut)
+{
+ int border = borderIn;
+ int width, height;
+ int w, h;
+ GLubyte *image, *img, *p;
+ int i, j, components;
+
+ image = (GLubyte *) read_texture(filenameIn, &width, &height, &components);
+ w = width + 2 * border;
+ h = height + 2 * border;
+ img = (GLubyte *) calloc(w * h, 4 * sizeof(unsigned char));
+
+ p = img;
+ for (j = -border; j < height + border; ++j) {
+ for (i = -border; i < width + border; ++i) {
+ if (0 <= j && j <= height - 1 && 0 <= i && i <= width - 1) {
+ p[0] = image[4 * (j * width + i) + 0];
+ p[1] = image[4 * (j * width + i) + 1];
+ p[2] = image[4 * (j * width + i) + 2];
+ p[3] = 0xff;
+ } else {
+ p[0] = borderColorIn[0] * 0xff;
+ p[1] = borderColorIn[1] * 0xff;
+ p[2] = borderColorIn[2] * 0xff;
+ p[3] = borderColorIn[3] * 0xff;
+ }
+ p += 4;
+ }
+ }
+ free(image);
+ *wOut = w;
+ *hOut = h;
+ *imgOut = img;
+}
+#endif
+
+
+/*****************************************************************/
+
+/* Load the image file specified on the command line as the current texture */
+static void
+loadImageTextures(void)
+{
+ GLfloat borderColor[4] =
+ {1.0, 1.0, 1.0, 1.0};
+ int tex;
+
+ for (tex = 0; tex < NumTextures; tex++) {
+ GLubyte *image, *texData3, *texData4;
+ GLint imgWidth, imgHeight;
+ GLenum imgFormat;
+ int i, j;
+
+ printf("loading %s\n", texFilename[tex]);
+ image = LoadRGBImage(texFilename[tex], &imgWidth, &imgHeight, &imgFormat);
+ if (!image) {
+ printf("can't find %s\n", texFilename[tex]);
+ exit(1);
+ }
+ assert(imgFormat == GL_RGB);
+
+ /* scale to 256x256 */
+ texData3 = malloc(256 * 256 * 4);
+ texData4 = malloc(256 * 256 * 4);
+ assert(texData3);
+ assert(texData4);
+ gluScaleImage(imgFormat, imgWidth, imgHeight, GL_UNSIGNED_BYTE, image,
+ 256, 256, GL_UNSIGNED_BYTE, texData3);
+
+ /* convert to rgba */
+ for (i = 0; i < 256 * 256; i++) {
+ texData4[i*4+0] = texData3[i*3+0];
+ texData4[i*4+1] = texData3[i*3+1];
+ texData4[i*4+2] = texData3[i*3+2];
+ texData4[i*4+3] = 128;
+ }
+
+ /* put transparent border around image */
+ for (i = 0; i < 256; i++) {
+ texData4[i*4+0] = 255;
+ texData4[i*4+1] = 255;
+ texData4[i*4+2] = 255;
+ texData4[i*4+3] = 0;
+ }
+ j = 256 * 255 * 4;
+ for (i = 0; i < 256; i++) {
+ texData4[j + i*4+0] = 255;
+ texData4[j + i*4+1] = 255;
+ texData4[j + i*4+2] = 255;
+ texData4[j + i*4+3] = 0;
+ }
+ for (i = 0; i < 256; i++) {
+ j = i * 256 * 4;
+ texData4[j+0] = 255;
+ texData4[j+1] = 255;
+ texData4[j+2] = 255;
+ texData4[j+3] = 0;
+ }
+ for (i = 0; i < 256; i++) {
+ j = i * 256 * 4 + 255 * 4;
+ texData4[j+0] = 255;
+ texData4[j+1] = 255;
+ texData4[j+2] = 255;
+ texData4[j+3] = 0;
+ }
+
+ ActiveTexture(GL_TEXTURE0_ARB + tex);
+ glBindTexture(GL_TEXTURE_2D, tex + 1);
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, texData4);
+
+ if (linearFilter) {
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ } else {
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ }
+ glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);
+ }
+}
+
+/* Create a simple spotlight pattern and make it the current texture */
+static void
+loadSpotlightTexture(void)
+{
+ static int texWidth = 64, texHeight = 64;
+ static GLubyte *texData;
+ GLfloat borderColor[4] =
+ {0.1, 0.1, 0.1, 1.0};
+
+ if (!texData) {
+ GLubyte *p;
+ int i, j;
+
+ texData = (GLubyte *) malloc(texWidth * texHeight * 4 * sizeof(GLubyte));
+
+ p = texData;
+ for (j = 0; j < texHeight; ++j) {
+ float dy = (texHeight * 0.5 - j + 0.5) / (texHeight * 0.5);
+
+ for (i = 0; i < texWidth; ++i) {
+ float dx = (texWidth * 0.5 - i + 0.5) / (texWidth * 0.5);
+ float r = cos(M_PI / 2.0 * sqrt(dx * dx + dy * dy));
+ float c;
+
+ r = (r < 0) ? 0 : r * r;
+ c = 0xff * (r + borderColor[0]);
+ p[0] = (c <= 0xff) ? c : 0xff;
+ c = 0xff * (r + borderColor[1]);
+ p[1] = (c <= 0xff) ? c : 0xff;
+ c = 0xff * (r + borderColor[2]);
+ p[2] = (c <= 0xff) ? c : 0xff;
+ c = 0xff * (r + borderColor[3]);
+ p[3] = (c <= 0xff) ? c : 0xff;
+ p += 4;
+ }
+ }
+ }
+ if (linearFilter) {
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ } else {
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ }
+ glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);
+ gluBuild2DMipmaps(GL_TEXTURE_2D, 4, texWidth, texHeight,
+ GL_RGBA, GL_UNSIGNED_BYTE, texData);
+}
+
+/*****************************************************************/
+
+static void
+checkErrors(void)
+{
+ GLenum error;
+ while ((error = glGetError()) != GL_NO_ERROR) {
+ fprintf(stderr, "Error: %s\n", (char *) gluErrorString(error));
+ }
+}
+
+static void
+drawCube(void)
+{
+ glBegin(GL_QUADS);
+
+ glNormal3f(-1.0, 0.0, 0.0);
+ glColor3f(0.80, 0.50, 0.50);
+ glVertex3f(-0.5, -0.5, -0.5);
+ glVertex3f(-0.5, -0.5, 0.5);
+ glVertex3f(-0.5, 0.5, 0.5);
+ glVertex3f(-0.5, 0.5, -0.5);
+
+ glNormal3f(1.0, 0.0, 0.0);
+ glColor3f(0.50, 0.80, 0.50);
+ glVertex3f(0.5, 0.5, 0.5);
+ glVertex3f(0.5, -0.5, 0.5);
+ glVertex3f(0.5, -0.5, -0.5);
+ glVertex3f(0.5, 0.5, -0.5);
+
+ glNormal3f(0.0, -1.0, 0.0);
+ glColor3f(0.50, 0.50, 0.80);
+ glVertex3f(-0.5, -0.5, -0.5);
+ glVertex3f(0.5, -0.5, -0.5);
+ glVertex3f(0.5, -0.5, 0.5);
+ glVertex3f(-0.5, -0.5, 0.5);
+
+ glNormal3f(0.0, 1.0, 0.0);
+ glColor3f(0.50, 0.80, 0.80);
+ glVertex3f(0.5, 0.5, 0.5);
+ glVertex3f(0.5, 0.5, -0.5);
+ glVertex3f(-0.5, 0.5, -0.5);
+ glVertex3f(-0.5, 0.5, 0.5);
+
+ glNormal3f(0.0, 0.0, -1.0);
+ glColor3f(0.80, 0.50, 0.80);
+ glVertex3f(-0.5, -0.5, -0.5);
+ glVertex3f(-0.5, 0.5, -0.5);
+ glVertex3f(0.5, 0.5, -0.5);
+ glVertex3f(0.5, -0.5, -0.5);
+
+ glNormal3f(0.0, 0.0, 1.0);
+ glColor3f(1.00, 0.80, 0.50);
+ glVertex3f(0.5, 0.5, 0.5);
+ glVertex3f(-0.5, 0.5, 0.5);
+ glVertex3f(-0.5, -0.5, 0.5);
+ glVertex3f(0.5, -0.5, 0.5);
+ glEnd();
+}
+
+static void
+drawDodecahedron(void)
+{
+#define A (0.5 * 1.61803) /* (sqrt(5) + 1) / 2 */
+#define B (0.5 * 0.61803) /* (sqrt(5) - 1) / 2 */
+#define C (0.5 * 1.0)
+ GLfloat vertexes[20][3] =
+ {
+ {-A, 0.0, B},
+ {-A, 0.0, -B},
+ {A, 0.0, -B},
+ {A, 0.0, B},
+ {B, -A, 0.0},
+ {-B, -A, 0.0},
+ {-B, A, 0.0},
+ {B, A, 0.0},
+ {0.0, B, -A},
+ {0.0, -B, -A},
+ {0.0, -B, A},
+ {0.0, B, A},
+ {-C, -C, C},
+ {-C, -C, -C},
+ {C, -C, -C},
+ {C, -C, C},
+ {-C, C, C},
+ {-C, C, -C},
+ {C, C, -C},
+ {C, C, C},
+ };
+#undef A
+#undef B
+#undef C
+ GLint polygons[12][5] =
+ {
+ {0, 12, 10, 11, 16},
+ {1, 17, 8, 9, 13},
+ {2, 14, 9, 8, 18},
+ {3, 19, 11, 10, 15},
+ {4, 14, 2, 3, 15},
+ {5, 12, 0, 1, 13},
+ {6, 17, 1, 0, 16},
+ {7, 19, 3, 2, 18},
+ {8, 17, 6, 7, 18},
+ {9, 14, 4, 5, 13},
+ {10, 12, 5, 4, 15},
+ {11, 19, 7, 6, 16},
+ };
+ int i;
+
+ glColor3f(0.75, 0.75, 0.75);
+ for (i = 0; i < 12; ++i) {
+ GLfloat *p0, *p1, *p2, d;
+ GLfloat u[3], v[3], n[3];
+
+ p0 = &vertexes[polygons[i][0]][0];
+ p1 = &vertexes[polygons[i][1]][0];
+ p2 = &vertexes[polygons[i][2]][0];
+
+ u[0] = p2[0] - p1[0];
+ u[1] = p2[1] - p1[1];
+ u[2] = p2[2] - p1[2];
+
+ v[0] = p0[0] - p1[0];
+ v[1] = p0[1] - p1[1];
+ v[2] = p0[2] - p1[2];
+
+ n[0] = u[1] * v[2] - u[2] * v[1];
+ n[1] = u[2] * v[0] - u[0] * v[2];
+ n[2] = u[0] * v[1] - u[1] * v[0];
+
+ d = 1.0 / sqrt(n[0] * n[0] + n[1] * n[1] + n[2] * n[2]);
+ n[0] *= d;
+ n[1] *= d;
+ n[2] *= d;
+
+ glBegin(GL_POLYGON);
+ glNormal3fv(n);
+ glVertex3fv(p0);
+ glVertex3fv(p1);
+ glVertex3fv(p2);
+ glVertex3fv(vertexes[polygons[i][3]]);
+ glVertex3fv(vertexes[polygons[i][4]]);
+ glEnd();
+ }
+}
+
+static void
+drawSphere(void)
+{
+ int numMajor = 24;
+ int numMinor = 32;
+ float radius = 0.8;
+ double majorStep = (M_PI / numMajor);
+ double minorStep = (2.0 * M_PI / numMinor);
+ int i, j;
+
+ glColor3f(0.50, 0.50, 0.50);
+ for (i = 0; i < numMajor; ++i) {
+ double a = i * majorStep;
+ double b = a + majorStep;
+ double r0 = radius * sin(a);
+ double r1 = radius * sin(b);
+ GLfloat z0 = radius * cos(a);
+ GLfloat z1 = radius * cos(b);
+
+ glBegin(GL_TRIANGLE_STRIP);
+ for (j = 0; j <= numMinor; ++j) {
+ double c = j * minorStep;
+ GLfloat x = cos(c);
+ GLfloat y = sin(c);
+
+ glNormal3f((x * r0) / radius, (y * r0) / radius, z0 / radius);
+ glTexCoord2f(j / (GLfloat) numMinor, i / (GLfloat) numMajor);
+ glVertex3f(x * r0, y * r0, z0);
+
+ glNormal3f((x * r1) / radius, (y * r1) / radius, z1 / radius);
+ glTexCoord2f(j / (GLfloat) numMinor, (i + 1) / (GLfloat) numMajor);
+ glVertex3f(x * r1, y * r1, z1);
+ }
+ glEnd();
+ }
+}
+
+/*****************************************************************/
+
+float xmin = -0.035, xmax = 0.035;
+float ymin = -0.035, ymax = 0.035;
+float nnear = 0.1;
+float ffar = 1.9;
+float distance = -1.0;
+
+static void
+loadTextureProjection(int texUnit, GLfloat m[16])
+{
+ GLfloat mInverse[4][4];
+
+ /* Should use true inverse, but since m consists only of rotations, we can
+ just use the transpose. */
+ matrixTranspose((GLfloat *) mInverse, m);
+
+ ActiveTexture(GL_TEXTURE0_ARB + texUnit);
+ glMatrixMode(GL_TEXTURE);
+ glLoadIdentity();
+ glTranslatef(0.5, 0.5, 0.0);
+ glScalef(0.5, 0.5, 1.0);
+ glFrustum(xmin, xmax, ymin, ymax, nnear, ffar);
+ glTranslatef(0.0, 0.0, distance);
+ glMultMatrixf((GLfloat *) mInverse);
+ glMatrixMode(GL_MODELVIEW);
+}
+
+static void
+drawTextureProjection(void)
+{
+ float t = ffar / nnear;
+ GLfloat n[4][3];
+ GLfloat f[4][3];
+
+ n[0][0] = xmin;
+ n[0][1] = ymin;
+ n[0][2] = -(nnear + distance);
+
+ n[1][0] = xmax;
+ n[1][1] = ymin;
+ n[1][2] = -(nnear + distance);
+
+ n[2][0] = xmax;
+ n[2][1] = ymax;
+ n[2][2] = -(nnear + distance);
+
+ n[3][0] = xmin;
+ n[3][1] = ymax;
+ n[3][2] = -(nnear + distance);
+
+ f[0][0] = xmin * t;
+ f[0][1] = ymin * t;
+ f[0][2] = -(ffar + distance);
+
+ f[1][0] = xmax * t;
+ f[1][1] = ymin * t;
+ f[1][2] = -(ffar + distance);
+
+ f[2][0] = xmax * t;
+ f[2][1] = ymax * t;
+ f[2][2] = -(ffar + distance);
+
+ f[3][0] = xmin * t;
+ f[3][1] = ymax * t;
+ f[3][2] = -(ffar + distance);
+
+ glColor3f(1.0, 1.0, 0.0);
+ glBegin(GL_LINE_LOOP);
+ glVertex3fv(n[0]);
+ glVertex3fv(n[1]);
+ glVertex3fv(n[2]);
+ glVertex3fv(n[3]);
+ glVertex3fv(f[3]);
+ glVertex3fv(f[2]);
+ glVertex3fv(f[1]);
+ glVertex3fv(f[0]);
+ glVertex3fv(n[0]);
+ glVertex3fv(n[1]);
+ glVertex3fv(f[1]);
+ glVertex3fv(f[0]);
+ glVertex3fv(f[3]);
+ glVertex3fv(f[2]);
+ glVertex3fv(n[2]);
+ glVertex3fv(n[3]);
+ glEnd();
+}
+
+/*****************************************************************/
+
+static void
+initialize(void)
+{
+ GLfloat light0Pos[4] =
+ {0.3, 0.3, 0.0, 1.0};
+ GLfloat matAmb[4] =
+ {0.01, 0.01, 0.01, 1.00};
+ GLfloat matDiff[4] =
+ {0.65, 0.65, 0.65, 1.00};
+ GLfloat matSpec[4] =
+ {0.30, 0.30, 0.30, 1.00};
+ GLfloat matShine = 10.0;
+ GLfloat eyePlaneS[] =
+ {1.0, 0.0, 0.0, 0.0};
+ GLfloat eyePlaneT[] =
+ {0.0, 1.0, 0.0, 0.0};
+ GLfloat eyePlaneR[] =
+ {0.0, 0.0, 1.0, 0.0};
+ GLfloat eyePlaneQ[] =
+ {0.0, 0.0, 0.0, 1.0};
+ int i;
+
+ /* Setup Misc. */
+ glClearColor(0.41, 0.41, 0.31, 0.0);
+
+ glEnable(GL_DEPTH_TEST);
+
+ /* glLineWidth(2.0);*/
+
+ glCullFace(GL_FRONT);
+ glEnable(GL_CULL_FACE);
+
+ glMatrixMode(GL_PROJECTION);
+ glFrustum(-0.5, 0.5, -0.5, 0.5, 1, 3);
+ glMatrixMode(GL_MODELVIEW);
+ glTranslatef(0, 0, -2);
+
+ matrixIdentity((GLfloat *) objectXform);
+ for (i = 0; i < NumTextures; i++) {
+ matrixIdentity((GLfloat *) textureXform[i]);
+ }
+
+ glMatrixMode(GL_PROJECTION);
+ glPushMatrix();
+ glLoadIdentity();
+ glOrtho(0, 1, 0, 1, -1, 1);
+ glMatrixMode(GL_MODELVIEW);
+ glPushMatrix();
+ glLoadIdentity();
+
+ glRasterPos2i(0, 0);
+
+ glPopMatrix();
+ glMatrixMode(GL_PROJECTION);
+ glPopMatrix();
+ glMatrixMode(GL_MODELVIEW);
+
+ /* Setup Lighting */
+ glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, matAmb);
+ glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, matDiff);
+ glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, matSpec);
+ glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, matShine);
+
+ glEnable(GL_COLOR_MATERIAL);
+
+ glLightfv(GL_LIGHT0, GL_POSITION, light0Pos);
+ glEnable(GL_LIGHT0);
+
+ glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
+ glEnable(GL_LIGHTING);
+
+ /* Setup Texture */
+
+ (*loadTexture) ();
+
+
+ for (i = 0; i < NumTextures; i++) {
+ ActiveTexture(GL_TEXTURE0_ARB + i);
+
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+ glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
+ glTexGenfv(GL_S, GL_EYE_PLANE, eyePlaneS);
+
+ glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
+ glTexGenfv(GL_T, GL_EYE_PLANE, eyePlaneT);
+
+ glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
+ glTexGenfv(GL_R, GL_EYE_PLANE, eyePlaneR);
+
+ glTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
+ glTexGenfv(GL_Q, GL_EYE_PLANE, eyePlaneQ);
+ }
+}
+
+static void
+display(void)
+{
+ int i;
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ if (textureEnabled) {
+ if (mode == MoveTexture || mode == MoveView) {
+ /* Have OpenGL compute the new transformation (simple but slow). */
+ for (i = 0; i < NumTextures; i++) {
+ glPushMatrix();
+ glLoadIdentity();
+#if 0
+ if (i & 1)
+ glRotatef(angle, axis[0], axis[1], axis[2]);
+ else
+#endif
+ glRotatef(angle*(i+1), axis[0], axis[1], axis[2]);
+
+ glMultMatrixf((GLfloat *) textureXform[i]);
+ glGetFloatv(GL_MODELVIEW_MATRIX, (GLfloat *) textureXform[i]);
+ glPopMatrix();
+ }
+ }
+ for (i = 0; i < NumTextures; i++) {
+ loadTextureProjection(i, (GLfloat *) textureXform[i]);
+ }
+
+ if (showProjection) {
+ for (i = 0; i < NumTextures; i++) {
+ ActiveTexture(GL_TEXTURE0_ARB + i);
+ glPushMatrix();
+ glMultMatrixf((GLfloat *) textureXform[i]);
+ glDisable(GL_LIGHTING);
+ drawTextureProjection();
+ glEnable(GL_LIGHTING);
+ glPopMatrix();
+ }
+ }
+ for (i = 0; i < NumTextures; i++) {
+ ActiveTexture(GL_TEXTURE0_ARB + i);
+ glEnable(GL_TEXTURE_2D);
+ glEnable(GL_TEXTURE_GEN_S);
+ glEnable(GL_TEXTURE_GEN_T);
+ glEnable(GL_TEXTURE_GEN_R);
+ glEnable(GL_TEXTURE_GEN_Q);
+ }
+ }
+ if (mode == MoveObject || mode == MoveView) {
+ /* Have OpenGL compute the new transformation (simple but slow). */
+ glPushMatrix();
+ glLoadIdentity();
+ glRotatef(angle, axis[0], axis[1], axis[2]);
+ glMultMatrixf((GLfloat *) objectXform);
+ glGetFloatv(GL_MODELVIEW_MATRIX, (GLfloat *) objectXform);
+ glPopMatrix();
+ }
+ glPushMatrix();
+ glMultMatrixf((GLfloat *) objectXform);
+ (*drawObject) ();
+ glPopMatrix();
+
+ for (i = 0; i < NumTextures; i++) {
+ ActiveTexture(GL_TEXTURE0_ARB + i);
+ glDisable(GL_TEXTURE_2D);
+ glDisable(GL_TEXTURE_GEN_S);
+ glDisable(GL_TEXTURE_GEN_T);
+ glDisable(GL_TEXTURE_GEN_R);
+ glDisable(GL_TEXTURE_GEN_Q);
+ }
+
+ if (zoomFactor > 1.0) {
+ glDisable(GL_DEPTH_TEST);
+ glCopyPixels(0, 0, winWidth / zoomFactor, winHeight / zoomFactor, GL_COLOR);
+ glEnable(GL_DEPTH_TEST);
+ }
+ glFlush();
+ glutSwapBuffers();
+ checkErrors();
+}
+
+/*****************************************************************/
+
+/* simple trackball-like motion control */
+static float lastPos[3];
+static int lastTime;
+
+static void
+ptov(int x, int y, int width, int height, float v[3])
+{
+ float d, a;
+
+ /* project x,y onto a hemi-sphere centered within width, height */
+ v[0] = (2.0 * x - width) / width;
+ v[1] = (height - 2.0 * y) / height;
+ d = sqrt(v[0] * v[0] + v[1] * v[1]);
+ v[2] = cos((M_PI / 2.0) * ((d < 1.0) ? d : 1.0));
+ a = 1.0 / sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
+ v[0] *= a;
+ v[1] *= a;
+ v[2] *= a;
+}
+
+static void
+startMotion(int x, int y, int but, int time)
+{
+ if (but == GLUT_LEFT_BUTTON) {
+ mode = MoveView;
+ } else if (but == GLUT_MIDDLE_BUTTON) {
+ mode = MoveTexture;
+ } else {
+ return;
+ }
+
+ lastTime = time;
+ ptov(x, y, winWidth, winHeight, lastPos);
+}
+
+static void
+animate(void)
+{
+ glutPostRedisplay();
+}
+
+static void
+vis(int visible)
+{
+ if (visible == GLUT_VISIBLE) {
+ if (redrawContinuously)
+ glutIdleFunc(animate);
+ } else {
+ if (redrawContinuously)
+ glutIdleFunc(NULL);
+ }
+}
+
+static void
+stopMotion(int but, int time)
+{
+ if ((but == GLUT_LEFT_BUTTON && mode == MoveView) ||
+ (but == GLUT_MIDDLE_BUTTON && mode == MoveTexture)) {
+ } else {
+ return;
+ }
+
+ if (time == lastTime) {
+ /* redrawContinuously = GL_TRUE;*/
+ glutIdleFunc(animate);
+ } else {
+ angle = 0.0;
+ redrawContinuously = GL_FALSE;
+ glutIdleFunc(0);
+ }
+ if (!redrawContinuously) {
+ mode = MoveNone;
+ }
+}
+
+static void
+trackMotion(int x, int y)
+{
+ float curPos[3], dx, dy, dz;
+
+ ptov(x, y, winWidth, winHeight, curPos);
+
+ dx = curPos[0] - lastPos[0];
+ dy = curPos[1] - lastPos[1];
+ dz = curPos[2] - lastPos[2];
+ angle = 90.0 * sqrt(dx * dx + dy * dy + dz * dz);
+
+ axis[0] = lastPos[1] * curPos[2] - lastPos[2] * curPos[1];
+ axis[1] = lastPos[2] * curPos[0] - lastPos[0] * curPos[2];
+ axis[2] = lastPos[0] * curPos[1] - lastPos[1] * curPos[0];
+
+ lastTime = glutGet(GLUT_ELAPSED_TIME);
+ lastPos[0] = curPos[0];
+ lastPos[1] = curPos[1];
+ lastPos[2] = curPos[2];
+ glutPostRedisplay();
+}
+
+/*****************************************************************/
+
+static void
+object(void)
+{
+ static int object;
+
+ object++;
+ object %= 3;
+ switch (object) {
+ case 0:
+ drawObject = drawCube;
+ break;
+ case 1:
+ drawObject = drawDodecahedron;
+ break;
+ case 2:
+ drawObject = drawSphere;
+ break;
+ default:
+ break;
+ }
+}
+
+static void
+nop(void)
+{
+}
+
+static void
+texture(void)
+{
+ static int texture = 0;
+
+ texture++;
+ texture %= 3;
+ if (texture == 1 && texFilename == NULL) {
+ /* Skip file texture if not loaded. */
+ texture++;
+ }
+ switch (texture) {
+ case 0:
+ loadTexture = nop;
+ textureEnabled = GL_FALSE;
+ break;
+ case 1:
+ loadTexture = loadImageTextures;
+ (*loadTexture) ();
+ textureEnabled = GL_TRUE;
+ break;
+ case 2:
+ loadTexture = loadSpotlightTexture;
+ (*loadTexture) ();
+ textureEnabled = GL_TRUE;
+ break;
+ default:
+ break;
+ }
+}
+
+static void
+help(void)
+{
+ printf("'h' - help\n");
+ printf("'l' - toggle linear/nearest filter\n");
+ printf("'s' - toggle projection frustum\n");
+ printf("'t' - toggle projected texture\n");
+ printf("'o' - toggle object\n");
+ printf("'z' - increase zoom factor\n");
+ printf("'Z' - decrease zoom factor\n");
+ printf("left mouse - move view\n");
+ printf("middle mouse - move projection\n");
+}
+
+/* ARGSUSED1 */
+static void
+key(unsigned char key, int x, int y)
+{
+ switch (key) {
+ case '\033':
+ exit(0);
+ break;
+ case 'l':
+ linearFilter = !linearFilter;
+ (*loadTexture) ();
+ break;
+ case 's':
+ showProjection = !showProjection;
+ break;
+ case 't':
+ texture();
+ break;
+ case 'o':
+ object();
+ break;
+ case 'z':
+ zoomFactor += 1.0;
+ glPixelZoom(zoomFactor, zoomFactor);
+ glViewport(0, 0, winWidth / zoomFactor, winHeight / zoomFactor);
+ break;
+ case 'Z':
+ zoomFactor -= 1.0;
+ if (zoomFactor < 1.0)
+ zoomFactor = 1.0;
+ glPixelZoom(zoomFactor, zoomFactor);
+ glViewport(0, 0, winWidth / zoomFactor, winHeight / zoomFactor);
+ break;
+ case 'h':
+ help();
+ break;
+ }
+ glutPostRedisplay();
+}
+
+static void
+mouse(int button, int state, int x, int y)
+{
+ if (state == GLUT_DOWN)
+ startMotion(x, y, button, glutGet(GLUT_ELAPSED_TIME));
+ else if (state == GLUT_UP)
+ stopMotion(button, glutGet(GLUT_ELAPSED_TIME));
+ glutPostRedisplay();
+}
+
+static void
+reshape(int w, int h)
+{
+ winWidth = w;
+ winHeight = h;
+ glViewport(0, 0, w / zoomFactor, h / zoomFactor);
+}
+
+
+static void
+menu(int selection)
+{
+ if (selection == 666) {
+ exit(0);
+ }
+ key((unsigned char) selection, 0, 0);
+}
+
+int
+main(int argc, char **argv)
+{
+ glutInit(&argc, argv);
+
+ if (argc > 1) {
+ NumTextures = atoi(argv[1]);
+ }
+ assert(NumTextures <= MAX_TEX);
+
+ glutInitDisplayMode(GLUT_RGBA | GLUT_DEPTH | GLUT_DOUBLE);
+ glutInitWindowSize(500,500);
+ (void) glutCreateWindow("projtex");
+ glewInit();
+
+ loadTexture = loadImageTextures;
+ drawObject = drawCube;
+ initialize();
+ glutDisplayFunc(display);
+ glutKeyboardFunc(key);
+ glutReshapeFunc(reshape);
+ glutMouseFunc(mouse);
+ glutMotionFunc(trackMotion);
+ glutVisibilityFunc(vis);
+ glutCreateMenu(menu);
+ glutAddMenuEntry("Toggle showing projection", 's');
+ glutAddMenuEntry("Switch texture", 't');
+ glutAddMenuEntry("Switch object", 'o');
+ glutAddMenuEntry("Toggle filtering", 'l');
+ glutAddMenuEntry("Quit", 666);
+ glutAttachMenu(GLUT_RIGHT_BUTTON);
+ texture();
+ glutMainLoop();
+ return 0; /* ANSI C requires main to return int. */
+}
diff --git a/progs/demos/readpix.c b/progs/demos/readpix.c
index c0aac2272f..bbb3a68eff 100644
--- a/progs/demos/readpix.c
+++ b/progs/demos/readpix.c
@@ -17,6 +17,7 @@
#define IMAGE_FILE "../images/girl.rgb"
static int ImgWidth, ImgHeight;
+static int WinWidth, WinHeight;
static GLenum ImgFormat;
static GLubyte *Image = NULL;
@@ -27,6 +28,7 @@ static int CPosX, CPosY; /* copypixels */
static GLboolean DrawFront = GL_FALSE;
static GLboolean ScaleAndBias = GL_FALSE;
static GLboolean Benchmark = GL_FALSE;
+static GLboolean Triangle = GL_FALSE;
static GLubyte *TempImage = NULL;
#define COMBO 1
@@ -150,11 +152,60 @@ Display( void )
/* draw original image */
glRasterPos2i(APosX, 5);
PrintString("Original");
- glRasterPos2i(APosX, APosY);
- glEnable(GL_DITHER);
- SetupPixelTransfer(GL_FALSE);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glDrawPixels(ImgWidth, ImgHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);
+ if (!Triangle) {
+ glRasterPos2i(APosX, APosY);
+ glEnable(GL_DITHER);
+ SetupPixelTransfer(GL_FALSE);
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glDrawPixels(ImgWidth, ImgHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);
+ }
+ else {
+ float z = 0;
+
+ glViewport(APosX, APosY, ImgWidth, ImgHeight);
+ glMatrixMode( GL_PROJECTION );
+ glLoadIdentity();
+ glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
+ glDisable(GL_CULL_FACE);
+
+ /* Red should never be seen
+ */
+ glBegin(GL_POLYGON);
+ glColor3f(1,0,0);
+ glVertex3f(-2, -2, z);
+ glVertex3f(-2, 2, z);
+ glVertex3f(2, 2, z);
+ glVertex3f(2, -2, z);
+ glEnd();
+
+ /* Blue background
+ */
+ glBegin(GL_POLYGON);
+ glColor3f(.5,.5,1);
+ glVertex3f(-1, -1, z);
+ glVertex3f(-1, 1, z);
+ glVertex3f(1, 1, z);
+ glVertex3f(1, -1, z);
+ glEnd();
+
+ /* Triangle
+ */
+ glBegin(GL_TRIANGLES);
+ glColor3f(.8,0,0);
+ glVertex3f(-0.9, -0.9, z);
+ glColor3f(0,.9,0);
+ glVertex3f( 0.9, -0.9, z);
+ glColor3f(0,0,.7);
+ glVertex3f( 0.0, 0.9, z);
+ glEnd();
+
+ glColor3f(1,1,1);
+
+ glViewport( 0, 0, WinWidth, WinHeight );
+ glMatrixMode( GL_PROJECTION );
+ glLoadIdentity();
+ glOrtho( 0.0, WinWidth, 0.0, WinHeight, -1.0, 1.0 );
+ }
/* might try alignment=4 here for testing */
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
@@ -218,6 +269,9 @@ Display( void )
static void
Reshape( int width, int height )
{
+ WinWidth = width;
+ WinHeight = height;
+
glViewport( 0, 0, width, height );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
@@ -236,6 +290,9 @@ Key( unsigned char key, int x, int y )
case 'b':
Benchmark = GL_TRUE;
break;
+ case 't':
+ Triangle = !Triangle;
+ break;
case 's':
ScaleAndBias = !ScaleAndBias;
break;
diff --git a/progs/demos/shadowtex.c b/progs/demos/shadowtex.c
index f10a01ec26..dc5a4bbc48 100644
--- a/progs/demos/shadowtex.c
+++ b/progs/demos/shadowtex.c
@@ -788,6 +788,7 @@ Key(unsigned char key, int x, int y)
exit(0);
break;
}
+ fflush(stdout);
glutPostRedisplay();
}
@@ -1014,6 +1015,7 @@ PrintHelp(void)
printf(" <shift> + cursor keys = rotate light source\n");
if (HaveEXTshadowFuncs)
printf(" o = cycle through comparison modes\n");
+ fflush(stdout);
}
diff --git a/progs/demos/streaming_rect.c b/progs/demos/streaming_rect.c
deleted file mode 100644
index f65ac4ce36..0000000000
--- a/progs/demos/streaming_rect.c
+++ /dev/null
@@ -1,327 +0,0 @@
-/*
- * GL_ARB_pixel_buffer_object test
- *
- * Command line options:
- * -w WIDTH -h HEIGHT sets window size
- *
- */
-
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <GL/glew.h>
-#include <GL/glut.h>
-
-#include "readtex.h"
-
-
-#define ANIMATE 10
-#define PBO 11
-#define QUIT 100
-
-static GLuint DrawPBO;
-
-static GLboolean Animate = GL_TRUE;
-static GLboolean use_pbo = 1;
-static GLboolean whole_rect = 1;
-
-static GLfloat Drift = 0.0;
-static GLfloat drift_increment = 1/255.0;
-static GLfloat Xrot = 20.0, Yrot = 30.0;
-
-static GLuint Width = 1024;
-static GLuint Height = 512;
-
-
-static void Idle( void )
-{
- if (Animate) {
-
- Drift += drift_increment;
- if (Drift >= 1.0)
- Drift = 0.0;
-
- glutPostRedisplay();
- }
-}
-
-/*static int max( int a, int b ) { return a > b ? a : b; }*/
-
-#ifndef min
-static int min( int a, int b ) { return a < b ? a : b; }
-#endif
-
-static void DrawObject()
-{
- GLint size = Width * Height * 4;
-
- if (use_pbo) {
- /* XXX: This is extremely important - semantically makes the buffer
- * contents undefined, but in practice means that the driver can
- * release the old copy of the texture and allocate a new one
- * without waiting for outstanding rendering to complete.
- */
- glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, DrawPBO);
- glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_EXT, size, NULL, GL_STREAM_DRAW_ARB);
-
- {
- char *image = glMapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, GL_WRITE_ONLY_ARB);
-
- printf("char %d\n", (unsigned char)(Drift * 255));
-
- memset(image, (unsigned char)(Drift * 255), size);
-
- glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT);
- }
-
-
- /* BGRA is required for most hardware paths:
- */
- glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, Width, Height, 0,
- GL_BGRA, GL_UNSIGNED_BYTE, NULL);
- }
- else {
- static char *image = NULL;
-
- if (image == NULL)
- image = malloc(size);
-
- glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, 0);
-
- memset(image, (unsigned char)(Drift * 255), size);
-
- /* BGRA should be the fast path for regular uploads as well.
- */
- glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, Width, Height, 0,
- GL_BGRA, GL_UNSIGNED_BYTE, image);
- }
-
- {
- int x,y,w,h;
-
- if (whole_rect) {
- x = y = 0;
- w = Width;
- h = Height;
- }
- else {
- x = y = 0;
- w = min(10, Width);
- h = min(10, Height);
- }
-
- glBegin(GL_QUADS);
-
- glTexCoord2f( x, y);
- glVertex2f( x, y );
-
- glTexCoord2f( x, y + h);
- glVertex2f( x, y + h);
-
- glTexCoord2f( x + w + .5, y + h);
- glVertex2f( x + w, y + h );
-
- glTexCoord2f( x + w, y + .5);
- glVertex2f( x + w, y );
-
- glEnd();
- }
-}
-
-
-
-static void Display( void )
-{
- static GLint T0 = 0;
- static GLint Frames = 0;
- GLint t;
-
- glClear( GL_COLOR_BUFFER_BIT );
-
- glPushMatrix();
- DrawObject();
- glPopMatrix();
-
- glutSwapBuffers();
-
- Frames++;
-
- t = glutGet(GLUT_ELAPSED_TIME);
- if (t - T0 >= 1000) {
- GLfloat seconds = (t - T0) / 1000.0;
-
- GLfloat fps = Frames / seconds;
- printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps);
- fflush(stdout);
-
- drift_increment = 2.2 * seconds / Frames;
- T0 = t;
- Frames = 0;
- }
-}
-
-
-static void Reshape( int width, int height )
-{
- glViewport( 0, 0, width, height );
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
-/* glFrustum( -1.0, 1.0, -1.0, 1.0, 10.0, 100.0 ); */
- gluOrtho2D( 0, width, height, 0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
- glTranslatef(0.375, 0.375, 0);
-}
-
-
-static void ModeMenu(int entry)
-{
- if (entry==ANIMATE) {
- Animate = !Animate;
- }
- else if (entry==PBO) {
- use_pbo = !use_pbo;
- }
- else if (entry==QUIT) {
- exit(0);
- }
-
- glutPostRedisplay();
-}
-
-
-static void Key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case 27:
- exit(0);
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void SpecialKey( int key, int x, int y )
-{
- float step = 3.0;
- (void) x;
- (void) y;
-
- switch (key) {
- case GLUT_KEY_UP:
- Xrot += step;
- break;
- case GLUT_KEY_DOWN:
- Xrot -= step;
- break;
- case GLUT_KEY_LEFT:
- Yrot += step;
- break;
- case GLUT_KEY_RIGHT:
- Yrot -= step;
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void Init( int argc, char *argv[] )
-{
- const char *exten = (const char *) glGetString(GL_EXTENSIONS);
- GLuint texObj;
- GLint size;
-
-
- if (!strstr(exten, "GL_ARB_pixel_buffer_object")) {
- printf("Sorry, GL_ARB_pixel_buffer_object not supported by this renderer.\n");
- exit(1);
- }
-
- glGetIntegerv(GL_MAX_TEXTURE_SIZE, &size);
- printf("%d x %d max texture size\n", size, size);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-
- /* allocate two texture objects */
- glGenTextures(1, &texObj);
-
- /* setup the texture objects */
- glActiveTextureARB(GL_TEXTURE0_ARB);
- glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texObj);
-
- glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-
- glGenBuffersARB(1, &DrawPBO);
-
- glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, DrawPBO);
- glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_EXT,
- Width * Height * 4, NULL, GL_STREAM_DRAW);
-
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-
- glEnable(GL_TEXTURE_RECTANGLE_ARB);
-
- glShadeModel(GL_SMOOTH);
- glClearColor(0.3, 0.3, 0.4, 1.0);
-
- if (argc > 1 && strcmp(argv[1], "-info")==0) {
- printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
- printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
- printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
- printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
- }
-}
-
-
-int main( int argc, char *argv[] )
-{
- GLint i;
-
- glutInit( &argc, argv );
-
- for (i = 1; i < argc; i++) {
- if (strcmp(argv[i], "-w") == 0) {
- Width = atoi(argv[i+1]);
- if (Width <= 0) {
- printf("Error, bad width\n");
- exit(1);
- }
- i++;
- }
- else if (strcmp(argv[i], "-h") == 0) {
- Height = atoi(argv[i+1]);
- if (Height <= 0) {
- printf("Error, bad height\n");
- exit(1);
- }
- i++;
- }
- }
-
- glutInitWindowSize( Width, Height );
- glutInitWindowPosition( 0, 0 );
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
- glutCreateWindow(argv[0] );
- glewInit();
-
- Init( argc, argv );
-
- glutReshapeFunc( Reshape );
- glutKeyboardFunc( Key );
- glutSpecialFunc( SpecialKey );
- glutDisplayFunc( Display );
- glutIdleFunc( Idle );
-
- glutCreateMenu(ModeMenu);
- glutAddMenuEntry("Toggle Animation", ANIMATE);
- glutAddMenuEntry("Toggle PBO", PBO);
- glutAddMenuEntry("Quit", QUIT);
- glutAttachMenu(GLUT_RIGHT_BUTTON);
-
- glutMainLoop();
- return 0;
-}
diff --git a/progs/demos/teapot.c b/progs/demos/teapot.c
index 38ede7ac3e..6bf6e06409 100644
--- a/progs/demos/teapot.c
+++ b/progs/demos/teapot.c
@@ -173,10 +173,20 @@ static void special(int k, int x, int y)
}
}
+static void cleanup(void)
+{
+ glDeleteTextures(1, &t1id);
+ glDeleteTextures(1, &t2id);
+ glDeleteLists(teapotdlist, 1);
+ glDeleteLists(basedlist, 1);
+ glDeleteLists(lightdlist, 1);
+}
+
static void key(unsigned char k, int x, int y)
{
switch(k) {
case 27:
+ cleanup();
exit(0);
break;
@@ -670,6 +680,7 @@ int main(int ac, char **av)
glutIdleFunc(draw);
glutMainLoop();
+ cleanup();
return 0;
}
diff --git a/progs/demos/texdown.c b/progs/demos/texdown.c
deleted file mode 100644
index 7e46045832..0000000000
--- a/progs/demos/texdown.c
+++ /dev/null
@@ -1,477 +0,0 @@
-
-/*
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-/*
- * texdown
- *
- * Measure texture download speed.
- * Use keyboard to change texture size, format, datatype, scale/bias,
- * subimageload, etc.
- *
- * Brian Paul 28 January 2000
- */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <GL/glut.h>
-
-
-static GLsizei MaxSize = 2048;
-static GLsizei TexWidth = 1024, TexHeight = 1024, TexBorder = 0;
-static GLboolean ScaleAndBias = GL_FALSE;
-static GLboolean SubImage = GL_FALSE;
-static GLdouble DownloadRate = 0.0; /* texels/sec */
-
-static GLuint Mode = 0;
-
-
-/* Try and avoid L2 cache effects by cycling through a small number of
- * textures.
- *
- * At the initial size of 1024x1024x4 == 4mbyte, say 8 textures will
- * keep us out of most caches at 32mb total.
- *
- * This turns into a fairly interesting question of what exactly you
- * expect to be in cache in normal usage, and what you think should be
- * outside. There's no rules for this, no reason to favour one usage
- * over another except what the application you care about happens to
- * resemble most closely.
- *
- * - Should the client texture image be in L2 cache? Has it just been
- * generated or read from disk?
- * - Does the application really use >1 texture, or is it constantly
- * updating one image in-place?
- *
- * Different answers will favour different texture upload mechanisms.
- * To upload an image that is purely outside of cache, a DMA-based
- * upload will probably win, whereas for small, in-cache textures,
- * copying looks good.
- */
-#define NR_TEXOBJ 4
-static GLuint TexObj[NR_TEXOBJ];
-
-
-struct FormatRec {
- GLenum Format;
- GLenum Type;
- GLenum IntFormat;
- GLint TexelSize;
-};
-
-
-static const struct FormatRec FormatTable[] = {
- /* Format Type IntFormat TexelSize */
- { GL_BGRA, GL_UNSIGNED_BYTE, GL_RGBA, 4 },
- { GL_RGB, GL_UNSIGNED_BYTE, GL_RGB, 3 },
- { GL_RGBA, GL_UNSIGNED_BYTE, GL_RGBA, 4 },
- { GL_RGBA, GL_UNSIGNED_BYTE, GL_RGB, 4 },
- { GL_RGB, GL_UNSIGNED_SHORT_5_6_5, GL_RGB, 2 },
- { GL_LUMINANCE, GL_UNSIGNED_BYTE, GL_LUMINANCE, 1 },
- { GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, GL_LUMINANCE_ALPHA, 2 },
- { GL_ALPHA, GL_UNSIGNED_BYTE, GL_ALPHA, 1 },
-};
-static GLint Format;
-
-#define NUM_FORMATS (sizeof(FormatTable)/sizeof(FormatTable[0]))
-
-static int
-BytesPerTexel(GLint format)
-{
- return FormatTable[format].TexelSize;
-}
-
-
-static const char *
-FormatStr(GLenum format)
-{
- switch (format) {
- case GL_RGB:
- return "GL_RGB";
- case GL_RGBA:
- return "GL_RGBA";
- case GL_BGRA:
- return "GL_BGRA";
- case GL_LUMINANCE:
- return "GL_LUMINANCE";
- case GL_LUMINANCE_ALPHA:
- return "GL_LUMINANCE_ALPHA";
- case GL_ALPHA:
- return "GL_ALPHA";
- default:
- return "";
- }
-}
-
-
-static const char *
-TypeStr(GLenum type)
-{
- switch (type) {
- case GL_UNSIGNED_BYTE:
- return "GL_UNSIGNED_BYTE";
- case GL_UNSIGNED_SHORT:
- return "GL_UNSIGNED_SHORT";
- case GL_UNSIGNED_SHORT_5_6_5:
- return "GL_UNSIGNED_SHORT_5_6_5";
- case GL_UNSIGNED_SHORT_5_6_5_REV:
- return "GL_UNSIGNED_SHORT_5_6_5_REV";
- default:
- return "";
- }
-}
-
-/* On x86, there is a performance cliff for memcpy to texture memory
- * for sources below 64 byte alignment. We do our best with this in
- * the driver, but it is better if the images are correctly aligned to
- * start with:
- */
-#define ALIGN (1<<12)
-
-static unsigned long align(unsigned long value, unsigned long a)
-{
- return (value + a - 1) & ~(a-1);
-}
-
-static void
-MeasureDownloadRate(void)
-{
- const int w = TexWidth + 2 * TexBorder;
- const int h = TexHeight + 2 * TexBorder;
- const int image_bytes = align(w * h * BytesPerTexel(Format), ALIGN);
- const int bytes = image_bytes * NR_TEXOBJ;
- GLubyte *orig_texImage, *orig_getImage;
- GLubyte *texImage, *getImage;
- GLdouble t0, t1, time;
- int count;
- int i;
- int offset = 0;
- GLdouble total = 0; /* ints will tend to overflow */
-
- printf("allocating %d bytes for %d %dx%d images\n",
- bytes, NR_TEXOBJ, w, h);
-
- orig_texImage = (GLubyte *) malloc(bytes + ALIGN);
- orig_getImage = (GLubyte *) malloc(image_bytes + ALIGN);
- if (!orig_texImage || !orig_getImage) {
- DownloadRate = 0.0;
- return;
- }
-
- printf("alloc %p %p\n", orig_texImage, orig_getImage);
-
- texImage = (GLubyte *)align((unsigned long)orig_texImage, ALIGN);
- getImage = (GLubyte *)align((unsigned long)orig_getImage, ALIGN);
-
- for (i = 1; !(((unsigned long)texImage) & i); i<<=1)
- ;
- printf("texture image alignment: %d bytes (%p)\n", i, texImage);
-
- for (i = 0; i < bytes; i++) {
- texImage[i] = i & 0xff;
- }
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
-
- if (ScaleAndBias) {
- glPixelTransferf(GL_RED_SCALE, 0.5);
- glPixelTransferf(GL_GREEN_SCALE, 0.5);
- glPixelTransferf(GL_BLUE_SCALE, 0.5);
- glPixelTransferf(GL_RED_BIAS, 0.5);
- glPixelTransferf(GL_GREEN_BIAS, 0.5);
- glPixelTransferf(GL_BLUE_BIAS, 0.5);
- }
- else {
- glPixelTransferf(GL_RED_SCALE, 1.0);
- glPixelTransferf(GL_GREEN_SCALE, 1.0);
- glPixelTransferf(GL_BLUE_SCALE, 1.0);
- glPixelTransferf(GL_RED_BIAS, 0.0);
- glPixelTransferf(GL_GREEN_BIAS, 0.0);
- glPixelTransferf(GL_BLUE_BIAS, 0.0);
- }
-
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glEnable(GL_TEXTURE_2D);
-
- count = 0;
- t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
- do {
- int img = count%NR_TEXOBJ;
- GLubyte *img_ptr = texImage + img * image_bytes;
-
- glBindTexture(GL_TEXTURE_2D, TexObj[img]);
-
- if (SubImage && count > 0) {
- /* Only update a portion of the image each iteration. This
- * is presumably why you'd want to use texsubimage, otherwise
- * you may as well just call teximage again.
- *
- * A bigger question is whether to use a pointer that moves
- * with each call, ie does the incoming data come from L2
- * cache under normal circumstances, or is it pulled from
- * uncached memory?
- *
- * There's a good argument to say L2 cache, ie you'd expect
- * the data to have been recently generated. It's possible
- * that it could have come from a file read, which may or may
- * not have gone through the cpu.
- */
- glTexSubImage2D(GL_TEXTURE_2D, 0,
- -TexBorder,
- -TexBorder + offset * h/8,
- w,
- h/8,
- FormatTable[Format].Format,
- FormatTable[Format].Type,
-#if 1
- texImage /* likely in L2$ */
-#else
- img_ptr + offset * bytes/8 /* unlikely in L2$ */
-#endif
- );
- offset += 1;
- offset %= 8;
- total += w * h / 8;
- }
- else {
- glTexImage2D(GL_TEXTURE_2D, 0,
- FormatTable[Format].IntFormat, w, h, TexBorder,
- FormatTable[Format].Format,
- FormatTable[Format].Type,
- img_ptr);
- total += w*h;
- }
-
- /* draw a tiny polygon to force texture into texram */
- glBegin(GL_TRIANGLES);
- glTexCoord2f(0, 0); glVertex2f(1, 1);
- glTexCoord2f(1, 0); glVertex2f(3, 1);
- glTexCoord2f(0.5, 1); glVertex2f(2, 3);
- glEnd();
-
- t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
- time = t1 - t0;
- count++;
- } while (time < 3.0);
-
- glDisable(GL_TEXTURE_2D);
-
- printf("total texels=%f time=%f\n", total, time);
- DownloadRate = total / time;
-
-
- free(orig_texImage);
- free(orig_getImage);
-
- {
- GLint err = glGetError();
- if (err)
- printf("GL error %d\n", err);
- }
-}
-
-
-static void
-PrintString(const char *s)
-{
- while (*s) {
- glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
- s++;
- }
-}
-
-
-static void
-Display(void)
-{
- const int w = TexWidth + 2 * TexBorder;
- const int h = TexHeight + 2 * TexBorder;
- char s[1000];
-
- glClear(GL_COLOR_BUFFER_BIT);
-
- glRasterPos2i(10, 80);
- sprintf(s, "Texture size[cursor]: %d x %d Border[b]: %d", w, h, TexBorder);
- PrintString(s);
-
- glRasterPos2i(10, 65);
- sprintf(s, "Format[f]: %s Type: %s IntFormat: %s",
- FormatStr(FormatTable[Format].Format),
- TypeStr( FormatTable[Format].Type),
- FormatStr(FormatTable[Format].IntFormat));
- PrintString(s);
-
- glRasterPos2i(10, 50);
- sprintf(s, "Pixel Scale&Bias[p]: %s TexSubImage[s]: %s",
- ScaleAndBias ? "Yes" : "No",
- SubImage ? "Yes" : "No");
- PrintString(s);
-
- if (Mode == 0) {
- glRasterPos2i(200, 10);
- sprintf(s, "...Measuring...");
- PrintString(s);
- glutSwapBuffers();
- glutPostRedisplay();
- Mode++;
- }
- else if (Mode == 1) {
- MeasureDownloadRate();
- glutPostRedisplay();
- Mode++;
- }
- else {
- /* show results */
- glRasterPos2i(10, 10);
- sprintf(s, "Download rate: %g Mtexels/second %g MB/second",
- DownloadRate / 1000000.0,
- DownloadRate * BytesPerTexel(Format) / 1000000.0);
- PrintString(s);
- {
- GLint r, g, b, a, l, i;
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_RED_SIZE, &r);
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_GREEN_SIZE, &g);
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BLUE_SIZE, &b);
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &a);
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_LUMINANCE_SIZE, &l);
- glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTENSITY_SIZE, &i);
- sprintf(s, "TexelBits: R=%d G=%d B=%d A=%d L=%d I=%d", r, g, b, a, l, i);
- glRasterPos2i(10, 25);
- PrintString(s);
- }
-
- glutSwapBuffers();
- }
-}
-
-
-static void
-Reshape(int width, int height)
-{
- glViewport( 0, 0, width, height );
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- glOrtho(0, width, 0, height, -1, 1);
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
-}
-
-
-
-static void
-Key(unsigned char key, int x, int y)
-{
- (void) x;
- (void) y;
- switch (key) {
- case ' ':
- Mode = 0;
- break;
- case 'b':
- /* toggle border */
- TexBorder = 1 - TexBorder;
- Mode = 0;
- break;
- case 'f':
- /* change format */
- Format = (Format + 1) % NUM_FORMATS;
- Mode = 0;
- break;
- case 'F':
- /* change format */
- Format = (Format - 1) % NUM_FORMATS;
- Mode = 0;
- break;
- case 'p':
- /* toggle border */
- ScaleAndBias = !ScaleAndBias;
- Mode = 0;
- break;
- case 's':
- SubImage = !SubImage;
- Mode = 0;
- break;
- case 27:
- exit(0);
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void
-SpecialKey(int key, int x, int y)
-{
- (void) x;
- (void) y;
- switch (key) {
- case GLUT_KEY_UP:
- if (TexHeight < MaxSize)
- TexHeight *= 2;
- break;
- case GLUT_KEY_DOWN:
- if (TexHeight > 1)
- TexHeight /= 2;
- break;
- case GLUT_KEY_LEFT:
- if (TexWidth > 1)
- TexWidth /= 2;
- break;
- case GLUT_KEY_RIGHT:
- if (TexWidth < MaxSize)
- TexWidth *= 2;
- break;
- }
- Mode = 0;
- glutPostRedisplay();
-}
-
-
-static void
-Init(void)
-{
- printf("GL_VENDOR = %s\n", (const char *) glGetString(GL_VENDOR));
- printf("GL_VERSION = %s\n", (const char *) glGetString(GL_VERSION));
- printf("GL_RENDERER = %s\n", (const char *) glGetString(GL_RENDERER));
-}
-
-
-int
-main(int argc, char *argv[])
-{
- glutInit( &argc, argv );
- glutInitWindowPosition( 0, 0 );
- glutInitWindowSize( 600, 100 );
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
- glutCreateWindow(argv[0]);
- glutReshapeFunc( Reshape );
- glutKeyboardFunc( Key );
- glutSpecialFunc( SpecialKey );
- glutDisplayFunc( Display );
- Init();
- glutMainLoop();
- return 0;
-}
diff --git a/progs/demos/texobj.c b/progs/demos/texobj.c
deleted file mode 100644
index 40bce6e569..0000000000
--- a/progs/demos/texobj.c
+++ /dev/null
@@ -1,284 +0,0 @@
-
-/*
- * Example of using the 1.1 texture object functions.
- * Also, this demo utilizes Mesa's fast texture map path.
- *
- * Brian Paul June 1996 This file is in the public domain.
- */
-
-#include <assert.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "GL/glut.h"
-
-static GLuint Window = 0;
-
-static GLuint TexObj[2];
-static GLfloat Angle = 0.0f;
-static GLboolean UseObj = GL_FALSE;
-
-
-#if defined(GL_VERSION_1_1) || defined(GL_VERSION_1_2)
-# define TEXTURE_OBJECT 1
-#elif defined(GL_EXT_texture_object)
-# define TEXTURE_OBJECT 1
-# define glBindTexture(A,B) glBindTextureEXT(A,B)
-# define glGenTextures(A,B) glGenTexturesEXT(A,B)
-# define glDeleteTextures(A,B) glDeleteTexturesEXT(A,B)
-#endif
-
-
-
-
-static void draw( void )
-{
- glClear( GL_COLOR_BUFFER_BIT );
-
- glColor3f( 1.0, 1.0, 1.0 );
-
- /* draw first polygon */
- glPushMatrix();
- glTranslatef( -1.0, 0.0, 0.0 );
- glRotatef( Angle, 0.0, 0.0, 1.0 );
- if (UseObj) {
-#ifdef TEXTURE_OBJECT
- glBindTexture( GL_TEXTURE_2D, TexObj[0] );
-#endif
- }
- else {
- glCallList( TexObj[0] );
- }
- glBegin( GL_POLYGON );
- glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, -1.0 );
- glTexCoord2f( 1.0, 0.0 ); glVertex2f( 1.0, -1.0 );
- glTexCoord2f( 1.0, 1.0 ); glVertex2f( 1.0, 1.0 );
- glTexCoord2f( 0.0, 1.0 ); glVertex2f( -1.0, 1.0 );
- glEnd();
- glPopMatrix();
-
- /* draw second polygon */
- glPushMatrix();
- glTranslatef( 1.0, 0.0, 0.0 );
- glRotatef( Angle-90.0, 0.0, 1.0, 0.0 );
- if (UseObj) {
-#ifdef TEXTURE_OBJECT
- glBindTexture( GL_TEXTURE_2D, TexObj[1] );
-#endif
- }
- else {
- glCallList( TexObj[1] );
- }
- glBegin( GL_POLYGON );
- glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, -1.0 );
- glTexCoord2f( 1.0, 0.0 ); glVertex2f( 1.0, -1.0 );
- glTexCoord2f( 1.0, 1.0 ); glVertex2f( 1.0, 1.0 );
- glTexCoord2f( 0.0, 1.0 ); glVertex2f( -1.0, 1.0 );
- glEnd();
- glPopMatrix();
-
- glutSwapBuffers();
-}
-
-
-
-static void idle( void )
-{
- static double t0 = -1.;
- double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
- if (t0 < 0.0)
- t0 = t;
- dt = t - t0;
- t0 = t;
- Angle += 120.0*dt;
- glutPostRedisplay();
-}
-
-
-
-/* change view Angle, exit upon ESC */
-static void key(unsigned char k, int x, int y)
-{
- (void) x;
- (void) y;
- switch (k) {
- case 27:
-#ifdef TEXTURE_OBJECT
- glDeleteTextures( 2, TexObj );
-#endif
- glutDestroyWindow(Window);
- exit(0);
- }
-}
-
-
-
-/* new window size or exposure */
-static void reshape( int width, int height )
-{
- glViewport(0, 0, (GLint)width, (GLint)height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- /* glOrtho( -3.0, 3.0, -3.0, 3.0, -10.0, 10.0 );*/
- glFrustum( -2.0, 2.0, -2.0, 2.0, 6.0, 20.0 );
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef( 0.0, 0.0, -8.0 );
-}
-
-
-static void init( void )
-{
- static int width=8, height=8;
- static GLubyte tex1[] = {
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 1, 0, 0, 0,
- 0, 0, 0, 1, 1, 0, 0, 0,
- 0, 0, 0, 0, 1, 0, 0, 0,
- 0, 0, 0, 0, 1, 0, 0, 0,
- 0, 0, 0, 0, 1, 0, 0, 0,
- 0, 0, 0, 1, 1, 1, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0 };
-
- static GLubyte tex2[] = {
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 2, 2, 0, 0, 0,
- 0, 0, 2, 0, 0, 2, 0, 0,
- 0, 0, 0, 0, 0, 2, 0, 0,
- 0, 0, 0, 0, 2, 0, 0, 0,
- 0, 0, 0, 2, 0, 0, 0, 0,
- 0, 0, 2, 2, 2, 2, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0 };
-
- GLubyte tex[64][3];
- GLint i, j;
-
-
- glDisable( GL_DITHER );
-
- /* Setup texturing */
- glEnable( GL_TEXTURE_2D );
- glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL );
- glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST );
-
-
- /* generate texture object IDs */
- if (UseObj) {
-#ifdef TEXTURE_OBJECT
- glGenTextures( 2, TexObj );
-#endif
- }
- else {
- TexObj[0] = glGenLists(2);
- TexObj[1] = TexObj[0]+1;
- }
-
- /* setup first texture object */
- if (UseObj) {
-#ifdef TEXTURE_OBJECT
- glBindTexture( GL_TEXTURE_2D, TexObj[0] );
- assert(glIsTexture(TexObj[0]));
-#endif
- }
- else {
- glNewList( TexObj[0], GL_COMPILE );
- }
- /* red on white */
- for (i=0;i<height;i++) {
- for (j=0;j<width;j++) {
- int p = i*width+j;
- if (tex1[(height-i-1)*width+j]) {
- tex[p][0] = 255; tex[p][1] = 0; tex[p][2] = 0;
- }
- else {
- tex[p][0] = 255; tex[p][1] = 255; tex[p][2] = 255;
- }
- }
- }
-
- glTexImage2D( GL_TEXTURE_2D, 0, 3, width, height, 0,
- GL_RGB, GL_UNSIGNED_BYTE, tex );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
- if (!UseObj) {
- glEndList();
- }
- /* end of texture object */
-
- /* setup second texture object */
- if (UseObj) {
-#ifdef TEXTURE_OBJECT
- glBindTexture( GL_TEXTURE_2D, TexObj[1] );
- assert(glIsTexture(TexObj[1]));
-#endif
- assert(!glIsTexture(TexObj[1] + 999));
- }
- else {
- glNewList( TexObj[1], GL_COMPILE );
- }
- /* green on blue */
- for (i=0;i<height;i++) {
- for (j=0;j<width;j++) {
- int p = i*width+j;
- if (tex2[(height-i-1)*width+j]) {
- tex[p][0] = 0; tex[p][1] = 255; tex[p][2] = 0;
- }
- else {
- tex[p][0] = 0; tex[p][1] = 0; tex[p][2] = 255;
- }
- }
- }
- glTexImage2D( GL_TEXTURE_2D, 0, 3, width, height, 0,
- GL_RGB, GL_UNSIGNED_BYTE, tex );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
- if (!UseObj) {
- glEndList();
- }
- /* end texture object */
-
-}
-
-
-
-int main( int argc, char *argv[] )
-{
- glutInit(&argc, argv);
- glutInitWindowPosition(0, 0);
- glutInitWindowSize(300, 300);
- glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
-
- Window = glutCreateWindow("Texture Objects");
- if (!Window) {
- exit(1);
- }
-
- /* check that renderer has the GL_EXT_texture_object extension
- * or supports OpenGL 1.1
- */
-#ifdef TEXTURE_OBJECT
- {
- char *exten = (char *) glGetString( GL_EXTENSIONS );
- char *version = (char *) glGetString( GL_VERSION );
- if ( strstr( exten, "GL_EXT_texture_object" )
- || strncmp( version, "1.1", 3 )==0
- || strncmp( version, "1.2", 3 )==0 ) {
- UseObj = GL_TRUE;
- }
- }
-#endif
-
- init();
-
- glutReshapeFunc( reshape );
- glutKeyboardFunc( key );
- glutIdleFunc( idle );
- glutDisplayFunc( draw );
- glutMainLoop();
- return 0;
-}
diff --git a/progs/demos/tunnel.c b/progs/demos/tunnel.c
index 6a240580e8..6981da3298 100644
--- a/progs/demos/tunnel.c
+++ b/progs/demos/tunnel.c
@@ -203,10 +203,18 @@ special(int k, int x, int y)
}
static void
+cleanup(void)
+{
+ glDeleteTextures(1, &t1id);
+ glDeleteTextures(1, &t2id);
+}
+
+static void
key(unsigned char k, int x, int y)
{
switch (k) {
case 27:
+ cleanup();
exit(0);
break;
@@ -531,5 +539,6 @@ main(int ac, char **av)
glutMainLoop();
+ cleanup();
return 0;
}
diff --git a/progs/demos/tunnel2.c b/progs/demos/tunnel2.c
index f4171a8346..0288ea0f8c 100644
--- a/progs/demos/tunnel2.c
+++ b/progs/demos/tunnel2.c
@@ -201,12 +201,20 @@ special(int k, int x, int y)
}
static void
+cleanup(void)
+{
+ glDeleteTextures(1, &t1id);
+ glDeleteTextures(1, &t2id);
+}
+
+static void
key(unsigned char k, int x, int y)
{
switch (k) {
case 27:
glutDestroyWindow(channel[0]);
glutDestroyWindow(channel[1]);
+ cleanup();
exit(0);
break;
@@ -602,6 +610,7 @@ main(int ac, char **av)
calcposobs();
glutMainLoop();
+ cleanup();
return 0;
}
diff --git a/progs/demos/vao_demo.c b/progs/demos/vao_demo.c
index ce416712fe..206e06fc6c 100644
--- a/progs/demos/vao_demo.c
+++ b/progs/demos/vao_demo.c
@@ -260,6 +260,8 @@ static void Key( unsigned char key, int x, int y )
(void) y;
switch (key) {
case 27:
+ (*delete_vertex_arrays)( 1, & cube_array_obj );
+ (*delete_vertex_arrays)( 1, & oct_array_obj );
glutDestroyWindow(Win);
exit(0);
break;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 04:42:30 +0000