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authorEric Anholt <eric@anholt.net>2010-05-21 09:32:38 -0700
committerEric Anholt <eric@anholt.net>2010-05-21 12:20:39 -0700
commit68fc4b415e322f6744299e39864fbc377c6eff74 (patch)
tree4bafffd8b0105174f3c5c0ae327a005be9145990 /progs/glsl/twoside.c
parente4f4489e3fc0b36d72821b55794fb843b2b7fa5f (diff)
Remove demos that have moved to git+ssh://git.freedesktop.org/git/mesa/demos.
The remaining programs are ones I've had difficulty finding a build environment for to make the build system or are unit tests that should probably live next to their code instead. Hopefully people can bring over the build for remaining pieces they care about.
Diffstat (limited to 'progs/glsl/twoside.c')
-rw-r--r--progs/glsl/twoside.c305
1 files changed, 0 insertions, 305 deletions
diff --git a/progs/glsl/twoside.c b/progs/glsl/twoside.c
deleted file mode 100644
index ce155d64e9..0000000000
--- a/progs/glsl/twoside.c
+++ /dev/null
@@ -1,305 +0,0 @@
-/**
- * Test two-sided lighting with shaders.
- * Both GL_VERTEX_PROGRAM_TWO_SIDE and gl_FrontFacing can be tested
- * (see keys below).
- *
- * Brian Paul
- * 18 Dec 2007
- */
-
-#include <assert.h>
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <GL/glew.h>
-#include <GL/glut.h>
-#include "shaderutil.h"
-
-#ifndef M_PI
-#define M_PI 3.1415926535
-#endif
-
-static GLint WinWidth = 300, WinHeight = 300;
-static char *FragProgFile = NULL;
-static char *VertProgFile = NULL;
-static GLuint fragShader;
-static GLuint vertShader;
-static GLuint program;
-static GLint win = 0;
-static GLboolean anim;
-static GLboolean DetermineFacingInFragProg;
-static GLfloat Xrot;
-static GLint u_fragface;
-static GLenum FrontWinding;
-static int prevTime = 0;
-
-
-static const GLfloat Red[4] = {1, 0, 0, 1};
-static const GLfloat Green[4] = {0, 1, 0, 0};
-
-
-static void
-SetDefaults(void)
-{
- DetermineFacingInFragProg = GL_TRUE;
- FrontWinding = GL_CCW;
- Xrot = 30;
- anim = 0;
- glutIdleFunc(NULL);
-}
-
-
-static void
-Redisplay(void)
-{
- const int sections = 20;
- int i;
- float radius = 2;
-
- glFrontFace(FrontWinding);
-
- if (DetermineFacingInFragProg) {
- glUniform1i(u_fragface, 1);
- glDisable(GL_VERTEX_PROGRAM_TWO_SIDE);
- }
- else {
- glUniform1i(u_fragface, 0);
- glEnable(GL_VERTEX_PROGRAM_TWO_SIDE);
- }
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
-
- glPushMatrix();
- glRotatef(Xrot, 1, 0, 0);
-
- /* Draw a tristrip ring */
- glBegin(GL_TRIANGLE_STRIP);
- glColor4fv(Red);
- glSecondaryColor3fv(Green);
- for (i = 0; i <= sections; i++) {
- float a = (float) i / (sections) * M_PI * 2.0;
- float x = radius * cos(a);
- float y = radius * sin(a);
- glVertex3f(x, -1, y);
- glVertex3f(x, +1, y);
- }
- glEnd();
-
- glPopMatrix();
-
- glutSwapBuffers();
-}
-
-
-static void
-Idle(void)
-{
- int curTime = glutGet(GLUT_ELAPSED_TIME);
- int dt = curTime - prevTime;
-
- if (prevTime == 0) {
- prevTime = curTime;
- return;
- }
- prevTime = curTime;
-
- Xrot += dt * 0.1;
- glutPostRedisplay();
-}
-
-
-static void
-Reshape(int width, int height)
-{
- float ar = (float) width / height;
- glViewport(0, 0, width, height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum(-ar, ar, -1, 1, 3, 25);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(0, 0, -10);
-}
-
-
-static void
-CleanUp(void)
-{
- glDeleteShader(fragShader);
- glDeleteShader(vertShader);
- glDeleteProgram(program);
- glutDestroyWindow(win);
-}
-
-
-static void
-Key(unsigned char key, int x, int y)
-{
- (void) x;
- (void) y;
-
- switch(key) {
- case ' ':
- case 'a':
- anim = !anim;
- if (anim) {
- prevTime = glutGet(GLUT_ELAPSED_TIME);
- glutIdleFunc(Idle);
- }
- else
- glutIdleFunc(NULL);
- break;
- case 'f':
- printf("Using frag shader gl_FrontFacing\n");
- DetermineFacingInFragProg = GL_TRUE;
- break;
- case 'v':
- printf("Using vert shader Two-sided lighting\n");
- DetermineFacingInFragProg = GL_FALSE;
- break;
- case 'r':
- /* reset */
- SetDefaults();
- break;
- case 's':
- Xrot += 5;
- break;
- case 'S':
- Xrot -= 5;
- break;
- case 'w':
- if (FrontWinding == GL_CCW) {
- FrontWinding = GL_CW;
- printf("FrontFace = GL_CW\n");
- }
- else {
- FrontWinding = GL_CCW;
- printf("FrontFace = GL_CCW\n");
- }
- break;
- case 27:
- CleanUp();
- exit(0);
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void
-Init(void)
-{
- static const char *fragShaderText =
- "uniform bool fragface; \n"
- "void main() { \n"
-#if 1
- " if (!fragface || gl_FrontFacing) { \n"
- " gl_FragColor = gl_Color; \n"
- " } \n"
- " else { \n"
- " // note: dim green to help debug \n"
- " gl_FragColor = 0.8 * gl_SecondaryColor; \n"
- " } \n"
-#else
- /* DEBUG CODE */
- " bool f = gl_FrontFacing; \n"
- " if (f) { \n"
- " gl_FragColor = vec4(1.0, 0.0, 0.0, 0.0); \n"
- " } \n"
- " else { \n"
- " gl_FragColor = vec4(0.0, 1.0, 0.0, 0.0); \n"
- " } \n"
-#endif
- "} \n";
- static const char *vertShaderText =
- "uniform bool fragface; \n"
- "void main() { \n"
- " gl_FrontColor = gl_Color; \n"
- " if (fragface) { \n"
- " // front/back chosen in frag prog \n"
- " gl_FrontSecondaryColor = gl_SecondaryColor; \n"
- " } \n"
- " else { \n"
- " // front/back chosen in prim setup \n"
- " gl_BackColor = gl_SecondaryColor; \n"
- " } \n"
- " gl_Position = ftransform(); \n"
- "} \n";
-
- if (!ShadersSupported())
- exit(1);
-
- vertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
- fragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
- program = LinkShaders(vertShader, fragShader);
-
- glUseProgram(program);
-
- u_fragface = glGetUniformLocation(program, "fragface");
- printf("Uniforms: %d\n", u_fragface);
-
- /*assert(glGetError() == 0);*/
-
- glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
-
- printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
-
- assert(glIsProgram(program));
- assert(glIsShader(fragShader));
- assert(glIsShader(vertShader));
-
- glEnable(GL_DEPTH_TEST);
-
- SetDefaults();
-}
-
-
-static void
-ParseOptions(int argc, char *argv[])
-{
- int i;
- for (i = 1; i < argc; i++) {
- if (strcmp(argv[i], "-fs") == 0) {
- FragProgFile = argv[i+1];
- }
- else if (strcmp(argv[i], "-vs") == 0) {
- VertProgFile = argv[i+1];
- }
- }
-}
-
-
-static void
-Usage(void)
-{
- printf("Keys:\n");
- printf(" f - do front/back determination in fragment shader\n");
- printf(" v - do front/back determination in vertex shader\n");
- printf(" r - reset, show front\n");
- printf(" a - toggle animation\n");
- printf(" s - step rotation\n");
- printf(" w - toggle CW, CCW front-face winding\n");
- printf("NOTE: red = front face, green = back face.\n");
-}
-
-
-int
-main(int argc, char *argv[])
-{
- glutInit(&argc, argv);
- glutInitWindowSize(WinWidth, WinHeight);
- glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
- win = glutCreateWindow(argv[0]);
- glewInit();
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutDisplayFunc(Redisplay);
- if (anim)
- glutIdleFunc(Idle);
- ParseOptions(argc, argv);
- Init();
- Usage();
- glutMainLoop();
- return 0;
-}