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-rw-r--r--progs/samples/stretch.c390
1 files changed, 0 insertions, 390 deletions
diff --git a/progs/samples/stretch.c b/progs/samples/stretch.c
deleted file mode 100644
index 11201dca23..0000000000
--- a/progs/samples/stretch.c
+++ /dev/null
@@ -1,390 +0,0 @@
-/*
- * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
- *
- * Permission to use, copy, modify, distribute, and sell this software and
- * its documentation for any purpose is hereby granted without fee, provided
- * that (i) the above copyright notices and this permission notice appear in
- * all copies of the software and related documentation, and (ii) the name of
- * Silicon Graphics may not be used in any advertising or
- * publicity relating to the software without the specific, prior written
- * permission of Silicon Graphics.
- *
- * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
- * ANY KIND,
- * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
- * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- *
- * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
- * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
- * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
- * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- * OF THIS SOFTWARE.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <GL/glut.h>
-
-
-#define STEPCOUNT 40
-#define FALSE 0
-#define TRUE 1
-#define MAX(a, b) (((a) > (b)) ? (a) : (b))
-#define MIN(a, b) (((a) < (b)) ? (a) : (b))
-
-
-enum {
- OP_NOOP = 0,
- OP_STRETCH,
- OP_DRAWPOINT,
- OP_DRAWIMAGE
-};
-
-
-typedef struct _cRec {
- float x, y;
-} cRec;
-
-typedef struct _vertexRec {
- float x, y;
- float dX, dY;
- float tX, tY;
-} vertexRec;
-
-
-#include "loadppm.c"
-
-GLenum doubleBuffer;
-int imageSizeX, imageSizeY;
-char *fileName = 0;
-PPMImage *image;
-cRec cList[50];
-vertexRec vList[5];
-int cCount, cIndex[2], cStep;
-GLenum op = OP_NOOP;
-
-
-static void DrawImage(void)
-{
-
- glRasterPos2i(0, 0);
- glDrawPixels(image->sizeX, image->sizeY, GL_RGB, GL_UNSIGNED_BYTE,
- image->data);
-
- glFlush();
- if (doubleBuffer) {
- glutSwapBuffers();
- }
-
- glRasterPos2i(0, 0);
- glDrawPixels(image->sizeX, image->sizeY, GL_RGB, GL_UNSIGNED_BYTE,
- image->data);
-}
-
-static void DrawPoint(void)
-{
- int i;
-
- glColor3f(1.0, 0.0, 1.0);
- glPointSize(3.0);
- glBegin(GL_POINTS);
- for (i = 0; i < cCount; i++) {
- glVertex2f(cList[i].x, cList[i].y);
- }
- glEnd();
-
- glFlush();
- if (doubleBuffer) {
- glutSwapBuffers();
- }
-}
-
-static void InitVList(void)
-{
-
- vList[0].x = 0.0;
- vList[0].y = 0.0;
- vList[0].dX = 0.0;
- vList[0].dY = 0.0;
- vList[0].tX = 0.0;
- vList[0].tY = 0.0;
-
- vList[1].x = (float)imageSizeX;
- vList[1].y = 0.0;
- vList[1].dX = 0.0;
- vList[1].dY = 0.0;
- vList[1].tX = 1.0;
- vList[1].tY = 0.0;
-
- vList[2].x = (float)imageSizeX;
- vList[2].y = (float)imageSizeY;
- vList[2].dX = 0.0;
- vList[2].dY = 0.0;
- vList[2].tX = 1.0;
- vList[2].tY = 1.0;
-
- vList[3].x = 0.0;
- vList[3].y = (float)imageSizeY;
- vList[3].dX = 0.0;
- vList[3].dY = 0.0;
- vList[3].tX = 0.0;
- vList[3].tY = 1.0;
-
- vList[4].x = cList[0].x;
- vList[4].y = cList[0].y;
- vList[4].dX = (cList[1].x - cList[0].x) / STEPCOUNT;
- vList[4].dY = (cList[1].y - cList[0].y) / STEPCOUNT;
- vList[4].tX = cList[0].x / (float)imageSizeX;
- vList[4].tY = cList[0].y / (float)imageSizeY;
-}
-
-static void ScaleImage(int sizeX, int sizeY)
-{
- GLubyte *buf;
-
- buf = (GLubyte *)malloc(3*sizeX*sizeY);
- gluScaleImage(GL_RGB, image->sizeX, image->sizeY, GL_UNSIGNED_BYTE,
- image->data, sizeX, sizeY, GL_UNSIGNED_BYTE, buf);
- free(image->data);
- image->data = buf;
- image->sizeX = sizeX;
- image->sizeY = sizeY;
-}
-
-static void SetPoint(int x, int y)
-{
-
- cList[cCount].x = (float)x;
- cList[cCount].y = (float)y;
- cCount++;
-}
-
-static void Stretch(void)
-{
-
- glBegin(GL_TRIANGLES);
- glTexCoord2f(vList[0].tX, vList[0].tY);
- glVertex2f(vList[0].x, vList[0].y);
- glTexCoord2f(vList[1].tX, vList[1].tY);
- glVertex2f(vList[1].x, vList[1].y);
- glTexCoord2f(vList[4].tX, vList[4].tY);
- glVertex2f(vList[4].x, vList[4].y);
- glEnd();
-
- glBegin(GL_TRIANGLES);
- glTexCoord2f(vList[1].tX, vList[1].tY);
- glVertex2f(vList[1].x, vList[1].y);
- glTexCoord2f(vList[2].tX, vList[2].tY);
- glVertex2f(vList[2].x, vList[2].y);
- glTexCoord2f(vList[4].tX, vList[4].tY);
- glVertex2f(vList[4].x, vList[4].y);
- glEnd();
-
- glBegin(GL_TRIANGLES);
- glTexCoord2f(vList[2].tX, vList[2].tY);
- glVertex2f(vList[2].x, vList[2].y);
- glTexCoord2f(vList[3].tX, vList[3].tY);
- glVertex2f(vList[3].x, vList[3].y);
- glTexCoord2f(vList[4].tX, vList[4].tY);
- glVertex2f(vList[4].x, vList[4].y);
- glEnd();
-
- glBegin(GL_TRIANGLES);
- glTexCoord2f(vList[3].tX, vList[3].tY);
- glVertex2f(vList[3].x, vList[3].y);
- glTexCoord2f(vList[0].tX, vList[0].tY);
- glVertex2f(vList[0].x, vList[0].y);
- glTexCoord2f(vList[4].tX, vList[4].tY);
- glVertex2f(vList[4].x, vList[4].y);
- glEnd();
-
- glFlush();
- if (doubleBuffer) {
- glutSwapBuffers();
- }
-
- if (++cStep < STEPCOUNT) {
- vList[4].x += vList[4].dX;
- vList[4].y += vList[4].dY;
- } else {
- cIndex[0] = cIndex[1];
- cIndex[1] = cIndex[1] + 1;
- if (cIndex[1] == cCount) {
- cIndex[1] = 0;
- }
- vList[4].dX = (cList[cIndex[1]].x - cList[cIndex[0]].x) / STEPCOUNT;
- vList[4].dY = (cList[cIndex[1]].y - cList[cIndex[0]].y) / STEPCOUNT;
- cStep = 0;
- }
-}
-
-static void Key(unsigned char key, int x, int y)
-{
-
- switch (key) {
- case 27:
- free(image->data);
- exit(1);
- case 32:
- if (cCount > 1) {
- InitVList();
- cIndex[0] = 0;
- cIndex[1] = 1;
- cStep = 0;
- glEnable(GL_TEXTURE_2D);
- op = OP_STRETCH;
- }
- break;
- default:
- return;
- }
-
- glutPostRedisplay();
-}
-
-static void Mouse(int button, int state, int mouseX, int mouseY)
-{
-
- if (state != GLUT_DOWN)
- return;
-
- if (op == OP_STRETCH) {
- glDisable(GL_TEXTURE_2D);
- cCount = 0;
- op = OP_DRAWIMAGE;
- } else {
- SetPoint(mouseX, imageSizeY-mouseY);
- op = OP_DRAWPOINT;
- }
-
- glutPostRedisplay();
-}
-
-static void Animate(void)
-{
- static double t0 = -1.;
- double t, dt;
- t = glutGet(GLUT_ELAPSED_TIME) / 1000.;
- if (t0 < 0.)
- t0 = t;
- dt = t - t0;
-
- if (dt < 1./60.)
- return;
-
- t0 = t;
-
- switch (op) {
- case OP_STRETCH:
- Stretch();
- break;
- case OP_DRAWPOINT:
- DrawPoint();
- break;
- case OP_DRAWIMAGE:
- DrawImage();
- break;
- default:
- break;
- }
-}
-
-static GLenum Args(int argc, char **argv)
-{
- GLint i;
-
- doubleBuffer = GL_TRUE;
-
- for (i = 1; i < argc; i++) {
- if (strcmp(argv[i], "-sb") == 0) {
- doubleBuffer = GL_FALSE;
- } else if (strcmp(argv[i], "-db") == 0) {
- doubleBuffer = GL_TRUE;
- } else if (strcmp(argv[i], "-f") == 0) {
- if (i+1 >= argc || argv[i+1][0] == '-') {
- printf("-f (No file name).\n");
- return GL_FALSE;
- } else {
- fileName = argv[++i];
- }
- } else {
- printf("%s (Bad option).\n", argv[i]);
- return GL_FALSE;
- }
- }
- return GL_TRUE;
-}
-
-#if !defined(GLUTCALLBACK)
-#define GLUTCALLBACK
-#endif
-
-static void GLUTCALLBACK glut_post_redisplay_p(void)
-{
- glutPostRedisplay();
-}
-
-int main(int argc, char **argv)
-{
- GLenum type;
-
- glutInit(&argc, argv);
-
- if (Args(argc, argv) == GL_FALSE) {
- exit(1);
- }
-
- if (fileName == 0) {
- printf("No image file.\n");
- exit(1);
- }
-
- image = LoadPPM(fileName);
-
- /* changed powf and logf to pow and log -Brian */
- imageSizeX = (int)pow(2.0, (float)((int)(log(image->sizeX)/log(2.0))));
- imageSizeY = (int)pow(2.0, (float)((int)(log(image->sizeY)/log(2.0))));
-
- glutInitWindowPosition(0, 0); glutInitWindowSize( imageSizeX, imageSizeY);
-
- type = GLUT_RGB;
- type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
- glutInitDisplayMode(type);
-
- if (glutCreateWindow("Stretch") == GL_FALSE) {
- exit(1);
- }
-
- glViewport(0, 0, imageSizeX, imageSizeY);
- gluOrtho2D(0, imageSizeX, 0, imageSizeY);
- glClearColor(0.0, 0.0, 0.0, 0.0);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
-
- ScaleImage(imageSizeX, imageSizeY);
-
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexImage2D(GL_TEXTURE_2D, 0, 3, image->sizeX, image->sizeY, 0,
- GL_RGB, GL_UNSIGNED_BYTE, (unsigned char *)image->data);
-
- cCount = 0;
- cIndex[0] = 0;
- cIndex[1] = 0;
- cStep = 0;
- op = OP_DRAWIMAGE;
-
- glutKeyboardFunc(Key);
- glutMouseFunc(Mouse);
- glutDisplayFunc(Animate);
- glutIdleFunc(glut_post_redisplay_p);
- glutMainLoop();
- return 0;
-}
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