diff options
Diffstat (limited to 'progs/samples/stretch.c')
-rw-r--r-- | progs/samples/stretch.c | 390 |
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; -} |