Attachment 16863 Details for Bug 16192 – test case

test case

tex-4d.c (text/plain), 3.74 KB, created by WuNian on 2008-06-02 00:57:39 UTC

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Creator: WuNian

Created: 2008-06-02 00:57:39 UTC

Size: 3.74 KB

patch

obsolete

>#include "GL/glut.h"
>#include <string.h>
>#include <stdio.h>
>#include <unistd.h>
>#include <stdlib.h>
>
>#define WINDSIZEX 100
>#define WINDSIZEY 100
>
>#define TEXSIZE 64
>
>
>static GLfloat *buf1;               // Buffers for reading screen
>
>static GLfloat *rgbFourTexture;
>
>static GLuint  texImages;
>
>static GLfloat mMap[] = {
>   1.0, 0.0, 0.0, 0.0,
>   0.0, 1.0, 0.0, 0.0,
>   1.0, 1.0, 0.0, 0.0,
>   0.0, 0.0, 0.0, 1.0,
>};
>
>static GLfloat mScale[] = {
>   1.0/64.0,      0.0, 0.0, 0.0,
>   0.0,      1.0/64.0, 0.0, 0.0,
>   0.0,           0.0, 0.0, 0.0,
>   0.0,           0.0, 0.0, 1.0,
>};
>
>typedef struct {
>   GLfloat s1;
>   GLfloat t1;
>   GLfloat s2;
>   GLfloat t2;
>   GLfloat r;
>   GLfloat q;
>} COORD_RECT;
>
>
>static COORD_RECT pcrect = { -4.0, -4.0, 124.0, 124.0,  4.0,   2.0};
>
>//static COORD_RECT pcrect = { 0.0, 0.0, 64.0, 64.0,  0, 0};
>
>GLfloat colorMap[][3] = {
>   {
>      0.0, 0.0, 0.0
>   },
>   {
>      1.0, 0.0, 0.0
>   },
>   {
>      0.0, 1.0, 0.0 
>   },
>   {
>      0.0, 0.0, 1.0
>   }
>};
>
>
>static void CreateFourColorTexture(void)
>{
>   GLint   x, y, colorIndex;
>   GLint   xmappos, ymappos;
>   GLfloat *prgb = rgbFourTexture;
>
>   for (y = 0; y < TEXSIZE; y++) {
>      for (x = 0; x < TEXSIZE; x++) {
>	 xmappos = x / 4;
>	 ymappos = y / 4;
>	 colorIndex = (xmappos + ymappos + 1) % 4;
>	 *prgb++ = colorMap[colorIndex][0];
>	 *prgb++ = colorMap[colorIndex][1];
>	 *prgb++ = colorMap[colorIndex][2];
>      }
>   }
>}
>
>
>void init()
>{
>   glDisable(GL_DITHER);
>
>   glClearColor (0.0, 0.0, 0.0, 0.0);
>
>   buf1 = (GLfloat *)malloc(WINDSIZEX*WINDSIZEY*sizeof(GLfloat)*3);
>   rgbFourTexture   = (GLfloat *)malloc(TEXSIZE*TEXSIZE*3*sizeof(GLfloat));
>
>   glGenTextures(1, &texImages);     
>
>   glBindTexture (GL_TEXTURE_2D, texImages);
>
>   glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
>   glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
>   glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
>   glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
>
>   CreateFourColorTexture ();
>   glTexImage2D (GL_TEXTURE_2D, 0, GL_RGB, TEXSIZE, TEXSIZE,
>	 0, GL_RGB, GL_FLOAT, rgbFourTexture);
>   glEnable (GL_TEXTURE_2D);
>
>   glMatrixMode (GL_TEXTURE);
>   glLoadIdentity ();
>   glLoadMatrixf (mScale);
>   glMultMatrixf (mMap);
>}
>
>#define X1   4
>#define Y1   4
>#define X2  68
>#define Y2  68
>
>long Test ()
>{
>
>   GLint   x;
>
>   glReadPixels(X1, Y1, X2, Y2, GL_RGB, GL_FLOAT, buf1);
>   for (x = 0; x < 64; x++)
>	   printf("pixel color: %f %f %f\n", buf1[x*3], buf1[x*3+1], buf1[x*3+2]);
>   return 0;
>}
>
>
>void test(){
>   glClear (GL_COLOR_BUFFER_BIT);
>
>   glBindTexture (GL_TEXTURE_2D, texImages);
>   glBegin (GL_QUADS);
>   glTexCoord4d (pcrect.s1, pcrect.t1, pcrect.r, pcrect.q);
>   glVertex2f (X1, Y1);
>   glTexCoord4d (pcrect.s2, pcrect.t1, pcrect.r, pcrect.q);
>   glVertex2f (X2, Y1);
>   glTexCoord4d (pcrect.s2, pcrect.t2, pcrect.r, pcrect.q);
>   glVertex2f (X2, Y2);
>   glTexCoord4d (pcrect.s1, pcrect.t2, pcrect.r, pcrect.q);
>   glVertex2f (X1, Y2);
>   glEnd ();
>
>/*   glBegin (GL_QUADS);
>   glTexCoord2d (pcrect.s1, pcrect.t1);
>   glVertex2f (X1, Y1);
>   glTexCoord2d (pcrect.s2, pcrect.t1);
>   glVertex2f (X2, Y1);
>   glTexCoord2d (pcrect.s2, pcrect.t2);
>   glVertex2f (X2, Y2);
>   glTexCoord2d (pcrect.s1, pcrect.t2);
>   glVertex2f (X1, Y2);
>   glEnd ();
>*/
>   Test();
>
>//   exit(0);
>}
>
>void display()
>{
>   glViewport(0, 0, WINDSIZEX, WINDSIZEY);
>   glMatrixMode(GL_PROJECTION);
>   glLoadIdentity();
>   gluOrtho2D(0, WINDSIZEY, 0, WINDSIZEX);
>   glMatrixMode(GL_MODELVIEW);
>   glLoadIdentity();
>
>   test();
>}
>
>
>
>void main(int argc, char** argv)
>{
>   glutInit(&argc, argv);
>   glutInitDisplayMode (GLUT_SINGLE | GLUT_RGBA);
>   glutInitWindowSize (WINDSIZEX, WINDSIZEY);
>   glutInitWindowPosition (100, 100);
>   glutCreateWindow ("hello");
>   init();
>   glutDisplayFunc(display);
>   glutMainLoop();
>}

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Attachments on bug 16192: 16863

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