Attachment 11003 Details for Bug 11856 – test case

test case

pointsprite.c (text/plain), 3.21 KB, created by WuNian on 2007-08-05 23:41:20 UTC

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Creator: WuNian

Created: 2007-08-05 23:41:20 UTC

Size: 3.21 KB

patch

obsolete

>#include <GL/glut.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <math.h>
>
>#define WINDSIZEX 100
>#define WINDSIZEY 100
>
>
>   GLint texID;
>
>void init(void)
>{
>   int i, j;
>   GLfloat   texImage0[4][4][4];
>   GLfloat   texImage1[2][2][4];
>   GLfloat   texImage2[1][1][4];
>
>   for (i = 0; i < 4; i++)
>   {
>      for (j = 0; j < 4; j++)
>      {
>            texImage0[i][j][0] = 1.0;
>            texImage0[i][j][1] = 0.0;
>            texImage0[i][j][2] = 0.0;
>            texImage0[i][j][3] = 0.0;
>      }
>   }
>
>   for (i = 0; i < 2; i++)
>   {
>      for (j = 0; j < 2; j++)
>      {
>            texImage1[i][j][0] = 0.0;
>            texImage1[i][j][1] = 1.0;
>            texImage1[i][j][2] = 0.0;
>            texImage1[i][j][3] = 0.0;
>      }
>   }
>
>   
>            texImage2[1][1][0] = 0.0;
>            texImage2[1][1][1] = 0.0;
>            texImage2[1][1][2] = 1.0;
>            texImage2[1][1][3] = 0.0;
>
>
>   glGenTextures(1, &texID);
>
>   glBindTexture(GL_TEXTURE_2D, texID);
>
>   glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER, //GL_NEAREST);
>                                   GL_NEAREST_MIPMAP_NEAREST);
>   glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER, GL_NEAREST);
>   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 4, 4, 0, GL_RGBA, GL_FLOAT,
>         texImage0);
>   glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA, 2, 2, 0, GL_RGBA, GL_FLOAT,
>         texImage1);
>   glTexImage2D(GL_TEXTURE_2D, 2, GL_RGBA, 1, 1, 0, GL_RGBA, GL_FLOAT,
>         texImage2);
>
>   glEnable(GL_TEXTURE_2D);
>   /*glTexEnvf(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE);
> 
>   glEnable(GL_POINT_SPRITE);
>
>   GLfloat maxSize;
>   glGetFloatv(GL_POINT_SIZE_MAX, &maxSize);
>   printf ("max point size: %f\n", maxSize);
>*/
>}
>
>#define TEX_WIDTH 2
>static void test(void)
>{    
>   GLfloat buf[(TEX_WIDTH+2)*(TEX_WIDTH+2)*3];
>   int i, j;
>
>   glClear(GL_COLOR_BUFFER_BIT);
>   glBindTexture(GL_TEXTURE_2D, texID);
>/*
>   glPointSize(TEX_WIDTH);
>   glBegin(GL_POINTS);
>      glVertex2f(TEX_WIDTH/2+1, TEX_WIDTH/2+1);
>   glEnd();
>*/
>   int size = 2;
>   glBegin(GL_QUADS);
>   glTexCoord2f(0.0, 0.0); glVertex2f(12.0, 12.0);
>   glTexCoord2f(0.0, 1.0); glVertex2f(12.0, 12.0+size);
>   glTexCoord2f(1.0, 1.0); glVertex2f(12.0+size, 12.0+size);
>   glTexCoord2f(1.0, 0.0); glVertex2f(12.0+size, 12.0);
>   glEnd();
>   glFlush();
>
>
>
>   glReadPixels(11, 11, 4, 4, GL_RGB, GL_FLOAT, buf);
>   //glReadPixels(11, 11, TEX_WIDTH+2, TEX_WIDTH+2, GL_RGB, GL_FLOAT, buf);
>   for (i=0; i<TEX_WIDTH+2; i++)
>   {
>      printf ("row %d: ", i);
>      for (j=0; j<TEX_WIDTH+2; j++){
>          printf("(%f %f %f)  ", buf[(i*(TEX_WIDTH+2)+j)*3], buf[(i*(TEX_WIDTH+2)+j)*3+1], buf[(i*(TEX_WIDTH+2)+j)*3+2]);
>      }
>      printf("\n");
>   }
>}
>
>void display(void)
>{
>    glViewport(0, 0, WINDSIZEX, WINDSIZEY);
>        glMatrixMode(GL_PROJECTION);
>        glLoadIdentity();
>    gluOrtho2D(0, WINDSIZEX, 0, WINDSIZEY);
>        glMatrixMode(GL_MODELVIEW);
>        glLoadIdentity();
>
>    test();
>}
>
>int main(int argc, char** argv)
>{
>   printf ("Please check the support to point_sprite yourself!\n");
>
>   glutInit(&argc, argv);
>   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
>   glutInitWindowSize(WINDSIZEX, WINDSIZEY);
>   glutInitWindowPosition(100, 100);
>   glutCreateWindow(argv[0]);
>   init();
>   glutDisplayFunc(display);
>   glutMainLoop();
>   return 0; 
>}

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