Attachment 13102 Details for Bug 13651 – test case

test case

case_13651.c (text/plain), 2.68 KB, created by WuNian on 2007-12-14 00:12:24 UTC

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Creator: WuNian

Created: 2007-12-14 00:12:24 UTC

Size: 2.68 KB

patch

obsolete

>#include <GL/glut.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <math.h>
>
>#define WINDSIZEX 100
>#define WINDSIZEY 100
>
>#define TEXSIZEX  8
>#define TEXSIZEY  64
>
>GLfloat *buf;
>
>GLfloat colorMap[][3] = {
>   {
>      1.0, 0.0, 0.0
>   },
>   {   
>      0.0, 1.0, 0.0 
>   },      
>   {       
>      0.0, 0.0, 1.0
>   },
>   {
>      1.0, 1.0, 0.0
>   },
>   {
>      1.0, 0.0, 1.0
>   },
>   {
>      0.0, 1.0, 1.0
>   },
>   {
>      1.0, 1.0, 1.0
>   }
>};
>
>
>static void makeMipmap(GLsizei sizeX, GLsizei sizeY)
>{
>   GLfloat *ptr;
>   GLint level, i;
>
>   level = 0;
>   while (sizeX > 0 || sizeY > 0) {
>      ptr = buf;
>      for (i = 0; i < ((sizeX==0)?1:sizeX) * ((sizeY==0)?1:sizeY); i++) {
>	 *ptr++ = colorMap[level][0];
>	 *ptr++ = colorMap[level][1];
>	 *ptr++ = colorMap[level][2];
>      }
>      glTexImage2D(GL_TEXTURE_2D, level++, GL_RGB, (sizeX==0)?1:sizeX,
>	    (sizeY==0)?1:sizeY, 0, GL_RGB, GL_FLOAT,
>	    (unsigned char *)buf);
>      sizeX /= 2;
>      sizeY /= 2;
>   }
>}
>
>void Draw(GLfloat sizeX, GLfloat sizeY)
>{
>   GLfloat x, y;
>
>      x =  (1.0 / sizeX);
>      y = (1.0 / sizeY) / 16;
>     
>     printf ("x, y: %f %f\n", x, y);
>         glBegin(GL_POLYGON);
>         glTexCoord2f(0.0, 0.0);
>         glVertex2f(0, 0);
>         glTexCoord2f(x, 0.0);
>         glVertex2f(0+1.0, 0);
>         glTexCoord2f(x, y);
>         glVertex2f(0+1.0, 1.0);
>         glTexCoord2f(0.0, y);
>         glVertex2f(0, 1.0);
>         glEnd();
>}
>
>
>void init(void)
>{
>   glClearColor(0.0, 0.0, 0.0, 0.0);
>   glDisable(GL_DITHER);
>   glEnable(GL_TEXTURE_2D);
>   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
>
>   buf = (GLfloat *)malloc(WINDSIZEX*WINDSIZEY*3*sizeof(GLfloat));
>
>   makeMipmap(TEXSIZEX, TEXSIZEY);
>}
>
>static void test(void)
>{    
>   int drawCount;
>
>//   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR);
>//   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 
>   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 
>
>   glClear(GL_COLOR_BUFFER_BIT);
>   glColor3f(0.5, 0.5, 0.5);
>   Draw(TEXSIZEX, TEXSIZEY);
>
>   glReadPixels(0, 0, 1, 1, GL_RGB, GL_FLOAT, buf);
>   printf("buf: %f, %f, %f\n", buf[0], buf[1], buf[2]);
>   printf("it should be: 1.0, 0.0, 0.0\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)
>{
>   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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Attachments on bug 13651: 13102

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