Attachment 10766 Details for Bug 11629 – test case

test case

tex_border.c (text/plain), 2.35 KB, created by WuNian on 2007-07-16 23:41:39 UTC

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Creator: WuNian

Created: 2007-07-16 23:41:39 UTC

Size: 2.35 KB

patch

obsolete

>#include <GL/glut.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <math.h>
>
>#define WINDSIZEX 100
>#define WINDSIZEY 100
>
>void Draw()
>{
>
>   GLint size =64;
>   GLint trueSize = size+2;
>
>      glBegin(GL_POLYGON);
>      glTexCoord2f(-1.0/(GLfloat)size, -1.0/(GLfloat)size);
>      glVertex2i(0, 0);
>      glTexCoord2f(-1.0/(GLfloat)size, 1.0+1.0/(GLfloat)size);
>      glVertex2i(0, trueSize);
>      glTexCoord2f(1.0+1.0/(GLfloat)size, 1.0+1.0/(GLfloat)size);
>      glVertex2i(trueSize, trueSize);
>      glTexCoord2f(1.0+1.0/(GLfloat)size, -1.0/(GLfloat)size);
>      glVertex2i(trueSize, 0);
>      glEnd();
>}
>
>void init(void)
>{
>   glClearColor(1.0, 1.0, 1.0, 1.0);
>   glDisable(GL_DITHER);
>   glBlendFunc (GL_ZERO, GL_SRC_ALPHA);
>
>   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
>
>   glTexParameterf(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
>   glTexParameterf(GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
>
>   glTexParameterf(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
>   glTexParameterf(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
>}
>
>static void test(void)
>{    
>   GLfloat buf[4];
>   GLfloat bcolor [] = {0.5, 0.8, 0.6, 0.4 };
>   GLfloat *texBuf, *readBuf;
>   int i;
>
>   texBuf = (GLfloat *)malloc(66*66*4*sizeof(GLfloat));   
>   readBuf = (GLfloat *)malloc(66*66*4*sizeof(GLfloat));   
>   for (i = 0; i < 64*64; i++) {
>      texBuf[i*4] = 0.6;
>      texBuf[i*4+1] = 0.7;
>      texBuf[i*4+2] = 0.6;
>      texBuf[i*4+3] = 0.6;
>   }
>
>   glEnable(GL_TEXTURE_1D);
>
>   glTexImage1D(GL_TEXTURE_1D, 0, GL_LUMINANCE,
>	 64, 0, GL_RGBA, GL_FLOAT, (unsigned char *)texBuf);
>   glTexParameterfv(GL_TEXTURE_1D, GL_TEXTURE_BORDER_COLOR, bcolor);
>
>   Draw();
>   glReadPixels(0, 0, 66, 66, GL_RGB, GL_FLOAT, readBuf);
>   printf ("pixels at border: %f %f %f \n", readBuf[0], readBuf[1], readBuf[2]);
>   printf ("it should be: 0.5, 0.5, 0.5\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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