Attachment 9660 Details for Bug 10687 – test case

test case

polygon.c (text/plain), 1.97 KB, created by WuNian on 2007-04-19 18:47:45 UTC

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Creator: WuNian

Created: 2007-04-19 18:47:45 UTC

Size: 1.97 KB

patch

obsolete

>#include <GL/glut.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <math.h>
>
>#define WINDSIZEX 100
>#define WINDSIZEY 100
>
>
>void init(void)
>{
>   GLfloat     blackColor[4] = {0.0, 0.0, 0.0, 1.0};
>   GLfloat     whiteColor[4] = {1.0, 1.0, 1.0, 1.0};
>
>   glDisable (GL_DITHER);
>
>   glEnable (GL_LIGHT0);   //LIGHT0 diffuse = WHITE
>   glEnable (GL_LIGHTING);
>
>   glMaterialfv (GL_FRONT_AND_BACK, GL_AMBIENT,  blackColor);
>   glMaterialfv (GL_FRONT_AND_BACK, GL_SPECULAR, blackColor);
>   glMaterialfv (GL_FRONT_AND_BACK, GL_DIFFUSE,  whiteColor);
>}
>
>static void test(void)
>{    
>   GLfloat buf[4];
>   GLfloat *allbuf;
>   GLfloat vbuf[] = {5.5, 6.5, 5.5, 12.5, 10.5, 6.5, 10.5, 12.5};
>   GLfloat position[4] =  {0, 0.6, 0.8, 0};
>   GLfloat nbuf[][3] = {{0.3, 0.4, 0.7}, {0.3, 0.4, 0.7}, {0.3, 0.4, 0.7}, {0.3, 0.4, 0.7}};
>
>   glPolygonMode (GL_FRONT_AND_BACK, GL_POINT);
>   glVertexPointer (2, GL_FLOAT, 0, vbuf);
>   glEnableClientState (GL_VERTEX_ARRAY);
>   glEnableClientState (GL_NORMAL_ARRAY);
>   glNormalPointer (GL_FLOAT, 0, nbuf);
>
>   glLightfv (GL_LIGHT0, GL_POSITION, position);
>
>   glClear (GL_COLOR_BUFFER_BIT);
>   glDrawArrays (GL_QUAD_STRIP, 0, 4);
>
>   allbuf = malloc(WINDSIZEX * WINDSIZEY * sizeof(GLfloat) * 3);
>   glReadPixels(0, 0, WINDSIZEX, WINDSIZEY, GL_RGB, GL_FLOAT, allbuf);
>
>
>   glReadPixels(5.5, 6.5, 1, 1, GL_RGBA, GL_FLOAT, buf);
>   // pixel should be 0*0.3+0.6*0.4+0.8*0.7=0.8
>   printf("draw pixel at (5.5, 6.5): %f %f %f, it should be 0.8\n", buf[0], buf[1], buf[2]);
>}
>
>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 10687: 9660

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