Attachment 9960 Details for Bug 10939 – test case

test case

antialiasing_point.c (text/plain), 1.60 KB, created by WuNian on 2007-05-13 23:34:48 UTC

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Creator: WuNian

Created: 2007-05-13 23:34:48 UTC

Size: 1.60 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     sizeRange[2], sizeStep;
>
>   glClearColor(0.0, 0.0, 0.0, 0.0);
>   glColor4f(1.0, 0.0, 0.0, 1.0);
>
>   glDisable(GL_DITHER);
>
>   glEnable(GL_POINT_SMOOTH);
>
>   glEnable(GL_BLEND);
>   glBlendFunc(GL_SRC_ALPHA, GL_ONE);
>
>   // Get min and max point sizes
>   glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, sizeRange);
>   if (glGetError() != GL_NO_ERROR) {
>      glGetFloatv(GL_POINT_SIZE_RANGE, sizeRange);
>   }
>
>   // Get granularity between min and max
>   glGetFloatv(GL_POINT_SIZE_GRANULARITY, &sizeStep);
>
>   printf("size range: %f %f; size step: %f \n", 
>	sizeRange[0], sizeRange[1], sizeStep);
>}
>
>static void test(void)
>{    
>   GLfloat buf[25];
>   int row, col;
>
>   glPointSize(3);
>   glClear(GL_COLOR_BUFFER_BIT);
>   glBegin(GL_POINTS);
>   glVertex2f(2.5, 2.5);
>   glEnd();
>   glReadPixels(0, 0, 5, 5, GL_RED, GL_FLOAT, buf);
>   for (row = 0; row < 5; row++)
>      for (col = 0; col < 5; col++)
>	 printf("draw pixel at (%d, %d): %f\n", row, col, buf[row*5+col]);
>}
>
>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 10939: 9960

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