Attachment 15441 Details for Bug 15194 – test case

test case

polygonoffset.c (text/plain), 1.85 KB, created by WuNian on 2008-03-25 00:46:29 UTC

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Creator: WuNian

Created: 2008-03-25 00:46:29 UTC

Size: 1.85 KB

patch

obsolete

>#include <GL/glut.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <math.h>
>#include <string.h>
>
>#define WINDSIZEX 100
>#define WINDSIZEY 100
>
>#define SIZEW 4
>#define SIZEH 4
>
>// Draw function used by many test casses
>static void Draw()
>{
>   glBegin(GL_POLYGON);
>   glVertex3f(25.0, 25.0, 0.0);
>   glVertex3f(25.0, 75.0, 0.0);
>   glVertex3f(75.0, 75.0, 0.0);
>   glVertex3f(75.0, 25.0, 0.0);
>   glEnd();
>
>}
>
>
>void init(void)
>{
>   glClearColor (1,1,1,1);
>   glClearDepth(0.0);
>   glDisable (GL_DITHER);
>}
>
>static void test(void)
>{    
>   GLfloat buf[4];
>
>   glDepthFunc(GL_ALWAYS);
>   glEnable(GL_DEPTH_TEST);
>   glColor3f(0.0, 1.0, 0.0);
>   glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
>   glEnable(GL_POLYGON_OFFSET_FILL);
>   glEnable(GL_POLYGON_OFFSET_LINE);
>   glPolygonOffset(0.0, 3000.0);
>
>   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>   Draw();
>
>   //Find depth values at different edges of the polygon
>   glReadPixels(25, 50, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &buf[0]);
>   glReadPixels(50, 25, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &buf[1]);
>   glReadPixels(74, 75, 1, 1, GL_DEPTH_COMPONENT,GL_FLOAT,&buf[2]);
>   glReadPixels(40, 75, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &buf[3]);
>
>
>   printf("get depth values: %f %f %f %f\n", buf[0], buf[1], buf[2], buf[3]);
>   printf("should above 0\n");
>}
>
>void display(void)
>{
>   glViewport(0, 0, WINDSIZEX, WINDSIZEY);
>   glMatrixMode(GL_PROJECTION);
>   glLoadIdentity();
>   glOrtho(0, WINDSIZEX, 0, WINDSIZEY, 0, 1);
>   //gluOrtho2D(0, WINDSIZEX, 0, WINDSIZEY);
>   glMatrixMode(GL_MODELVIEW);
>   glLoadIdentity();
>
>   test();
>}
>
>int main(int argc, char** argv)
>{
>   glutInit(&argc, argv);
>   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
>   glutInitWindowSize(WINDSIZEX, WINDSIZEY);
>   glutInitWindowPosition(100, 100);
>   glutCreateWindow(argv[0]);
>   init();
>   glutDisplayFunc(display);
>   glutMainLoop();
>   return 0; 
>}

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Attachments on bug 15194: 15441

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