Attachment 15113 Details for Bug 15006 – ths case code

ths case code

antialia.c (text/plain), 2.83 KB, created by Colin.Joe on 2008-03-14 02:25:40 UTC

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Creator: Colin.Joe

Created: 2008-03-14 02:25:40 UTC

Size: 2.83 KB

patch

obsolete

>#include <GL/glut.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <math.h>
>#include <time.h> 
>#define WINDSIZEX 100
>#define WINDSIZEY 100
>#define RANGE  WINDSIZEX*2.0/3.0 
>#define ERRORGENE 0.004044
>
>void init(void)
>{
>
>   glClearColor(0.0, 0.0, 0.0, 0.0);
>
>   glColor3f(1.0, 0.0, 0.0);
>    glDisable(GL_DITHER);
>    glEnable(GL_LINE_SMOOTH);
>    glEnable(GL_BLEND);
>    glBlendFunc(GL_SRC_ALPHA, GL_ONE);
>}
>
>
>
>
>static void test(void)
>{   GLfloat *buf;
>    buf = (GLfloat *)malloc(WINDSIZEX*WINDSIZEY*3*sizeof(GLfloat));
>    GLfloat v1[2], v2[2];
>     GLfloat angle, X, Y, sum,limit,saveSum,range;
>    GLfloat width;
>   GLint k,j;
> // glGetFloatv(GL_LINE_WIDTH_RANGE, widthRange);
> //  glGetFloatv(GL_LINE_WIDTH_GRANULARITY, &widthGranularity);
>    width = 1.0 ;
>    
>    srand( (unsigned)time( NULL ) ); 
>     v1[0] = 0.0;
>     v1[1] = 0.0;
>        v2[0] =  WINDSIZEX/4.0;
>        v2[1] = 0.0;
>        angle = rand()%360;
> // width = (width+widthGranularity < widthRange[1]) ?
>   //              width + widthGranularity : 1.0;
>        glLineWidth(width);
>        saveSum = v2[0]*width ;
>    for (k = 0; k < 8; k++) {
>            glClear(GL_COLOR_BUFFER_BIT);
>
>            glPushMatrix();
>            
>            X =rand()%RANGE+WINDSIZEY/3.0;
>            Y = rand()%RANGE+WINDSIZEY/3.0;
>           
>            glTranslatef(X, Y, 0.0);
>            glRotatef(angle, 0, 0, 1);
>
>            glBegin(GL_LINES);
>                glVertex2fv(v1);
>                glVertex2fv(v2);
>            glEnd();
>
>            glPopMatrix();
>            glFlush();
>
>            glReadPixels(0, 0, 100, 100, GL_RGB,GL_FLOAT, buf);
>            for (j = 0; j < 100*100*3; j += 3) {
>	
>                sum += buf[j];
>             }
>             limit = 2.0 * (0.25 + ERRORGENE)*(v2[0] + width);
>            printf ("\n coverage  is %f  idea coverage is is %f error margin is %f \n",
>                  sum,saveSum,limit); 
>            if (abs(saveSum-sum) > limit) {
>               printf ("\nthis case run failed, the translate cause Aliasing\n ");
>        
>              exit(-1) ;
>
>
>              }
>
>       }
>   printf ("test ok ");
>}
>
>
>
>
>
>
>
>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)
>{    
>   // GLfloat *buf;
>  //  buf = (GLfloat *)malloc(WINDSIZEX*WINDSIZEY*3*sizeof(GLfloat));
>   
>  
>   glutInit(&argc, argv);
>   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
>   glutInitWindowSize(WINDSIZEX, WINDSIZEY);
>   glutInitWindowPosition(100, 100);
>   glutCreateWindow(argv[0]);
>   init();
>  printf ("init ok");
>   glutDisplayFunc(display);
>   glutMainLoop();
>   return 0 ;
>}
>

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