Attachment 7146 Details for Bug 8410 – simple testcase showing broken glcolor3/glcolor4 behaviour

simple testcase showing broken glcolor3/glcolor4 behaviour

color34.c (text/plain), 2.20 KB, created by Roland Scheidegger on 2006-09-24 12:39:06 UTC

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Creator: Roland Scheidegger

Created: 2006-09-24 12:39:06 UTC

Size: 2.20 KB

patch

obsolete

>/*
> * Exercise glcolor3/glcolor4 bug within the same glBegin/End pair.
> */
>
>
>#define GL_GLEXT_PROTOTYPES
>#include <stdio.h>
>#include <stdlib.h>
>#include <math.h>
>#include <GL/glut.h>
>
>static int Width = 600;
>static int Height = 200;
>static GLfloat Near = 5.0, Far = 25.0;
>
>
>static void Display( void )
>{
>   GLfloat t;
>
>   glClearColor(0.2, 0.2, 0.8, 0);
>   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
>
>   for (t = 0.0; t <= 1.0; t += 0.25) {
>
>      glPushMatrix();
>         glTranslatef(t * 10.0 - 5.0, 0, 0);
>         glBegin(GL_TRIANGLE_STRIP);
>	 t < 0.5 ? glColor4f(1.0, 0.0, 0.0, 0.0) : glColor3f(1.0, 0.0, 0.0);
>         glVertex2f(-1, -1);
>	 t < 0.5 ? glColor3f(1.0, 0.0, 0.0) : glColor4f(1.0, 0.0, 0.0, 0.0);
>         glVertex2f( 1, -1);
>	 t < 0.5 ? glColor4f(1.0, 0.0, 0.0, 0.0) : glColor3f(1.0, 0.0, 0.0);
>         glVertex2f(-1,  1);
>	 t < 0.5 ? glColor3f(1.0, 0.0, 0.0) : glColor4f(1.0, 0.0, 0.0, 0.0);
>         glVertex2f( 1,  1);
>         glEnd();
>      glPopMatrix();
>   }
>   glutSwapBuffers();
>}
>
>
>static void Reshape( int width, int height )
>{
>   GLfloat ar = (float) width / (float) height;
>   Width = width;
>   Height = height;
>   glViewport( 0, 0, width, height );
>   glMatrixMode( GL_PROJECTION );
>   glLoadIdentity();
>   glFrustum( -ar, ar, -1.0, 1.0, Near, Far );
>   glMatrixMode( GL_MODELVIEW );
>   glLoadIdentity();
>   glTranslatef( 0.0, 0.0, -15.0 );
>}
>
>
>static void Key( unsigned char key, int x, int y )
>{
>   (void) x;
>   (void) y;
>   switch (key) {
>      case 27:
>         exit(0);
>         break;
>   }
>   glutPostRedisplay();
>}
>
>
>static void Init( void )
>{
>   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
>   printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
>   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
>   glEnable(GL_BLEND);
>   printf("Squares should be colored from white -> gray -> black.\n");
>}
>
>
>int main( int argc, char *argv[] )
>{
>   glutInit( &argc, argv );
>   glutInitWindowPosition( 0, 0 );
>   glutInitWindowSize( Width, Height );
>   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
>   glutCreateWindow(argv[0]);
>   glutReshapeFunc( Reshape );
>   glutKeyboardFunc( Key );
>   glutDisplayFunc( Display );
>   Init();
>   glutMainLoop();
>   return 0;
>}

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