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Added a 4th square to the output. Expanded the message written to the 

console.
This commit is contained in:
Ian Romanick 2004-05-11 19:59:13 +00:00
parent 5f6691f371
commit 939f6a724e
1 changed files with 31 additions and 6 deletions
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37
progs/tests/blendsquare.c
View File

@ -25,7 +25,7 @@
/**
* \file blendsquare.c
*
* Simple test of GL_NV_blend_square functionality. Three squares are drawn
* Simple test of GL_NV_blend_square functionality. Four squares are drawn
* with different blending modes, but all should be rendered with the same
* final color.
*
@ -36,7 +36,7 @@
#include <stdlib.h>
#include <GL/glut.h>
static int Width = 300;
static int Width = 400;
static int Height = 200;
static const GLfloat Near = 5.0, Far = 25.0;
@ -47,7 +47,8 @@ static void Display( void )
glClear( GL_COLOR_BUFFER_BIT );
glPushMatrix();
glTranslatef(-3.0, 0, 0);
glTranslatef(-4.5, 0, 0);
glBlendFunc( GL_ONE, GL_ZERO );
glBegin(GL_QUADS);
glColor3f( 0.5 * 0.5, 0.5 * 0.5, 0.5 * 0.5 );
@ -57,8 +58,9 @@ static void Display( void )
glVertex2f(-1, 1);
glEnd();
glTranslatef(3.0, 0, 0);
glBlendFunc( GL_SRC_COLOR, GL_ZERO );
glBlendFunc( GL_ONE, GL_ZERO );
glBegin(GL_QUADS);
glColor3f( 0.5, 0.5, 0.5 );
glVertex2f(-1, -1);
@ -67,6 +69,25 @@ static void Display( void )
glVertex2f(-1, 1);
glEnd();
glBlendFunc( GL_DST_COLOR, GL_ZERO );
glBegin(GL_QUADS);
glVertex2f(-1, -1);
glVertex2f( 1, -1);
glVertex2f( 1, 1);
glVertex2f(-1, 1);
glEnd();
glTranslatef(3.0, 0, 0);
glBlendFunc( GL_SRC_COLOR, GL_ZERO );
glBegin(GL_QUADS);
glVertex2f(-1, -1);
glVertex2f( 1, -1);
glVertex2f( 1, 1);
glVertex2f(-1, 1);
glEnd();
glTranslatef(3.0, 0, 0);
glBlendFunc( GL_ONE, GL_ZERO );
glBegin(GL_QUADS);
@ -120,7 +141,8 @@ static void Key( unsigned char key, int x, int y )
static void Init( void )
{
const char * const ver_string = (const char * const) glGetString( GL_VERSION );
const char * const ver_string = (const char * const)
glGetString( GL_VERSION );
const double version = strtod( ver_string, NULL );
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
@ -131,7 +153,10 @@ static void Init( void )
exit(1);
}
printf("All 3 squares should be the same color.\n");
printf("\nAll 4 squares should be the same color. The two on the left are drawn\n"
"without NV_blend_square functionality, and the two on the right are drawn\n"
"with NV_blend_square functionality. If the two on the left are dark, but\n"
"the two on the right are not, then NV_blend_square is broken.\n");
glEnable( GL_BLEND );
glBlendEquation( GL_FUNC_ADD );
}