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Added -clip option to test glCopyPixels beyond window bounds.

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Clear dest window to black before copying.
Use glWindowPos2iARB().
This commit is contained in:
Brian Paul 2006-10-16 23:22:44 +00:00
parent d40f20aebc
commit 8dff54e71d
1 changed files with 17 additions and 18 deletions
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35
progs/xdemos/wincopy.c
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@ -1,8 +1,8 @@
/*
* Mesa 3-D graphics library
* Version: 6.1
* Version: 6.5.2
*
* Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@ -32,6 +32,7 @@
*/
#define GL_GLEXT_PROTOTYPES
#define GLX_GLXEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glx.h>
@ -50,7 +51,7 @@ static int ScrNum;
static GLXContext Context;
static Window Win[2]; /* Win[0] = source, Win[1] = dest */
static GLint Width[2], Height[2];
static GLboolean TestClipping = GL_FALSE;
static GLfloat Angle = 0.0;
static GLboolean DrawFront = GL_FALSE;
@ -123,7 +124,7 @@ Redraw(void)
glMatrixMode(GL_MODELVIEW);
glShadeModel(GL_FLAT);
glClearColor(0.5, 0.5, 0.5, 1.0);
glClearColor(0.5, 0.5, 0.5, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
/* draw blue quad */
@ -150,22 +151,18 @@ Redraw(void)
return;
}
/* raster pos setup */
glViewport(0, 0, Width[1], Height[1]);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(-1, 1, -1, 1, -1, 1);
glRasterPos2f(-1, -1);
/* copy the image between windows */
glCopyPixels(0, 0, Width[0], Height[0], GL_COLOR);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
if (TestClipping) {
glWindowPos2iARB(-2, -2);
glCopyPixels(-2, -2, Width[0] + 4, Height[0] + 4, GL_COLOR);
}
else {
glWindowPos2iARB(0, 0);
glCopyPixels(0, 0, Width[0], Height[0], GL_COLOR);
}
if (DrawFront)
glFinish();
@ -309,6 +306,8 @@ Init(void)
int
main(int argc, char *argv[])
{
if (argc > 1 && strcmp(argv[1], "-clip") == 0)
TestClipping = GL_TRUE;
Init();
EventLoop();
return 0;