fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-30 20:50:09 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

use gray background, memset TempImage to white to help with debugging

Browse source
This commit is contained in:
Brian Paul 2000-10-16 21:24:39 +00:00
parent 35324a6c60
commit 1100b4daa3
1 changed files with 21 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
progs/demos/readpix.c
View file

@ -1,4 +1,4 @@
/* $Id: readpix.c,v 1.3 2000/03/31 01:01:31 brianp Exp $ */
/* $Id: readpix.c,v 1.4 2000/10/16 21:24:39 brianp Exp $ */
/*
* glReadPixels and glCopyPixels test
@ -8,6 +8,9 @@
/*
* $Log: readpix.c,v $
* Revision 1.4 2000/10/16 21:24:39 brianp
* use gray background, memset TempImage to white to help with debugging
*
* Revision 1.3 2000/03/31 01:01:31 brianp
* tweaks to allow different read formats/types
*
@ -43,11 +46,11 @@ static GLboolean ScaleAndBias = GL_FALSE;
static GLboolean Benchmark = GL_FALSE;
static GLubyte *TempImage = NULL;
#if 1
#if 0
#define ReadFormat ImgFormat
#define ReadType GL_UNSIGNED_BYTE
#endif
#if 0
#if 1
static GLenum ReadFormat = GL_RGBA;
static GLenum ReadType = GL_UNSIGNED_BYTE;
#endif
@ -55,6 +58,18 @@ static GLenum ReadType = GL_UNSIGNED_BYTE;
static GLenum ReadFormat = GL_RGB;
static GLenum ReadType = GL_UNSIGNED_SHORT_5_6_5;
#endif
#if 0
static GLenum ReadFormat = GL_RGBA;
static GLenum ReadType = GL_UNSIGNED_SHORT_1_5_5_5_REV;
#endif
#if 0
static GLenum ReadFormat = GL_BGRA;
static GLenum ReadType = GL_UNSIGNED_SHORT_5_5_5_1;
#endif
#if 0
static GLenum ReadFormat = GL_BGRA;
static GLenum ReadType = GL_UNSIGNED_SHORT_4_4_4_4_REV;
#endif
static void
@ -101,6 +116,7 @@ SetupPixelTransfer(GLboolean invert)
static void
Display( void )
{
glClearColor(.3, .3, .3, 1);
glClear( GL_COLOR_BUFFER_BIT );
glRasterPos2i(5, ImgHeight+25);
@ -137,6 +153,8 @@ Display( void )
Benchmark = GL_FALSE;
}
else {
/* clear the temporary image to white (helpful for debugging */
memset(TempImage, 255, ImgWidth * ImgHeight * 4);
glReadPixels(APosX, APosY, ImgWidth, ImgHeight,
ReadFormat, ReadType, TempImage);
}