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![Jérôme Gardou](/assets/img/avatar_default.png)
With this commit, we now use a forked version of MESA which only supports OpenGL 1.1, like the windows implementation does. It exposes : - The same pixel formats - The same set of extensions - Nothing more All of this without taking 10% of your build time. If you need a more modern option, look at the MESA package from Rapps, which is (and must be) maintained outside of this code tree. CORE-7499
1891 lines
60 KiB
C
1891 lines
60 KiB
C
/* $Id: teximage.c,v 1.35 1998/02/07 14:36:41 brianp Exp $ */
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/*
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* Mesa 3-D graphics library
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* Version: 2.6
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* Copyright (C) 1995-1997 Brian Paul
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* $Log: teximage.c,v $
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* Revision 1.35 1998/02/07 14:36:41 brianp
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* fixed bug when passing NULL proxy image to glTexImageXD() (Wes Bethel)
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*
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* Revision 1.34 1998/01/16 03:46:07 brianp
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* fixed a few Windows compilation warnings (Theodore Jump)
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*
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* Revision 1.33 1997/12/31 06:10:03 brianp
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* added Henk Kok's texture validation optimization (AnyDirty flag)
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*
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* Revision 1.32 1997/12/07 17:30:39 brianp
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* added DavidB's patches for v0.21 driver (TexSubImage)
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*
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* Revision 1.31 1997/11/07 03:38:07 brianp
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* added stdio.h include for SunOS 4.x
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*
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* Revision 1.30 1997/11/02 20:20:30 brianp
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* rewrote gl_TexSubImage[123]D()
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*
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* Revision 1.29 1997/10/16 01:14:04 brianp
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* removed teximage Dirty flag
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*
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* Revision 1.28 1997/10/14 00:40:20 brianp
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* added DavidB's v19 fxmesa changes
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*
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* Revision 1.27 1997/09/29 23:28:14 brianp
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* updated for new device driver texture functions
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*
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* Revision 1.26 1997/09/28 15:29:03 brianp
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* initialize image->Depth = 1 in read_color_image() (Hiroki Honda)
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*
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* Revision 1.25 1997/09/27 00:14:39 brianp
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* added GL_EXT_paletted_texture extension
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*
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* Revision 1.24 1997/09/03 13:17:17 brianp
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* added a few pointer casts
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*
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* Revision 1.23 1997/08/23 18:40:46 brianp
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* glTexImage[123]D() with NULL image pointer is correctly handled now
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*
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* Revision 1.22 1997/08/11 01:23:29 brianp
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* added a few pointer casts
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*
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* Revision 1.21 1997/07/24 01:25:34 brianp
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* changed precompiled header symbol from PCH to PC_HEADER
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*
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* Revision 1.20 1997/07/05 16:21:17 brianp
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* fixed unitialized variable bug in gl_TexSubImage1D()
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*
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* Revision 1.19 1997/06/24 01:13:53 brianp
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* call gl_free_image() in gl_TexSubImage[123]D() if ref count==0
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*
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* Revision 1.18 1997/06/04 00:33:14 brianp
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* fixed reference count bug in gl_CopyTexImage1/2D() (Randy Frank)
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*
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* Revision 1.17 1997/05/28 03:26:49 brianp
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* added precompiled header (PCH) support
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*
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* Revision 1.16 1997/05/03 00:52:19 brianp
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* set texture object Dirty flag when changing texture image
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*
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* Revision 1.15 1997/04/20 20:29:11 brianp
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* replaced abort() with gl_problem()
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*
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* Revision 1.14 1997/03/04 19:18:29 brianp
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* added texture image Width2, Height2, and Depth2 fields
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*
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* Revision 1.13 1997/02/27 19:58:08 brianp
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* call gl_problem() instead of gl_warning()
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*
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* Revision 1.12 1997/02/09 18:53:05 brianp
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* added GL_EXT_texture3D support
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*
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* Revision 1.11 1997/01/16 03:35:10 brianp
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* added calls to device driver TexImage() function
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*
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* Revision 1.10 1997/01/09 21:26:46 brianp
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* gl_TexImage[12]D() didn't free the incoming image- a memory leak
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*
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* Revision 1.9 1997/01/09 19:55:52 brianp
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* fixed a few error messages
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*
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* Revision 1.8 1997/01/09 19:49:18 brianp
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* better error checking
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*
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* Revision 1.7 1996/12/02 18:59:54 brianp
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* added code to handle GL_COLOR_INDEX textures, per Randy Frank
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*
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* Revision 1.6 1996/11/07 04:13:24 brianp
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* all new texture image handling, now pixel scale, bias, mapping work
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*
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* Revision 1.5 1996/09/27 01:29:57 brianp
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* removed unused variables, fixed cut&paste bug in color scaling
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*
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* Revision 1.4 1996/09/26 22:35:10 brianp
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* fixed a few compiler warnings from IRIX 6 -n32 and -64 compiler
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*
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* Revision 1.3 1996/09/15 14:18:55 brianp
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* now use GLframebuffer and GLvisual
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*
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* Revision 1.2 1996/09/15 01:48:58 brianp
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* removed #define NULL 0
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*
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* Revision 1.1 1996/09/13 01:38:16 brianp
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* Initial revision
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*
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*/
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#ifdef PC_HEADER
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#include "all.h"
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#else
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "context.h"
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#include "image.h"
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#include "macros.h"
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#include "pixel.h"
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#include "span.h"
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#include "teximage.h"
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#include "types.h"
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#endif
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/*
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* NOTES:
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*
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* The internal texture storage convension is an array of N GLubytes
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* where N = width * height * components. There is no padding.
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*/
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/*
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* Compute log base 2 of n.
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* If n isn't an exact power of two return -1.
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* If n<0 return -1.
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*/
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static int logbase2( int n )
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{
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GLint i = 1;
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GLint log2 = 0;
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if (n<0) {
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return -1;
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}
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while ( n > i ) {
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i *= 2;
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log2++;
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}
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if (i != n) {
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return -1;
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}
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else {
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return log2;
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}
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}
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/*
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* Given an internal texture format enum or 1, 2, 3, 4 return the
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* corresponding _base_ internal format: GL_ALPHA, GL_LUMINANCE,
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* GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA. Return -1 if
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* invalid enum.
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*/
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static GLint decode_internal_format( GLint format )
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{
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switch (format) {
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case GL_ALPHA:
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case GL_ALPHA4:
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case GL_ALPHA8:
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case GL_ALPHA12:
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case GL_ALPHA16:
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return GL_ALPHA;
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case 1:
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case GL_LUMINANCE:
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case GL_LUMINANCE4:
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case GL_LUMINANCE8:
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case GL_LUMINANCE12:
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case GL_LUMINANCE16:
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return GL_LUMINANCE;
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case 2:
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case GL_LUMINANCE_ALPHA:
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case GL_LUMINANCE4_ALPHA4:
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case GL_LUMINANCE6_ALPHA2:
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case GL_LUMINANCE8_ALPHA8:
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case GL_LUMINANCE12_ALPHA4:
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case GL_LUMINANCE12_ALPHA12:
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case GL_LUMINANCE16_ALPHA16:
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return GL_LUMINANCE_ALPHA;
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case GL_INTENSITY:
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case GL_INTENSITY4:
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case GL_INTENSITY8:
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case GL_INTENSITY12:
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case GL_INTENSITY16:
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return GL_INTENSITY;
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case 3:
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case GL_RGB:
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case GL_R3_G3_B2:
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case GL_RGB4:
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case GL_RGB5:
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case GL_RGB8:
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case GL_RGB10:
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case GL_RGB12:
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case GL_RGB16:
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return GL_RGB;
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case 4:
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case GL_RGBA:
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case GL_RGBA2:
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case GL_RGBA4:
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case GL_RGB5_A1:
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case GL_RGBA8:
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case GL_RGB10_A2:
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case GL_RGBA12:
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case GL_RGBA16:
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return GL_RGBA;
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case GL_COLOR_INDEX1_EXT:
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case GL_COLOR_INDEX2_EXT:
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case GL_COLOR_INDEX4_EXT:
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case GL_COLOR_INDEX8_EXT:
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case GL_COLOR_INDEX12_EXT:
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case GL_COLOR_INDEX16_EXT:
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return GL_COLOR_INDEX;
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default:
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return -1; /* error */
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}
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}
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/*
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* Given an internal texture format enum or 1, 2, 3, 4 return the
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* corresponding _base_ internal format: GL_ALPHA, GL_LUMINANCE,
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* GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA. Return the
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* number of components for the format. Return -1 if invalid enum.
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*/
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static GLint components_in_intformat( GLint format )
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{
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switch (format) {
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case GL_ALPHA:
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case GL_ALPHA4:
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case GL_ALPHA8:
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case GL_ALPHA12:
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case GL_ALPHA16:
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return 1;
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case 1:
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case GL_LUMINANCE:
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case GL_LUMINANCE4:
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case GL_LUMINANCE8:
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case GL_LUMINANCE12:
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case GL_LUMINANCE16:
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return 1;
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case 2:
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case GL_LUMINANCE_ALPHA:
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case GL_LUMINANCE4_ALPHA4:
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case GL_LUMINANCE6_ALPHA2:
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case GL_LUMINANCE8_ALPHA8:
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case GL_LUMINANCE12_ALPHA4:
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case GL_LUMINANCE12_ALPHA12:
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case GL_LUMINANCE16_ALPHA16:
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return 2;
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case GL_INTENSITY:
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case GL_INTENSITY4:
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case GL_INTENSITY8:
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case GL_INTENSITY12:
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case GL_INTENSITY16:
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return 1;
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case 3:
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case GL_RGB:
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case GL_R3_G3_B2:
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case GL_RGB4:
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case GL_RGB5:
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case GL_RGB8:
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case GL_RGB10:
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case GL_RGB12:
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case GL_RGB16:
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return 3;
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case 4:
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case GL_RGBA:
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case GL_RGBA2:
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case GL_RGBA4:
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case GL_RGB5_A1:
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case GL_RGBA8:
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case GL_RGB10_A2:
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case GL_RGBA12:
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case GL_RGBA16:
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return 4;
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case GL_COLOR_INDEX1_EXT:
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case GL_COLOR_INDEX2_EXT:
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case GL_COLOR_INDEX4_EXT:
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case GL_COLOR_INDEX8_EXT:
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case GL_COLOR_INDEX12_EXT:
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case GL_COLOR_INDEX16_EXT:
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return 1;
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default:
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return -1; /* error */
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}
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}
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struct gl_texture_image *gl_alloc_texture_image( void )
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{
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return (struct gl_texture_image *) calloc( 1, sizeof(struct gl_texture_image) );
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}
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void gl_free_texture_image( struct gl_texture_image *teximage )
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{
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if (teximage->Data) {
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free( teximage->Data );
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}
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free( teximage );
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}
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/*
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* Given a gl_image, apply the pixel transfer scale, bias, and mapping
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* to produce a gl_texture_image. Convert image data to GLubytes.
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* Input: image - the incoming gl_image
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* internalFormat - desired format of resultant texture
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* border - texture border width (0 or 1)
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* Return: pointer to a gl_texture_image or NULL if an error occurs.
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*/
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static struct gl_texture_image *
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image_to_texture( GLcontext *ctx, const struct gl_image *image,
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GLenum internalFormat, GLint border )
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{
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GLint components;
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struct gl_texture_image *texImage;
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GLint numPixels, pixel;
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GLboolean scaleOrBias;
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assert(image);
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assert(image->Width>0);
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assert(image->Height>0);
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/* internalFormat = decode_internal_format(internalFormat);*/
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components = components_in_intformat(internalFormat);
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numPixels = image->Width * image->Height;
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texImage = gl_alloc_texture_image();
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if (!texImage)
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return NULL;
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texImage->Format = decode_internal_format(internalFormat);
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texImage->IntFormat = internalFormat;
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texImage->Border = border;
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texImage->Width = image->Width;
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texImage->Height = image->Height;
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texImage->WidthLog2 = logbase2(image->Width - 2*border);
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if (image->Height==1) /* 1-D texture */
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texImage->HeightLog2 = 0;
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else
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texImage->HeightLog2 = logbase2(image->Height - 2*border);
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texImage->Width2 = 1 << texImage->WidthLog2;
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texImage->Height2 = 1 << texImage->HeightLog2;
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texImage->MaxLog2 = MAX2( texImage->WidthLog2, texImage->HeightLog2 );
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texImage->Data = (GLubyte *) malloc( numPixels * components );
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assert(texImage->WidthLog2>=0);
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assert(texImage->HeightLog2>=0);
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if (!texImage->Data) {
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/* out of memory */
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gl_free_texture_image( texImage );
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return NULL;
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}
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/* Determine if scaling and/or biasing is needed */
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if (ctx->Pixel.RedScale!=1.0F || ctx->Pixel.RedBias!=0.0F ||
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ctx->Pixel.GreenScale!=1.0F || ctx->Pixel.GreenBias!=0.0F ||
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ctx->Pixel.BlueScale!=1.0F || ctx->Pixel.BlueBias!=0.0F ||
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ctx->Pixel.AlphaScale!=1.0F || ctx->Pixel.AlphaBias!=0.0F) {
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scaleOrBias = GL_TRUE;
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}
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else {
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scaleOrBias = GL_FALSE;
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}
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switch (image->Type) {
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case GL_BITMAP:
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{
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GLint shift = ctx->Pixel.IndexShift;
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GLint offset = ctx->Pixel.IndexOffset;
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/* MapIto[RGBA]Size must be powers of two */
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GLint rMask = ctx->Pixel.MapItoRsize-1;
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GLint gMask = ctx->Pixel.MapItoGsize-1;
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GLint bMask = ctx->Pixel.MapItoBsize-1;
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GLint aMask = ctx->Pixel.MapItoAsize-1;
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GLint i, j;
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GLubyte *srcPtr = (GLubyte *) image->Data;
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assert( image->Format==GL_COLOR_INDEX );
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for (j=0; j<image->Height; j++) {
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GLubyte bitMask = 128;
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for (i=0; i<image->Width; i++) {
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GLint index;
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GLubyte red, green, blue, alpha;
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/* Fetch image color index */
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index = (*srcPtr & bitMask) ? 1 : 0;
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bitMask = bitMask >> 1;
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if (bitMask==0) {
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bitMask = 128;
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srcPtr++;
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}
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/* apply index shift and offset */
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if (shift>=0) {
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index = (index << shift) + offset;
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}
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else {
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index = (index >> -shift) + offset;
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}
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/* convert index to RGBA */
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red = (GLint) (ctx->Pixel.MapItoR[index & rMask] * 255.0F);
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green = (GLint) (ctx->Pixel.MapItoG[index & gMask] * 255.0F);
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blue = (GLint) (ctx->Pixel.MapItoB[index & bMask] * 255.0F);
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alpha = (GLint) (ctx->Pixel.MapItoA[index & aMask] * 255.0F);
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/* store texel (components are GLubytes in [0,255]) */
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pixel = j * image->Width + i;
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switch (texImage->Format) {
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case GL_ALPHA:
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texImage->Data[pixel] = alpha;
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break;
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case GL_LUMINANCE:
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texImage->Data[pixel] = red;
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break;
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case GL_LUMINANCE_ALPHA:
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texImage->Data[pixel*2+0] = red;
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texImage->Data[pixel*2+1] = alpha;
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break;
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case GL_INTENSITY:
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texImage->Data[pixel] = red;
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break;
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case GL_RGB:
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texImage->Data[pixel*3+0] = red;
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texImage->Data[pixel*3+1] = green;
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texImage->Data[pixel*3+2] = blue;
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break;
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case GL_RGBA:
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texImage->Data[pixel*4+0] = red;
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texImage->Data[pixel*4+1] = green;
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texImage->Data[pixel*4+2] = blue;
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texImage->Data[pixel*4+3] = alpha;
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break;
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default:
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gl_problem(ctx,"Bad format in image_to_texture");
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return NULL;
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}
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}
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if (bitMask!=128) {
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srcPtr++;
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}
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}
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}
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break;
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case GL_UNSIGNED_BYTE:
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for (pixel=0; pixel<numPixels; pixel++) {
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GLubyte red, green, blue, alpha;
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switch (image->Format) {
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|
case GL_COLOR_INDEX:
|
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if (decode_internal_format(internalFormat)==GL_COLOR_INDEX) {
|
|
/* a paletted texture */
|
|
GLint index = ((GLubyte*)image->Data)[pixel];
|
|
red = index;
|
|
}
|
|
else {
|
|
/* convert color index to RGBA */
|
|
GLint index = ((GLubyte*)image->Data)[pixel];
|
|
red = 255.0F * ctx->Pixel.MapItoR[index];
|
|
green = 255.0F * ctx->Pixel.MapItoG[index];
|
|
blue = 255.0F * ctx->Pixel.MapItoB[index];
|
|
alpha = 255.0F * ctx->Pixel.MapItoA[index];
|
|
}
|
|
break;
|
|
case GL_RGB:
|
|
/* Fetch image RGBA values */
|
|
red = ((GLubyte*) image->Data)[pixel*3+0];
|
|
green = ((GLubyte*) image->Data)[pixel*3+1];
|
|
blue = ((GLubyte*) image->Data)[pixel*3+2];
|
|
alpha = 255;
|
|
break;
|
|
case GL_BGR_EXT:
|
|
blue = ((GLubyte*) image->Data)[pixel*3+0];
|
|
green = ((GLubyte*) image->Data)[pixel*3+1];
|
|
red = ((GLubyte*) image->Data)[pixel*3+2];
|
|
alpha = 255;
|
|
break;
|
|
case GL_RGBA:
|
|
red = ((GLubyte*) image->Data)[pixel*4+0];
|
|
green = ((GLubyte*) image->Data)[pixel*4+1];
|
|
blue = ((GLubyte*) image->Data)[pixel*4+2];
|
|
alpha = ((GLubyte*) image->Data)[pixel*4+3];
|
|
break;
|
|
case GL_BGRA_EXT:
|
|
blue = ((GLubyte*) image->Data)[pixel*4+0];
|
|
green = ((GLubyte*) image->Data)[pixel*4+1];
|
|
red = ((GLubyte*) image->Data)[pixel*4+2];
|
|
alpha = ((GLubyte*) image->Data)[pixel*4+3];
|
|
break;
|
|
case GL_RED:
|
|
red = ((GLubyte*) image->Data)[pixel];
|
|
green = 0;
|
|
blue = 0;
|
|
alpha = 255;
|
|
break;
|
|
case GL_GREEN:
|
|
red = 0;
|
|
green = ((GLubyte*) image->Data)[pixel];
|
|
blue = 0;
|
|
alpha = 255;
|
|
break;
|
|
case GL_BLUE:
|
|
red = 0;
|
|
green = 0;
|
|
blue = ((GLubyte*) image->Data)[pixel];
|
|
alpha = 255;
|
|
break;
|
|
case GL_ALPHA:
|
|
red = 0;
|
|
green = 0;
|
|
blue = 0;
|
|
alpha = ((GLubyte*) image->Data)[pixel];
|
|
break;
|
|
case GL_LUMINANCE:
|
|
red = ((GLubyte*) image->Data)[pixel];
|
|
green = red;
|
|
blue = red;
|
|
alpha = 255;
|
|
break;
|
|
case GL_LUMINANCE_ALPHA:
|
|
red = ((GLubyte*) image->Data)[pixel*2+0];
|
|
green = red;
|
|
blue = red;
|
|
alpha = ((GLubyte*) image->Data)[pixel*2+1];
|
|
break;
|
|
default:
|
|
gl_problem(ctx,"Bad format (2) in image_to_texture");
|
|
return NULL;
|
|
}
|
|
|
|
if (scaleOrBias || ctx->Pixel.MapColorFlag) {
|
|
/* Apply RGBA scale and bias */
|
|
GLfloat r = red * (1.0F/255.0F);
|
|
GLfloat g = green * (1.0F/255.0F);
|
|
GLfloat b = blue * (1.0F/255.0F);
|
|
GLfloat a = alpha * (1.0F/255.0F);
|
|
if (scaleOrBias) {
|
|
/* r,g,b,a now in [0,1] */
|
|
r = r * ctx->Pixel.RedScale + ctx->Pixel.RedBias;
|
|
g = g * ctx->Pixel.GreenScale + ctx->Pixel.GreenBias;
|
|
b = b * ctx->Pixel.BlueScale + ctx->Pixel.BlueBias;
|
|
a = a * ctx->Pixel.AlphaScale + ctx->Pixel.AlphaBias;
|
|
r = CLAMP( r, 0.0F, 1.0F );
|
|
g = CLAMP( g, 0.0F, 1.0F );
|
|
b = CLAMP( b, 0.0F, 1.0F );
|
|
a = CLAMP( a, 0.0F, 1.0F );
|
|
}
|
|
/* Apply pixel maps */
|
|
if (ctx->Pixel.MapColorFlag) {
|
|
GLint ir = (GLint) (r*ctx->Pixel.MapRtoRsize);
|
|
GLint ig = (GLint) (g*ctx->Pixel.MapGtoGsize);
|
|
GLint ib = (GLint) (b*ctx->Pixel.MapBtoBsize);
|
|
GLint ia = (GLint) (a*ctx->Pixel.MapAtoAsize);
|
|
r = ctx->Pixel.MapRtoR[ir];
|
|
g = ctx->Pixel.MapGtoG[ig];
|
|
b = ctx->Pixel.MapBtoB[ib];
|
|
a = ctx->Pixel.MapAtoA[ia];
|
|
}
|
|
red = (GLint) (r * 255.0F);
|
|
green = (GLint) (g * 255.0F);
|
|
blue = (GLint) (b * 255.0F);
|
|
alpha = (GLint) (a * 255.0F);
|
|
}
|
|
|
|
/* store texel (components are GLubytes in [0,255]) */
|
|
switch (texImage->Format) {
|
|
case GL_COLOR_INDEX:
|
|
texImage->Data[pixel] = red; /* really an index */
|
|
break;
|
|
case GL_ALPHA:
|
|
texImage->Data[pixel] = alpha;
|
|
break;
|
|
case GL_LUMINANCE:
|
|
texImage->Data[pixel] = red;
|
|
break;
|
|
case GL_LUMINANCE_ALPHA:
|
|
texImage->Data[pixel*2+0] = red;
|
|
texImage->Data[pixel*2+1] = alpha;
|
|
break;
|
|
case GL_INTENSITY:
|
|
texImage->Data[pixel] = red;
|
|
break;
|
|
case GL_RGB:
|
|
texImage->Data[pixel*3+0] = red;
|
|
texImage->Data[pixel*3+1] = green;
|
|
texImage->Data[pixel*3+2] = blue;
|
|
break;
|
|
case GL_RGBA:
|
|
texImage->Data[pixel*4+0] = red;
|
|
texImage->Data[pixel*4+1] = green;
|
|
texImage->Data[pixel*4+2] = blue;
|
|
texImage->Data[pixel*4+3] = alpha;
|
|
break;
|
|
default:
|
|
gl_problem(ctx,"Bad format (3) in image_to_texture");
|
|
return NULL;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case GL_FLOAT:
|
|
for (pixel=0; pixel<numPixels; pixel++) {
|
|
GLfloat red, green, blue, alpha;
|
|
switch (texImage->Format) {
|
|
case GL_COLOR_INDEX:
|
|
if (decode_internal_format(internalFormat)==GL_COLOR_INDEX) {
|
|
/* a paletted texture */
|
|
GLint index = (GLint) ((GLfloat*) image->Data)[pixel];
|
|
red = index;
|
|
}
|
|
else {
|
|
GLint shift = ctx->Pixel.IndexShift;
|
|
GLint offset = ctx->Pixel.IndexOffset;
|
|
/* MapIto[RGBA]Size must be powers of two */
|
|
GLint rMask = ctx->Pixel.MapItoRsize-1;
|
|
GLint gMask = ctx->Pixel.MapItoGsize-1;
|
|
GLint bMask = ctx->Pixel.MapItoBsize-1;
|
|
GLint aMask = ctx->Pixel.MapItoAsize-1;
|
|
/* Fetch image color index */
|
|
GLint index = (GLint) ((GLfloat*) image->Data)[pixel];
|
|
/* apply index shift and offset */
|
|
if (shift>=0) {
|
|
index = (index << shift) + offset;
|
|
}
|
|
else {
|
|
index = (index >> -shift) + offset;
|
|
}
|
|
/* convert index to RGBA */
|
|
red = ctx->Pixel.MapItoR[index & rMask];
|
|
green = ctx->Pixel.MapItoG[index & gMask];
|
|
blue = ctx->Pixel.MapItoB[index & bMask];
|
|
alpha = ctx->Pixel.MapItoA[index & aMask];
|
|
}
|
|
break;
|
|
case GL_RGB:
|
|
/* Fetch image RGBA values */
|
|
red = ((GLfloat*) image->Data)[pixel*3+0];
|
|
green = ((GLfloat*) image->Data)[pixel*3+1];
|
|
blue = ((GLfloat*) image->Data)[pixel*3+2];
|
|
alpha = 1.0;
|
|
break;
|
|
case GL_RGBA:
|
|
red = ((GLfloat*) image->Data)[pixel*4+0];
|
|
green = ((GLfloat*) image->Data)[pixel*4+1];
|
|
blue = ((GLfloat*) image->Data)[pixel*4+2];
|
|
alpha = ((GLfloat*) image->Data)[pixel*4+3];
|
|
break;
|
|
case GL_RED:
|
|
red = ((GLfloat*) image->Data)[pixel];
|
|
green = 0.0;
|
|
blue = 0.0;
|
|
alpha = 1.0;
|
|
break;
|
|
case GL_GREEN:
|
|
red = 0.0;
|
|
green = ((GLfloat*) image->Data)[pixel];
|
|
blue = 0.0;
|
|
alpha = 1.0;
|
|
break;
|
|
case GL_BLUE:
|
|
red = 0.0;
|
|
green = 0.0;
|
|
blue = ((GLfloat*) image->Data)[pixel];
|
|
alpha = 1.0;
|
|
break;
|
|
case GL_ALPHA:
|
|
red = 0.0;
|
|
green = 0.0;
|
|
blue = 0.0;
|
|
alpha = ((GLfloat*) image->Data)[pixel];
|
|
break;
|
|
case GL_LUMINANCE:
|
|
red = ((GLfloat*) image->Data)[pixel];
|
|
green = red;
|
|
blue = red;
|
|
alpha = 1.0;
|
|
break;
|
|
case GL_LUMINANCE_ALPHA:
|
|
red = ((GLfloat*) image->Data)[pixel*2+0];
|
|
green = red;
|
|
blue = red;
|
|
alpha = ((GLfloat*) image->Data)[pixel*2+1];
|
|
break;
|
|
default:
|
|
gl_problem(ctx,"Bad format (4) in image_to_texture");
|
|
return NULL;
|
|
}
|
|
|
|
if (image->Format!=GL_COLOR_INDEX) {
|
|
/* Apply RGBA scale and bias */
|
|
if (scaleOrBias) {
|
|
red = red * ctx->Pixel.RedScale + ctx->Pixel.RedBias;
|
|
green = green * ctx->Pixel.GreenScale + ctx->Pixel.GreenBias;
|
|
blue = blue * ctx->Pixel.BlueScale + ctx->Pixel.BlueBias;
|
|
alpha = alpha * ctx->Pixel.AlphaScale + ctx->Pixel.AlphaBias;
|
|
red = CLAMP( red, 0.0F, 1.0F );
|
|
green = CLAMP( green, 0.0F, 1.0F );
|
|
blue = CLAMP( blue, 0.0F, 1.0F );
|
|
alpha = CLAMP( alpha, 0.0F, 1.0F );
|
|
}
|
|
/* Apply pixel maps */
|
|
if (ctx->Pixel.MapColorFlag) {
|
|
GLint ir = (GLint) (red *ctx->Pixel.MapRtoRsize);
|
|
GLint ig = (GLint) (green*ctx->Pixel.MapGtoGsize);
|
|
GLint ib = (GLint) (blue *ctx->Pixel.MapBtoBsize);
|
|
GLint ia = (GLint) (alpha*ctx->Pixel.MapAtoAsize);
|
|
red = ctx->Pixel.MapRtoR[ir];
|
|
green = ctx->Pixel.MapGtoG[ig];
|
|
blue = ctx->Pixel.MapBtoB[ib];
|
|
alpha = ctx->Pixel.MapAtoA[ia];
|
|
}
|
|
}
|
|
|
|
/* store texel (components are GLubytes in [0,255]) */
|
|
switch (texImage->Format) {
|
|
case GL_COLOR_INDEX:
|
|
/* a paletted texture */
|
|
texImage->Data[pixel] = (GLint) (red * 255.0F);
|
|
break;
|
|
case GL_ALPHA:
|
|
texImage->Data[pixel] = (GLint) (alpha * 255.0F);
|
|
break;
|
|
case GL_LUMINANCE:
|
|
texImage->Data[pixel] = (GLint) (red * 255.0F);
|
|
break;
|
|
case GL_LUMINANCE_ALPHA:
|
|
texImage->Data[pixel*2+0] = (GLint) (red * 255.0F);
|
|
texImage->Data[pixel*2+1] = (GLint) (alpha * 255.0F);
|
|
break;
|
|
case GL_INTENSITY:
|
|
texImage->Data[pixel] = (GLint) (red * 255.0F);
|
|
break;
|
|
case GL_RGB:
|
|
texImage->Data[pixel*3+0] = (GLint) (red * 255.0F);
|
|
texImage->Data[pixel*3+1] = (GLint) (green * 255.0F);
|
|
texImage->Data[pixel*3+2] = (GLint) (blue * 255.0F);
|
|
break;
|
|
case GL_RGBA:
|
|
texImage->Data[pixel*4+0] = (GLint) (red * 255.0F);
|
|
texImage->Data[pixel*4+1] = (GLint) (green * 255.0F);
|
|
texImage->Data[pixel*4+2] = (GLint) (blue * 255.0F);
|
|
texImage->Data[pixel*4+3] = (GLint) (alpha * 255.0F);
|
|
break;
|
|
default:
|
|
gl_problem(ctx,"Bad format (5) in image_to_texture");
|
|
return NULL;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
gl_problem(ctx, "Bad image type in image_to_texture");
|
|
return NULL;
|
|
}
|
|
|
|
return texImage;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* glTexImage[123]D can accept a NULL image pointer. In this case we
|
|
* create a texture image with unspecified image contents per the OpenGL
|
|
* spec.
|
|
*/
|
|
static struct gl_texture_image *
|
|
make_null_texture( GLcontext *ctx, GLenum internalFormat,
|
|
GLsizei width, GLsizei height, GLsizei depth, GLint border )
|
|
{
|
|
GLint components;
|
|
struct gl_texture_image *texImage;
|
|
GLint numPixels;
|
|
|
|
/*internalFormat = decode_internal_format(internalFormat);*/
|
|
components = components_in_intformat(internalFormat);
|
|
numPixels = width * height * depth;
|
|
|
|
texImage = gl_alloc_texture_image();
|
|
if (!texImage)
|
|
return NULL;
|
|
|
|
texImage->Format = decode_internal_format(internalFormat);
|
|
texImage->IntFormat = internalFormat;
|
|
texImage->Border = border;
|
|
texImage->Width = width;
|
|
texImage->Height = height;
|
|
texImage->WidthLog2 = logbase2(width - 2*border);
|
|
if (height==1) /* 1-D texture */
|
|
texImage->HeightLog2 = 0;
|
|
else
|
|
texImage->HeightLog2 = logbase2(height - 2*border);
|
|
texImage->Width2 = 1 << texImage->WidthLog2;
|
|
texImage->Height2 = 1 << texImage->HeightLog2;
|
|
texImage->MaxLog2 = MAX2( texImage->WidthLog2, texImage->HeightLog2 );
|
|
|
|
/* XXX should we really allocate memory for the image or let it be NULL? */
|
|
/*texImage->Data = NULL;*/
|
|
|
|
texImage->Data = (GLubyte *) malloc( numPixels * components );
|
|
|
|
/*
|
|
* Let's see if anyone finds this. If glTexImage2D() is called with
|
|
* a NULL image pointer then load the texture image with something
|
|
* interesting instead of leaving it indeterminate.
|
|
*/
|
|
if (texImage->Data) {
|
|
char message[8][32] = {
|
|
" X X XXXXX XXX X ",
|
|
" XX XX X X X X X ",
|
|
" X X X X X X X ",
|
|
" X X XXXX XXX XXXXX ",
|
|
" X X X X X X ",
|
|
" X X X X X X X ",
|
|
" X X XXXXX XXX X X ",
|
|
" "
|
|
};
|
|
|
|
GLubyte *imgPtr = texImage->Data;
|
|
GLint i, j, k;
|
|
for (i=0;i<height;i++) {
|
|
GLint srcRow = 7 - i % 8;
|
|
for (j=0;j<width;j++) {
|
|
GLint srcCol = j % 32;
|
|
GLubyte texel = (message[srcRow][srcCol]=='X') ? 255 : 70;
|
|
for (k=0;k<components;k++) {
|
|
*imgPtr++ = texel;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return texImage;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
* Test glTexImagee1D() parameters for errors.
|
|
* Return: GL_TRUE = an error was detected, GL_FALSE = no errors
|
|
*/
|
|
static GLboolean texture_1d_error_check( GLcontext *ctx, GLenum target,
|
|
GLint level, GLenum internalFormat,
|
|
GLenum format, GLenum type,
|
|
GLint width, GLint border )
|
|
{
|
|
GLint iformat;
|
|
if (target!=GL_TEXTURE_1D && target!=GL_PROXY_TEXTURE_1D) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D" );
|
|
return GL_TRUE;
|
|
}
|
|
if (level<0 || level>=MAX_TEXTURE_LEVELS) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexImage1D(level)" );
|
|
return GL_TRUE;
|
|
}
|
|
iformat = decode_internal_format( internalFormat );
|
|
if (iformat<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexImage1D(internalFormat)" );
|
|
return GL_TRUE;
|
|
}
|
|
if (border!=0 && border!=1) {
|
|
if (target!=GL_PROXY_TEXTURE_1D) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexImage1D(border)" );
|
|
}
|
|
return GL_TRUE;
|
|
}
|
|
if (width<2*border || width>2+MAX_TEXTURE_SIZE) {
|
|
if (target!=GL_PROXY_TEXTURE_1D) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexImage1D(width)" );
|
|
}
|
|
return GL_TRUE;
|
|
}
|
|
if (logbase2( width-2*border )<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE,
|
|
"glTexImage1D(width != 2^k + 2*border)");
|
|
return GL_TRUE;
|
|
}
|
|
switch (format) {
|
|
case GL_COLOR_INDEX:
|
|
case GL_RED:
|
|
case GL_GREEN:
|
|
case GL_BLUE:
|
|
case GL_ALPHA:
|
|
case GL_RGB:
|
|
case GL_BGR_EXT:
|
|
case GL_RGBA:
|
|
case GL_BGRA_EXT:
|
|
case GL_LUMINANCE:
|
|
case GL_LUMINANCE_ALPHA:
|
|
/* OK */
|
|
break;
|
|
default:
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D(format)" );
|
|
return GL_TRUE;
|
|
}
|
|
switch (type) {
|
|
case GL_UNSIGNED_BYTE:
|
|
case GL_BYTE:
|
|
case GL_UNSIGNED_SHORT:
|
|
case GL_SHORT:
|
|
case GL_FLOAT:
|
|
/* OK */
|
|
break;
|
|
default:
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D(type)" );
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
|
|
/*
|
|
* Test glTexImagee2D() parameters for errors.
|
|
* Return: GL_TRUE = an error was detected, GL_FALSE = no errors
|
|
*/
|
|
static GLboolean texture_2d_error_check( GLcontext *ctx, GLenum target,
|
|
GLint level, GLenum internalFormat,
|
|
GLenum format, GLenum type,
|
|
GLint width, GLint height,
|
|
GLint border )
|
|
{
|
|
GLint iformat;
|
|
if (target!=GL_TEXTURE_2D && target!=GL_PROXY_TEXTURE_2D) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(target)" );
|
|
return GL_TRUE;
|
|
}
|
|
if (level<0 || level>=MAX_TEXTURE_LEVELS) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexImage2D(level)" );
|
|
return GL_TRUE;
|
|
}
|
|
iformat = decode_internal_format( internalFormat );
|
|
if (iformat<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexImage2D(internalFormat)" );
|
|
return GL_TRUE;
|
|
}
|
|
if (border!=0 && border!=1) {
|
|
if (target!=GL_PROXY_TEXTURE_2D) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexImage2D(border)" );
|
|
}
|
|
return GL_TRUE;
|
|
}
|
|
if (width<2*border || width>2+MAX_TEXTURE_SIZE) {
|
|
if (target!=GL_PROXY_TEXTURE_2D) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexImage2D(width)" );
|
|
}
|
|
return GL_TRUE;
|
|
}
|
|
if (height<2*border || height>2+MAX_TEXTURE_SIZE) {
|
|
if (target!=GL_PROXY_TEXTURE_2D) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexImage2D(height)" );
|
|
}
|
|
return GL_TRUE;
|
|
}
|
|
if (logbase2( width-2*border )<0) {
|
|
gl_error( ctx,GL_INVALID_VALUE,
|
|
"glTexImage2D(width != 2^k + 2*border)");
|
|
return GL_TRUE;
|
|
}
|
|
if (logbase2( height-2*border )<0) {
|
|
gl_error( ctx,GL_INVALID_VALUE,
|
|
"glTexImage2D(height != 2^k + 2*border)");
|
|
return GL_TRUE;
|
|
}
|
|
switch (format) {
|
|
case GL_COLOR_INDEX:
|
|
case GL_RED:
|
|
case GL_GREEN:
|
|
case GL_BLUE:
|
|
case GL_ALPHA:
|
|
case GL_RGB:
|
|
case GL_BGR_EXT:
|
|
case GL_RGBA:
|
|
case GL_BGRA_EXT:
|
|
case GL_LUMINANCE:
|
|
case GL_LUMINANCE_ALPHA:
|
|
/* OK */
|
|
break;
|
|
default:
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(format)" );
|
|
return GL_TRUE;
|
|
}
|
|
switch (type) {
|
|
case GL_UNSIGNED_BYTE:
|
|
case GL_BYTE:
|
|
case GL_UNSIGNED_SHORT:
|
|
case GL_SHORT:
|
|
case GL_UNSIGNED_INT:
|
|
case GL_INT:
|
|
case GL_FLOAT:
|
|
/* OK */
|
|
break;
|
|
default:
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(type)" );
|
|
return GL_TRUE;
|
|
}
|
|
return GL_FALSE;
|
|
}
|
|
|
|
|
|
/*
|
|
* Called from the API. Note that width includes the border.
|
|
*/
|
|
void gl_TexImage1D( GLcontext *ctx,
|
|
GLenum target, GLint level, GLint internalformat,
|
|
GLsizei width, GLint border, GLenum format,
|
|
GLenum type, struct gl_image *image )
|
|
{
|
|
if (INSIDE_BEGIN_END(ctx)) {
|
|
gl_error( ctx, GL_INVALID_OPERATION, "glTexImage1D" );
|
|
return;
|
|
}
|
|
|
|
if (target==GL_TEXTURE_1D) {
|
|
struct gl_texture_image *teximage;
|
|
if (texture_1d_error_check( ctx, target, level, internalformat,
|
|
format, type, width, border )) {
|
|
/* error in texture image was detected */
|
|
return;
|
|
}
|
|
|
|
/* free current texture image, if any */
|
|
if (ctx->Texture.Current1D->Image[level]) {
|
|
gl_free_texture_image( ctx->Texture.Current1D->Image[level] );
|
|
}
|
|
|
|
/* make new texture from source image */
|
|
if (image) {
|
|
teximage = image_to_texture(ctx, image, internalformat, border);
|
|
}
|
|
else {
|
|
teximage = make_null_texture(ctx, internalformat,
|
|
width, 1, 1, border);
|
|
}
|
|
|
|
/* install new texture image */
|
|
ctx->Texture.Current1D->Image[level] = teximage;
|
|
ctx->Texture.Current1D->Dirty = GL_TRUE;
|
|
ctx->Texture.AnyDirty = GL_TRUE;
|
|
ctx->NewState |= NEW_TEXTURING;
|
|
|
|
/* free the source image */
|
|
if (image && image->RefCount==0) {
|
|
/* if RefCount>0 then image must be in a display list */
|
|
gl_free_image(image);
|
|
}
|
|
|
|
/* tell driver about change */
|
|
if (ctx->Driver.TexImage) {
|
|
(*ctx->Driver.TexImage)( ctx, GL_TEXTURE_1D,
|
|
ctx->Texture.Current1D,
|
|
level, internalformat, teximage );
|
|
}
|
|
}
|
|
else if (target==GL_PROXY_TEXTURE_1D) {
|
|
/* Proxy texture: check for errors and update proxy state */
|
|
if (texture_1d_error_check( ctx, target, level, internalformat,
|
|
format, type, width, border )) {
|
|
if (level>=0 && level<MAX_TEXTURE_LEVELS) {
|
|
MEMSET( ctx->Texture.Proxy1D->Image[level], 0,
|
|
sizeof(struct gl_texture_image) );
|
|
}
|
|
}
|
|
else {
|
|
ctx->Texture.Proxy1D->Image[level]->Format = internalformat;
|
|
ctx->Texture.Proxy1D->Image[level]->Border = border;
|
|
ctx->Texture.Proxy1D->Image[level]->Width = width;
|
|
ctx->Texture.Proxy1D->Image[level]->Height = 1;
|
|
}
|
|
if (image && image->RefCount==0) {
|
|
/* if RefCount>0 then image must be in a display list */
|
|
gl_free_image(image);
|
|
}
|
|
}
|
|
else {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexImage1D(target)" );
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
* Called by the API or display list executor.
|
|
* Note that width and height include the border.
|
|
*/
|
|
void gl_TexImage2D( GLcontext *ctx,
|
|
GLenum target, GLint level, GLint internalformat,
|
|
GLsizei width, GLsizei height, GLint border,
|
|
GLenum format, GLenum type,
|
|
struct gl_image *image )
|
|
{
|
|
if (INSIDE_BEGIN_END(ctx)) {
|
|
gl_error( ctx, GL_INVALID_OPERATION, "glTexImage2D" );
|
|
return;
|
|
}
|
|
|
|
if (target==GL_TEXTURE_2D) {
|
|
struct gl_texture_image *teximage;
|
|
if (texture_2d_error_check( ctx, target, level, internalformat,
|
|
format, type, width, height, border )) {
|
|
/* error in texture image was detected */
|
|
return;
|
|
}
|
|
|
|
/* free current texture image, if any */
|
|
if (ctx->Texture.Current2D->Image[level]) {
|
|
gl_free_texture_image( ctx->Texture.Current2D->Image[level] );
|
|
}
|
|
|
|
/* make new texture from source image */
|
|
if (image) {
|
|
teximage = image_to_texture(ctx, image, internalformat, border);
|
|
}
|
|
else {
|
|
teximage = make_null_texture(ctx, internalformat,
|
|
width, height, 1, border);
|
|
}
|
|
|
|
/* install new texture image */
|
|
ctx->Texture.Current2D->Image[level] = teximage;
|
|
ctx->Texture.Current2D->Dirty = GL_TRUE;
|
|
ctx->Texture.AnyDirty = GL_TRUE;
|
|
ctx->NewState |= NEW_TEXTURING;
|
|
|
|
/* free the source image */
|
|
if (image && image->RefCount==0) {
|
|
/* if RefCount>0 then image must be in a display list */
|
|
gl_free_image(image);
|
|
}
|
|
|
|
/* tell driver about change */
|
|
if (ctx->Driver.TexImage) {
|
|
(*ctx->Driver.TexImage)( ctx, GL_TEXTURE_2D,
|
|
ctx->Texture.Current2D,
|
|
level, internalformat, teximage );
|
|
}
|
|
}
|
|
else if (target==GL_PROXY_TEXTURE_2D) {
|
|
/* Proxy texture: check for errors and update proxy state */
|
|
if (texture_2d_error_check( ctx, target, level, internalformat,
|
|
format, type, width, height, border )) {
|
|
if (level>=0 && level<MAX_TEXTURE_LEVELS) {
|
|
MEMSET( ctx->Texture.Proxy2D->Image[level], 0,
|
|
sizeof(struct gl_texture_image) );
|
|
}
|
|
}
|
|
else {
|
|
ctx->Texture.Proxy2D->Image[level]->Format = internalformat;
|
|
ctx->Texture.Proxy2D->Image[level]->Border = border;
|
|
ctx->Texture.Proxy2D->Image[level]->Width = width;
|
|
ctx->Texture.Proxy2D->Image[level]->Height = height;
|
|
}
|
|
if (image && image->RefCount==0) {
|
|
/* if RefCount>0 then image must be in a display list */
|
|
gl_free_image(image);
|
|
}
|
|
}
|
|
else {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexImage2D(target)" );
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void gl_GetTexImage( GLcontext *ctx, GLenum target, GLint level, GLenum format,
|
|
GLenum type, GLvoid *pixels )
|
|
{
|
|
gl_problem(ctx, "glGetTexImage not implemented");
|
|
/* TODO */
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
* Unpack the image data given to glTexSubImage[123]D.
|
|
* This function is just a wrapper for gl_unpack_image() but it does
|
|
* some extra error checking.
|
|
*/
|
|
struct gl_image *
|
|
gl_unpack_texsubimage( GLcontext *ctx, GLint width, GLint height,
|
|
GLenum format, GLenum type, const GLvoid *pixels )
|
|
{
|
|
if (type==GL_BITMAP && format!=GL_COLOR_INDEX) {
|
|
return NULL;
|
|
}
|
|
|
|
if (format==GL_STENCIL_INDEX || format==GL_DEPTH_COMPONENT){
|
|
return NULL;
|
|
}
|
|
|
|
if (gl_sizeof_type(type)<=0) {
|
|
return NULL;
|
|
}
|
|
|
|
return gl_unpack_image( ctx, width, height, format, type, pixels );
|
|
}
|
|
|
|
|
|
|
|
void gl_TexSubImage1D( GLcontext *ctx,
|
|
GLenum target, GLint level, GLint xoffset,
|
|
GLsizei width, GLenum format, GLenum type,
|
|
struct gl_image *image )
|
|
{
|
|
struct gl_texture_image *destTex;
|
|
|
|
if (target!=GL_TEXTURE_1D) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(target)" );
|
|
return;
|
|
}
|
|
if (level<0 || level>=MAX_TEXTURE_LEVELS) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(level)" );
|
|
return;
|
|
}
|
|
|
|
destTex = ctx->Texture.Current1D->Image[level];
|
|
if (!destTex) {
|
|
gl_error( ctx, GL_INVALID_OPERATION, "glTexSubImage1D" );
|
|
return;
|
|
}
|
|
|
|
if (xoffset < -((GLint)destTex->Border)) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage1D(xoffset)" );
|
|
return;
|
|
}
|
|
if (xoffset + width > destTex->Width + destTex->Border) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage1D(xoffset+width)" );
|
|
return;
|
|
}
|
|
|
|
if (image) {
|
|
/* unpacking must have been error-free */
|
|
GLint texcomponents = components_in_intformat(destTex->Format);
|
|
|
|
if (image->Type==GL_UNSIGNED_BYTE && texcomponents==image->Components) {
|
|
/* Simple case, just byte copy image data into texture image */
|
|
/* row by row. */
|
|
GLubyte *dst = destTex->Data + texcomponents * xoffset;
|
|
GLubyte *src = (GLubyte *) image->Data;
|
|
MEMCPY( dst, src, width * texcomponents );
|
|
}
|
|
else {
|
|
/* General case, convert image pixels into texels, scale, bias, etc */
|
|
struct gl_texture_image *subTexImg = image_to_texture(ctx, image,
|
|
destTex->IntFormat, destTex->Border);
|
|
GLubyte *dst = destTex->Data + texcomponents * xoffset;
|
|
GLubyte *src = subTexImg->Data;
|
|
MEMCPY( dst, src, width * texcomponents );
|
|
gl_free_texture_image(subTexImg);
|
|
}
|
|
|
|
/* if the image's reference count is zero, delete it now */
|
|
if (image->RefCount==0) {
|
|
gl_free_image(image);
|
|
}
|
|
|
|
ctx->Texture.Current1D->Dirty = GL_TRUE;
|
|
ctx->Texture.AnyDirty = GL_TRUE;
|
|
|
|
/* tell driver about change */
|
|
if (ctx->Driver.TexSubImage) {
|
|
(*ctx->Driver.TexSubImage)( ctx, GL_TEXTURE_1D,
|
|
ctx->Texture.Current1D, level,
|
|
xoffset,0,width,1,
|
|
ctx->Texture.Current1D->Image[level]->IntFormat,
|
|
destTex );
|
|
}
|
|
else {
|
|
if (ctx->Driver.TexImage) {
|
|
(*ctx->Driver.TexImage)( ctx, GL_TEXTURE_1D,
|
|
ctx->Texture.Current1D,
|
|
level, ctx->Texture.Current1D->Image[level]->IntFormat,
|
|
destTex );
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
/* if no image, an error must have occured, do more testing now */
|
|
GLint components, size;
|
|
|
|
if (width<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage1D(width)" );
|
|
return;
|
|
}
|
|
if (type==GL_BITMAP && format!=GL_COLOR_INDEX) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(format)" );
|
|
return;
|
|
}
|
|
components = components_in_intformat( format );
|
|
if (components<0 || format==GL_STENCIL_INDEX
|
|
|| format==GL_DEPTH_COMPONENT){
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(format)" );
|
|
return;
|
|
}
|
|
size = gl_sizeof_type( type );
|
|
if (size<=0) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(type)" );
|
|
return;
|
|
}
|
|
/* if we get here, probably ran out of memory during unpacking */
|
|
gl_error( ctx, GL_OUT_OF_MEMORY, "glTexSubImage1D" );
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void gl_TexSubImage2D( GLcontext *ctx,
|
|
GLenum target, GLint level,
|
|
GLint xoffset, GLint yoffset,
|
|
GLsizei width, GLsizei height,
|
|
GLenum format, GLenum type,
|
|
struct gl_image *image )
|
|
{
|
|
struct gl_texture_image *destTex;
|
|
|
|
if (target!=GL_TEXTURE_2D) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(target)" );
|
|
return;
|
|
}
|
|
if (level<0 || level>=MAX_TEXTURE_LEVELS) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(level)" );
|
|
return;
|
|
}
|
|
|
|
destTex = ctx->Texture.Current2D->Image[level];
|
|
if (!destTex) {
|
|
gl_error( ctx, GL_INVALID_OPERATION, "glTexSubImage2D" );
|
|
return;
|
|
}
|
|
|
|
if (xoffset < -((GLint)destTex->Border)) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(xoffset)" );
|
|
return;
|
|
}
|
|
if (yoffset < -((GLint)destTex->Border)) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(yoffset)" );
|
|
return;
|
|
}
|
|
if (xoffset + width > destTex->Width + destTex->Border) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(xoffset+width)" );
|
|
return;
|
|
}
|
|
if (yoffset + height > destTex->Height + destTex->Border) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(yoffset+height)" );
|
|
return;
|
|
}
|
|
|
|
if (image) {
|
|
/* unpacking must have been error-free */
|
|
GLint texcomponents = components_in_intformat(destTex->Format);
|
|
|
|
if (image->Type==GL_UNSIGNED_BYTE && texcomponents==image->Components) {
|
|
/* Simple case, just byte copy image data into texture image */
|
|
/* row by row. */
|
|
GLubyte *dst = destTex->Data
|
|
+ (yoffset * destTex->Width + xoffset) * texcomponents;
|
|
GLubyte *src = (GLubyte *) image->Data;
|
|
GLint j;
|
|
for (j=0;j<height;j++) {
|
|
MEMCPY( dst, src, width * texcomponents );
|
|
dst += destTex->Width * texcomponents * sizeof(GLubyte);
|
|
src += width * texcomponents * sizeof(GLubyte);
|
|
}
|
|
}
|
|
else {
|
|
/* General case, convert image pixels into texels, scale, bias, etc */
|
|
struct gl_texture_image *subTexImg = image_to_texture(ctx, image,
|
|
destTex->IntFormat, destTex->Border);
|
|
GLubyte *dst = destTex->Data
|
|
+ (yoffset * destTex->Width + xoffset) * texcomponents;
|
|
GLubyte *src = subTexImg->Data;
|
|
GLint j;
|
|
for (j=0;j<height;j++) {
|
|
MEMCPY( dst, src, width * texcomponents );
|
|
dst += destTex->Width * texcomponents * sizeof(GLubyte);
|
|
src += width * texcomponents * sizeof(GLubyte);
|
|
}
|
|
gl_free_texture_image(subTexImg);
|
|
}
|
|
|
|
/* if the image's reference count is zero, delete it now */
|
|
if (image->RefCount==0) {
|
|
gl_free_image(image);
|
|
}
|
|
|
|
ctx->Texture.Current2D->Dirty = GL_TRUE;
|
|
ctx->Texture.AnyDirty = GL_TRUE;
|
|
|
|
/* tell driver about change */
|
|
if (ctx->Driver.TexSubImage) {
|
|
(*ctx->Driver.TexSubImage)( ctx, GL_TEXTURE_2D, ctx->Texture.Current2D, level,
|
|
xoffset, yoffset, width, height,
|
|
ctx->Texture.Current2D->Image[level]->IntFormat,
|
|
destTex );
|
|
}
|
|
else {
|
|
if (ctx->Driver.TexImage) {
|
|
(*ctx->Driver.TexImage)( ctx, GL_TEXTURE_2D, ctx->Texture.Current2D,
|
|
level, ctx->Texture.Current2D->Image[level]->IntFormat,
|
|
destTex );
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
/* if no image, an error must have occured, do more testing now */
|
|
GLint components, size;
|
|
|
|
if (width<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(width)" );
|
|
return;
|
|
}
|
|
if (height<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glTexSubImage2D(height)" );
|
|
return;
|
|
}
|
|
if (type==GL_BITMAP && format!=GL_COLOR_INDEX) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage1D(format)" );
|
|
return;
|
|
}
|
|
components = gl_components_in_format( format );
|
|
if (components<0 || format==GL_STENCIL_INDEX
|
|
|| format==GL_DEPTH_COMPONENT){
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(format)" );
|
|
return;
|
|
}
|
|
size = gl_sizeof_type( type );
|
|
if (size<=0) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glTexSubImage2D(type)" );
|
|
return;
|
|
}
|
|
/* if we get here, probably ran out of memory during unpacking */
|
|
gl_error( ctx, GL_OUT_OF_MEMORY, "glTexSubImage2D" );
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Read an RGBA image from the frame buffer.
|
|
* Input: ctx - the context
|
|
* x, y - lower left corner
|
|
* width, height - size of region to read
|
|
* format - one of GL_RED, GL_RGB, GL_LUMINANCE, etc.
|
|
* Return: gl_image pointer or NULL if out of memory
|
|
*/
|
|
static struct gl_image *read_color_image( GLcontext *ctx, GLint x, GLint y,
|
|
GLsizei width, GLsizei height,
|
|
GLint format )
|
|
{
|
|
struct gl_image *image;
|
|
GLubyte *imgptr;
|
|
GLint components;
|
|
GLint i, j;
|
|
|
|
components = components_in_intformat( format );
|
|
|
|
/*
|
|
* Allocate image struct and image data buffer
|
|
*/
|
|
image = (struct gl_image *) malloc( sizeof(struct gl_image) );
|
|
if (image) {
|
|
image->Width = width;
|
|
image->Height = height;
|
|
image->Components = components;
|
|
image->Format = format;
|
|
image->Type = GL_UNSIGNED_BYTE;
|
|
image->RefCount = 0;
|
|
image->Data = (GLubyte *) malloc( width * height * components );
|
|
if (!image->Data) {
|
|
free(image);
|
|
return NULL;
|
|
}
|
|
}
|
|
else {
|
|
return NULL;
|
|
}
|
|
|
|
imgptr = (GLubyte *) image->Data;
|
|
|
|
/* Select buffer to read from */
|
|
(void) (*ctx->Driver.SetBuffer)( ctx, ctx->Pixel.ReadBuffer );
|
|
|
|
for (j=0;j<height;j++) {
|
|
GLubyte red[MAX_WIDTH], green[MAX_WIDTH];
|
|
GLubyte blue[MAX_WIDTH], alpha[MAX_WIDTH];
|
|
gl_read_color_span( ctx, width, x, y+j, red, green, blue, alpha );
|
|
|
|
if (!ctx->Visual->EightBitColor) {
|
|
/* scale red, green, blue, alpha values to range [0,255] */
|
|
GLfloat rscale = 255.0f * ctx->Visual->InvRedScale;
|
|
GLfloat gscale = 255.0f * ctx->Visual->InvGreenScale;
|
|
GLfloat bscale = 255.0f * ctx->Visual->InvBlueScale;
|
|
GLfloat ascale = 255.0f * ctx->Visual->InvAlphaScale;
|
|
for (i=0;i<width;i++) {
|
|
red[i] = (GLubyte) (GLint) (red[i] * rscale);
|
|
green[i] = (GLubyte) (GLint) (green[i] * gscale);
|
|
blue[i] = (GLubyte) (GLint) (blue[i] * bscale);
|
|
alpha[i] = (GLubyte) (GLint) (alpha[i] * ascale);
|
|
}
|
|
}
|
|
|
|
switch (format) {
|
|
case GL_ALPHA:
|
|
for (i=0;i<width;i++) {
|
|
*imgptr++ = alpha[i];
|
|
}
|
|
break;
|
|
case GL_LUMINANCE:
|
|
for (i=0;i<width;i++) {
|
|
*imgptr++ = red[i];
|
|
}
|
|
break;
|
|
case GL_LUMINANCE_ALPHA:
|
|
for (i=0;i<width;i++) {
|
|
*imgptr++ = red[i];
|
|
*imgptr++ = alpha[i];
|
|
}
|
|
break;
|
|
case GL_INTENSITY:
|
|
for (i=0;i<width;i++) {
|
|
*imgptr++ = red[i];
|
|
}
|
|
break;
|
|
case GL_RGB:
|
|
for (i=0;i<width;i++) {
|
|
*imgptr++ = red[i];
|
|
*imgptr++ = green[i];
|
|
*imgptr++ = blue[i];
|
|
}
|
|
break;
|
|
case GL_RGBA:
|
|
for (i=0;i<width;i++) {
|
|
*imgptr++ = red[i];
|
|
*imgptr++ = green[i];
|
|
*imgptr++ = blue[i];
|
|
*imgptr++ = alpha[i];
|
|
}
|
|
break;
|
|
} /*switch*/
|
|
|
|
} /*for*/
|
|
|
|
/* Restore drawing buffer */
|
|
(void) (*ctx->Driver.SetBuffer)( ctx, ctx->Color.DrawBuffer );
|
|
|
|
return image;
|
|
}
|
|
|
|
|
|
|
|
|
|
void gl_CopyTexImage1D( GLcontext *ctx,
|
|
GLenum target, GLint level,
|
|
GLenum internalformat,
|
|
GLint x, GLint y,
|
|
GLsizei width, GLint border )
|
|
{
|
|
GLint format;
|
|
struct gl_image *teximage;
|
|
|
|
if (INSIDE_BEGIN_END(ctx)) {
|
|
gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexImage1D" );
|
|
return;
|
|
}
|
|
if (target!=GL_TEXTURE_1D) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage1D(target)" );
|
|
return;
|
|
}
|
|
if (level<0 || level>=MAX_TEXTURE_LEVELS) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(level)" );
|
|
return;
|
|
}
|
|
if (border!=0 && border!=1) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(border)" );
|
|
return;
|
|
}
|
|
if (width<2*border || width>2+MAX_TEXTURE_SIZE || width<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(width)" );
|
|
return;
|
|
}
|
|
format = decode_internal_format( internalformat );
|
|
if (format<0 || (internalformat>=1 && internalformat<=4)) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage1D(format)" );
|
|
return;
|
|
}
|
|
|
|
teximage = read_color_image( ctx, x, y, width, 1, format );
|
|
if (!teximage) {
|
|
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D" );
|
|
return;
|
|
}
|
|
|
|
gl_TexImage1D( ctx, target, level, internalformat, width,
|
|
border, GL_RGBA, GL_UNSIGNED_BYTE, teximage );
|
|
|
|
/* teximage was freed in gl_TexImage1D */
|
|
}
|
|
|
|
|
|
|
|
void gl_CopyTexImage2D( GLcontext *ctx,
|
|
GLenum target, GLint level, GLenum internalformat,
|
|
GLint x, GLint y, GLsizei width, GLsizei height,
|
|
GLint border )
|
|
{
|
|
GLint format;
|
|
struct gl_image *teximage;
|
|
|
|
if (INSIDE_BEGIN_END(ctx)) {
|
|
gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexImage2D" );
|
|
return;
|
|
}
|
|
if (target!=GL_TEXTURE_2D) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glCopyTexImage2D(target)" );
|
|
return;
|
|
}
|
|
if (level<0 || level>=MAX_TEXTURE_LEVELS) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(level)" );
|
|
return;
|
|
}
|
|
if (border!=0 && border!=1) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(border)" );
|
|
return;
|
|
}
|
|
if (width<2*border || width>2+MAX_TEXTURE_SIZE || width<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(width)" );
|
|
return;
|
|
}
|
|
if (height<2*border || height>2+MAX_TEXTURE_SIZE || height<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(height)" );
|
|
return;
|
|
}
|
|
format = decode_internal_format( internalformat );
|
|
if (format<0 || (internalformat>=1 && internalformat<=4)) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexImage2D(format)" );
|
|
return;
|
|
}
|
|
|
|
teximage = read_color_image( ctx, x, y, width, height, format );
|
|
if (!teximage) {
|
|
gl_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D" );
|
|
return;
|
|
}
|
|
|
|
gl_TexImage2D( ctx, target, level, internalformat, width, height,
|
|
border, GL_RGBA, GL_UNSIGNED_BYTE, teximage );
|
|
|
|
/* teximage was freed in gl_TexImage2D */
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
* Do the work of glCopyTexSubImage[12]D.
|
|
* TODO: apply pixel bias scale and mapping.
|
|
*/
|
|
static void copy_tex_sub_image( GLcontext *ctx, struct gl_texture_image *dest,
|
|
GLint width, GLint height,
|
|
GLint srcx, GLint srcy,
|
|
GLint dstx, GLint dsty)
|
|
{
|
|
GLint i, j;
|
|
GLint format, components;
|
|
|
|
format = dest->Format;
|
|
components = components_in_intformat( format );
|
|
|
|
for (j=0;j<height;j++) {
|
|
GLubyte red[MAX_WIDTH], green[MAX_WIDTH];
|
|
GLubyte blue[MAX_WIDTH], alpha[MAX_WIDTH];
|
|
GLubyte *texptr;
|
|
|
|
gl_read_color_span( ctx, width, srcx, srcy+j, red, green, blue, alpha );
|
|
|
|
if (!ctx->Visual->EightBitColor) {
|
|
/* scale red, green, blue, alpha values to range [0,255] */
|
|
GLfloat rscale = 255.0f * ctx->Visual->InvRedScale;
|
|
GLfloat gscale = 255.0f * ctx->Visual->InvGreenScale;
|
|
GLfloat bscale = 255.0f * ctx->Visual->InvBlueScale;
|
|
GLfloat ascale = 255.0f * ctx->Visual->InvAlphaScale;
|
|
for (i=0;i<width;i++) {
|
|
red[i] = (GLubyte) (GLint) (red[i] * rscale);
|
|
green[i] = (GLubyte) (GLint) (green[i] * gscale);
|
|
blue[i] = (GLubyte) (GLint) (blue[i] * bscale);
|
|
alpha[i] = (GLubyte) (GLint) (alpha[i] * ascale);
|
|
}
|
|
}
|
|
|
|
texptr = dest->Data + ( (dsty+j) * width + dstx) * components;
|
|
|
|
switch (format) {
|
|
case GL_ALPHA:
|
|
for (i=0;i<width;i++) {
|
|
*texptr++ = alpha[i];
|
|
}
|
|
break;
|
|
case GL_LUMINANCE:
|
|
for (i=0;i<width;i++) {
|
|
*texptr++ = red[i];
|
|
}
|
|
break;
|
|
case GL_LUMINANCE_ALPHA:
|
|
for (i=0;i<width;i++) {
|
|
*texptr++ = red[i];
|
|
*texptr++ = alpha[i];
|
|
}
|
|
break;
|
|
case GL_INTENSITY:
|
|
for (i=0;i<width;i++) {
|
|
*texptr++ = red[i];
|
|
}
|
|
break;
|
|
case GL_RGB:
|
|
for (i=0;i<width;i++) {
|
|
*texptr++ = red[i];
|
|
*texptr++ = green[i];
|
|
*texptr++ = blue[i];
|
|
}
|
|
break;
|
|
case GL_RGBA:
|
|
for (i=0;i<width;i++) {
|
|
*texptr++ = red[i];
|
|
*texptr++ = green[i];
|
|
*texptr++ = blue[i];
|
|
*texptr++ = alpha[i];
|
|
}
|
|
break;
|
|
} /*switch*/
|
|
} /*for*/
|
|
}
|
|
|
|
|
|
|
|
|
|
void gl_CopyTexSubImage1D( GLcontext *ctx,
|
|
GLenum target, GLint level,
|
|
GLint xoffset, GLint x, GLint y, GLsizei width )
|
|
{
|
|
struct gl_texture_image *teximage;
|
|
|
|
if (INSIDE_BEGIN_END(ctx)) {
|
|
gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage1D" );
|
|
return;
|
|
}
|
|
if (target!=GL_TEXTURE_1D) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage1D(target)" );
|
|
return;
|
|
}
|
|
if (level<0 || level>=MAX_TEXTURE_LEVELS) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage1D(level)" );
|
|
return;
|
|
}
|
|
if (width<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage1D(width)" );
|
|
return;
|
|
}
|
|
|
|
teximage = ctx->Texture.Current1D->Image[level];
|
|
|
|
if (teximage) {
|
|
if (xoffset < -((GLint)teximage->Border)) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage1D(xoffset)" );
|
|
return;
|
|
}
|
|
/* NOTE: we're adding the border here, not subtracting! */
|
|
if (xoffset+width > teximage->Width+teximage->Border) {
|
|
gl_error( ctx, GL_INVALID_VALUE,
|
|
"glCopyTexSubImage1D(xoffset+width)" );
|
|
return;
|
|
}
|
|
if (teximage->Data) {
|
|
copy_tex_sub_image( ctx, teximage, width, 1, x, y, xoffset, 0);
|
|
}
|
|
}
|
|
else {
|
|
gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage1D" );
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void gl_CopyTexSubImage2D( GLcontext *ctx,
|
|
GLenum target, GLint level,
|
|
GLint xoffset, GLint yoffset,
|
|
GLint x, GLint y, GLsizei width, GLsizei height )
|
|
{
|
|
struct gl_texture_image *teximage;
|
|
|
|
if (INSIDE_BEGIN_END(ctx)) {
|
|
gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage2D" );
|
|
return;
|
|
}
|
|
if (target!=GL_TEXTURE_2D) {
|
|
gl_error( ctx, GL_INVALID_ENUM, "glCopyTexSubImage2D(target)" );
|
|
return;
|
|
}
|
|
if (level<0 || level>=MAX_TEXTURE_LEVELS) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(level)" );
|
|
return;
|
|
}
|
|
if (width<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(width)" );
|
|
return;
|
|
}
|
|
if (height<0) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(height)" );
|
|
return;
|
|
}
|
|
|
|
teximage = ctx->Texture.Current2D->Image[level];
|
|
|
|
if (teximage) {
|
|
if (xoffset < -((GLint)teximage->Border)) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(xoffset)" );
|
|
return;
|
|
}
|
|
if (yoffset < -((GLint)teximage->Border)) {
|
|
gl_error( ctx, GL_INVALID_VALUE, "glCopyTexSubImage2D(yoffset)" );
|
|
return;
|
|
}
|
|
/* NOTE: we're adding the border here, not subtracting! */
|
|
if (xoffset+width > teximage->Width+teximage->Border) {
|
|
gl_error( ctx, GL_INVALID_VALUE,
|
|
"glCopyTexSubImage2D(xoffset+width)" );
|
|
return;
|
|
}
|
|
if (yoffset+height > teximage->Height+teximage->Border) {
|
|
gl_error( ctx, GL_INVALID_VALUE,
|
|
"glCopyTexSubImage2D(yoffset+height)" );
|
|
return;
|
|
}
|
|
|
|
if (teximage->Data) {
|
|
copy_tex_sub_image( ctx, teximage, width, height,
|
|
x, y, xoffset, yoffset);
|
|
}
|
|
}
|
|
else {
|
|
gl_error( ctx, GL_INVALID_OPERATION, "glCopyTexSubImage2D" );
|
|
}
|
|
}
|
|
|