mirror of
https://github.com/reactos/reactos.git
synced 2024-11-19 05:22:59 +00:00
5f2bebf7a5
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
495 lines
14 KiB
C
495 lines
14 KiB
C
/* $Id: misc.c,v 1.23 1997/12/06 18:07:13 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: misc.c,v $
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* Revision 1.23 1997/12/06 18:07:13 brianp
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* changed version to 2.6
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*
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* Revision 1.22 1997/12/05 04:38:55 brianp
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* added ClearColorAndDepth() function pointer (David Bucciarelli)
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*
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* Revision 1.21 1997/10/29 01:29:09 brianp
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* added GL_EXT_point_parameters extension from Daniel Barrero
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*
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* Revision 1.20 1997/10/16 02:32:19 brianp
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* added GL_EXT_shared_texture_palette extension
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*
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* Revision 1.19 1997/10/14 00:17:48 brianp
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* added 3DFX_set_global_palette to extension string for 3Dfx
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*
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* Revision 1.18 1997/09/27 00:13:44 brianp
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* added GL_EXT_paletted_texture extension
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*
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* Revision 1.17 1997/08/13 01:26:40 brianp
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* changed version string to 2.4
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*
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* Revision 1.16 1997/07/24 01:23:16 brianp
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* changed precompiled header symbol from PCH to PC_HEADER
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*
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* Revision 1.15 1997/06/20 02:21:36 brianp
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* don't clear buffers if RenderMode != GL_RENDER
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*
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* Revision 1.14 1997/05/28 03:25:43 brianp
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* added precompiled header (PCH) support
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*
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* Revision 1.13 1997/04/12 12:31:18 brianp
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* removed gl_Rectf()
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*
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* Revision 1.12 1997/03/21 01:58:54 brianp
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* now call Driver.RendererString() in gl_GetString()
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*
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* Revision 1.11 1997/02/10 20:40:51 brianp
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* added GL_MESA_resize_buffers to extensions string
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*
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* Revision 1.10 1997/02/09 18:44:35 brianp
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* added GL_EXT_texture3D support
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*
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* Revision 1.9 1997/01/08 20:55:02 brianp
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* added GL_EXT_texture_object
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*
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* Revision 1.8 1996/11/05 01:41:45 brianp
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* fixed potential scissor/clear color buffer bug
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*
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* Revision 1.7 1996/10/30 03:14:02 brianp
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* incremented version to 2.1
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*
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* Revision 1.6 1996/10/11 03:42:17 brianp
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* added GL_EXT_polygon_offset to extensions string
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*
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* Revision 1.5 1996/10/02 02:51:44 brianp
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* created clear_color_buffers() which handles draw mode GL_FRONT_AND_BACK
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*
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* Revision 1.4 1996/09/25 03:22:14 brianp
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* glDrawBuffer(GL_NONE) works now
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*
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* Revision 1.3 1996/09/24 00:16:10 brianp
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* set NewState flag in glRead/DrawBuffer() and glHint()
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* fixed display list bug in gl_Hint()
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*
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* Revision 1.2 1996/09/15 14:18:37 brianp
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* now use GLframebuffer and GLvisual
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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 <stdlib.h>
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#include <string.h>
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#include "accum.h"
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#include "alphabuf.h"
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#include "context.h"
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#include "depth.h"
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#include "macros.h"
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#include "masking.h"
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#include "misc.h"
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#include "stencil.h"
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#include "types.h"
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#endif
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void gl_ClearIndex( GLcontext *ctx, GLfloat c )
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{
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if (INSIDE_BEGIN_END(ctx)) {
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gl_error( ctx, GL_INVALID_OPERATION, "glClearIndex" );
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return;
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}
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ctx->Color.ClearIndex = (GLuint) c;
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if (!ctx->Visual->RGBAflag) {
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/* it's OK to call glClearIndex in RGBA mode but it should be a NOP */
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(*ctx->Driver.ClearIndex)( ctx, ctx->Color.ClearIndex );
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}
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}
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void gl_ClearColor( GLcontext *ctx, GLclampf red, GLclampf green,
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GLclampf blue, GLclampf alpha )
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{
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if (INSIDE_BEGIN_END(ctx)) {
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gl_error( ctx, GL_INVALID_OPERATION, "glClearColor" );
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return;
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}
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ctx->Color.ClearColor[0] = CLAMP( red, 0.0F, 1.0F );
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ctx->Color.ClearColor[1] = CLAMP( green, 0.0F, 1.0F );
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ctx->Color.ClearColor[2] = CLAMP( blue, 0.0F, 1.0F );
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ctx->Color.ClearColor[3] = CLAMP( alpha, 0.0F, 1.0F );
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if (ctx->Visual->RGBAflag) {
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GLubyte r = (GLint) (ctx->Color.ClearColor[0] * ctx->Visual->RedScale);
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GLubyte g = (GLint) (ctx->Color.ClearColor[1] * ctx->Visual->GreenScale);
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GLubyte b = (GLint) (ctx->Color.ClearColor[2] * ctx->Visual->BlueScale);
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GLubyte a = (GLint) (ctx->Color.ClearColor[3] * ctx->Visual->AlphaScale);
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(*ctx->Driver.ClearColor)( ctx, r, g, b, a );
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}
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}
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/*
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* Clear the color buffer when glColorMask or glIndexMask is in effect.
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*/
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static void clear_color_buffer_with_masking( GLcontext *ctx )
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{
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GLint x, y, height, width;
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/* Compute region to clear */
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if (ctx->Scissor.Enabled) {
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x = ctx->Buffer->Xmin;
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y = ctx->Buffer->Ymin;
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height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
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width = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
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}
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else {
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x = 0;
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y = 0;
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height = ctx->Buffer->Height;
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width = ctx->Buffer->Width;
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}
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if (ctx->Visual->RGBAflag) {
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/* RGBA mode */
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GLubyte red[MAX_WIDTH], green[MAX_WIDTH];
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GLubyte blue[MAX_WIDTH], alpha[MAX_WIDTH];
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GLubyte r = ctx->Color.ClearColor[0] * ctx->Visual->RedScale;
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GLubyte g = ctx->Color.ClearColor[1] * ctx->Visual->GreenScale;
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GLubyte b = ctx->Color.ClearColor[2] * ctx->Visual->BlueScale;
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GLubyte a = ctx->Color.ClearColor[3] * ctx->Visual->AlphaScale;
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GLint i;
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for (i=0;i<height;i++,y++) {
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MEMSET( red, (int) r, width );
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MEMSET( green, (int) g, width );
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MEMSET( blue, (int) b, width );
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MEMSET( alpha, (int) a, width );
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gl_mask_color_span( ctx, width, x, y, red, green, blue, alpha );
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(*ctx->Driver.WriteColorSpan)( ctx,
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width, x, y, red, green, blue, alpha, NULL );
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if (ctx->RasterMask & ALPHABUF_BIT) {
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gl_write_alpha_span( ctx, width, x, y, alpha, NULL );
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}
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}
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}
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else {
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/* Color index mode */
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GLuint indx[MAX_WIDTH];
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GLubyte mask[MAX_WIDTH];
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GLint i, j;
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MEMSET( mask, 1, width );
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for (i=0;i<height;i++,y++) {
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for (j=0;j<width;j++) {
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indx[j] = ctx->Color.ClearIndex;
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}
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gl_mask_index_span( ctx, width, x, y, indx );
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(*ctx->Driver.WriteIndexSpan)( ctx, width, x, y, indx, mask );
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}
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}
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}
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/*
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* Clear the front and/or back color buffers. Also clear the alpha
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* buffer(s) if present.
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*/
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static void clear_color_buffers( GLcontext *ctx )
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{
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if (ctx->Color.SWmasking) {
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clear_color_buffer_with_masking( ctx );
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}
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else {
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GLint x = ctx->Buffer->Xmin;
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GLint y = ctx->Buffer->Ymin;
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GLint height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
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GLint width = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
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(*ctx->Driver.Clear)( ctx, !ctx->Scissor.Enabled,
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x, y, width, height );
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if (ctx->RasterMask & ALPHABUF_BIT) {
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/* front and/or back alpha buffers will be cleared here */
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gl_clear_alpha_buffers( ctx );
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}
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}
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if (ctx->RasterMask & FRONT_AND_BACK_BIT) {
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/*** Also clear the back buffer ***/
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(*ctx->Driver.SetBuffer)( ctx, GL_BACK );
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if (ctx->Color.SWmasking) {
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clear_color_buffer_with_masking( ctx );
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}
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else {
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GLint x = ctx->Buffer->Xmin;
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GLint y = ctx->Buffer->Ymin;
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GLint height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
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GLint width = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
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(*ctx->Driver.Clear)( ctx, !ctx->Scissor.Enabled,
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x, y, width, height );
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}
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(*ctx->Driver.SetBuffer)( ctx, GL_FRONT );
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}
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}
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void gl_Clear( GLcontext *ctx, GLbitfield mask )
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{
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#ifdef PROFILE
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GLdouble t0 = gl_time();
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#endif
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if (INSIDE_BEGIN_END(ctx)) {
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gl_error( ctx, GL_INVALID_OPERATION, "glClear" );
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return;
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}
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if (ctx->RenderMode==GL_RENDER) {
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if (ctx->NewState) {
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gl_update_state( ctx );
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}
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/* See if we can call device driver function to clear both the
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* color and depth buffers.
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*/
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if (ctx->Driver.ClearColorAndDepth &&
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(mask & GL_COLOR_BUFFER_BIT) && (mask & GL_DEPTH_BUFFER_BIT)) {
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GLint x = ctx->Buffer->Xmin;
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GLint y = ctx->Buffer->Ymin;
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GLint height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
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GLint width = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
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(*ctx->Driver.ClearColorAndDepth)( ctx, !ctx->Scissor.Enabled,
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x, y, width, height );
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if (ctx->RasterMask & FRONT_AND_BACK_BIT) {
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/*** Also clear the back buffer ***/
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(*ctx->Driver.SetBuffer)( ctx, GL_BACK );
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(*ctx->Driver.ClearColorAndDepth)( ctx, !ctx->Scissor.Enabled,
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x, y, width, height );
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(*ctx->Driver.SetBuffer)( ctx, GL_FRONT );
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}
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}
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else {
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/* normal procedure for clearing buffers */
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if (mask & GL_COLOR_BUFFER_BIT) clear_color_buffers( ctx );
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if (mask & GL_DEPTH_BUFFER_BIT) (*ctx->Driver.ClearDepthBuffer)(ctx);
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if (mask & GL_ACCUM_BUFFER_BIT) gl_clear_accum_buffer( ctx );
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if (mask & GL_STENCIL_BUFFER_BIT) gl_clear_stencil_buffer( ctx );
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}
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#ifdef PROFILE
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ctx->ClearTime += gl_time() - t0;
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ctx->ClearCount++;
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#endif
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}
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}
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const GLubyte *gl_GetString( GLcontext *ctx, GLenum name )
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{
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static char renderer[1000];
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static char *vendor = "Brian Paul & ReactOS Developers";
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static char *version = "1.1";
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static char *extensions = "GL_EXT_paletted_texture GL_EXT_bgra GL_WIN_swap_hint";
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if (INSIDE_BEGIN_END(ctx)) {
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gl_error( ctx, GL_INVALID_OPERATION, "glGetString" );
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return (GLubyte *) 0;
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}
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switch (name) {
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case GL_VENDOR:
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return (GLubyte *) vendor;
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case GL_RENDERER:
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strcpy(renderer, "Mesa");
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if (ctx->Driver.RendererString) {
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strcat(renderer, " ");
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strcat(renderer, (*ctx->Driver.RendererString)());
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}
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return (GLubyte *) renderer;
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case GL_VERSION:
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return (GLubyte *) version;
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case GL_EXTENSIONS:
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return (GLubyte *) extensions;
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default:
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gl_error( ctx, GL_INVALID_ENUM, "glGetString" );
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return (GLubyte *) 0;
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}
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}
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void gl_Finish( GLcontext *ctx )
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{
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/* Don't compile into display list */
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if (INSIDE_BEGIN_END(ctx)) {
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gl_error( ctx, GL_INVALID_OPERATION, "glFinish" );
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return;
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}
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if (ctx->Driver.Finish) {
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(*ctx->Driver.Finish)( ctx );
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}
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}
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void gl_Flush( GLcontext *ctx )
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{
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/* Don't compile into display list */
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if (INSIDE_BEGIN_END(ctx)) {
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gl_error( ctx, GL_INVALID_OPERATION, "glFlush" );
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return;
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}
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if (ctx->Driver.Flush) {
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(*ctx->Driver.Flush)( ctx );
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}
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}
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void gl_Hint( GLcontext *ctx, GLenum target, GLenum mode )
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{
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if (INSIDE_BEGIN_END(ctx)) {
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gl_error( ctx, GL_INVALID_OPERATION, "glHint" );
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return;
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}
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if (mode!=GL_DONT_CARE && mode!=GL_FASTEST && mode!=GL_NICEST) {
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gl_error( ctx, GL_INVALID_ENUM, "glHint(mode)" );
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return;
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}
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switch (target) {
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case GL_FOG_HINT:
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ctx->Hint.Fog = mode;
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break;
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case GL_LINE_SMOOTH_HINT:
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ctx->Hint.LineSmooth = mode;
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break;
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case GL_PERSPECTIVE_CORRECTION_HINT:
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ctx->Hint.PerspectiveCorrection = mode;
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break;
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case GL_POINT_SMOOTH_HINT:
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ctx->Hint.PointSmooth = mode;
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break;
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case GL_POLYGON_SMOOTH_HINT:
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ctx->Hint.PolygonSmooth = mode;
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break;
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default:
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gl_error( ctx, GL_INVALID_ENUM, "glHint(target)" );
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}
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ctx->NewState |= NEW_ALL; /* just to be safe */
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}
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void gl_DrawBuffer( GLcontext *ctx, GLenum mode )
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{
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if (INSIDE_BEGIN_END(ctx)) {
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gl_error( ctx, GL_INVALID_OPERATION, "glDrawBuffer" );
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return;
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}
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switch (mode) {
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case GL_FRONT:
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case GL_FRONT_LEFT:
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case GL_FRONT_AND_BACK:
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if ( (*ctx->Driver.SetBuffer)( ctx, GL_FRONT ) == GL_FALSE ) {
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gl_error( ctx, GL_INVALID_ENUM, "glDrawBuffer" );
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return;
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}
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ctx->Color.DrawBuffer = mode;
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ctx->Buffer->Alpha = ctx->Buffer->FrontAlpha;
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ctx->NewState |= NEW_RASTER_OPS;
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break;
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case GL_BACK:
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case GL_BACK_LEFT:
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if ( (*ctx->Driver.SetBuffer)( ctx, GL_BACK ) == GL_FALSE) {
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gl_error( ctx, GL_INVALID_ENUM, "glDrawBuffer" );
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return;
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}
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ctx->Color.DrawBuffer = mode;
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ctx->Buffer->Alpha = ctx->Buffer->BackAlpha;
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ctx->NewState |= NEW_RASTER_OPS;
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break;
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case GL_NONE:
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ctx->Color.DrawBuffer = mode;
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ctx->Buffer->Alpha = NULL;
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ctx->NewState |= NEW_RASTER_OPS;
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break;
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case GL_FRONT_RIGHT:
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case GL_BACK_RIGHT:
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case GL_LEFT:
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case GL_RIGHT:
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case GL_AUX0:
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gl_error( ctx, GL_INVALID_OPERATION, "glDrawBuffer" );
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break;
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default:
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gl_error( ctx, GL_INVALID_ENUM, "glDrawBuffer" );
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}
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}
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void gl_ReadBuffer( GLcontext *ctx, GLenum mode )
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{
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if (INSIDE_BEGIN_END(ctx)) {
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gl_error( ctx, GL_INVALID_OPERATION, "glReadBuffer" );
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return;
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}
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switch (mode) {
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case GL_FRONT:
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case GL_FRONT_LEFT:
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if ( (*ctx->Driver.SetBuffer)( ctx, GL_FRONT ) == GL_FALSE) {
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gl_error( ctx, GL_INVALID_ENUM, "glReadBuffer" );
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return;
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}
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ctx->Pixel.ReadBuffer = mode;
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ctx->Buffer->Alpha = ctx->Buffer->FrontAlpha;
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ctx->NewState |= NEW_RASTER_OPS;
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break;
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case GL_BACK:
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case GL_BACK_LEFT:
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if ( (*ctx->Driver.SetBuffer)( ctx, GL_BACK ) == GL_FALSE) {
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gl_error( ctx, GL_INVALID_ENUM, "glReadBuffer" );
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return;
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}
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ctx->Pixel.ReadBuffer = mode;
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ctx->Buffer->Alpha = ctx->Buffer->BackAlpha;
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ctx->NewState |= NEW_RASTER_OPS;
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break;
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case GL_FRONT_RIGHT:
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case GL_BACK_RIGHT:
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case GL_LEFT:
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case GL_RIGHT:
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case GL_AUX0:
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gl_error( ctx, GL_INVALID_OPERATION, "glReadBuffer" );
|
|
break;
|
|
default:
|
|
gl_error( ctx, GL_INVALID_ENUM, "glReadBuffer" );
|
|
}
|
|
|
|
/* Remember, the draw buffer is the default state */
|
|
(void) (*ctx->Driver.SetBuffer)( ctx, ctx->Color.DrawBuffer );
|
|
}
|