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reactos/dll/opengl/mesa/misc.c
Jérôme Gardou 5f2bebf7a5 [OPENGL32][MESA] Downgrade Mesa library to version 2.6 
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
2019-01-19 14:23:54 +01:00

495 lines
14 KiB
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/* $Id: misc.c,v 1.23 1997/12/06 18:07:13 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 2.6
* Copyright (C) 1995-1997 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* $Log: misc.c,v $
* Revision 1.23 1997/12/06 18:07:13 brianp
* changed version to 2.6
*
* Revision 1.22 1997/12/05 04:38:55 brianp
* added ClearColorAndDepth() function pointer (David Bucciarelli)
*
* Revision 1.21 1997/10/29 01:29:09 brianp
* added GL_EXT_point_parameters extension from Daniel Barrero
*
* Revision 1.20 1997/10/16 02:32:19 brianp
* added GL_EXT_shared_texture_palette extension
*
* Revision 1.19 1997/10/14 00:17:48 brianp
* added 3DFX_set_global_palette to extension string for 3Dfx
*
* Revision 1.18 1997/09/27 00:13:44 brianp
* added GL_EXT_paletted_texture extension
*
* Revision 1.17 1997/08/13 01:26:40 brianp
* changed version string to 2.4
*
* Revision 1.16 1997/07/24 01:23:16 brianp
* changed precompiled header symbol from PCH to PC_HEADER
*
* Revision 1.15 1997/06/20 02:21:36 brianp
* don't clear buffers if RenderMode != GL_RENDER
*
* Revision 1.14 1997/05/28 03:25:43 brianp
* added precompiled header (PCH) support
*
* Revision 1.13 1997/04/12 12:31:18 brianp
* removed gl_Rectf()
*
* Revision 1.12 1997/03/21 01:58:54 brianp
* now call Driver.RendererString() in gl_GetString()
*
* Revision 1.11 1997/02/10 20:40:51 brianp
* added GL_MESA_resize_buffers to extensions string
*
* Revision 1.10 1997/02/09 18:44:35 brianp
* added GL_EXT_texture3D support
*
* Revision 1.9 1997/01/08 20:55:02 brianp
* added GL_EXT_texture_object
*
* Revision 1.8 1996/11/05 01:41:45 brianp
* fixed potential scissor/clear color buffer bug
*
* Revision 1.7 1996/10/30 03:14:02 brianp
* incremented version to 2.1
*
* Revision 1.6 1996/10/11 03:42:17 brianp
* added GL_EXT_polygon_offset to extensions string
*
* Revision 1.5 1996/10/02 02:51:44 brianp
* created clear_color_buffers() which handles draw mode GL_FRONT_AND_BACK
*
* Revision 1.4 1996/09/25 03:22:14 brianp
* glDrawBuffer(GL_NONE) works now
*
* Revision 1.3 1996/09/24 00:16:10 brianp
* set NewState flag in glRead/DrawBuffer() and glHint()
* fixed display list bug in gl_Hint()
*
* Revision 1.2 1996/09/15 14:18:37 brianp
* now use GLframebuffer and GLvisual
*
* Revision 1.1 1996/09/13 01:38:16 brianp
* Initial revision
*
*/
#ifdef PC_HEADER
#include "all.h"
#else
#include <stdlib.h>
#include <string.h>
#include "accum.h"
#include "alphabuf.h"
#include "context.h"
#include "depth.h"
#include "macros.h"
#include "masking.h"
#include "misc.h"
#include "stencil.h"
#include "types.h"
#endif
void gl_ClearIndex( GLcontext *ctx, GLfloat c )
{
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glClearIndex" );
return;
}
ctx->Color.ClearIndex = (GLuint) c;
if (!ctx->Visual->RGBAflag) {
/* it's OK to call glClearIndex in RGBA mode but it should be a NOP */
(*ctx->Driver.ClearIndex)( ctx, ctx->Color.ClearIndex );
}
}
void gl_ClearColor( GLcontext *ctx, GLclampf red, GLclampf green,
GLclampf blue, GLclampf alpha )
{
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glClearColor" );
return;
}
ctx->Color.ClearColor[0] = CLAMP( red, 0.0F, 1.0F );
ctx->Color.ClearColor[1] = CLAMP( green, 0.0F, 1.0F );
ctx->Color.ClearColor[2] = CLAMP( blue, 0.0F, 1.0F );
ctx->Color.ClearColor[3] = CLAMP( alpha, 0.0F, 1.0F );
if (ctx->Visual->RGBAflag) {
GLubyte r = (GLint) (ctx->Color.ClearColor[0] * ctx->Visual->RedScale);
GLubyte g = (GLint) (ctx->Color.ClearColor[1] * ctx->Visual->GreenScale);
GLubyte b = (GLint) (ctx->Color.ClearColor[2] * ctx->Visual->BlueScale);
GLubyte a = (GLint) (ctx->Color.ClearColor[3] * ctx->Visual->AlphaScale);
(*ctx->Driver.ClearColor)( ctx, r, g, b, a );
}
}
/*
* Clear the color buffer when glColorMask or glIndexMask is in effect.
*/
static void clear_color_buffer_with_masking( GLcontext *ctx )
{
GLint x, y, height, width;
/* Compute region to clear */
if (ctx->Scissor.Enabled) {
x = ctx->Buffer->Xmin;
y = ctx->Buffer->Ymin;
height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
width = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
}
else {
x = 0;
y = 0;
height = ctx->Buffer->Height;
width = ctx->Buffer->Width;
}
if (ctx->Visual->RGBAflag) {
/* RGBA mode */
GLubyte red[MAX_WIDTH], green[MAX_WIDTH];
GLubyte blue[MAX_WIDTH], alpha[MAX_WIDTH];
GLubyte r = ctx->Color.ClearColor[0] * ctx->Visual->RedScale;
GLubyte g = ctx->Color.ClearColor[1] * ctx->Visual->GreenScale;
GLubyte b = ctx->Color.ClearColor[2] * ctx->Visual->BlueScale;
GLubyte a = ctx->Color.ClearColor[3] * ctx->Visual->AlphaScale;
GLint i;
for (i=0;i<height;i++,y++) {
MEMSET( red, (int) r, width );
MEMSET( green, (int) g, width );
MEMSET( blue, (int) b, width );
MEMSET( alpha, (int) a, width );
gl_mask_color_span( ctx, width, x, y, red, green, blue, alpha );
(*ctx->Driver.WriteColorSpan)( ctx,
width, x, y, red, green, blue, alpha, NULL );
if (ctx->RasterMask & ALPHABUF_BIT) {
gl_write_alpha_span( ctx, width, x, y, alpha, NULL );
}
}
}
else {
/* Color index mode */
GLuint indx[MAX_WIDTH];
GLubyte mask[MAX_WIDTH];
GLint i, j;
MEMSET( mask, 1, width );
for (i=0;i<height;i++,y++) {
for (j=0;j<width;j++) {
indx[j] = ctx->Color.ClearIndex;
}
gl_mask_index_span( ctx, width, x, y, indx );
(*ctx->Driver.WriteIndexSpan)( ctx, width, x, y, indx, mask );
}
}
}
/*
* Clear the front and/or back color buffers. Also clear the alpha
* buffer(s) if present.
*/
static void clear_color_buffers( GLcontext *ctx )
{
if (ctx->Color.SWmasking) {
clear_color_buffer_with_masking( ctx );
}
else {
GLint x = ctx->Buffer->Xmin;
GLint y = ctx->Buffer->Ymin;
GLint height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
GLint width = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
(*ctx->Driver.Clear)( ctx, !ctx->Scissor.Enabled,
x, y, width, height );
if (ctx->RasterMask & ALPHABUF_BIT) {
/* front and/or back alpha buffers will be cleared here */
gl_clear_alpha_buffers( ctx );
}
}
if (ctx->RasterMask & FRONT_AND_BACK_BIT) {
/*** Also clear the back buffer ***/
(*ctx->Driver.SetBuffer)( ctx, GL_BACK );
if (ctx->Color.SWmasking) {
clear_color_buffer_with_masking( ctx );
}
else {
GLint x = ctx->Buffer->Xmin;
GLint y = ctx->Buffer->Ymin;
GLint height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
GLint width = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
(*ctx->Driver.Clear)( ctx, !ctx->Scissor.Enabled,
x, y, width, height );
}
(*ctx->Driver.SetBuffer)( ctx, GL_FRONT );
}
}
void gl_Clear( GLcontext *ctx, GLbitfield mask )
{
#ifdef PROFILE
GLdouble t0 = gl_time();
#endif
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glClear" );
return;
}
if (ctx->RenderMode==GL_RENDER) {
if (ctx->NewState) {
gl_update_state( ctx );
}
/* See if we can call device driver function to clear both the
* color and depth buffers.
*/
if (ctx->Driver.ClearColorAndDepth &&
(mask & GL_COLOR_BUFFER_BIT) && (mask & GL_DEPTH_BUFFER_BIT)) {
GLint x = ctx->Buffer->Xmin;
GLint y = ctx->Buffer->Ymin;
GLint height = ctx->Buffer->Ymax - ctx->Buffer->Ymin + 1;
GLint width = ctx->Buffer->Xmax - ctx->Buffer->Xmin + 1;
(*ctx->Driver.ClearColorAndDepth)( ctx, !ctx->Scissor.Enabled,
x, y, width, height );
if (ctx->RasterMask & FRONT_AND_BACK_BIT) {
/*** Also clear the back buffer ***/
(*ctx->Driver.SetBuffer)( ctx, GL_BACK );
(*ctx->Driver.ClearColorAndDepth)( ctx, !ctx->Scissor.Enabled,
x, y, width, height );
(*ctx->Driver.SetBuffer)( ctx, GL_FRONT );
}
}
else {
/* normal procedure for clearing buffers */
if (mask & GL_COLOR_BUFFER_BIT) clear_color_buffers( ctx );
if (mask & GL_DEPTH_BUFFER_BIT) (*ctx->Driver.ClearDepthBuffer)(ctx);
if (mask & GL_ACCUM_BUFFER_BIT) gl_clear_accum_buffer( ctx );
if (mask & GL_STENCIL_BUFFER_BIT) gl_clear_stencil_buffer( ctx );
}
#ifdef PROFILE
ctx->ClearTime += gl_time() - t0;
ctx->ClearCount++;
#endif
}
}
const GLubyte *gl_GetString( GLcontext *ctx, GLenum name )
{
static char renderer[1000];
static char *vendor = "Brian Paul & ReactOS Developers";
static char *version = "1.1";
static char *extensions = "GL_EXT_paletted_texture GL_EXT_bgra GL_WIN_swap_hint";
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glGetString" );
return (GLubyte *) 0;
}
switch (name) {
case GL_VENDOR:
return (GLubyte *) vendor;
case GL_RENDERER:
strcpy(renderer, "Mesa");
if (ctx->Driver.RendererString) {
strcat(renderer, " ");
strcat(renderer, (*ctx->Driver.RendererString)());
}
return (GLubyte *) renderer;
case GL_VERSION:
return (GLubyte *) version;
case GL_EXTENSIONS:
return (GLubyte *) extensions;
default:
gl_error( ctx, GL_INVALID_ENUM, "glGetString" );
return (GLubyte *) 0;
}
}
void gl_Finish( GLcontext *ctx )
{
/* Don't compile into display list */
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glFinish" );
return;
}
if (ctx->Driver.Finish) {
(*ctx->Driver.Finish)( ctx );
}
}
void gl_Flush( GLcontext *ctx )
{
/* Don't compile into display list */
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glFlush" );
return;
}
if (ctx->Driver.Flush) {
(*ctx->Driver.Flush)( ctx );
}
}
void gl_Hint( GLcontext *ctx, GLenum target, GLenum mode )
{
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glHint" );
return;
}
if (mode!=GL_DONT_CARE && mode!=GL_FASTEST && mode!=GL_NICEST) {
gl_error( ctx, GL_INVALID_ENUM, "glHint(mode)" );
return;
}
switch (target) {
case GL_FOG_HINT:
ctx->Hint.Fog = mode;
break;
case GL_LINE_SMOOTH_HINT:
ctx->Hint.LineSmooth = mode;
break;
case GL_PERSPECTIVE_CORRECTION_HINT:
ctx->Hint.PerspectiveCorrection = mode;
break;
case GL_POINT_SMOOTH_HINT:
ctx->Hint.PointSmooth = mode;
break;
case GL_POLYGON_SMOOTH_HINT:
ctx->Hint.PolygonSmooth = mode;
break;
default:
gl_error( ctx, GL_INVALID_ENUM, "glHint(target)" );
}
ctx->NewState |= NEW_ALL; /* just to be safe */
}
void gl_DrawBuffer( GLcontext *ctx, GLenum mode )
{
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glDrawBuffer" );
return;
}
switch (mode) {
case GL_FRONT:
case GL_FRONT_LEFT:
case GL_FRONT_AND_BACK:
if ( (*ctx->Driver.SetBuffer)( ctx, GL_FRONT ) == GL_FALSE ) {
gl_error( ctx, GL_INVALID_ENUM, "glDrawBuffer" );
return;
}
ctx->Color.DrawBuffer = mode;
ctx->Buffer->Alpha = ctx->Buffer->FrontAlpha;
ctx->NewState |= NEW_RASTER_OPS;
break;
case GL_BACK:
case GL_BACK_LEFT:
if ( (*ctx->Driver.SetBuffer)( ctx, GL_BACK ) == GL_FALSE) {
gl_error( ctx, GL_INVALID_ENUM, "glDrawBuffer" );
return;
}
ctx->Color.DrawBuffer = mode;
ctx->Buffer->Alpha = ctx->Buffer->BackAlpha;
ctx->NewState |= NEW_RASTER_OPS;
break;
case GL_NONE:
ctx->Color.DrawBuffer = mode;
ctx->Buffer->Alpha = NULL;
ctx->NewState |= NEW_RASTER_OPS;
break;
case GL_FRONT_RIGHT:
case GL_BACK_RIGHT:
case GL_LEFT:
case GL_RIGHT:
case GL_AUX0:
gl_error( ctx, GL_INVALID_OPERATION, "glDrawBuffer" );
break;
default:
gl_error( ctx, GL_INVALID_ENUM, "glDrawBuffer" );
}
}
void gl_ReadBuffer( GLcontext *ctx, GLenum mode )
{
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glReadBuffer" );
return;
}
switch (mode) {
case GL_FRONT:
case GL_FRONT_LEFT:
if ( (*ctx->Driver.SetBuffer)( ctx, GL_FRONT ) == GL_FALSE) {
gl_error( ctx, GL_INVALID_ENUM, "glReadBuffer" );
return;
}
ctx->Pixel.ReadBuffer = mode;
ctx->Buffer->Alpha = ctx->Buffer->FrontAlpha;
ctx->NewState |= NEW_RASTER_OPS;
break;
case GL_BACK:
case GL_BACK_LEFT:
if ( (*ctx->Driver.SetBuffer)( ctx, GL_BACK ) == GL_FALSE) {
gl_error( ctx, GL_INVALID_ENUM, "glReadBuffer" );
return;
}
ctx->Pixel.ReadBuffer = mode;
ctx->Buffer->Alpha = ctx->Buffer->BackAlpha;
ctx->NewState |= NEW_RASTER_OPS;
break;
case GL_FRONT_RIGHT:
case GL_BACK_RIGHT:
case GL_LEFT:
case GL_RIGHT:
case GL_AUX0:
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 );
}
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