reactos/dll/opengl/mesa/colortab.c

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/* $Id: colortab.c,v 1.6 1997/10/16 02:26:18 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 2.5
* 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: colortab.c,v $
* Revision 1.6 1997/10/16 02:26:18 brianp
* call Driver.UpdateTexturePalette(ctx,NULL) when shared palette changed
*
* Revision 1.5 1997/10/16 01:59:08 brianp
* added GL_EXT_shared_texture_palette extension
*
* Revision 1.4 1997/10/15 23:37:05 brianp
* removed dirty flag stuff
*
* Revision 1.3 1997/10/13 23:50:03 brianp
* added call to Driver.UpdateTexturePalette
*
* Revision 1.2 1997/09/29 23:27:44 brianp
* updated for new device driver texture functions
*
* Revision 1.1 1997/09/27 00:12:46 brianp
* Initial revision
*
*/
#ifdef PC_HEADER
#include "all.h"
#else
#include "colortab.h"
#include "context.h"
#include "macros.h"
#endif
/*
* Return GL_TRUE if k is a power of two, else return GL_FALSE.
*/
static GLboolean power_of_two( GLint k )
{
GLint i, m = 1;
for (i=0; i<32; i++) {
if (k == m)
return GL_TRUE;
m = m << 1;
}
return GL_FALSE;
}
static GLint decode_internal_format( GLint format )
{
switch (format) {
case GL_ALPHA:
case GL_ALPHA4:
case GL_ALPHA8:
case GL_ALPHA12:
case GL_ALPHA16:
return GL_ALPHA;
case 1:
case GL_LUMINANCE:
case GL_LUMINANCE4:
case GL_LUMINANCE8:
case GL_LUMINANCE12:
case GL_LUMINANCE16:
return GL_LUMINANCE;
case 2:
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE4_ALPHA4:
case GL_LUMINANCE6_ALPHA2:
case GL_LUMINANCE8_ALPHA8:
case GL_LUMINANCE12_ALPHA4:
case GL_LUMINANCE12_ALPHA12:
case GL_LUMINANCE16_ALPHA16:
return GL_LUMINANCE_ALPHA;
case GL_INTENSITY:
case GL_INTENSITY4:
case GL_INTENSITY8:
case GL_INTENSITY12:
case GL_INTENSITY16:
return GL_INTENSITY;
case 3:
case GL_RGB:
case GL_R3_G3_B2:
case GL_RGB4:
case GL_RGB5:
case GL_RGB8:
case GL_RGB10:
case GL_RGB12:
case GL_RGB16:
return GL_RGB;
case 4:
case GL_RGBA:
case GL_RGBA2:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGBA8:
case GL_RGB10_A2:
case GL_RGBA12:
case GL_RGBA16:
return GL_RGBA;
default:
return -1; /* error */
}
}
void gl_ColorTable( GLcontext *ctx, GLenum target,
GLenum internalFormat, struct gl_image *table )
{
struct gl_texture_object *texObj;
GLboolean proxy = GL_FALSE;
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glGetBooleanv" );
return;
}
switch (target) {
case GL_TEXTURE_1D:
texObj = ctx->Texture.Current1D;
break;
case GL_TEXTURE_2D:
texObj = ctx->Texture.Current2D;
break;
case GL_PROXY_TEXTURE_1D:
texObj = ctx->Texture.Proxy1D;
proxy = GL_TRUE;
break;
case GL_PROXY_TEXTURE_2D:
texObj = ctx->Texture.Proxy2D;
proxy = GL_TRUE;
break;
default:
gl_error(ctx, GL_INVALID_ENUM, "glColorTableEXT(target)");
return;
}
/* internalformat = just like glTexImage */
if (table->Width < 1 || table->Width > MAX_TEXTURE_PALETTE_SIZE
|| !power_of_two(table->Width)) {
gl_error(ctx, GL_INVALID_VALUE, "glColorTableEXT(width)");
if (proxy) {
texObj->PaletteSize = 0;
texObj->PaletteIntFormat = 0;
texObj->PaletteFormat = 0;
}
return;
}
/* per-texture object palette */
texObj->PaletteSize = table->Width;
texObj->PaletteIntFormat = internalFormat;
texObj->PaletteFormat = decode_internal_format(internalFormat);
if (!proxy) {
MEMCPY(texObj->Palette, table->Data, table->Width*table->Components);
if (ctx->Driver.UpdateTexturePalette) {
(*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
}
}
}
void gl_ColorSubTable( GLcontext *ctx, GLenum target,
GLsizei start, struct gl_image *data )
{
/* XXX TODO */
gl_problem(ctx, "glColorSubTableEXT not implemented");
}
void gl_GetColorTable( GLcontext *ctx, GLenum target, GLenum format,
GLenum type, GLvoid *table )
{
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glGetBooleanv" );
return;
}
switch (target) {
case GL_TEXTURE_1D:
break;
case GL_TEXTURE_2D:
break;
case GL_TEXTURE_3D_EXT:
break;
default:
gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableEXT(target)");
return;
}
gl_problem(ctx, "glGetColorTableEXT not implemented!");
}
void gl_GetColorTableParameterfv( GLcontext *ctx, GLenum target,
GLenum pname, GLfloat *params )
{
GLint iparams[10];
gl_GetColorTableParameteriv( ctx, target, pname, iparams );
*params = (GLfloat) iparams[0];
}
void gl_GetColorTableParameteriv( GLcontext *ctx, GLenum target,
GLenum pname, GLint *params )
{
struct gl_texture_object *texObj;
if (INSIDE_BEGIN_END(ctx)) {
gl_error( ctx, GL_INVALID_OPERATION, "glGetColorTableParameter" );
return;
}
switch (target) {
case GL_TEXTURE_1D:
texObj = ctx->Texture.Current1D;
break;
case GL_TEXTURE_2D:
texObj = ctx->Texture.Current2D;
break;
default:
gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
return;
}
switch (pname) {
case GL_COLOR_TABLE_FORMAT_EXT:
if (texObj)
*params = texObj->PaletteIntFormat;
break;
case GL_COLOR_TABLE_WIDTH_EXT:
if (texObj)
*params = texObj->PaletteSize;
break;
case GL_COLOR_TABLE_RED_SIZE_EXT:
*params = 8;
break;
case GL_COLOR_TABLE_GREEN_SIZE_EXT:
*params = 8;
break;
case GL_COLOR_TABLE_BLUE_SIZE_EXT:
*params = 8;
break;
case GL_COLOR_TABLE_ALPHA_SIZE_EXT:
*params = 8;
break;
case GL_COLOR_TABLE_LUMINANCE_SIZE_EXT:
*params = 8;
break;
case GL_COLOR_TABLE_INTENSITY_SIZE_EXT:
*params = 8;
break;
default:
gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter" );
return;
}
}