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Mesa-3.1
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colortab.c
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2000-01-07
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/* $Id: colortab.c,v 1.3 1999/11/08 07:36:43 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.1
*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/* $XFree86: xc/lib/GL/mesa/src/colortab.c,v 1.2 1999/04/04 00:20:21 dawes Exp $ */
#ifdef PC_HEADER
#include "all.h"
#else
#ifdef XFree86Server
#include "GL/xf86glx.h"
#endif
#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_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
struct gl_texture_object *texObj;
GLboolean proxy = GL_FALSE;
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glColorTable");
if (decode_internal_format(internalFormat) < 0) {
gl_error( ctx, GL_INVALID_ENUM, "glColorTable(internalFormat)" );
return;
}
switch (target) {
case GL_TEXTURE_1D:
texObj = texUnit->CurrentD[1];
break;
case GL_TEXTURE_2D:
texObj = texUnit->CurrentD[2];
break;
case GL_TEXTURE_3D_EXT:
texObj = texUnit->CurrentD[3];
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;
case GL_PROXY_TEXTURE_3D_EXT:
texObj = ctx->Texture.Proxy3D;
proxy = GL_TRUE;
break;
case GL_SHARED_TEXTURE_PALETTE_EXT:
texObj = NULL;
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 = (GLenum) 0;
texObj->PaletteFormat = (GLenum) 0;
}
return;
}
if (texObj) {
/* per-texture object palette */
texObj->PaletteSize = table->Width;
texObj->PaletteIntFormat = internalFormat;
texObj->PaletteFormat = (GLenum) decode_internal_format(internalFormat);
if (!proxy) {
MEMCPY(texObj->Palette, table->Data, table->Width*table->Components);
if (ctx->Driver.UpdateTexturePalette) {
(*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
}
}
}
else {
/* shared texture palette */
ctx->Texture.PaletteSize = table->Width;
ctx->Texture.PaletteIntFormat = internalFormat;
ctx->Texture.PaletteFormat = (GLenum) decode_internal_format(internalFormat);
MEMCPY(ctx->Texture.Palette, table->Data, table->Width*table->Components);
if (ctx->Driver.UpdateTexturePalette) {
(*ctx->Driver.UpdateTexturePalette)( ctx, NULL );
}
}
}
void gl_ColorSubTable( GLcontext *ctx, GLenum target,
GLsizei start, struct gl_image *data )
{
/* XXX TODO */
gl_problem(ctx, "glColorSubTableEXT not implemented");
(void) target;
(void) start;
(void) data;
}
void gl_GetColorTable( GLcontext *ctx, GLenum target, GLenum format,
GLenum type, GLvoid *table )
{
ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetBooleanv");
switch (target) {
case GL_TEXTURE_1D:
break;
case GL_TEXTURE_2D:
break;
case GL_TEXTURE_3D_EXT:
break;
case GL_SHARED_TEXTURE_PALETTE_EXT:
break;
default:
gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableEXT(target)");
return;
}
gl_problem(ctx, "glGetColorTableEXT not implemented!");
(void) format;
(void) type;
(void) table;
}
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_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
struct gl_texture_object *texObj;
ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetColorTableParameter");
switch (target) {
case GL_TEXTURE_1D:
texObj = texUnit->CurrentD[1];
break;
case GL_TEXTURE_2D:
texObj = texUnit->CurrentD[2];
break;
case GL_TEXTURE_3D_EXT:
texObj = texUnit->CurrentD[3];
break;
case GL_SHARED_TEXTURE_PALETTE_EXT:
texObj = NULL;
break;
default:
gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
return;
}
switch (pname) {
case GL_COLOR_TABLE_FORMAT_EXT:
if (texObj)
*params = texObj->PaletteIntFormat;
else
*params = ctx->Texture.PaletteIntFormat;
break;
case GL_COLOR_TABLE_WIDTH_EXT:
if (texObj)
*params = texObj->PaletteSize;
else
*params = ctx->Texture.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;
}
}