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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_TEXTURE_3D_EXT:
- texObj = ctx->Texture.Current3D;
- 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 = 0;
- texObj->PaletteFormat = 0;
- }
- return;
- }
-
- if (texObj) {
- /* 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 );
- }
- }
- }
- else {
- /* shared texture palette */
- ctx->Texture.PaletteSize = table->Width;
- ctx->Texture.PaletteIntFormat = internalFormat;
- ctx->Texture.PaletteFormat = 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 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;
- case GL_SHARED_TEXTURE_PALETTE_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;
- case GL_TEXTURE_3D_EXT:
- texObj = ctx->Texture.Current3D;
- 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;
- }
- }
-
-
-