/* $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; } }