colortab.c revision 485f04074151686fa24d40e3eeb83029d3d8c425 
1/* $Id: colortab.c,v 1.2 1999/10/08 09:27:10 keithw Exp $ */
2
3/*
4 * Mesa 3-D graphics library
5 * Version:  3.1
6 *
7 * Copyright (C) 1999  Brian Paul   All Rights Reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26/* $XFree86: xc/lib/GL/mesa/src/colortab.c,v 1.2 1999/04/04 00:20:21 dawes Exp $ */
27
28
29
30
31
32#ifdef PC_HEADER
33#include "all.h"
34#else
35#ifdef XFree86Server
36#include "GL/xf86glx.h"
37#endif
38#include "colortab.h"
39#include "context.h"
40#include "macros.h"
41#ifdef XFree86Server
42#include "GL/xf86glx.h"
43#endif
44#endif
45
46
47
48/*
49 * Return GL_TRUE if k is a power of two, else return GL_FALSE.
50 */
51static GLboolean power_of_two( GLint k )
52{
53   GLint i, m = 1;
54   for (i=0; i<32; i++) {
55      if (k == m)
56         return GL_TRUE;
57      m = m << 1;
58   }
59   return GL_FALSE;
60}
61
62
63static GLint decode_internal_format( GLint format )
64{
65   switch (format) {
66      case GL_ALPHA:
67      case GL_ALPHA4:
68      case GL_ALPHA8:
69      case GL_ALPHA12:
70      case GL_ALPHA16:
71         return GL_ALPHA;
72      case 1:
73      case GL_LUMINANCE:
74      case GL_LUMINANCE4:
75      case GL_LUMINANCE8:
76      case GL_LUMINANCE12:
77      case GL_LUMINANCE16:
78         return GL_LUMINANCE;
79      case 2:
80      case GL_LUMINANCE_ALPHA:
81      case GL_LUMINANCE4_ALPHA4:
82      case GL_LUMINANCE6_ALPHA2:
83      case GL_LUMINANCE8_ALPHA8:
84      case GL_LUMINANCE12_ALPHA4:
85      case GL_LUMINANCE12_ALPHA12:
86      case GL_LUMINANCE16_ALPHA16:
87         return GL_LUMINANCE_ALPHA;
88      case GL_INTENSITY:
89      case GL_INTENSITY4:
90      case GL_INTENSITY8:
91      case GL_INTENSITY12:
92      case GL_INTENSITY16:
93         return GL_INTENSITY;
94      case 3:
95      case GL_RGB:
96      case GL_R3_G3_B2:
97      case GL_RGB4:
98      case GL_RGB5:
99      case GL_RGB8:
100      case GL_RGB10:
101      case GL_RGB12:
102      case GL_RGB16:
103         return GL_RGB;
104      case 4:
105      case GL_RGBA:
106      case GL_RGBA2:
107      case GL_RGBA4:
108      case GL_RGB5_A1:
109      case GL_RGBA8:
110      case GL_RGB10_A2:
111      case GL_RGBA12:
112      case GL_RGBA16:
113         return GL_RGBA;
114      default:
115         return -1;  /* error */
116   }
117}
118
119
120void gl_ColorTable( GLcontext *ctx, GLenum target,
121                    GLenum internalFormat, struct gl_image *table )
122{
123   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
124   struct gl_texture_object *texObj;
125   GLboolean proxy = GL_FALSE;
126
127   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glColorTable");
128
129   if (decode_internal_format(internalFormat) < 0) {
130      gl_error( ctx, GL_INVALID_ENUM, "glColorTable(internalFormat)" );
131      return;
132   }
133
134   switch (target) {
135      case GL_TEXTURE_1D:
136         texObj = texUnit->CurrentD[1];
137         break;
138      case GL_TEXTURE_2D:
139         texObj = texUnit->CurrentD[2];
140         break;
141      case GL_TEXTURE_3D_EXT:
142         texObj = texUnit->CurrentD[3];
143         break;
144      case GL_PROXY_TEXTURE_1D:
145         texObj = ctx->Texture.Proxy1D;
146         proxy = GL_TRUE;
147         break;
148      case GL_PROXY_TEXTURE_2D:
149         texObj = ctx->Texture.Proxy2D;
150         proxy = GL_TRUE;
151         break;
152      case GL_PROXY_TEXTURE_3D_EXT:
153         texObj = ctx->Texture.Proxy3D;
154         proxy = GL_TRUE;
155         break;
156      case GL_SHARED_TEXTURE_PALETTE_EXT:
157         texObj = NULL;
158         break;
159      default:
160         gl_error(ctx, GL_INVALID_ENUM, "glColorTableEXT(target)");
161         return;
162   }
163
164   /* internalformat = just like glTexImage */
165
166   if (table->Width < 1 || table->Width > MAX_TEXTURE_PALETTE_SIZE
167       || !power_of_two(table->Width)) {
168      gl_error(ctx, GL_INVALID_VALUE, "glColorTableEXT(width)");
169      if (proxy) {
170         texObj->PaletteSize = 0;
171         texObj->PaletteIntFormat = (GLenum) 0;
172         texObj->PaletteFormat = (GLenum) 0;
173      }
174      return;
175   }
176
177   if (texObj) {
178      /* per-texture object palette */
179      texObj->PaletteSize = table->Width;
180      texObj->PaletteIntFormat = internalFormat;
181      texObj->PaletteFormat = (GLenum) decode_internal_format(internalFormat);
182      if (!proxy) {
183         MEMCPY(texObj->Palette, table->Data, table->Width*table->Components);
184         if (ctx->Driver.UpdateTexturePalette) {
185            (*ctx->Driver.UpdateTexturePalette)( ctx, texObj );
186         }
187      }
188   }
189   else {
190      /* shared texture palette */
191      ctx->Texture.PaletteSize = table->Width;
192      ctx->Texture.PaletteIntFormat = internalFormat;
193      ctx->Texture.PaletteFormat = (GLenum) decode_internal_format(internalFormat);
194      MEMCPY(ctx->Texture.Palette, table->Data, table->Width*table->Components);
195      if (ctx->Driver.UpdateTexturePalette) {
196         (*ctx->Driver.UpdateTexturePalette)( ctx, NULL );
197      }
198   }
199}
200
201
202
203void gl_ColorSubTable( GLcontext *ctx, GLenum target,
204                       GLsizei start, struct gl_image *data )
205{
206   /* XXX TODO */
207   gl_problem(ctx, "glColorSubTableEXT not implemented");
208   (void) target;
209   (void) start;
210   (void) data;
211}
212
213
214
215void gl_GetColorTable( GLcontext *ctx, GLenum target, GLenum format,
216                       GLenum type, GLvoid *table )
217{
218   ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetBooleanv");
219
220   switch (target) {
221      case GL_TEXTURE_1D:
222         break;
223      case GL_TEXTURE_2D:
224         break;
225      case GL_TEXTURE_3D_EXT:
226         break;
227      case GL_SHARED_TEXTURE_PALETTE_EXT:
228         break;
229      default:
230         gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableEXT(target)");
231         return;
232   }
233
234   gl_problem(ctx, "glGetColorTableEXT not implemented!");
235   (void) format;
236   (void) type;
237   (void) table;
238}
239
240
241
242void gl_GetColorTableParameterfv( GLcontext *ctx, GLenum target,
243                                  GLenum pname, GLfloat *params )
244{
245   GLint iparams[10];
246
247   gl_GetColorTableParameteriv( ctx, target, pname, iparams );
248   *params = (GLfloat) iparams[0];
249}
250
251
252
253void gl_GetColorTableParameteriv( GLcontext *ctx, GLenum target,
254                                  GLenum pname, GLint *params )
255{
256   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
257   struct gl_texture_object *texObj;
258
259   ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetColorTableParameter");
260
261   switch (target) {
262      case GL_TEXTURE_1D:
263         texObj = texUnit->CurrentD[1];
264         break;
265      case GL_TEXTURE_2D:
266         texObj = texUnit->CurrentD[2];
267         break;
268      case GL_TEXTURE_3D_EXT:
269         texObj = texUnit->CurrentD[3];
270         break;
271      case GL_SHARED_TEXTURE_PALETTE_EXT:
272         texObj = NULL;
273         break;
274      default:
275         gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter(target)");
276         return;
277   }
278
279   switch (pname) {
280      case GL_COLOR_TABLE_FORMAT_EXT:
281         if (texObj)
282            *params = texObj->PaletteIntFormat;
283         else
284            *params = ctx->Texture.PaletteIntFormat;
285         break;
286      case GL_COLOR_TABLE_WIDTH_EXT:
287         if (texObj)
288            *params = texObj->PaletteSize;
289         else
290            *params = ctx->Texture.PaletteSize;
291         break;
292      case GL_COLOR_TABLE_RED_SIZE_EXT:
293         *params = 8;
294         break;
295      case GL_COLOR_TABLE_GREEN_SIZE_EXT:
296         *params = 8;
297         break;
298      case GL_COLOR_TABLE_BLUE_SIZE_EXT:
299         *params = 8;
300         break;
301      case GL_COLOR_TABLE_ALPHA_SIZE_EXT:
302         *params = 8;
303         break;
304      case GL_COLOR_TABLE_LUMINANCE_SIZE_EXT:
305         *params = 8;
306         break;
307      case GL_COLOR_TABLE_INTENSITY_SIZE_EXT:
308         *params = 8;
309         break;
310      default:
311         gl_error(ctx, GL_INVALID_ENUM, "glGetColorTableParameter" );
312         return;
313   }
314}
315
316
317