st_gen_mipmap.c revision ac400ffce62be47fc77e8d10cabcd39b92b6c627 
1/**************************************************************************
2 *
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28
29#include "main/imports.h"
30#include "main/macros.h"
31#include "main/mipmap.h"
32#include "main/teximage.h"
33#include "main/texformat.h"
34
35#include "shader/prog_instruction.h"
36
37#include "pipe/p_context.h"
38#include "pipe/p_defines.h"
39#include "pipe/p_inlines.h"
40#include "util/u_gen_mipmap.h"
41#include "util/u_math.h"
42
43#include "cso_cache/cso_cache.h"
44#include "cso_cache/cso_context.h"
45
46#include "st_debug.h"
47#include "st_context.h"
48#include "st_draw.h"
49#include "st_gen_mipmap.h"
50#include "st_program.h"
51#include "st_texture.h"
52#include "st_cb_texture.h"
53#include "st_inlines.h"
54
55
56/**
57 * one-time init for generate mipmap
58 * XXX Note: there may be other times we need no-op/simple state like this.
59 * In that case, some code refactoring would be good.
60 */
61void
62st_init_generate_mipmap(struct st_context *st)
63{
64   st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context);
65}
66
67
68void
69st_destroy_generate_mipmap(struct st_context *st)
70{
71   util_destroy_gen_mipmap(st->gen_mipmap);
72   st->gen_mipmap = NULL;
73}
74
75
76/**
77 * Generate mipmap levels using hardware rendering.
78 * \return TRUE if successful, FALSE if not possible
79 */
80static boolean
81st_render_mipmap(struct st_context *st,
82                 GLenum target,
83                 struct pipe_texture *pt,
84                 uint baseLevel, uint lastLevel)
85{
86   struct pipe_context *pipe = st->pipe;
87   struct pipe_screen *screen = pipe->screen;
88   const uint face = _mesa_tex_target_to_face(target);
89
90   assert(target != GL_TEXTURE_3D); /* not done yet */
91
92   /* check if we can render in the texture's format */
93   if (!screen->is_format_supported(screen, pt->format, pt->target,
94                                    PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {
95      return FALSE;
96   }
97
98   util_gen_mipmap(st->gen_mipmap, pt, face, baseLevel, lastLevel,
99                   PIPE_TEX_FILTER_LINEAR);
100
101   return TRUE;
102}
103
104
105static void
106fallback_generate_mipmap(GLcontext *ctx, GLenum target,
107                         struct gl_texture_object *texObj)
108{
109   struct pipe_context *pipe = ctx->st->pipe;
110   struct pipe_screen *screen = pipe->screen;
111   struct pipe_texture *pt = st_get_texobj_texture(texObj);
112   const uint baseLevel = texObj->BaseLevel;
113   const uint lastLevel = pt->last_level;
114   const uint face = _mesa_tex_target_to_face(target), zslice = 0;
115   uint dstLevel;
116   GLenum datatype;
117   GLuint comps;
118
119   if (ST_DEBUG & DEBUG_FALLBACK)
120      debug_printf("%s: fallback processing\n", __FUNCTION__);
121
122   assert(target != GL_TEXTURE_3D); /* not done yet */
123
124   _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
125                                  &datatype, &comps);
126
127   for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
128      const uint srcLevel = dstLevel - 1;
129      struct pipe_transfer *srcTrans, *dstTrans;
130      const ubyte *srcData;
131      ubyte *dstData;
132      int srcStride, dstStride;
133
134      srcTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
135						srcLevel, zslice,
136						PIPE_TRANSFER_READ, 0, 0,
137						u_minify(pt->width0, srcLevel),
138						u_minify(pt->height0, srcLevel));
139
140      dstTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
141						dstLevel, zslice,
142						PIPE_TRANSFER_WRITE, 0, 0,
143						u_minify(pt->width0, dstLevel),
144						u_minify(pt->height0, dstLevel));
145
146      srcData = (ubyte *) screen->transfer_map(screen, srcTrans);
147      dstData = (ubyte *) screen->transfer_map(screen, dstTrans);
148
149      srcStride = srcTrans->stride / pf_get_blocksize(srcTrans->texture->format);
150      dstStride = dstTrans->stride / pf_get_blocksize(dstTrans->texture->format);
151
152      _mesa_generate_mipmap_level(target, datatype, comps,
153                                  0 /*border*/,
154                                  u_minify(pt->width0, srcLevel),
155                                  u_minify(pt->height0, srcLevel),
156                                  u_minify(pt->depth0, srcLevel),
157                                  srcData,
158                                  srcStride, /* stride in texels */
159                                  u_minify(pt->width0, dstLevel),
160                                  u_minify(pt->height0, dstLevel),
161                                  u_minify(pt->depth0, dstLevel),
162                                  dstData,
163                                  dstStride); /* stride in texels */
164
165      screen->transfer_unmap(screen, srcTrans);
166      screen->transfer_unmap(screen, dstTrans);
167
168      screen->tex_transfer_destroy(srcTrans);
169      screen->tex_transfer_destroy(dstTrans);
170   }
171}
172
173
174/**
175 * Compute the expected number of mipmap levels in the texture given
176 * the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/
177 * GL_TEXTURE_MAX_LEVEL settings.  This will tell us how many mipmap
178 * level should be generated.
179 */
180static GLuint
181compute_num_levels(GLcontext *ctx,
182                   struct gl_texture_object *texObj,
183                   GLenum target)
184{
185   if (target == GL_TEXTURE_RECTANGLE_ARB) {
186      return 1;
187   }
188   else {
189      const GLuint maxLevels = texObj->MaxLevel - texObj->BaseLevel + 1;
190      const struct gl_texture_image *baseImage =
191         _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel);
192      GLuint size, numLevels;
193
194      size = MAX2(baseImage->Width2, baseImage->Height2);
195      size = MAX2(size, baseImage->Depth2);
196
197      numLevels = 0;
198
199      while (size > 0) {
200         numLevels++;
201         size >>= 1;
202      }
203
204      numLevels = MIN2(numLevels, maxLevels);
205
206      return numLevels;
207   }
208}
209
210
211void
212st_generate_mipmap(GLcontext *ctx, GLenum target,
213                   struct gl_texture_object *texObj)
214{
215   struct st_context *st = ctx->st;
216   struct pipe_texture *pt = st_get_texobj_texture(texObj);
217   const uint baseLevel = texObj->BaseLevel;
218   uint lastLevel;
219   uint dstLevel;
220
221   if (!pt)
222      return;
223
224   /* find expected last mipmap level */
225   lastLevel = compute_num_levels(ctx, texObj, target) - 1;
226
227   if (pt->last_level < lastLevel) {
228      /* The current gallium texture doesn't have space for all the
229       * mipmap levels we need to generate.  So allocate a new texture.
230       */
231      struct st_texture_object *stObj = st_texture_object(texObj);
232      struct pipe_texture *oldTex = stObj->pt;
233      GLboolean needFlush;
234
235      /* create new texture with space for more levels */
236      stObj->pt = st_texture_create(st,
237                                    oldTex->target,
238                                    oldTex->format,
239                                    lastLevel,
240                                    oldTex->width0,
241                                    oldTex->height0,
242                                    oldTex->depth0,
243                                    oldTex->tex_usage);
244
245      /* The texture isn't in a "complete" state yet so set the expected
246       * lastLevel here, since it won't get done in st_finalize_texture().
247       */
248      stObj->lastLevel = lastLevel;
249
250      /* This will copy the old texture's base image into the new texture
251       * which we just allocated.
252       */
253      st_finalize_texture(ctx, st->pipe, texObj, &needFlush);
254
255      /* release the old tex (will likely be freed too) */
256      pipe_texture_reference(&oldTex, NULL);
257
258      pt = stObj->pt;
259   }
260
261   assert(lastLevel <= pt->last_level);
262
263   /* Recall that the Mesa BaseLevel image is stored in the gallium
264    * texture's level[0] position.  So pass baseLevel=0 here.
265    */
266   if (!st_render_mipmap(st, target, pt, 0, lastLevel)) {
267      fallback_generate_mipmap(ctx, target, texObj);
268   }
269
270   /* Fill in the Mesa gl_texture_image fields */
271   for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
272      const uint srcLevel = dstLevel - 1;
273      const struct gl_texture_image *srcImage
274         = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
275      struct gl_texture_image *dstImage;
276      struct st_texture_image *stImage;
277      uint dstWidth = u_minify(pt->width0, dstLevel);
278      uint dstHeight = u_minify(pt->height0, dstLevel);
279      uint dstDepth = u_minify(pt->depth0, dstLevel);
280      uint border = srcImage->Border;
281
282      dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
283      if (!dstImage) {
284         _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
285         return;
286      }
287
288      /* Free old image data */
289      if (dstImage->Data)
290         ctx->Driver.FreeTexImageData(ctx, dstImage);
291
292      /* initialize new image */
293      _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
294                                 dstDepth, border, srcImage->InternalFormat);
295
296      dstImage->TexFormat = srcImage->TexFormat;
297
298      stImage = (struct st_texture_image *) dstImage;
299      pipe_texture_reference(&stImage->pt, pt);
300   }
301}
302