st_gen_mipmap.c revision c7510ddc3f6faa68154c11ce820097492a0748d2 
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/mipmap.h"
31#include "main/teximage.h"
32#include "main/texformat.h"
33
34#include "shader/prog_instruction.h"
35
36#include "pipe/p_context.h"
37#include "pipe/p_defines.h"
38#include "pipe/p_inlines.h"
39#include "util/u_gen_mipmap.h"
40
41#include "cso_cache/cso_cache.h"
42#include "cso_cache/cso_context.h"
43
44#include "st_context.h"
45#include "st_draw.h"
46#include "st_gen_mipmap.h"
47#include "st_program.h"
48#include "st_texture.h"
49#include "st_cb_texture.h"
50
51
52/**
53 * one-time init for generate mipmap
54 * XXX Note: there may be other times we need no-op/simple state like this.
55 * In that case, some code refactoring would be good.
56 */
57void
58st_init_generate_mipmap(struct st_context *st)
59{
60   st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context);
61}
62
63
64void
65st_destroy_generate_mipmap(struct st_context *st)
66{
67   util_destroy_gen_mipmap(st->gen_mipmap);
68   st->gen_mipmap = NULL;
69}
70
71
72/**
73 * Generate mipmap levels using hardware rendering.
74 * \return TRUE if successful, FALSE if not possible
75 */
76static boolean
77st_render_mipmap(struct st_context *st,
78                 GLenum target,
79                 struct pipe_texture *pt,
80                 uint baseLevel, uint lastLevel)
81{
82   struct pipe_context *pipe = st->pipe;
83   struct pipe_screen *screen = pipe->screen;
84   const uint face = _mesa_tex_target_to_face(target);
85
86   assert(target != GL_TEXTURE_3D); /* not done yet */
87
88   /* check if we can render in the texture's format */
89   if (!screen->is_format_supported(screen, pt->format, target,
90                                    PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {
91      return FALSE;
92   }
93
94   util_gen_mipmap(st->gen_mipmap, pt, face, baseLevel, lastLevel,
95                   PIPE_TEX_FILTER_LINEAR);
96
97   return TRUE;
98}
99
100
101static void
102fallback_generate_mipmap(GLcontext *ctx, GLenum target,
103                         struct gl_texture_object *texObj)
104{
105   struct pipe_context *pipe = ctx->st->pipe;
106   struct pipe_screen *screen = pipe->screen;
107   struct pipe_texture *pt = st_get_texobj_texture(texObj);
108   const uint baseLevel = texObj->BaseLevel;
109   const uint lastLevel = pt->last_level;
110   const uint face = _mesa_tex_target_to_face(target), zslice = 0;
111   uint dstLevel;
112   GLenum datatype;
113   GLuint comps;
114
115   assert(target != GL_TEXTURE_3D); /* not done yet */
116
117   _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
118                                  &datatype, &comps);
119
120   for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
121      const uint srcLevel = dstLevel - 1;
122      struct pipe_surface *srcSurf, *dstSurf;
123      const ubyte *srcData;
124      ubyte *dstData;
125
126      srcSurf = screen->get_tex_surface(screen, pt, face, srcLevel, zslice,
127                                        PIPE_BUFFER_USAGE_CPU_READ);
128      dstSurf = screen->get_tex_surface(screen, pt, face, dstLevel, zslice,
129                                        PIPE_BUFFER_USAGE_CPU_WRITE);
130
131      srcData = (ubyte *) pipe_buffer_map(pipe->screen, srcSurf->buffer,
132                                          PIPE_BUFFER_USAGE_CPU_READ)
133              + srcSurf->offset;
134      dstData = (ubyte *) pipe_buffer_map(pipe->screen, dstSurf->buffer,
135                                          PIPE_BUFFER_USAGE_CPU_WRITE)
136              + dstSurf->offset;
137
138      _mesa_generate_mipmap_level(target, datatype, comps,
139                   0 /*border*/,
140                   pt->width[srcLevel], pt->height[srcLevel], pt->depth[srcLevel],
141                   srcData,
142                   srcSurf->stride, /* stride in bytes */
143                   pt->width[dstLevel], pt->height[dstLevel], pt->depth[dstLevel],
144                   dstData,
145                   dstSurf->stride); /* stride in bytes */
146
147      pipe_buffer_unmap(pipe->screen, srcSurf->buffer);
148      pipe_buffer_unmap(pipe->screen, dstSurf->buffer);
149
150      pipe_surface_reference(&srcSurf, NULL);
151      pipe_surface_reference(&dstSurf, NULL);
152   }
153}
154
155
156void
157st_generate_mipmap(GLcontext *ctx, GLenum target,
158                   struct gl_texture_object *texObj)
159{
160   struct st_context *st = ctx->st;
161   struct pipe_texture *pt = st_get_texobj_texture(texObj);
162   const uint baseLevel = texObj->BaseLevel;
163   const uint lastLevel = pt->last_level;
164   uint dstLevel;
165
166   if (!st_render_mipmap(st, target, pt, baseLevel, lastLevel)) {
167      fallback_generate_mipmap(ctx, target, texObj);
168   }
169
170   /* Fill in the Mesa gl_texture_image fields */
171   for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
172      const uint srcLevel = dstLevel - 1;
173      const struct gl_texture_image *srcImage
174         = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
175      struct gl_texture_image *dstImage;
176      struct st_texture_image *stImage;
177      uint dstWidth = pt->width[dstLevel];
178      uint dstHeight = pt->height[dstLevel];
179      uint dstDepth = pt->depth[dstLevel];
180      uint border = srcImage->Border;
181
182      dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
183      if (!dstImage) {
184         _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
185         return;
186      }
187
188      if (dstImage->ImageOffsets)
189         _mesa_free(dstImage->ImageOffsets);
190
191      /* Free old image data */
192      if (dstImage->Data)
193         ctx->Driver.FreeTexImageData(ctx, dstImage);
194
195      /* initialize new image */
196      _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
197                                 dstDepth, border, srcImage->InternalFormat);
198
199      dstImage->TexFormat = srcImage->TexFormat;
200
201      stImage = (struct st_texture_image *) dstImage;
202      pipe_texture_reference(&stImage->pt, pt);
203   }
204}
205