st_gen_mipmap.c revision 9b75627fab5bf2ea90f27ddd31b60c54895f6de6 
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_transfer *srcTrans, *dstTrans;
123      const ubyte *srcData;
124      ubyte *dstData;
125
126      st_teximage_flush_before_map(ctx->st, pt, face, srcLevel,
127				   PIPE_TRANSFER_READ);
128
129      srcTrans = screen->get_tex_transfer(screen, pt, face, srcLevel, zslice,
130                                          PIPE_TRANSFER_READ, 0, 0,
131                                          pt->width[srcLevel],
132                                          pt->height[srcLevel]);
133
134      st_teximage_flush_before_map(ctx->st, pt, face, dstLevel,
135				   PIPE_TRANSFER_WRITE);
136
137      dstTrans = screen->get_tex_transfer(screen, pt, face, dstLevel, zslice,
138                                          PIPE_TRANSFER_WRITE, 0, 0,
139                                          pt->width[dstLevel],
140                                          pt->height[dstLevel]);
141
142      srcData = (ubyte *) screen->transfer_map(screen, srcTrans);
143      dstData = (ubyte *) screen->transfer_map(screen, dstTrans);
144
145      _mesa_generate_mipmap_level(target, datatype, comps,
146                   0 /*border*/,
147                   pt->width[srcLevel], pt->height[srcLevel], pt->depth[srcLevel],
148                   srcData,
149                   srcTrans->stride, /* stride in bytes */
150                   pt->width[dstLevel], pt->height[dstLevel], pt->depth[dstLevel],
151                   dstData,
152                   dstTrans->stride); /* stride in bytes */
153
154      screen->transfer_unmap(screen, srcTrans);
155      screen->transfer_unmap(screen, dstTrans);
156
157      screen->tex_transfer_destroy(srcTrans);
158      screen->tex_transfer_destroy(dstTrans);
159   }
160}
161
162
163void
164st_generate_mipmap(GLcontext *ctx, GLenum target,
165                   struct gl_texture_object *texObj)
166{
167   struct st_context *st = ctx->st;
168   struct pipe_texture *pt = st_get_texobj_texture(texObj);
169   const uint baseLevel = texObj->BaseLevel;
170   uint lastLevel;
171   uint dstLevel;
172
173   if (!pt)
174      return;
175
176   lastLevel = pt->last_level;
177
178   if (!st_render_mipmap(st, target, pt, baseLevel, lastLevel)) {
179      fallback_generate_mipmap(ctx, target, texObj);
180   }
181
182   /* Fill in the Mesa gl_texture_image fields */
183   for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
184      const uint srcLevel = dstLevel - 1;
185      const struct gl_texture_image *srcImage
186         = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
187      struct gl_texture_image *dstImage;
188      struct st_texture_image *stImage;
189      uint dstWidth = pt->width[dstLevel];
190      uint dstHeight = pt->height[dstLevel];
191      uint dstDepth = pt->depth[dstLevel];
192      uint border = srcImage->Border;
193
194      dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
195      if (!dstImage) {
196         _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
197         return;
198      }
199
200      if (dstImage->ImageOffsets)
201         _mesa_free(dstImage->ImageOffsets);
202
203      /* Free old image data */
204      if (dstImage->Data)
205         ctx->Driver.FreeTexImageData(ctx, dstImage);
206
207      /* initialize new image */
208      _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
209                                 dstDepth, border, srcImage->InternalFormat);
210
211      dstImage->TexFormat = srcImage->TexFormat;
212
213      stImage = (struct st_texture_image *) dstImage;
214      pipe_texture_reference(&stImage->pt, pt);
215   }
216}
217