intel_mipmap_tree.c revision 7c71ef3a3d0cf2620525f468960cdc76a0fb0d33 
1/**************************************************************************
2 *
3 * Copyright 2006 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#include "intel_context.h"
29#include "intel_mipmap_tree.h"
30#include "intel_regions.h"
31#include "enums.h"
32
33#define FILE_DEBUG_FLAG DEBUG_MIPTREE
34
35static GLenum
36target_to_target(GLenum target)
37{
38   switch (target) {
39   case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
40   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
41   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
42   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
43   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
44   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
45      return GL_TEXTURE_CUBE_MAP_ARB;
46   default:
47      return target;
48   }
49}
50
51struct intel_mipmap_tree *
52intel_miptree_create(struct intel_context *intel,
53                     GLenum target,
54                     GLenum internal_format,
55                     GLuint first_level,
56                     GLuint last_level,
57                     GLuint width0,
58                     GLuint height0,
59                     GLuint depth0, GLuint cpp, GLuint compress_byte)
60{
61   GLboolean ok;
62   struct intel_mipmap_tree *mt = calloc(sizeof(*mt), 1);
63
64   DBG("%s target %s format %s level %d..%d\n", __FUNCTION__,
65       _mesa_lookup_enum_by_nr(target),
66       _mesa_lookup_enum_by_nr(internal_format), first_level, last_level);
67
68   mt->target = target_to_target(target);
69   mt->internal_format = internal_format;
70   mt->first_level = first_level;
71   mt->last_level = last_level;
72   mt->width0 = width0;
73   mt->height0 = height0;
74   mt->depth0 = depth0;
75   mt->cpp = compress_byte ? compress_byte : cpp;
76   mt->compressed = compress_byte ? 1 : 0;
77   mt->refcount = 1;
78
79   switch (intel->intelScreen->deviceID) {
80   case PCI_CHIP_I945_G:
81   case PCI_CHIP_I945_GM:
82   case PCI_CHIP_I945_GME:
83   case PCI_CHIP_G33_G:
84   case PCI_CHIP_Q33_G:
85   case PCI_CHIP_Q35_G:
86      ok = i945_miptree_layout(mt);
87      break;
88   case PCI_CHIP_I915_G:
89   case PCI_CHIP_I915_GM:
90   case PCI_CHIP_I830_M:
91   case PCI_CHIP_I855_GM:
92   case PCI_CHIP_I865_G:
93   default:
94      /* All the i830 chips and the i915 use this layout:
95       */
96      ok = i915_miptree_layout(mt);
97      break;
98   }
99
100   if (ok) {
101      if (!mt->compressed) {
102	 int align;
103
104	 if (intel->ttm) {
105	    /* XXX: Align pitch to multiple of 64 bytes for now to allow
106	     * render-to-texture to work in all cases. This should probably be
107	     * replaced at some point by some scheme to only do this when really
108	     * necessary.
109	     */
110	    align = 63;
111	 } else {
112	    align = 3;
113	 }
114
115	 mt->pitch = (mt->pitch * cpp + align) & ~align;
116
117	 /* XXX: At least the i915 seems very upset when the pitch is a multiple
118	  * of 1024 and sometimes 512 bytes - performance can drop by several
119	  * times. Go to the next multiple of the required alignment for now.
120	  */
121	 if (!(mt->pitch & 511))
122	    mt->pitch += align + 1;
123
124	 mt->pitch /= cpp;
125      }
126
127      mt->region = intel_region_alloc(intel,
128                                      mt->cpp, mt->pitch, mt->total_height);
129   }
130
131   if (!mt->region) {
132      free(mt);
133      return NULL;
134   }
135
136   return mt;
137}
138
139
140void
141intel_miptree_reference(struct intel_mipmap_tree **dst,
142                        struct intel_mipmap_tree *src)
143{
144   src->refcount++;
145   *dst = src;
146   DBG("%s %p refcount now %d\n", __FUNCTION__, src, src->refcount);
147}
148
149void
150intel_miptree_release(struct intel_context *intel,
151                      struct intel_mipmap_tree **mt)
152{
153   if (!*mt)
154      return;
155
156   DBG("%s %p refcount will be %d\n", __FUNCTION__, *mt, (*mt)->refcount - 1);
157   if (--(*mt)->refcount <= 0) {
158      GLuint i;
159
160      DBG("%s deleting %p\n", __FUNCTION__, *mt);
161
162      intel_region_release(&((*mt)->region));
163
164      for (i = 0; i < MAX_TEXTURE_LEVELS; i++)
165         if ((*mt)->level[i].image_offset)
166            free((*mt)->level[i].image_offset);
167
168      free(*mt);
169   }
170   *mt = NULL;
171}
172
173
174
175
176/* Can the image be pulled into a unified mipmap tree.  This mirrors
177 * the completeness test in a lot of ways.
178 *
179 * Not sure whether I want to pass gl_texture_image here.
180 */
181GLboolean
182intel_miptree_match_image(struct intel_mipmap_tree *mt,
183                          struct gl_texture_image *image,
184                          GLuint face, GLuint level)
185{
186   /* Images with borders are never pulled into mipmap trees.
187    */
188   if (image->Border)
189      return GL_FALSE;
190
191   if (image->InternalFormat != mt->internal_format ||
192       image->IsCompressed != mt->compressed)
193      return GL_FALSE;
194
195   /* Test image dimensions against the base level image adjusted for
196    * minification.  This will also catch images not present in the
197    * tree, changed targets, etc.
198    */
199   if (image->Width != mt->level[level].width ||
200       image->Height != mt->level[level].height ||
201       image->Depth != mt->level[level].depth)
202      return GL_FALSE;
203
204   return GL_TRUE;
205}
206
207
208void
209intel_miptree_set_level_info(struct intel_mipmap_tree *mt,
210                             GLuint level,
211                             GLuint nr_images,
212                             GLuint x, GLuint y, GLuint w, GLuint h, GLuint d)
213{
214
215   mt->level[level].width = w;
216   mt->level[level].height = h;
217   mt->level[level].depth = d;
218   mt->level[level].level_offset = (x + y * mt->pitch) * mt->cpp;
219   mt->level[level].nr_images = nr_images;
220
221   DBG("%s level %d size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
222       level, w, h, d, x, y, mt->level[level].level_offset);
223
224   /* Not sure when this would happen, but anyway:
225    */
226   if (mt->level[level].image_offset) {
227      free(mt->level[level].image_offset);
228      mt->level[level].image_offset = NULL;
229   }
230
231   assert(nr_images);
232
233   mt->level[level].image_offset = malloc(nr_images * sizeof(GLuint));
234   mt->level[level].image_offset[0] = 0;
235}
236
237
238
239void
240intel_miptree_set_image_offset(struct intel_mipmap_tree *mt,
241                               GLuint level, GLuint img, GLuint x, GLuint y)
242{
243   if (img == 0 && level == 0)
244      assert(x == 0 && y == 0);
245
246   assert(img < mt->level[level].nr_images);
247
248   mt->level[level].image_offset[img] = (x + y * mt->pitch);
249
250   DBG("%s level %d img %d pos %d,%d image_offset %x\n",
251       __FUNCTION__, level, img, x, y, mt->level[level].image_offset[img]);
252}
253
254
255/* Although we use the image_offset[] array to store relative offsets
256 * to cube faces, Mesa doesn't know anything about this and expects
257 * each cube face to be treated as a separate image.
258 *
259 * These functions present that view to mesa:
260 */
261const GLuint *
262intel_miptree_depth_offsets(struct intel_mipmap_tree *mt, GLuint level)
263{
264   static const GLuint zero = 0;
265
266   if (mt->target != GL_TEXTURE_3D || mt->level[level].nr_images == 1)
267      return &zero;
268   else
269      return mt->level[level].image_offset;
270}
271
272
273GLuint
274intel_miptree_image_offset(struct intel_mipmap_tree * mt,
275                           GLuint face, GLuint level)
276{
277   if (mt->target == GL_TEXTURE_CUBE_MAP_ARB)
278      return (mt->level[level].level_offset +
279              mt->level[level].image_offset[face] * mt->cpp);
280   else
281      return mt->level[level].level_offset;
282}
283
284
285
286/**
287 * Map a teximage in a mipmap tree.
288 * \param row_stride  returns row stride in bytes
289 * \param image_stride  returns image stride in bytes (for 3D textures).
290 * \return address of mapping
291 */
292GLubyte *
293intel_miptree_image_map(struct intel_context * intel,
294                        struct intel_mipmap_tree * mt,
295                        GLuint face,
296                        GLuint level,
297                        GLuint * row_stride, GLuint * image_offsets)
298{
299   DBG("%s \n", __FUNCTION__);
300
301   if (row_stride)
302      *row_stride = mt->pitch * mt->cpp;
303
304   if (image_offsets)
305      memcpy(image_offsets, mt->level[level].image_offset,
306             mt->level[level].depth * sizeof(GLuint));
307
308   return (intel_region_map(intel, mt->region) +
309           intel_miptree_image_offset(mt, face, level));
310}
311
312void
313intel_miptree_image_unmap(struct intel_context *intel,
314                          struct intel_mipmap_tree *mt)
315{
316   DBG("%s\n", __FUNCTION__);
317   intel_region_unmap(intel, mt->region);
318}
319
320
321
322/* Upload data for a particular image.
323 */
324void
325intel_miptree_image_data(struct intel_context *intel,
326                         struct intel_mipmap_tree *dst,
327                         GLuint face,
328                         GLuint level,
329                         void *src,
330                         GLuint src_row_pitch, GLuint src_image_pitch)
331{
332   GLuint depth = dst->level[level].depth;
333   GLuint dst_offset = intel_miptree_image_offset(dst, face, level);
334   const GLuint *dst_depth_offset = intel_miptree_depth_offsets(dst, level);
335   GLuint i;
336   GLuint height = 0;
337
338   DBG("%s\n", __FUNCTION__);
339   for (i = 0; i < depth; i++) {
340      height = dst->level[level].height;
341      if(dst->compressed)
342	 height /= 4;
343      intel_region_data(intel, dst->region,
344                        dst_offset + dst_depth_offset[i], /* dst_offset */
345                        0, 0,                             /* dstx, dsty */
346                        src,
347                        src_row_pitch,
348                        0, 0,                             /* source x, y */
349                        dst->level[level].width, height); /* width, height */
350
351      src += src_image_pitch * dst->cpp;
352   }
353}
354
355extern GLuint intel_compressed_alignment(GLenum);
356/* Copy mipmap image between trees
357 */
358void
359intel_miptree_image_copy(struct intel_context *intel,
360                         struct intel_mipmap_tree *dst,
361                         GLuint face, GLuint level,
362                         struct intel_mipmap_tree *src)
363{
364   GLuint width = src->level[level].width;
365   GLuint height = src->level[level].height;
366   GLuint depth = src->level[level].depth;
367   GLuint dst_offset = intel_miptree_image_offset(dst, face, level);
368   GLuint src_offset = intel_miptree_image_offset(src, face, level);
369   const GLuint *dst_depth_offset = intel_miptree_depth_offsets(dst, level);
370   const GLuint *src_depth_offset = intel_miptree_depth_offsets(src, level);
371   GLuint i;
372
373   if (dst->compressed) {
374       GLuint alignment = intel_compressed_alignment(dst->internal_format);
375       height = (height + 3) / 4;
376       width = ((width + alignment - 1) & ~(alignment - 1));
377   }
378
379   for (i = 0; i < depth; i++) {
380      intel_region_copy(intel,
381                        dst->region, dst_offset + dst_depth_offset[i],
382                        0,
383                        0,
384                        src->region, src_offset + src_depth_offset[i],
385                        0, 0, width, height);
386   }
387
388}
389