intel_tex_validate.c revision fb6bff3712d71cfe131fbf70154d326cdf39e7c8 
1#include "main/mtypes.h"
2#include "main/macros.h"
3
4#include "intel_context.h"
5#include "intel_mipmap_tree.h"
6#include "intel_tex.h"
7
8#define FILE_DEBUG_FLAG DEBUG_TEXTURE
9
10/**
11 * Compute which mipmap levels that really need to be sent to the hardware.
12 * This depends on the base image size, GL_TEXTURE_MIN_LOD,
13 * GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, and GL_TEXTURE_MAX_LEVEL.
14 */
15static void
16intel_calculate_first_last_level(struct intel_context *intel,
17				 struct intel_texture_object *intelObj)
18{
19   struct gl_texture_object *tObj = &intelObj->base;
20   const struct gl_texture_image *const baseImage =
21      tObj->Image[0][tObj->BaseLevel];
22
23   /* These must be signed values.  MinLod and MaxLod can be negative numbers,
24    * and having firstLevel and lastLevel as signed prevents the need for
25    * extra sign checks.
26    */
27   int firstLevel;
28   int lastLevel;
29
30   /* Yes, this looks overly complicated, but it's all needed.
31    */
32   switch (tObj->Target) {
33   case GL_TEXTURE_1D:
34   case GL_TEXTURE_2D:
35   case GL_TEXTURE_3D:
36   case GL_TEXTURE_CUBE_MAP:
37      if (tObj->MinFilter == GL_NEAREST || tObj->MinFilter == GL_LINEAR) {
38         /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
39          */
40         firstLevel = lastLevel = tObj->BaseLevel;
41      }
42      else {
43	 if (intel->gen == 2) {
44	    firstLevel = tObj->BaseLevel + (GLint) (tObj->MinLod + 0.5);
45	    firstLevel = MAX2(firstLevel, tObj->BaseLevel);
46	    firstLevel = MIN2(firstLevel, tObj->BaseLevel + baseImage->MaxLog2);
47	    lastLevel = tObj->BaseLevel + (GLint) (tObj->MaxLod + 0.5);
48	    lastLevel = MAX2(lastLevel, tObj->BaseLevel);
49	    lastLevel = MIN2(lastLevel, tObj->BaseLevel + baseImage->MaxLog2);
50	    lastLevel = MIN2(lastLevel, tObj->MaxLevel);
51	    lastLevel = MAX2(firstLevel, lastLevel);       /* need at least one level */
52	 } else {
53	    /* Min/max LOD are taken into account in sampler state.  We don't
54	     * want to re-layout textures just because clamping has been applied
55	     * since it means a bunch of blitting around and probably no memory
56	     * savings (since we have to keep the other levels around anyway).
57	     */
58	    firstLevel = tObj->BaseLevel;
59	    lastLevel = MIN2(tObj->BaseLevel + baseImage->MaxLog2,
60			     tObj->MaxLevel);
61	    /* need at least one level */
62	    lastLevel = MAX2(firstLevel, lastLevel);
63	 }
64      }
65      break;
66   case GL_TEXTURE_RECTANGLE_NV:
67   case GL_TEXTURE_4D_SGIS:
68      firstLevel = lastLevel = 0;
69      break;
70   default:
71      return;
72   }
73
74   /* save these values */
75   intelObj->firstLevel = firstLevel;
76   intelObj->lastLevel = lastLevel;
77}
78
79/**
80 * Copies the image's contents at its level into the object's miptree,
81 * and updates the image to point at the object's miptree.
82 */
83static void
84copy_image_data_to_tree(struct intel_context *intel,
85                        struct intel_texture_object *intelObj,
86                        struct intel_texture_image *intelImage)
87{
88   if (intelImage->mt) {
89      /* Copy potentially with the blitter:
90       */
91      intel_miptree_image_copy(intel,
92                               intelObj->mt,
93                               intelImage->face,
94                               intelImage->level, intelImage->mt);
95
96      intel_miptree_release(intel, &intelImage->mt);
97   }
98   else {
99      assert(intelImage->base.Data != NULL);
100
101      /* More straightforward upload.
102       */
103      intel_miptree_image_data(intel,
104                               intelObj->mt,
105                               intelImage->face,
106                               intelImage->level,
107                               intelImage->base.Data,
108                               intelImage->base.RowStride,
109                               intelImage->base.RowStride *
110                               intelImage->base.Height);
111      _mesa_align_free(intelImage->base.Data);
112      intelImage->base.Data = NULL;
113   }
114
115   intel_miptree_reference(&intelImage->mt, intelObj->mt);
116}
117
118
119/*
120 */
121GLuint
122intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
123{
124   struct gl_texture_object *tObj = intel->ctx.Texture.Unit[unit]._Current;
125   struct intel_texture_object *intelObj = intel_texture_object(tObj);
126   int comp_byte = 0;
127   int cpp;
128   GLuint face, i;
129   GLuint nr_faces = 0;
130   struct intel_texture_image *firstImage;
131
132   /* We know/require this is true by now:
133    */
134   assert(intelObj->base._Complete);
135
136   /* What levels must the tree include at a minimum?
137    */
138   intel_calculate_first_last_level(intel, intelObj);
139   firstImage = intel_texture_image(tObj->Image[0][intelObj->firstLevel]);
140
141   /* Fallback case:
142    */
143   if (firstImage->base.Border) {
144      if (intelObj->mt) {
145         intel_miptree_release(intel, &intelObj->mt);
146      }
147      return GL_FALSE;
148   }
149
150
151   /* If both firstImage and intelObj have a tree which can contain
152    * all active images, favour firstImage.  Note that because of the
153    * completeness requirement, we know that the image dimensions
154    * will match.
155    */
156   if (firstImage->mt &&
157       firstImage->mt != intelObj->mt &&
158       firstImage->mt->first_level <= intelObj->firstLevel &&
159       firstImage->mt->last_level >= intelObj->lastLevel) {
160
161      if (intelObj->mt)
162         intel_miptree_release(intel, &intelObj->mt);
163
164      intel_miptree_reference(&intelObj->mt, firstImage->mt);
165   }
166
167   if (_mesa_is_format_compressed(firstImage->base.TexFormat)) {
168      comp_byte = intel_compressed_num_bytes(firstImage->base.TexFormat);
169      cpp = comp_byte;
170   }
171   else
172      cpp = _mesa_get_format_bytes(firstImage->base.TexFormat);
173
174   /* Check tree can hold all active levels.  Check tree matches
175    * target, imageFormat, etc.
176    *
177    * XXX: For some layouts (eg i945?), the test might have to be
178    * first_level == firstLevel, as the tree isn't valid except at the
179    * original start level.  Hope to get around this by
180    * programming minLod, maxLod, baseLevel into the hardware and
181    * leaving the tree alone.
182    */
183   if (intelObj->mt &&
184       (intelObj->mt->target != intelObj->base.Target ||
185	intelObj->mt->internal_format != firstImage->base.InternalFormat ||
186	intelObj->mt->first_level != intelObj->firstLevel ||
187	intelObj->mt->last_level != intelObj->lastLevel ||
188	intelObj->mt->width0 != firstImage->base.Width ||
189	intelObj->mt->height0 != firstImage->base.Height ||
190	intelObj->mt->depth0 != firstImage->base.Depth ||
191	intelObj->mt->cpp != cpp ||
192	intelObj->mt->compressed != _mesa_is_format_compressed(firstImage->base.TexFormat))) {
193      intel_miptree_release(intel, &intelObj->mt);
194   }
195
196
197   /* May need to create a new tree:
198    */
199   if (!intelObj->mt) {
200      intelObj->mt = intel_miptree_create(intel,
201                                          intelObj->base.Target,
202                                          firstImage->base._BaseFormat,
203                                          firstImage->base.InternalFormat,
204                                          intelObj->firstLevel,
205                                          intelObj->lastLevel,
206                                          firstImage->base.Width,
207                                          firstImage->base.Height,
208                                          firstImage->base.Depth,
209                                          cpp,
210                                          comp_byte,
211					  GL_TRUE);
212   }
213
214   /* Pull in any images not in the object's tree:
215    */
216   nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
217   for (face = 0; face < nr_faces; face++) {
218      for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++) {
219         struct intel_texture_image *intelImage =
220            intel_texture_image(intelObj->base.Image[face][i]);
221
222         /* Need to import images in main memory or held in other trees.
223	  * If it's a render target, then its data isn't needed to be in
224	  * the object tree (otherwise we'd be FBO incomplete), and we need
225	  * to keep track of the image's MT as needing to be pulled in still,
226	  * or we'll lose the rendering that's done to it.
227          */
228         if (intelObj->mt != intelImage->mt &&
229	     !intelImage->used_as_render_target) {
230            copy_image_data_to_tree(intel, intelObj, intelImage);
231         }
232      }
233   }
234
235   return GL_TRUE;
236}
237
238void
239intel_tex_map_level_images(struct intel_context *intel,
240			   struct intel_texture_object *intelObj,
241			   int level)
242{
243   GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
244   GLuint face;
245
246   for (face = 0; face < nr_faces; face++) {
247      struct intel_texture_image *intelImage =
248	 intel_texture_image(intelObj->base.Image[face][level]);
249
250      if (intelImage && intelImage->mt) {
251	 intelImage->base.Data =
252	    intel_miptree_image_map(intel,
253				    intelImage->mt,
254				    intelImage->face,
255				    intelImage->level,
256				    &intelImage->base.RowStride,
257				    intelImage->base.ImageOffsets);
258	 /* convert stride to texels, not bytes */
259	 intelImage->base.RowStride /= intelImage->mt->cpp;
260	 /* intelImage->base.ImageStride /= intelImage->mt->cpp; */
261      }
262   }
263}
264
265void
266intel_tex_unmap_level_images(struct intel_context *intel,
267			     struct intel_texture_object *intelObj,
268			     int level)
269{
270   GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
271   GLuint face;
272
273   for (face = 0; face < nr_faces; face++) {
274      struct intel_texture_image *intelImage =
275	 intel_texture_image(intelObj->base.Image[face][level]);
276
277      if (intelImage && intelImage->mt) {
278	 intel_miptree_image_unmap(intel, intelImage->mt);
279	 intelImage->base.Data = NULL;
280      }
281   }
282}
283
284void
285intel_tex_map_images(struct intel_context *intel,
286                     struct intel_texture_object *intelObj)
287{
288   int i;
289
290   DBG("%s\n", __FUNCTION__);
291
292   for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++)
293      intel_tex_map_level_images(intel, intelObj, i);
294}
295
296void
297intel_tex_unmap_images(struct intel_context *intel,
298                       struct intel_texture_object *intelObj)
299{
300   int i;
301
302   for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++)
303      intel_tex_unmap_level_images(intel, intelObj, i);
304}
305