intel_tex_validate.c revision e2ee0c55d360f6b0bb8cd140b6dd6c0f46998ab1 
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      firstLevel = lastLevel = 0;
68      break;
69   default:
70      return;
71   }
72
73   /* save these values */
74   intelObj->firstLevel = firstLevel;
75   intelObj->lastLevel = lastLevel;
76}
77
78/**
79 * Copies the image's contents at its level into the object's miptree,
80 * and updates the image to point at the object's miptree.
81 */
82static void
83copy_image_data_to_tree(struct intel_context *intel,
84                        struct intel_texture_object *intelObj,
85                        struct intel_texture_image *intelImage)
86{
87   if (intelImage->mt) {
88      /* Copy potentially with the blitter:
89       */
90      intel_miptree_image_copy(intel,
91                               intelObj->mt,
92                               intelImage->face,
93                               intelImage->level, intelImage->mt);
94
95      intel_miptree_release(intel, &intelImage->mt);
96   }
97   else {
98      assert(intelImage->base.Data != NULL);
99
100      /* More straightforward upload.
101       */
102      intel_miptree_image_data(intel,
103                               intelObj->mt,
104                               intelImage->face,
105                               intelImage->level,
106                               intelImage->base.Data,
107                               intelImage->base.RowStride,
108                               intelImage->base.RowStride *
109                               intelImage->base.Height);
110      _mesa_align_free(intelImage->base.Data);
111      intelImage->base.Data = NULL;
112   }
113
114   intel_miptree_reference(&intelImage->mt, intelObj->mt);
115}
116
117
118/*
119 */
120GLuint
121intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
122{
123   struct gl_texture_object *tObj = intel->ctx.Texture.Unit[unit]._Current;
124   struct intel_texture_object *intelObj = intel_texture_object(tObj);
125   int comp_byte = 0;
126   int cpp;
127   GLuint face, i;
128   GLuint nr_faces = 0;
129   struct intel_texture_image *firstImage;
130
131   /* We know/require this is true by now:
132    */
133   assert(intelObj->base._Complete);
134
135   /* What levels must the tree include at a minimum?
136    */
137   intel_calculate_first_last_level(intel, intelObj);
138   firstImage = intel_texture_image(tObj->Image[0][intelObj->firstLevel]);
139
140   /* Fallback case:
141    */
142   if (firstImage->base.Border) {
143      if (intelObj->mt) {
144         intel_miptree_release(intel, &intelObj->mt);
145      }
146      return GL_FALSE;
147   }
148
149
150   /* If both firstImage and intelObj have a tree which can contain
151    * all active images, favour firstImage.  Note that because of the
152    * completeness requirement, we know that the image dimensions
153    * will match.
154    */
155   if (firstImage->mt &&
156       firstImage->mt != intelObj->mt &&
157       firstImage->mt->first_level <= intelObj->firstLevel &&
158       firstImage->mt->last_level >= intelObj->lastLevel) {
159
160      if (intelObj->mt)
161         intel_miptree_release(intel, &intelObj->mt);
162
163      intel_miptree_reference(&intelObj->mt, firstImage->mt);
164   }
165
166   if (_mesa_is_format_compressed(firstImage->base.TexFormat)) {
167      comp_byte = intel_compressed_num_bytes(firstImage->base.TexFormat);
168      cpp = comp_byte;
169   }
170   else
171      cpp = _mesa_get_format_bytes(firstImage->base.TexFormat);
172
173   /* Check tree can hold all active levels.  Check tree matches
174    * target, imageFormat, etc.
175    *
176    * XXX: For some layouts (eg i945?), the test might have to be
177    * first_level == firstLevel, as the tree isn't valid except at the
178    * original start level.  Hope to get around this by
179    * programming minLod, maxLod, baseLevel into the hardware and
180    * leaving the tree alone.
181    */
182   if (intelObj->mt &&
183       (intelObj->mt->target != intelObj->base.Target ||
184	intelObj->mt->internal_format != firstImage->base.InternalFormat ||
185	intelObj->mt->first_level != intelObj->firstLevel ||
186	intelObj->mt->last_level != intelObj->lastLevel ||
187	intelObj->mt->width0 != firstImage->base.Width ||
188	intelObj->mt->height0 != firstImage->base.Height ||
189	intelObj->mt->depth0 != firstImage->base.Depth ||
190	intelObj->mt->cpp != cpp ||
191	intelObj->mt->compressed != _mesa_is_format_compressed(firstImage->base.TexFormat))) {
192      intel_miptree_release(intel, &intelObj->mt);
193   }
194
195
196   /* May need to create a new tree:
197    */
198   if (!intelObj->mt) {
199      intelObj->mt = intel_miptree_create(intel,
200                                          intelObj->base.Target,
201                                          firstImage->base._BaseFormat,
202                                          firstImage->base.InternalFormat,
203                                          intelObj->firstLevel,
204                                          intelObj->lastLevel,
205                                          firstImage->base.Width,
206                                          firstImage->base.Height,
207                                          firstImage->base.Depth,
208                                          cpp,
209                                          comp_byte,
210					  GL_TRUE);
211   }
212
213   /* Pull in any images not in the object's tree:
214    */
215   nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
216   for (face = 0; face < nr_faces; face++) {
217      for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++) {
218         struct intel_texture_image *intelImage =
219            intel_texture_image(intelObj->base.Image[face][i]);
220
221         /* Need to import images in main memory or held in other trees.
222	  * If it's a render target, then its data isn't needed to be in
223	  * the object tree (otherwise we'd be FBO incomplete), and we need
224	  * to keep track of the image's MT as needing to be pulled in still,
225	  * or we'll lose the rendering that's done to it.
226          */
227         if (intelObj->mt != intelImage->mt &&
228	     !intelImage->used_as_render_target) {
229            copy_image_data_to_tree(intel, intelObj, intelImage);
230         }
231      }
232   }
233
234   return GL_TRUE;
235}
236
237void
238intel_tex_map_level_images(struct intel_context *intel,
239			   struct intel_texture_object *intelObj,
240			   int level)
241{
242   GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
243   GLuint face;
244
245   for (face = 0; face < nr_faces; face++) {
246      struct intel_texture_image *intelImage =
247	 intel_texture_image(intelObj->base.Image[face][level]);
248
249      if (intelImage && intelImage->mt) {
250	 intelImage->base.Data =
251	    intel_miptree_image_map(intel,
252				    intelImage->mt,
253				    intelImage->face,
254				    intelImage->level,
255				    &intelImage->base.RowStride,
256				    intelImage->base.ImageOffsets);
257	 /* convert stride to texels, not bytes */
258	 intelImage->base.RowStride /= intelImage->mt->cpp;
259	 /* intelImage->base.ImageStride /= intelImage->mt->cpp; */
260      }
261   }
262}
263
264void
265intel_tex_unmap_level_images(struct intel_context *intel,
266			     struct intel_texture_object *intelObj,
267			     int level)
268{
269   GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
270   GLuint face;
271
272   for (face = 0; face < nr_faces; face++) {
273      struct intel_texture_image *intelImage =
274	 intel_texture_image(intelObj->base.Image[face][level]);
275
276      if (intelImage && intelImage->mt) {
277	 intel_miptree_image_unmap(intel, intelImage->mt);
278	 intelImage->base.Data = NULL;
279      }
280   }
281}
282
283void
284intel_tex_map_images(struct intel_context *intel,
285                     struct intel_texture_object *intelObj)
286{
287   int i;
288
289   DBG("%s\n", __FUNCTION__);
290
291   for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++)
292      intel_tex_map_level_images(intel, intelObj, i);
293}
294
295void
296intel_tex_unmap_images(struct intel_context *intel,
297                       struct intel_texture_object *intelObj)
298{
299   int i;
300
301   for (i = intelObj->firstLevel; i <= intelObj->lastLevel; i++)
302      intel_tex_unmap_level_images(intel, intelObj, i);
303}
304