intel_tex_validate.c revision a07cf3397e332388d3599c83e50ac45511972890 
1#include "main/mtypes.h"
2#include "main/macros.h"
3#include "main/samplerobj.h"
4
5#include "intel_context.h"
6#include "intel_mipmap_tree.h"
7#include "intel_blit.h"
8#include "intel_tex.h"
9#include "intel_tex_layout.h"
10
11#define FILE_DEBUG_FLAG DEBUG_TEXTURE
12
13/**
14 * When validating, we only care about the texture images that could
15 * be seen, so for non-mipmapped modes we want to ignore everything
16 * but BaseLevel.
17 */
18static void
19intel_update_max_level(struct intel_texture_object *intelObj,
20		       struct gl_sampler_object *sampler)
21{
22   struct gl_texture_object *tObj = &intelObj->base;
23
24   if (sampler->MinFilter == GL_NEAREST ||
25       sampler->MinFilter == GL_LINEAR) {
26      intelObj->_MaxLevel = tObj->BaseLevel;
27   } else {
28      intelObj->_MaxLevel = tObj->_MaxLevel;
29   }
30}
31
32/*
33 */
34GLuint
35intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
36{
37   struct gl_context *ctx = &intel->ctx;
38   struct gl_texture_object *tObj = intel->ctx.Texture.Unit[unit]._Current;
39   struct intel_texture_object *intelObj = intel_texture_object(tObj);
40   struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit);
41   GLuint face, i;
42   GLuint nr_faces = 0;
43   struct intel_texture_image *firstImage;
44   int width, height, depth;
45
46   /* TBOs require no validation -- they always just point to their BO. */
47   if (tObj->Target == GL_TEXTURE_BUFFER)
48      return true;
49
50   /* We know/require this is true by now:
51    */
52   assert(intelObj->base._BaseComplete);
53
54   /* What levels must the tree include at a minimum?
55    */
56   intel_update_max_level(intelObj, sampler);
57   firstImage = intel_texture_image(tObj->Image[0][tObj->BaseLevel]);
58
59   /* Check tree can hold all active levels.  Check tree matches
60    * target, imageFormat, etc.
61    *
62    * For pre-gen4, we have to match first_level == tObj->BaseLevel,
63    * because we don't have the control that gen4 does to make min/mag
64    * determination happen at a nonzero (hardware) baselevel.  Because
65    * of that, we just always relayout on baselevel change.
66    */
67   if (intelObj->mt &&
68       (!intel_miptree_match_image(intelObj->mt, &firstImage->base.Base) ||
69	intelObj->mt->first_level != tObj->BaseLevel ||
70	intelObj->mt->last_level < intelObj->_MaxLevel)) {
71      intel_miptree_release(&intelObj->mt);
72   }
73
74
75   /* May need to create a new tree:
76    */
77   if (!intelObj->mt) {
78      intel_miptree_get_dimensions_for_image(&firstImage->base.Base,
79					     &width, &height, &depth);
80
81      intelObj->mt = intel_miptree_create(intel,
82                                          intelObj->base.Target,
83					  firstImage->base.Base.TexFormat,
84                                          tObj->BaseLevel,
85                                          intelObj->_MaxLevel,
86                                          width,
87                                          height,
88                                          depth,
89					  true);
90      if (!intelObj->mt)
91         return false;
92   }
93
94   /* Pull in any images not in the object's tree:
95    */
96   nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
97   for (face = 0; face < nr_faces; face++) {
98      for (i = tObj->BaseLevel; i <= intelObj->_MaxLevel; i++) {
99         struct intel_texture_image *intelImage =
100            intel_texture_image(intelObj->base.Image[face][i]);
101	 /* skip too small size mipmap */
102 	 if (intelImage == NULL)
103		 break;
104
105         if (intelObj->mt != intelImage->mt) {
106            intel_miptree_copy_teximage(intel, intelImage, intelObj->mt);
107         }
108      }
109   }
110
111   return true;
112}
113
114/**
115 * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
116 */
117static void
118intel_tex_map_image_for_swrast(struct intel_context *intel,
119			       struct intel_texture_image *intel_image,
120			       GLbitfield mode)
121{
122   int level;
123   int face;
124   struct intel_mipmap_tree *mt;
125   unsigned int x, y;
126
127   if (!intel_image || !intel_image->mt)
128      return;
129
130   level = intel_image->base.Base.Level;
131   face = intel_image->base.Base.Face;
132   mt = intel_image->mt;
133
134   if (mt->target == GL_TEXTURE_3D ||
135       mt->target == GL_TEXTURE_2D_ARRAY ||
136       mt->target == GL_TEXTURE_1D_ARRAY) {
137      int i;
138
139      /* ImageOffsets[] is only used for swrast's fetch_texel_3d, so we can't
140       * share code with the normal path.
141       */
142      for (i = 0; i < mt->level[level].depth; i++) {
143	 intel_miptree_get_image_offset(mt, level, face, i, &x, &y);
144	 intel_image->base.ImageOffsets[i] = x + y * mt->region->pitch;
145      }
146
147      DBG("%s \n", __FUNCTION__);
148
149      intel_image->base.Map = intel_region_map(intel, mt->region, mode);
150   } else {
151      assert(intel_image->base.Base.Depth == 1);
152      intel_miptree_get_image_offset(mt, level, face, 0, &x, &y);
153
154      DBG("%s: (%d,%d) -> (%d, %d)/%d\n",
155	  __FUNCTION__, face, level, x, y, mt->region->pitch * mt->cpp);
156
157      intel_image->base.Map = intel_region_map(intel, mt->region, mode) +
158	 (x + y * mt->region->pitch) * mt->cpp;
159   }
160
161   intel_image->base.RowStride = mt->region->pitch;
162}
163
164static void
165intel_tex_unmap_image_for_swrast(struct intel_context *intel,
166				 struct intel_texture_image *intel_image)
167{
168   if (intel_image && intel_image->mt) {
169      intel_region_unmap(intel, intel_image->mt->region);
170      intel_image->base.Map = NULL;
171   }
172}
173
174/**
175 * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
176 */
177void
178intel_tex_map_images(struct intel_context *intel,
179		     struct intel_texture_object *intelObj,
180		     GLbitfield mode)
181{
182   GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
183   int i, face;
184
185   DBG("%s\n", __FUNCTION__);
186
187   for (i = intelObj->base.BaseLevel; i <= intelObj->_MaxLevel; i++) {
188      for (face = 0; face < nr_faces; face++) {
189	 struct intel_texture_image *intel_image =
190	    intel_texture_image(intelObj->base.Image[face][i]);
191
192	 intel_tex_map_image_for_swrast(intel, intel_image, mode);
193      }
194   }
195}
196
197void
198intel_tex_unmap_images(struct intel_context *intel,
199		       struct intel_texture_object *intelObj)
200{
201   GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
202   int i, face;
203
204   for (i = intelObj->base.BaseLevel; i <= intelObj->_MaxLevel; i++) {
205      for (face = 0; face < nr_faces; face++) {
206	 struct intel_texture_image *intel_image =
207	    intel_texture_image(intelObj->base.Image[face][i]);
208
209	 intel_tex_unmap_image_for_swrast(intel, intel_image);
210      }
211   }
212}
213