1 #include "main/mtypes.h"
2 #include "main/macros.h"
4 #include "intel_context.h"
5 #include "intel_mipmap_tree.h"
8 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
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.
16 intel_calculate_first_last_level(struct intel_context
*intel
,
17 struct intel_texture_object
*intelObj
)
19 struct gl_texture_object
*tObj
= &intelObj
->base
;
20 const struct gl_texture_image
*const baseImage
=
21 tObj
->Image
[0][tObj
->BaseLevel
];
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
27 int firstLevel
= tObj
->BaseLevel
;
30 /* Yes, this looks overly complicated, but it's all needed.
32 if (tObj
->MinFilter
== GL_NEAREST
|| tObj
->MinFilter
== GL_LINEAR
) {
33 /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
35 lastLevel
= tObj
->BaseLevel
;
37 if (intel
->gen
== 2) {
38 firstLevel
+= (GLint
) (tObj
->MinLod
+ 0.5);
39 firstLevel
= MAX2(firstLevel
, tObj
->BaseLevel
);
40 firstLevel
= MIN2(firstLevel
, tObj
->BaseLevel
+ baseImage
->MaxLog2
);
41 lastLevel
= tObj
->BaseLevel
+ (GLint
) (tObj
->MaxLod
+ 0.5);
42 lastLevel
= MAX2(lastLevel
, tObj
->BaseLevel
);
43 lastLevel
= MIN2(lastLevel
, tObj
->BaseLevel
+ baseImage
->MaxLog2
);
44 lastLevel
= MIN2(lastLevel
, tObj
->MaxLevel
);
45 lastLevel
= MAX2(firstLevel
, lastLevel
); /* need at least one level */
47 /* Min/max LOD are taken into account in sampler state. We don't
48 * want to re-layout textures just because clamping has been applied
49 * since it means a bunch of blitting around and probably no memory
50 * savings (since we have to keep the other levels around anyway).
52 lastLevel
= MIN2(tObj
->BaseLevel
+ baseImage
->MaxLog2
,
54 /* need at least one level */
55 lastLevel
= MAX2(firstLevel
, lastLevel
);
59 /* save these values */
60 intelObj
->firstLevel
= firstLevel
;
61 intelObj
->lastLevel
= lastLevel
;
65 * Copies the image's contents at its level into the object's miptree,
66 * and updates the image to point at the object's miptree.
69 copy_image_data_to_tree(struct intel_context
*intel
,
70 struct intel_texture_object
*intelObj
,
71 struct intel_texture_image
*intelImage
)
74 /* Copy potentially with the blitter:
76 intel_miptree_image_copy(intel
,
79 intelImage
->level
, intelImage
->mt
);
81 intel_miptree_release(intel
, &intelImage
->mt
);
84 assert(intelImage
->base
.Data
!= NULL
);
86 /* More straightforward upload.
88 intel_miptree_image_data(intel
,
92 intelImage
->base
.Data
,
93 intelImage
->base
.RowStride
,
94 intelImage
->base
.RowStride
*
95 intelImage
->base
.Height
);
96 _mesa_align_free(intelImage
->base
.Data
);
97 intelImage
->base
.Data
= NULL
;
100 intel_miptree_reference(&intelImage
->mt
, intelObj
->mt
);
107 intel_finalize_mipmap_tree(struct intel_context
*intel
, GLuint unit
)
109 struct gl_texture_object
*tObj
= intel
->ctx
.Texture
.Unit
[unit
]._Current
;
110 struct intel_texture_object
*intelObj
= intel_texture_object(tObj
);
115 struct intel_texture_image
*firstImage
;
117 /* We know/require this is true by now:
119 assert(intelObj
->base
._Complete
);
121 /* What levels must the tree include at a minimum?
123 intel_calculate_first_last_level(intel
, intelObj
);
124 firstImage
= intel_texture_image(tObj
->Image
[0][intelObj
->firstLevel
]);
128 if (firstImage
->base
.Border
) {
130 intel_miptree_release(intel
, &intelObj
->mt
);
136 /* If both firstImage and intelObj have a tree which can contain
137 * all active images, favour firstImage. Note that because of the
138 * completeness requirement, we know that the image dimensions
141 if (firstImage
->mt
&&
142 firstImage
->mt
!= intelObj
->mt
&&
143 firstImage
->mt
->first_level
<= intelObj
->firstLevel
&&
144 firstImage
->mt
->last_level
>= intelObj
->lastLevel
) {
147 intel_miptree_release(intel
, &intelObj
->mt
);
149 intel_miptree_reference(&intelObj
->mt
, firstImage
->mt
);
152 if (_mesa_is_format_compressed(firstImage
->base
.TexFormat
)) {
153 comp_byte
= intel_compressed_num_bytes(firstImage
->base
.TexFormat
);
157 cpp
= _mesa_get_format_bytes(firstImage
->base
.TexFormat
);
159 /* Check tree can hold all active levels. Check tree matches
160 * target, imageFormat, etc.
162 * XXX: For some layouts (eg i945?), the test might have to be
163 * first_level == firstLevel, as the tree isn't valid except at the
164 * original start level. Hope to get around this by
165 * programming minLod, maxLod, baseLevel into the hardware and
166 * leaving the tree alone.
169 (intelObj
->mt
->target
!= intelObj
->base
.Target
||
170 intelObj
->mt
->internal_format
!= firstImage
->base
.InternalFormat
||
171 intelObj
->mt
->first_level
!= intelObj
->firstLevel
||
172 intelObj
->mt
->last_level
!= intelObj
->lastLevel
||
173 intelObj
->mt
->width0
!= firstImage
->base
.Width
||
174 intelObj
->mt
->height0
!= firstImage
->base
.Height
||
175 intelObj
->mt
->depth0
!= firstImage
->base
.Depth
||
176 intelObj
->mt
->cpp
!= cpp
||
177 intelObj
->mt
->compressed
!= _mesa_is_format_compressed(firstImage
->base
.TexFormat
))) {
178 intel_miptree_release(intel
, &intelObj
->mt
);
182 /* May need to create a new tree:
185 intelObj
->mt
= intel_miptree_create(intel
,
186 intelObj
->base
.Target
,
187 firstImage
->base
._BaseFormat
,
188 firstImage
->base
.InternalFormat
,
189 intelObj
->firstLevel
,
191 firstImage
->base
.Width
,
192 firstImage
->base
.Height
,
193 firstImage
->base
.Depth
,
199 /* Pull in any images not in the object's tree:
201 nr_faces
= (intelObj
->base
.Target
== GL_TEXTURE_CUBE_MAP
) ? 6 : 1;
202 for (face
= 0; face
< nr_faces
; face
++) {
203 for (i
= intelObj
->firstLevel
; i
<= intelObj
->lastLevel
; i
++) {
204 struct intel_texture_image
*intelImage
=
205 intel_texture_image(intelObj
->base
.Image
[face
][i
]);
207 /* Need to import images in main memory or held in other trees.
208 * If it's a render target, then its data isn't needed to be in
209 * the object tree (otherwise we'd be FBO incomplete), and we need
210 * to keep track of the image's MT as needing to be pulled in still,
211 * or we'll lose the rendering that's done to it.
213 if (intelObj
->mt
!= intelImage
->mt
&&
214 !intelImage
->used_as_render_target
) {
215 copy_image_data_to_tree(intel
, intelObj
, intelImage
);
224 intel_tex_map_level_images(struct intel_context
*intel
,
225 struct intel_texture_object
*intelObj
,
228 GLuint nr_faces
= (intelObj
->base
.Target
== GL_TEXTURE_CUBE_MAP
) ? 6 : 1;
231 for (face
= 0; face
< nr_faces
; face
++) {
232 struct intel_texture_image
*intelImage
=
233 intel_texture_image(intelObj
->base
.Image
[face
][level
]);
235 if (intelImage
&& intelImage
->mt
) {
236 intelImage
->base
.Data
=
237 intel_miptree_image_map(intel
,
241 &intelImage
->base
.RowStride
,
242 intelImage
->base
.ImageOffsets
);
243 /* convert stride to texels, not bytes */
244 intelImage
->base
.RowStride
/= intelImage
->mt
->cpp
;
245 /* intelImage->base.ImageStride /= intelImage->mt->cpp; */
251 intel_tex_unmap_level_images(struct intel_context
*intel
,
252 struct intel_texture_object
*intelObj
,
255 GLuint nr_faces
= (intelObj
->base
.Target
== GL_TEXTURE_CUBE_MAP
) ? 6 : 1;
258 for (face
= 0; face
< nr_faces
; face
++) {
259 struct intel_texture_image
*intelImage
=
260 intel_texture_image(intelObj
->base
.Image
[face
][level
]);
262 if (intelImage
&& intelImage
->mt
) {
263 intel_miptree_image_unmap(intel
, intelImage
->mt
);
264 intelImage
->base
.Data
= NULL
;
270 intel_tex_map_images(struct intel_context
*intel
,
271 struct intel_texture_object
*intelObj
)
275 DBG("%s\n", __FUNCTION__
);
277 for (i
= intelObj
->firstLevel
; i
<= intelObj
->lastLevel
; i
++)
278 intel_tex_map_level_images(intel
, intelObj
, i
);
282 intel_tex_unmap_images(struct intel_context
*intel
,
283 struct intel_texture_object
*intelObj
)
287 for (i
= intelObj
->firstLevel
; i
<= intelObj
->lastLevel
; i
++)
288 intel_tex_unmap_level_images(intel
, intelObj
, i
);