4 #include "intel_context.h"
5 #include "intel_batchbuffer.h"
6 #include "intel_mipmap_tree.h"
9 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
12 * Compute which mipmap levels that really need to be sent to the hardware.
13 * This depends on the base image size, GL_TEXTURE_MIN_LOD,
14 * GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, and GL_TEXTURE_MAX_LEVEL.
17 intel_calculate_first_last_level(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
30 /* Yes, this looks overly complicated, but it's all needed.
32 switch (tObj
->Target
) {
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.
40 firstLevel
= lastLevel
= tObj
->BaseLevel
;
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 */
53 /* Currently not taking min/max lod into account here, those
54 * values are programmed as sampler state elsewhere and we
55 * upload the same mipmap levels regardless. Not sure if
56 * this makes sense as it means it isn't possible for the app
57 * to use min/max lod to reduce texture memory pressure:
59 firstLevel
= tObj
->BaseLevel
;
60 lastLevel
= MIN2(tObj
->BaseLevel
+ baseImage
->MaxLog2
,
62 lastLevel
= MAX2(firstLevel
, lastLevel
); /* need at least one level */
66 case GL_TEXTURE_RECTANGLE_NV
:
67 case GL_TEXTURE_4D_SGIS
:
68 firstLevel
= lastLevel
= 0;
74 /* save these values */
75 intelObj
->firstLevel
= firstLevel
;
76 intelObj
->lastLevel
= lastLevel
;
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.
84 copy_image_data_to_tree(struct intel_context
*intel
,
85 struct intel_texture_object
*intelObj
,
86 struct intel_texture_image
*intelImage
)
89 /* Copy potentially with the blitter:
91 intel_miptree_image_copy(intel
,
94 intelImage
->level
, intelImage
->mt
);
96 intel_miptree_release(intel
, &intelImage
->mt
);
99 assert(intelImage
->base
.Data
!= NULL
);
101 /* More straightforward upload.
103 intel_miptree_image_data(intel
,
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
;
115 intel_miptree_reference(&intelImage
->mt
, intelObj
->mt
);
122 intel_finalize_mipmap_tree(struct intel_context
*intel
, GLuint unit
)
124 struct gl_texture_object
*tObj
= intel
->ctx
.Texture
.Unit
[unit
]._Current
;
125 struct intel_texture_object
*intelObj
= intel_texture_object(tObj
);
130 struct intel_texture_image
*firstImage
;
132 /* We know/require this is true by now:
134 assert(intelObj
->base
._Complete
);
136 /* What levels must the tree include at a minimum?
138 intel_calculate_first_last_level(intelObj
);
140 intel_texture_image(intelObj
->base
.Image
[0][intelObj
->firstLevel
]);
144 if (firstImage
->base
.Border
||
145 ((firstImage
->base
._BaseFormat
== GL_DEPTH_COMPONENT
) &&
146 ((tObj
->WrapS
== GL_CLAMP_TO_BORDER
) ||
147 (tObj
->WrapT
== GL_CLAMP_TO_BORDER
)))) {
149 intel_miptree_release(intel
, &intelObj
->mt
);
155 /* If both firstImage and intelObj have a tree which can contain
156 * all active images, favour firstImage. Note that because of the
157 * completeness requirement, we know that the image dimensions
160 if (firstImage
->mt
&&
161 firstImage
->mt
!= intelObj
->mt
&&
162 firstImage
->mt
->first_level
<= intelObj
->firstLevel
&&
163 firstImage
->mt
->last_level
>= intelObj
->lastLevel
) {
166 intel_miptree_release(intel
, &intelObj
->mt
);
168 intel_miptree_reference(&intelObj
->mt
, firstImage
->mt
);
171 if (firstImage
->base
.IsCompressed
) {
172 comp_byte
= intel_compressed_num_bytes(firstImage
->base
.TexFormat
->MesaFormat
);
175 else cpp
= firstImage
->base
.TexFormat
->TexelBytes
;
177 /* Check tree can hold all active levels. Check tree matches
178 * target, imageFormat, etc.
180 * XXX: For some layouts (eg i945?), the test might have to be
181 * first_level == firstLevel, as the tree isn't valid except at the
182 * original start level. Hope to get around this by
183 * programming minLod, maxLod, baseLevel into the hardware and
184 * leaving the tree alone.
187 (intelObj
->mt
->target
!= intelObj
->base
.Target
||
188 intelObj
->mt
->internal_format
!= firstImage
->base
.InternalFormat
||
189 intelObj
->mt
->first_level
!= intelObj
->firstLevel
||
190 intelObj
->mt
->last_level
!= intelObj
->lastLevel
||
191 intelObj
->mt
->width0
!= firstImage
->base
.Width
||
192 intelObj
->mt
->height0
!= firstImage
->base
.Height
||
193 intelObj
->mt
->depth0
!= firstImage
->base
.Depth
||
194 intelObj
->mt
->cpp
!= cpp
||
195 intelObj
->mt
->compressed
!= firstImage
->base
.IsCompressed
)) {
196 intel_miptree_release(intel
, &intelObj
->mt
);
200 /* May need to create a new tree:
203 intelObj
->mt
= intel_miptree_create(intel
,
204 intelObj
->base
.Target
,
205 firstImage
->base
.InternalFormat
,
206 intelObj
->firstLevel
,
208 firstImage
->base
.Width
,
209 firstImage
->base
.Height
,
210 firstImage
->base
.Depth
,
215 /* Pull in any images not in the object's tree:
217 nr_faces
= (intelObj
->base
.Target
== GL_TEXTURE_CUBE_MAP
) ? 6 : 1;
218 for (face
= 0; face
< nr_faces
; face
++) {
219 for (i
= intelObj
->firstLevel
; i
<= intelObj
->lastLevel
; i
++) {
220 struct intel_texture_image
*intelImage
=
221 intel_texture_image(intelObj
->base
.Image
[face
][i
]);
223 /* Need to import images in main memory or held in other trees.
225 if (intelObj
->mt
!= intelImage
->mt
) {
226 copy_image_data_to_tree(intel
, intelObj
, intelImage
);
235 intel_tex_map_level_images(struct intel_context
*intel
,
236 struct intel_texture_object
*intelObj
,
239 GLuint nr_faces
= (intelObj
->base
.Target
== GL_TEXTURE_CUBE_MAP
) ? 6 : 1;
242 for (face
= 0; face
< nr_faces
; face
++) {
243 struct intel_texture_image
*intelImage
=
244 intel_texture_image(intelObj
->base
.Image
[face
][level
]);
246 if (intelImage
->mt
) {
247 intelImage
->base
.Data
=
248 intel_miptree_image_map(intel
,
252 &intelImage
->base
.RowStride
,
253 intelImage
->base
.ImageOffsets
);
254 /* convert stride to texels, not bytes */
255 intelImage
->base
.RowStride
/= intelImage
->mt
->cpp
;
256 /* intelImage->base.ImageStride /= intelImage->mt->cpp; */
262 intel_tex_unmap_level_images(struct intel_context
*intel
,
263 struct intel_texture_object
*intelObj
,
266 GLuint nr_faces
= (intelObj
->base
.Target
== GL_TEXTURE_CUBE_MAP
) ? 6 : 1;
269 for (face
= 0; face
< nr_faces
; face
++) {
270 struct intel_texture_image
*intelImage
=
271 intel_texture_image(intelObj
->base
.Image
[face
][level
]);
273 if (intelImage
->mt
) {
274 intel_miptree_image_unmap(intel
, intelImage
->mt
);
275 intelImage
->base
.Data
= NULL
;
281 intel_tex_map_images(struct intel_context
*intel
,
282 struct intel_texture_object
*intelObj
)
286 DBG("%s\n", __FUNCTION__
);
288 for (i
= intelObj
->firstLevel
; i
<= intelObj
->lastLevel
; i
++)
289 intel_tex_map_level_images(intel
, intelObj
, i
);
293 intel_tex_unmap_images(struct intel_context
*intel
,
294 struct intel_texture_object
*intelObj
)
298 for (i
= intelObj
->firstLevel
; i
<= intelObj
->lastLevel
; i
++)
299 intel_tex_unmap_level_images(intel
, intelObj
, i
);