1 /**************************************************************************
3 * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
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10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 /** @file i915_tex_layout.c
29 * Code to layout images in a mipmap tree for i830M-GM915 and G945 and beyond.
32 #include "intel_mipmap_tree.h"
33 #include "intel_tex_layout.h"
34 #include "main/macros.h"
35 #include "intel_context.h"
37 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
39 static GLint initial_offsets
[6][2] = {
40 [FACE_POS_X
] = {0, 0},
41 [FACE_POS_Y
] = {1, 0},
42 [FACE_POS_Z
] = {1, 1},
43 [FACE_NEG_X
] = {0, 2},
44 [FACE_NEG_Y
] = {1, 2},
45 [FACE_NEG_Z
] = {1, 3},
49 static GLint step_offsets
[6][2] = {
50 [FACE_POS_X
] = {0, 2},
51 [FACE_POS_Y
] = {-1, 2},
52 [FACE_POS_Z
] = {-1, 1},
53 [FACE_NEG_X
] = {0, 2},
54 [FACE_NEG_Y
] = {-1, 2},
55 [FACE_NEG_Z
] = {-1, 1},
59 static GLint bottom_offsets
[6] = {
60 [FACE_POS_X
] = 16 + 0 * 8,
61 [FACE_POS_Y
] = 16 + 1 * 8,
62 [FACE_POS_Z
] = 16 + 2 * 8,
63 [FACE_NEG_X
] = 16 + 3 * 8,
64 [FACE_NEG_Y
] = 16 + 4 * 8,
65 [FACE_NEG_Z
] = 16 + 5 * 8,
70 * Cube texture map layout for i830M-GM915 and
71 * non-compressed cube texture map on GM945.
73 * Hardware layout looks like:
115 i915_miptree_layout_cube(struct intel_context
*intel
,
116 struct intel_mipmap_tree
* mt
,
119 const GLuint dim
= mt
->width0
;
121 GLuint lvlWidth
= mt
->width0
, lvlHeight
= mt
->height0
;
124 assert(lvlWidth
== lvlHeight
); /* cubemap images are square */
126 /* double pitch for cube layouts */
127 mt
->total_width
= dim
* 2;
128 mt
->total_height
= dim
* 4;
130 for (level
= mt
->first_level
; level
<= mt
->last_level
; level
++) {
131 intel_miptree_set_level_info(mt
, level
, 6,
139 for (face
= 0; face
< 6; face
++) {
140 GLuint x
= initial_offsets
[face
][0] * dim
;
141 GLuint y
= initial_offsets
[face
][1] * dim
;
144 for (level
= mt
->first_level
; level
<= mt
->last_level
; level
++) {
145 intel_miptree_set_image_offset(mt
, level
, face
, x
, y
);
148 printf("cube mipmap %d/%d (%d..%d) is 0x0\n",
149 face
, level
, mt
->first_level
, mt
->last_level
);
152 x
+= step_offsets
[face
][0] * d
;
153 y
+= step_offsets
[face
][1] * d
;
159 i915_miptree_layout_3d(struct intel_context
*intel
,
160 struct intel_mipmap_tree
* mt
,
163 GLuint width
= mt
->width0
;
164 GLuint height
= mt
->height0
;
165 GLuint depth
= mt
->depth0
;
166 GLuint stack_height
= 0;
169 /* Calculate the size of a single slice. */
170 mt
->total_width
= mt
->width0
;
172 /* XXX: hardware expects/requires 9 levels at minimum. */
173 for (level
= mt
->first_level
; level
<= MAX2(8, mt
->last_level
); level
++) {
174 intel_miptree_set_level_info(mt
, level
, depth
, 0, mt
->total_height
,
175 width
, height
, depth
);
177 stack_height
+= MAX2(2, height
);
179 width
= minify(width
);
180 height
= minify(height
);
181 depth
= minify(depth
);
184 /* Fixup depth image_offsets: */
186 for (level
= mt
->first_level
; level
<= mt
->last_level
; level
++) {
188 for (i
= 0; i
< depth
; i
++) {
189 intel_miptree_set_image_offset(mt
, level
, i
,
190 0, i
* stack_height
);
193 depth
= minify(depth
);
196 /* Multiply slice size by texture depth for total size. It's
197 * remarkable how wasteful of memory the i915 texture layouts
198 * are. They are largely fixed in the i945.
200 mt
->total_height
= stack_height
* mt
->depth0
;
204 i915_miptree_layout_2d(struct intel_context
*intel
,
205 struct intel_mipmap_tree
* mt
,
208 GLuint width
= mt
->width0
;
209 GLuint height
= mt
->height0
;
213 mt
->total_width
= mt
->width0
;
214 mt
->total_height
= 0;
216 for (level
= mt
->first_level
; level
<= mt
->last_level
; level
++) {
217 intel_miptree_set_level_info(mt
, level
, 1,
222 img_height
= ALIGN(height
, 4) / 4;
224 img_height
= ALIGN(height
, 2);
226 mt
->total_height
+= img_height
;
228 width
= minify(width
);
229 height
= minify(height
);
234 i915_miptree_layout(struct intel_context
*intel
, struct intel_mipmap_tree
* mt
,
237 switch (mt
->target
) {
238 case GL_TEXTURE_CUBE_MAP
:
239 i915_miptree_layout_cube(intel
, mt
, tiling
);
242 i915_miptree_layout_3d(intel
, mt
, tiling
);
246 case GL_TEXTURE_RECTANGLE_ARB
:
247 i915_miptree_layout_2d(intel
, mt
, tiling
);
250 _mesa_problem(NULL
, "Unexpected tex target in i915_miptree_layout()");
254 DBG("%s: %dx%dx%d\n", __FUNCTION__
,
255 mt
->total_width
, mt
->total_height
, mt
->cpp
);
262 * Compressed cube texture map layout for GM945 and later.
264 * The hardware layout looks like the 830-915 layout, except for the small
265 * sizes. A zoomed in view of the layout for 945 is:
307 * +---+ +---+---+---+---+---+---+---+---+---+
308 * |4x4| |4x4| |2x2| |2x2| |2x2| |2x2|
309 * | +z| | -z| | +x| | +y| | +z| | -x| ...
310 * | | | | | | | | | | | |
311 * +---+ +---+ +---+ +---+ +---+ +---+
313 * The bottom row continues with the remaining 2x2 then the 1x1 mip contents
314 * in order, with each of them aligned to a 8x8 block boundary. Thus, for
315 * 32x32 cube maps and smaller, the bottom row layout is going to dictate the
316 * pitch of the tree. For a tree with 4x4 images, the pitch is at least
317 * 14 * 8 = 112 texels, for 2x2 it is at least 12 * 8 texels, and for 1x1
318 * it is 6 * 8 texels.
322 i945_miptree_layout_cube(struct intel_context
*intel
,
323 struct intel_mipmap_tree
* mt
,
326 const GLuint dim
= mt
->width0
;
328 GLuint lvlWidth
= mt
->width0
, lvlHeight
= mt
->height0
;
331 assert(lvlWidth
== lvlHeight
); /* cubemap images are square */
333 /* Depending on the size of the largest images, pitch can be
334 * determined either by the old-style packing of cubemap faces,
335 * or the final row of 4x4, 2x2 and 1x1 faces below this.
338 mt
->total_width
= dim
* 2;
340 mt
->total_width
= 14 * 8;
343 mt
->total_height
= dim
* 4 + 4;
345 mt
->total_height
= 4;
347 /* Set all the levels to effectively occupy the whole rectangular region. */
348 for (level
= mt
->first_level
; level
<= mt
->last_level
; level
++) {
349 intel_miptree_set_level_info(mt
, level
, 6,
351 lvlWidth
, lvlHeight
, 1);
356 for (face
= 0; face
< 6; face
++) {
357 GLuint x
= initial_offsets
[face
][0] * dim
;
358 GLuint y
= initial_offsets
[face
][1] * dim
;
361 if (dim
== 4 && face
>= 4) {
362 y
= mt
->total_height
- 4;
364 } else if (dim
< 4 && (face
> 0 || mt
->first_level
> 0)) {
365 y
= mt
->total_height
- 4;
369 for (level
= mt
->first_level
; level
<= mt
->last_level
; level
++) {
370 intel_miptree_set_image_offset(mt
, level
, face
, x
, y
);
379 x
+= step_offsets
[face
][0] * d
;
380 y
+= step_offsets
[face
][1] * d
;
389 y
= mt
->total_height
- 4;
396 y
= mt
->total_height
- 4;
397 x
= bottom_offsets
[face
];
405 x
+= step_offsets
[face
][0] * d
;
406 y
+= step_offsets
[face
][1] * d
;
414 i945_miptree_layout_3d(struct intel_context
*intel
,
415 struct intel_mipmap_tree
* mt
,
418 GLuint width
= mt
->width0
;
419 GLuint height
= mt
->height0
;
420 GLuint depth
= mt
->depth0
;
421 GLuint pack_x_pitch
, pack_x_nr
;
425 mt
->total_width
= mt
->width0
;
426 mt
->total_height
= 0;
428 pack_y_pitch
= MAX2(mt
->height0
, 2);
429 pack_x_pitch
= mt
->total_width
;
432 for (level
= mt
->first_level
; level
<= mt
->last_level
; level
++) {
437 intel_miptree_set_level_info(mt
, level
, depth
,
439 width
, height
, depth
);
441 for (q
= 0; q
< depth
;) {
442 for (j
= 0; j
< pack_x_nr
&& q
< depth
; j
++, q
++) {
443 intel_miptree_set_image_offset(mt
, level
, q
, x
, y
);
451 mt
->total_height
+= y
;
453 if (pack_x_pitch
> 4) {
456 assert(pack_x_pitch
* pack_x_nr
<= mt
->total_width
);
459 if (pack_y_pitch
> 2) {
463 width
= minify(width
);
464 height
= minify(height
);
465 depth
= minify(depth
);
470 i945_miptree_layout(struct intel_context
*intel
, struct intel_mipmap_tree
* mt
,
473 switch (mt
->target
) {
474 case GL_TEXTURE_CUBE_MAP
:
476 i945_miptree_layout_cube(intel
, mt
, tiling
);
478 i915_miptree_layout_cube(intel
, mt
, tiling
);
481 i945_miptree_layout_3d(intel
, mt
, tiling
);
485 case GL_TEXTURE_RECTANGLE_ARB
:
486 i945_miptree_layout_2d(intel
, mt
, tiling
, 1);
489 _mesa_problem(NULL
, "Unexpected tex target in i945_miptree_layout()");
493 DBG("%s: %dx%dx%d\n", __FUNCTION__
,
494 mt
->total_width
, mt
->total_height
, mt
->cpp
);