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
9 * without limitation the rights to use, copy, modify, merge, publish,
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 **************************************************************************/
29 * Keith Whitwell <keith@tungstengraphics.com>
30 * Michel Dänzer <michel@tungstengraphics.com>
33 #include "intel_mipmap_tree.h"
34 #include "intel_tex_layout.h"
35 #include "intel_context.h"
37 #include "main/image.h"
38 #include "main/macros.h"
41 intel_horizontal_texture_alignment_unit(struct intel_context
*intel
,
45 * From the "Alignment Unit Size" section of various specs, namely:
46 * - Gen3 Spec: "Memory Data Formats" Volume, Section 1.20.1.4
47 * - i965 and G45 PRMs: Volume 1, Section 6.17.3.4.
48 * - Ironlake and Sandybridge PRMs: Volume 1, Part 1, Section 7.18.3.4
49 * - BSpec (for Ivybridge and slight variations in separate stencil)
51 * +----------------------------------------------------------------------+
52 * | | alignment unit width ("i") |
53 * | Surface Property |-----------------------------|
54 * | | 915 | 965 | ILK | SNB | IVB |
55 * +----------------------------------------------------------------------+
56 * | YUV 4:2:2 format | 8 | 4 | 4 | 4 | 4 |
57 * | BC1-5 compressed format (DXTn/S3TC) | 4 | 4 | 4 | 4 | 4 |
58 * | FXT1 compressed format | 8 | 8 | 8 | 8 | 8 |
59 * | Depth Buffer (16-bit) | 4 | 4 | 4 | 4 | 8 |
60 * | Depth Buffer (other) | 4 | 4 | 4 | 4 | 4 |
61 * | Separate Stencil Buffer | N/A | N/A | 8 | 8 | 8 |
62 * | All Others | 4 | 4 | 4 | 4 | 4 |
63 * +----------------------------------------------------------------------+
65 * On IVB+, non-special cases can be overridden by setting the SURFACE_STATE
66 * "Surface Horizontal Alignment" field to HALIGN_4 or HALIGN_8.
68 if (_mesa_is_format_compressed(format
)) {
69 /* The hardware alignment requirements for compressed textures
70 * happen to match the block boundaries.
73 _mesa_get_format_block_size(format
, &i
, &j
);
81 intel_vertical_texture_alignment_unit(struct intel_context
*intel
,
85 * From the "Alignment Unit Size" section of various specs, namely:
86 * - Gen3 Spec: "Memory Data Formats" Volume, Section 1.20.1.4
87 * - i965 and G45 PRMs: Volume 1, Section 6.17.3.4.
88 * - Ironlake and Sandybridge PRMs: Volume 1, Part 1, Section 7.18.3.4
89 * - BSpec (for Ivybridge and slight variations in separate stencil)
91 * +----------------------------------------------------------------------+
92 * | | alignment unit height ("j") |
93 * | Surface Property |-----------------------------|
94 * | | 915 | 965 | ILK | SNB | IVB |
95 * +----------------------------------------------------------------------+
96 * | BC1-5 compressed format (DXTn/S3TC) | 4 | 4 | 4 | 4 | 4 |
97 * | FXT1 compressed format | 4 | 4 | 4 | 4 | 4 |
98 * | Depth Buffer | 2 | 2 | 2 | 4 | 4 |
99 * | Separate Stencil Buffer | N/A | N/A | N/A | 4 | 8 |
100 * | Multisampled (4x or 8x) render target | N/A | N/A | N/A | 4 | 4 |
101 * | All Others | 2 | 2 | 2 | 2 | 2 |
102 * +----------------------------------------------------------------------+
104 * On SNB+, non-special cases can be overridden by setting the SURFACE_STATE
105 * "Surface Vertical Alignment" field to VALIGN_2 or VALIGN_4.
107 * We currently don't support multisampling.
109 if (_mesa_is_format_compressed(format
))
116 intel_get_texture_alignment_unit(struct intel_context
*intel
,
118 unsigned int *w
, unsigned int *h
)
120 *w
= intel_horizontal_texture_alignment_unit(intel
, format
);
121 *h
= intel_vertical_texture_alignment_unit(intel
, format
);
124 void i945_miptree_layout_2d(struct intel_mipmap_tree
*mt
)
129 GLuint width
= mt
->physical_width0
;
130 GLuint height
= mt
->physical_height0
;
131 GLuint depth
= mt
->physical_depth0
; /* number of array layers. */
133 mt
->total_width
= mt
->physical_width0
;
135 if (mt
->compressed
) {
136 mt
->total_width
= ALIGN(mt
->physical_width0
, mt
->align_w
);
139 /* May need to adjust width to accomodate the placement of
140 * the 2nd mipmap. This occurs when the alignment
141 * constraints of mipmap placement push the right edge of the
142 * 2nd mipmap out past the width of its parent.
144 if (mt
->first_level
!= mt
->last_level
) {
147 if (mt
->compressed
) {
148 mip1_width
= ALIGN(minify(mt
->physical_width0
, 1), mt
->align_w
) +
149 ALIGN(minify(mt
->physical_width0
, 2), mt
->align_w
);
151 mip1_width
= ALIGN(minify(mt
->physical_width0
, 1), mt
->align_w
) +
152 minify(mt
->physical_width0
, 2);
155 if (mip1_width
> mt
->total_width
) {
156 mt
->total_width
= mip1_width
;
160 mt
->total_height
= 0;
162 for ( level
= mt
->first_level
; level
<= mt
->last_level
; level
++ ) {
165 intel_miptree_set_level_info(mt
, level
, x
, y
, width
,
168 img_height
= ALIGN(height
, mt
->align_h
);
170 img_height
/= mt
->align_h
;
172 /* Because the images are packed better, the final offset
173 * might not be the maximal one:
175 mt
->total_height
= MAX2(mt
->total_height
, y
+ img_height
);
177 /* Layout_below: step right after second mipmap.
179 if (level
== mt
->first_level
+ 1) {
180 x
+= ALIGN(width
, mt
->align_w
);
186 width
= minify(width
, 1);
187 height
= minify(height
, 1);