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
);
77 if (format
== MESA_FORMAT_S8
)
80 if (intel
->gen
>= 7 && format
== MESA_FORMAT_Z16
)
87 intel_vertical_texture_alignment_unit(struct intel_context
*intel
,
91 * From the "Alignment Unit Size" section of various specs, namely:
92 * - Gen3 Spec: "Memory Data Formats" Volume, Section 1.20.1.4
93 * - i965 and G45 PRMs: Volume 1, Section 6.17.3.4.
94 * - Ironlake and Sandybridge PRMs: Volume 1, Part 1, Section 7.18.3.4
95 * - BSpec (for Ivybridge and slight variations in separate stencil)
97 * +----------------------------------------------------------------------+
98 * | | alignment unit height ("j") |
99 * | Surface Property |-----------------------------|
100 * | | 915 | 965 | ILK | SNB | IVB |
101 * +----------------------------------------------------------------------+
102 * | BC1-5 compressed format (DXTn/S3TC) | 4 | 4 | 4 | 4 | 4 |
103 * | FXT1 compressed format | 4 | 4 | 4 | 4 | 4 |
104 * | Depth Buffer | 2 | 2 | 2 | 4 | 4 |
105 * | Separate Stencil Buffer | N/A | N/A | N/A | 4 | 8 |
106 * | Multisampled (4x or 8x) render target | N/A | N/A | N/A | 4 | 4 |
107 * | All Others | 2 | 2 | 2 | 2 | 2 |
108 * +----------------------------------------------------------------------+
110 * On SNB+, non-special cases can be overridden by setting the SURFACE_STATE
111 * "Surface Vertical Alignment" field to VALIGN_2 or VALIGN_4.
113 * We currently don't support multisampling.
115 if (_mesa_is_format_compressed(format
))
118 if (format
== MESA_FORMAT_S8
)
119 return intel
->gen
>= 7 ? 8 : 4;
121 GLenum base_format
= _mesa_get_format_base_format(format
);
123 if (intel
->gen
>= 6 &&
124 (base_format
== GL_DEPTH_COMPONENT
||
125 base_format
== GL_DEPTH_STENCIL
)) {
133 intel_get_texture_alignment_unit(struct intel_context
*intel
,
135 unsigned int *w
, unsigned int *h
)
137 *w
= intel_horizontal_texture_alignment_unit(intel
, format
);
138 *h
= intel_vertical_texture_alignment_unit(intel
, format
);
141 void i945_miptree_layout_2d(struct intel_mipmap_tree
*mt
)
146 GLuint width
= mt
->width0
;
147 GLuint height
= mt
->height0
;
148 GLuint depth
= mt
->depth0
; /* number of array layers. */
150 mt
->total_width
= mt
->width0
;
152 if (mt
->compressed
) {
153 mt
->total_width
= ALIGN(mt
->width0
, mt
->align_w
);
156 /* May need to adjust width to accomodate the placement of
157 * the 2nd mipmap. This occurs when the alignment
158 * constraints of mipmap placement push the right edge of the
159 * 2nd mipmap out past the width of its parent.
161 if (mt
->first_level
!= mt
->last_level
) {
164 if (mt
->compressed
) {
165 mip1_width
= ALIGN(minify(mt
->width0
), mt
->align_w
)
166 + ALIGN(minify(minify(mt
->width0
)), mt
->align_w
);
168 mip1_width
= ALIGN(minify(mt
->width0
), mt
->align_w
)
169 + minify(minify(mt
->width0
));
172 if (mip1_width
> mt
->total_width
) {
173 mt
->total_width
= mip1_width
;
177 mt
->total_height
= 0;
179 for ( level
= mt
->first_level
; level
<= mt
->last_level
; level
++ ) {
182 intel_miptree_set_level_info(mt
, level
, x
, y
, width
,
185 img_height
= ALIGN(height
, mt
->align_h
);
187 img_height
/= mt
->align_h
;
189 /* Because the images are packed better, the final offset
190 * might not be the maximal one:
192 mt
->total_height
= MAX2(mt
->total_height
, y
+ img_height
);
194 /* Layout_below: step right after second mipmap.
196 if (level
== mt
->first_level
+ 1) {
197 x
+= ALIGN(width
, mt
->align_w
);
203 width
= minify(width
);
204 height
= minify(height
);