2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
6 Permission is hereby granted, free of charge, to any person obtaining
7 a 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, sublicense, 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
16 portions of the Software.
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **********************************************************************/
29 * Keith Whitwell <keith@tungstengraphics.com>
32 /* Code to layout images in a mipmap tree for i965.
35 #include "intel_mipmap_tree.h"
36 #include "intel_tex_layout.h"
37 #include "intel_context.h"
38 #include "main/macros.h"
40 #define FILE_DEBUG_FLAG DEBUG_MIPTREE
42 GLboolean
brw_miptree_layout(struct intel_context
*intel
,
43 struct intel_mipmap_tree
*mt
,
46 /* XXX: these vary depending on image format: */
47 /* GLint align_w = 4; */
50 case GL_TEXTURE_CUBE_MAP
:
51 if (intel
->gen
>= 5) {
57 /* On Ironlake, cube maps are finally represented as just a series
58 * of MIPLAYOUT_BELOW 2D textures (like 2D texture arrays), separated
59 * by a pitch of qpitch rows, where qpitch is defined by the equation
60 * given in Volume 1 of the BSpec.
62 h0
= ALIGN(mt
->height0
, align_h
);
63 h1
= ALIGN(minify(h0
), align_h
);
64 qpitch
= (h0
+ h1
+ (intel
->gen
>= 7 ? 12 : 11) * align_h
);
68 i945_miptree_layout_2d(intel
, mt
, tiling
, 6);
70 for (level
= mt
->first_level
; level
<= mt
->last_level
; level
++) {
71 for (q
= 0; q
< 6; q
++) {
72 intel_miptree_set_image_offset(mt
, level
, q
, 0, q
* qpitch
);
75 mt
->total_height
= qpitch
* 6;
81 GLuint width
= mt
->width0
;
82 GLuint height
= mt
->height0
;
83 GLuint depth
= mt
->depth0
;
84 GLuint pack_x_pitch
, pack_x_nr
;
91 intel_get_texture_alignment_unit(mt
->format
, &align_w
, &align_h
);
94 mt
->total_width
= ALIGN(width
, align_w
);
95 pack_y_pitch
= (height
+ 3) / 4;
97 mt
->total_width
= mt
->width0
;
98 pack_y_pitch
= ALIGN(mt
->height0
, align_h
);
101 pack_x_pitch
= width
;
104 for (level
= mt
->first_level
; level
<= mt
->last_level
; level
++) {
105 GLuint nr_images
= mt
->target
== GL_TEXTURE_3D
? depth
: 6;
110 intel_miptree_set_level_info(mt
, level
, nr_images
,
112 width
, height
, depth
);
114 for (q
= 0; q
< nr_images
;) {
115 for (j
= 0; j
< pack_x_nr
&& q
< nr_images
; j
++, q
++) {
116 intel_miptree_set_image_offset(mt
, level
, q
, x
, y
);
125 mt
->total_height
+= y
;
126 width
= minify(width
);
127 height
= minify(height
);
128 depth
= minify(depth
);
130 if (mt
->compressed
) {
131 pack_y_pitch
= (height
+ 3) / 4;
133 if (pack_x_pitch
> ALIGN(width
, align_w
)) {
134 pack_x_pitch
= ALIGN(width
, align_w
);
138 if (pack_x_pitch
> 4) {
141 assert(pack_x_pitch
* pack_x_nr
<= mt
->total_width
);
144 if (pack_y_pitch
> 2) {
146 pack_y_pitch
= ALIGN(pack_y_pitch
, align_h
);
151 /* The 965's sampler lays cachelines out according to how accesses
152 * in the texture surfaces run, so they may be "vertical" through
153 * memory. As a result, the docs say in Surface Padding Requirements:
154 * Sampling Engine Surfaces that two extra rows of padding are required.
156 if (mt
->target
== GL_TEXTURE_CUBE_MAP
)
157 mt
->total_height
+= 2;
162 i945_miptree_layout_2d(intel
, mt
, tiling
, 1);
165 DBG("%s: %dx%dx%d\n", __FUNCTION__
,
166 mt
->total_width
, mt
->total_height
, mt
->cpp
);