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"
36 #include "main/macros.h"
38 void intel_get_texture_alignment_unit(GLenum internalFormat
, GLuint
*w
, GLuint
*h
)
40 switch (internalFormat
) {
41 case GL_COMPRESSED_RGB_FXT1_3DFX
:
42 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
49 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
50 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
53 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
54 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
66 void i945_miptree_layout_2d(struct intel_context
*intel
,
67 struct intel_mipmap_tree
*mt
,
68 uint32_t tiling
, int nr_images
)
70 GLuint align_h
= 2, align_w
= 4;
74 GLuint width
= mt
->width0
;
75 GLuint height
= mt
->height0
;
77 mt
->total_width
= mt
->width0
;
78 intel_get_texture_alignment_unit(mt
->internal_format
, &align_w
, &align_h
);
81 mt
->total_width
= ALIGN(mt
->width0
, align_w
);
84 /* May need to adjust width to accomodate the placement of
85 * the 2nd mipmap. This occurs when the alignment
86 * constraints of mipmap placement push the right edge of the
87 * 2nd mipmap out past the width of its parent.
89 if (mt
->first_level
!= mt
->last_level
) {
93 mip1_width
= ALIGN(minify(mt
->width0
), align_w
)
94 + ALIGN(minify(minify(mt
->width0
)), align_w
);
96 mip1_width
= ALIGN(minify(mt
->width0
), align_w
)
97 + minify(minify(mt
->width0
));
100 if (mip1_width
> mt
->total_width
) {
101 mt
->total_width
= mip1_width
;
105 mt
->total_height
= 0;
107 for ( level
= mt
->first_level
; level
<= mt
->last_level
; level
++ ) {
110 intel_miptree_set_level_info(mt
, level
, nr_images
, x
, y
, width
,
114 img_height
= MAX2(1, height
/4);
116 img_height
= ALIGN(height
, align_h
);
119 /* Because the images are packed better, the final offset
120 * might not be the maximal one:
122 mt
->total_height
= MAX2(mt
->total_height
, y
+ img_height
);
124 /* Layout_below: step right after second mipmap.
126 if (level
== mt
->first_level
+ 1) {
127 x
+= ALIGN(width
, align_w
);
133 width
= minify(width
);
134 height
= minify(height
);