482 lines
12 KiB
C
482 lines
12 KiB
C
/**************************************************************************
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*
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* Copyright 2006 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/** @file i915_tex_layout.c
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* Code to layout images in a mipmap tree for i830M-GM915 and G945 and beyond.
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*/
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#include "intel_mipmap_tree.h"
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#include "intel_tex_layout.h"
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#include "main/macros.h"
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#include "intel_context.h"
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#define FILE_DEBUG_FLAG DEBUG_TEXTURE
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static GLint initial_offsets[6][2] = {
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[FACE_POS_X] = {0, 0},
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[FACE_POS_Y] = {1, 0},
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[FACE_POS_Z] = {1, 1},
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[FACE_NEG_X] = {0, 2},
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[FACE_NEG_Y] = {1, 2},
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[FACE_NEG_Z] = {1, 3},
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};
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static GLint step_offsets[6][2] = {
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[FACE_POS_X] = {0, 2},
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[FACE_POS_Y] = {-1, 2},
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[FACE_POS_Z] = {-1, 1},
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[FACE_NEG_X] = {0, 2},
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[FACE_NEG_Y] = {-1, 2},
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[FACE_NEG_Z] = {-1, 1},
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};
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static GLint bottom_offsets[6] = {
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[FACE_POS_X] = 16 + 0 * 8,
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[FACE_POS_Y] = 16 + 1 * 8,
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[FACE_POS_Z] = 16 + 2 * 8,
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[FACE_NEG_X] = 16 + 3 * 8,
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[FACE_NEG_Y] = 16 + 4 * 8,
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[FACE_NEG_Z] = 16 + 5 * 8,
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};
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/**
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* Cube texture map layout for i830M-GM915 and
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* non-compressed cube texture map on GM945.
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*
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* Hardware layout looks like:
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*
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* +-------+-------+
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* | | |
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* | | |
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* | | |
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* | +x | +y |
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* | | |
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* | | |
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* | | |
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* | | |
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* +---+---+-------+
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* | | | |
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* | +x| +y| |
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* | | | |
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* | | | |
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* +-+-+---+ +z |
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* | | | | |
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* +-+-+ +z| |
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* | | | |
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* +-+-+---+-------+
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* | | |
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* | | |
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* | | |
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* | -x | -y |
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* | | |
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* | | |
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* | | |
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* | | |
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* +---+---+-------+
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* | | | |
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* | -x| -y| |
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* | | | |
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* | | | |
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* +-+-+---+ -z |
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* | | | | |
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* +-+-+ -z| |
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* | | | |
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* +-+---+-------+
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*
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*/
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static void
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i915_miptree_layout_cube(struct intel_mipmap_tree * mt)
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{
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const GLuint dim = mt->physical_width0;
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GLuint face;
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GLuint lvlWidth = mt->physical_width0, lvlHeight = mt->physical_height0;
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GLint level;
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assert(lvlWidth == lvlHeight); /* cubemap images are square */
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/* double pitch for cube layouts */
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mt->total_width = dim * 2;
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mt->total_height = dim * 4;
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for (level = mt->first_level; level <= mt->last_level; level++) {
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intel_miptree_set_level_info(mt, level,
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0, 0,
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lvlWidth, lvlHeight,
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6);
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lvlWidth /= 2;
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lvlHeight /= 2;
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}
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for (face = 0; face < 6; face++) {
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GLuint x = initial_offsets[face][0] * dim;
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GLuint y = initial_offsets[face][1] * dim;
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GLuint d = dim;
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for (level = mt->first_level; level <= mt->last_level; level++) {
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intel_miptree_set_image_offset(mt, level, face, x, y);
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if (d == 0)
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printf("cube mipmap %d/%d (%d..%d) is 0x0\n",
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face, level, mt->first_level, mt->last_level);
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d >>= 1;
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x += step_offsets[face][0] * d;
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y += step_offsets[face][1] * d;
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}
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}
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}
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static void
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i915_miptree_layout_3d(struct intel_mipmap_tree * mt)
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{
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GLuint width = mt->physical_width0;
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GLuint height = mt->physical_height0;
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GLuint depth = mt->physical_depth0;
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GLuint stack_height = 0;
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GLint level;
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/* Calculate the size of a single slice. */
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mt->total_width = mt->physical_width0;
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/* XXX: hardware expects/requires 9 levels at minimum. */
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for (level = mt->first_level; level <= MAX2(8, mt->last_level); level++) {
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intel_miptree_set_level_info(mt, level, 0, mt->total_height,
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width, height, depth);
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stack_height += MAX2(2, height);
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width = minify(width, 1);
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height = minify(height, 1);
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depth = minify(depth, 1);
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}
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/* Fixup depth image_offsets: */
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depth = mt->physical_depth0;
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for (level = mt->first_level; level <= mt->last_level; level++) {
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GLuint i;
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for (i = 0; i < depth; i++) {
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intel_miptree_set_image_offset(mt, level, i,
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0, i * stack_height);
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}
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depth = minify(depth, 1);
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}
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/* Multiply slice size by texture depth for total size. It's
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* remarkable how wasteful of memory the i915 texture layouts
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* are. They are largely fixed in the i945.
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*/
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mt->total_height = stack_height * mt->physical_depth0;
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}
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static void
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i915_miptree_layout_2d(struct intel_mipmap_tree * mt)
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{
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GLuint width = mt->physical_width0;
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GLuint height = mt->physical_height0;
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GLuint img_height;
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GLint level;
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mt->total_width = mt->physical_width0;
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mt->total_height = 0;
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for (level = mt->first_level; level <= mt->last_level; level++) {
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intel_miptree_set_level_info(mt, level,
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0, mt->total_height,
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width, height, 1);
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if (mt->compressed)
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img_height = ALIGN(height, 4) / 4;
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else
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img_height = ALIGN(height, 2);
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mt->total_height += img_height;
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width = minify(width, 1);
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height = minify(height, 1);
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}
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}
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void
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i915_miptree_layout(struct intel_mipmap_tree * mt)
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{
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switch (mt->target) {
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case GL_TEXTURE_CUBE_MAP:
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i915_miptree_layout_cube(mt);
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break;
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case GL_TEXTURE_3D:
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i915_miptree_layout_3d(mt);
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break;
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case GL_TEXTURE_1D:
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case GL_TEXTURE_2D:
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case GL_TEXTURE_RECTANGLE_ARB:
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i915_miptree_layout_2d(mt);
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break;
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default:
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_mesa_problem(NULL, "Unexpected tex target in i915_miptree_layout()");
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break;
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}
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DBG("%s: %dx%dx%d\n", __func__,
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mt->total_width, mt->total_height, mt->cpp);
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}
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/**
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* Compressed cube texture map layout for GM945 and later.
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*
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* The hardware layout looks like the 830-915 layout, except for the small
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* sizes. A zoomed in view of the layout for 945 is:
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*
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* +-------+-------+
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* | 8x8 | 8x8 |
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* | | |
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* | | |
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* | +x | +y |
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* | | |
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* | | |
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* | | |
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* | | |
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* +---+---+-------+
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* |4x4| | 8x8 |
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* | +x| | |
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* | | | |
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* | | | |
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* +---+ | +z |
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* |4x4| | |
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* | +y| | |
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* | | | |
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* +---+ +-------+
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*
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* ...
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*
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* +-------+-------+
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* | 8x8 | 8x8 |
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* | | |
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* | | |
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* | -x | -y |
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* | | |
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* | | |
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* | | |
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* | | |
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* +---+---+-------+
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* |4x4| | 8x8 |
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* | -x| | |
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* | | | |
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* | | | |
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* +---+ | -z |
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* |4x4| | |
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* | -y| | |
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* | | | |
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* +---+ +---+---+---+---+---+---+---+---+---+
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* |4x4| |4x4| |2x2| |2x2| |2x2| |2x2|
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* | +z| | -z| | +x| | +y| | +z| | -x| ...
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* | | | | | | | | | | | |
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* +---+ +---+ +---+ +---+ +---+ +---+
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*
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* The bottom row continues with the remaining 2x2 then the 1x1 mip contents
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* in order, with each of them aligned to a 8x8 block boundary. Thus, for
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* 32x32 cube maps and smaller, the bottom row layout is going to dictate the
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* pitch of the tree. For a tree with 4x4 images, the pitch is at least
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* 14 * 8 = 112 texels, for 2x2 it is at least 12 * 8 texels, and for 1x1
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* it is 6 * 8 texels.
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*/
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static void
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i945_miptree_layout_cube(struct intel_mipmap_tree * mt)
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{
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const GLuint dim = mt->physical_width0;
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GLuint face;
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GLuint lvlWidth = mt->physical_width0, lvlHeight = mt->physical_height0;
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GLint level;
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assert(lvlWidth == lvlHeight); /* cubemap images are square */
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/* Depending on the size of the largest images, pitch can be
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* determined either by the old-style packing of cubemap faces,
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* or the final row of 4x4, 2x2 and 1x1 faces below this.
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*/
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if (dim > 32)
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mt->total_width = dim * 2;
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else
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mt->total_width = 14 * 8;
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if (dim >= 4)
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mt->total_height = dim * 4 + 4;
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else
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mt->total_height = 4;
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/* Set all the levels to effectively occupy the whole rectangular region. */
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for (level = mt->first_level; level <= mt->last_level; level++) {
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intel_miptree_set_level_info(mt, level,
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0, 0,
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lvlWidth, lvlHeight, 6);
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lvlWidth /= 2;
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lvlHeight /= 2;
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}
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for (face = 0; face < 6; face++) {
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GLuint x = initial_offsets[face][0] * dim;
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GLuint y = initial_offsets[face][1] * dim;
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GLuint d = dim;
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if (dim == 4 && face >= 4) {
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y = mt->total_height - 4;
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x = (face - 4) * 8;
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} else if (dim < 4 && (face > 0 || mt->first_level > 0)) {
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y = mt->total_height - 4;
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x = face * 8;
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}
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for (level = mt->first_level; level <= mt->last_level; level++) {
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intel_miptree_set_image_offset(mt, level, face, x, y);
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d >>= 1;
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switch (d) {
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case 4:
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switch (face) {
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case FACE_POS_X:
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case FACE_NEG_X:
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x += step_offsets[face][0] * d;
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y += step_offsets[face][1] * d;
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break;
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case FACE_POS_Y:
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case FACE_NEG_Y:
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y += 12;
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x -= 8;
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break;
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case FACE_POS_Z:
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case FACE_NEG_Z:
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y = mt->total_height - 4;
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x = (face - 4) * 8;
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break;
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}
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break;
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case 2:
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y = mt->total_height - 4;
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x = bottom_offsets[face];
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break;
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case 1:
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x += 48;
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break;
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default:
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x += step_offsets[face][0] * d;
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y += step_offsets[face][1] * d;
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break;
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}
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}
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}
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}
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static void
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i945_miptree_layout_3d(struct intel_mipmap_tree * mt)
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{
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GLuint width = mt->physical_width0;
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GLuint height = mt->physical_height0;
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GLuint depth = mt->physical_depth0;
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GLuint pack_x_pitch, pack_x_nr;
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GLuint pack_y_pitch;
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GLuint level;
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mt->total_width = mt->physical_width0;
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mt->total_height = 0;
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pack_y_pitch = MAX2(mt->physical_height0, 2);
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pack_x_pitch = mt->total_width;
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pack_x_nr = 1;
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for (level = mt->first_level; level <= mt->last_level; level++) {
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GLint x = 0;
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GLint y = 0;
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GLint q, j;
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intel_miptree_set_level_info(mt, level,
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0, mt->total_height,
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width, height, depth);
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for (q = 0; q < depth;) {
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for (j = 0; j < pack_x_nr && q < depth; j++, q++) {
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intel_miptree_set_image_offset(mt, level, q, x, y);
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x += pack_x_pitch;
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}
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x = 0;
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y += pack_y_pitch;
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}
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mt->total_height += y;
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if (pack_x_pitch > 4) {
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pack_x_pitch >>= 1;
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pack_x_nr <<= 1;
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assert(pack_x_pitch * pack_x_nr <= mt->total_width);
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}
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if (pack_y_pitch > 2) {
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pack_y_pitch >>= 1;
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}
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width = minify(width, 1);
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height = minify(height, 1);
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depth = minify(depth, 1);
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}
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}
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void
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i945_miptree_layout(struct intel_mipmap_tree * mt)
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{
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switch (mt->target) {
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case GL_TEXTURE_CUBE_MAP:
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if (mt->compressed)
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i945_miptree_layout_cube(mt);
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else
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i915_miptree_layout_cube(mt);
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break;
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case GL_TEXTURE_3D:
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i945_miptree_layout_3d(mt);
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break;
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case GL_TEXTURE_1D:
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case GL_TEXTURE_2D:
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case GL_TEXTURE_RECTANGLE_ARB:
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i945_miptree_layout_2d(mt);
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break;
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default:
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_mesa_problem(NULL, "Unexpected tex target in i945_miptree_layout()");
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break;
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}
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DBG("%s: %dx%dx%d\n", __func__,
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mt->total_width, mt->total_height, mt->cpp);
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}
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