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| /* |
| * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas. |
| * Copyright © 2006 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sublicense, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial |
| * portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE |
| * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| /** |
| * \file brw_tex_layout.cpp |
| * |
| * Code to lay out images in a mipmap tree. |
| * |
| * \author Keith Whitwell <keith@tungstengraphics.com> |
| * \author Michel Dänzer <michel@tungstengraphics.com> |
| */ |
| |
| #include "intel_mipmap_tree.h" |
| #include "brw_context.h" |
| #include "main/macros.h" |
| |
| #define FILE_DEBUG_FLAG DEBUG_MIPTREE |
| |
| static unsigned int |
| intel_horizontal_texture_alignment_unit(struct brw_context *brw, |
| gl_format format) |
| { |
| /** |
| * From the "Alignment Unit Size" section of various specs, namely: |
| * - Gen3 Spec: "Memory Data Formats" Volume, Section 1.20.1.4 |
| * - i965 and G45 PRMs: Volume 1, Section 6.17.3.4. |
| * - Ironlake and Sandybridge PRMs: Volume 1, Part 1, Section 7.18.3.4 |
| * - BSpec (for Ivybridge and slight variations in separate stencil) |
| * |
| * +----------------------------------------------------------------------+ |
| * | | alignment unit width ("i") | |
| * | Surface Property |-----------------------------| |
| * | | 915 | 965 | ILK | SNB | IVB | |
| * +----------------------------------------------------------------------+ |
| * | YUV 4:2:2 format | 8 | 4 | 4 | 4 | 4 | |
| * | BC1-5 compressed format (DXTn/S3TC) | 4 | 4 | 4 | 4 | 4 | |
| * | FXT1 compressed format | 8 | 8 | 8 | 8 | 8 | |
| * | Depth Buffer (16-bit) | 4 | 4 | 4 | 4 | 8 | |
| * | Depth Buffer (other) | 4 | 4 | 4 | 4 | 4 | |
| * | Separate Stencil Buffer | N/A | N/A | 8 | 8 | 8 | |
| * | All Others | 4 | 4 | 4 | 4 | 4 | |
| * +----------------------------------------------------------------------+ |
| * |
| * On IVB+, non-special cases can be overridden by setting the SURFACE_STATE |
| * "Surface Horizontal Alignment" field to HALIGN_4 or HALIGN_8. |
| */ |
| if (_mesa_is_format_compressed(format)) { |
| /* The hardware alignment requirements for compressed textures |
| * happen to match the block boundaries. |
| */ |
| unsigned int i, j; |
| _mesa_get_format_block_size(format, &i, &j); |
| return i; |
| } |
| |
| if (format == MESA_FORMAT_S8) |
| return 8; |
| |
| /* The depth alignment requirements in the table above are for rendering to |
| * depth miplevels using the LOD control fields. We don't use LOD control |
| * fields, and instead use page offsets plus intra-tile x/y offsets, which |
| * require that the low 3 bits are zero. To reduce the number of x/y |
| * offset workaround blits we do, align the X to 8, which depth texturing |
| * can handle (sadly, it can't handle 8 in the Y direction). |
| */ |
| if (brw->gen >= 7 && |
| _mesa_get_format_base_format(format) == GL_DEPTH_COMPONENT) |
| return 8; |
| |
| return 4; |
| } |
| |
| static unsigned int |
| intel_vertical_texture_alignment_unit(struct brw_context *brw, |
| gl_format format) |
| { |
| /** |
| * From the "Alignment Unit Size" section of various specs, namely: |
| * - Gen3 Spec: "Memory Data Formats" Volume, Section 1.20.1.4 |
| * - i965 and G45 PRMs: Volume 1, Section 6.17.3.4. |
| * - Ironlake and Sandybridge PRMs: Volume 1, Part 1, Section 7.18.3.4 |
| * - BSpec (for Ivybridge and slight variations in separate stencil) |
| * |
| * +----------------------------------------------------------------------+ |
| * | | alignment unit height ("j") | |
| * | Surface Property |-----------------------------| |
| * | | 915 | 965 | ILK | SNB | IVB | |
| * +----------------------------------------------------------------------+ |
| * | BC1-5 compressed format (DXTn/S3TC) | 4 | 4 | 4 | 4 | 4 | |
| * | FXT1 compressed format | 4 | 4 | 4 | 4 | 4 | |
| * | Depth Buffer | 2 | 2 | 2 | 4 | 4 | |
| * | Separate Stencil Buffer | N/A | N/A | N/A | 4 | 8 | |
| * | Multisampled (4x or 8x) render target | N/A | N/A | N/A | 4 | 4 | |
| * | All Others | 2 | 2 | 2 | 2 | 2 | |
| * +----------------------------------------------------------------------+ |
| * |
| * On SNB+, non-special cases can be overridden by setting the SURFACE_STATE |
| * "Surface Vertical Alignment" field to VALIGN_2 or VALIGN_4. |
| * |
| * We currently don't support multisampling. |
| */ |
| if (_mesa_is_format_compressed(format)) |
| return 4; |
| |
| if (format == MESA_FORMAT_S8) |
| return brw->gen >= 7 ? 8 : 4; |
| |
| GLenum base_format = _mesa_get_format_base_format(format); |
| |
| if (brw->gen >= 6 && |
| (base_format == GL_DEPTH_COMPONENT || |
| base_format == GL_DEPTH_STENCIL)) { |
| return 4; |
| } |
| |
| return 2; |
| } |
| |
| static void |
| brw_miptree_layout_2d(struct intel_mipmap_tree *mt) |
| { |
| unsigned x = 0; |
| unsigned y = 0; |
| unsigned width = mt->physical_width0; |
| unsigned height = mt->physical_height0; |
| unsigned depth = mt->physical_depth0; /* number of array layers. */ |
| |
| mt->total_width = mt->physical_width0; |
| |
| if (mt->compressed) { |
| mt->total_width = ALIGN(mt->physical_width0, mt->align_w); |
| } |
| |
| /* May need to adjust width to accomodate the placement of |
| * the 2nd mipmap. This occurs when the alignment |
| * constraints of mipmap placement push the right edge of the |
| * 2nd mipmap out past the width of its parent. |
| */ |
| if (mt->first_level != mt->last_level) { |
| unsigned mip1_width; |
| |
| if (mt->compressed) { |
| mip1_width = ALIGN(minify(mt->physical_width0, 1), mt->align_w) + |
| ALIGN(minify(mt->physical_width0, 2), mt->align_w); |
| } else { |
| mip1_width = ALIGN(minify(mt->physical_width0, 1), mt->align_w) + |
| minify(mt->physical_width0, 2); |
| } |
| |
| if (mip1_width > mt->total_width) { |
| mt->total_width = mip1_width; |
| } |
| } |
| |
| mt->total_height = 0; |
| |
| for (unsigned level = mt->first_level; level <= mt->last_level; level++) { |
| unsigned img_height; |
| |
| intel_miptree_set_level_info(mt, level, x, y, width, |
| height, depth); |
| |
| img_height = ALIGN(height, mt->align_h); |
| if (mt->compressed) |
| img_height /= mt->align_h; |
| |
| /* Because the images are packed better, the final offset |
| * might not be the maximal one: |
| */ |
| mt->total_height = MAX2(mt->total_height, y + img_height); |
| |
| /* Layout_below: step right after second mipmap. |
| */ |
| if (level == mt->first_level + 1) { |
| x += ALIGN(width, mt->align_w); |
| } else { |
| y += img_height; |
| } |
| |
| width = minify(width, 1); |
| height = minify(height, 1); |
| } |
| } |
| |
| static void |
| align_cube(struct intel_mipmap_tree *mt) |
| { |
| /* The 965's sampler lays cachelines out according to how accesses |
| * in the texture surfaces run, so they may be "vertical" through |
| * memory. As a result, the docs say in Surface Padding Requirements: |
| * Sampling Engine Surfaces that two extra rows of padding are required. |
| */ |
| if (mt->target == GL_TEXTURE_CUBE_MAP) |
| mt->total_height += 2; |
| } |
| |
| static void |
| brw_miptree_layout_texture_array(struct brw_context *brw, |
| struct intel_mipmap_tree *mt) |
| { |
| unsigned qpitch = 0; |
| int h0, h1; |
| |
| h0 = ALIGN(mt->physical_height0, mt->align_h); |
| h1 = ALIGN(minify(mt->physical_height0, 1), mt->align_h); |
| if (mt->array_spacing_lod0) |
| qpitch = h0; |
| else |
| qpitch = (h0 + h1 + (brw->gen >= 7 ? 12 : 11) * mt->align_h); |
| if (mt->compressed) |
| qpitch /= 4; |
| |
| brw_miptree_layout_2d(mt); |
| |
| for (unsigned level = mt->first_level; level <= mt->last_level; level++) { |
| for (int q = 0; q < mt->physical_depth0; q++) { |
| intel_miptree_set_image_offset(mt, level, q, 0, q * qpitch); |
| } |
| } |
| mt->total_height = qpitch * mt->physical_depth0; |
| |
| align_cube(mt); |
| } |
| |
| static void |
| brw_miptree_layout_texture_3d(struct brw_context *brw, |
| struct intel_mipmap_tree *mt) |
| { |
| unsigned yscale = mt->compressed ? 4 : 1; |
| |
| mt->total_width = 0; |
| mt->total_height = 0; |
| |
| unsigned ysum = 0; |
| for (unsigned level = mt->first_level; level <= mt->last_level; level++) { |
| unsigned WL = MAX2(mt->physical_width0 >> level, 1); |
| unsigned HL = MAX2(mt->physical_height0 >> level, 1); |
| unsigned DL = MAX2(mt->physical_depth0 >> level, 1); |
| unsigned wL = ALIGN(WL, mt->align_w); |
| unsigned hL = ALIGN(HL, mt->align_h); |
| |
| if (mt->target == GL_TEXTURE_CUBE_MAP) |
| DL = 6; |
| |
| intel_miptree_set_level_info(mt, level, 0, 0, WL, HL, DL); |
| |
| for (unsigned q = 0; q < DL; q++) { |
| unsigned x = (q % (1 << level)) * wL; |
| unsigned y = ysum + (q >> level) * hL; |
| |
| intel_miptree_set_image_offset(mt, level, q, x, y / yscale); |
| mt->total_width = MAX2(mt->total_width, x + wL); |
| mt->total_height = MAX2(mt->total_height, (y + hL) / yscale); |
| } |
| |
| ysum += ALIGN(DL, 1 << level) / (1 << level) * hL; |
| } |
| |
| align_cube(mt); |
| } |
| |
| void |
| brw_miptree_layout(struct brw_context *brw, struct intel_mipmap_tree *mt) |
| { |
| mt->align_w = intel_horizontal_texture_alignment_unit(brw, mt->format); |
| mt->align_h = intel_vertical_texture_alignment_unit(brw, mt->format); |
| |
| switch (mt->target) { |
| case GL_TEXTURE_CUBE_MAP: |
| if (brw->gen == 4) { |
| /* Gen4 stores cube maps as 3D textures. */ |
| assert(mt->physical_depth0 == 6); |
| brw_miptree_layout_texture_3d(brw, mt); |
| } else { |
| /* All other hardware stores cube maps as 2D arrays. */ |
| brw_miptree_layout_texture_array(brw, mt); |
| } |
| break; |
| |
| case GL_TEXTURE_3D: |
| brw_miptree_layout_texture_3d(brw, mt); |
| break; |
| |
| case GL_TEXTURE_1D_ARRAY: |
| case GL_TEXTURE_2D_ARRAY: |
| case GL_TEXTURE_2D_MULTISAMPLE_ARRAY: |
| case GL_TEXTURE_CUBE_MAP_ARRAY: |
| brw_miptree_layout_texture_array(brw, mt); |
| break; |
| |
| default: |
| switch (mt->msaa_layout) { |
| case INTEL_MSAA_LAYOUT_UMS: |
| case INTEL_MSAA_LAYOUT_CMS: |
| brw_miptree_layout_texture_array(brw, mt); |
| break; |
| case INTEL_MSAA_LAYOUT_NONE: |
| case INTEL_MSAA_LAYOUT_IMS: |
| brw_miptree_layout_2d(mt); |
| break; |
| } |
| break; |
| } |
| DBG("%s: %dx%dx%d\n", __FUNCTION__, |
| mt->total_width, mt->total_height, mt->cpp); |
| } |
| |