/************************************************************************** * * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas. * All Rights Reserved. * * 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, sub license, 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 NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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. * **************************************************************************/ /* * Authors: * Keith Whitwell * Michel Dänzer */ #include "intel_mipmap_tree.h" #include "intel_tex_layout.h" #include "intel_context.h" #include "main/image.h" #include "main/macros.h" static unsigned int intel_horizontal_texture_alignment_unit(struct intel_context *intel, 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; if (intel->gen >= 7 && format == MESA_FORMAT_Z16) return 8; return 4; } static unsigned int intel_vertical_texture_alignment_unit(struct intel_context *intel, 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 intel->gen >= 7 ? 8 : 4; GLenum base_format = _mesa_get_format_base_format(format); if (intel->gen >= 6 && (base_format == GL_DEPTH_COMPONENT || base_format == GL_DEPTH_STENCIL)) { return 4; } return 2; } void intel_get_texture_alignment_unit(struct intel_context *intel, gl_format format, unsigned int *w, unsigned int *h) { *w = intel_horizontal_texture_alignment_unit(intel, format); *h = intel_vertical_texture_alignment_unit(intel, format); } void i945_miptree_layout_2d(struct intel_mipmap_tree *mt) { GLuint level; GLuint x = 0; GLuint y = 0; GLuint width = mt->physical_width0; GLuint height = mt->physical_height0; GLuint 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) { GLuint mip1_width; if (mt->compressed) { mip1_width = ALIGN(minify(mt->physical_width0), mt->align_w) + ALIGN(minify(minify(mt->physical_width0)), mt->align_w); } else { mip1_width = ALIGN(minify(mt->physical_width0), mt->align_w) + minify(minify(mt->physical_width0)); } if (mip1_width > mt->total_width) { mt->total_width = mip1_width; } } mt->total_height = 0; for ( level = mt->first_level ; level <= mt->last_level ; level++ ) { GLuint 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); height = minify(height); } }