/************************************************************************** * * 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. * **************************************************************************/ /** @file i915_tex_layout.c * Code to layout images in a mipmap tree for i830M-GM915 and G945 and beyond. */ #include "intel_mipmap_tree.h" #include "intel_tex_layout.h" #include "main/macros.h" #include "intel_context.h" #define FILE_DEBUG_FLAG DEBUG_TEXTURE static GLint initial_offsets[6][2] = { [FACE_POS_X] = {0, 0}, [FACE_POS_Y] = {1, 0}, [FACE_POS_Z] = {1, 1}, [FACE_NEG_X] = {0, 2}, [FACE_NEG_Y] = {1, 2}, [FACE_NEG_Z] = {1, 3}, }; static GLint step_offsets[6][2] = { [FACE_POS_X] = {0, 2}, [FACE_POS_Y] = {-1, 2}, [FACE_POS_Z] = {-1, 1}, [FACE_NEG_X] = {0, 2}, [FACE_NEG_Y] = {-1, 2}, [FACE_NEG_Z] = {-1, 1}, }; static GLint bottom_offsets[6] = { [FACE_POS_X] = 16 + 0 * 8, [FACE_POS_Y] = 16 + 1 * 8, [FACE_POS_Z] = 16 + 2 * 8, [FACE_NEG_X] = 16 + 3 * 8, [FACE_NEG_Y] = 16 + 4 * 8, [FACE_NEG_Z] = 16 + 5 * 8, }; /** * Cube texture map layout for i830M-GM915 and * non-compressed cube texture map on GM945. * * Hardware layout looks like: * * +-------+-------+ * | | | * | | | * | | | * | +x | +y | * | | | * | | | * | | | * | | | * +---+---+-------+ * | | | | * | +x| +y| | * | | | | * | | | | * +-+-+---+ +z | * | | | | | * +-+-+ +z| | * | | | | * +-+-+---+-------+ * | | | * | | | * | | | * | -x | -y | * | | | * | | | * | | | * | | | * +---+---+-------+ * | | | | * | -x| -y| | * | | | | * | | | | * +-+-+---+ -z | * | | | | | * +-+-+ -z| | * | | | | * +-+---+-------+ * */ static void i915_miptree_layout_cube(struct intel_mipmap_tree * mt) { const GLuint dim = mt->physical_width0; GLuint face; GLuint lvlWidth = mt->physical_width0, lvlHeight = mt->physical_height0; GLint level; assert(lvlWidth == lvlHeight); /* cubemap images are square */ /* double pitch for cube layouts */ mt->total_width = dim * 2; mt->total_height = dim * 4; for (level = mt->first_level; level <= mt->last_level; level++) { intel_miptree_set_level_info(mt, level, 0, 0, lvlWidth, lvlHeight, 6); lvlWidth /= 2; lvlHeight /= 2; } for (face = 0; face < 6; face++) { GLuint x = initial_offsets[face][0] * dim; GLuint y = initial_offsets[face][1] * dim; GLuint d = dim; for (level = mt->first_level; level <= mt->last_level; level++) { intel_miptree_set_image_offset(mt, level, face, x, y); if (d == 0) printf("cube mipmap %d/%d (%d..%d) is 0x0\n", face, level, mt->first_level, mt->last_level); d >>= 1; x += step_offsets[face][0] * d; y += step_offsets[face][1] * d; } } } static void i915_miptree_layout_3d(struct intel_mipmap_tree * mt) { GLuint width = mt->physical_width0; GLuint height = mt->physical_height0; GLuint depth = mt->physical_depth0; GLuint stack_height = 0; GLint level; /* Calculate the size of a single slice. */ mt->total_width = mt->physical_width0; /* XXX: hardware expects/requires 9 levels at minimum. */ for (level = mt->first_level; level <= MAX2(8, mt->last_level); level++) { intel_miptree_set_level_info(mt, level, 0, mt->total_height, width, height, depth); stack_height += MAX2(2, height); width = minify(width, 1); height = minify(height, 1); depth = minify(depth, 1); } /* Fixup depth image_offsets: */ depth = mt->physical_depth0; for (level = mt->first_level; level <= mt->last_level; level++) { GLuint i; for (i = 0; i < depth; i++) { intel_miptree_set_image_offset(mt, level, i, 0, i * stack_height); } depth = minify(depth, 1); } /* Multiply slice size by texture depth for total size. It's * remarkable how wasteful of memory the i915 texture layouts * are. They are largely fixed in the i945. */ mt->total_height = stack_height * mt->physical_depth0; } static void i915_miptree_layout_2d(struct intel_mipmap_tree * mt) { GLuint width = mt->physical_width0; GLuint height = mt->physical_height0; GLuint img_height; GLint level; mt->total_width = mt->physical_width0; mt->total_height = 0; for (level = mt->first_level; level <= mt->last_level; level++) { intel_miptree_set_level_info(mt, level, 0, mt->total_height, width, height, 1); if (mt->compressed) img_height = ALIGN(height, 4) / 4; else img_height = ALIGN(height, 2); mt->total_height += img_height; width = minify(width, 1); height = minify(height, 1); } } void i915_miptree_layout(struct intel_mipmap_tree * mt) { switch (mt->target) { case GL_TEXTURE_CUBE_MAP: i915_miptree_layout_cube(mt); break; case GL_TEXTURE_3D: i915_miptree_layout_3d(mt); break; case GL_TEXTURE_1D: case GL_TEXTURE_2D: case GL_TEXTURE_RECTANGLE_ARB: i915_miptree_layout_2d(mt); break; default: _mesa_problem(NULL, "Unexpected tex target in i915_miptree_layout()"); break; } DBG("%s: %dx%dx%d\n", __FUNCTION__, mt->total_width, mt->total_height, mt->cpp); } /** * Compressed cube texture map layout for GM945 and later. * * The hardware layout looks like the 830-915 layout, except for the small * sizes. A zoomed in view of the layout for 945 is: * * +-------+-------+ * | 8x8 | 8x8 | * | | | * | | | * | +x | +y | * | | | * | | | * | | | * | | | * +---+---+-------+ * |4x4| | 8x8 | * | +x| | | * | | | | * | | | | * +---+ | +z | * |4x4| | | * | +y| | | * | | | | * +---+ +-------+ * * ... * * +-------+-------+ * | 8x8 | 8x8 | * | | | * | | | * | -x | -y | * | | | * | | | * | | | * | | | * +---+---+-------+ * |4x4| | 8x8 | * | -x| | | * | | | | * | | | | * +---+ | -z | * |4x4| | | * | -y| | | * | | | | * +---+ +---+---+---+---+---+---+---+---+---+ * |4x4| |4x4| |2x2| |2x2| |2x2| |2x2| * | +z| | -z| | +x| | +y| | +z| | -x| ... * | | | | | | | | | | | | * +---+ +---+ +---+ +---+ +---+ +---+ * * The bottom row continues with the remaining 2x2 then the 1x1 mip contents * in order, with each of them aligned to a 8x8 block boundary. Thus, for * 32x32 cube maps and smaller, the bottom row layout is going to dictate the * pitch of the tree. For a tree with 4x4 images, the pitch is at least * 14 * 8 = 112 texels, for 2x2 it is at least 12 * 8 texels, and for 1x1 * it is 6 * 8 texels. */ static void i945_miptree_layout_cube(struct intel_mipmap_tree * mt) { const GLuint dim = mt->physical_width0; GLuint face; GLuint lvlWidth = mt->physical_width0, lvlHeight = mt->physical_height0; GLint level; assert(lvlWidth == lvlHeight); /* cubemap images are square */ /* Depending on the size of the largest images, pitch can be * determined either by the old-style packing of cubemap faces, * or the final row of 4x4, 2x2 and 1x1 faces below this. */ if (dim > 32) mt->total_width = dim * 2; else mt->total_width = 14 * 8; if (dim >= 4) mt->total_height = dim * 4 + 4; else mt->total_height = 4; /* Set all the levels to effectively occupy the whole rectangular region. */ for (level = mt->first_level; level <= mt->last_level; level++) { intel_miptree_set_level_info(mt, level, 0, 0, lvlWidth, lvlHeight, 6); lvlWidth /= 2; lvlHeight /= 2; } for (face = 0; face < 6; face++) { GLuint x = initial_offsets[face][0] * dim; GLuint y = initial_offsets[face][1] * dim; GLuint d = dim; if (dim == 4 && face >= 4) { y = mt->total_height - 4; x = (face - 4) * 8; } else if (dim < 4 && (face > 0 || mt->first_level > 0)) { y = mt->total_height - 4; x = face * 8; } for (level = mt->first_level; level <= mt->last_level; level++) { intel_miptree_set_image_offset(mt, level, face, x, y); d >>= 1; switch (d) { case 4: switch (face) { case FACE_POS_X: case FACE_NEG_X: x += step_offsets[face][0] * d; y += step_offsets[face][1] * d; break; case FACE_POS_Y: case FACE_NEG_Y: y += 12; x -= 8; break; case FACE_POS_Z: case FACE_NEG_Z: y = mt->total_height - 4; x = (face - 4) * 8; break; } break; case 2: y = mt->total_height - 4; x = bottom_offsets[face]; break; case 1: x += 48; break; default: x += step_offsets[face][0] * d; y += step_offsets[face][1] * d; break; } } } } static void i945_miptree_layout_3d(struct intel_mipmap_tree * mt) { GLuint width = mt->physical_width0; GLuint height = mt->physical_height0; GLuint depth = mt->physical_depth0; GLuint pack_x_pitch, pack_x_nr; GLuint pack_y_pitch; GLuint level; mt->total_width = mt->physical_width0; mt->total_height = 0; pack_y_pitch = MAX2(mt->physical_height0, 2); pack_x_pitch = mt->total_width; pack_x_nr = 1; for (level = mt->first_level; level <= mt->last_level; level++) { GLint x = 0; GLint y = 0; GLint q, j; intel_miptree_set_level_info(mt, level, 0, mt->total_height, width, height, depth); for (q = 0; q < depth;) { for (j = 0; j < pack_x_nr && q < depth; j++, q++) { intel_miptree_set_image_offset(mt, level, q, x, y); x += pack_x_pitch; } x = 0; y += pack_y_pitch; } mt->total_height += y; if (pack_x_pitch > 4) { pack_x_pitch >>= 1; pack_x_nr <<= 1; assert(pack_x_pitch * pack_x_nr <= mt->total_width); } if (pack_y_pitch > 2) { pack_y_pitch >>= 1; } width = minify(width, 1); height = minify(height, 1); depth = minify(depth, 1); } } void i945_miptree_layout(struct intel_mipmap_tree * mt) { switch (mt->target) { case GL_TEXTURE_CUBE_MAP: if (mt->compressed) i945_miptree_layout_cube(mt); else i915_miptree_layout_cube(mt); break; case GL_TEXTURE_3D: i945_miptree_layout_3d(mt); break; case GL_TEXTURE_1D: case GL_TEXTURE_2D: case GL_TEXTURE_RECTANGLE_ARB: i945_miptree_layout_2d(mt); break; default: _mesa_problem(NULL, "Unexpected tex target in i945_miptree_layout()"); break; } DBG("%s: %dx%dx%d\n", __FUNCTION__, mt->total_width, mt->total_height, mt->cpp); }