diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/intel_tex_subimage.c')
| -rw-r--r--[l---------] | src/mesa/drivers/dri/i965/intel_tex_subimage.c | 336 |
1 files changed, 335 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/i965/intel_tex_subimage.c b/src/mesa/drivers/dri/i965/intel_tex_subimage.c index b3a8a3d..f936e9b 120000..100644 --- a/src/mesa/drivers/dri/i965/intel_tex_subimage.c +++ b/src/mesa/drivers/dri/i965/intel_tex_subimage.c @@ -1 +1,335 @@ -../intel/intel_tex_subimage.c
\ No newline at end of file + +/************************************************************************** + * + * Copyright 2003 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. + * + **************************************************************************/ + +#include "main/bufferobj.h" +#include "main/macros.h" +#include "main/mtypes.h" +#include "main/pbo.h" +#include "main/texobj.h" +#include "main/texstore.h" +#include "main/texcompress.h" +#include "main/enums.h" + +#include "intel_batchbuffer.h" +#include "intel_context.h" +#include "intel_tex.h" +#include "intel_mipmap_tree.h" +#include "intel_blit.h" + +#define FILE_DEBUG_FLAG DEBUG_TEXTURE + +static bool +intel_blit_texsubimage(struct gl_context * ctx, + struct gl_texture_image *texImage, + GLint xoffset, GLint yoffset, + GLint width, GLint height, + GLenum format, GLenum type, const void *pixels, + const struct gl_pixelstore_attrib *packing) +{ + struct intel_context *intel = intel_context(ctx); + struct intel_texture_image *intelImage = intel_texture_image(texImage); + + /* Try to do a blit upload of the subimage if the texture is + * currently busy. + */ + if (!intelImage->mt) + return false; + + /* The blitter can't handle Y tiling */ + if (intelImage->mt->region->tiling == I915_TILING_Y) + return false; + + if (texImage->TexObject->Target != GL_TEXTURE_2D) + return false; + + /* On gen6, it's probably not worth swapping to the blit ring to do + * this because of all the overhead involved. + */ + if (intel->gen >= 6) + return false; + + if (!drm_intel_bo_busy(intelImage->mt->region->bo)) + return false; + + DBG("BLT subimage %s target %s level %d offset %d,%d %dx%d\n", + __FUNCTION__, + _mesa_lookup_enum_by_nr(texImage->TexObject->Target), + texImage->Level, xoffset, yoffset, width, height); + + pixels = _mesa_validate_pbo_teximage(ctx, 2, width, height, 1, + format, type, pixels, packing, + "glTexSubImage"); + if (!pixels) + return false; + + struct intel_mipmap_tree *temp_mt = + intel_miptree_create(intel, GL_TEXTURE_2D, texImage->TexFormat, + 0, 0, + width, height, 1, + false, 0, INTEL_MIPTREE_TILING_NONE); + if (!temp_mt) + goto err; + + GLubyte *dst = intel_miptree_map_raw(intel, temp_mt); + if (!dst) + goto err; + + if (!_mesa_texstore(ctx, 2, texImage->_BaseFormat, + texImage->TexFormat, + temp_mt->region->pitch, + &dst, + width, height, 1, + format, type, pixels, packing)) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "intelTexSubImage"); + } + + intel_miptree_unmap_raw(intel, temp_mt); + + bool ret; + + ret = intel_miptree_blit(intel, + temp_mt, 0, 0, + 0, 0, false, + intelImage->mt, texImage->Level, texImage->Face, + xoffset, yoffset, false, + width, height, GL_COPY); + assert(ret); + + intel_miptree_release(&temp_mt); + _mesa_unmap_teximage_pbo(ctx, packing); + + return ret; + +err: + _mesa_error(ctx, GL_OUT_OF_MEMORY, "intelTexSubImage"); + intel_miptree_release(&temp_mt); + _mesa_unmap_teximage_pbo(ctx, packing); + return false; +} + +/** + * \brief A fast path for glTexImage and glTexSubImage. + * + * \param for_glTexImage Was this called from glTexImage or glTexSubImage? + * + * This fast path is taken when the hardware natively supports the texture + * format (such as GL_BGRA) and when the texture memory is X-tiled. It uploads + * the texture data by mapping the texture memory without a GTT fence, thus + * acquiring a tiled view of the memory, and then memcpy'ing sucessive + * subspans within each tile. + * + * This is a performance win over the conventional texture upload path because + * it avoids the performance penalty of writing through the write-combine + * buffer. In the conventional texture upload path, + * texstore.c:store_texsubimage(), the texture memory is mapped through a GTT + * fence, thus acquiring a linear view of the memory, then each row in the + * image is memcpy'd. In this fast path, we replace each row's memcpy with + * a sequence of memcpy's over each bit6 swizzle span in the row. + * + * This fast path's use case is Google Chrome's paint rectangles. Chrome (as + * of version 21) renders each page as a tiling of 256x256 GL_BGRA textures. + * Each page's content is initially uploaded with glTexImage2D and damaged + * regions are updated with glTexSubImage2D. On some workloads, the + * performance gain of this fastpath on Sandybridge is over 5x. + */ +bool +intel_texsubimage_tiled_memcpy(struct gl_context * ctx, + GLuint dims, + struct gl_texture_image *texImage, + GLint xoffset, GLint yoffset, GLint zoffset, + GLsizei width, GLsizei height, GLsizei depth, + GLenum format, GLenum type, + const GLvoid *pixels, + const struct gl_pixelstore_attrib *packing, + bool for_glTexImage) +{ + struct intel_context *intel = intel_context(ctx); + struct intel_texture_image *image = intel_texture_image(texImage); + + /* The miptree's buffer. */ + drm_intel_bo *bo; + + int error = 0; + + /* This fastpath is restricted to a specific texture type: level 0 of + * a 2D BGRA texture. It could be generalized to support more types by + * varying the arithmetic loop below. + */ + if (!intel->has_llc || + format != GL_BGRA || + type != GL_UNSIGNED_BYTE || + texImage->TexFormat != MESA_FORMAT_ARGB8888 || + texImage->TexObject->Target != GL_TEXTURE_2D || + texImage->Level != 0 || + pixels == NULL || + _mesa_is_bufferobj(packing->BufferObj) || + packing->Alignment > 4 || + packing->SkipPixels > 0 || + packing->SkipRows > 0 || + (packing->RowLength != 0 && packing->RowLength != width) || + packing->SwapBytes || + packing->LsbFirst || + packing->Invert) + return false; + + if (for_glTexImage) + ctx->Driver.AllocTextureImageBuffer(ctx, texImage); + + if (!image->mt || + image->mt->region->tiling != I915_TILING_X) { + /* The algorithm below is written only for X-tiled memory. */ + return false; + } + + /* Since we are going to write raw data to the miptree, we need to resolve + * any pending fast color clears before we start. + */ + intel_miptree_resolve_color(intel, image->mt); + + bo = image->mt->region->bo; + + if (drm_intel_bo_references(intel->batch.bo, bo)) { + perf_debug("Flushing before mapping a referenced bo.\n"); + intel_batchbuffer_flush(intel); + } + + if (unlikely(intel->perf_debug)) { + if (drm_intel_bo_busy(bo)) { + perf_debug("Mapping a busy BO, causing a stall on the GPU.\n"); + } + } + + error = drm_intel_bo_map(bo, true /*write_enable*/); + if (error || bo->virtual == NULL) { + DBG("%s: failed to map bo\n", __FUNCTION__); + return false; + } + + /* We postponed printing this message until having committed to executing + * the function. + */ + DBG("%s: level=%d offset=(%d,%d) (w,h)=(%d,%d)\n", + __FUNCTION__, texImage->Level, xoffset, yoffset, width, height); + + /* In the tiling algorithm below, some variables are in units of pixels, + * others are in units of bytes, and others (such as height) are unitless. + * Each variable name is suffixed with its units. + */ + + const uint32_t x_max_pixels = xoffset + width; + const uint32_t y_max_pixels = yoffset + height; + + const uint32_t tile_size_bytes = 4096; + + const uint32_t tile_width_bytes = 512; + const uint32_t tile_width_pixels = 128; + + const uint32_t tile_height = 8; + + const uint32_t cpp = 4; /* chars per pixel of GL_BGRA */ + const uint32_t swizzle_width_pixels = 16; + + const uint32_t stride_bytes = image->mt->region->pitch; + const uint32_t width_tiles = stride_bytes / tile_width_bytes; + + for (uint32_t y_pixels = yoffset; y_pixels < y_max_pixels; ++y_pixels) { + const uint32_t y_offset_bytes = (y_pixels / tile_height) * width_tiles * tile_size_bytes + + (y_pixels % tile_height) * tile_width_bytes; + + for (uint32_t x_pixels = xoffset; x_pixels < x_max_pixels; x_pixels += swizzle_width_pixels) { + const uint32_t x_offset_bytes = (x_pixels / tile_width_pixels) * tile_size_bytes + + (x_pixels % tile_width_pixels) * cpp; + + intptr_t offset_bytes = y_offset_bytes + x_offset_bytes; + if (intel->has_swizzling) { +#if 0 + /* Clear, unoptimized version. */ + bool bit6 = (offset_bytes >> 6) & 1; + bool bit9 = (offset_bytes >> 9) & 1; + bool bit10 = (offset_bytes >> 10) & 1; + + if (bit9 ^ bit10) + offset_bytes ^= (1 << 6); +#else + /* Optimized, obfuscated version. */ + offset_bytes ^= ((offset_bytes >> 3) ^ (offset_bytes >> 4)) + & (1 << 6); +#endif + } + + const uint32_t swizzle_bound_pixels = ALIGN(x_pixels + 1, swizzle_width_pixels); + const uint32_t memcpy_bound_pixels = MIN2(x_max_pixels, swizzle_bound_pixels); + const uint32_t copy_size = cpp * (memcpy_bound_pixels - x_pixels); + + memcpy(bo->virtual + offset_bytes, pixels, copy_size); + pixels += copy_size; + x_pixels -= (x_pixels % swizzle_width_pixels); + } + } + + drm_intel_bo_unmap(bo); + return true; +} + +static void +intelTexSubImage(struct gl_context * ctx, + GLuint dims, + struct gl_texture_image *texImage, + GLint xoffset, GLint yoffset, GLint zoffset, + GLsizei width, GLsizei height, GLsizei depth, + GLenum format, GLenum type, + const GLvoid * pixels, + const struct gl_pixelstore_attrib *packing) +{ + bool ok; + + ok = intel_texsubimage_tiled_memcpy(ctx, dims, texImage, + xoffset, yoffset, zoffset, + width, height, depth, + format, type, pixels, packing, + false /*for_glTexImage*/); + if (ok) + return; + + /* The intel_blit_texsubimage() function only handles 2D images */ + if (dims != 2 || !intel_blit_texsubimage(ctx, texImage, + xoffset, yoffset, + width, height, + format, type, pixels, packing)) { + _mesa_store_texsubimage(ctx, dims, texImage, + xoffset, yoffset, zoffset, + width, height, depth, + format, type, pixels, packing); + } +} + +void +intelInitTextureSubImageFuncs(struct dd_function_table *functions) +{ + functions->TexSubImage = intelTexSubImage; +} |