/**************************************************************************
*
* 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 "brw_context.h"
#include "intel_batchbuffer.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 brw_context *brw = brw_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 (brw->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(brw, 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(brw, 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(brw, temp_mt);
bool ret;
ret = intel_miptree_blit(brw,
temp_mt, 0, 0,
0, 0, false,
intelImage->mt, texImage->Level, texImage->Face,
xoffset, yoffset, false,
width, height, GL_COPY);
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 brw_context *brw = brw_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 (!brw->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(brw, image->mt);
bo = image->mt->region->bo;
if (drm_intel_bo_references(brw->batch.bo, bo)) {
perf_debug("Flushing before mapping a referenced bo.\n");
intel_batchbuffer_flush(brw);
}
if (unlikely(brw->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 (brw->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;
}