src/mesa/drivers/dri/i965/intel_tex_subimage.c

   1 /*
   2  * Copyright 2003 VMware, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "main/bufferobj.h"
  27 #include "main/image.h"
  28 #include "main/macros.h"
  29 #include "main/mtypes.h"
  30 #include "main/pbo.h"
  31 #include "main/texobj.h"
  32 #include "main/texstore.h"
  33 #include "main/texcompress.h"
  34 #include "main/enums.h"
  35 #include "drivers/common/meta.h"
  36
  37 #include "brw_context.h"
  38 #include "intel_batchbuffer.h"
  39 #include "intel_tex.h"
  40 #include "intel_mipmap_tree.h"
  41 #include "intel_blit.h"
  42 #include "intel_tiled_memcpy.h"
  43
  44 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  45
  46 /**
  47  * \brief A fast path for glTexImage and glTexSubImage.
  48  *
  49  * \param for_glTexImage Was this called from glTexImage or glTexSubImage?
  50  *
  51  * This fast path is taken when the texture format is BGRA, RGBA,
  52  * A or L and when the texture memory is X- or Y-tiled.  It uploads
  53  * the texture data by mapping the texture memory without a GTT fence, thus
  54  * acquiring a tiled view of the memory, and then copying sucessive
  55  * spans within each tile.
  56  *
  57  * This is a performance win over the conventional texture upload path because
  58  * it avoids the performance penalty of writing through the write-combine
  59  * buffer. In the conventional texture upload path,
  60  * texstore.c:store_texsubimage(), the texture memory is mapped through a GTT
  61  * fence, thus acquiring a linear view of the memory, then each row in the
  62  * image is memcpy'd. In this fast path, we replace each row's copy with
  63  * a sequence of copies over each linear span in tile.
  64  *
  65  * One use case is Google Chrome's paint rectangles.  Chrome (as
  66  * of version 21) renders each page as a tiling of 256x256 GL_BGRA textures.
  67  * Each page's content is initially uploaded with glTexImage2D and damaged
  68  * regions are updated with glTexSubImage2D. On some workloads, the
  69  * performance gain of this fastpath on Sandybridge is over 5x.
  70  */
  71 bool
  72 intel_texsubimage_tiled_memcpy(struct gl_context * ctx,
  73                                GLuint dims,
  74                                struct gl_texture_image *texImage,
  75                                GLint xoffset, GLint yoffset, GLint zoffset,
  76                                GLsizei width, GLsizei height, GLsizei depth,
  77                                GLenum format, GLenum type,
  78                                const GLvoid *pixels,
  79                                const struct gl_pixelstore_attrib *packing,
  80                                bool for_glTexImage)
  81 {
  82    struct brw_context *brw = brw_context(ctx);
  83    struct intel_texture_image *image = intel_texture_image(texImage);
  84    int src_pitch;
  85
  86    /* The miptree's buffer. */
  87    struct brw_bo *bo;
  88
  89    uint32_t cpp;
  90    mem_copy_fn mem_copy = NULL;
  91
  92    /* This fastpath is restricted to specific texture types:
  93     * a 2D BGRA, RGBA, L8 or A8 texture. It could be generalized to support
  94     * more types.
  95     *
  96     * FINISHME: The restrictions below on packing alignment and packing row
  97     * length are likely unneeded now because we calculate the source stride
  98     * with _mesa_image_row_stride. However, before removing the restrictions
  99     * we need tests.
 100     */
 101    if (!brw->has_llc ||
 102        !(type == GL_UNSIGNED_BYTE || type == GL_UNSIGNED_INT_8_8_8_8_REV) ||
 103        !(texImage->TexObject->Target == GL_TEXTURE_2D ||
 104          texImage->TexObject->Target == GL_TEXTURE_RECTANGLE) ||
 105        pixels == NULL ||
 106        _mesa_is_bufferobj(packing->BufferObj) ||
 107        packing->Alignment > 4 ||
 108        packing->SkipPixels > 0 ||
 109        packing->SkipRows > 0 ||
 110        (packing->RowLength != 0 && packing->RowLength != width) ||
 111        packing->SwapBytes ||
 112        packing->LsbFirst ||
 113        packing->Invert)
 114       return false;
 115
 116    /* Only a simple blit, no scale, bias or other mapping. */
 117    if (ctx->_ImageTransferState)
 118       return false;
 119
 120    if (!intel_get_memcpy(texImage->TexFormat, format, type, &mem_copy, &cpp))
 121       return false;
 122
 123    /* If this is a nontrivial texture view, let another path handle it instead. */
 124    if (texImage->TexObject->MinLayer)
 125       return false;
 126
 127    if (for_glTexImage)
 128       ctx->Driver.AllocTextureImageBuffer(ctx, texImage);
 129
 130    if (!image->mt ||
 131        (image->mt->tiling != I915_TILING_X &&
 132        image->mt->tiling != I915_TILING_Y)) {
 133       /* The algorithm is written only for X- or Y-tiled memory. */
 134       return false;
 135    }
 136
 137    /* linear_to_tiled() assumes that if the object is swizzled, it is using
 138     * I915_BIT6_SWIZZLE_9_10 for X and I915_BIT6_SWIZZLE_9 for Y.  This is only
 139     * true on gen5 and above.
 140     *
 141     * The killer on top is that some gen4 have an L-shaped swizzle mode, where
 142     * parts of the memory aren't swizzled at all. Userspace just can't handle
 143     * that.
 144     */
 145    if (brw->gen < 5 && brw->has_swizzling)
 146       return false;
 147
 148    int level = texImage->Level + texImage->TexObject->MinLevel;
 149
 150    /* Since we are going to write raw data to the miptree, we need to resolve
 151     * any pending fast color clears before we start.
 152     */
 153    assert(image->mt->logical_depth0 == 1);
 154    intel_miptree_access_raw(brw, image->mt, level, 0, true);
 155
 156    bo = image->mt->bo;
 157
 158    if (brw_batch_references(&brw->batch, bo)) {
 159       perf_debug("Flushing before mapping a referenced bo.\n");
 160       intel_batchbuffer_flush(brw);
 161    }
 162
 163    void *map = brw_bo_map(brw, bo, MAP_WRITE | MAP_RAW);
 164    if (map == NULL) {
 165       DBG("%s: failed to map bo\n", __func__);
 166       return false;
 167    }
 168
 169    src_pitch = _mesa_image_row_stride(packing, width, format, type);
 170
 171    /* We postponed printing this message until having committed to executing
 172     * the function.
 173     */
 174    DBG("%s: level=%d offset=(%d,%d) (w,h)=(%d,%d) format=0x%x type=0x%x "
 175        "mesa_format=0x%x tiling=%d "
 176        "packing=(alignment=%d row_length=%d skip_pixels=%d skip_rows=%d) "
 177        "for_glTexImage=%d\n",
 178        __func__, texImage->Level, xoffset, yoffset, width, height,
 179        format, type, texImage->TexFormat, image->mt->tiling,
 180        packing->Alignment, packing->RowLength, packing->SkipPixels,
 181        packing->SkipRows, for_glTexImage);
 182
 183    /* Adjust x and y offset based on miplevel */
 184    xoffset += image->mt->level[level].level_x;
 185    yoffset += image->mt->level[level].level_y;
 186
 187    linear_to_tiled(
 188       xoffset * cpp, (xoffset + width) * cpp,
 189       yoffset, yoffset + height,
 190       map,
 191       pixels - (ptrdiff_t) yoffset * src_pitch - (ptrdiff_t) xoffset * cpp,
 192       image->mt->pitch, src_pitch,
 193       brw->has_swizzling,
 194       image->mt->tiling,
 195       mem_copy
 196    );
 197
 198    brw_bo_unmap(bo);
 199    return true;
 200 }
 201
 202 static void
 203 intelTexSubImage(struct gl_context * ctx,
 204                  GLuint dims,
 205                  struct gl_texture_image *texImage,
 206                  GLint xoffset, GLint yoffset, GLint zoffset,
 207                  GLsizei width, GLsizei height, GLsizei depth,
 208                  GLenum format, GLenum type,
 209                  const GLvoid * pixels,
 210                  const struct gl_pixelstore_attrib *packing)
 211 {
 212    struct intel_mipmap_tree *mt = intel_texture_image(texImage)->mt;
 213    bool ok;
 214
 215    bool tex_busy = mt && brw_bo_busy(mt->bo);
 216
 217    if (mt && mt->format == MESA_FORMAT_S_UINT8)
 218       mt->r8stencil_needs_update = true;
 219
 220    DBG("%s mesa_format %s target %s format %s type %s level %d %dx%dx%d\n",
 221        __func__, _mesa_get_format_name(texImage->TexFormat),
 222        _mesa_enum_to_string(texImage->TexObject->Target),
 223        _mesa_enum_to_string(format), _mesa_enum_to_string(type),
 224        texImage->Level, texImage->Width, texImage->Height, texImage->Depth);
 225
 226    ok = _mesa_meta_pbo_TexSubImage(ctx, dims, texImage,
 227                                    xoffset, yoffset, zoffset,
 228                                    width, height, depth, format, type,
 229                                    pixels, tex_busy, packing);
 230    if (ok)
 231       return;
 232
 233    ok = intel_texsubimage_tiled_memcpy(ctx, dims, texImage,
 234                                        xoffset, yoffset, zoffset,
 235                                        width, height, depth,
 236                                        format, type, pixels, packing,
 237                                        false /*for_glTexImage*/);
 238    if (ok)
 239      return;
 240
 241    _mesa_store_texsubimage(ctx, dims, texImage,
 242                            xoffset, yoffset, zoffset,
 243                            width, height, depth,
 244                            format, type, pixels, packing);
 245 }
 246
 247 void
 248 intelInitTextureSubImageFuncs(struct dd_function_table *functions)
 249 {
 250    functions->TexSubImage = intelTexSubImage;
 251 }