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

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2014 Intel Corporation All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Jason Ekstrand <jason.ekstrand@intel.com>
  26  */
  27
  28 #include "intel_tex.h"
  29 #include "intel_blit.h"
  30 #include "intel_mipmap_tree.h"
  31 #include "main/formats.h"
  32 #include "drivers/common/meta.h"
  33
  34 static bool
  35 copy_image_with_blitter(struct brw_context *brw,
  36                         struct intel_mipmap_tree *src_mt, int src_level,
  37                         int src_x, int src_y, int src_z,
  38                         struct intel_mipmap_tree *dst_mt, int dst_level,
  39                         int dst_x, int dst_y, int dst_z,
  40                         int src_width, int src_height)
  41 {
  42    GLuint bw, bh;
  43    int cpp;
  44
  45    /* The blitter doesn't understand multisampling at all. */
  46    if (src_mt->num_samples > 0 || dst_mt->num_samples > 0)
  47       return false;
  48
  49    /* According to the Ivy Bridge PRM, Vol1 Part4, section 1.2.1.2 (Graphics
  50     * Data Size Limitations):
  51     *
  52     *    The BLT engine is capable of transferring very large quantities of
  53     *    graphics data. Any graphics data read from and written to the
  54     *    destination is permitted to represent a number of pixels that
  55     *    occupies up to 65,536 scan lines and up to 32,768 bytes per scan line
  56     *    at the destination. The maximum number of pixels that may be
  57     *    represented per scan line’s worth of graphics data depends on the
  58     *    color depth.
  59     *
  60     * Furthermore, intelEmitCopyBlit (which is called below) uses a signed
  61     * 16-bit integer to represent buffer pitch, so it can only handle buffer
  62     * pitches < 32k.
  63     *
  64     * As a result of these two limitations, we can only use the blitter to do
  65     * this copy when the miptree's pitch is less than 32k.
  66     */
  67    if (src_mt->pitch >= 32768 ||
  68        dst_mt->pitch >= 32768) {
  69       perf_debug("Falling back due to >=32k pitch\n");
  70       return false;
  71    }
  72
  73    if (_mesa_is_format_compressed(src_mt->format)) {
  74       _mesa_get_format_block_size(src_mt->format, &bw, &bh);
  75
  76       assert(src_x % bw == 0);
  77       assert(src_y % bw == 0);
  78       assert(src_width % bw == 0);
  79       assert(src_height % bw == 0);
  80
  81       src_x /= (int)bw;
  82       src_y /= (int)bw;
  83       src_width /= (int)bw;
  84       src_height /= (int)bw;
  85
  86       cpp = _mesa_get_format_bytes(src_mt->format);
  87    } else {
  88       cpp = src_mt->cpp;
  89    }
  90
  91    if (_mesa_is_format_compressed(dst_mt->format)) {
  92       _mesa_get_format_block_size(dst_mt->format, &bw, &bh);
  93
  94       assert(dst_x % bw == 0);
  95       assert(dst_y % bw == 0);
  96
  97       dst_x /= (int)bw;
  98       dst_y /= (int)bw;
  99    }
 100
 101    uint32_t src_image_x, src_image_y;
 102    intel_miptree_get_image_offset(src_mt, src_level, src_z,
 103                                   &src_image_x, &src_image_y);
 104    src_x += src_image_x;
 105    src_y += src_image_y;
 106
 107    uint32_t dst_image_x, dst_image_y;
 108    intel_miptree_get_image_offset(dst_mt, dst_level, dst_z,
 109                                   &dst_image_x, &dst_image_y);
 110    dst_x += dst_image_x;
 111    dst_y += dst_image_y;
 112
 113    return intelEmitCopyBlit(brw,
 114                             cpp,
 115                             src_mt->pitch,
 116                             src_mt->bo, src_mt->offset,
 117                             src_mt->tiling,
 118                             dst_mt->pitch,
 119                             dst_mt->bo, dst_mt->offset,
 120                             dst_mt->tiling,
 121                             src_x, src_y,
 122                             dst_x, dst_y,
 123                             src_width, src_height,
 124                             GL_COPY);
 125 }
 126
 127 static void
 128 copy_image_with_memcpy(struct brw_context *brw,
 129                        struct intel_mipmap_tree *src_mt, int src_level,
 130                        int src_x, int src_y, int src_z,
 131                        struct intel_mipmap_tree *dst_mt, int dst_level,
 132                        int dst_x, int dst_y, int dst_z,
 133                        int src_width, int src_height)
 134 {
 135    bool same_slice;
 136    uint8_t *mapped, *src_mapped, *dst_mapped;
 137    int src_stride, dst_stride, i, cpp;
 138    int map_x1, map_y1, map_x2, map_y2;
 139    GLuint src_bw, src_bh;
 140
 141    cpp = _mesa_get_format_bytes(src_mt->format);
 142    _mesa_get_format_block_size(src_mt->format, &src_bw, &src_bh);
 143
 144    assert(src_width % src_bw == 0);
 145    assert(src_height % src_bw == 0);
 146    assert(src_x % src_bw == 0);
 147    assert(src_y % src_bw == 0);
 148
 149    /* If we are on the same miptree, same level, and same slice, then
 150     * intel_miptree_map won't let us map it twice.  We have to do things a
 151     * bit differently.  In particular, we do a single map large enough for
 152     * both portions and in read-write mode.
 153     */
 154    same_slice = src_mt == dst_mt && src_level == dst_level && src_z == dst_z;
 155
 156    if (same_slice) {
 157       assert(dst_x % src_bw == 0);
 158       assert(dst_y % src_bw == 0);
 159
 160       map_x1 = MIN2(src_x, dst_x);
 161       map_y1 = MIN2(src_y, dst_y);
 162       map_x2 = MAX2(src_x, dst_x) + src_width;
 163       map_y2 = MAX2(src_y, dst_y) + src_height;
 164
 165       intel_miptree_map(brw, src_mt, src_level, src_z,
 166                         map_x1, map_y1, map_x2 - map_x1, map_y2 - map_y1,
 167                         GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
 168                         (void **)&mapped, &src_stride);
 169
 170       dst_stride = src_stride;
 171
 172       /* Set the offsets here so we don't have to think about while looping */
 173       src_mapped = mapped + ((src_y - map_y1) / src_bh) * src_stride +
 174                             ((src_x - map_x1) / src_bw) * cpp;
 175       dst_mapped = mapped + ((dst_y - map_y1) / src_bh) * dst_stride +
 176                             ((dst_x - map_x1) / src_bw) * cpp;
 177    } else {
 178       intel_miptree_map(brw, src_mt, src_level, src_z,
 179                         src_x, src_y, src_width, src_height,
 180                         GL_MAP_READ_BIT, (void **)&src_mapped, &src_stride);
 181       intel_miptree_map(brw, dst_mt, dst_level, dst_z,
 182                         dst_x, dst_y, src_width, src_height,
 183                         GL_MAP_WRITE_BIT, (void **)&dst_mapped, &dst_stride);
 184    }
 185
 186    src_width /= (int)src_bw;
 187    src_height /= (int)src_bh;
 188
 189    for (i = 0; i < src_height; ++i) {
 190       memcpy(dst_mapped, src_mapped, src_width * cpp);
 191       src_mapped += src_stride;
 192       dst_mapped += dst_stride;
 193    }
 194
 195    if (same_slice) {
 196       intel_miptree_unmap(brw, src_mt, src_level, src_z);
 197    } else {
 198       intel_miptree_unmap(brw, dst_mt, dst_level, dst_z);
 199       intel_miptree_unmap(brw, src_mt, src_level, src_z);
 200    }
 201 }
 202
 203 static void
 204 intel_copy_image_sub_data(struct gl_context *ctx,
 205                           struct gl_texture_image *src_image,
 206                           int src_x, int src_y, int src_z,
 207                           struct gl_texture_image *dst_image,
 208                           int dst_x, int dst_y, int dst_z,
 209                           int src_width, int src_height)
 210 {
 211    struct brw_context *brw = brw_context(ctx);
 212    struct intel_texture_image *intel_src_image = intel_texture_image(src_image);
 213    struct intel_texture_image *intel_dst_image = intel_texture_image(dst_image);
 214
 215    if (_mesa_meta_CopyImageSubData_uncompressed(ctx,
 216                                                 src_image, src_x, src_y, src_z,
 217                                                 dst_image, dst_x, dst_y, dst_z,
 218                                                 src_width, src_height)) {
 219       return;
 220    }
 221
 222    if (intel_src_image->mt->num_samples > 0 ||
 223        intel_dst_image->mt->num_samples > 0) {
 224       _mesa_problem(ctx, "Failed to copy multisampled texture with meta path\n");
 225       return;
 226    }
 227
 228    /* Cube maps actually have different images per face */
 229    if (src_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
 230       src_z = src_image->Face;
 231    if (dst_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
 232       dst_z = dst_image->Face;
 233
 234    /* We are now going to try and copy the texture using the blitter.  If
 235     * that fails, we will fall back mapping the texture and using memcpy.
 236     * In either case, we need to do a full resolve.
 237     */
 238    intel_miptree_all_slices_resolve_hiz(brw, intel_src_image->mt);
 239    intel_miptree_all_slices_resolve_depth(brw, intel_src_image->mt);
 240    intel_miptree_resolve_color(brw, intel_src_image->mt);
 241
 242    intel_miptree_all_slices_resolve_hiz(brw, intel_dst_image->mt);
 243    intel_miptree_all_slices_resolve_depth(brw, intel_dst_image->mt);
 244    intel_miptree_resolve_color(brw, intel_dst_image->mt);
 245
 246    if (copy_image_with_blitter(brw, intel_src_image->mt, src_image->Level,
 247                                src_x, src_y, src_z,
 248                                intel_dst_image->mt, src_image->Level,
 249                                dst_x, dst_y, dst_z,
 250                                src_width, src_height))
 251       return;
 252
 253    /* This is a worst-case scenario software fallback that maps the two
 254     * textures and does a memcpy between them.
 255     */
 256    copy_image_with_memcpy(brw, intel_src_image->mt, src_image->Level,
 257                           src_x, src_y, src_z,
 258                           intel_dst_image->mt, src_image->Level,
 259                           dst_x, dst_y, dst_z,
 260                           src_width, src_height);
 261 }
 262
 263 void
 264 intelInitCopyImageFuncs(struct dd_function_table *functions)
 265 {
 266    functions->CopyImageSubData = intel_copy_image_sub_data;
 267 }