--- /dev/null
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2014 Intel Corporation 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, sublicense,
+ * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ * Authors:
+ * Jason Ekstrand <jason.ekstrand@intel.com>
+ */
+
+#include "intel_tex.h"
+#include "intel_blit.h"
+#include "intel_mipmap_tree.h"
+#include "main/formats.h"
+#include "drivers/common/meta.h"
+
+static bool
+copy_image_with_blitter(struct brw_context *brw,
+ struct intel_mipmap_tree *src_mt, int src_level,
+ int src_x, int src_y, int src_z,
+ struct intel_mipmap_tree *dst_mt, int dst_level,
+ int dst_x, int dst_y, int dst_z,
+ int src_width, int src_height)
+{
+ GLuint bw, bh;
+ int cpp;
+
+ /* The blitter doesn't understand multisampling at all. */
+ if (src_mt->num_samples > 0 || dst_mt->num_samples > 0)
+ return false;
+
+ /* According to the Ivy Bridge PRM, Vol1 Part4, section 1.2.1.2 (Graphics
+ * Data Size Limitations):
+ *
+ * The BLT engine is capable of transferring very large quantities of
+ * graphics data. Any graphics data read from and written to the
+ * destination is permitted to represent a number of pixels that
+ * occupies up to 65,536 scan lines and up to 32,768 bytes per scan line
+ * at the destination. The maximum number of pixels that may be
+ * represented per scan line’s worth of graphics data depends on the
+ * color depth.
+ *
+ * Furthermore, intelEmitCopyBlit (which is called below) uses a signed
+ * 16-bit integer to represent buffer pitch, so it can only handle buffer
+ * pitches < 32k.
+ *
+ * As a result of these two limitations, we can only use the blitter to do
+ * this copy when the miptree's pitch is less than 32k.
+ */
+ if (src_mt->pitch >= 32768 ||
+ dst_mt->pitch >= 32768) {
+ perf_debug("Falling back due to >=32k pitch\n");
+ return false;
+ }
+
+ if (_mesa_is_format_compressed(src_mt->format)) {
+ _mesa_get_format_block_size(src_mt->format, &bw, &bh);
+
+ assert(src_x % bw == 0);
+ assert(src_y % bw == 0);
+ assert(src_width % bw == 0);
+ assert(src_height % bw == 0);
+
+ src_x /= (int)bw;
+ src_y /= (int)bw;
+ src_width /= (int)bw;
+ src_height /= (int)bw;
+
+ cpp = _mesa_get_format_bytes(src_mt->format);
+ } else {
+ cpp = src_mt->cpp;
+ }
+
+ if (_mesa_is_format_compressed(dst_mt->format)) {
+ _mesa_get_format_block_size(dst_mt->format, &bw, &bh);
+
+ assert(dst_x % bw == 0);
+ assert(dst_y % bw == 0);
+
+ dst_x /= (int)bw;
+ dst_y /= (int)bw;
+ }
+
+ uint32_t src_image_x, src_image_y;
+ intel_miptree_get_image_offset(src_mt, src_level, src_z,
+ &src_image_x, &src_image_y);
+ src_x += src_image_x;
+ src_y += src_image_y;
+
+ uint32_t dst_image_x, dst_image_y;
+ intel_miptree_get_image_offset(dst_mt, dst_level, dst_z,
+ &dst_image_x, &dst_image_y);
+ dst_x += dst_image_x;
+ dst_y += dst_image_y;
+
+ return intelEmitCopyBlit(brw,
+ cpp,
+ src_mt->pitch,
+ src_mt->bo, src_mt->offset,
+ src_mt->tiling,
+ dst_mt->pitch,
+ dst_mt->bo, dst_mt->offset,
+ dst_mt->tiling,
+ src_x, src_y,
+ dst_x, dst_y,
+ src_width, src_height,
+ GL_COPY);
+}
+
+static void
+copy_image_with_memcpy(struct brw_context *brw,
+ struct intel_mipmap_tree *src_mt, int src_level,
+ int src_x, int src_y, int src_z,
+ struct intel_mipmap_tree *dst_mt, int dst_level,
+ int dst_x, int dst_y, int dst_z,
+ int src_width, int src_height)
+{
+ bool same_slice;
+ uint8_t *mapped, *src_mapped, *dst_mapped;
+ int src_stride, dst_stride, i, cpp;
+ int map_x1, map_y1, map_x2, map_y2;
+ GLuint src_bw, src_bh;
+
+ cpp = _mesa_get_format_bytes(src_mt->format);
+ _mesa_get_format_block_size(src_mt->format, &src_bw, &src_bh);
+
+ assert(src_width % src_bw == 0);
+ assert(src_height % src_bw == 0);
+ assert(src_x % src_bw == 0);
+ assert(src_y % src_bw == 0);
+
+ /* If we are on the same miptree, same level, and same slice, then
+ * intel_miptree_map won't let us map it twice. We have to do things a
+ * bit differently. In particular, we do a single map large enough for
+ * both portions and in read-write mode.
+ */
+ same_slice = src_mt == dst_mt && src_level == dst_level && src_z == dst_z;
+
+ if (same_slice) {
+ assert(dst_x % src_bw == 0);
+ assert(dst_y % src_bw == 0);
+
+ map_x1 = MIN2(src_x, dst_x);
+ map_y1 = MIN2(src_y, dst_y);
+ map_x2 = MAX2(src_x, dst_x) + src_width;
+ map_y2 = MAX2(src_y, dst_y) + src_height;
+
+ intel_miptree_map(brw, src_mt, src_level, src_z,
+ map_x1, map_y1, map_x2 - map_x1, map_y2 - map_y1,
+ GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
+ (void **)&mapped, &src_stride);
+
+ dst_stride = src_stride;
+
+ /* Set the offsets here so we don't have to think about while looping */
+ src_mapped = mapped + ((src_y - map_y1) / src_bh) * src_stride +
+ ((src_x - map_x1) / src_bw) * cpp;
+ dst_mapped = mapped + ((dst_y - map_y1) / src_bh) * dst_stride +
+ ((dst_x - map_x1) / src_bw) * cpp;
+ } else {
+ intel_miptree_map(brw, src_mt, src_level, src_z,
+ src_x, src_y, src_width, src_height,
+ GL_MAP_READ_BIT, (void **)&src_mapped, &src_stride);
+ intel_miptree_map(brw, dst_mt, dst_level, dst_z,
+ dst_x, dst_y, src_width, src_height,
+ GL_MAP_WRITE_BIT, (void **)&dst_mapped, &dst_stride);
+ }
+
+ src_width /= (int)src_bw;
+ src_height /= (int)src_bh;
+
+ for (i = 0; i < src_height; ++i) {
+ memcpy(dst_mapped, src_mapped, src_width * cpp);
+ src_mapped += src_stride;
+ dst_mapped += dst_stride;
+ }
+
+ if (same_slice) {
+ intel_miptree_unmap(brw, src_mt, src_level, src_z);
+ } else {
+ intel_miptree_unmap(brw, dst_mt, dst_level, dst_z);
+ intel_miptree_unmap(brw, src_mt, src_level, src_z);
+ }
+}
+
+static void
+intel_copy_image_sub_data(struct gl_context *ctx,
+ struct gl_texture_image *src_image,
+ int src_x, int src_y, int src_z,
+ struct gl_texture_image *dst_image,
+ int dst_x, int dst_y, int dst_z,
+ int src_width, int src_height)
+{
+ struct brw_context *brw = brw_context(ctx);
+ struct intel_texture_image *intel_src_image = intel_texture_image(src_image);
+ struct intel_texture_image *intel_dst_image = intel_texture_image(dst_image);
+
+ if (_mesa_meta_CopyImageSubData_uncompressed(ctx,
+ src_image, src_x, src_y, src_z,
+ dst_image, dst_x, dst_y, dst_z,
+ src_width, src_height)) {
+ return;
+ }
+
+ if (intel_src_image->mt->num_samples > 0 ||
+ intel_dst_image->mt->num_samples > 0) {
+ _mesa_problem(ctx, "Failed to copy multisampled texture with meta path\n");
+ return;
+ }
+
+ /* Cube maps actually have different images per face */
+ if (src_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
+ src_z = src_image->Face;
+ if (dst_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
+ dst_z = dst_image->Face;
+
+ /* We are now going to try and copy the texture using the blitter. If
+ * that fails, we will fall back mapping the texture and using memcpy.
+ * In either case, we need to do a full resolve.
+ */
+ intel_miptree_all_slices_resolve_hiz(brw, intel_src_image->mt);
+ intel_miptree_all_slices_resolve_depth(brw, intel_src_image->mt);
+ intel_miptree_resolve_color(brw, intel_src_image->mt);
+
+ intel_miptree_all_slices_resolve_hiz(brw, intel_dst_image->mt);
+ intel_miptree_all_slices_resolve_depth(brw, intel_dst_image->mt);
+ intel_miptree_resolve_color(brw, intel_dst_image->mt);
+
+ if (copy_image_with_blitter(brw, intel_src_image->mt, src_image->Level,
+ src_x, src_y, src_z,
+ intel_dst_image->mt, src_image->Level,
+ dst_x, dst_y, dst_z,
+ src_width, src_height))
+ return;
+
+ /* This is a worst-case scenario software fallback that maps the two
+ * textures and does a memcpy between them.
+ */
+ copy_image_with_memcpy(brw, intel_src_image->mt, src_image->Level,
+ src_x, src_y, src_z,
+ intel_dst_image->mt, src_image->Level,
+ dst_x, dst_y, dst_z,
+ src_width, src_height);
+}
+
+void
+intelInitCopyImageFuncs(struct dd_function_table *functions)
+{
+ functions->CopyImageSubData = intel_copy_image_sub_data;
+}
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