1 files changed, 101 insertions, 3 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_surface.c b/src/gallium/drivers/llvmpipe/lp_surface.c
index ca3d62c3613..381c58ecee5 100644
--- a/src/gallium/drivers/llvmpipe/lp_surface.c
+++ b/src/gallium/drivers/llvmpipe/lp_surface.c
@@ -29,16 +29,35 @@
 #include "lp_context.h"
 #include "lp_flush.h"
 #include "lp_surface.h"
+#include "lp_texture.h"
+#include "lp_tile_image.h"
+#include "lp_tile_size.h"
+
+
+/**
+ * Adjust x, y, width, height to lie on tile bounds.
+ */
+static void
+adjust_to_tile_bounds(unsigned x, unsigned y, unsigned width, unsigned height,
+                      unsigned *x_tile, unsigned *y_tile,
+                      unsigned *w_tile, unsigned *h_tile)
+{
+   *x_tile = x & ~(TILE_SIZE - 1);
+   *y_tile = y & ~(TILE_SIZE - 1);
+   *w_tile = ((x + width + TILE_SIZE - 1) & ~(TILE_SIZE - 1)) - *x_tile;
+   *h_tile = ((y + height + TILE_SIZE - 1) & ~(TILE_SIZE - 1)) - *y_tile;
+}
+
 
 
 static void
 lp_surface_copy(struct pipe_context *pipe,
-                struct pipe_surface *dest, unsigned destx, unsigned desty,
+                struct pipe_surface *dst, unsigned dstx, unsigned dsty,
                 struct pipe_surface *src, unsigned srcx, unsigned srcy,
                 unsigned width, unsigned height)
 {
    llvmpipe_flush_texture(pipe,
-                          dest->texture, dest->face, dest->level,
+                          dst->texture, dst->face, dst->level,
                           0, /* flush_flags */
                           FALSE, /* read_only */
                           FALSE, /* cpu_access */
@@ -51,8 +70,87 @@ lp_surface_copy(struct pipe_context *pipe,
                           FALSE, /* cpu_access */
                           FALSE); /* do_not_flush */
 
+   /* Look for special case in which we're copying from a tiled image
+    * to a linear image.
+    */
+   {
+      struct llvmpipe_resource *src_tex = llvmpipe_resource(src->texture);
+      struct llvmpipe_resource *dst_tex = llvmpipe_resource(dst->texture);
+      enum pipe_format format = src_tex->base.format;
+
+      /*
+      printf("surface copy from %u to %u: %u,%u to %u,%u %u x %u\n",
+             src_tex->id, dst_tex->id,
+             srcx, srcy, dstx, dsty, width, height);
+      */
+
+      /* set src tiles to linear layout */
+      {
+         unsigned tx, ty, tw, th;
+         unsigned x, y;
+
+         adjust_to_tile_bounds(srcx, srcy, width, height, &tx, &ty, &tw, &th);
+
+         for (y = 0; y < th; y += TILE_SIZE) {
+            for (x = 0; x < tw; x += TILE_SIZE) {
+               (void) llvmpipe_get_texture_tile_linear(src_tex,
+                                                       src->face, src->level,
+                                                       LP_TEX_USAGE_READ,
+                                                       tx + x, ty + y);
+            }
+         }
+      }
+
+      /* set dst tiles to linear layout */
+      {
+         unsigned tx, ty, tw, th;
+         unsigned x, y;
+         enum lp_texture_usage usage;
+
+         /* XXX for the tiles which are completely contained by the
+          * dest rectangle, we could set the usage mode to WRITE_ALL.
+          * Just test for the case of replacing the whole dest region for now.
+          */
+         if (width == dst_tex->base.width0 && height == dst_tex->base.height0)
+            usage = LP_TEX_USAGE_WRITE_ALL;
+         else
+            usage = LP_TEX_USAGE_READ_WRITE;
+
+         adjust_to_tile_bounds(dstx, dsty, width, height, &tx, &ty, &tw, &th);
+
+         for (y = 0; y < th; y += TILE_SIZE) {
+            for (x = 0; x < tw; x += TILE_SIZE) {
+               (void) llvmpipe_get_texture_tile_linear(dst_tex,
+                                                       dst->face, dst->level,
+                                                       usage,
+                                                       tx + x, ty + y);
+            }
+         }
+      }
+
+      /* copy */
+      {
+         const ubyte *src_linear_ptr
+            = llvmpipe_get_texture_image_address(src_tex, src->face,
+                                                 src->level,
+                                                 LP_TEX_LAYOUT_LINEAR);
+         ubyte *dst_linear_ptr
+            = llvmpipe_get_texture_image_address(dst_tex, dst->face,
+                                                 dst->level,
+                                                 LP_TEX_LAYOUT_LINEAR);
+
+         util_copy_rect(dst_linear_ptr, format,
+                        dst_tex->stride[dst->level],
+                        dstx, dsty,
+                        width, height,
+                        src_linear_ptr, src_tex->stride[src->level],
+                        srcx, srcy);
+      }
+      return;
+   }
+
    util_surface_copy(pipe, FALSE,
-                     dest, destx, desty,
+                     dst, dstx, dsty,
                      src, srcx, srcy,
                      width, height);
 }