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-rw-r--r--src/gallium/auxiliary/util/u_blit.c40
1 files changed, 24 insertions, 16 deletions
diff --git a/src/gallium/auxiliary/util/u_blit.c b/src/gallium/auxiliary/util/u_blit.c
index 261a9b6c90..bc90813719 100644
--- a/src/gallium/auxiliary/util/u_blit.c
+++ b/src/gallium/auxiliary/util/u_blit.c
@@ -268,6 +268,7 @@ setup_vertex_data_tex(struct blit_state *ctx,
/**
* Copy pixel block from src surface to dst surface.
* Overlapping regions are acceptable.
+ * Flipping and stretching are supported.
* XXX need some control over blitting Z and/or stencil.
*/
void
@@ -294,6 +295,29 @@ util_blit_pixels(struct blit_state *ctx,
assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
filter == PIPE_TEX_MIPFILTER_LINEAR);
+ assert(screen->is_format_supported(screen, src->format, PIPE_TEXTURE_2D,
+ PIPE_TEXTURE_USAGE_SAMPLER, 0));
+ assert(screen->is_format_supported(screen, dst->format, PIPE_TEXTURE_2D,
+ PIPE_TEXTURE_USAGE_SAMPLER, 0));
+
+ /*
+ * Check for simple case: no format conversion, no flipping, no stretching.
+ */
+ if (dst->format == src->format &&
+ srcX0 < srcX1 &&
+ dstX0 < dstX1 &&
+ srcY0 < srcY1 &&
+ dstY0 < dstY1 &&
+ (dstX1 - dstX0) == (srcX1 - srcX0) &&
+ (dstY1 - dstY0) == (srcY1 - srcY0)) {
+ /* FIXME: this will most surely fail for overlapping rectangles */
+ pipe->surface_copy(pipe,
+ dst, dstX0, dstY0, /* dest */
+ src, srcX0, srcY0, /* src */
+ srcW, srcH); /* size */
+ return;
+ }
+
if (srcLeft != srcX0) {
/* left-right flip */
int tmp = dstX0;
@@ -308,22 +332,6 @@ util_blit_pixels(struct blit_state *ctx,
dstY1 = tmp;
}
- assert(screen->is_format_supported(screen, src->format, PIPE_TEXTURE_2D,
- PIPE_TEXTURE_USAGE_SAMPLER, 0));
- assert(screen->is_format_supported(screen, dst->format, PIPE_TEXTURE_2D,
- PIPE_TEXTURE_USAGE_SAMPLER, 0));
-
- if (dst->format == src->format &&
- (dstX1 - dstX0) == srcW &&
- (dstY1 - dstY0) == srcH) {
- /* FIXME: this will most surely fail for overlapping rectangles */
- pipe->surface_copy(pipe,
- dst, dstX0, dstY0, /* dest */
- src, srcX0, srcY0, /* src */
- srcW, srcH); /* size */
- return;
- }
-
assert(screen->is_format_supported(screen, dst->format, PIPE_TEXTURE_2D,
PIPE_TEXTURE_USAGE_RENDER_TARGET, 0));