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Diffstat (limited to 'src/gallium/auxiliary/util/u_blit.c')
-rw-r--r--src/gallium/auxiliary/util/u_blit.c82
1 files changed, 66 insertions, 16 deletions
diff --git a/src/gallium/auxiliary/util/u_blit.c b/src/gallium/auxiliary/util/u_blit.c
index 414cf91025..cda6dbd46d 100644
--- a/src/gallium/auxiliary/util/u_blit.c
+++ b/src/gallium/auxiliary/util/u_blit.c
@@ -45,6 +45,7 @@
#include "util/u_math.h"
#include "util/u_memory.h"
#include "util/u_simple_shaders.h"
+#include "util/u_surface.h"
#include "cso_cache/cso_context.h"
@@ -155,7 +156,11 @@ util_destroy_blit(struct blit_state *ctx)
}
-static unsigned get_next_slot( struct blit_state *ctx )
+/**
+ * Get offset of next free slot in vertex buffer for quad vertices.
+ */
+static unsigned
+get_next_slot( struct blit_state *ctx )
{
const unsigned max_slots = 4096 / sizeof ctx->vertices;
@@ -173,7 +178,6 @@ static unsigned get_next_slot( struct blit_state *ctx )
}
-
/**
* Setup vertex data for the textured quad we'll draw.
* Note: y=0=top
@@ -260,9 +264,38 @@ setup_vertex_data_tex(struct blit_state *ctx,
return offset;
}
+
+
+/**
+ * \return TRUE if two regions overlap, FALSE otherwise
+ */
+static boolean
+regions_overlap(int srcX0, int srcY0,
+ int srcX1, int srcY1,
+ int dstX0, int dstY0,
+ int dstX1, int dstY1)
+{
+ if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))
+ return FALSE; /* src completely left of dst */
+
+ if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
+ return FALSE; /* dst completely left of src */
+
+ if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
+ return FALSE; /* src completely above dst */
+
+ if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
+ return FALSE; /* dst completely above src */
+
+ return TRUE; /* some overlap */
+}
+
+
/**
* Copy pixel block from src surface to dst surface.
* Overlapping regions are acceptable.
+ * Flipping and stretching are supported.
+ * XXX what about clipping???
* XXX need some control over blitting Z and/or stencil.
*/
void
@@ -285,10 +318,41 @@ util_blit_pixels(struct blit_state *ctx,
const int srcLeft = MIN2(srcX0, srcX1);
const int srcTop = MIN2(srcY0, srcY1);
unsigned offset;
+ boolean overlap;
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_RENDER_TARGET, 0));
+
+ /* do the regions overlap? */
+ overlap = util_same_surface(src, dst) &&
+ regions_overlap(srcX0, srcY0, srcX1, srcY1,
+ dstX0, dstY0, dstX1, dstY1);
+
+ /*
+ * Check for simple case: no format conversion, no flipping, no stretching,
+ * no overlapping.
+ * Filter mode should not matter since there's no stretching.
+ */
+ if (dst->format == src->format &&
+ srcX0 < srcX1 &&
+ dstX0 < dstX1 &&
+ srcY0 < srcY1 &&
+ dstY0 < dstY1 &&
+ (dstX1 - dstX0) == (srcX1 - srcX0) &&
+ (dstY1 - dstY0) == (srcY1 - srcY0) &&
+ !overlap) {
+ 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;
@@ -303,20 +367,6 @@ 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));