For 1-3,
Reviewed-by: Brian Paul <bri...@vmware.com>
On 06/10/2015 04:34 PM, Anuj Phogat wrote:
Signed-off-by: Anuj Phogat <anuj.pho...@gmail.com>
Cc: Ben Widawsky <b...@bwidawsk.net>
---
Jenkins showed no piglit regressions with this series.
src/mesa/main/blit.c | 26 ++++++++++++++++++++++++++
src/mesa/main/blit.h | 6 ++++++
2 files changed, 32 insertions(+)
diff --git a/src/mesa/main/blit.c b/src/mesa/main/blit.c
index db8fee5..4765198 100644
--- a/src/mesa/main/blit.c
+++ b/src/mesa/main/blit.c
@@ -37,6 +37,7 @@
#include "framebuffer.h"
#include "glformats.h"
#include "mtypes.h"
+#include "macros.h"
#include "state.h"
@@ -59,6 +60,31 @@ find_attachment(const struct gl_framebuffer *fb,
/**
+ * \return true if two regions overlap, false otherwise
+ */
+bool
+_mesa_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; /* dst completely right of src */
+
+ if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
+ return false; /* dst completely left of src */
+
+ if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
+ return false; /* dst completely above src */
+
+ if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
+ return false; /* dst completely below src */
+
+ return true; /* some overlap */
+}
+
+
+/**
* Helper function for checking if the datatypes of color buffers are
* compatible for glBlitFramebuffer. From the 3.1 spec, page 198:
*
diff --git a/src/mesa/main/blit.h b/src/mesa/main/blit.h
index 54b946e..88dd4a9 100644
--- a/src/mesa/main/blit.h
+++ b/src/mesa/main/blit.h
@@ -28,6 +28,12 @@
#include "glheader.h"
+extern bool
+_mesa_regions_overlap(int srcX0, int srcY0,
+ int srcX1, int srcY1,
+ int dstX0, int dstY0,
+ int dstX1, int dstY1);
+
extern void
_mesa_blit_framebuffer(struct gl_context *ctx,
struct gl_framebuffer *readFb,
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