#include "framebuffer.h"
#include "glformats.h"
#include "mtypes.h"
+#include "macros.h"
#include "state.h"
/**
+ * \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:
*
#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,