Added cache to gpu AA clipping
http://codereview.appspot.com/6160046/
git-svn-id: http://skia.googlecode.com/svn/trunk@3828 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrClipMaskManager.h b/src/gpu/GrClipMaskManager.h
index be6873e..516ec95 100644
--- a/src/gpu/GrClipMaskManager.h
+++ b/src/gpu/GrClipMaskManager.h
@@ -11,9 +11,11 @@
#include "GrRect.h"
#include "SkPath.h"
+#include "GrNoncopyable.h"
+#include "GrClip.h"
+#include "SkRefCnt.h"
class GrGpu;
-class GrClip;
class GrPathRenderer;
class GrPathRendererChain;
class SkPath;
@@ -33,6 +35,57 @@
void setupScissoring(GrGpu* gpu);
};
+/**
+ * The stencil buffer stores the last clip path - providing a single entry
+ * "cache". This class provides similar functionality for AA clip paths
+ */
+class GrClipMaskCache : public GrNoncopyable {
+public:
+ GrClipMaskCache()
+ : fLastWidth(-1)
+ , fLastHeight(-1) {
+ fLastBound.MakeEmpty();
+ }
+
+ bool canReuse(const GrClip& clip, int width, int height) {
+ if (fLastWidth >= width &&
+ fLastHeight >= height &&
+ clip == fLastClip) {
+ return true;
+ }
+
+ return false;
+ }
+
+ void set(const GrClip& clip, int width, int height,
+ GrTexture* mask, const GrRect& bound) {
+
+ fLastWidth = width;
+ fLastHeight = height;
+ fLastClip = clip;
+ SkSafeRef(mask);
+ fLastMask.reset(mask);
+ fLastBound = bound;
+ }
+
+ GrTexture* getLastMask() {
+ return fLastMask.get();
+ }
+
+ const GrRect& getLastBound() const {
+ return fLastBound;
+ }
+
+protected:
+private:
+ int fLastWidth;
+ int fLastHeight;
+ GrClip fLastClip;
+ SkAutoTUnref<GrTexture> fLastMask;
+ GrRect fLastBound;
+
+ typedef GrNoncopyable INHERITED;
+};
/**
* The clip mask creator handles the generation of the clip mask. If anti
@@ -42,7 +95,7 @@
* mask can be represented as a rectangle then scissoring is used. In all
* cases scissoring is used to bound the range of the clip mask.
*/
-class GrClipMaskManager {
+class GrClipMaskManager : public GrNoncopyable {
public:
GrClipMaskManager()
: fClipMaskInStencil(false)
@@ -67,6 +120,7 @@
private:
bool fClipMaskInStencil; // is the clip mask in the stencil buffer?
bool fClipMaskInAlpha; // is the clip mask in an alpha texture?
+ GrClipMaskCache fAACache; // cache for the AA path
// must be instantiated after GrGpu object has been given its owning
// GrContext ptr. (GrGpu is constructed first then handed off to GrContext).
@@ -102,6 +156,7 @@
GrPathFill fill,
bool antiAlias);
+ typedef GrNoncopyable INHERITED;
};
#endif // GrClipMaskManager_DEFINED