plumbing for GPU fast blur

src/gpu/SkGpuDevice.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGpuDevice.h"
 
 #include "effects/GrBicubicEffect.h"
 #include "effects/GrTextureDomain.h"
 #include "effects/GrSimpleTextureEffect.h"
 
 #include "GrContext.h"
 #include "GrBitmapTextContext.h"
 #if SK_DISTANCEFIELD_FONTS
 #include "GrDistanceFieldTextContext.h"
 #endif
 
 #include "SkGrTexturePixelRef.h"
 
+#include "SkBounder.h"
 #include "SkColorFilter.h"
 #include "SkDeviceImageFilterProxy.h"
 #include "SkDrawProcs.h"
 #include "SkGlyphCache.h"
 #include "SkImageFilter.h"
+#include "SkMaskFilter.h"
 #include "SkPathEffect.h"
 #include "SkRRect.h"
 #include "SkStroke.h"
 #include "SkSurface.h"
 #include "SkTLazy.h"
 #include "SkUtils.h"
 #include "SkErrorInternals.h"
 
 #define CACHE_COMPATIBLE_DEVICE_TEXTURES 1
 
@@ skipping 695 matching lines @@
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 void SkGpuDevice::drawRRect(const SkDraw& draw, const SkRRect& rect,
                            const SkPaint& paint) {
     CHECK_FOR_ANNOTATION(paint);
     CHECK_SHOULD_DRAW(draw, false);
 
+    GrPaint grPaint;
+    if (!skPaint2GrPaintShader(this, paint, true, &grPaint)) {
+        return;
+    }
+
+    SkStrokeRec stroke(paint);
+    if (paint.getMaskFilter()) {
+        // try to hit the fast path for drawing filtered round rects
+
+        SkRRect devRRect;
+        if (rect.transform(fContext->getMatrix(), &devRRect)) {
+            if (devRRect.allCornersCircular()) {
+                SkRect maskRect;
+                if (paint.getMaskFilter()->canFilterMaskGPU(devRRect.rect(),
+                                            draw.fClip->getBounds(),
+                                            fContext->getMatrix(),
+                                            &maskRect)) {
+                    SkIRect finalIRect;
+                    maskRect.roundOut(&finalIRect);
+                    if (draw.fClip->quickReject(finalIRect)) {
+                        // clipped out
+                        return;
+                    }
+                    if (NULL != draw.fBounder && !draw.fBounder->doIRect(finalIRect)) {
+                        // nothing to draw
+                        return;
+                    }
+                    if (paint.getMaskFilter()->directFilterRRectMaskGPU(fContext, &grPaint,
+                                                                        stroke, devRRect)) {
+                        return;
+                    }
+                }
+
+            }
+        }
+
+    }
+
     bool usePath = !rect.isSimple();
     // another two reasons we might need to call drawPath...
     if (paint.getMaskFilter() || paint.getPathEffect()) {
         usePath = true;
     }
     // until we can rotate rrects...
     if (!usePath && !fContext->getMatrix().rectStaysRect()) {
         usePath = true;
     }
 
     if (usePath) {
         SkPath path;
         path.addRRect(rect);
         this->drawPath(draw, path, paint, NULL, true);
         return;
     }
 
-    GrPaint grPaint;
-    if (!skPaint2GrPaintShader(this, paint, true, &grPaint)) {
-        return;
-    }
-
-    SkStrokeRec stroke(paint);
     fContext->drawRRect(grPaint, rect, stroke);
 }
 
-///////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////
 
 void SkGpuDevice::drawOval(const SkDraw& draw, const SkRect& oval,
                            const SkPaint& paint) {
     CHECK_FOR_ANNOTATION(paint);
     CHECK_SHOULD_DRAW(draw, false);
 
     bool usePath = false;
     // some basic reasons we might need to call drawPath...
     if (paint.getMaskFilter() || paint.getPathEffect()) {
         usePath = true;
@@ skipping 225 matching lines @@
             if (draw.fClip->quickReject(finalIRect)) {
                 // clipped out
                 return;
             }
             if (NULL != draw.fBounder && !draw.fBounder->doIRect(finalIRect)) {
                 // nothing to draw
                 return;
             }
 
             if (paint.getMaskFilter()->directFilterMaskGPU(fContext, &grPaint,
-                                                           SkStrokeRec(paint), *devPathPtr)) {
+                                                           stroke, *devPathPtr)) {
                 // the mask filter was able to draw itself directly, so there's nothing
                 // left to do.
                 return;
             }
 
             GrAutoScratchTexture mask;
 
             if (create_mask_GPU(fContext, maskRect, *devPathPtr, stroke,
                                 grPaint.isAntiAlias(), &mask)) {
                 GrTexture* filtered;
@@ skipping 945 matching lines @@
                          GrTexture* texture,
                          bool needClear)
     : SkBitmapDevice(make_bitmap(context, texture->asRenderTarget())) {
 
     SkASSERT(texture && texture->asRenderTarget());
     // This constructor is called from onCreateDevice. It has locked the RT in the texture
     // cache. We pass true for the third argument so that it will get unlocked.
     this->initFromRenderTarget(context, texture->asRenderTarget(), true);
     fNeedClear = needClear;
 }