SkPatchGrid interface (after SkPatch/SkPicture rebase).

gm/meshgradient.cpp

 
 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // This test only works with the GPU backend.
 
 #include "gm.h"
 
 #if SK_SUPPORT_GPU
 
 #include "GrContext.h"
 #include "GrTest.h"
-#include "SkPatch.h"
+
+#include "../src/effects/gradients/SkMeshGradient.h"
 
 static void draw_control_points(SkCanvas* canvas, const SkPatch& patch) {
     //draw control points
     SkPaint paint;
-    SkPoint bottom[SkPatch::kNumPtsCubic];
+    SkPoint bottom[4];
     patch.getBottomPoints(bottom);
-    SkPoint top[SkPatch::kNumPtsCubic];
+    SkPoint top[4];
     patch.getTopPoints(top);
-    SkPoint left[SkPatch::kNumPtsCubic];
+    SkPoint left[4];
     patch.getLeftPoints(left);
-    SkPoint right[SkPatch::kNumPtsCubic];
+    SkPoint right[4];
     patch.getRightPoints(right);
 
     paint.setColor(SK_ColorBLACK);
     paint.setStrokeWidth(0.5);
     SkPoint corners[4] = { bottom[0], bottom[3], top[0], top[3] };
     canvas->drawPoints(SkCanvas::kLines_PointMode, 4, bottom, paint);
     canvas->drawPoints(SkCanvas::kLines_PointMode, 2, bottom+1, paint);
     canvas->drawPoints(SkCanvas::kLines_PointMode, 4, top, paint);
     canvas->drawPoints(SkCanvas::kLines_PointMode, 4, left, paint);
     canvas->drawPoints(SkCanvas::kLines_PointMode, 4, right, paint);
@@ skipping 15 matching lines @@
 
     paint.setColor(SK_ColorYELLOW);
     canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, left+1, paint);
 
     paint.setColor(SK_ColorGREEN);
     canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, right+1, paint);
 }
 
 namespace skiagm {
 /**
- * This GM draws a SkPatch.
+ * This GM draws a mesh gradient.
  */
-class SkPatchGM : public GM {
+class SkMeshGradientGM : public GM {
     
 public:
-    SkPatchGM() {
+    SkMeshGradientGM() {
         this->setBGColor(0xFFFFFFFF);
     }
 
 protected:
     virtual SkString onShortName() SK_OVERRIDE {
-        return SkString("patch_primitive");
+        return SkString("mesh_gradient");
     }
 
     virtual SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(800, 800);
     }
 
     virtual uint32_t onGetFlags() const SK_OVERRIDE {
         return kSkipTiled_Flag;
     }
-    
+
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
-        
+
         SkPaint paint;
         
-        // The order of the colors and points is clockwise starting at upper-left corner.
-        SkColor colors[SkPatch::kNumColors] = {
-            SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorCYAN
-        };
-        SkPoint points[SkPatch::kNumCtrlPts] = {
-            //top points
-            {50,50},{75,20},{125,80}, {150,50},
-            //right points
-            {120,75},{180,125},
-            //bottom points
-            {150,150},{125,120},{75,180},{50,150},
-            //left points
-            {20,125},{80,75}
+        SkPoint vertices[] = {
+            {50,50}, {150,50}, {250,50},
+            {50,150}, {160,140}, {250,150},
+            {50,250}, {170,460}, {250,250}
         };
         
-        SkPatch patch(points, colors);
-        static const SkScalar kScale = 0.5f;
-        canvas->translate(100, 100);
-        canvas->save();
-        for (SkScalar x = 0; x < 4; x++) {
-            canvas->save();
-            canvas->scale(kScale * (x + 1), kScale * (x + 1));
-            canvas->translate(x * 100, 0);
-            canvas->drawPatch(patch, paint);
-            draw_control_points(canvas, patch);
-            canvas->restore();
+        SkColor cornerColors[] = {
+            SK_ColorBLUE, SK_ColorRED, SK_ColorBLUE,
+            SK_ColorRED, SK_ColorBLUE, SK_ColorRED,
+            SK_ColorBLUE, SK_ColorRED, SK_ColorBLUE
+        };
+        
+        SkPoint hrzCtrl[] = {
+            {75,80},{125,20},{175,50},{225,50},
+            {75,180},{125,120},{175,150},{225,150},
+            {75,250},{125,250},{175,250},{225,250}
+        };
+        
+        SkPoint vrtCtrl[] = {
+            {50,75},{150,75},{250,75},
+            {50,125},{150,125},{250,125},
+            {50,175},{150,175},{250,175},
+            {50,225},{150,225},{250,225}
+        };
+        
+        canvas->scale(5, 5);
+        SkMeshGradient grad(2, 2, vertices, hrzCtrl, vrtCtrl, cornerColors);
+        
+        grad.draw(canvas, paint);
+        SkISize dims = grad.getDimensions();
+        for (int y = 0; y < dims.height(); y++) {
+            for (int x = 0; x < dims.width(); x++) {
+                SkPatch patch;
+                grad.getPatchAt(x, y, &patch);
+                draw_control_points(canvas, patch);
+            }
         }
-        
-        canvas->translate(0, 270);
-        
-        static const SkScalar kSkew = 0.2f;
-        for (SkScalar x = 0; x < 4; x++) {
-            canvas->save();
-            canvas->scale(kScale * (x + 1), kScale * (x + 1));
-            canvas->translate(x * 100, 0);
-            canvas->skew(kSkew * (x + 1), kSkew * (x + 1));
-            canvas->drawPatch(patch, paint);
-            draw_control_points(canvas, patch);
-            canvas->restore();
-        }
-        canvas->restore();
     }
 
 private:
     typedef GM INHERITED;
 };
 
-DEF_GM(return SkNEW(SkPatchGM); )
+DEF_GM(return SkNEW(SkMeshGradientGM); )
 
 }
 
 #endif