add test for poly2poly

git-svn-id: http://skia.googlecode.com/svn/trunk@805 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 108 insertions, 0 deletions

diff --git a/gm/poly2poly.cpp b/gm/poly2poly.cpp
new file mode 100644
index 0000000000..193ede7422
--- /dev/null
+++ b/gm/poly2poly.cpp
@@ -0,0 +1,108 @@
+#include "gm.h"
+
+namespace skiagm {
+
+class Poly2PolyGM : public GM {
+public:
+	Poly2PolyGM() {}
+    
+protected:
+    virtual SkString onShortName() {
+        return SkString("poly2poly");
+    }
+
+	virtual SkISize onISize() {
+        return make_isize(835, 840);
+    }
+
+    void drawBG(SkCanvas* canvas) {
+        canvas->drawColor(SK_ColorWHITE);
+    }
+	
+    static void doDraw(SkCanvas* canvas, SkPaint* paint, const int isrc[],
+                       const int idst[], int count) {
+        SkMatrix matrix;
+        SkPoint src[4], dst[4];
+        
+        for (int i = 0; i < count; i++) {
+            src[i].set(SkIntToScalar(isrc[2*i+0]), SkIntToScalar(isrc[2*i+1]));
+            dst[i].set(SkIntToScalar(idst[2*i+0]), SkIntToScalar(idst[2*i+1]));
+        }
+        
+        canvas->save();
+        matrix.setPolyToPoly(src, dst, count);
+        canvas->concat(matrix);
+        
+        paint->setColor(SK_ColorGRAY);
+        paint->setStyle(SkPaint::kStroke_Style);
+        const SkScalar D = SkIntToScalar(64);
+        canvas->drawRectCoords(0, 0, D, D, *paint);
+        canvas->drawLine(0, 0, D, D, *paint);
+        canvas->drawLine(0, D, D, 0, *paint);
+        
+        SkPaint::FontMetrics fm;
+        paint->getFontMetrics(&fm);
+        paint->setColor(SK_ColorRED);
+        paint->setStyle(SkPaint::kFill_Style);
+        SkScalar x = D/2;
+        float y = D/2 - (fm.fAscent + fm.fDescent)/2;
+        SkString str;
+        str.appendS32(count);
+        canvas->drawText(str.c_str(), str.size(), x, y, *paint);
+        
+        canvas->restore();
+    }
+    
+    virtual void onDraw(SkCanvas* canvas) {
+        this->drawBG(canvas);
+        
+        SkPaint paint;
+        paint.setAntiAlias(true);
+        paint.setStrokeWidth(SkIntToScalar(4));
+        paint.setTextSize(SkIntToScalar(40));
+        paint.setTextAlign(SkPaint::kCenter_Align);
+		
+        canvas->save();
+        canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
+        // translate (1 point)
+        const int src1[] = { 0, 0 };
+        const int dst1[] = { 5, 5 };
+        doDraw(canvas, &paint, src1, dst1, 1);
+        canvas->restore();
+        
+        canvas->save();
+        canvas->translate(SkIntToScalar(160), SkIntToScalar(10));
+        // rotate/uniform-scale (2 points)
+        const int src2[] = { 32, 32, 64, 32 };
+        const int dst2[] = { 32, 32, 64, 48 };
+        doDraw(canvas, &paint, src2, dst2, 2);
+        canvas->restore();
+        
+        canvas->save();
+        canvas->translate(SkIntToScalar(10), SkIntToScalar(110));
+        // rotate/skew (3 points)
+        const int src3[] = { 0, 0, 64, 0, 0, 64 };
+        const int dst3[] = { 0, 0, 96, 0, 24, 64 };
+        doDraw(canvas, &paint, src3, dst3, 3);
+        canvas->restore();
+        
+        canvas->save();
+        canvas->translate(SkIntToScalar(160), SkIntToScalar(110));
+        // perspective (4 points)
+        const int src4[] = { 0, 0, 64, 0, 64, 64, 0, 64 };
+        const int dst4[] = { 0, 0, 96, 0, 64, 96, 0, 64 };
+        doDraw(canvas, &paint, src4, dst4, 4);
+        canvas->restore();
+    }
+    
+private:
+    typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static GM* MyFactory(void*) { return new Poly2PolyGM; }
+static GMRegistry reg(MyFactory);
+
+}
+