add gm test for ninepatch stretching

pdf output incorrect, so not checked in.



git-svn-id: http://skia.googlecode.com/svn/trunk@2224 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 124 insertions, 0 deletions

diff --git a/gm/ninepatchstretch.cpp b/gm/ninepatchstretch.cpp
new file mode 100644
index 0000000000..dfe0b7cbca
--- /dev/null
+++ b/gm/ninepatchstretch.cpp
@@ -0,0 +1,124 @@
+/*
+ * 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 "gm.h"
+
+#include "SkGpuDevice.h"
+#include "SkNinePatch.h"
+
+static void make_bitmap(SkBitmap* bitmap, GrContext* ctx, SkIRect* center) {
+    SkDevice* dev;
+    SkCanvas canvas;
+    
+    const int kFixed = 28;
+    const int kStretchy = 8;
+    const int kSize = 2*kFixed + kStretchy;
+    
+    if (ctx) {
+        dev = new SkGpuDevice(ctx, SkBitmap::kARGB_8888_Config, kSize, kSize);
+        *bitmap = dev->accessBitmap(false);
+    } else {
+        bitmap->setConfig(SkBitmap::kARGB_8888_Config, kSize, kSize);
+        bitmap->allocPixels();
+        dev = new SkDevice(*bitmap);
+    }
+    
+    canvas.setDevice(dev)->unref();
+    canvas.clear(0);
+    
+    SkRect r = SkRect::MakeWH(SkIntToScalar(kSize), SkIntToScalar(kSize));
+    const SkScalar strokeWidth = SkIntToScalar(6);
+    const SkScalar radius = SkIntToScalar(kFixed) - strokeWidth/2;
+    
+    center->setXYWH(kFixed, kFixed, kStretchy, kStretchy);
+    
+    SkPaint paint;
+    paint.setAntiAlias(true);
+    
+    paint.setColor(0xFFFF0000);
+    canvas.drawRoundRect(r, radius, radius, paint);
+    r.setXYWH(SkIntToScalar(kFixed), 0, SkIntToScalar(kStretchy), SkIntToScalar(kSize));
+    paint.setColor(0x8800FF00);
+    canvas.drawRect(r, paint);
+    r.setXYWH(0, SkIntToScalar(kFixed), SkIntToScalar(kSize), SkIntToScalar(kStretchy));
+    paint.setColor(0x880000FF);
+    canvas.drawRect(r, paint);
+}
+
+namespace skiagm {
+    
+class NinePatchStretchGM : public GM {
+public:
+    SkBitmap fBM;
+
+	NinePatchStretchGM() {}
+
+protected:
+    virtual SkString onShortName() {
+        return SkString("ninepatch-stretch");
+    }
+
+	virtual SkISize onISize() {
+        return make_isize(400, 400);
+    }
+
+    static void drawNine(SkCanvas* canvas, const SkRect& dst, const SkBitmap& bm,
+                         const SkIRect& center, const SkPaint* paint) {
+        SkIRect margin;
+        margin.set(center.fLeft, center.fTop, bm.width() - center.fRight,
+                   bm.height() - center.fBottom);
+        SkNinePatch::DrawNine(canvas, dst, bm, margin, paint);
+    }
+    
+    virtual void onDraw(SkCanvas* canvas) {
+        canvas->drawColor(SK_ColorBLACK);
+
+        SkBitmap bm;
+        SkIRect center;
+        make_bitmap(&bm, NULL /*SampleCode::GetGr()*/, &center);
+        
+        // amount of bm that should not be stretched (unless we have to)
+        const SkScalar fixed = SkIntToScalar(bm.width() - center.width());
+        
+        const SkTSize<SkScalar> size[] = {
+            { fixed * 4 / 5, fixed * 4 / 5 },   // shrink in both axes
+            { fixed * 4 / 5, fixed * 4 },       // shrink in X
+            { fixed * 4,     fixed * 4 / 5 },   // shrink in Y
+            { fixed * 4,     fixed * 4 }
+        };
+        
+        canvas->drawBitmap(bm, SkIntToScalar(10), SkIntToScalar(10), NULL);
+        
+        SkScalar x = SkIntToScalar(100);
+        SkScalar y = SkIntToScalar(100);
+        
+        SkPaint paint;
+        paint.setFilterBitmap(true);
+        
+        for (int iy = 0; iy < 2; ++iy) {
+            for (int ix = 0; ix < 2; ++ix) {
+                int i = ix * 2 + iy;
+                SkRect r = SkRect::MakeXYWH(x + ix * fixed, y + iy * fixed,
+                                            size[i].width(), size[i].height());
+                drawNine(canvas, r, bm, center, &paint);
+            }
+        }
+    }
+    
+private:
+    typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static GM* MyFactory(void*) { return new NinePatchStretchGM; }
+static GMRegistry reg(MyFactory);
+
+}
+
+
+