add gm for very large bitmaps (>32K >64K)

raster expected to fail when scaling >64K (for now)



git-svn-id: http://skia.googlecode.com/svn/trunk@4967 2bbb7eff-a529-9590-31e7-b0007b416f81

gm/verylargebitmap.cpp

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2012 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 "SkCanvas.h"
+#include "SkPath.h"
+
+static void make_bm(SkBitmap* bm, int width, int height, SkColor color) {
+    bm->setConfig(SkBitmap::kARGB_8888_Config, width, height);
+    bm->allocPixels();
+    bm->eraseColor(color);
+    bm->setImmutable();
+}
+
+static void show_bm(SkCanvas* canvas, int width, int height, SkColor color) {
+    SkBitmap bm;
+    make_bm(&bm, width, height, color);
+
+    SkPaint paint;
+    SkRect r;
+    SkIRect ir;
+
+    paint.setStyle(SkPaint::kStroke_Style);
+
+    ir.set(0, 0, 128, 128);
+    r.set(ir);
+
+    canvas->save();
+    canvas->clipRect(r);
+    canvas->drawBitmap(bm, 0, 0, NULL);
+    canvas->restore();
+    canvas->drawRect(r, paint);
+
+    r.offset(SkIntToScalar(150), 0);
+    // exercises extract bitmap, but not shader
+    canvas->drawBitmapRect(bm, &ir, r, NULL);
+    canvas->drawRect(r, paint);
+
+    r.offset(SkIntToScalar(150), 0);
+    // exercises bitmapshader
+    canvas->drawBitmapRect(bm, NULL, r, NULL);
+    canvas->drawRect(r, paint);
+}
+
+class VeryLargeBitmapGM : public skiagm::GM {
+public:
+    VeryLargeBitmapGM() {}
+
+protected:
+    virtual SkString onShortName() SK_OVERRIDE {
+        return SkString("verylargebitmap");
+    }
+
+    virtual SkISize onISize() SK_OVERRIDE {
+        return SkISize::Make(640, 480);
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        int veryBig = 100*1024; // 64K < size
+        int big = 60*1024;      // 32K < size < 64K
+        int small = 300;
+
+        canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
+        show_bm(canvas, small, small, SK_ColorRED);
+        canvas->translate(0, SkIntToScalar(150));
+
+        show_bm(canvas, big, small, SK_ColorBLUE);
+        canvas->translate(0, SkIntToScalar(150));
+        
+        // as of this writing, the raster code will fail to draw the scaled version
+        // since it has a 64K limit on x,y coordinates... (but gpu should succeed)
+        show_bm(canvas, veryBig, small, SK_ColorGREEN);
+    }
+
+private:
+    typedef skiagm::GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static skiagm::GM* MyFactory(void*) { return new VeryLargeBitmapGM; }
+static skiagm::GMRegistry reg(MyFactory);
+

gyp/gmslides.gypi

@@ -67,6 +67,7 @@
     '../gm/typeface.cpp',
     '../gm/verttext.cpp',
     '../gm/verttext2.cpp',
+    '../gm/verylargebitmap.cpp',
     '../gm/xfermodes.cpp',
   ],
 }