1 files changed, 151 insertions, 0 deletions
diff --git a/chromium/third_party/skia/samplecode/SampleDitherBitmap.cpp b/chromium/third_party/skia/samplecode/SampleDitherBitmap.cpp
new file mode 100644
index 00000000000..e05d074f3b1
--- /dev/null
+++ b/chromium/third_party/skia/samplecode/SampleDitherBitmap.cpp
@@ -0,0 +1,151 @@
+
+/*
+ * 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 "SampleCode.h"
+#include "SkColorPriv.h"
+#include "SkGradientShader.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkUtils.h"
+
+static void draw_rect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
+    canvas->drawRect(r, p);
+
+    SkPaint frame(p);
+    frame.setShader(NULL);
+    frame.setStyle(SkPaint::kStroke_Style);
+    canvas->drawRect(r, frame);
+}
+
+static void draw_gradient(SkCanvas* canvas) {
+    SkRect r = { 0, 0, SkIntToScalar(256), SkIntToScalar(32) };
+    SkPoint pts[] = { { r.fLeft, r.fTop }, { r.fRight, r.fTop } };
+    SkColor colors[] = { 0xFF000000, 0xFFFF0000 };
+    SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2,
+                                                 SkShader::kClamp_TileMode);
+
+    SkPaint p;
+    p.setShader(s)->unref();
+    draw_rect(canvas, r, p);
+
+    canvas->translate(0, SkIntToScalar(40));
+    p.setDither(true);
+    draw_rect(canvas, r, p);
+}
+
+static bool test_pathregion() {
+    SkPath path;
+    SkRegion region;
+    path.moveTo(25071800.f, -141823808.f);
+    path.lineTo(25075500.f, -141824000.f);
+    path.lineTo(25075400.f, -141827712.f);
+    path.lineTo(25071810.f, -141827600.f);
+    path.close();
+
+    SkIRect bounds;
+    path.getBounds().round(&bounds);
+    SkRegion clip(bounds);
+    return region.setPath(path, clip); // <-- !! DOWN !!
+}
+
+static SkBitmap make_bitmap() {
+    SkPMColor c[256];
+    for (int i = 0; i < 256; i++) {
+        c[i] = SkPackARGB32(0xFF, i, 0, 0);
+    }
+    SkColorTable* ctable = new SkColorTable(c, 256, kOpaque_SkAlphaType);
+
+    SkBitmap bm;
+    bm.allocPixels(SkImageInfo::Make(256, 32, kIndex_8_SkColorType,
+                                     kPremul_SkAlphaType),
+                   NULL, ctable);
+    ctable->unref();
+
+    bm.lockPixels();
+    for (int y = 0; y < bm.height(); y++) {
+        uint8_t* p = bm.getAddr8(0, y);
+        for (int x = 0; x < 256; x++) {
+            p[x] = x;
+        }
+    }
+    bm.unlockPixels();
+    return bm;
+}
+
+class DitherBitmapView : public SampleView {
+    SkBitmap    fBM8;
+    SkBitmap    fBM32;
+    bool        fResult;
+public:
+    DitherBitmapView() {
+        fResult = test_pathregion();
+        fBM8 = make_bitmap();
+        fBM8.copyTo(&fBM32, kN32_SkColorType);
+
+        this->setBGColor(0xFFDDDDDD);
+    }
+
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "DitherBitmap");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+
+    static void setBitmapOpaque(SkBitmap* bm, bool isOpaque) {
+        SkAutoLockPixels alp(*bm);  // needed for ctable
+        bm->setAlphaType(isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
+    }
+
+    static void draw2(SkCanvas* canvas, const SkBitmap& bm) {
+        SkPaint paint;
+        SkBitmap bitmap(bm);
+
+        setBitmapOpaque(&bitmap, false);
+        paint.setDither(false);
+        canvas->drawBitmap(bitmap, 0, 0, &paint);
+        paint.setDither(true);
+        canvas->drawBitmap(bitmap, 0, SkIntToScalar(bm.height() + 10), &paint);
+
+        setBitmapOpaque(&bitmap, true);
+        SkScalar x = SkIntToScalar(bm.width() + 10);
+        paint.setDither(false);
+        canvas->drawBitmap(bitmap, x, 0, &paint);
+        paint.setDither(true);
+        canvas->drawBitmap(bitmap, x, SkIntToScalar(bm.height() + 10), &paint);
+    }
+
+    virtual void onDrawContent(SkCanvas* canvas) {
+        canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
+
+        draw2(canvas, fBM8);
+        canvas->translate(0, SkIntToScalar(fBM8.height() *3));
+        draw2(canvas, fBM32);
+
+        canvas->translate(0, SkIntToScalar(fBM8.height() *3));
+        draw_gradient(canvas);
+
+        char resultTrue[] = "SkRegion::setPath returned true";
+        char resultFalse[] = "SkRegion::setPath returned false";
+        SkPaint p;
+        if (fResult)
+            canvas->drawText(resultTrue, sizeof(resultTrue) - 1, 0, 50, p);
+        else
+            canvas->drawText(resultFalse, sizeof(resultFalse) - 1, 0, 50, p);
+    }
+
+private:
+    typedef SampleView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new DitherBitmapView; }
+static SkViewRegister reg(MyFactory);