1 files changed, 108 insertions, 0 deletions
diff --git a/tools/sk_app/android/RasterWindowContext_android.cpp b/tools/sk_app/android/RasterWindowContext_android.cpp
new file mode 100644
index 0000000000..101e51ef42
--- /dev/null
+++ b/tools/sk_app/android/RasterWindowContext_android.cpp
@@ -0,0 +1,108 @@
+
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "WindowContextFactory_android.h"
+#include "../RasterWindowContext.h"
+#include "SkSurface.h"
+#include "SkTypes.h"
+
+using sk_app::RasterWindowContext;
+using sk_app::DisplayParams;
+
+namespace {
+class RasterWindowContext_android : public RasterWindowContext {
+public:
+    RasterWindowContext_android(ANativeWindow*, const DisplayParams& params);
+
+    sk_sp<SkSurface> getBackbufferSurface() override;
+    void swapBuffers() override;
+
+    bool isValid() override { return SkToBool(fNativeWindow); }
+    void resize(int w, int h) override;
+    void setDisplayParams(const DisplayParams& params) override;
+
+private:
+    void setBuffersGeometry();
+    sk_sp<SkSurface> fBackbufferSurface = nullptr;
+    ANativeWindow* fNativeWindow = nullptr;
+    ANativeWindow_Buffer fBuffer;
+    ARect fBounds;
+
+    typedef RasterWindowContext INHERITED;
+};
+
+RasterWindowContext_android::RasterWindowContext_android(ANativeWindow* window,
+                                                         const DisplayParams& params)
+    : INHERITED(params) {
+    fNativeWindow = window;
+    fWidth = ANativeWindow_getWidth(fNativeWindow);
+    fHeight = ANativeWindow_getHeight(fNativeWindow);
+    this->setBuffersGeometry();
+}
+
+void RasterWindowContext_android::setBuffersGeometry() {
+    int32_t format = 0;
+    switch(fDisplayParams.fColorType) {
+        case kRGBA_8888_SkColorType:
+            format = WINDOW_FORMAT_RGBA_8888;
+            break;
+        case kRGB_565_SkColorType:
+            format = WINDOW_FORMAT_RGB_565;
+            break;
+        default:
+            SK_ABORT("Unsupported Android color type");
+    }
+    ANativeWindow_setBuffersGeometry(fNativeWindow, fWidth, fHeight, format);
+}
+
+void RasterWindowContext_android::setDisplayParams(const DisplayParams& params) {
+    fDisplayParams = params;
+    this->setBuffersGeometry();
+}
+
+void RasterWindowContext_android::resize(int w, int h) {
+    fWidth = w;
+    fHeight = h;
+    this->setBuffersGeometry();
+}
+
+sk_sp<SkSurface> RasterWindowContext_android::getBackbufferSurface() {
+    if (nullptr == fBackbufferSurface) {
+        ANativeWindow_lock(fNativeWindow, &fBuffer, &fBounds);
+        const int bytePerPixel = fBuffer.format == WINDOW_FORMAT_RGB_565 ? 2 : 4;
+        SkImageInfo info = SkImageInfo::Make(fWidth, fHeight,
+                                             fDisplayParams.fColorType,
+                                             kPremul_SkAlphaType,
+                                             fDisplayParams.fColorSpace);
+        fBackbufferSurface = SkSurface::MakeRasterDirect(
+                info, fBuffer.bits, fBuffer.stride * bytePerPixel, nullptr);
+    }
+    return fBackbufferSurface;
+}
+
+
+void RasterWindowContext_android::swapBuffers() {
+    ANativeWindow_unlockAndPost(fNativeWindow);
+    fBackbufferSurface.reset(nullptr);
+}
+}  // anonymous namespace
+
+namespace sk_app {
+namespace window_context_factory {
+
+WindowContext* NewRasterForAndroid(ANativeWindow* window, const DisplayParams& params) {
+    WindowContext* ctx = new RasterWindowContext_android(window, params);
+    if (!ctx->isValid()) {
+        delete ctx;
+        return nullptr;
+    }
+    return ctx;
+}
+
+}
+}   // namespace sk_app