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/*
* 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
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