1
2 /*
3 * Copyright 2016 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9 #include "WindowContextFactory_android.h"
10 #include "../RasterWindowContext.h"
11 #include "SkSurface.h"
12 #include "SkTypes.h"
13
14 using sk_app::RasterWindowContext;
15 using sk_app::DisplayParams;
16
17 namespace {
18 class RasterWindowContext_android : public RasterWindowContext {
19 public:
20 RasterWindowContext_android(ANativeWindow*, const DisplayParams& params);
21
22 sk_sp<SkSurface> getBackbufferSurface() override;
23 void swapBuffers() override;
24
isValid()25 bool isValid() override { return SkToBool(fNativeWindow); }
26 void resize(int w, int h) override;
27 void setDisplayParams(const DisplayParams& params) override;
28
29 private:
30 void setBuffersGeometry();
31 sk_sp<SkSurface> fBackbufferSurface = nullptr;
32 ANativeWindow* fNativeWindow = nullptr;
33 ANativeWindow_Buffer fBuffer;
34 ARect fBounds;
35 };
36
RasterWindowContext_android(ANativeWindow * window,const DisplayParams & params)37 RasterWindowContext_android::RasterWindowContext_android(ANativeWindow* window,
38 const DisplayParams& params) {
39 fDisplayParams = params;
40 fNativeWindow = window;
41 fWidth = ANativeWindow_getWidth(fNativeWindow);
42 fHeight = ANativeWindow_getHeight(fNativeWindow);
43 this->setBuffersGeometry();
44 }
45
setBuffersGeometry()46 void RasterWindowContext_android::setBuffersGeometry() {
47 int32_t format = 0;
48 switch(fDisplayParams.fColorType) {
49 case kRGBA_8888_SkColorType:
50 format = WINDOW_FORMAT_RGBA_8888;
51 break;
52 case kRGB_565_SkColorType:
53 format = WINDOW_FORMAT_RGB_565;
54 break;
55 default:
56 SK_ABORT("Unsupported Android color type");
57 }
58 ANativeWindow_setBuffersGeometry(fNativeWindow, fWidth, fHeight, format);
59 }
60
setDisplayParams(const DisplayParams & params)61 void RasterWindowContext_android::setDisplayParams(const DisplayParams& params) {
62 fDisplayParams = params;
63 this->setBuffersGeometry();
64 }
65
resize(int w,int h)66 void RasterWindowContext_android::resize(int w, int h) {
67 fWidth = w;
68 fHeight = h;
69 this->setBuffersGeometry();
70 }
71
getBackbufferSurface()72 sk_sp<SkSurface> RasterWindowContext_android::getBackbufferSurface() {
73 if (nullptr == fBackbufferSurface) {
74 ANativeWindow_lock(fNativeWindow, &fBuffer, &fBounds);
75 const int bytePerPixel = fBuffer.format == WINDOW_FORMAT_RGB_565 ? 2 : 4;
76 SkImageInfo info = SkImageInfo::Make(fWidth, fHeight,
77 fDisplayParams.fColorType,
78 kPremul_SkAlphaType,
79 fDisplayParams.fColorSpace);
80 fBackbufferSurface = SkSurface::MakeRasterDirect(
81 info, fBuffer.bits, fBuffer.stride * bytePerPixel, nullptr);
82 }
83 return fBackbufferSurface;
84 }
85
86
swapBuffers()87 void RasterWindowContext_android::swapBuffers() {
88 ANativeWindow_unlockAndPost(fNativeWindow);
89 fBackbufferSurface.reset(nullptr);
90 }
91 } // anonymous namespace
92
93 namespace sk_app {
94 namespace window_context_factory {
95
NewRasterForAndroid(ANativeWindow * window,const DisplayParams & params)96 WindowContext* NewRasterForAndroid(ANativeWindow* window, const DisplayParams& params) {
97 WindowContext* ctx = new RasterWindowContext_android(window, params);
98 if (!ctx->isValid()) {
99 delete ctx;
100 return nullptr;
101 }
102 return ctx;
103 }
104
105 }
106 } // namespace sk_app
107