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 typedef RasterWindowContext INHERITED;
37 };
38
RasterWindowContext_android(ANativeWindow * window,const DisplayParams & params)39 RasterWindowContext_android::RasterWindowContext_android(ANativeWindow* window,
40 const DisplayParams& params)
41 : INHERITED(params) {
42 fNativeWindow = window;
43 fWidth = ANativeWindow_getWidth(fNativeWindow);
44 fHeight = ANativeWindow_getHeight(fNativeWindow);
45 this->setBuffersGeometry();
46 }
47
setBuffersGeometry()48 void RasterWindowContext_android::setBuffersGeometry() {
49 int32_t format = 0;
50 switch(fDisplayParams.fColorType) {
51 case kRGBA_8888_SkColorType:
52 format = WINDOW_FORMAT_RGBA_8888;
53 break;
54 case kRGB_565_SkColorType:
55 format = WINDOW_FORMAT_RGB_565;
56 break;
57 default:
58 SK_ABORT("Unsupported Android color type");
59 }
60 ANativeWindow_setBuffersGeometry(fNativeWindow, fWidth, fHeight, format);
61 }
62
setDisplayParams(const DisplayParams & params)63 void RasterWindowContext_android::setDisplayParams(const DisplayParams& params) {
64 fDisplayParams = params;
65 this->setBuffersGeometry();
66 }
67
resize(int w,int h)68 void RasterWindowContext_android::resize(int w, int h) {
69 fWidth = w;
70 fHeight = h;
71 this->setBuffersGeometry();
72 }
73
getBackbufferSurface()74 sk_sp<SkSurface> RasterWindowContext_android::getBackbufferSurface() {
75 if (nullptr == fBackbufferSurface) {
76 ANativeWindow_lock(fNativeWindow, &fBuffer, &fBounds);
77 const int bytePerPixel = fBuffer.format == WINDOW_FORMAT_RGB_565 ? 2 : 4;
78 SkImageInfo info = SkImageInfo::Make(fWidth, fHeight,
79 fDisplayParams.fColorType,
80 kPremul_SkAlphaType,
81 fDisplayParams.fColorSpace);
82 fBackbufferSurface = SkSurface::MakeRasterDirect(
83 info, fBuffer.bits, fBuffer.stride * bytePerPixel, nullptr);
84 }
85 return fBackbufferSurface;
86 }
87
88
swapBuffers()89 void RasterWindowContext_android::swapBuffers() {
90 ANativeWindow_unlockAndPost(fNativeWindow);
91 fBackbufferSurface.reset(nullptr);
92 }
93 } // anonymous namespace
94
95 namespace sk_app {
96 namespace window_context_factory {
97
NewRasterForAndroid(ANativeWindow * window,const DisplayParams & params)98 WindowContext* NewRasterForAndroid(ANativeWindow* window, const DisplayParams& params) {
99 WindowContext* ctx = new RasterWindowContext_android(window, params);
100 if (!ctx->isValid()) {
101 delete ctx;
102 return nullptr;
103 }
104 return ctx;
105 }
106
107 }
108 } // namespace sk_app
109