Index: tools/viewer/sk_app/win/RasterWindowContext_win.cpp |
diff --git a/tools/viewer/sk_app/win/RasterWindowContext_win.cpp b/tools/viewer/sk_app/win/RasterWindowContext_win.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..ca738db28812bdb68af371187444e8693b11ec7f |
--- /dev/null |
+++ b/tools/viewer/sk_app/win/RasterWindowContext_win.cpp |
@@ -0,0 +1,96 @@ |
+/* |
+ * 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_win.h" |
+#include "../RasterWindowContext.h" |
+#include "SkSurface.h" |
+ |
+#include <Windows.h> |
+ |
+using sk_app::RasterWindowContext; |
+using sk_app::DisplayParams; |
+ |
+namespace { |
+ |
+class RasterWindowContext_win : public RasterWindowContext { |
+public: |
+ RasterWindowContext_win(HWND, const DisplayParams&); |
+ |
+ sk_sp<SkSurface> getBackbufferSurface() override; |
+ void swapBuffers() override; |
+ bool isValid() override { return SkToBool(fWnd); } |
+ void resize(int w, int h) override; |
+ void setDisplayParams(const DisplayParams& params) override; |
+ |
+protected: |
+ SkAutoMalloc fSurfaceMemory; |
+ sk_sp<SkSurface> fBackbufferSurface; |
+ HWND fWnd; |
+}; |
+ |
+RasterWindowContext_win::RasterWindowContext_win(HWND wnd, const DisplayParams& params) |
+ : fWnd(wnd) { |
+ fDisplayParams = params; |
+ RECT rect; |
+ GetWindowRect(wnd, &rect); |
+ this->resize(rect.right - rect.left, rect.bottom - rect.top); |
+} |
+ |
+void RasterWindowContext_win::setDisplayParams(const DisplayParams& params) { |
+ fDisplayParams = params; |
+ RECT rect; |
+ GetWindowRect(fWnd, &rect); |
+ this->resize(rect.right - rect.left, rect.bottom - rect.top); |
+} |
+ |
+void RasterWindowContext_win::resize(int w, int h) { |
+ fWidth = w; |
+ fHeight = h; |
+ fBackbufferSurface.reset(); |
+ const size_t bmpSize = sizeof(BITMAPINFOHEADER) + w * h * sizeof(uint32_t); |
+ fSurfaceMemory.reset(bmpSize); |
+ BITMAPINFO* bmpInfo = reinterpret_cast<BITMAPINFO*>(fSurfaceMemory.get()); |
+ ZeroMemory(bmpInfo, sizeof(BITMAPINFO)); |
+ bmpInfo->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); |
+ bmpInfo->bmiHeader.biWidth = w; |
+ bmpInfo->bmiHeader.biHeight = -h; // negative means top-down bitmap. Skia draws top-down. |
+ bmpInfo->bmiHeader.biPlanes = 1; |
+ bmpInfo->bmiHeader.biBitCount = 32; |
+ bmpInfo->bmiHeader.biCompression = BI_RGB; |
+ void* pixels = bmpInfo->bmiColors; |
+ |
+ SkImageInfo info = SkImageInfo::Make(w, h, fDisplayParams.fColorType, kPremul_SkAlphaType, |
+ fDisplayParams.fColorSpace); |
+ fBackbufferSurface = SkSurface::MakeRasterDirect(info, pixels, sizeof(uint32_t) * w); |
+} |
+ |
+sk_sp<SkSurface> RasterWindowContext_win::getBackbufferSurface() { return fBackbufferSurface; } |
+ |
+void RasterWindowContext_win::swapBuffers() { |
+ BITMAPINFO* bmpInfo = reinterpret_cast<BITMAPINFO*>(fSurfaceMemory.get()); |
+ HDC dc = GetDC(fWnd); |
+ StretchDIBits(dc, 0, 0, fWidth, fHeight, 0, 0, fWidth, fHeight, bmpInfo->bmiColors, bmpInfo, |
+ DIB_RGB_COLORS, SRCCOPY); |
+ ReleaseDC(fWnd, dc); |
+} |
+ |
+} // anonymous namespace |
+ |
+namespace sk_app { |
+namespace window_context_factory { |
+ |
+WindowContext* NewRasterForWin(HWND wnd, const DisplayParams& params) { |
+ WindowContext* ctx = new RasterWindowContext_win(wnd, params); |
+ if (!ctx->isValid()) { |
+ delete ctx; |
+ ctx = nullptr; |
+ } |
+ return ctx; |
+} |
+ |
+} // namespace window_context_factory |
+} // namespace sk_app |