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- /*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #define EGL_EGL_PROTOTYPES 1
- #include <EGL/egl.h>
- #include <EGL/eglext.h>
- #include "include/gpu/gl/GrGLAssembleInterface.h"
- #include "src/gpu/gl/GrGLDefines.h"
- #include "tools/sk_app/GLWindowContext.h"
- #include "tools/sk_app/win/WindowContextFactory_win.h"
- using sk_app::GLWindowContext;
- using sk_app::DisplayParams;
- namespace {
- EGLDisplay get_angle_egl_display(HDC hdc) {
- PFNEGLGETPLATFORMDISPLAYEXTPROC eglGetPlatformDisplayEXT;
- eglGetPlatformDisplayEXT =
- (PFNEGLGETPLATFORMDISPLAYEXTPROC)eglGetProcAddress("eglGetPlatformDisplayEXT");
- // We expect ANGLE to support this extension
- if (!eglGetPlatformDisplayEXT) {
- return EGL_NO_DISPLAY;
- }
- // We currently only support D3D11 ANGLE.
- static constexpr EGLint kType = EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE;
- static constexpr EGLint attribs[] = {EGL_PLATFORM_ANGLE_TYPE_ANGLE, kType, EGL_NONE};
- return eglGetPlatformDisplayEXT(EGL_PLATFORM_ANGLE_ANGLE, hdc, attribs);
- }
- class ANGLEGLWindowContext_win : public GLWindowContext {
- public:
- ANGLEGLWindowContext_win(HWND, const DisplayParams&);
- ~ANGLEGLWindowContext_win() override;
- protected:
- void onSwapBuffers() override;
- sk_sp<const GrGLInterface> onInitializeContext() override;
- void onDestroyContext() override;
- private:
- HWND fHWND;
- EGLDisplay fDisplay = EGL_NO_DISPLAY;
- EGLContext fEGLContext = EGL_NO_CONTEXT;
- EGLSurface fEGLSurface = EGL_NO_SURFACE;
- typedef GLWindowContext INHERITED;
- };
- ANGLEGLWindowContext_win::ANGLEGLWindowContext_win(HWND wnd, const DisplayParams& params)
- : INHERITED(params), fHWND(wnd) {
- this->initializeContext();
- }
- ANGLEGLWindowContext_win::~ANGLEGLWindowContext_win() { this->destroyContext(); }
- sk_sp<const GrGLInterface> ANGLEGLWindowContext_win::onInitializeContext() {
- HDC dc = GetDC(fHWND);
- fDisplay = get_angle_egl_display(dc);
- if (EGL_NO_DISPLAY == fDisplay) {
- return nullptr;
- }
- EGLint majorVersion;
- EGLint minorVersion;
- if (!eglInitialize(fDisplay, &majorVersion, &minorVersion)) {
- SkDebugf("Could not initialize display!\n");
- return nullptr;
- }
- EGLint numConfigs;
- fSampleCount = this->getDisplayParams().fMSAASampleCount;
- const int sampleBuffers = fSampleCount > 1 ? 1 : 0;
- const int eglSampleCnt = fSampleCount > 1 ? fSampleCount : 0;
- const EGLint configAttribs[] = {EGL_RENDERABLE_TYPE,
- // We currently only support ES3.
- EGL_OPENGL_ES3_BIT,
- EGL_RED_SIZE,
- 8,
- EGL_GREEN_SIZE,
- 8,
- EGL_BLUE_SIZE,
- 8,
- EGL_ALPHA_SIZE,
- 8,
- EGL_SAMPLE_BUFFERS,
- sampleBuffers,
- EGL_SAMPLES,
- eglSampleCnt,
- EGL_NONE};
- EGLConfig surfaceConfig;
- if (!eglChooseConfig(fDisplay, configAttribs, &surfaceConfig, 1, &numConfigs)) {
- SkDebugf("Could not create choose config!\n");
- return nullptr;
- }
- // We currently only support ES3.
- const EGLint contextAttribs[] = {EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE};
- fEGLContext = eglCreateContext(fDisplay, surfaceConfig, nullptr, contextAttribs);
- if (EGL_NO_CONTEXT == fEGLContext) {
- SkDebugf("Could not create context!\n");
- return nullptr;
- }
- fEGLSurface = eglCreateWindowSurface(fDisplay, surfaceConfig, fHWND, nullptr);
- if (EGL_NO_SURFACE == fEGLSurface) {
- SkDebugf("Could not create surface!\n");
- return nullptr;
- }
- if (!eglMakeCurrent(fDisplay, fEGLSurface, fEGLSurface, fEGLContext)) {
- SkDebugf("Could not make contxt current!\n");
- return nullptr;
- }
- sk_sp<const GrGLInterface> interface(GrGLMakeAssembledInterface(
- nullptr,
- [](void* ctx, const char name[]) -> GrGLFuncPtr { return eglGetProcAddress(name); }));
- if (interface) {
- interface->fFunctions.fClearStencil(0);
- interface->fFunctions.fClearColor(0, 0, 0, 0);
- interface->fFunctions.fStencilMask(0xffffffff);
- interface->fFunctions.fClear(GR_GL_STENCIL_BUFFER_BIT | GR_GL_COLOR_BUFFER_BIT);
- // use DescribePixelFormat to get the stencil depth.
- int pixelFormat = GetPixelFormat(dc);
- PIXELFORMATDESCRIPTOR pfd;
- DescribePixelFormat(dc, pixelFormat, sizeof(pfd), &pfd);
- fStencilBits = pfd.cStencilBits;
- RECT rect;
- GetClientRect(fHWND, &rect);
- fWidth = rect.right - rect.left;
- fHeight = rect.bottom - rect.top;
- interface->fFunctions.fViewport(0, 0, fWidth, fHeight);
- }
- return interface;
- }
- void ANGLEGLWindowContext_win::onDestroyContext() {
- eglMakeCurrent(fDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
- if (EGL_NO_CONTEXT != fEGLContext) {
- eglDestroyContext(fDisplay, fEGLContext);
- }
- if (EGL_NO_SURFACE != fEGLSurface) {
- eglDestroySurface(fDisplay, fEGLSurface);
- }
- if (EGL_NO_DISPLAY != fDisplay) {
- eglTerminate(fDisplay);
- }
- }
- void ANGLEGLWindowContext_win::onSwapBuffers() {
- if (!eglSwapBuffers(fDisplay, fEGLSurface)) {
- SkDebugf("Could not complete eglSwapBuffers.\n");
- }
- }
- } // anonymous namespace
- namespace sk_app {
- namespace window_context_factory {
- WindowContext* NewANGLEForWin(HWND wnd, const DisplayParams& params) {
- ANGLEGLWindowContext_win* ctx = new ANGLEGLWindowContext_win(wnd, params);
- if (!ctx->isValid()) {
- delete ctx;
- return nullptr;
- }
- return ctx;
- }
- } // namespace window_context_factory
- } // namespace sk_app
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