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156 lines
4.6 KiB
156 lines
4.6 KiB
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/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include <EGL/egl.h>
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#include <GLES/gl.h>
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#include "../GLWindowContext.h"
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#include "WindowContextFactory_android.h"
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#include "gl/GrGLInterface.h"
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using sk_app::GLWindowContext;
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using sk_app::DisplayParams;
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namespace {
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class GLWindowContext_android : public GLWindowContext {
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public:
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GLWindowContext_android(ANativeWindow*, const DisplayParams&);
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~GLWindowContext_android() override;
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void onSwapBuffers() override;
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sk_sp<const GrGLInterface> onInitializeContext() override;
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void onDestroyContext() override;
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private:
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EGLDisplay fDisplay;
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EGLContext fEGLContext;
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EGLSurface fSurfaceAndroid;
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// For setDisplayParams and resize which call onInitializeContext with null platformData
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ANativeWindow* fNativeWindow = nullptr;
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typedef GLWindowContext INHERITED;
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};
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GLWindowContext_android::GLWindowContext_android(ANativeWindow* window,
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const DisplayParams& params)
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: INHERITED(params)
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, fDisplay(EGL_NO_DISPLAY)
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, fEGLContext(EGL_NO_CONTEXT)
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, fSurfaceAndroid(EGL_NO_SURFACE)
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, fNativeWindow(window) {
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// any config code here (particularly for msaa)?
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this->initializeContext();
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}
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GLWindowContext_android::~GLWindowContext_android() {
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this->destroyContext();
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}
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sk_sp<const GrGLInterface> GLWindowContext_android::onInitializeContext() {
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fWidth = ANativeWindow_getWidth(fNativeWindow);
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fHeight = ANativeWindow_getHeight(fNativeWindow);
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fDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
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EGLint majorVersion;
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EGLint minorVersion;
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eglInitialize(fDisplay, &majorVersion, &minorVersion);
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SkAssertResult(eglBindAPI(EGL_OPENGL_ES_API));
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EGLint numConfigs = 0;
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EGLint eglSampleCnt = fDisplayParams.fMSAASampleCount > 1 ? fDisplayParams.fMSAASampleCount > 1
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: 0;
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const EGLint configAttribs[] = {
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EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
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EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
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EGL_RED_SIZE, 8,
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EGL_GREEN_SIZE, 8,
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EGL_BLUE_SIZE, 8,
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EGL_ALPHA_SIZE, 8,
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EGL_STENCIL_SIZE, 8,
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EGL_SAMPLE_BUFFERS, eglSampleCnt ? 1 : 0,
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EGL_SAMPLES, eglSampleCnt,
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EGL_NONE
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};
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EGLConfig surfaceConfig;
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SkAssertResult(eglChooseConfig(fDisplay, configAttribs, &surfaceConfig, 1, &numConfigs));
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SkASSERT(numConfigs > 0);
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static const EGLint kEGLContextAttribsForOpenGLES[] = {
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EGL_CONTEXT_CLIENT_VERSION, 2,
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EGL_NONE
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};
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fEGLContext = eglCreateContext(
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fDisplay, surfaceConfig, nullptr, kEGLContextAttribsForOpenGLES);
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SkASSERT(EGL_NO_CONTEXT != fEGLContext);
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// SkDebugf("EGL: %d.%d", majorVersion, minorVersion);
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// SkDebugf("Vendor: %s", eglQueryString(fDisplay, EGL_VENDOR));
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// SkDebugf("Extensions: %s", eglQueryString(fDisplay, EGL_EXTENSIONS));
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fSurfaceAndroid = eglCreateWindowSurface(fDisplay, surfaceConfig, fNativeWindow, nullptr);
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SkASSERT(EGL_NO_SURFACE != fSurfaceAndroid);
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SkAssertResult(eglMakeCurrent(fDisplay, fSurfaceAndroid, fSurfaceAndroid, fEGLContext));
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// GLWindowContext::initializeContext will call GrGLMakeNativeInterface so we
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// won't call it here.
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glClearStencil(0);
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glClearColor(0, 0, 0, 0);
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glStencilMask(0xffffffff);
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glClear(GL_STENCIL_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
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eglGetConfigAttrib(fDisplay, surfaceConfig, EGL_STENCIL_SIZE, &fStencilBits);
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eglGetConfigAttrib(fDisplay, surfaceConfig, EGL_SAMPLES, &fSampleCount);
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fSampleCount = SkTMax(fSampleCount, 1);
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return GrGLMakeNativeInterface();
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}
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void GLWindowContext_android::onDestroyContext() {
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if (!fDisplay || !fEGLContext || !fSurfaceAndroid) {
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return;
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}
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eglMakeCurrent(fDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
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SkAssertResult(eglDestroySurface(fDisplay, fSurfaceAndroid));
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SkAssertResult(eglDestroyContext(fDisplay, fEGLContext));
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fEGLContext = EGL_NO_CONTEXT;
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fSurfaceAndroid = EGL_NO_SURFACE;
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}
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void GLWindowContext_android::onSwapBuffers() {
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if (fDisplay && fEGLContext && fSurfaceAndroid) {
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eglSwapBuffers(fDisplay, fSurfaceAndroid);
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}
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}
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} // anonymous namespace
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namespace sk_app {
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namespace window_context_factory {
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WindowContext* NewGLForAndroid(ANativeWindow* window, const DisplayParams& params) {
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WindowContext* ctx = new GLWindowContext_android(window, params);
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if (!ctx->isValid()) {
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delete ctx;
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return nullptr;
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}
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return ctx;
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}
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} // namespace window_context_factory
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} // namespace sk_app
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