/* * Copyright 2012 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "gl/SkANGLEGLContext.h" SkANGLEGLContext::AutoContextRestore::AutoContextRestore() { fOldEGLContext = eglGetCurrentContext(); fOldDisplay = eglGetCurrentDisplay(); fOldSurface = eglGetCurrentSurface(EGL_DRAW); } SkANGLEGLContext::AutoContextRestore::~AutoContextRestore() { if (NULL != fOldDisplay) { eglMakeCurrent(fOldDisplay, fOldSurface, fOldSurface, fOldEGLContext); } } /////////////////////////////////////////////////////////////////////////////// SkANGLEGLContext::SkANGLEGLContext() : fContext(EGL_NO_CONTEXT) , fDisplay(EGL_NO_DISPLAY) , fSurface(EGL_NO_SURFACE) { } SkANGLEGLContext::~SkANGLEGLContext() { this->destroyGLContext(); } void SkANGLEGLContext::destroyGLContext() { if (fDisplay) { eglMakeCurrent(fDisplay, 0, 0, 0); if (fContext) { eglDestroyContext(fDisplay, fContext); fContext = EGL_NO_CONTEXT; } if (fSurface) { eglDestroySurface(fDisplay, fSurface); fSurface = EGL_NO_SURFACE; } //TODO should we close the display? fDisplay = EGL_NO_DISPLAY; } } const GrGLInterface* SkANGLEGLContext::createGLContext() { fDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY); EGLint majorVersion; EGLint minorVersion; eglInitialize(fDisplay, &majorVersion, &minorVersion); EGLint numConfigs; static const EGLint configAttribs[] = { EGL_SURFACE_TYPE, EGL_PBUFFER_BIT, EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, EGL_RED_SIZE, 8, EGL_GREEN_SIZE, 8, EGL_BLUE_SIZE, 8, EGL_ALPHA_SIZE, 8, EGL_NONE }; EGLConfig surfaceConfig; eglChooseConfig(fDisplay, configAttribs, &surfaceConfig, 1, &numConfigs); static const EGLint contextAttribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE }; fContext = eglCreateContext(fDisplay, surfaceConfig, NULL, contextAttribs); static const EGLint surfaceAttribs[] = { EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE }; fSurface = eglCreatePbufferSurface(fDisplay, surfaceConfig, surfaceAttribs); eglMakeCurrent(fDisplay, fSurface, fSurface, fContext); const GrGLInterface* interface = GrGLCreateANGLEInterface(); if (NULL == interface) { SkDebugf("Could not create ANGLE GL interface!\n"); this->destroyGLContext(); return NULL; } return interface; } void SkANGLEGLContext::makeCurrent() const { if (!eglMakeCurrent(fDisplay, fSurface, fSurface, fContext)) { SkDebugf("Could not set the context.\n"); } } void SkANGLEGLContext::swapBuffers() const { if (!eglSwapBuffers(fDisplay, fSurface)) { SkDebugf("Could not complete eglSwapBuffers.\n"); } }