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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrContext.h"
#include "SkRefCnt.h"
#include "gl/GrGLFunctions.h"
#include "gl/GrGLInterface.h"
#include <EGL/egl.h>
#include <GLES2/gl2.h>
#include <sstream>
static const EGLint configAttribs[] = {
EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
EGL_BLUE_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_RED_SIZE, 8,
EGL_DEPTH_SIZE, 8,
EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
EGL_NONE
};
static const int pbufferWidth = 9;
static const int pbufferHeight = 9;
static const EGLint pbufferAttribs[] = {
EGL_WIDTH, pbufferWidth,
EGL_HEIGHT, pbufferHeight,
EGL_NONE,
};
// create_grcontext implementation for EGL.
sk_sp<GrContext> create_grcontext(std::ostringstream &driverinfo) {
EGLDisplay eglDpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (EGL_NO_DISPLAY == eglDpy) {
return nullptr;
}
EGLint major, minor;
if (EGL_TRUE != eglInitialize(eglDpy, &major, &minor)) {
return nullptr;
}
EGLint numConfigs;
EGLConfig eglCfg;
if (EGL_TRUE != eglChooseConfig(eglDpy, configAttribs, &eglCfg, 1, &numConfigs)) {
return nullptr;
}
EGLSurface eglSurf = eglCreatePbufferSurface(eglDpy, eglCfg, pbufferAttribs);
if (EGL_NO_SURFACE == eglSurf) {
return nullptr;
}
if (EGL_TRUE != eglBindAPI(EGL_OPENGL_API)) {
return nullptr;
}
EGLContext eglCtx = eglCreateContext(eglDpy, eglCfg, EGL_NO_CONTEXT, nullptr);
if (EGL_NO_CONTEXT == eglCtx) {
return nullptr;
}
if (EGL_FALSE == eglMakeCurrent(eglDpy, eglSurf, eglSurf, eglCtx)) {
return nullptr;
}
driverinfo << "EGL " << major << "." << minor << "\n";
GrGLGetStringProc getString = (GrGLGetStringProc )eglGetProcAddress("glGetString");
driverinfo << "GL Versionr: " << getString(GL_VERSION) << "\n";
driverinfo << "GL Vendor: " << getString(GL_VENDOR) << "\n";
driverinfo << "GL Renderer: " << getString(GL_RENDERER) << "\n";
driverinfo << "GL Extensions: " << getString(GL_EXTENSIONS) << "\n";
auto interface = GrGLMakeNativeInterface();
if (!interface) {
return nullptr;
}
eglTerminate(eglDpy);
return sk_sp<GrContext>(GrContext::MakeGL(interface));
}
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