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/*
* 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 <GLES/gl.h>
#include "GLWindowContext_android.h"
#include <android/native_window_jni.h>
namespace sk_app {
// Most of the following 3 functions (GLWindowContext::Create, constructor, desctructor)
// are copied from Unix/Win platform with unix/win changed to android
// platform-dependent create
GLWindowContext* GLWindowContext::Create(void* platformData, const DisplayParams& params) {
GLWindowContext_android* ctx = new GLWindowContext_android(platformData, params);
if (!ctx->isValid()) {
delete ctx;
return nullptr;
}
return ctx;
}
GLWindowContext_android::GLWindowContext_android(void* platformData, const DisplayParams& params)
: GLWindowContext(platformData, params)
, fDisplay(EGL_NO_DISPLAY)
, fEGLContext(EGL_NO_CONTEXT)
, fSurface(EGL_NO_SURFACE) {
// any config code here (particularly for msaa)?
this->initializeContext(platformData, params);
}
GLWindowContext_android::~GLWindowContext_android() {
this->destroyContext();
}
void GLWindowContext_android::onInitializeContext(void* platformData, const DisplayParams& params) {
ContextPlatformData_android* androidPlatformData =
reinterpret_cast<ContextPlatformData_android*>(platformData);
fWidth = ANativeWindow_getWidth(androidPlatformData->fNativeWindow);
fHeight = ANativeWindow_getHeight(androidPlatformData->fNativeWindow);
fDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
EGLint majorVersion;
EGLint minorVersion;
eglInitialize(fDisplay, &majorVersion, &minorVersion);
SkAssertResult(eglBindAPI(EGL_OPENGL_ES_API));
EGLint numConfigs = 0;
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;
SkAssertResult(eglChooseConfig(fDisplay, configAttribs, &surfaceConfig, 1, &numConfigs));
SkASSERT(numConfigs > 0);
static const EGLint kEGLContextAttribsForOpenGLES[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
fEGLContext = eglCreateContext(
fDisplay, surfaceConfig, nullptr, kEGLContextAttribsForOpenGLES);
SkASSERT(EGL_NO_CONTEXT != fEGLContext);
fSurface = eglCreateWindowSurface(
fDisplay, surfaceConfig, androidPlatformData->fNativeWindow, nullptr);
SkASSERT(EGL_NO_SURFACE != fSurface);
SkAssertResult(eglMakeCurrent(fDisplay, fSurface, fSurface, fEGLContext));
// GLWindowContext::initializeContext will call GrGLCreateNativeInterface so we
// won't call it here.
glClearStencil(0);
glClearColor(0, 0, 0, 0);
glStencilMask(0xffffffff);
glClear(GL_STENCIL_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
int redBits, greenBits, blueBits;
eglGetConfigAttrib(fDisplay, surfaceConfig, EGL_RED_SIZE, &redBits);
eglGetConfigAttrib(fDisplay, surfaceConfig, EGL_GREEN_SIZE, &greenBits);
eglGetConfigAttrib(fDisplay, surfaceConfig, EGL_BLUE_SIZE, &blueBits);
fColorBits = redBits + greenBits + blueBits;
eglGetConfigAttrib(fDisplay, surfaceConfig, EGL_STENCIL_SIZE, &fStencilBits);
eglGetConfigAttrib(fDisplay, surfaceConfig, EGL_SAMPLES, &fSampleCount);
}
void GLWindowContext_android::onDestroyContext() {
if (!fDisplay || !fEGLContext || !fSurface) {
return;
}
eglMakeCurrent(fDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
SkAssertResult(eglDestroySurface(fDisplay, fSurface));
SkAssertResult(eglDestroyContext(fDisplay, fEGLContext));
fEGLContext = EGL_NO_CONTEXT;
fSurface = EGL_NO_SURFACE;
}
void GLWindowContext_android::onSwapBuffers() {
if (fDisplay && fEGLContext && fSurface) {
eglSwapBuffers(fDisplay, fSurface);
}
}
}
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