IntSize GLContextEGL::defaultFrameBufferSize()
{
if (!canRenderToDefaultFramebuffer())
return IntSize();
EGLint width, height;
if (!eglQuerySurface(sharedEGLDisplay(), m_surface, EGL_WIDTH, &width)
|| !eglQuerySurface(sharedEGLDisplay(), m_surface, EGL_HEIGHT, &height))
return IntSize();
return IntSize(width, height);
}
static bool getEGLConfig(EGLConfig* config, GLContextEGL::EGLSurfaceType surfaceType)
{
EGLint attributeList[] = {
#if USE(OPENGL_ES_2)
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
#else
EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
#endif
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_STENCIL_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_SURFACE_TYPE, EGL_NONE,
EGL_NONE
};
switch (surfaceType) {
case GLContextEGL::PbufferSurface:
attributeList[13] = EGL_PBUFFER_BIT;
break;
case GLContextEGL::PixmapSurface:
attributeList[13] = EGL_PIXMAP_BIT;
break;
case GLContextEGL::WindowSurface:
attributeList[13] = EGL_WINDOW_BIT;
break;
}
EGLint numberConfigsReturned;
return eglChooseConfig(sharedEGLDisplay(), attributeList, config, 1, &numberConfigsReturned) && numberConfigsReturned;
}
PassOwnPtr<GLContextEGL> GLContextEGL::createContext(EGLNativeWindowType window, GLContext* sharingContext)
{
if (!sharedEGLDisplay())
return nullptr;
static bool initialized = false;
static bool success = true;
if (!initialized) {
#if !USE(OPENGL_ES_2)
success = initializeOpenGLShims();
#endif
initialized = true;
}
if (!success)
return nullptr;
EGLContext eglSharingContext = sharingContext ? static_cast<GLContextEGL*>(sharingContext)->m_context : 0;
OwnPtr<GLContextEGL> context = window ? createWindowContext(window, sharingContext) : nullptr;
if (!context)
context = createPixmapContext(eglSharingContext);
if (!context)
context = createPbufferContext(eglSharingContext);
return context.release();
}
PassOwnPtr<GLContextEGL> GLContextEGL::createPixmapContext(EGLContext sharingContext)
{
#if PLATFORM(X11)
EGLDisplay display = sharedEGLDisplay();
if (display == EGL_NO_DISPLAY)
return nullptr;
EGLConfig config;
if (!getEGLConfig(&config, PixmapSurface))
return nullptr;
EGLContext context = eglCreateContext(display, config, sharingContext, gContextAttributes);
if (context == EGL_NO_CONTEXT)
return nullptr;
EGLint depth;
if (!eglGetConfigAttrib(display, config, EGL_DEPTH_SIZE, &depth))
return nullptr;
Pixmap pixmap = XCreatePixmap(sharedX11Display(), DefaultRootWindow(sharedX11Display()), 1, 1, depth);
if (!pixmap)
return nullptr;
EGLSurface surface = eglCreatePixmapSurface(display, config, pixmap, 0);
if (surface == EGL_NO_SURFACE)
return nullptr;
return adoptPtr(new GLContextEGL(context, surface, PixmapSurface));
#else
return nullptr;
#endif
}
PassOwnPtr<GLContextEGL> GLContextEGL::createPbufferContext(EGLContext sharingContext)
{
#if !PLATFORM(JS)
EGLDisplay display = sharedEGLDisplay();
if (display == EGL_NO_DISPLAY)
return nullptr;
EGLConfig config;
if (!getEGLConfig(&config, PbufferSurface))
return nullptr;
EGLContext context = eglCreateContext(display, config, sharingContext, gContextAttributes);
if (context == EGL_NO_CONTEXT)
return nullptr;
static const int pbufferAttributes[] = { EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE };
EGLSurface surface = eglCreatePbufferSurface(display, config, pbufferAttributes);
if (surface == EGL_NO_SURFACE) {
eglDestroyContext(display, context);
return nullptr;
}
return adoptPtr(new GLContextEGL(context, surface, PbufferSurface));
#else
return nullptr;
#endif
}
bool GLContextEGL::makeContextCurrent()
{
ASSERT(m_context && m_surface);
GLContext::makeContextCurrent();
if (eglGetCurrentContext() == m_context)
return true;
return eglMakeCurrent(sharedEGLDisplay(), m_surface, m_surface, m_context);
}
cairo_device_t* GLContextEGL::cairoDevice()
{
if (m_cairoDevice)
return m_cairoDevice;
#if ENABLE(ACCELERATED_2D_CANVAS)
m_cairoDevice = cairo_egl_device_create(sharedEGLDisplay(), m_context);
#endif
return m_cairoDevice;
}
GLContextEGL::~GLContextEGL()
{
if (m_cairoDevice)
cairo_device_destroy(m_cairoDevice);
EGLDisplay display = sharedEGLDisplay();
if (m_context) {
glBindFramebuffer(GL_FRAMEBUFFER, 0);
eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroyContext(display, m_context);
}
if (m_surface)
eglDestroySurface(display, m_surface);
}
PassOwnPtr<GLContextEGL> GLContextEGL::createWindowContext(EGLNativeWindowType window, GLContext* sharingContext)
{
EGLContext eglSharingContext = sharingContext ? static_cast<GLContextEGL*>(sharingContext)->m_context : 0;
EGLDisplay display = sharedEGLDisplay();
if (display == EGL_NO_DISPLAY)
return nullptr;
EGLConfig config;
if (!getEGLConfig(&config, WindowSurface))
return nullptr;
EGLContext context = eglCreateContext(display, config, eglSharingContext, gContextAttributes);
if (context == EGL_NO_CONTEXT)
return nullptr;
EGLSurface surface = eglCreateWindowSurface(display, config, window, 0);
if (surface == EGL_NO_SURFACE)
return nullptr;
return adoptPtr(new GLContextEGL(context, surface, WindowSurface));
}
void GLContextEGL::swapBuffers()
{
ASSERT(m_surface);
eglSwapBuffers(sharedEGLDisplay(), m_surface);
}
