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#include <mbgl/platform/default/headless_view.hpp>
#include <mbgl/platform/default/headless_display.hpp>
#include <CoreFoundation/CoreFoundation.h>
namespace mbgl {
gl::glProc HeadlessView::initializeExtension(const char* name) {
static CFBundleRef framework = CFBundleGetBundleWithIdentifier(CFSTR("com.apple.opengl"));
if (!framework) {
throw std::runtime_error("Failed to load OpenGL framework.");
}
CFStringRef str = CFStringCreateWithCString(kCFAllocatorDefault, name, kCFStringEncodingASCII);
void* symbol = CFBundleGetFunctionPointerForName(framework, str);
CFRelease(str);
return reinterpret_cast<gl::glProc>(symbol);
}
void HeadlessView::createContext() {
CGLError error = CGLCreateContext(display->pixelFormat, nullptr, &glContext);
if (error != kCGLNoError) {
throw std::runtime_error(std::string("Error creating GL context object:") + CGLErrorString(error) + "\n");
}
error = CGLEnable(glContext, kCGLCEMPEngine);
if (error != kCGLNoError) {
throw std::runtime_error(std::string("Error enabling OpenGL multithreading:") + CGLErrorString(error) + "\n");
}
}
void HeadlessView::destroyContext() {
CGLDestroyContext(glContext);
}
void HeadlessView::resizeFramebuffer() {
const unsigned int w = dimensions[0] * pixelRatio;
const unsigned int h = dimensions[1] * pixelRatio;
// Create depth/stencil buffer
MBGL_CHECK_ERROR(glGenRenderbuffersEXT(1, &fboDepthStencil));
MBGL_CHECK_ERROR(glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fboDepthStencil));
MBGL_CHECK_ERROR(glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH24_STENCIL8_EXT, w, h));
MBGL_CHECK_ERROR(glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0));
MBGL_CHECK_ERROR(glGenRenderbuffersEXT(1, &fboColor));
MBGL_CHECK_ERROR(glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fboColor));
MBGL_CHECK_ERROR(glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGBA8, w, h));
MBGL_CHECK_ERROR(glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0));
MBGL_CHECK_ERROR(glGenFramebuffersEXT(1, &fbo));
MBGL_CHECK_ERROR(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo));
MBGL_CHECK_ERROR(glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER_EXT, fboColor));
MBGL_CHECK_ERROR(glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER_EXT, fboDepthStencil));
GLenum status = MBGL_CHECK_ERROR(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT));
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
std::string error("Couldn't create framebuffer: ");
switch (status) {
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT: (error += "incomplete attachment"); break;
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT: error += "incomplete missing attachment"; break;
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT: error += "incomplete dimensions"; break;
case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT: error += "incomplete formats"; break;
case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT: error += "incomplete draw buffer"; break;
case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT: error += "incomplete read buffer"; break;
case GL_FRAMEBUFFER_UNSUPPORTED: error += "unsupported"; break;
default: error += "other"; break;
}
throw std::runtime_error(error);
}
MBGL_CHECK_ERROR(glViewport(0, 0, w, h));
}
void HeadlessView::clearBuffers() {
assert(active);
MBGL_CHECK_ERROR(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0));
if (fbo) {
MBGL_CHECK_ERROR(glDeleteFramebuffersEXT(1, &fbo));
fbo = 0;
}
if (fboColor) {
MBGL_CHECK_ERROR(glDeleteRenderbuffersEXT(1, &fboColor));
fboColor = 0;
}
if (fboDepthStencil) {
MBGL_CHECK_ERROR(glDeleteRenderbuffersEXT(1, &fboDepthStencil));
fboDepthStencil = 0;
}
}
void HeadlessView::activateContext() {
CGLError error = CGLSetCurrentContext(glContext);
if (error != kCGLNoError) {
throw std::runtime_error(std::string("Switching OpenGL context failed:") + CGLErrorString(error) + "\n");
}
}
void HeadlessView::deactivateContext() {
CGLError error = CGLSetCurrentContext(nullptr);
if (error != kCGLNoError) {
throw std::runtime_error(std::string("Removing OpenGL context failed:") + CGLErrorString(error) + "\n");
}
}
} // namespace mbgl
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