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#include "headless_view.hpp"
#include "headless_display.hpp"
#include <stdexcept>
namespace mbgl {
HeadlessView::HeadlessView() : display_(std::make_shared<HeadlessDisplay>()) {
createContext();
}
HeadlessView::HeadlessView(std::shared_ptr<HeadlessDisplay> display)
: display_(display) {
createContext();
}
void HeadlessView::createContext() {
#if MBGL_USE_CGL
CGLError error = CGLCreateContext(display_->pixelFormat, NULL, &gl_context);
if (error) {
fprintf(stderr, "Error creating GL context object\n");
return;
}
error = CGLEnable(gl_context, kCGLCEMPEngine);
if (error != kCGLNoError ) {
fprintf(stderr, "Error enabling OpenGL multithreading\n");
return;
}
#endif
#if MBGL_USE_GLX
x_display = display_->x_display;
x_info = display_->x_info;
gl_context = glXCreateContext(x_display, x_info, 0, GL_TRUE);
if (gl_context == nullptr) {
throw std::runtime_error("Error creating GL context object");
}
#endif
}
void HeadlessView::resize(uint16_t width, uint16_t height, float pixelRatio) {
clear_buffers();
width *= pixelRatio;
height *= pixelRatio;
#if MBGL_USE_CGL
make_active();
// Create depth/stencil buffer
glGenRenderbuffersEXT(1, &fbo_depth_stencil);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fbo_depth_stencil);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH24_STENCIL8_EXT, width, height);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
glGenRenderbuffersEXT(1, &fbo_color);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fbo_color);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGBA8, width, height);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
glGenFramebuffersEXT(1, &fbo);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER_EXT, fbo_color);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER_EXT, fbo_depth_stencil);
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
fprintf(stderr, "Couldn't create framebuffer: ");
switch (status) {
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT: fprintf(stderr, "incomplete attachment\n"); break;
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT: fprintf(stderr, "incomplete missing attachment\n"); break;
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT: fprintf(stderr, "incomplete dimensions\n"); break;
case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT: fprintf(stderr, "incomplete formats\n"); break;
case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT: fprintf(stderr, "incomplete draw buffer\n"); break;
case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT: fprintf(stderr, "incomplete read buffer\n"); break;
case GL_FRAMEBUFFER_UNSUPPORTED: fprintf(stderr, "unsupported\n"); break;
default: fprintf(stderr, "other\n"); break;
}
return;
}
make_inactive();
#endif
#if MBGL_USE_GLX
x_pixmap = XCreatePixmap(x_display, DefaultRootWindow(x_display), width, height, 32);
glx_pixmap = glXCreateGLXPixmap(x_display, x_info, x_pixmap);
#endif
}
void HeadlessView::clear_buffers() {
#if MBGL_USE_CGL
make_active();
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
if (fbo) {
glDeleteFramebuffersEXT(1, &fbo);
fbo = 0;
}
if (fbo_color) {
glDeleteTextures(1, &fbo_color);
fbo_color = 0;
}
if (fbo_depth_stencil) {
glDeleteRenderbuffersEXT(1, &fbo_depth_stencil);
fbo_depth_stencil = 0;
}
make_inactive();
#endif
#if MBGL_USE_GLX
if (glx_pixmap) {
glXDestroyGLXPixmap(x_display, glx_pixmap);
glx_pixmap = 0;
}
if (x_pixmap) {
XFreePixmap(x_display, x_pixmap);
x_pixmap = 0;
}
make_inactive();
#endif
}
HeadlessView::~HeadlessView() {
clear_buffers();
#if MBGL_USE_CGL
CGLDestroyContext(gl_context);
#endif
#if MBGL_USE_GLX
glXDestroyContext(x_display, gl_context);
#endif
}
void HeadlessView::notify_map_change(mbgl::MapChange /*change*/, mbgl::timestamp /*delay*/) {
// no-op
}
void HeadlessView::make_active() {
#if MBGL_USE_CGL
CGLError error = CGLSetCurrentContext(gl_context);
if (error) {
fprintf(stderr, "Switching OpenGL context failed\n");
}
#endif
#if MBGL_USE_GLX
if (!glXMakeCurrent(x_display, glx_pixmap, gl_context)) {
fprintf(stderr, "Switching OpenGL context failed\n");
}
#endif
}
void HeadlessView::make_inactive() {
#if MBGL_USE_CGL
CGLError error = CGLSetCurrentContext(nullptr);
if (error) {
fprintf(stderr, "Removing OpenGL context failed\n");
}
#endif
#if MBGL_USE_GLX
if (!glXMakeCurrent(x_display, 0, NULL)) {
fprintf(stderr, "Removing OpenGL context failed\n");
}
#endif
}
void HeadlessView::swap() {}
unsigned int HeadlessView::root_fbo() {
#if MBGL_USE_CGL
return fbo;
#endif
return 0;
}
}
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