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#include "stdafx.h"
#include "Device.h"
#include "App.h"
#include "Core/Convert.h"
#include "D2D/Device.h"
#include "Cairo/Device.h"
#include "Cairo/GLDevice.h"
#include "Skia/Device.h"
#include "Exception.h"
#include "Window.h"
#include "RenderMgr.h"
#include "Workaround/Apply.h"
namespace gui {
#if defined(GUI_WIN32)
Device *Device::create(Engine &e) {
return applyEnvWorkarounds(new D2DDevice(e));
}
#elif defined(GUI_GTK)
GtkWidget *Device::drawWidget(Engine &e, Handle handle) {
Window *w = app(e)->findWindow(handle);
if (!w)
return handle.widget();
else
return w->drawWidget();
}
template <class T>
Device *create(Engine &e) {
return new T(e);
}
struct CreateDevice {
const char *name;
Device *(*create)(Engine &e);
};
// These are ordered by priority:
static CreateDevice devices[] = {
#ifdef GUI_ENABLE_SKIA
{ "skia", &create<SkiaDevice> },
#endif
#ifdef GUI_ENABLE_CAIRO_GL
{ "gl", &create<CairoGLDevice> },
#endif
{ "gtk", &create<CairoGtkDevice> },
{ "software", &create<CairoSwDevice> },
{ "sw", &create<CairoSwDevice> },
};
Device *Device::create(Engine &e) {
const char *preference = getenv(ENV_RENDER_BACKEND);
CreateDevice *selected = null;
if (!preference) {
selected = &devices[0];
} else {
for (size_t i = 0; i < ARRAY_COUNT(devices); i++) {
if (strcmp(preference, devices[i].name) == 0) {
selected = &devices[i];
break;
}
}
if (!selected) {
StrBuf *msg = new (e) StrBuf();
*msg << S("The supplied value of ") S(ENV_RENDER_BACKEND) S(" is not supported.\n");
*msg << S("This build provides the following options: ");
for (size_t i = 0; i < ARRAY_COUNT(devices); i++) {
if (i > 0)
*msg << S(", ");
*msg << toWChar(e, devices[i].name)->v;
}
throw new (e) GuiError(msg->toS());
}
}
Device *device = (*selected->create)(e);
return applyEnvWorkarounds(device);
}
#else
#error "Unknown UI toolkit."
#endif
#ifdef GUI_GTK
static void reportError(Engine &e, GError *error) {
StrBuf *msg = new (e) StrBuf();
*msg << S("Initialization of OpenGL failed: ") << toWChar(e, error->message)->v << S("\n");
*msg << S("Try setting the environment variable ") << S(ENV_RENDER_BACKEND) << S(" to \"gtk\" or \"software\".");
g_clear_error(&error);
throw new (e) GuiError(msg->toS());
}
GLDevice::GLDevice(Engine &e) : Device(), e(e) {}
GLDevice::~GLDevice() {
for (Map::iterator i = context.begin(); i != context.end(); ++i) {
i->second->owner = null;
}
}
Surface *GLDevice::createSurface(Handle window) {
GtkWidget *widget = drawWidget(e, window);
GdkWindow *w = gtk_widget_get_window(widget);
if (!w)
return null;
Context *c = null;
// Note: We don't own references in the map.
Map::iterator found = context.find(w);
if (found == context.end()) {
c = createContext(w, createContext(w));
// Figure out if we need any workarounds...
gdk_gl_context_make_current(c->context);
c->workarounds = glWorkarounds();
context.insert(std::make_pair(w, c));
} else {
c = found->second;
c->ref();
}
try {
Surface *r = createSurface(widget, c);
if (c->workarounds)
r = c->workarounds->apply(r);
return r;
} catch (...) {
c->unref();
throw;
}
}
GdkGLContext *GLDevice::createContext(GdkWindow *window) {
GError *error = NULL;
GdkGLContext *context = gdk_window_create_gl_context(window, &error);
if (error) {
g_object_unref(context);
reportError(e, error);
}
gdk_gl_context_set_use_es(context, true);
gdk_gl_context_set_required_version(context, 2, 0);
gdk_gl_context_realize(context, &error);
if (error) {
g_object_unref(context);
reportError(e, error);
}
return context;
}
GLDevice::Context *GLDevice::createContext(GdkWindow *window, GdkGLContext *context) {
return new Context(this, window, context);
}
GLDevice::Context::Context(GLDevice *owner, GdkWindow *window, GdkGLContext *context)
: window(window), context(context), id(0), refs(1), owner(owner), workarounds(null) {}
GLDevice::Context::~Context() {
// Remove us from our owner's map fo contexts. The owner might have been destroyed before
// us, so keep that in mind.
if (owner) {
owner->context.erase(window);
// Free the ID as well.
if (id)
renderMgr(owner->e)->freeId(id);
}
gdk_gl_context_clear_current();
g_object_unref(context);
delete workarounds;
}
#endif
}
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