godot/platform/nacl/opengl_context.cpp

124 lines
4.5 KiB
C++

/*************************************************************************/
/* opengl_context.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "opengl_context.h"
#include <pthread.h>
#include "ppapi/gles2/gl2ext_ppapi.h"
#include "os_nacl.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/completion_callback.h"
#include "ppapi/utility/completion_callback_factory.h"
namespace {
// This is called by the brower when the 3D context has been flushed to the
// browser window.
void FlushCallback(void* data, int32_t result) {
static_cast<OpenGLContext*>(data)->set_flush_pending(false);
static_cast<OpenGLContext*>(data)->FlushContext();
}
} // namespace
OpenGLContext::OpenGLContext(pp::Instance* p_instance)
: pp::Graphics3DClient(p_instance),
flush_pending_(false) {
instance = p_instance;
pp::Module* module = pp::Module::Get();
assert(module);
gles2_interface_ = static_cast<const struct PPB_OpenGLES2_Dev*>(
module->GetBrowserInterface(PPB_OPENGLES2_INTERFACE));
assert(gles2_interface_);
}
OpenGLContext::~OpenGLContext() {
glSetCurrentContextPPAPI(0);
}
bool OpenGLContext::MakeContextCurrent(pp::Instance* instance) {
if (instance == NULL) {
glSetCurrentContextPPAPI(0);
return false;
}
// Lazily create the Pepper context.
if (context_.is_null()) {
int32_t attribs[] = {
PP_GRAPHICS3DATTRIB_ALPHA_SIZE, 8,
PP_GRAPHICS3DATTRIB_DEPTH_SIZE, 24,
PP_GRAPHICS3DATTRIB_STENCIL_SIZE, 8,
PP_GRAPHICS3DATTRIB_SAMPLES, 0,
PP_GRAPHICS3DATTRIB_SAMPLE_BUFFERS, 0,
PP_GRAPHICS3DATTRIB_WIDTH, width,
PP_GRAPHICS3DATTRIB_HEIGHT, height,
PP_GRAPHICS3DATTRIB_NONE
};
context_ = pp::Graphics3D(instance, pp::Graphics3D(), attribs);
if (context_.is_null()) {
glSetCurrentContextPPAPI(0);
return false;
}
instance->BindGraphics(context_);
}
glSetCurrentContextPPAPI(context_.pp_resource());
return true;
}
void OpenGLContext::ResizeContext(const pp::Size& size) {
width = size.width();
height = size.height();
if (!context_.is_null()) {
context_.ResizeBuffers(size.width(), size.height());
}
}
void OpenGLContext::InvalidateContext(pp::Instance* instance) {
glSetCurrentContextPPAPI(0);
}
void OpenGLContext::FlushContext() {
if (flush_pending()) {
// A flush is pending so do nothing; just drop this flush on the floor.
return;
}
set_flush_pending(true);
OSNacl* os = (OSNacl*)OS::get_singleton();
MakeContextCurrent(instance);
os->iterate();
context_.SwapBuffers(pp::CompletionCallback(&FlushCallback, this));
}