bgfx/src/glcontext_nsgl.mm
Branimir Karadžić f44c8e2b14 Happy New Year!
2018-01-01 11:16:06 -08:00

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/*
* Copyright 2011-2018 Branimir Karadzic. All rights reserved.
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
*/
#include "bgfx_p.h"
#if BX_PLATFORM_OSX && (BGFX_CONFIG_RENDERER_OPENGLES || BGFX_CONFIG_RENDERER_OPENGL)
# include "renderer_gl.h"
# include <AvailabilityMacros.h>
# include <Cocoa/Cocoa.h>
# include <bx/os.h>
namespace bgfx { namespace gl
{
# define GL_IMPORT(_optional, _proto, _func, _import) _proto _func
# include "glimports.h"
struct SwapChainGL
{
SwapChainGL(void* _nwh)
{
BX_UNUSED(_nwh);
}
~SwapChainGL()
{
}
void makeCurrent()
{
}
void swapBuffers()
{
}
};
class AutoreleasePoolHolder
{
public:
AutoreleasePoolHolder() : m_pool([[NSAutoreleasePool alloc] init])
{
}
~AutoreleasePoolHolder()
{
[m_pool release];
}
private:
AutoreleasePoolHolder(AutoreleasePoolHolder const&);
NSAutoreleasePool* const m_pool;
};
static void* s_opengl = NULL;
void GlContext::create(uint32_t _width, uint32_t _height)
{
BX_UNUSED(_width, _height);
s_opengl = bx::dlopen("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL");
BX_CHECK(NULL != s_opengl, "OpenGL dynamic library is not found!");
const AutoreleasePoolHolder pool;
NSWindow* nsWindow = (NSWindow*)g_platformData.nwh;
m_context = g_platformData.context;
if (NULL == g_platformData.context)
{
#if defined(MAC_OS_X_VERSION_MAX_ALLOWED) && (MAC_OS_X_VERSION_MAX_ALLOWED >= 1070)
NSOpenGLPixelFormatAttribute profile =
#if BGFX_CONFIG_RENDERER_OPENGL >= 31
NSOpenGLProfileVersion3_2Core
#else
NSOpenGLProfileVersionLegacy
#endif // BGFX_CONFIG_RENDERER_OPENGL >= 31
;
#endif // defined(MAC_OS_X_VERSION_MAX_ALLOWED) && (MAC_OS_X_VERSION_MAX_ALLOWED >= 1070)
NSOpenGLPixelFormatAttribute pixelFormatAttributes[] = {
#if defined(MAC_OS_X_VERSION_MAX_ALLOWED) && (MAC_OS_X_VERSION_MAX_ALLOWED >= 1070)
NSOpenGLPFAOpenGLProfile, profile,
#endif // defined(MAC_OS_X_VERSION_MAX_ALLOWED) && (MAC_OS_X_VERSION_MAX_ALLOWED >= 1070)
NSOpenGLPFAColorSize, 24,
NSOpenGLPFAAlphaSize, 8,
NSOpenGLPFADepthSize, 24,
NSOpenGLPFAStencilSize, 8,
NSOpenGLPFADoubleBuffer, true,
NSOpenGLPFAAccelerated, true,
NSOpenGLPFANoRecovery, true,
0, 0,
};
NSOpenGLPixelFormat* pixelFormat = [[NSOpenGLPixelFormat alloc] initWithAttributes:pixelFormatAttributes];
BGFX_FATAL(NULL != pixelFormat, Fatal::UnableToInitialize, "Failed to initialize pixel format.");
NSRect glViewRect = [[nsWindow contentView] bounds];
NSOpenGLView* glView = [[NSOpenGLView alloc] initWithFrame:glViewRect pixelFormat:pixelFormat];
[pixelFormat release];
// GLFW creates a helper contentView that handles things like keyboard and drag and
// drop events. We don't want to clobber that view if it exists. Instead we just
// add ourselves as a subview and make the view resize automatically.
NSView *contentView = [nsWindow contentView];
if (nil != contentView)
{
[glView setAutoresizingMask:( NSViewHeightSizable |
NSViewWidthSizable |
NSViewMinXMargin |
NSViewMaxXMargin |
NSViewMinYMargin |
NSViewMaxYMargin )];
[contentView addSubview:glView];
}
else
{
[nsWindow setContentView:glView];
}
NSOpenGLContext* glContext = [glView openGLContext];
BGFX_FATAL(NULL != glContext, Fatal::UnableToInitialize, "Failed to initialize GL context.");
[glContext makeCurrentContext];
GLint interval = 0;
[glContext setValues:&interval forParameter:NSOpenGLCPSwapInterval];
// When initializing NSOpenGLView programatically (as we are), this sometimes doesn't
// get hooked up properly (especially when there are existing window elements). This ensures
// we are valid. Otherwise, you'll probably get a GL_INVALID_FRAMEBUFFER_OPERATION when
// trying to glClear() for the first time.
[glContext setView:glView];
m_view = glView;
m_context = glContext;
}
import();
g_internalData.context = m_context;
}
void GlContext::destroy()
{
if (NULL == g_platformData.context)
{
NSOpenGLView* glView = (NSOpenGLView*)m_view;
[glView release];
}
m_view = NULL;
m_context = NULL;
bx::dlclose(s_opengl);
}
void GlContext::resize(uint32_t _width, uint32_t _height, uint32_t _flags)
{
BX_UNUSED(_width, _height);
#if defined(MAC_OS_X_VERSION_MAX_ALLOWED) && (MAC_OS_X_VERSION_MAX_ALLOWED >= 1070)
bool hidpi = !!(_flags&BGFX_RESET_HIDPI);
NSOpenGLView* glView = (NSOpenGLView*)m_view;
if ([glView respondsToSelector:@selector(setWantsBestResolutionOpenGLSurface:)])
[glView setWantsBestResolutionOpenGLSurface:hidpi];
#endif // defined(MAC_OS_X_VERSION_MAX_ALLOWED) && (MAC_OS_X_VERSION_MAX_ALLOWED >= 1070)
bool vsync = !!(_flags&BGFX_RESET_VSYNC);
GLint interval = vsync ? 1 : 0;
NSOpenGLContext* glContext = (NSOpenGLContext*)m_context;
[glContext setValues:&interval forParameter:NSOpenGLCPSwapInterval];
[glContext update];
}
uint64_t GlContext::getCaps() const
{
uint64_t caps = 0;
#if defined(MAC_OS_X_VERSION_MAX_ALLOWED) && (MAC_OS_X_VERSION_MAX_ALLOWED >= 1070)
NSWindow* nsWindow = (NSWindow*)g_platformData.nwh;
if ([nsWindow respondsToSelector:@selector(backingScaleFactor)] && (1.0f < [nsWindow backingScaleFactor]))
caps |= BGFX_CAPS_HIDPI;
#endif // defined(MAC_OS_X_VERSION_MAX_ALLOWED) && (MAC_OS_X_VERSION_MAX_ALLOWED >= 1070)
return caps;
}
SwapChainGL* GlContext::createSwapChain(void* _nwh)
{
return BX_NEW(g_allocator, SwapChainGL)(_nwh);
}
void GlContext::destroySwapChain(SwapChainGL* _swapChain)
{
BX_DELETE(g_allocator, _swapChain);
}
void GlContext::swap(SwapChainGL* _swapChain)
{
if (NULL == _swapChain)
{
NSOpenGLContext* glContext = (NSOpenGLContext*)m_context;
[glContext makeCurrentContext];
[glContext flushBuffer];
}
else
{
_swapChain->makeCurrent();
_swapChain->swapBuffers();
}
}
void GlContext::makeCurrent(SwapChainGL* _swapChain)
{
if (NULL == _swapChain)
{
NSOpenGLContext* glContext = (NSOpenGLContext*)m_context;
[glContext makeCurrentContext];
}
else
{
_swapChain->makeCurrent();
}
}
void GlContext::import()
{
BX_TRACE("Import:");
# define GL_EXTENSION(_optional, _proto, _func, _import) \
{ \
if (_func == NULL) \
{ \
_func = (_proto)bx::dlsym(s_opengl, #_import); \
BX_TRACE("%p " #_func " (" #_import ")", _func); \
} \
BGFX_FATAL(_optional || NULL != _func, Fatal::UnableToInitialize, "Failed to create OpenGL context. GetProcAddress(\"%s\")", #_import); \
}
# include "glimports.h"
}
} /* namespace gl */ } // namespace bgfx
void* nsglGetProcAddress(const GLubyte* _name)
{
using namespace bgfx::gl;
if (NULL == s_opengl)
{
s_opengl = bx::dlopen("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL");
}
return bx::dlsym(s_opengl, (const char*)_name);
}
#endif // BX_PLATFORM_OSX && (BGFX_CONFIG_RENDERER_OPENGLES2|BGFX_CONFIG_RENDERER_OPENGLES3|BGFX_CONFIG_RENDERER_OPENGL)