зеркало из https://github.com/mozilla/gecko-dev.git
537 строки
19 KiB
C++
537 строки
19 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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// vim:set ts=2 sts=2 sw=2 et cin:
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "MacIOSurface.h"
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#include <OpenGL/gl.h>
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#include <QuartzCore/QuartzCore.h>
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#include <dlfcn.h>
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#include "mozilla/RefPtr.h"
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#include "mozilla/Assertions.h"
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using namespace mozilla;
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// IOSurface signatures
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#define IOSURFACE_FRAMEWORK_PATH \
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"/System/Library/Frameworks/IOSurface.framework/IOSurface"
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#define OPENGL_FRAMEWORK_PATH \
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"/System/Library/Frameworks/OpenGL.framework/OpenGL"
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#define COREGRAPHICS_FRAMEWORK_PATH \
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"/System/Library/Frameworks/ApplicationServices.framework/Frameworks/" \
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"CoreGraphics.framework/CoreGraphics"
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#define COREVIDEO_FRAMEWORK_PATH \
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"/System/Library/Frameworks/ApplicationServices.framework/Frameworks/" \
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"CoreVideo.framework/CoreVideo"
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#define GET_CONST(const_name) \
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((CFStringRef*) dlsym(sIOSurfaceFramework, const_name))
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#define GET_IOSYM(dest,sym_name) \
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(typeof(dest)) dlsym(sIOSurfaceFramework, sym_name)
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#define GET_CGLSYM(dest,sym_name) \
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(typeof(dest)) dlsym(sOpenGLFramework, sym_name)
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#define GET_CGSYM(dest,sym_name) \
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(typeof(dest)) dlsym(sCoreGraphicsFramework, sym_name)
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#define GET_CVSYM(dest, sym_name) \
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(typeof(dest)) dlsym(sCoreVideoFramework, sym_name)
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MacIOSurfaceLib::LibraryUnloader MacIOSurfaceLib::sLibraryUnloader;
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bool MacIOSurfaceLib::isLoaded = false;
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void* MacIOSurfaceLib::sIOSurfaceFramework;
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void* MacIOSurfaceLib::sOpenGLFramework;
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void* MacIOSurfaceLib::sCoreGraphicsFramework;
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void* MacIOSurfaceLib::sCoreVideoFramework;
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IOSurfaceCreateFunc MacIOSurfaceLib::sCreate;
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IOSurfaceGetIDFunc MacIOSurfaceLib::sGetID;
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IOSurfaceLookupFunc MacIOSurfaceLib::sLookup;
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IOSurfaceGetBaseAddressFunc MacIOSurfaceLib::sGetBaseAddress;
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IOSurfaceGetBaseAddressOfPlaneFunc MacIOSurfaceLib::sGetBaseAddressOfPlane;
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IOSurfaceSizeTFunc MacIOSurfaceLib::sWidth;
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IOSurfaceSizeTFunc MacIOSurfaceLib::sHeight;
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IOSurfaceSizeTFunc MacIOSurfaceLib::sPlaneCount;
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IOSurfaceSizeTFunc MacIOSurfaceLib::sBytesPerRow;
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IOSurfaceGetPropertyMaximumFunc MacIOSurfaceLib::sGetPropertyMaximum;
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IOSurfaceVoidFunc MacIOSurfaceLib::sIncrementUseCount;
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IOSurfaceVoidFunc MacIOSurfaceLib::sDecrementUseCount;
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IOSurfaceLockFunc MacIOSurfaceLib::sLock;
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IOSurfaceUnlockFunc MacIOSurfaceLib::sUnlock;
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CGLTexImageIOSurface2DFunc MacIOSurfaceLib::sTexImage;
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IOSurfaceContextCreateFunc MacIOSurfaceLib::sIOSurfaceContextCreate;
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IOSurfaceContextCreateImageFunc MacIOSurfaceLib::sIOSurfaceContextCreateImage;
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IOSurfaceContextGetSurfaceFunc MacIOSurfaceLib::sIOSurfaceContextGetSurface;
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CVPixelBufferGetIOSurfaceFunc MacIOSurfaceLib::sCVPixelBufferGetIOSurface;
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unsigned int (*MacIOSurfaceLib::sCGContextGetTypePtr) (CGContextRef) = nullptr;
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CFStringRef MacIOSurfaceLib::kPropWidth;
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CFStringRef MacIOSurfaceLib::kPropHeight;
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CFStringRef MacIOSurfaceLib::kPropBytesPerElem;
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CFStringRef MacIOSurfaceLib::kPropBytesPerRow;
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CFStringRef MacIOSurfaceLib::kPropIsGlobal;
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bool MacIOSurfaceLib::isInit() {
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// Guard against trying to reload the library
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// if it is not available.
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if (!isLoaded)
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LoadLibrary();
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MOZ_ASSERT(sIOSurfaceFramework);
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return sIOSurfaceFramework;
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}
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IOSurfacePtr MacIOSurfaceLib::IOSurfaceCreate(CFDictionaryRef properties) {
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return sCreate(properties);
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}
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IOSurfacePtr MacIOSurfaceLib::IOSurfaceLookup(IOSurfaceID aIOSurfaceID) {
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return sLookup(aIOSurfaceID);
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}
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IOSurfaceID MacIOSurfaceLib::IOSurfaceGetID(IOSurfacePtr aIOSurfacePtr) {
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return sGetID(aIOSurfacePtr);
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}
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void* MacIOSurfaceLib::IOSurfaceGetBaseAddress(IOSurfacePtr aIOSurfacePtr) {
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return sGetBaseAddress(aIOSurfacePtr);
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}
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void* MacIOSurfaceLib::IOSurfaceGetBaseAddressOfPlane(IOSurfacePtr aIOSurfacePtr,
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size_t planeIndex) {
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return sGetBaseAddressOfPlane(aIOSurfacePtr, planeIndex);
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}
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size_t MacIOSurfaceLib::IOSurfaceGetPlaneCount(IOSurfacePtr aIOSurfacePtr) {
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return sPlaneCount(aIOSurfacePtr);
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}
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size_t MacIOSurfaceLib::IOSurfaceGetWidth(IOSurfacePtr aIOSurfacePtr) {
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return sWidth(aIOSurfacePtr);
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}
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size_t MacIOSurfaceLib::IOSurfaceGetHeight(IOSurfacePtr aIOSurfacePtr) {
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return sHeight(aIOSurfacePtr);
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}
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size_t MacIOSurfaceLib::IOSurfaceGetBytesPerRow(IOSurfacePtr aIOSurfacePtr) {
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return sBytesPerRow(aIOSurfacePtr);
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}
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size_t MacIOSurfaceLib::IOSurfaceGetPropertyMaximum(CFStringRef property) {
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return sGetPropertyMaximum(property);
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}
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IOReturn MacIOSurfaceLib::IOSurfaceLock(IOSurfacePtr aIOSurfacePtr,
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uint32_t options, uint32_t* seed) {
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return sLock(aIOSurfacePtr, options, seed);
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}
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IOReturn MacIOSurfaceLib::IOSurfaceUnlock(IOSurfacePtr aIOSurfacePtr,
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uint32_t options, uint32_t *seed) {
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return sUnlock(aIOSurfacePtr, options, seed);
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}
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void MacIOSurfaceLib::IOSurfaceIncrementUseCount(IOSurfacePtr aIOSurfacePtr) {
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sIncrementUseCount(aIOSurfacePtr);
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}
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void MacIOSurfaceLib::IOSurfaceDecrementUseCount(IOSurfacePtr aIOSurfacePtr) {
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sDecrementUseCount(aIOSurfacePtr);
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}
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CGLError MacIOSurfaceLib::CGLTexImageIOSurface2D(CGLContextObj ctxt,
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GLenum target, GLenum internalFormat,
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GLsizei width, GLsizei height,
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GLenum format, GLenum type,
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IOSurfacePtr ioSurface, GLuint plane) {
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return sTexImage(ctxt, target, internalFormat, width, height,
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format, type, ioSurface, plane);
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}
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IOSurfacePtr MacIOSurfaceLib::CVPixelBufferGetIOSurface(CVPixelBufferRef aPixelBuffer) {
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return sCVPixelBufferGetIOSurface(aPixelBuffer);
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}
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CGContextRef MacIOSurfaceLib::IOSurfaceContextCreate(IOSurfacePtr aIOSurfacePtr,
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unsigned aWidth, unsigned aHeight,
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unsigned aBitsPerComponent, unsigned aBytes,
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CGColorSpaceRef aColorSpace, CGBitmapInfo bitmapInfo) {
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if (!sIOSurfaceContextCreate)
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return nullptr;
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return sIOSurfaceContextCreate(aIOSurfacePtr, aWidth, aHeight, aBitsPerComponent, aBytes, aColorSpace, bitmapInfo);
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}
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CGImageRef MacIOSurfaceLib::IOSurfaceContextCreateImage(CGContextRef aContext) {
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if (!sIOSurfaceContextCreateImage)
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return nullptr;
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return sIOSurfaceContextCreateImage(aContext);
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}
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IOSurfacePtr MacIOSurfaceLib::IOSurfaceContextGetSurface(CGContextRef aContext) {
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if (!sIOSurfaceContextGetSurface)
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return nullptr;
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return sIOSurfaceContextGetSurface(aContext);
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}
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CFStringRef MacIOSurfaceLib::GetIOConst(const char* symbole) {
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CFStringRef *address = (CFStringRef*)dlsym(sIOSurfaceFramework, symbole);
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if (!address)
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return nullptr;
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return *address;
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}
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void MacIOSurfaceLib::LoadLibrary() {
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if (isLoaded) {
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return;
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}
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isLoaded = true;
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sIOSurfaceFramework = dlopen(IOSURFACE_FRAMEWORK_PATH,
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RTLD_LAZY | RTLD_LOCAL);
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sOpenGLFramework = dlopen(OPENGL_FRAMEWORK_PATH,
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RTLD_LAZY | RTLD_LOCAL);
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sCoreGraphicsFramework = dlopen(COREGRAPHICS_FRAMEWORK_PATH,
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RTLD_LAZY | RTLD_LOCAL);
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sCoreVideoFramework = dlopen(COREVIDEO_FRAMEWORK_PATH,
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RTLD_LAZY | RTLD_LOCAL);
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if (!sIOSurfaceFramework || !sOpenGLFramework || !sCoreGraphicsFramework ||
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!sCoreVideoFramework) {
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if (sIOSurfaceFramework)
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dlclose(sIOSurfaceFramework);
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if (sOpenGLFramework)
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dlclose(sOpenGLFramework);
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if (sCoreGraphicsFramework)
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dlclose(sCoreGraphicsFramework);
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if (sCoreVideoFramework)
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dlclose(sCoreVideoFramework);
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sIOSurfaceFramework = nullptr;
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sOpenGLFramework = nullptr;
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sCoreGraphicsFramework = nullptr;
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sCoreVideoFramework = nullptr;
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return;
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}
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kPropWidth = GetIOConst("kIOSurfaceWidth");
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kPropHeight = GetIOConst("kIOSurfaceHeight");
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kPropBytesPerElem = GetIOConst("kIOSurfaceBytesPerElement");
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kPropBytesPerRow = GetIOConst("kIOSurfaceBytesPerRow");
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kPropIsGlobal = GetIOConst("kIOSurfaceIsGlobal");
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sCreate = GET_IOSYM(sCreate, "IOSurfaceCreate");
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sGetID = GET_IOSYM(sGetID, "IOSurfaceGetID");
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sWidth = GET_IOSYM(sWidth, "IOSurfaceGetWidth");
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sHeight = GET_IOSYM(sHeight, "IOSurfaceGetHeight");
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sBytesPerRow = GET_IOSYM(sBytesPerRow, "IOSurfaceGetBytesPerRow");
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sGetPropertyMaximum = GET_IOSYM(sGetPropertyMaximum, "IOSurfaceGetPropertyMaximum");
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sLookup = GET_IOSYM(sLookup, "IOSurfaceLookup");
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sLock = GET_IOSYM(sLock, "IOSurfaceLock");
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sUnlock = GET_IOSYM(sUnlock, "IOSurfaceUnlock");
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sIncrementUseCount =
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GET_IOSYM(sIncrementUseCount, "IOSurfaceIncrementUseCount");
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sDecrementUseCount =
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GET_IOSYM(sDecrementUseCount, "IOSurfaceDecrementUseCount");
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sGetBaseAddress = GET_IOSYM(sGetBaseAddress, "IOSurfaceGetBaseAddress");
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sGetBaseAddressOfPlane =
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GET_IOSYM(sGetBaseAddressOfPlane, "IOSurfaceGetBaseAddressOfPlane");
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sPlaneCount = GET_IOSYM(sPlaneCount, "IOSurfaceGetPlaneCount");
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sTexImage = GET_CGLSYM(sTexImage, "CGLTexImageIOSurface2D");
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sCGContextGetTypePtr = (unsigned int (*)(CGContext*))dlsym(RTLD_DEFAULT, "CGContextGetType");
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sCVPixelBufferGetIOSurface =
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GET_CVSYM(sCVPixelBufferGetIOSurface, "CVPixelBufferGetIOSurface");
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// Optional symbols
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sIOSurfaceContextCreate = GET_CGSYM(sIOSurfaceContextCreate, "CGIOSurfaceContextCreate");
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sIOSurfaceContextCreateImage = GET_CGSYM(sIOSurfaceContextCreateImage, "CGIOSurfaceContextCreateImage");
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sIOSurfaceContextGetSurface = GET_CGSYM(sIOSurfaceContextGetSurface, "CGIOSurfaceContextGetSurface");
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if (!sCreate || !sGetID || !sLookup || !sTexImage || !sGetBaseAddress ||
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!sGetBaseAddressOfPlane || !sPlaneCount ||
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!kPropWidth || !kPropHeight || !kPropBytesPerElem || !kPropIsGlobal ||
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!sLock || !sUnlock || !sIncrementUseCount || !sDecrementUseCount ||
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!sWidth || !sHeight || !kPropBytesPerRow ||
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!sBytesPerRow || !sGetPropertyMaximum || !sCVPixelBufferGetIOSurface) {
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CloseLibrary();
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}
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}
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void MacIOSurfaceLib::CloseLibrary() {
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if (sIOSurfaceFramework) {
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dlclose(sIOSurfaceFramework);
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}
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if (sOpenGLFramework) {
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dlclose(sOpenGLFramework);
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}
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if (sCoreVideoFramework) {
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dlclose(sCoreVideoFramework);
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}
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sIOSurfaceFramework = nullptr;
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sOpenGLFramework = nullptr;
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sCoreVideoFramework = nullptr;
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}
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MacIOSurface::MacIOSurface(const void* aIOSurfacePtr,
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double aContentsScaleFactor, bool aHasAlpha)
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: mIOSurfacePtr(aIOSurfacePtr)
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, mContentsScaleFactor(aContentsScaleFactor)
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, mHasAlpha(aHasAlpha)
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{
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CFRetain(mIOSurfacePtr);
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IncrementUseCount();
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}
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MacIOSurface::~MacIOSurface() {
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DecrementUseCount();
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CFRelease(mIOSurfacePtr);
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}
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TemporaryRef<MacIOSurface> MacIOSurface::CreateIOSurface(int aWidth, int aHeight,
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double aContentsScaleFactor,
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bool aHasAlpha) {
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if (!MacIOSurfaceLib::isInit() || aContentsScaleFactor <= 0)
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return nullptr;
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CFMutableDictionaryRef props = ::CFDictionaryCreateMutable(
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kCFAllocatorDefault, 4,
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&kCFTypeDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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if (!props)
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return nullptr;
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MOZ_ASSERT((size_t)aWidth <= GetMaxWidth());
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MOZ_ASSERT((size_t)aHeight <= GetMaxHeight());
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int32_t bytesPerElem = 4;
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size_t intScaleFactor = ceil(aContentsScaleFactor);
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aWidth *= intScaleFactor;
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aHeight *= intScaleFactor;
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CFNumberRef cfWidth = ::CFNumberCreate(nullptr, kCFNumberSInt32Type, &aWidth);
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CFNumberRef cfHeight = ::CFNumberCreate(nullptr, kCFNumberSInt32Type, &aHeight);
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CFNumberRef cfBytesPerElem = ::CFNumberCreate(nullptr, kCFNumberSInt32Type, &bytesPerElem);
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::CFDictionaryAddValue(props, MacIOSurfaceLib::kPropWidth,
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cfWidth);
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::CFRelease(cfWidth);
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::CFDictionaryAddValue(props, MacIOSurfaceLib::kPropHeight,
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cfHeight);
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::CFRelease(cfHeight);
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::CFDictionaryAddValue(props, MacIOSurfaceLib::kPropBytesPerElem,
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cfBytesPerElem);
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::CFRelease(cfBytesPerElem);
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::CFDictionaryAddValue(props, MacIOSurfaceLib::kPropIsGlobal,
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kCFBooleanTrue);
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IOSurfacePtr surfaceRef = MacIOSurfaceLib::IOSurfaceCreate(props);
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::CFRelease(props);
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if (!surfaceRef)
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return nullptr;
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RefPtr<MacIOSurface> ioSurface = new MacIOSurface(surfaceRef, aContentsScaleFactor, aHasAlpha);
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if (!ioSurface) {
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::CFRelease(surfaceRef);
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return nullptr;
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}
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// Release the IOSurface because MacIOSurface retained it
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CFRelease(surfaceRef);
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return ioSurface.forget();
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}
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TemporaryRef<MacIOSurface> MacIOSurface::LookupSurface(IOSurfaceID aIOSurfaceID,
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double aContentsScaleFactor,
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bool aHasAlpha) {
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if (!MacIOSurfaceLib::isInit() || aContentsScaleFactor <= 0)
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return nullptr;
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IOSurfacePtr surfaceRef = MacIOSurfaceLib::IOSurfaceLookup(aIOSurfaceID);
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if (!surfaceRef)
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return nullptr;
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RefPtr<MacIOSurface> ioSurface = new MacIOSurface(surfaceRef, aContentsScaleFactor, aHasAlpha);
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if (!ioSurface) {
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::CFRelease(surfaceRef);
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return nullptr;
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}
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// Release the IOSurface because MacIOSurface retained it
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CFRelease(surfaceRef);
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return ioSurface.forget();
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}
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IOSurfaceID MacIOSurface::GetIOSurfaceID() {
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return MacIOSurfaceLib::IOSurfaceGetID(mIOSurfacePtr);
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}
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void* MacIOSurface::GetBaseAddress() {
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return MacIOSurfaceLib::IOSurfaceGetBaseAddress(mIOSurfacePtr);
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}
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void* MacIOSurface::GetBaseAddressOfPlane(size_t aPlaneIndex)
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{
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return MacIOSurfaceLib::IOSurfaceGetBaseAddressOfPlane(mIOSurfacePtr,
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aPlaneIndex);
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}
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size_t MacIOSurface::GetWidth() {
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size_t intScaleFactor = ceil(mContentsScaleFactor);
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return GetDevicePixelWidth() / intScaleFactor;
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}
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size_t MacIOSurface::GetHeight() {
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size_t intScaleFactor = ceil(mContentsScaleFactor);
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return GetDevicePixelHeight() / intScaleFactor;
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}
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size_t MacIOSurface::GetPlaneCount() {
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return MacIOSurfaceLib::IOSurfaceGetPlaneCount(mIOSurfacePtr);
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}
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/*static*/ size_t MacIOSurface::GetMaxWidth() {
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if (!MacIOSurfaceLib::isInit())
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return -1;
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return MacIOSurfaceLib::IOSurfaceGetPropertyMaximum(MacIOSurfaceLib::kPropWidth);
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}
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/*static*/ size_t MacIOSurface::GetMaxHeight() {
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if (!MacIOSurfaceLib::isInit())
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return -1;
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return MacIOSurfaceLib::IOSurfaceGetPropertyMaximum(MacIOSurfaceLib::kPropHeight);
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}
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size_t MacIOSurface::GetDevicePixelWidth() {
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return MacIOSurfaceLib::IOSurfaceGetWidth(mIOSurfacePtr);
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}
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size_t MacIOSurface::GetDevicePixelHeight() {
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return MacIOSurfaceLib::IOSurfaceGetHeight(mIOSurfacePtr);
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}
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size_t MacIOSurface::GetBytesPerRow() {
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return MacIOSurfaceLib::IOSurfaceGetBytesPerRow(mIOSurfacePtr);
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}
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void MacIOSurface::IncrementUseCount() {
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MacIOSurfaceLib::IOSurfaceIncrementUseCount(mIOSurfacePtr);
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}
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void MacIOSurface::DecrementUseCount() {
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MacIOSurfaceLib::IOSurfaceDecrementUseCount(mIOSurfacePtr);
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}
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#define READ_ONLY 0x1
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void MacIOSurface::Lock() {
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MacIOSurfaceLib::IOSurfaceLock(mIOSurfacePtr, READ_ONLY, nullptr);
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}
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void MacIOSurface::Unlock() {
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MacIOSurfaceLib::IOSurfaceUnlock(mIOSurfacePtr, READ_ONLY, nullptr);
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}
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#include "SourceSurfaceRawData.h"
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using mozilla::gfx::SourceSurface;
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using mozilla::gfx::SourceSurfaceRawData;
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using mozilla::gfx::IntSize;
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using mozilla::gfx::SurfaceFormat;
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TemporaryRef<SourceSurface>
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MacIOSurface::GetAsSurface() {
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Lock();
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size_t bytesPerRow = GetBytesPerRow();
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size_t ioWidth = GetDevicePixelWidth();
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size_t ioHeight = GetDevicePixelHeight();
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unsigned char* ioData = (unsigned char*)GetBaseAddress();
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unsigned char* dataCpy = (unsigned char*)malloc(bytesPerRow*ioHeight);
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for (size_t i = 0; i < ioHeight; i++) {
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memcpy(dataCpy + i * bytesPerRow,
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ioData + i * bytesPerRow, ioWidth * 4);
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}
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Unlock();
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SurfaceFormat format = HasAlpha() ? mozilla::gfx::SurfaceFormat::B8G8R8A8 :
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mozilla::gfx::SurfaceFormat::B8G8R8X8;
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RefPtr<SourceSurfaceRawData> surf = new SourceSurfaceRawData();
|
|
surf->InitWrappingData(dataCpy, IntSize(ioWidth, ioHeight), bytesPerRow, format, true);
|
|
|
|
return surf.forget();
|
|
}
|
|
|
|
CGLError
|
|
MacIOSurface::CGLTexImageIOSurface2D(CGLContextObj ctx)
|
|
{
|
|
return MacIOSurfaceLib::CGLTexImageIOSurface2D(ctx,
|
|
GL_TEXTURE_RECTANGLE_ARB,
|
|
HasAlpha() ? GL_RGBA : GL_RGB,
|
|
GetDevicePixelWidth(),
|
|
GetDevicePixelHeight(),
|
|
GL_BGRA,
|
|
GL_UNSIGNED_INT_8_8_8_8_REV,
|
|
mIOSurfacePtr, 0);
|
|
}
|
|
|
|
static
|
|
CGColorSpaceRef CreateSystemColorSpace() {
|
|
CGColorSpaceRef cspace = ::CGDisplayCopyColorSpace(::CGMainDisplayID());
|
|
if (!cspace) {
|
|
cspace = ::CGColorSpaceCreateDeviceRGB();
|
|
}
|
|
return cspace;
|
|
}
|
|
|
|
CGContextRef MacIOSurface::CreateIOSurfaceContext() {
|
|
CGColorSpaceRef cspace = CreateSystemColorSpace();
|
|
CGContextRef ref = MacIOSurfaceLib::IOSurfaceContextCreate(mIOSurfacePtr,
|
|
GetDevicePixelWidth(),
|
|
GetDevicePixelHeight(),
|
|
8, 32, cspace, 0x2002);
|
|
::CGColorSpaceRelease(cspace);
|
|
return ref;
|
|
}
|
|
|
|
CGImageRef MacIOSurface::CreateImageFromIOSurfaceContext(CGContextRef aContext) {
|
|
if (!MacIOSurfaceLib::isInit())
|
|
return nullptr;
|
|
|
|
return MacIOSurfaceLib::IOSurfaceContextCreateImage(aContext);
|
|
}
|
|
|
|
TemporaryRef<MacIOSurface> MacIOSurface::IOSurfaceContextGetSurface(CGContextRef aContext,
|
|
double aContentsScaleFactor,
|
|
bool aHasAlpha) {
|
|
if (!MacIOSurfaceLib::isInit() || aContentsScaleFactor <= 0)
|
|
return nullptr;
|
|
|
|
IOSurfacePtr surfaceRef = MacIOSurfaceLib::IOSurfaceContextGetSurface(aContext);
|
|
if (!surfaceRef)
|
|
return nullptr;
|
|
|
|
RefPtr<MacIOSurface> ioSurface = new MacIOSurface(surfaceRef, aContentsScaleFactor, aHasAlpha);
|
|
if (!ioSurface) {
|
|
::CFRelease(surfaceRef);
|
|
return nullptr;
|
|
}
|
|
return ioSurface.forget();
|
|
}
|
|
|
|
|
|
CGContextType GetContextType(CGContextRef ref)
|
|
{
|
|
if (!MacIOSurfaceLib::isInit() || !MacIOSurfaceLib::sCGContextGetTypePtr)
|
|
return CG_CONTEXT_TYPE_UNKNOWN;
|
|
|
|
unsigned int type = MacIOSurfaceLib::sCGContextGetTypePtr(ref);
|
|
if (type == CG_CONTEXT_TYPE_BITMAP) {
|
|
return CG_CONTEXT_TYPE_BITMAP;
|
|
} else if (type == CG_CONTEXT_TYPE_IOSURFACE) {
|
|
return CG_CONTEXT_TYPE_IOSURFACE;
|
|
} else {
|
|
return CG_CONTEXT_TYPE_UNKNOWN;
|
|
}
|
|
}
|
|
|
|
|