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gecko-dev/gfx/thebes/nsCoreAnimationSupport.mm

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:set ts=2 sts=2 sw=2 et cin:
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Benoit Girard <b56girard@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCoreAnimationSupport.h"
#include "nsDebug.h"
#import <QuartzCore/QuartzCore.h>
#include <dlfcn.h>
#define IOSURFACE_FRAMEWORK_PATH \
"/System/Library/Frameworks/IOSurface.framework/IOSurface"
#define OPENGL_FRAMEWORK_PATH \
"/System/Library/Frameworks/OpenGL.framework/OpenGL"
// IOSurface signatures
typedef CFTypeRef IOSurfacePtr;
typedef IOSurfacePtr (*IOSurfaceCreateFunc) (CFDictionaryRef properties);
typedef IOSurfacePtr (*IOSurfaceLookupFunc) (uint32_t io_surface_id);
typedef IOSurfaceID (*IOSurfaceGetIDFunc) (CFTypeRef io_surface);
typedef IOReturn (*IOSurfaceLockFunc) (CFTypeRef io_surface,
uint32_t options,
uint32_t *seed);
typedef IOReturn (*IOSurfaceUnlockFunc) (CFTypeRef io_surface,
uint32_t options,
uint32_t *seed);
typedef void* (*IOSurfaceGetBaseAddressFunc) (CFTypeRef io_surface);
typedef size_t (*IOSurfaceGetWidthFunc) (IOSurfacePtr io_surface);
typedef size_t (*IOSurfaceGetHeightFunc) (IOSurfacePtr io_surface);
typedef size_t (*IOSurfaceGetBytesPerRowFunc) (IOSurfacePtr io_surface);
typedef CGLError (*CGLTexImageIOSurface2DFunc) (CGLContextObj ctxt,
GLenum target, GLenum internalFormat,
GLsizei width, GLsizei height,
GLenum format, GLenum type,
IOSurfacePtr ioSurface, GLuint plane);
#define GET_CONST(const_name) \
((CFStringRef*) dlsym(sIOSurfaceFramework, const_name))
#define GET_IOSYM(dest,sym_name) \
(typeof(dest)) dlsym(sIOSurfaceFramework, sym_name)
#define GET_CGLSYM(dest,sym_name) \
(typeof(dest)) dlsym(sOpenGLFramework, sym_name)
class nsIOSurfaceLib: public nsIOSurface {
public:
static void *sIOSurfaceFramework;
static void *sOpenGLFramework;
static bool isLoaded;
static IOSurfaceCreateFunc sCreate;
static IOSurfaceGetIDFunc sGetID;
static IOSurfaceLookupFunc sLookup;
static IOSurfaceGetBaseAddressFunc sGetBaseAddress;
static IOSurfaceLockFunc sLock;
static IOSurfaceUnlockFunc sUnlock;
static IOSurfaceGetWidthFunc sWidth;
static IOSurfaceGetHeightFunc sHeight;
static IOSurfaceGetBytesPerRowFunc sBytesPerRow;
static CGLTexImageIOSurface2DFunc sTexImage;
static CFStringRef kPropWidth;
static CFStringRef kPropHeight;
static CFStringRef kPropBytesPerElem;
static CFStringRef kPropBytesPerRow;
static CFStringRef kPropIsGlobal;
static bool isInit();
static CFStringRef GetIOConst(const char* symbole);
static IOSurfacePtr IOSurfaceCreate(CFDictionaryRef properties);
static IOSurfacePtr IOSurfaceLookup(IOSurfaceID aIOSurfaceID);
static IOSurfaceID IOSurfaceGetID(IOSurfacePtr aIOSurfacePtr);
static void *IOSurfaceGetBaseAddress(IOSurfacePtr aIOSurfacePtr);
static size_t IOSurfaceGetWidth(IOSurfacePtr aIOSurfacePtr);
static size_t IOSurfaceGetHeight(IOSurfacePtr aIOSurfacePtr);
static size_t IOSurfaceGetBytesPerRow(IOSurfacePtr aIOSurfacePtr);
static IOReturn IOSurfaceLock(IOSurfacePtr aIOSurfacePtr,
uint32_t options, uint32_t *seed);
static IOReturn IOSurfaceUnlock(IOSurfacePtr aIOSurfacePtr,
uint32_t options, uint32_t *seed);
static CGLError CGLTexImageIOSurface2D(CGLContextObj ctxt,
GLenum target, GLenum internalFormat,
GLsizei width, GLsizei height,
GLenum format, GLenum type,
IOSurfacePtr ioSurface, GLuint plane);
static void LoadLibrary();
static void CloseLibrary();
// Static deconstructor
static class LibraryUnloader {
public:
~LibraryUnloader() {
CloseLibrary();
}
} sLibraryUnloader;
};
nsIOSurfaceLib::LibraryUnloader nsIOSurfaceLib::sLibraryUnloader;
bool nsIOSurfaceLib::isLoaded = false;
void* nsIOSurfaceLib::sIOSurfaceFramework;
void* nsIOSurfaceLib::sOpenGLFramework;
IOSurfaceCreateFunc nsIOSurfaceLib::sCreate;
IOSurfaceGetIDFunc nsIOSurfaceLib::sGetID;
IOSurfaceLookupFunc nsIOSurfaceLib::sLookup;
IOSurfaceGetBaseAddressFunc nsIOSurfaceLib::sGetBaseAddress;
IOSurfaceGetHeightFunc nsIOSurfaceLib::sWidth;
IOSurfaceGetWidthFunc nsIOSurfaceLib::sHeight;
IOSurfaceGetBytesPerRowFunc nsIOSurfaceLib::sBytesPerRow;
IOSurfaceLockFunc nsIOSurfaceLib::sLock;
IOSurfaceUnlockFunc nsIOSurfaceLib::sUnlock;
CGLTexImageIOSurface2DFunc nsIOSurfaceLib::sTexImage;
CFStringRef nsIOSurfaceLib::kPropWidth;
CFStringRef nsIOSurfaceLib::kPropHeight;
CFStringRef nsIOSurfaceLib::kPropBytesPerElem;
CFStringRef nsIOSurfaceLib::kPropBytesPerRow;
CFStringRef nsIOSurfaceLib::kPropIsGlobal;
bool nsIOSurfaceLib::isInit() {
// Guard against trying to reload the library
// if it is not available.
if (!isLoaded)
LoadLibrary();
if (!sIOSurfaceFramework) {
NS_ERROR("nsIOSurfaceLib failed to initialize");
}
return sIOSurfaceFramework;
}
IOSurfacePtr nsIOSurfaceLib::IOSurfaceCreate(CFDictionaryRef properties) {
return sCreate(properties);
}
IOSurfacePtr nsIOSurfaceLib::IOSurfaceLookup(IOSurfaceID aIOSurfaceID) {
return sLookup(aIOSurfaceID);
}
IOSurfaceID nsIOSurfaceLib::IOSurfaceGetID(IOSurfacePtr aIOSurfacePtr) {
return sGetID(aIOSurfacePtr);
}
void* nsIOSurfaceLib::IOSurfaceGetBaseAddress(IOSurfacePtr aIOSurfacePtr) {
return sGetBaseAddress(aIOSurfacePtr);
}
size_t nsIOSurfaceLib::IOSurfaceGetWidth(IOSurfacePtr aIOSurfacePtr) {
return sWidth(aIOSurfacePtr);
}
size_t nsIOSurfaceLib::IOSurfaceGetHeight(IOSurfacePtr aIOSurfacePtr) {
return sHeight(aIOSurfacePtr);
}
size_t nsIOSurfaceLib::IOSurfaceGetBytesPerRow(IOSurfacePtr aIOSurfacePtr) {
return sBytesPerRow(aIOSurfacePtr);
}
IOReturn nsIOSurfaceLib::IOSurfaceLock(IOSurfacePtr aIOSurfacePtr,
uint32_t options, uint32_t *seed) {
return sLock(aIOSurfacePtr, options, seed);
}
IOReturn nsIOSurfaceLib::IOSurfaceUnlock(IOSurfacePtr aIOSurfacePtr,
uint32_t options, uint32_t *seed) {
return sUnlock(aIOSurfacePtr, options, seed);
}
CGLError nsIOSurfaceLib::CGLTexImageIOSurface2D(CGLContextObj ctxt,
GLenum target, GLenum internalFormat,
GLsizei width, GLsizei height,
GLenum format, GLenum type,
IOSurfacePtr ioSurface, GLuint plane) {
return sTexImage(ctxt, target, internalFormat, width, height,
format, type, ioSurface, plane);
}
CFStringRef nsIOSurfaceLib::GetIOConst(const char* symbole) {
CFStringRef *address = (CFStringRef*)dlsym(sIOSurfaceFramework, symbole);
if (!address)
return nsnull;
return *address;
}
void nsIOSurfaceLib::LoadLibrary() {
if (isLoaded) {
return;
}
isLoaded = true;
sIOSurfaceFramework = dlopen(IOSURFACE_FRAMEWORK_PATH,
RTLD_LAZY | RTLD_LOCAL);
sOpenGLFramework = dlopen(OPENGL_FRAMEWORK_PATH,
RTLD_LAZY | RTLD_LOCAL);
if (!sIOSurfaceFramework) {
return;
}
if (!sOpenGLFramework) {
dlclose(sIOSurfaceFramework);
sIOSurfaceFramework = nsnull;
return;
}
kPropWidth = GetIOConst("kIOSurfaceWidth");
kPropHeight = GetIOConst("kIOSurfaceHeight");
kPropBytesPerElem = GetIOConst("kIOSurfaceBytesPerElement");
kPropBytesPerRow = GetIOConst("kIOSurfaceBytesPerRow");
kPropIsGlobal = GetIOConst("kIOSurfaceIsGlobal");
sCreate = GET_IOSYM(sCreate, "IOSurfaceCreate");
sGetID = GET_IOSYM(sGetID, "IOSurfaceGetID");
sWidth = GET_IOSYM(sWidth, "IOSurfaceGetWidth");
sHeight = GET_IOSYM(sHeight, "IOSurfaceGetHeight");
sBytesPerRow = GET_IOSYM(sBytesPerRow, "IOSurfaceGetBytesPerRow");
sLookup = GET_IOSYM(sLookup, "IOSurfaceLookup");
sLock = GET_IOSYM(sLock, "IOSurfaceLock");
sUnlock = GET_IOSYM(sUnlock, "IOSurfaceUnlock");
sGetBaseAddress = GET_IOSYM(sGetBaseAddress, "IOSurfaceGetBaseAddress");
sTexImage = GET_CGLSYM(sTexImage, "CGLTexImageIOSurface2D");
if (!sCreate || !sGetID || !sLookup || !sTexImage || !sGetBaseAddress ||
!kPropWidth || !kPropHeight || !kPropBytesPerElem || !kPropIsGlobal ||
!sLock || !sUnlock || !sWidth || !sHeight || !kPropBytesPerRow ||
!sBytesPerRow) {
CloseLibrary();
}
}
void nsIOSurfaceLib::CloseLibrary() {
if (sIOSurfaceFramework) {
dlclose(sIOSurfaceFramework);
}
if (sOpenGLFramework) {
dlclose(sOpenGLFramework);
}
sIOSurfaceFramework = nsnull;
sOpenGLFramework = nsnull;
}
nsIOSurface* nsIOSurface::CreateIOSurface(int aWidth, int aHeight) {
if (!nsIOSurfaceLib::isInit())
return nsnull;
CFMutableDictionaryRef props = ::CFDictionaryCreateMutable(
kCFAllocatorDefault, 4,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
if (!props)
return nsnull;
int32_t bytesPerElem = 4;
CFNumberRef cfWidth = ::CFNumberCreate(NULL, kCFNumberSInt32Type, &aWidth);
CFNumberRef cfHeight = ::CFNumberCreate(NULL, kCFNumberSInt32Type, &aHeight);
CFNumberRef cfBytesPerElem = ::CFNumberCreate(NULL, kCFNumberSInt32Type, &bytesPerElem);
::CFDictionaryAddValue(props, nsIOSurfaceLib::kPropWidth,
cfWidth);
::CFRelease(cfWidth);
::CFDictionaryAddValue(props, nsIOSurfaceLib::kPropHeight,
cfHeight);
::CFRelease(cfHeight);
::CFDictionaryAddValue(props, nsIOSurfaceLib::kPropBytesPerElem,
cfBytesPerElem);
::CFRelease(cfBytesPerElem);
::CFDictionaryAddValue(props, nsIOSurfaceLib::kPropIsGlobal,
kCFBooleanTrue);
IOSurfacePtr surfaceRef = nsIOSurfaceLib::IOSurfaceCreate(props);
::CFRelease(props);
if (!surfaceRef)
return nsnull;
nsIOSurface* ioSurface = new nsIOSurface(surfaceRef);
if (!ioSurface) {
::CFRelease(surfaceRef);
return nsnull;
}
return ioSurface;
}
nsIOSurface* nsIOSurface::LookupSurface(IOSurfaceID aIOSurfaceID) {
if (!nsIOSurfaceLib::isInit())
return nsnull;
IOSurfacePtr surfaceRef = nsIOSurfaceLib::IOSurfaceLookup(aIOSurfaceID);
if (!surfaceRef)
return nsnull;
// IOSurfaceLookup does not retain the object for us,
// we want IOSurfacePtr to remain for the lifetime of
// nsIOSurface.
CFRetain(surfaceRef);
nsIOSurface* ioSurface = new nsIOSurface(surfaceRef);
if (!ioSurface) {
::CFRelease(ioSurface);
return nsnull;
}
return ioSurface;
}
IOSurfaceID nsIOSurface::GetIOSurfaceID() {
return nsIOSurfaceLib::IOSurfaceGetID(mIOSurfacePtr);
}
void* nsIOSurface::GetBaseAddress() {
return nsIOSurfaceLib::IOSurfaceGetBaseAddress(mIOSurfacePtr);
}
size_t nsIOSurface::GetWidth() {
return nsIOSurfaceLib::IOSurfaceGetWidth(mIOSurfacePtr);
}
size_t nsIOSurface::GetHeight() {
return nsIOSurfaceLib::IOSurfaceGetHeight(mIOSurfacePtr);
}
size_t nsIOSurface::GetBytesPerRow() {
return nsIOSurfaceLib::IOSurfaceGetBytesPerRow(mIOSurfacePtr);
}
#define READ_ONLY 0x1
void nsIOSurface::Lock() {
nsIOSurfaceLib::IOSurfaceLock(mIOSurfacePtr, READ_ONLY, NULL);
}
void nsIOSurface::Unlock() {
nsIOSurfaceLib::IOSurfaceUnlock(mIOSurfacePtr, READ_ONLY, NULL);
}
nsCARenderer::~nsCARenderer() {
Destroy();
}
CGColorSpaceRef CreateSystemColorSpace() {
CMProfileRef system_profile = nsnull;
CGColorSpaceRef cspace = nsnull;
if (::CMGetSystemProfile(&system_profile) == noErr) {
// Create a colorspace with the systems profile
cspace = ::CGColorSpaceCreateWithPlatformColorSpace(system_profile);
::CMCloseProfile(system_profile);
} else {
// Default to generic
cspace = ::CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
}
return cspace;
}
void cgdata_release_callback(void *aCGData, const void *data, size_t size) {
if (aCGData) {
free(aCGData);
}
}
void nsCARenderer::Destroy() {
if (mCARenderer) {
CARenderer* caRenderer = (CARenderer*)mCARenderer;
// Bug 556453:
// Explicitly remove the layer from the renderer
// otherwise it does not always happen right away.
caRenderer.layer = nsnull;
[caRenderer release];
}
if (mPixelBuffer) {
::CGLDestroyPBuffer((CGLPBufferObj)mPixelBuffer);
}
if (mOpenGLContext) {
if (mFBO || mIOTexture) {
// Release these resources with the context that allocated them
CGLContextObj oldContext = ::CGLGetCurrentContext();
::CGLSetCurrentContext(mOpenGLContext);
if (mIOTexture) {
::glDeleteTextures(1, &mIOTexture);
}
if (mFBO) {
::glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
::glDeleteFramebuffersEXT(1, &mFBO);
}
if (oldContext)
::CGLSetCurrentContext(oldContext);
}
::CGLDestroyContext((CGLContextObj)mOpenGLContext);
}
if (mCGImage) {
::CGImageRelease(mCGImage);
}
if (mIOSurface) {
delete mIOSurface;
}
// mCGData is deallocated by cgdata_release_callback
mCARenderer = nil;
mPixelBuffer = nsnull;
mOpenGLContext = nsnull;
mCGImage = nsnull;
mIOSurface = nsnull;
mFBO = nsnull;
mIOTexture = nsnull;
}
nsresult nsCARenderer::SetupRenderer(void *aCALayer, int aWidth, int aHeight) {
if (aWidth == 0 || aHeight == 0)
return NS_ERROR_FAILURE;
CALayer* layer = (CALayer*)aCALayer;
CARenderer* caRenderer = nsnull;
CGLPixelFormatAttribute attributes[] = {
kCGLPFANoRecovery,
kCGLPFAAccelerated,
kCGLPFAPBuffer,
kCGLPFADepthSize, (CGLPixelFormatAttribute)24,
(CGLPixelFormatAttribute)0
};
if (!mIOSurface) {
CGLError result = ::CGLCreatePBuffer(aWidth, aHeight,
GL_TEXTURE_2D, GL_RGBA, 0, &mPixelBuffer);
if (result != kCGLNoError) {
Destroy();
return NS_ERROR_FAILURE;
}
}
GLint screen;
CGLPixelFormatObj format;
if (::CGLChoosePixelFormat(attributes, &format, &screen) != kCGLNoError) {
Destroy();
return NS_ERROR_FAILURE;
}
if (::CGLCreateContext(format, nsnull, &mOpenGLContext) != kCGLNoError) {
Destroy();
return NS_ERROR_FAILURE;
}
::CGLDestroyPixelFormat(format);
caRenderer = [[CARenderer rendererWithCGLContext:mOpenGLContext
options:nil] retain];
mCARenderer = caRenderer;
if (caRenderer == nil) {
Destroy();
return NS_ERROR_FAILURE;
}
[layer setBounds:CGRectMake(0, 0, aWidth, aHeight)];
[layer setPosition:CGPointMake(aWidth/2.0, aHeight/2.0)];
caRenderer.layer = layer;
caRenderer.bounds = CGRectMake(0, 0, aWidth, aHeight);
// We either target rendering to a CGImage or IOSurface.
if (!mIOSurface) {
mCGData = malloc(aWidth*aHeight*4);
if (!mCGData) {
Destroy();
}
memset(mCGData, 0, aWidth*aHeight*4);
CGDataProviderRef dataProvider = nsnull;
dataProvider = ::CGDataProviderCreateWithData(mCGData,
mCGData, aHeight*aWidth*4,
cgdata_release_callback);
if (!dataProvider) {
cgdata_release_callback(mCGData, mCGData, aHeight*aWidth*4);
Destroy();
return NS_ERROR_FAILURE;
}
CGColorSpaceRef colorSpace = CreateSystemColorSpace();
mCGImage = ::CGImageCreate(aWidth, aHeight, 8, 32, aWidth * 4, colorSpace,
kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host,
dataProvider, NULL, true, kCGRenderingIntentDefault);
::CGDataProviderRelease(dataProvider);
if (colorSpace) {
::CGColorSpaceRelease(colorSpace);
}
if (!mCGImage) {
Destroy();
return NS_ERROR_FAILURE;
}
} else {
CGLContextObj oldContext = ::CGLGetCurrentContext();
::CGLSetCurrentContext(mOpenGLContext);
// Create the IOSurface mapped texture.
::glGenTextures(1, &mIOTexture);
::glBindTexture(GL_TEXTURE_RECTANGLE_ARB, mIOTexture);
::glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
::glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
nsIOSurfaceLib::CGLTexImageIOSurface2D(mOpenGLContext, GL_TEXTURE_RECTANGLE_ARB,
GL_RGBA, aWidth, aHeight,
GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
mIOSurface->mIOSurfacePtr, 0);
::glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
// Create the fbo
::glGenFramebuffersEXT(1, &mFBO);
::glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFBO);
::glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_RECTANGLE_ARB, mIOTexture, 0);
// Make sure that the Framebuffer configuration is supported on the client machine
GLenum fboStatus;
fboStatus = ::glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (fboStatus != GL_FRAMEBUFFER_COMPLETE_EXT) {
NS_ERROR("FBO not supported");
if (oldContext)
::CGLSetCurrentContext(oldContext);
Destroy();
return NS_ERROR_FAILURE;
}
if (oldContext)
::CGLSetCurrentContext(oldContext);
}
CGLContextObj oldContext = ::CGLGetCurrentContext();
::CGLSetCurrentContext(mOpenGLContext);
::glViewport(0.0, 0.0, aWidth, aHeight);
::glMatrixMode(GL_PROJECTION);
::glLoadIdentity();
::glOrtho (0.0, aWidth, 0.0, aHeight, -1, 1);
// Render upside down to speed up CGContextDrawImage
::glTranslatef(0.0f, aHeight, 0.0);
::glScalef(1.0, -1.0, 1.0);
GLenum result = ::glGetError();
if (result != GL_NO_ERROR) {
NS_ERROR("Unexpected OpenGL Error");
Destroy();
if (oldContext)
::CGLSetCurrentContext(oldContext);
return NS_ERROR_FAILURE;
}
if (oldContext)
::CGLSetCurrentContext(oldContext);
return NS_OK;
}
void nsCARenderer::AttachIOSurface(nsIOSurface *aSurface) {
if (mIOSurface &&
aSurface->GetIOSurfaceID() == mIOSurface->GetIOSurfaceID()) {
delete aSurface;
return;
}
if (mCARenderer) {
// We are attaching a larger IOSurface, we need to
// resize our elements.
Destroy();
}
if (mIOSurface)
delete mIOSurface;
mIOSurface = aSurface;
}
nsresult nsCARenderer::Render(int aWidth, int aHeight,
CGImageRef *aOutCGImage) {
if (!aOutCGImage && !mIOSurface) {
NS_ERROR("No target destination for rendering");
} else if (aOutCGImage) {
// We are expected to return a CGImageRef, we will set
// it to NULL in case we fail before the image is ready.
*aOutCGImage = NULL;
}
if (aWidth == 0 || aHeight == 0)
return NS_OK;
if (!mCARenderer) {
return NS_ERROR_FAILURE;
}
CARenderer* caRenderer = (CARenderer*)mCARenderer;
int renderer_width = caRenderer.bounds.size.width;
int renderer_height = caRenderer.bounds.size.height;
if (renderer_width != aWidth || renderer_height != aHeight) {
// XXX: This should be optimized to not rescale the buffer
// if we are resizing down.
CALayer* caLayer = [caRenderer layer];
Destroy();
if (SetupRenderer(caLayer, aWidth, aHeight) != NS_OK) {
return NS_ERROR_FAILURE;
}
caRenderer = (CARenderer*)mCARenderer;
}
CGLContextObj oldContext = ::CGLGetCurrentContext();
::CGLSetCurrentContext(mOpenGLContext);
if (!mIOSurface) {
::CGLSetPBuffer(mOpenGLContext, mPixelBuffer, 0, 0, 0);
}
GLenum result = ::glGetError();
if (result != GL_NO_ERROR) {
NS_ERROR("Unexpected OpenGL Error");
Destroy();
if (oldContext)
::CGLSetCurrentContext(oldContext);
return NS_ERROR_FAILURE;
}
::glClearColor(0.0, 0.0, 0.0, 0.0);
::glClear(GL_COLOR_BUFFER_BIT);
double caTime = ::CACurrentMediaTime();
[caRenderer beginFrameAtTime:caTime timeStamp:NULL];
[caRenderer addUpdateRect:CGRectMake(0,0, aWidth, aHeight)];
[caRenderer render];
[caRenderer endFrame];
// Read the data back either to the IOSurface or mCGImage.
if (mIOSurface) {
::glFlush();
} else {
::glPixelStorei(GL_PACK_ALIGNMENT, 4);
::glPixelStorei(GL_PACK_ROW_LENGTH, 0);
::glPixelStorei(GL_PACK_SKIP_ROWS, 0);
::glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
::glReadPixels(0.0f, 0.0f, aWidth, aHeight,
GL_BGRA, GL_UNSIGNED_BYTE,
mCGData);
*aOutCGImage = mCGImage;
}
if (oldContext) {
::CGLSetCurrentContext(oldContext);
}
return NS_OK;
}
nsresult nsCARenderer::DrawSurfaceToCGContext(CGContextRef aContext,
nsIOSurface *surf,
CGColorSpaceRef aColorSpace,
int aX, int aY,
int aWidth, int aHeight) {
surf->Lock();
size_t bytesPerRow = surf->GetBytesPerRow();
size_t ioWidth = surf->GetWidth();
size_t ioHeight = surf->GetHeight();
void* ioData = surf->GetBaseAddress();
CGDataProviderRef dataProvider = ::CGDataProviderCreateWithData(ioData,
ioData, ioHeight*(bytesPerRow)*4,
NULL); //No release callback
if (!dataProvider) {
surf->Unlock();
return NS_ERROR_FAILURE;
}
// We get rendering glitches if we use a width/height that falls
// outside of the IOSurface.
if (aWidth > ioWidth - aX)
aWidth = ioWidth - aX;
if (aHeight > ioHeight - aY)
aHeight = ioHeight - aY;
CGImageRef cgImage = ::CGImageCreate(ioWidth, ioHeight, 8, 32, bytesPerRow,
aColorSpace, kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host,
dataProvider, NULL, true, kCGRenderingIntentDefault);
::CGDataProviderRelease(dataProvider);
if (!cgImage) {
surf->Unlock();
return NS_ERROR_FAILURE;
}
CGImageRef subImage = ::CGImageCreateWithImageInRect(cgImage,
::CGRectMake(aX, aY, aWidth, aHeight));
if (!subImage) {
::CGImageRelease(cgImage);
surf->Unlock();
return NS_ERROR_FAILURE;
}
::CGContextScaleCTM(aContext, 1.0f, -1.0f);
::CGContextDrawImage(aContext, CGRectMake(aX, -aY-aHeight, aWidth, aHeight), subImage);
::CGImageRelease(subImage);
::CGImageRelease(cgImage);
surf->Unlock();
return NS_OK;
}
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