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Diffstat (limited to 'lib/osx_file_icon.mm')
| -rw-r--r-- | lib/osx_file_icon.mm | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/lib/osx_file_icon.mm b/lib/osx_file_icon.mm deleted file mode 100644 index fb3c6490..00000000 --- a/lib/osx_file_icon.mm +++ /dev/null @@ -1,179 +0,0 @@ -// ************************************************************************** -// * This file is part of the FreeFileSync project. It is distributed under * -// * GNU General Public License: http://www.gnu.org/licenses/gpl.html * -// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved * -// ************************************************************************** - -#include "osx_file_icon.h" -#include <zen/osx_throw_exception.h> -#include <zen/scope_guard.h> -#include <zen/basic_math.h> - -namespace -{ -osx::ImageData extractBytes(NSImage* nsImg, int requestedSize) //throw SysError; NSException? -{ - /* - wxBitmap(NSImage*) is not good enough: it calls "[NSBitmapImageRep imageRepWithData:[img TIFFRepresentation]]" - => inefficient: TIFFRepresentation converts all contained images of an NSImage - => lacking: imageRepWithData extracts the first contained image only! - => wxBitmap(NSImage*) is wxCocoa only, deprecated! - => wxWidgets generally is not thread-safe so care must be taken to use wxBitmap from main thread only! (e.g. race-condition on non-atomic ref-count!!!) - - -> we need only a single bitmap at a specific size => extract raw bytes for use with wxImage in a thread-safe way! - */ - - //we choose the Core Graphics solution; for the equivalent App-Kit way see: http://www.cocoabuilder.com/archive/cocoa/193131-is-lockfocus-main-thread-specific.html#193191 - - ZEN_OSX_ASSERT(requestedSize > 0); - NSRect rectProposed = NSMakeRect(0, 0, requestedSize, requestedSize); //this is merely a hint! - - CGImageRef imgRef = [nsImg CGImageForProposedRect:&rectProposed context:nil hints:nil]; - ZEN_OSX_ASSERT(imgRef != NULL); //can this fail? not documented; ownership?? not documented! - - const size_t width = ::CGImageGetWidth (imgRef); - const size_t height = ::CGImageGetHeight(imgRef); - - ZEN_OSX_ASSERT(width > 0 && height > 0 && requestedSize > 0); - - int trgWidth = width; - int trgHeight = height; - - const int maxExtent = std::max(width, height); //don't stretch small images, but shrink large ones instead! - if (requestedSize < maxExtent) - { - trgWidth = width * requestedSize / maxExtent; - trgHeight = height * requestedSize / maxExtent; - } - - CGColorSpaceRef colorSpace = ::CGColorSpaceCreateDeviceRGB(); - ZEN_OSX_ASSERT(colorSpace != NULL); //may fail - ZEN_ON_SCOPE_EXIT(::CGColorSpaceRelease(colorSpace)); - - std::vector<unsigned char> buf(trgWidth* trgHeight * 4); //32-bit ARGB, little endian byte order -> already initialized with 0 = fully transparent - - //supported color spaces: https://developer.apple.com/library/mac/#documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_context/dq_context.html#//apple_ref/doc/uid/TP30001066-CH203-BCIBHHBB - CGContextRef ctxRef = ::CGBitmapContextCreate(&buf[0], //void *data, - trgWidth, //size_t width, - trgHeight, //size_t height, - 8, //size_t bitsPerComponent, - 4 * trgWidth, //size_t bytesPerRow, - colorSpace, //CGColorSpaceRef colorspace, - kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Little); //CGBitmapInfo bitmapInfo - ZEN_OSX_ASSERT(ctxRef != NULL); - ZEN_ON_SCOPE_EXIT(::CGContextRelease(ctxRef)); - - ::CGContextDrawImage(ctxRef, CGRectMake(0, 0, trgWidth, trgHeight), imgRef); //can this fail? not documented - - //::CGContextFlush(ctxRef); //"If you pass [...] a bitmap context, this function does nothing." - - osx::ImageData imgOut(trgWidth, trgHeight); - - auto it = buf.begin(); - auto itOutRgb = imgOut.rgb.begin(); - auto itOutAlpha = imgOut.alpha.begin(); - for (int i = 0; i < trgWidth * trgHeight; ++i) - { - const unsigned char b = *it++; - const unsigned char g = *it++; - const unsigned char r = *it++; - const unsigned char a = *it++; - - //unsigned arithmetics caveat! - auto demultiplex = [&](unsigned char c) { return static_cast<unsigned char>(numeric::confineCpy(a == 0 ? 0 : (c * 255 + a - 1) / a, 0, 255)); }; //=ceil(c * 255 / a) - - *itOutRgb++ = demultiplex(r); - *itOutRgb++ = demultiplex(g); - *itOutRgb++ = demultiplex(b); - *itOutAlpha++ = a; - } - - return imgOut; -} -} - - -osx::ImageData osx::getThumbnail(const char* filename, int requestedSize) //throw SysError -{ - @try - { - @autoreleasepool - { - NSString* nsFile = [NSString stringWithCString:filename encoding:NSUTF8StringEncoding]; - ZEN_OSX_ASSERT(nsFile != nil); //throw SysError; can this fail? not documented - //stringWithCString returns string which is already set to autorelease! - - NSImage* nsImg = [[[NSImage alloc] initWithContentsOfFile:nsFile] autorelease]; - ZEN_OSX_ASSERT(nsImg != nil); //may fail - - return extractBytes(nsImg, requestedSize); //throw SysError - } - } - @catch(NSException* e) - { - throwSysError(e); //throw SysError - } -} - - -osx::ImageData osx::getFileIcon(const char* filename, int requestedSize) //throw SysError -{ - @try - { - @autoreleasepool - { - NSString* nsFile = [NSString stringWithCString:filename encoding:NSUTF8StringEncoding]; - ZEN_OSX_ASSERT(nsFile != nil); //throw SysError; can this fail? not documented - //stringWithCString returns string which is already set to autorelease! - - NSImage* nsImg = [[NSWorkspace sharedWorkspace] iconForFile:nsFile]; - ZEN_OSX_ASSERT(nsImg != nil); //can this fail? not documented - - return extractBytes(nsImg, requestedSize); //throw SysError - } - } - @catch (NSException* e) - { - throwSysError(e); //throw SysError - } -} - - -osx::ImageData osx::getDefaultFileIcon(int requestedSize) //throw SysError -{ - @try - { - @autoreleasepool - { - NSImage* nsImg = [[NSWorkspace sharedWorkspace] iconForFileType:NSFileTypeForHFSTypeCode(kGenericDocumentIcon)]; - //NSImage* nsImg = [[NSWorkspace sharedWorkspace] iconForFileType:@"dat"]; - ZEN_OSX_ASSERT(nsImg != nil); //can this fail? not documented - - return extractBytes(nsImg, requestedSize); //throw SysError - } - } - @catch (NSException* e) - { - throwSysError(e); //throw SysError - } -} - - -osx::ImageData osx::getDefaultFolderIcon(int requestedSize) //throw SysError -{ - @try - { - @autoreleasepool - { - NSImage* nsImg = [NSImage imageNamed:NSImageNameFolder]; - //NSImage* nsImg = [[NSWorkspace sharedWorkspace] iconForFileType:NSFileTypeForHFSTypeCode(kGenericFolderIcon)]; - ZEN_OSX_ASSERT(nsImg != nil); //may fail - - return extractBytes(nsImg, requestedSize); //throw SysError - } - } - @catch (NSException* e) - { - throwSysError(e); //throw SysError - } -} |