Enable hsl shifting of named images
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2 changed files with 50 additions and 5 deletions
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@ -7,23 +7,50 @@
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#import <Cocoa/Cocoa.h>
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#include "base/strings/sys_string_conversions.h"
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#include "ui/gfx/color_utils.h"
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#include "ui/gfx/image/image.h"
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#include "ui/gfx/image/image_skia.h"
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#include "ui/gfx/image/image_skia_operations.h"
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namespace atom {
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namespace api {
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NSData* bufferFromNSImage(NSImage* image) {
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CGImageRef ref = [image CGImageForProposedRect:nil context:nil hints:nil];
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NSBitmapImageRep* rep = [[NSBitmapImageRep alloc] initWithCGImage:ref];
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[rep setSize:[image size]];
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return [rep representationUsingType:NSPNGFileType properties:[[NSDictionary alloc] init]];
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}
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double safeShift(double in, double def) {
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if (in >= 0 || in <= 1 || in == def) return in;
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return def;
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}
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mate::Handle<NativeImage> NativeImage::CreateFromNamedImage(
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mate::Arguments* args, const std::string& name) {
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@autoreleasepool {
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std::vector<double> hsl_shift;
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NSImage* image = [NSImage imageNamed:base::SysUTF8ToNSString(name)];
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if (!image.valid) {
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return CreateEmpty(args->isolate());
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}
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CGImageRef ref = [image CGImageForProposedRect:nil context:nil hints:nil];
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NSBitmapImageRep* rep = [[NSBitmapImageRep alloc] initWithCGImage:ref];
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[rep setSize:[image size]];
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NSData* pngData = [rep representationUsingType:NSPNGFileType properties:[[NSDictionary alloc] init]];
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NSData* pngData = bufferFromNSImage(image);
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if (args->GetNext(&hsl_shift) && hsl_shift.size() == 3) {
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gfx::Image gfxImage = gfx::Image::CreateFrom1xPNGBytes(
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reinterpret_cast<const unsigned char*>((char *) [pngData bytes]), [pngData length]);
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color_utils::HSL shift = {
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safeShift(hsl_shift[0], -1),
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safeShift(hsl_shift[1], 0.5),
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safeShift(hsl_shift[2], 0.5)
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};
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pngData = bufferFromNSImage(gfx::Image(
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gfx::ImageSkiaOperations::CreateHSLShiftedImage(
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gfxImage.AsImageSkia(), shift)).CopyNSImage());
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}
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return CreateFromPNG(args->isolate(), (char *) [pngData bytes], [pngData length]);
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}
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