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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,96 @@ | ||
| /* | ||
| * Copyright 2022 Rive | ||
| */ | ||
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| #include "cg_skia_factory.hpp" | ||
| #include "rive/core/type_conversions.hpp" | ||
| #include <vector> | ||
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| #ifdef RIVE_BUILD_FOR_APPLE | ||
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| #if defined(RIVE_BUILD_FOR_OSX) | ||
| #include <ApplicationServices/ApplicationServices.h> | ||
| #elif defined(RIVE_BUILD_FOR_IOS) | ||
| #include <CoreGraphics/CoreGraphics.h> | ||
| #include <ImageIO/ImageIO.h> | ||
| #endif | ||
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| // Helper that remembers to call CFRelease when an object goes out of scope. | ||
| template <typename T> class AutoCF { | ||
| T m_Obj; | ||
| public: | ||
| AutoCF(T obj) : m_Obj(obj) {} | ||
| ~AutoCF() { if (m_Obj) CFRelease(m_Obj); } | ||
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| operator T() const { return m_Obj; } | ||
| operator bool() const { return m_Obj != nullptr; } | ||
| T get() const { return m_Obj; } | ||
| }; | ||
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| using namespace rive; | ||
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| std::vector<uint8_t> CGSkiaFactory::platformDecode(Span<const uint8_t> span, | ||
| SkiaFactory::ImageInfo* info) { | ||
| std::vector<uint8_t> pixels; | ||
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| AutoCF data = CFDataCreateWithBytesNoCopy(nullptr, span.data(), span.size(), nullptr); | ||
| if (!data) { | ||
| return pixels; | ||
| } | ||
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| AutoCF source = CGImageSourceCreateWithData(data, nullptr); | ||
| if (!source) { | ||
| return pixels; | ||
| } | ||
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| AutoCF image = CGImageSourceCreateImageAtIndex(source, 0, nullptr); | ||
| if (!image) { | ||
| return pixels; | ||
| } | ||
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| bool isOpaque = false; | ||
| switch (CGImageGetAlphaInfo(image.get())) { | ||
| case kCGImageAlphaNone: | ||
| case kCGImageAlphaNoneSkipFirst: | ||
| case kCGImageAlphaNoneSkipLast: | ||
| isOpaque = true; | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
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| // Now create a drawing context to produce RGBA pixels | ||
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| const size_t bitsPerComponent = 8; | ||
| CGBitmapInfo cgInfo = kCGBitmapByteOrder32Big; // rgba | ||
| if (isOpaque) { | ||
| cgInfo |= kCGImageAlphaNoneSkipLast; | ||
| } else { | ||
| cgInfo |= kCGImageAlphaPremultipliedLast; // premul | ||
| } | ||
| const size_t width = CGImageGetWidth(image); | ||
| const size_t height = CGImageGetHeight(image); | ||
| const size_t rowBytes = width * 4; // 4 bytes per pixel | ||
| const size_t size = rowBytes * height; | ||
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| pixels.resize(size); | ||
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| AutoCF cs = CGColorSpaceCreateDeviceRGB(); | ||
| AutoCF cg = CGBitmapContextCreate(pixels.data(), width, height, bitsPerComponent, rowBytes, cs, cgInfo); | ||
| if (!cg) { | ||
| pixels.clear(); | ||
| return pixels; | ||
| } | ||
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| CGContextSetBlendMode(cg, kCGBlendModeCopy); | ||
| CGContextDrawImage(cg, CGRectMake(0, 0, width, height), image); | ||
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| info->alphaType = isOpaque ? AlphaType::opaque : AlphaType::premul; | ||
| info->colorType = ColorType::rgba; | ||
| info->width = castTo<uint32_t>(width); | ||
| info->height = castTo<uint32_t>(height); | ||
| info->rowBytes = rowBytes; | ||
| return pixels; | ||
| }; | ||
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| #endif // RIVE_BUILD_FOR_APPLE |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| /* | ||
| * Copyright 2022 Rive | ||
| */ | ||
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| #ifndef _RIVE_CGSkiaFactory_HPP_ | ||
| #define _RIVE_CGSkiaFactory_HPP_ | ||
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| #include "skia_factory.hpp" | ||
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| namespace rive { | ||
| struct CGSkiaFactory : public SkiaFactory { | ||
| std::vector<uint8_t> platformDecode(Span<const uint8_t>, | ||
| SkiaFactory::ImageInfo*) override; | ||
| }; | ||
| } // namespace | ||
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| #endif // _RIVE_CGSkiaFactory_HPP_ |