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| // Copyright (c) 2013-2016 mogemimi. Distributed under the MIT license. | ||
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| #pragma once | ||
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| #include "Pomdog/Basic/Export.hpp" | ||
| #include "Pomdog/Experimental/Image/Image.hpp" | ||
| #include <memory> | ||
| #include <vector> | ||
| #include <chrono> | ||
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| namespace Pomdog { | ||
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| using GifDuration = std::chrono::duration<long long, std::ratio<1LL, 100LL>>; | ||
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| class POMDOG_EXPORT GifImageFrame final { | ||
| public: | ||
| std::shared_ptr<Image> Image; | ||
| GifDuration Delay; | ||
| }; | ||
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| class POMDOG_EXPORT GifImage final { | ||
| public: | ||
| std::vector<GifImageFrame> Frames; | ||
| int LoopCount; | ||
| }; | ||
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| } // namespace Pomdog |
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| // Copyright (c) 2013-2016 mogemimi. Distributed under the MIT license. | ||
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| #pragma once | ||
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| #include "Pomdog/Basic/Export.hpp" | ||
| #include "Pomdog/Experimental/Image/GifImage.hpp" | ||
| #include "Pomdog/Utility/Optional.hpp" | ||
| #include <vector> | ||
| #include <string> | ||
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| namespace Pomdog { | ||
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| class POMDOG_EXPORT GifLoader final { | ||
| public: | ||
| static Optional<GifImage> Open(const std::string& filePath); | ||
| }; | ||
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| } // namespace Pomdog |
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| // Copyright (c) 2013-2016 mogemimi. Distributed under the MIT license. | ||
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| #pragma once | ||
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| #include "Pomdog/Basic/Export.hpp" | ||
| #include "Pomdog/Math/Color.hpp" | ||
| #include <vector> | ||
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| namespace Pomdog { | ||
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| class POMDOG_EXPORT Image final { | ||
| public: | ||
| Image(int width, int height); | ||
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| Image() = delete; | ||
| Image(const Image&) = delete; | ||
| Image(Image &&); | ||
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| Image & operator=(const Image&) = delete; | ||
| Image & operator=(Image &&); | ||
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| int GetWidth() const noexcept; | ||
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| int GetHeight() const noexcept; | ||
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| const Color* GetData() const; | ||
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| void SetData(const Color* pixelData); | ||
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| void SetData(std::vector<Color> && pixelData); | ||
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| const Color& GetPixel(int x, int y) const; | ||
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| void SetPixel(int x, int y, const Color& color); | ||
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| void Fill(const Color& color); | ||
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| void PremultiplyAlpha(); | ||
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| private: | ||
| std::vector<Color> data; | ||
| int width; | ||
| int height; | ||
| }; | ||
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| } // namespace Pomdog |
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| // Copyright (c) 2013-2016 mogemimi. Distributed under the MIT license. | ||
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| #include "Pomdog/Experimental/Image/GifImageLoader.hpp" | ||
| #include "Pomdog/Utility/Assert.hpp" | ||
| #include <gif_lib.h> | ||
| #include <functional> | ||
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| namespace Pomdog { | ||
| namespace { | ||
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| void DumpExtensions( | ||
| int extensionBlockCount, | ||
| ExtensionBlock* extensionBlocks, | ||
| const std::function<void(int)>& findLoopCount) | ||
| { | ||
| const auto extensionBlockEnd = extensionBlocks + extensionBlockCount; | ||
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| for (auto extensionBlock = extensionBlocks; extensionBlock != extensionBlockEnd; ++extensionBlock) { | ||
| POMDOG_ASSERT(extensionBlock < extensionBlockEnd); | ||
| if (extensionBlock->Function == APPLICATION_EXT_FUNC_CODE && | ||
| (std::memcmp(extensionBlock->Bytes, "NETSCAPE2.0", 11) == 0) && | ||
| (extensionBlock->Bytes[10] == 0x01)) { | ||
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| ++extensionBlock; | ||
| GifByteType x1 = extensionBlock->Bytes[1]; | ||
| GifByteType x2 = extensionBlock->Bytes[2]; | ||
| int loopCount = (static_cast<int>(x2) << 8) | static_cast<int>(x1); | ||
| findLoopCount(loopCount); | ||
| } | ||
| } | ||
| } | ||
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| } // unnamed namespace | ||
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| Optional<GifImage> GifLoader::Open(const std::string& filePath) | ||
| { | ||
| if (filePath.empty()) { | ||
| // error | ||
| return NullOpt; | ||
| } | ||
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| int gifError = 0; | ||
| auto gifFileIn = std::shared_ptr<GifFileType>( | ||
| DGifOpenFileName(filePath.c_str(), &gifError), | ||
| [](GifFileType* p) { | ||
| if (p != nullptr) { | ||
| DGifCloseFile(p, nullptr); | ||
| } | ||
| }); | ||
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| if (gifError != 0) { | ||
| //throw CannotOpenGifFileException{}; | ||
| return NullOpt; | ||
| } | ||
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| if (DGifSlurp(gifFileIn.get()) == GIF_ERROR) { | ||
| //throw CannotOpenGifFileException{}; | ||
| return NullOpt; | ||
| } | ||
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| GifImage result; | ||
| result.LoopCount = 0; | ||
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| DumpExtensions( | ||
| gifFileIn->ExtensionBlockCount, | ||
| gifFileIn->ExtensionBlocks, | ||
| [&](int loopCountIn) { | ||
| result.LoopCount = loopCountIn; | ||
| }); | ||
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| std::shared_ptr<Pomdog::Image const> prevImage; | ||
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| for (int index = 0; index < gifFileIn->ImageCount; ++index) { | ||
| auto& saveImage = gifFileIn->SavedImages[index]; | ||
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| const int imageNumber = ((index + 1) % gifFileIn->ImageCount); | ||
| GraphicsControlBlock gcb; | ||
| bool hasGCB = false; | ||
| if (DGifSavedExtensionToGCB(gifFileIn.get(), imageNumber, &gcb) == GIF_OK) { | ||
| hasGCB = true; | ||
| } | ||
| else { | ||
| hasGCB = false; | ||
| } | ||
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| const auto colorMap = saveImage.ImageDesc.ColorMap | ||
| ? saveImage.ImageDesc.ColorMap | ||
| : gifFileIn->SColorMap; | ||
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| auto img = std::make_shared<Pomdog::Image>(gifFileIn->SWidth, gifFileIn->SHeight); | ||
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| if (hasGCB && gcb.DisposalMode == DISPOSE_BACKGROUND) { | ||
| auto fillColor = [&]() -> Color { | ||
| if (hasGCB && (gcb.TransparentColor != NO_TRANSPARENT_COLOR)) { | ||
| GifColorType& color = colorMap->Colors[gcb.TransparentColor]; | ||
| return Color{color.Red, color.Green, color.Blue, 0}; | ||
| } | ||
| return Color{255, 255, 255, 255}; | ||
| }(); | ||
| img->Fill(fillColor); | ||
| } | ||
| else if (hasGCB && gcb.DisposalMode == DISPOSE_DO_NOT) { | ||
| if (index > 0) { | ||
| // Fill color | ||
| POMDOG_ASSERT(prevImage); | ||
| POMDOG_ASSERT(img->GetWidth() == prevImage->GetWidth()); | ||
| POMDOG_ASSERT(img->GetHeight() == prevImage->GetHeight()); | ||
| img->SetData(prevImage->GetData()); | ||
| } | ||
| } | ||
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| const int width = saveImage.ImageDesc.Width; | ||
| const int height = saveImage.ImageDesc.Height; | ||
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| for (int x = 0; x < width; ++x) { | ||
| for (int y = 0; y < height; ++y) { | ||
| int colorIndex = saveImage.RasterBits[x + width * y]; | ||
| assert(colorIndex < colorMap->ColorCount); | ||
| GifColorType& colorFromMap = | ||
| colorMap->Colors[colorIndex]; | ||
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| bool isTransparent = [&]{ | ||
| if (!hasGCB) { | ||
| return false; | ||
| } | ||
| return gcb.TransparentColor == colorIndex; | ||
| }(); | ||
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| GifByteType alpha = isTransparent ? 0x00 : 0xFF; | ||
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| auto rgba = Color{ | ||
| colorFromMap.Red, | ||
| colorFromMap.Green, | ||
| colorFromMap.Blue, | ||
| alpha | ||
| }; | ||
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| if (!isTransparent) { | ||
| img->SetPixel( | ||
| saveImage.ImageDesc.Left + x, | ||
| saveImage.ImageDesc.Top + y, | ||
| rgba); | ||
| } | ||
| } | ||
| } | ||
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| DumpExtensions( | ||
| gifFileIn->ExtensionBlockCount, | ||
| gifFileIn->ExtensionBlocks, | ||
| [&](int loopCountIn) { | ||
| result.LoopCount = loopCountIn; | ||
| }); | ||
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| const GifDuration sourceDelay{hasGCB ? gcb.DelayTime : 0}; | ||
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| GifImageFrame frame; | ||
| frame.Image = img; | ||
| frame.Delay = sourceDelay; | ||
| result.Frames.push_back(std::move(frame)); | ||
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| prevImage = img; | ||
| } | ||
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| return result; | ||
| } | ||
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| } // namespace Pomdog |
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