169 lines
4.2 KiB
C++
169 lines
4.2 KiB
C++
#ifndef STAR_IMAGE_PROCESSING_HPP
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#define STAR_IMAGE_PROCESSING_HPP
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#include "StarList.hpp"
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#include "StarRect.hpp"
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#include "StarJson.hpp"
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namespace Star {
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STAR_CLASS(Image);
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STAR_EXCEPTION(ImageOperationException, StarException);
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Image scaleNearest(Image const& srcImage, Vec2F const& scale);
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Image scaleBilinear(Image const& srcImage, Vec2F const& scale);
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Image scaleBicubic(Image const& srcImage, Vec2F const& scale);
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StringList colorDirectivesFromConfig(JsonArray const& directives);
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String paletteSwapDirectivesFromConfig(Json const& swaps);
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struct NullImageOperation {
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};
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struct ErrorImageOperation {
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std::exception_ptr exception;
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};
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struct HueShiftImageOperation {
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// Specify hue shift angle as -360 to 360 rather than -1 to 1
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static HueShiftImageOperation hueShiftDegrees(float degrees);
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// value here is normalized to 1.0
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float hueShiftAmount;
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};
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struct SaturationShiftImageOperation {
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// Specify saturation shift as amount normalized to 100
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static SaturationShiftImageOperation saturationShift100(float amount);
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// value here is normalized to 1.0
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float saturationShiftAmount;
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};
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struct BrightnessMultiplyImageOperation {
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// Specify brightness multiply as amount where 0 means "no change" and 100
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// means "x2" and -100 means "x0"
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static BrightnessMultiplyImageOperation brightnessMultiply100(float amount);
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float brightnessMultiply;
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};
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// Fades R G and B channels to the given color by the given amount, ignores A
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struct FadeToColorImageOperation {
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FadeToColorImageOperation(Vec3B color, float amount);
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Vec3B color;
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float amount;
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Array<uint8_t, 256> rTable;
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Array<uint8_t, 256> gTable;
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Array<uint8_t, 256> bTable;
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};
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// Applies two FadeToColor operations in alternating rows to produce a scanline effect
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struct ScanLinesImageOperation {
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FadeToColorImageOperation fade1;
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FadeToColorImageOperation fade2;
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};
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// Sets RGB values to the given color, and ignores the alpha channel
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struct SetColorImageOperation {
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Vec3B color;
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};
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typedef HashMap<Vec4B, Vec4B> ColorReplaceMap;
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struct ColorReplaceImageOperation {
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ColorReplaceMap colorReplaceMap;
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};
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struct AlphaMaskImageOperation {
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enum MaskMode {
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Additive,
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Subtractive
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};
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MaskMode mode;
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StringList maskImages;
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Vec2I offset;
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};
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struct BlendImageOperation {
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enum BlendMode {
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Multiply,
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Screen
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};
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BlendMode mode;
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StringList blendImages;
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Vec2I offset;
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};
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struct MultiplyImageOperation {
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Vec4B color;
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};
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struct BorderImageOperation {
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unsigned pixels;
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Vec4B startColor;
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Vec4B endColor;
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bool outlineOnly;
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bool includeTransparent;
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};
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struct ScaleImageOperation {
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enum Mode {
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Nearest,
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Bilinear,
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Bicubic
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};
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Mode mode;
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Vec2F scale;
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};
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struct CropImageOperation {
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RectI subset;
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};
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struct FlipImageOperation {
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enum Mode {
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FlipX,
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FlipY,
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FlipXY
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};
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Mode mode;
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};
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typedef Variant<NullImageOperation, ErrorImageOperation, HueShiftImageOperation, SaturationShiftImageOperation, BrightnessMultiplyImageOperation, FadeToColorImageOperation,
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ScanLinesImageOperation, SetColorImageOperation, ColorReplaceImageOperation, AlphaMaskImageOperation, BlendImageOperation,
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MultiplyImageOperation, BorderImageOperation, ScaleImageOperation, CropImageOperation, FlipImageOperation> ImageOperation;
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ImageOperation imageOperationFromString(StringView string);
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String imageOperationToString(ImageOperation const& operation);
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void parseImageOperations(StringView params, function<void(ImageOperation&&)> outputter);
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// Each operation is assumed to be separated by '?', with parameters
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// separated by ';' or '='
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List<ImageOperation> parseImageOperations(StringView params);
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// Each operation separated by '?', returns string with leading '?'
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String printImageOperations(List<ImageOperation> const& operations);
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void addImageOperationReferences(ImageOperation const& operation, StringList& out);
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StringList imageOperationReferences(List<ImageOperation> const& operations);
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typedef function<Image const*(String const& refName)> ImageReferenceCallback;
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void processImageOperation(ImageOperation const& operation, Image& input, ImageReferenceCallback refCallback = {});
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Image processImageOperations(List<ImageOperation> const& operations, Image input, ImageReferenceCallback refCallback = {});
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}
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#endif
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