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93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
/*
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* IImage.h, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#pragma once
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VCMI_LIB_NAMESPACE_BEGIN
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class PlayerColor;
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class Rect;
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class Point;
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VCMI_LIB_NAMESPACE_END
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struct SDL_Surface;
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struct SDL_Color;
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class ColorFilter;
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/// Defines which blit method will be selected when image is used for rendering
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enum class EImageBlitMode : uint8_t
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{
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/// Image can have no transparency and can be only used as background
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OPAQUE,
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/// Image can have only a single color as transparency and has no semi-transparent areas
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COLORKEY,
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/// Image might have full alpha transparency range, e.g. shadows
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ALPHA
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};
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/*
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* Base class for images, can be used for non-animation pictures as well
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*/
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class IImage
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{
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public:
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using SpecialPalette = std::array<SDL_Color, 7>;
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//draws image on surface "where" at position
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virtual void draw(SDL_Surface * where, int posX = 0, int posY = 0, const Rect * src = nullptr) const = 0;
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virtual void draw(SDL_Surface * where, const Rect * dest, const Rect * src) const = 0;
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virtual std::shared_ptr<IImage> scaleFast(const Point & size) const = 0;
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virtual void exportBitmap(const boost::filesystem::path & path) const = 0;
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//Change palette to specific player
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virtual void playerColored(PlayerColor player)=0;
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//set special color for flag
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virtual void setFlagColor(PlayerColor player)=0;
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//test transparency of specific pixel
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virtual bool isTransparent(const Point & coords) const = 0;
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virtual Point dimensions() const = 0;
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int width() const;
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int height() const;
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//only indexed bitmaps, 16 colors maximum
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virtual void shiftPalette(uint32_t firstColorID, uint32_t colorsToMove, uint32_t distanceToMove) = 0;
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virtual void adjustPalette(const ColorFilter & shifter, size_t colorsToSkip) = 0;
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virtual void resetPalette(int colorID) = 0;
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virtual void resetPalette() = 0;
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virtual void setAlpha(uint8_t value) = 0;
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virtual void setBlitMode(EImageBlitMode mode) = 0;
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//only indexed bitmaps with 7 special colors
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virtual void setSpecialPallete(const SpecialPalette & SpecialPalette) = 0;
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virtual void horizontalFlip() = 0;
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virtual void verticalFlip() = 0;
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IImage();
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virtual ~IImage();
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/// loads image from specified file. Returns 0-sized images on failure
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static std::shared_ptr<IImage> createFromFile( const std::string & path );
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static std::shared_ptr<IImage> createFromFile( const std::string & path, EImageBlitMode mode );
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/// temporary compatibility method. Creates IImage from existing SDL_Surface
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/// Surface will be shared, called must still free it with SDL_FreeSurface
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static std::shared_ptr<IImage> createFromSurface( SDL_Surface * source );
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};
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