GraphicsBase.hpp

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#pragma once

#include <Gosu/Platform.hpp>
#include <array>

namespace Gosu
{
    typedef double ZPos;
    
    enum AlphaMode
    {
        AM_DEFAULT,
        AM_INTERPOLATE = AM_DEFAULT,
        AM_ADD,
        AM_MULTIPLY
    };
    
    enum FontFlags
    {
        FF_BOLD         = 1,
        FF_ITALIC       = 2,
        FF_UNDERLINE    = 4,
        FF_COMBINATIONS = 8
    };
    
    enum Alignment
    {
        AL_LEFT,
        AL_RIGHT,
        AL_CENTER,
        AL_JUSTIFY
    };
    
    enum ImageFlags
    {
        IF_SMOOTH = 0,
        
        // Note: No constant for '1', but Gosu treats '1' as if_tileable for
        // backward compatibility reasons (this parameter used to be a bool).
        
        IF_TILEABLE_LEFT   = 1 << 1,
        IF_TILEABLE_TOP    = 1 << 2,
        IF_TILEABLE_RIGHT  = 1 << 3,
        IF_TILEABLE_BOTTOM = 1 << 4,
        IF_TILEABLE        = IF_TILEABLE_LEFT | IF_TILEABLE_TOP | IF_TILEABLE_RIGHT | IF_TILEABLE_BOTTOM,
        
        IF_RETRO           = 1 << 5
    };
    
    typedef std::array<double, 16> Transform;
    Transform translate(double x, double y);
    Transform rotate(double angle, double around_x = 0, double around_y = 0);
    Transform scale(double factor);
    Transform scale(double scale_x, double scale_y, double from_x = 0, double from_y = 0);
    Transform concat(const Transform& lhs, const Transform& rhs);
}