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https://github.com/libretro/beetle-pce-fast-libretro.git
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125 lines
2.7 KiB
C++
125 lines
2.7 KiB
C++
#ifndef __MDFN_SURFACE_H
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#define __MDFN_SURFACE_H
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#if defined(FRONTEND_SUPPORTS_RGB565)
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/* 16bit color - RGB565 */
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#define RED_MASK 0xf800
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#define GREEN_MASK 0x7e0
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#define BLUE_MASK 0x1f
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#define ALPHA_MASK 0x2000
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#define RED_EXPAND 3
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#define GREEN_EXPAND 2
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#define BLUE_EXPAND 3
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#define RED_SHIFT 11
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#define GREEN_SHIFT 5
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#define BLUE_SHIFT 0
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#define MAKECOLOR(r, g, b, a) (((r >> RED_EXPAND) << RED_SHIFT) | ((g >> GREEN_EXPAND) << GREEN_SHIFT) | ((b >> BLUE_EXPAND) << BLUE_SHIFT))
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#else
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/* 16bit color - RGB555 */
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#define RED_MASK 0x7c00
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#define GREEN_MASK 0x3e0
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#define BLUE_MASK 0x1f
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#define RED_EXPAND 3
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#define GREEN_EXPAND 3
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#define BLUE_EXPAND 3
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#define RED_SHIFT 10
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#define GREEN_SHIFT 5
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#define BLUE_SHIFT 0
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#define MAKECOLOR(r, g, b, a) (((r >> RED_EXPAND) << RED_SHIFT) | ((g >> GREEN_EXPAND) << GREEN_SHIFT) | ((b >> BLUE_EXPAND) << BLUE_SHIFT))
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#endif
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struct MDFN_PaletteEntry
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{
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uint8 r, g, b;
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};
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typedef struct
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{
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int32 x, y, w, h;
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} MDFN_Rect;
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enum
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{
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MDFN_COLORSPACE_RGB = 0,
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MDFN_COLORSPACE_YCbCr = 1,
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MDFN_COLORSPACE_YUV = 2, // TODO, maybe.
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};
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class MDFN_PixelFormat
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{
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public:
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MDFN_PixelFormat();
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MDFN_PixelFormat(const unsigned int p_colorspace, const uint8 p_rs, const uint8 p_gs, const uint8 p_bs, const uint8 p_as);
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unsigned int bpp;
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unsigned int colorspace;
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union
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{
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uint8 Rshift; // Bit position of the lowest bit of the red component
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uint8 Yshift;
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};
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union
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{
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uint8 Gshift; // [...] green component
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uint8 Ushift;
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uint8 Cbshift;
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};
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union
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{
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uint8 Bshift; // [...] blue component
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uint8 Vshift;
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uint8 Crshift;
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};
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uint8 Ashift; // [...] alpha component.
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// Creates a color value for the surface corresponding to the 8-bit R/G/B/A color passed.
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INLINE uint32 MakeColor(uint8 r, uint8 g, uint8 b, uint8 a = 0) const
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{
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return MAKECOLOR(r, g, b, a);
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}
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}; // MDFN_PixelFormat;
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// Supports 32-bit RGBA
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// 16-bit is WIP
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class MDFN_Surface //typedef struct
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{
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public:
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MDFN_Surface();
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MDFN_Surface(void *const p_pixels, const uint32 p_width, const uint32 p_height, const uint32 p_pitchinpix, const MDFN_PixelFormat &nf);
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~MDFN_Surface();
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uint16 *pixels16;
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// w, h, and pitch32 should always be > 0
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int32 w;
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int32 h;
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union
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{
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int32 pitch32; // In pixels, not in bytes.
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int32 pitchinpix; // New name, new code should use this.
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};
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MDFN_PaletteEntry *palette;
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MDFN_PixelFormat format;
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void SetFormat(const MDFN_PixelFormat &new_format, bool convert);
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// Creates a value for the surface corresponding to the R/G/B/A color passed.
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INLINE uint32 MakeColor(uint8 r, uint8 g, uint8 b, uint8 a = 0) const
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{
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return MAKECOLOR(r, g, b, a);
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}
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private:
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void Init(void *const p_pixels, const uint32 p_width, const uint32 p_height, const uint32 p_pitchinpix, const MDFN_PixelFormat &nf);
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};
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#endif
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