mirror of https://github.com/mgba-emu/mgba.git
327 lines
7.9 KiB
C
327 lines
7.9 KiB
C
/* Copyright (c) 2013-2015 Jeffrey Pfau
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef M_IMAGE_H
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#define M_IMAGE_H
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#include <mgba-util/common.h>
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CXX_GUARD_START
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#ifdef COLOR_16_BIT
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typedef uint16_t color_t;
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#define BYTES_PER_PIXEL 2
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#else
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typedef uint32_t color_t;
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#define BYTES_PER_PIXEL 4
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#endif
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#define M_R5(X) ((X) & 0x1F)
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#define M_G5(X) (((X) >> 5) & 0x1F)
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#define M_B5(X) (((X) >> 10) & 0x1F)
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#define M_R8(X) ((M_R5(X) * 0x21) >> 2)
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#define M_G8(X) ((M_G5(X) * 0x21) >> 2)
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#define M_B8(X) ((M_B5(X) * 0x21) >> 2)
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#define M_RGB5_TO_BGR8(X) ((M_R5(X) << 3) | (M_G5(X) << 11) | (M_B5(X) << 19))
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#define M_RGB5_TO_RGB8(X) ((M_R5(X) << 19) | (M_G5(X) << 11) | (M_B5(X) << 3))
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#define M_RGB8_TO_BGR5(X) ((((X) & 0xF8) >> 3) | (((X) & 0xF800) >> 6) | (((X) & 0xF80000) >> 9))
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#define M_RGB8_TO_RGB5(X) ((((X) & 0xF8) << 7) | (((X) & 0xF800) >> 6) | (((X) & 0xF80000) >> 19))
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#ifndef COLOR_16_BIT
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#define M_COLOR_RED 0x000000FF
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#define M_COLOR_GREEN 0x0000FF00
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#define M_COLOR_BLUE 0x00FF0000
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#define M_COLOR_ALPHA 0xFF000000
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#define M_COLOR_WHITE 0x00FFFFFF
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#define M_RGB8_TO_NATIVE(X) (((X) & 0x00FF00) | (((X) & 0x0000FF) << 16) | (((X) & 0xFF0000) >> 16))
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#elif defined(COLOR_5_6_5)
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#define M_COLOR_RED 0x001F
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#define M_COLOR_GREEN 0x07E0
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#define M_COLOR_BLUE 0xF800
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#define M_COLOR_ALPHA 0x0000
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#define M_COLOR_WHITE 0xFFDF
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#define M_RGB8_TO_NATIVE(X) ((((X) & 0xF8) << 8) | (((X) & 0xFC00) >> 5) | (((X) & 0xF80000) >> 19))
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#else
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#define M_COLOR_RED 0x001F
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#define M_COLOR_GREEN 0x03E0
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#define M_COLOR_BLUE 0x7C00
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#define M_COLOR_ALPHA 0x1000
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#define M_COLOR_WHITE 0x7FFF
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#define M_RGB8_TO_NATIVE(X) M_RGB8_TO_BGR5(X)
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#endif
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enum mColorFormat {
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mCOLOR_XBGR8 = 0x00001,
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mCOLOR_XRGB8 = 0x00002,
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mCOLOR_BGRX8 = 0x00004,
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mCOLOR_RGBX8 = 0x00008,
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mCOLOR_ABGR8 = 0x00010,
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mCOLOR_ARGB8 = 0x00020,
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mCOLOR_BGRA8 = 0x00040,
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mCOLOR_RGBA8 = 0x00080,
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mCOLOR_RGB5 = 0x00100,
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mCOLOR_BGR5 = 0x00200,
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mCOLOR_RGB565 = 0x00400,
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mCOLOR_BGR565 = 0x00800,
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mCOLOR_ARGB5 = 0x01000,
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mCOLOR_ABGR5 = 0x02000,
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mCOLOR_RGBA5 = 0x04000,
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mCOLOR_BGRA5 = 0x08000,
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mCOLOR_RGB8 = 0x10000,
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mCOLOR_BGR8 = 0x20000,
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mCOLOR_L8 = 0x40000,
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mCOLOR_PAL8 = 0x80000,
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mCOLOR_ANY = -1
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};
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#ifndef COLOR_16_BIT
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#define mCOLOR_NATIVE mCOLOR_XBGR8
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#elif !defined(COLOR_5_6_5)
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#define mCOLOR_NATIVE mCOLOR_BGR5
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#else
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#define mCOLOR_NATIVE mCOLOR_RGB565
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#endif
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struct mImage {
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void* data;
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uint32_t* palette;
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unsigned width;
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unsigned height;
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unsigned stride;
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unsigned depth;
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unsigned palSize;
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enum mColorFormat format;
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};
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struct VFile;
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struct mImage* mImageCreate(unsigned width, unsigned height, enum mColorFormat format);
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struct mImage* mImageCreateWithStride(unsigned width, unsigned height, unsigned stride, enum mColorFormat format);
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struct mImage* mImageCreateFromConstBuffer(unsigned width, unsigned height, unsigned stride, enum mColorFormat format, const void* pixels);
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struct mImage* mImageLoad(const char* path);
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struct mImage* mImageLoadVF(struct VFile* vf);
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struct mImage* mImageConvertToFormat(const struct mImage*, enum mColorFormat format);
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void mImageDestroy(struct mImage*);
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bool mImageSave(const struct mImage*, const char* path, const char* format);
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bool mImageSaveVF(const struct mImage*, struct VFile* vf, const char* format);
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uint32_t mImageGetPixel(const struct mImage* image, unsigned x, unsigned y);
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uint32_t mImageGetPixelRaw(const struct mImage* image, unsigned x, unsigned y);
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void mImageSetPixel(struct mImage* image, unsigned x, unsigned y, uint32_t color);
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void mImageSetPixelRaw(struct mImage* image, unsigned x, unsigned y, uint32_t color);
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void mImageSetPaletteSize(struct mImage* image, unsigned count);
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void mImageSetPaletteEntry(struct mImage* image, unsigned index, uint32_t color);
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void mImageBlit(struct mImage* image, const struct mImage* source, int x, int y);
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void mImageComposite(struct mImage* image, const struct mImage* source, int x, int y);
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void mImageCompositeWithAlpha(struct mImage* image, const struct mImage* source, int x, int y, float alpha);
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uint32_t mColorConvert(uint32_t color, enum mColorFormat from, enum mColorFormat to);
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uint32_t mImageColorConvert(uint32_t color, const struct mImage* from, enum mColorFormat to);
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#ifndef PYCPARSE
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static inline unsigned mColorFormatBytes(enum mColorFormat format) {
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switch (format) {
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case mCOLOR_XBGR8:
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case mCOLOR_XRGB8:
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case mCOLOR_BGRX8:
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case mCOLOR_RGBX8:
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case mCOLOR_ABGR8:
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case mCOLOR_ARGB8:
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case mCOLOR_BGRA8:
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case mCOLOR_RGBA8:
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return 4;
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case mCOLOR_RGB5:
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case mCOLOR_BGR5:
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case mCOLOR_RGB565:
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case mCOLOR_BGR565:
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case mCOLOR_ARGB5:
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case mCOLOR_ABGR5:
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case mCOLOR_RGBA5:
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case mCOLOR_BGRA5:
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return 2;
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case mCOLOR_RGB8:
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case mCOLOR_BGR8:
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return 3;
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case mCOLOR_L8:
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case mCOLOR_PAL8:
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return 1;
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case mCOLOR_ANY:
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break;
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}
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return 0;
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}
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static inline bool mColorFormatHasAlpha(enum mColorFormat format) {
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switch (format) {
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case mCOLOR_XBGR8:
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case mCOLOR_XRGB8:
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case mCOLOR_BGRX8:
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case mCOLOR_RGBX8:
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case mCOLOR_RGB5:
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case mCOLOR_BGR5:
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case mCOLOR_RGB565:
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case mCOLOR_BGR565:
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case mCOLOR_RGB8:
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case mCOLOR_BGR8:
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case mCOLOR_L8:
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return false;
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case mCOLOR_ABGR8:
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case mCOLOR_ARGB8:
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case mCOLOR_BGRA8:
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case mCOLOR_RGBA8:
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case mCOLOR_ARGB5:
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case mCOLOR_ABGR5:
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case mCOLOR_RGBA5:
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case mCOLOR_BGRA5:
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case mCOLOR_PAL8:
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return true;
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case mCOLOR_ANY:
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break;
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}
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return false;
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}
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static inline color_t mColorFrom555(uint16_t value) {
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#ifdef COLOR_16_BIT
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#ifdef COLOR_5_6_5
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color_t color = 0;
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color |= (value & 0x001F) << 11;
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color |= (value & 0x03E0) << 1;
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color |= (value & 0x7C00) >> 10;
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#else
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color_t color = value;
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#endif
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#else
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color_t color = M_RGB5_TO_BGR8(value);
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color |= (color >> 5) & 0x070707;
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#endif
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return color;
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}
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ATTRIBUTE_UNUSED static unsigned mColorMix5Bit(int weightA, unsigned colorA, int weightB, unsigned colorB) {
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unsigned c = 0;
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unsigned a, b;
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#ifdef COLOR_16_BIT
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#ifdef COLOR_5_6_5
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a = colorA & 0xF81F;
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b = colorB & 0xF81F;
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a |= (colorA & 0x7C0) << 16;
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b |= (colorB & 0x7C0) << 16;
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c = ((a * weightA + b * weightB) / 16);
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if (c & 0x08000000) {
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c = (c & ~0x0FC00000) | 0x07C00000;
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}
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if (c & 0x0020) {
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c = (c & ~0x003F) | 0x001F;
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}
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if (c & 0x10000) {
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c = (c & ~0x1F800) | 0xF800;
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}
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c = (c & 0xF81F) | ((c >> 16) & 0x07C0);
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#else
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a = colorA & 0x7C1F;
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b = colorB & 0x7C1F;
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a |= (colorA & 0x3E0) << 16;
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b |= (colorB & 0x3E0) << 16;
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c = ((a * weightA + b * weightB) / 16);
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if (c & 0x04000000) {
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c = (c & ~0x07E00000) | 0x03E00000;
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}
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if (c & 0x0020) {
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c = (c & ~0x003F) | 0x001F;
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}
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if (c & 0x8000) {
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c = (c & ~0xF800) | 0x7C00;
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}
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c = (c & 0x7C1F) | ((c >> 16) & 0x03E0);
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#endif
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#else
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a = colorA & 0xFF;
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b = colorB & 0xFF;
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c |= ((a * weightA + b * weightB) / 16) & 0x1FF;
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if (c & 0x00000100) {
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c = 0x000000FF;
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}
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a = colorA & 0xFF00;
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b = colorB & 0xFF00;
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c |= ((a * weightA + b * weightB) / 16) & 0x1FF00;
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if (c & 0x00010000) {
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c = (c & 0x000000FF) | 0x0000FF00;
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}
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a = colorA & 0xFF0000;
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b = colorB & 0xFF0000;
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c |= ((a * weightA + b * weightB) / 16) & 0x1FF0000;
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if (c & 0x01000000) {
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c = (c & 0x0000FFFF) | 0x00FF0000;
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}
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#endif
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return c;
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}
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ATTRIBUTE_UNUSED static uint32_t mColorMixARGB8(uint32_t colorA, uint32_t colorB) {
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uint32_t alpha = colorA >> 24;
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if (!alpha) {
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return colorB;
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}
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uint32_t color = 0;
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uint32_t a, b;
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a = colorA & 0xFF00FF;
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a *= alpha + 1;
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color += (a >> 8) & 0xFF00FF;
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a = colorB & 0xFF00FF;
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a *= 0x100 - alpha;
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color += (a >> 8) & 0xFF00FF;
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if (color & 0x100) {
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color &= ~0xFF;
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color |= 0xFF;
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}
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if (color & 0x1000000) {
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color &= ~0xFF0000;
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color |= 0xFF0000;
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}
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b = 0;
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a = colorA & 0xFF00;
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a *= alpha + 1;
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b += a & 0xFF0000;
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a = colorB & 0xFF00;
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a *= 0x100 - alpha;
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b += a & 0xFF0000;
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if (b & 0x1000000) {
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b &= ~0xFF0000;
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b |= 0xFF0000;
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}
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color |= b >> 8;
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alpha += colorB >> 24;
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if (alpha > 0xFF) {
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color |= 0xFF000000;
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} else {
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color |= alpha << 24;
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}
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return color;
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}
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#endif
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CXX_GUARD_END
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#endif
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