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mgba/include/mgba-util/image.h

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