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decomp blit
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DizzyEggg
parent
5162393c16
commit
edf9f706c4
211
src/blit.c
Normal file
211
src/blit.c
Normal file
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#include "global.h"
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// this file's functions
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void BlitBitmapRect4Bit(struct Bitmap *src, struct Bitmap *dst, u16 srcX, u16 srcY, u16 dstX, u16 dstY, u16 width, u16 height, u8 colorKey);
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void BlitBitmapRect4BitWithoutColorKey(struct Bitmap *src, struct Bitmap *dst, u16 srcX, u16 srcY, u16 dstX, u16 dstY, u16 width, u16 height)
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{
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BlitBitmapRect4Bit(src, dst, srcX, srcY, dstX, dstY, width, height, 0xFF);
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}
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void BlitBitmapRect4Bit(struct Bitmap *src, struct Bitmap *dst, u16 srcX, u16 srcY, u16 dstX, u16 dstY, u16 width, u16 height, u8 colorKey)
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{
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s32 xEnd;
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s32 yEnd;
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s32 multiplierSrcY;
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s32 multiplierDstY;
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s32 loopSrcY, loopDstY;
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s32 loopSrcX, loopDstX;
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u8 *pixelsSrc;
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u8 *pixelsDst;
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s32 toOrr;
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s32 toAnd;
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s32 toShift;
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if (dst->width - dstX < width)
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xEnd = (dst->width - dstX) + srcX;
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else
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xEnd = srcX + width;
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if (dst->height - dstY < height)
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yEnd = (dst->height - dstY) + srcY;
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else
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yEnd = height + srcY;
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multiplierSrcY = (src->width + (src->width & 7)) >> 3;
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multiplierDstY = (dst->width + (dst->width & 7)) >> 3;
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if (colorKey == 0xFF)
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{
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for (loopSrcY = srcY, loopDstY = dstY; loopSrcY < yEnd; loopSrcY++, loopDstY++)
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{
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for (loopSrcX = srcX, loopDstX = dstX; loopSrcX < xEnd; loopSrcX++, loopDstX++)
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{
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pixelsSrc = src->pixels + ((loopSrcX >> 1) & 3) + ((loopSrcX >> 3) << 5) + (((loopSrcY >> 3) * multiplierSrcY) << 5) + ((u32)(loopSrcY << 0x1d) >> 0x1B);
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pixelsDst = dst->pixels + ((loopDstX >> 1) & 3) + ((loopDstX >> 3) << 5) + (((loopDstY >> 3) * multiplierDstY) << 5) + ((u32)(loopDstY << 0x1d) >> 0x1B);
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toOrr = ((*pixelsSrc >> ((loopSrcX & 1) << 2)) & 0xF);
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toShift = ((loopDstX & 1) << 2);
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toOrr <<= toShift;
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toAnd = 0xF0 >> (toShift);
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*pixelsDst = toOrr | (*pixelsDst & toAnd);
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}
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}
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}
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else
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{
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for (loopSrcY = srcY, loopDstY = dstY; loopSrcY < yEnd; loopSrcY++, loopDstY++)
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{
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for (loopSrcX = srcX, loopDstX = dstX; loopSrcX < xEnd; loopSrcX++, loopDstX++)
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{
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pixelsSrc = src->pixels + ((loopSrcX >> 1) & 3) + ((loopSrcX >> 3) << 5) + (((loopSrcY >> 3) * multiplierSrcY) << 5) + ((u32)(loopSrcY << 0x1d) >> 0x1B);
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pixelsDst = dst->pixels + ((loopDstX >> 1) & 3) + ((loopDstX >> 3) << 5) + (((loopDstY >> 3) * multiplierDstY) << 5) + ((u32)(loopDstY << 0x1d) >> 0x1B);
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toOrr = ((*pixelsSrc >> ((loopSrcX & 1) << 2)) & 0xF);
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if (toOrr != colorKey)
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{
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toShift = ((loopDstX & 1) << 2);
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toOrr <<= toShift;
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toAnd = 0xF0 >> (toShift);
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*pixelsDst = toOrr | (*pixelsDst & toAnd);
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}
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}
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}
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}
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}
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void FillBitmapRect4Bit(struct Bitmap *surface, u16 x, u16 y, u16 width, u16 height, u8 fillValue)
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{
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s32 xEnd;
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s32 yEnd;
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s32 multiplierY;
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s32 loopX, loopY;
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s32 toOrr1, toOrr2;
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xEnd = x + width;
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if (xEnd > surface->width)
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xEnd = surface->width;
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yEnd = y + height;
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if (yEnd > surface->height)
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yEnd = surface->height;
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multiplierY = (surface->width + (surface->width & 7)) >> 3;
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toOrr1 = (u32)(fillValue << 0x1C) >> 0x18;
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toOrr2 = (fillValue & 0xF);
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for (loopY = y; loopY < yEnd; loopY++)
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{
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for (loopX = x; loopX < xEnd; loopX++)
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{
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u8 *pixels = surface->pixels + ((loopX >> 1) & 3) + ((loopX >> 3) << 5) + (((loopY >> 3) * multiplierY) << 5) + ((u32)(loopY << 0x1d) >> 0x1B);
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if ((loopX << 0x1F) != 0)
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*pixels = toOrr1 | (*pixels & 0xF);
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else
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*pixels = toOrr2 | (*pixels & 0xF0);
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}
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}
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}
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void BlitBitmapRect4BitTo8Bit(struct Bitmap *src, struct Bitmap *dst, u16 srcX, u16 srcY, u16 dstX, u16 dstY, u16 width, u16 height, u8 colorKey, u8 paletteOffset)
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{
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s32 palOffsetBits;
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s32 xEnd;
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s32 yEnd;
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s32 multiplierSrcY;
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s32 multiplierDstY;
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s32 loopSrcY, loopDstY;
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s32 loopSrcX, loopDstX;
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u8 *pixelsSrc;
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u8 *pixelsDst;
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s32 colorKeyBits;
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palOffsetBits = (u32)(paletteOffset << 0x1C) >> 0x18;
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colorKeyBits = (u32)(colorKey << 0x1C) >> 0x18;
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if (dst->width - dstX < width)
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xEnd = (dst->width - dstX) + srcX;
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else
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xEnd = width + srcX;
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if (dst->height - dstY < height)
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yEnd = (srcY + dst->height) - dstY;
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else
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yEnd = srcY + height;
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multiplierSrcY = (src->width + (src->width & 7)) >> 3;
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multiplierDstY = (dst->width + (dst->width & 7)) >> 3;
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if (colorKey == 0xFF)
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{
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for (loopSrcY = srcY, loopDstY = dstY; loopSrcY < yEnd; loopSrcY++, loopDstY++)
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{
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pixelsSrc = src->pixels + ((srcX >> 1) & 3) + ((srcX >> 3) << 5) + (((loopSrcY >> 3) * multiplierSrcY) << 5) + ((u32)(loopSrcY << 0x1d) >> 0x1b);
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for (loopSrcX = srcX, loopDstX = dstX; loopSrcX < xEnd; loopSrcX++, loopDstX++)
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{
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pixelsDst = dst->pixels + (loopDstX & 7) + ((loopDstX >> 3) << 6) + (((loopDstY >> 3) * multiplierDstY) << 6) + ((u32)(loopDstY << 0x1d) >> 0x1a);
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if (loopSrcX & 1)
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{
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*pixelsDst = palOffsetBits + (*pixelsSrc >> 4);
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}
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else
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{
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pixelsSrc = src->pixels + ((loopSrcX >> 1) & 3) + ((loopSrcX >> 3) << 5) + (((loopSrcY >> 3) * multiplierSrcY) << 5) + ((u32)(loopSrcY << 0x1d) >> 0x1b);
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*pixelsDst = palOffsetBits + (*pixelsSrc & 0xF);
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}
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}
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}
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}
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else
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{
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for (loopSrcY = srcY, loopDstY = dstY; loopSrcY < yEnd; loopSrcY++, loopDstY++)
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{
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pixelsSrc = src->pixels + ((srcX >> 1) & 3) + ((srcX >> 3) << 5) + (((loopSrcY >> 3) * multiplierSrcY) << 5) + ((u32)(loopSrcY << 0x1d) >> 0x1b);
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for (loopSrcX = srcX, loopDstX = dstX; loopSrcX < xEnd; loopSrcX++, loopDstX++)
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{
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if (loopSrcX & 1)
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{
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if ((*pixelsSrc & 0xF0) != colorKeyBits)
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{
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pixelsDst = dst->pixels + (loopDstX & 7) + ((loopDstX >> 3) << 6) + (((loopDstY >> 3) * multiplierDstY) << 6) + ((u32)(loopDstY << 0x1d) >> 0x1a);
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*pixelsDst = palOffsetBits + (*pixelsSrc >> 4);
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}
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}
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else
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{
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pixelsSrc = src->pixels + ((loopSrcX >> 1) & 3) + ((loopSrcX >> 3) << 5) + (((loopSrcY >> 3) * multiplierSrcY) << 5) + ((u32)(loopSrcY << 0x1d) >> 0x1b);
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if ((*pixelsSrc & 0xF) != colorKey)
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{
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pixelsDst = dst->pixels + (loopDstX & 7) + ((loopDstX >> 3) << 6) + (((loopDstY >> 3) * multiplierDstY) << 6) + ((u32)(loopDstY << 0x1d) >> 0x1a);
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*pixelsDst = palOffsetBits + (*pixelsSrc & 0xF);
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}
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}
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}
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}
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}
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}
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void FillBitmapRect8Bit(struct Bitmap *surface, u16 x, u16 y, u16 width, u16 height, u8 fillValue)
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{
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s32 xEnd;
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s32 yEnd;
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s32 multiplierY;
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s32 loopX, loopY;
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xEnd = x + width;
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if (xEnd > surface->width)
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xEnd = surface->width;
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yEnd = y + height;
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if (yEnd > surface->height)
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yEnd = surface->height;
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multiplierY = (surface->width + (surface->width & 7)) >> 3;
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for (loopY = y; loopY < yEnd; loopY++)
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{
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for (loopX = x; loopX < xEnd; loopX++)
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{
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u8 *pixels = surface->pixels + (loopX & 7) + ((loopX >> 3) << 6) + (((loopY >> 3) * multiplierY) << 6) + ((u32)(loopY << 0x1d) >> 0x1a);
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*pixels = fillValue;
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}
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}
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}
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