mirror of https://github.com/OpenRCT2/OpenRCT2.git
116 lines
4.0 KiB
C++
116 lines
4.0 KiB
C++
/*****************************************************************************
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* Copyright (c) 2014-2020 OpenRCT2 developers
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*
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* For a complete list of all authors, please refer to contributors.md
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* Interested in contributing? Visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is licensed under the GNU General Public License version 3.
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*****************************************************************************/
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#include "Drawing.h"
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template<DrawBlendOp TBlendOp> static void FASTCALL DrawBMPSpriteMagnify(rct_drawpixelinfo& dpi, const DrawSpriteArgs& args)
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{
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auto& g1 = args.SourceImage;
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auto src = g1.offset + ((static_cast<size_t>(g1.width) * args.SrcY) + args.SrcX);
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auto dst = args.DestinationBits;
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auto& paletteMap = args.PalMap;
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auto zoomLevel = dpi.zoom_level;
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size_t srcLineWidth = g1.width;
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size_t dstLineWidth = (static_cast<size_t>(dpi.width) / zoomLevel) + dpi.pitch;
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uint8_t zoom = 1 / zoomLevel;
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auto width = args.Width / zoomLevel;
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auto height = args.Height / zoomLevel;
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for (; height > 0; height -= zoom)
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{
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auto nextSrc = src + srcLineWidth;
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auto nextDst = dst + (dstLineWidth * zoom);
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for (int32_t widthRemaining = width; widthRemaining > 0; widthRemaining -= zoom, src++, dst += zoom)
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{
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// Copy src to a block of zoom * zoom on dst
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BlitPixels<TBlendOp>(src, dst, paletteMap, zoom, dstLineWidth);
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}
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src = nextSrc;
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dst = nextDst;
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}
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}
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template<DrawBlendOp TBlendOp> static void FASTCALL DrawBMPSpriteMinify(rct_drawpixelinfo& dpi, const DrawSpriteArgs& args)
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{
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auto& g1 = args.SourceImage;
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auto src = g1.offset + ((static_cast<size_t>(g1.width) * args.SrcY) + args.SrcX);
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auto dst = args.DestinationBits;
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auto& paletteMap = args.PalMap;
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auto width = args.Width;
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auto height = args.Height;
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auto zoomLevel = dpi.zoom_level;
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size_t srcLineWidth = g1.width * zoomLevel;
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size_t dstLineWidth = (static_cast<size_t>(dpi.width) / zoomLevel) + dpi.pitch;
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uint8_t zoom = 1 * zoomLevel;
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for (; height > 0; height -= zoom)
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{
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auto nextSrc = src + srcLineWidth;
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auto nextDst = dst + dstLineWidth;
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for (int32_t widthRemaining = width; widthRemaining > 0; widthRemaining -= zoom, src += zoom, dst++)
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{
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BlitPixel<TBlendOp>(src, dst, paletteMap);
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}
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src = nextSrc;
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dst = nextDst;
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}
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}
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template<DrawBlendOp TBlendOp> static void FASTCALL DrawBMPSprite(rct_drawpixelinfo& dpi, const DrawSpriteArgs& args)
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{
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if (dpi.zoom_level < 0)
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{
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DrawBMPSpriteMagnify<TBlendOp>(dpi, args);
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}
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else
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{
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DrawBMPSpriteMinify<TBlendOp>(dpi, args);
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}
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}
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/**
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* Copies a sprite onto the buffer. There is no compression used on the sprite
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* image.
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* rct2: 0x0067A690
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* @param imageId Only flags are used.
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*/
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void FASTCALL gfx_bmp_sprite_to_buffer(rct_drawpixelinfo& dpi, const DrawSpriteArgs& args)
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{
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auto imageId = args.Image;
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// Image uses the palette pointer to remap the colours of the image
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if (imageId.HasPrimary())
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{
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if (imageId.IsBlended())
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{
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// Copy non-transparent bitmap data but blend src and dst pixel using the palette map.
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DrawBMPSprite<BLEND_TRANSPARENT | BLEND_SRC | BLEND_DST>(dpi, args);
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}
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else
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{
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// Copy non-transparent bitmap data but re-colour using the palette map.
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DrawBMPSprite<BLEND_TRANSPARENT | BLEND_SRC>(dpi, args);
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}
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}
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else if (imageId.IsBlended())
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{
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// Image is only a transparency mask. Just colour the pixels using the palette map.
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// Used for glass.
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DrawBMPSprite<BLEND_TRANSPARENT | BLEND_DST>(dpi, args);
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}
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else if (!(args.SourceImage.flags & G1_FLAG_BMP))
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{
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// Copy raw bitmap data to target
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DrawBMPSprite<BLEND_NONE>(dpi, args);
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}
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else
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{
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// Copy raw bitmap data to target but exclude transparent pixels
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DrawBMPSprite<BLEND_TRANSPARENT>(dpi, args);
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}
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}
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