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Implement magnify for bitmap

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This commit is contained in:
Ted John
2020-06-02 20:34:28 +01:00
parent cd7324262d
commit 247c950c60
1 changed files with 97 additions and 51 deletions
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148
src/openrct2/drawing/Drawing.Sprite.BMP.cpp
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@@ -9,9 +9,103 @@
#include "Drawing.h"
template<DrawBlendOp TBlendOp> static bool FASTCALL BlitPixel(const uint8_t* src, uint8_t* dst, const PaletteMap& paletteMap)
{
if constexpr (TBlendOp & BLEND_TRANSPARENT)
{
// Ignore transparent pixels
if (*src == 0)
{
return false;
}
}
if constexpr (((TBlendOp & BLEND_SRC) != 0) && ((TBlendOp & BLEND_DST) != 0))
{
auto pixel = paletteMap.Blend(*src, *dst);
if constexpr (TBlendOp & BLEND_TRANSPARENT)
{
if (pixel == 0)
{
return false;
}
}
*dst = pixel;
return true;
}
else if constexpr ((TBlendOp & BLEND_SRC) != 0)
{
auto pixel = paletteMap[*src];
if constexpr (TBlendOp & BLEND_TRANSPARENT)
{
if (pixel == 0)
{
return false;
}
}
*dst = pixel;
return true;
}
else if constexpr ((TBlendOp & BLEND_DST) != 0)
{
auto pixel = paletteMap[*dst];
if constexpr (TBlendOp & BLEND_TRANSPARENT)
{
if (pixel == 0)
{
return false;
}
}
*dst = pixel;
return true;
}
else
{
*dst = *src;
return true;
}
}
template<DrawBlendOp TBlendOp>
static void FASTCALL BlitPixels(const uint8_t* src, uint8_t* dst, const PaletteMap& paletteMap, uint8_t zoom, size_t dstPitch)
{
auto yDstSkip = dstPitch - zoom;
for (uint8_t yy = 0; yy < zoom; yy++)
{
for (uint8_t xx = 0; xx < zoom; xx++)
{
BlitPixel<TBlendOp>(src, dst, paletteMap);
dst++;
}
dst += yDstSkip;
}
}
template<DrawBlendOp TBlendOp> static void FASTCALL DrawBMPSpriteMagnify(DrawSpriteArgs& args)
{
// TODO
auto& g1 = args.SourceImage;
auto src = g1.offset + ((static_cast<size_t>(g1.width) * args.SrcY) + args.SrcX);
auto dst = args.DestinationBits;
auto& paletteMap = args.PalMap;
auto dpi = args.DPI;
auto zoomLevel = dpi->zoom_level;
size_t srcLineWidth = g1.width;
size_t dstLineWidth = (static_cast<size_t>(dpi->width) / zoomLevel) + dpi->pitch;
uint8_t zoom = 1 / zoomLevel;
auto width = args.Width / zoomLevel;
auto height = args.Height / zoomLevel;
for (; height > 0; height -= zoom)
{
auto nextSrc = src + srcLineWidth;
auto nextDst = dst + (dstLineWidth * zoom);
for (int32_t widthRemaining = width; widthRemaining > 0; widthRemaining -= zoom, src++, dst += zoom)
{
// Copy src to a block of zoom * zoom on dst
BlitPixels<TBlendOp>(src, dst, paletteMap, zoom, dstLineWidth);
}
src = nextSrc;
dst = nextDst;
}
}
template<DrawBlendOp TBlendOp> static void FASTCALL DrawBMPSpriteMinify(DrawSpriteArgs& args)
@@ -19,7 +113,7 @@ template<DrawBlendOp TBlendOp> static void FASTCALL DrawBMPSpriteMinify(DrawSpri
auto& g1 = args.SourceImage;
auto src = g1.offset + ((static_cast<size_t>(g1.width) * args.SrcY) + args.SrcX);
auto dst = args.DestinationBits;
[[maybe_unused]] auto& paletteMap = args.PalMap;
auto& paletteMap = args.PalMap;
auto width = args.Width;
auto height = args.Height;
auto dpi = args.DPI;
@@ -33,55 +127,7 @@ template<DrawBlendOp TBlendOp> static void FASTCALL DrawBMPSpriteMinify(DrawSpri
auto nextDst = dst + dstLineWidth;
for (int32_t widthRemaining = width; widthRemaining > 0; widthRemaining -= zoom, src += zoom, dst++)
{
if constexpr (TBlendOp & BLEND_TRANSPARENT)
{
// Ignore transparent pixels
if (*src == 0)
{
continue;
}
}
if constexpr (((TBlendOp & BLEND_SRC) != 0) && ((TBlendOp & BLEND_DST) != 0))
{
auto pixel = paletteMap.Blend(*src, *dst);
if constexpr (TBlendOp & BLEND_TRANSPARENT)
{
if (pixel == 0)
{
continue;
}
}
*dst = pixel;
}
else if constexpr ((TBlendOp & BLEND_SRC) != 0)
{
auto pixel = paletteMap[*src];
if constexpr (TBlendOp & BLEND_TRANSPARENT)
{
if (pixel == 0)
{
continue;
}
}
*dst = pixel;
}
else if constexpr ((TBlendOp & BLEND_DST) != 0)
{
auto pixel = paletteMap[*dst];
if constexpr (TBlendOp & BLEND_TRANSPARENT)
{
if (pixel == 0)
{
continue;
}
}
*dst = pixel;
}
else
{
*dst = *src;
}
BlitPixel<TBlendOp>(src, dst, paletteMap);
}
src = nextSrc;
dst = nextDst;