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Enginify trans_rect

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Moves `trans_rect` to `engine` as `DrawHalfTransparentRectTo` and makes
it operate on `CelOutputBuf`.
This commit is contained in:
Gleb Mazovetskiy 2021-03-01 11:35:03 +00:00 • committed by Anders Jenbo
commit 83ce7c27af
15 changed files with 102 additions and 78 deletions
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37
Source/engine.cpp
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@ -555,6 +555,43 @@ void DrawLineTo(CelOutputBuffer out, int x0, int y0, int x1, int y1, BYTE color_
}
}
static void DrawHalfTransparentBlendedRectTo(CelOutputBuffer out, int sx, int sy, int width, int height)
{
BYTE *pix = out.at(sx, sy);
for (int row = 0; row < height; row++) {
for (int col = 0; col < width; col++) {
*pix = paletteTransparencyLookup[0][*pix];
pix++;
}
pix += out.line_width - width;
}
}
static void DrawHalfTransparentStippledRectTo(CelOutputBuffer out, int sx, int sy, int width, int height)
{
BYTE *pix = out.at(sx, sy);
for (int row = 0; row < height; row++) {
for (int col = 0; col < width; col++) {
if ((row & 1 && col & 1) || (!(row & 1) && !(col & 1)))
*pix = 0;
pix++;
}
pix += out.line_width - width;
}
}
void DrawHalfTransparentRectTo(CelOutputBuffer out, int sx, int sy, int width, int height)
{
int row, col;
BYTE *pix = out.at(sx, sy);
if (sgOptions.bBlendedTransparancy) {
DrawHalfTransparentBlendedRectTo(out, sx, sy, width, height);
} else {
DrawHalfTransparentStippledRectTo(out, sx, sy, width, height);
}
}
int GetDirection(int x1, int y1, int x2, int y2)
{
int mx, my;