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Branchless code for interlacing a texture

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This commit is contained in:
Mathias Gumz 2013-02-06 07:49:54 +01:00
parent 779618e45d
commit 6514398bea
1 changed files with 15 additions and 25 deletions
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40
src/FbTk/TextureRender.cc
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@ -85,12 +85,14 @@ struct RGBA {
color.b = PRE_MULTIPLY_0_75[color.b];
}
static void noop(RGBA& color) { }
typedef void (*colorFunc)(RGBA&);
static const colorFunc pseudoInterlaceFuncs[2];
static const colorFunc pseudoInterlaceFuncs[3];
};
const RGBA::colorFunc RGBA::pseudoInterlaceFuncs[2] = {
const RGBA::colorFunc RGBA::pseudoInterlaceFuncs[3] = {
RGBA::noop,
RGBA::brighten_4,
RGBA::darken
};
@ -233,12 +235,11 @@ void prepareMirrorTable(prepareFunc prepare, size_t size, FbTk::RGBA* rgba,
size_t half_size = (size >> 1) + (size & 1);
prepare(half_size, &rgba[0], from, to, scale);
mirrorRGB(size, 1, rgba); // TODO!!
mirrorRGB(size, 1, rgba);
}
inline void pseudoInterlace(FbTk::RGBA& rgba, const size_t& y) {
FbTk::RGBA::pseudoInterlaceFuncs[y & 1](rgba);
inline void pseudoInterlace(FbTk::RGBA& rgba, const bool& do_interlace, const size_t& y) {
FbTk::RGBA::pseudoInterlaceFuncs[do_interlace + (do_interlace * (y & 1))](rgba);
}
@ -367,11 +368,8 @@ void renderHorizontalGradient(bool interlaced,
for (i = 0, y = 0; y < height; ++y) {
for (x = 0; x < width; ++x, ++i) {
rgba[i] = gradient[x];
if (interlaced)
pseudoInterlace(rgba[i], y);
pseudoInterlace(rgba[i], interlaced, y);
}
}
}
@ -392,9 +390,7 @@ void renderVerticalGradient(bool interlaced,
for (i = 0, y = 0; y < height; ++y) {
for (x = 0; x < width; ++x, ++i) {
rgba[i] = gradient[y];
if (interlaced)
pseudoInterlace(rgba[i], y);
pseudoInterlace(rgba[i], interlaced, y);
}
}
}
@ -427,8 +423,7 @@ void renderPyramidGradient(bool interlaced,
rgba[i].g = x_gradient[x].g + y_gradient[y].g;
rgba[i].b = x_gradient[x].b + y_gradient[y].b;
if (interlaced)
pseudoInterlace(rgba[i], y);
pseudoInterlace(rgba[i], interlaced, y);
}
}
}
@ -482,8 +477,7 @@ void renderRectangleGradient(bool interlaced,
rgba[i] = y_gradient[y];
}
if (interlaced)
pseudoInterlace(rgba[i], y);
pseudoInterlace(rgba[i], interlaced, y);
}
}
}
@ -525,8 +519,7 @@ void renderPipeCrossGradient(bool interlaced,
rgba[i] = y_gradient[y];
}
if (interlaced)
pseudoInterlace(rgba[i], y);
pseudoInterlace(rgba[i], interlaced, y);
}
}
}
@ -562,8 +555,7 @@ void renderDiagonalGradient(bool interlaced,
rgba[i].g = x_gradient[x].g + y_gradient[y].g;
rgba[i].b = x_gradient[x].b + y_gradient[y].b;
if (interlaced)
pseudoInterlace(rgba[i], y);
pseudoInterlace(rgba[i], interlaced, y);
}
}
}
@ -608,8 +600,7 @@ void renderEllipticGradient(bool interlaced,
rgba[i].g = (unsigned char)(g - (d * dg));
rgba[i].b = (unsigned char)(b - (d * db));
if (interlaced)
pseudoInterlace(rgba[i], y);
pseudoInterlace(rgba[i], interlaced, y);
}
}
}
@ -643,8 +634,7 @@ void renderCrossDiagonalGradient(bool interlaced,
rgba[i].g = x_gradient[x].g + y_gradient[y].g;
rgba[i].b = x_gradient[x].b + y_gradient[y].b;
if (interlaced)
pseudoInterlace(rgba[i], y);
pseudoInterlace(rgba[i], interlaced, y);
}
}
}