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Render the gradient with the dithering matrix directly

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In this way we don't need a dithering algorithm anymore, because instead
of converting the RGB gradient to indexed using the dithering algorithm,
we render the gradient directly using the dithering matrix + the
gradient factor to choose one of the gradient colors.
This commit is contained in:
David Capello 2017-06-09 17:00:40 -03:00
parent 26bc2c70db
commit 0bab4e7ae7
1 changed files with 36 additions and 33 deletions
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69
src/app/tools/ink_processing.h
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@ -905,6 +905,9 @@ public:
return;
}
const render::DitheringMatrix& m_matrix =
loop->getDitheringMatrix();
base::Vector2d<double>
u(strokes[0].firstPoint().x,
strokes[0].firstPoint().y),
@ -939,23 +942,36 @@ public:
auto it = bits.begin();
const int width = m_tmpImage->width();
const int height = m_tmpImage->height();
for (int y=0; y<height; ++y) {
for (int x=0; x<width; ++x, ++it) {
base::Vector2d<double> q(x, y);
q -= u;
double f = (q * w.normalize()) / (w.magnitude());
doc::color_t c;
if (f < 0.0) c = c0;
else if (f > 1.0) c = c1;
else {
c = doc::rgba(int(255.0 * (r0 + f*(r1-r0))),
int(255.0 * (g0 + f*(g1-g0))),
int(255.0 * (b0 + f*(b1-b0))),
int(255.0 * (a0 + f*(a1-a0))));
if (m_matrix.rows() == 1 && m_matrix.cols() == 1) {
for (int y=0; y<height; ++y) {
for (int x=0; x<width; ++x, ++it) {
base::Vector2d<double> q(x, y);
q -= u;
double f = (q * w.normalize()) / (w.magnitude());
doc::color_t c;
if (f < 0.0) c = c0;
else if (f > 1.0) c = c1;
else {
c = doc::rgba(int(255.0 * (r0 + f*(r1-r0))),
int(255.0 * (g0 + f*(g1-g0))),
int(255.0 * (b0 + f*(b1-b0))),
int(255.0 * (a0 + f*(a1-a0))));
}
*it = c;
}
}
}
else {
for (int y=0; y<height; ++y) {
for (int x=0; x<width; ++x, ++it) {
base::Vector2d<double> q(x, y);
q -= u;
double f = (q * w.normalize()) / (w.magnitude());
*it = (f*m_matrix.maxValue() < m_matrix(y, x) ? c0: c1);
}
*it = c;
}
}
}
@ -978,7 +994,7 @@ public:
, m_rgbmap(loop->getRgbMap())
, m_maskIndex(loop->getLayer()->isBackground() ? -1: loop->sprite()->transparentColor())
, m_matrix(loop->getDitheringMatrix())
, m_dither(loop->getDitheringAlgorithm()) {
{
}
void hline(int x1, int y, int x2, ToolLoop* loop) override {
@ -1000,7 +1016,6 @@ private:
const RgbMap* m_rgbmap;
const int m_maskIndex;
const render::DitheringMatrix m_matrix;
render::DitheringAlgorithmBase* m_dither;
};
template<>
@ -1033,12 +1048,6 @@ void GradientInkProcessing<RgbTraits>::processPixel(int x, int y)
doc::rgba(r, g, b, a),
m_opacity);
if (m_dither) {
int i = m_dither->ditherRgbPixelToIndex(
m_matrix, c, x, y, m_rgbmap, m_palette);
c = m_palette->getEntry(i);
}
*m_dstAddress = c;
++m_tmpAddress;
}
@ -1113,16 +1122,10 @@ void GradientInkProcessing<IndexedTraits>::processPixel(int x, int y)
c0 = m_palette->getEntry(c0);
c = rgba_blender_normal(c0, c, m_opacity);
if (m_dither) {
*m_dstAddress = m_dither->ditherRgbPixelToIndex(
m_matrix, c, x, y, m_rgbmap, m_palette);
}
else {
*m_dstAddress = m_rgbmap->mapColor(rgba_getr(c),
rgba_getg(c),
rgba_getb(c),
rgba_geta(c));
}
*m_dstAddress = m_rgbmap->mapColor(rgba_getr(c),
rgba_getg(c),
rgba_getb(c),
rgba_geta(c));
++m_tmpAddress;
}