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Merge pull request #482 from dayllenger/work 

Linear gradients - done software rasterization
This commit is contained in:
Vadim Lopatin 2017-10-12 13:16:47 +03:00 committed by GitHub
parent cc85663ac3 b5eb939a46
commit a5bbe95521
1 changed files with 36 additions and 4 deletions
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40
src/dlangui/graphics/drawbuf.d
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@ -1163,9 +1163,23 @@ class ColorDrawBufBase : DrawBuf {
} }
} }
/// fill rectangle with a gradient (clipping is applied)
override void fillGradientRect(Rect rc, uint color1, uint color2, uint color3, uint color4) { override void fillGradientRect(Rect rc, uint color1, uint color2, uint color3, uint color4) {
// TODO if (applyClipping(rc)) {
fillRect(rc, color1); foreach (y; rc.top .. rc.bottom) {
// interpolate vertically at the side edges
uint ay = (255 * (y - rc.top)) / (rc.bottom - rc.top);
uint cl = blendARGB(color2, color1, ay);
uint cr = blendARGB(color4, color3, ay);
uint * row = scanLine(y);
foreach (x; rc.left .. rc.right) {
// interpolate horizontally
uint ax = (255 * (x - rc.left)) / (rc.right - rc.left);
row[x] = blendARGB(cr, cl, ax);
}
}
}
} }
/// fill rectangle with solid color and pattern (clipping is applied) 0=solid fill, 1 = dotted /// fill rectangle with solid color and pattern (clipping is applied) 0=solid fill, 1 = dotted
@ -1413,9 +1427,27 @@ class GrayDrawBuf : DrawBuf {
} }
} }
/// fill rectangle with a gradient (clipping is applied)
override void fillGradientRect(Rect rc, uint color1, uint color2, uint color3, uint color4) { override void fillGradientRect(Rect rc, uint color1, uint color2, uint color3, uint color4) {
// TODO if (applyClipping(rc)) {
fillRect(rc, color1); ubyte c1 = rgbToGray(color1);
ubyte c2 = rgbToGray(color2);
ubyte c3 = rgbToGray(color3);
ubyte c4 = rgbToGray(color4);
foreach (y; rc.top .. rc.bottom) {
// interpolate vertically at the side edges
uint ay = (255 * (y - rc.top)) / (rc.bottom - rc.top);
ubyte cl = blendGray(c2, c1, ay);
ubyte cr = blendGray(c4, c3, ay);
ubyte * row = scanLine(y);
foreach (x; rc.left .. rc.right) {
// interpolate horizontally
uint ax = (255 * (x - rc.left)) / (rc.right - rc.left);
row[x] = blendGray(cr, cl, ax);
}
}
}
} }
/// draw pixel at (x, y) with specified color /// draw pixel at (x, y) with specified color