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Round when converting to 8 bits (#3429)

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This commit is contained in:
Flössie
2016-09-21 21:54:46 +02:00
parent 309b823f93
commit 1e7b8035c4
5 changed files with 21 additions and 21 deletions
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12
rtengine/image16.cc
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@@ -28,9 +28,9 @@ namespace
void getScanline8 (const uint16_t *red, const uint16_t *green, const uint16_t *blue, int width, unsigned char* buffer)
{
for (int i = 0, ix = 0; i < width; i++) {
buffer[ix++] = red[i] / 257;
buffer[ix++] = green[i] / 257;
buffer[ix++] = blue[i] / 257;
buffer[ix++] = (red[i] + 128) / 257;
buffer[ix++] = (green[i] + 128) / 257;
buffer[ix++] = (blue[i] + 128) / 257;
}
}
@@ -300,9 +300,9 @@ Image16::to8()
for (int h = 0; h < height; ++h) {
for (int w = 0; w < width; ++w) {
img8->r(h, w) = r(h, w) / 257;
img8->g(h, w) = g(h, w) / 257;
img8->b(h, w) = b(h, w) / 257;
img8->r(h, w) = (r(h, w) + 128) / 257;
img8->g(h, w) = (g(h, w) + 128) / 257;
img8->b(h, w) = (b(h, w) + 128) / 257;
}
}