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Improved converters

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This commit is contained in:
Andrew Murray 2019-03-28 20:59:39 +11:00
parent dba38912fb
commit 54272c902f
1 changed files with 41 additions and 3 deletions
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44
src/libImaging/Convert.c
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@ -517,6 +517,18 @@ l2cmyk(UINT8* out, const UINT8* in, int xsize)
}
}
static void
la2cmyk(UINT8* out, const UINT8* in, int xsize)
{
int x;
for (x = 0; x < xsize; x++, in += 4) {
*out++ = 0;
*out++ = 0;
*out++ = 0;
*out++ = ~(in[0]);
}
}
static void
rgb2cmyk(UINT8* out, const UINT8* in, int xsize)
{
@ -673,6 +685,18 @@ l2ycbcr(UINT8* out, const UINT8* in, int xsize)
}
}
static void
la2ycbcr(UINT8* out, const UINT8* in, int xsize)
{
int x;
for (x = 0; x < xsize; x++, in += 4) {
*out++ = in[0];
*out++ = 128;
*out++ = 128;
*out++ = 255;
}
}
static void
ycbcr2l(UINT8* out, const UINT8* in, int xsize)
{
@ -681,6 +705,16 @@ ycbcr2l(UINT8* out, const UINT8* in, int xsize)
*out++ = in[0];
}
static void
ycbcr2la(UINT8* out, const UINT8* in, int xsize)
{
int x;
for (x = 0; x < xsize; x++, in += 4, out += 4) {
out[0] = out[1] = out[2] = in[0];
out[3] = 255;
}
}
/* ------------------------- */
/* I;16 (16-bit) conversions */
/* ------------------------- */
@ -818,8 +852,10 @@ static struct {
{ "LA", "L", la2l },
{ "LA", "La", lA2la },
{ "LA", "RGB", la2rgb },
{ "LA", "RGBX", la2rgb },
{ "LA", "RGBA", la2rgb },
{ "LA", "RGBX", la2rgb },
{ "LA", "CMYK", la2cmyk },
{ "LA", "YCbCr", la2ycbcr },
{ "La", "LA", la2lA },
@ -861,8 +897,9 @@ static struct {
{ "RGBX", "1", rgb2bit },
{ "RGBX", "L", rgb2l },
{ "RGBA", "I", rgb2i },
{ "RGBA", "F", rgb2f },
{ "RGBX", "LA", rgb2la },
{ "RGBX", "I", rgb2i },
{ "RGBX", "F", rgb2f },
{ "RGBX", "RGB", rgba2rgb },
{ "RGBX", "CMYK", rgb2cmyk },
{ "RGBX", "YCbCr", ImagingConvertRGB2YCbCr },
@ -872,6 +909,7 @@ static struct {
{ "CMYK", "RGBX", cmyk2rgb },
{ "YCbCr", "L", ycbcr2l },
{ "YCbCr", "LA", ycbcr2la },
{ "YCbCr", "RGB", ImagingConvertYCbCr2RGB },
{ "HSV", "RGB", hsv2rgb },