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libgimpcolor: fix gimp_color_profile_get_lcms_format() for premul formats 

It doesn't look like LCMS supports premultiplied alpha formats, so
we must convert them to the corresponding non-premultiplied formats
ourselves.
This commit is contained in:
Ell 2018-03-16 12:31:55 -04:00
parent 6c8300923d
commit 9c663a6574
1 changed files with 71 additions and 153 deletions
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224
libgimpcolor/gimpcolorprofile.c
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@ -1545,9 +1545,7 @@ gimp_color_profile_get_lcms_format (const Babl *format,
}
else if (format == babl_format ("cairo-ARGB32"))
{
*lcms_format = TYPE_RGBA_8;
return babl_format ("R'G'B'A u8");
rgb = TRUE;
}
else if (model == babl_model ("RGB") ||
model == babl_model ("RGBA") ||
@ -1629,121 +1627,76 @@ gimp_color_profile_get_lcms_format (const Babl *format,
*lcms_format = 0;
#define FIND_FORMAT_FOR_TYPE(babl_t, lcms_t) \
do \
{ \
if (has_alpha) \
{ \
if (rgb) \
{ \
*lcms_format = TYPE_RGBA_##lcms_t; \
\
if (linear) \
output_format = babl_format ("RGBA " babl_t); \
else \
output_format = babl_format ("R'G'B'A " babl_t); \
} \
else if (gray) \
{ \
*lcms_format = TYPE_GRAYA_##lcms_t; \
\
if (linear) \
output_format = babl_format ("YA " babl_t); \
else \
output_format = babl_format ("Y'A " babl_t); \
} \
else if (cmyk) \
{ \
*lcms_format = TYPE_CMYKA_##lcms_t; \
\
output_format = format; \
} \
} \
else \
{ \
if (rgb) \
{ \
*lcms_format = TYPE_RGB_##lcms_t; \
\
if (linear) \
output_format = babl_format ("RGB " babl_t); \
else \
output_format = babl_format ("R'G'B' " babl_t); \
} \
else if (gray) \
{ \
*lcms_format = TYPE_GRAY_##lcms_t; \
\
if (linear) \
output_format = babl_format ("Y " babl_t); \
else \
output_format = babl_format ("Y' " babl_t); \
} \
else if (cmyk) \
{ \
*lcms_format = TYPE_CMYK_##lcms_t; \
\
output_format = format; \
} \
} \
} \
while (FALSE)
if (type == babl_type ("u8"))
{
if (has_alpha)
{
if (rgb)
*lcms_format = TYPE_RGBA_8;
else if (gray)
*lcms_format = TYPE_GRAYA_8;
else if (cmyk)
*lcms_format = TYPE_CMYKA_8;
}
else
{
if (rgb)
*lcms_format = TYPE_RGB_8;
else if (gray)
*lcms_format = TYPE_GRAY_8;
else if (cmyk)
*lcms_format = TYPE_CMYK_8;
}
output_format = format;
}
FIND_FORMAT_FOR_TYPE ("u8", 8);
else if (type == babl_type ("u16"))
{
if (has_alpha)
{
if (rgb)
*lcms_format = TYPE_RGBA_16;
else if (gray)
*lcms_format = TYPE_GRAYA_16;
else if (cmyk)
*lcms_format = TYPE_CMYKA_16;
}
else
{
if (rgb)
*lcms_format = TYPE_RGB_16;
else if (gray)
*lcms_format = TYPE_GRAY_16;
else if (cmyk)
*lcms_format = TYPE_CMYK_16;
}
output_format = format;
}
FIND_FORMAT_FOR_TYPE ("u16", 16);
else if (type == babl_type ("half")) /* 16-bit floating point (half) */
{
if (has_alpha)
{
if (rgb)
*lcms_format = TYPE_RGBA_HALF_FLT;
else if (gray)
*lcms_format = TYPE_GRAYA_HALF_FLT;
else if (cmyk)
*lcms_format = TYPE_CMYKA_HALF_FLT;
}
else
{
if (rgb)
*lcms_format = TYPE_RGB_HALF_FLT;
else if (gray)
*lcms_format = TYPE_GRAY_HALF_FLT;
else if (cmyk)
*lcms_format = TYPE_CMYK_HALF_FLT;
}
output_format = format;
}
FIND_FORMAT_FOR_TYPE ("half", HALF_FLT);
else if (type == babl_type ("float"))
{
if (has_alpha)
{
if (rgb)
*lcms_format = TYPE_RGBA_FLT;
else if (gray)
*lcms_format = TYPE_GRAYA_FLT;
else if (cmyk)
*lcms_format = TYPE_CMYKA_FLT;
}
else
{
if (rgb)
*lcms_format = TYPE_RGB_FLT;
else if (gray)
*lcms_format = TYPE_GRAY_FLT;
else if (cmyk)
*lcms_format = TYPE_CMYK_FLT;
}
output_format = format;
}
FIND_FORMAT_FOR_TYPE ("float", FLT);
else if (type == babl_type ("double"))
{
if (has_alpha)
{
if (rgb)
*lcms_format = TYPE_RGBA_DBL;
else if (gray)
*lcms_format = TYPE_GRAYA_DBL;
else if (cmyk)
*lcms_format = TYPE_CMYKA_DBL;
}
else
{
if (rgb)
*lcms_format = TYPE_RGB_DBL;
else if (gray)
*lcms_format = TYPE_GRAY_DBL;
else if (cmyk)
*lcms_format = TYPE_CMYK_DBL;
}
output_format = format;
}
FIND_FORMAT_FOR_TYPE ("double", DBL);
if (*lcms_format == 0)
{
@ -1751,49 +1704,14 @@ gimp_color_profile_get_lcms_format (const Babl *format,
"falling back to float\n",
G_STRFUNC, babl_get_name (format));
if (has_alpha)
{
if (gray)
{
*lcms_format = TYPE_GRAYA_FLT;
rgb = ! gray;
if (linear)
output_format = babl_format ("YA float");
else
output_format = babl_format ("Y'A float");
}
else
{
*lcms_format = TYPE_RGBA_FLT;
FIND_FORMAT_FOR_TYPE ("float", FLT);
if (linear)
output_format = babl_format ("RGBA float");
else
output_format = babl_format ("R'G'B'A float");
}
}
else
{
if (gray)
{
*lcms_format = TYPE_GRAY_FLT;
if (linear)
output_format = babl_format ("Y float");
else
output_format = babl_format ("Y' float");
}
else
{
*lcms_format = TYPE_RGB_FLT;
if (linear)
output_format = babl_format ("RGB float");
else
output_format = babl_format ("R'G'B' float");
}
}
g_return_val_if_fail (output_format != NULL, NULL);
}
#undef FIND_FORMAT_FOR_TYPE
return output_format;
}