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colorstate: Add a color conversion function

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Add a function for converting a single color from one
color state to another. This is a generalization of the
already existing function to convert a GdkRGBA to another
color state.
This commit is contained in:
Matthias Clasen
2024-07-31 18:32:58 -04:00
parent 12e0ec0b48
commit ffc89e40a0
1 changed files with 47 additions and 21 deletions
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68
gdk/gdkcolorstateprivate.h
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@@ -74,6 +74,9 @@ extern GdkDefaultColorState gdk_default_color_states[GDK_COLOR_STATE_N_IDS];
const char * gdk_color_state_get_name (GdkColorState *color_state);
GdkColorState * gdk_color_state_get_no_srgb_tf (GdkColorState *self);
GdkColorState * gdk_color_state_new_for_cicp (const GdkCicp *cicp,
GError **error);
static inline GdkColorState *
gdk_color_state_get_rendering_color_state (GdkColorState *self)
{
@@ -158,30 +161,53 @@ gdk_color_state_get_convert_from (GdkColorState *self,
return self->klass->get_convert_from (self, source);
}
static inline void
gdk_color_state_from_rgba (GdkColorState *self,
const GdkRGBA *rgba,
float out_color[4])
{
GdkFloatColorConvert convert;
out_color[0] = rgba->red;
out_color[1] = rgba->green;
out_color[2] = rgba->blue;
out_color[3] = rgba->alpha;
if (gdk_color_state_equal (GDK_COLOR_STATE_SRGB, self))
return;
convert = gdk_color_state_get_convert_to (GDK_COLOR_STATE_SRGB, self);
convert (GDK_COLOR_STATE_SRGB, (float(*)[4]) out_color, 1);
}
static inline const GdkCicp *
gdk_color_state_get_cicp (GdkColorState *self)
{
return self->klass->get_cicp (self);
}
GdkColorState * gdk_color_state_new_for_cicp (const GdkCicp *cicp,
GError **error);
static inline void
gdk_color_state_convert_color (GdkColorState *src_cs,
const float src[4],
GdkColorState *dest_cs,
float dest[4])
{
GdkFloatColorConvert convert = NULL;
GdkFloatColorConvert convert2 = NULL;
memcpy (dest, src, sizeof (float) * 4);
if (gdk_color_state_equal (src_cs, dest_cs))
return;
convert = gdk_color_state_get_convert_to (src_cs, dest_cs);
if (!convert)
convert2 = gdk_color_state_get_convert_from (dest_cs, src_cs);
if (!convert && !convert2)
{
GdkColorState *connection = GDK_COLOR_STATE_REC2100_LINEAR;
convert = gdk_color_state_get_convert_to (src_cs, connection);
convert2 = gdk_color_state_get_convert_from (dest_cs, connection);
}
if (convert)
convert (src_cs, (float(*)[4]) dest, 1);
if (convert2)
convert2 (dest_cs, (float(*)[4]) dest, 1);
}
static inline void
gdk_color_state_from_rgba (GdkColorState *self,
const GdkRGBA *rgba,
float out_color[4])
{
gdk_color_state_convert_color (GDK_COLOR_STATE_SRGB,
(const float *) rgba,
self,
out_color);
}