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89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
#pragma once
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#include "gdkcicpparams.h"
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G_BEGIN_DECLS
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typedef struct _GdkCicp GdkCicp;
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struct _GdkCicp
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{
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guint color_primaries;
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guint transfer_function;
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guint matrix_coefficients;
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GdkCicpRange range;
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};
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/*< private >
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* gdk_cicp_equal:
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* @p1: a `GdkCicp`
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* @p2: another `GdkCicp`
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*
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* Compare two cicp tuples for equality.
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*
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* Note that several cicp values are 'functionally equivalent'.
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* If you are interested in that notion, use gdk_cicp_equivalent().
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*
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* Returns: whether @p1 and @p2 are equal
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*/
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static inline gboolean
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gdk_cicp_equal (const GdkCicp *p1,
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const GdkCicp *p2)
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{
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return p1->color_primaries == p2->color_primaries &&
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p1->transfer_function == p2->transfer_function &&
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p1->matrix_coefficients == p2->matrix_coefficients &&
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p1->range == p2->range;
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}
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static inline void
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gdk_cicp_normalize (const GdkCicp *orig,
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GdkCicp *out)
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{
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memcpy (out, orig, sizeof (GdkCicp));
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/* ntsc */
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if (out->color_primaries == 6)
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out->color_primaries = 5;
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/* bt709 */
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if (out->transfer_function == 6 ||
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out->transfer_function == 14 ||
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out->transfer_function == 15)
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out->transfer_function = 1;
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/* bt601 */
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if (out->matrix_coefficients == 6)
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out->matrix_coefficients = 5;
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}
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/*< private >
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* gdk_cicp_equivalent:
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* @p1: a `GdkCicp`
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* @p2: another `GdkCicp`
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*
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* Determine whether two cicp tuples are functionally equivalent.
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*
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* Returns: whether @p1 and @p2 are functionally equivalent
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*/
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static inline gboolean
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gdk_cicp_equivalent (const GdkCicp *p1,
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const GdkCicp *p2)
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{
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GdkCicp n1, n2;
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if (gdk_cicp_equal (p1, p2))
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return TRUE;
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gdk_cicp_normalize (p1, &n1);
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gdk_cicp_normalize (p2, &n2);
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return gdk_cicp_equal (&n1, &n2);
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}
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const GdkCicp * gdk_cicp_params_get_cicp (GdkCicpParams *self);
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GdkCicpParams * gdk_cicp_params_new_for_cicp (const GdkCicp *cicp);
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G_END_DECLS
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