initial commit

atari800/src/colours_ntsc.h

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+#ifndef COLOURS_NTSC_H_
+#define COLOURS_NTSC_H_
+
+#include "config.h"
+#include "colours.h"
+#include "colours_external.h"
+
+#ifndef M_PI
+# define M_PI 3.141592653589793
+#endif
+
+/* NTSC palette's current setup - generic controls. */
+extern Colours_setup_t COLOURS_NTSC_setup;
+/* External NTSC palette. */
+extern COLOURS_EXTERNAL_t COLOURS_NTSC_external;
+
+/* Updates the NTSC palette - should be called after changing palette setup
+   or loading/unloading an external palette. */
+void COLOURS_NTSC_Update(int colourtable[256]);
+/* Restores default values for NTSC-specific colour controls.
+   Colours_NTSC_Update should be called afterwards to apply changes. */
+void COLOURS_NTSC_RestoreDefaults(void);
+
+/* Writes the NTSC palette (internal or external) as YIQ triplets in
+   YIQ_TABLE. START_ANGLE defines the phase shift of chroma #1. This function
+   is to be used exclusively by the NTSC Filter module. */
+void COLOURS_NTSC_GetYIQ(double yiq_table[768], const double start_angle);
+
+/* Read/write to configuration file. */
+int COLOURS_NTSC_ReadConfig(char *option, char *ptr);
+void COLOURS_NTSC_WriteConfig(FILE *fp);
+
+/* NTSC Colours initialisation and processing of command-line arguments. */
+int COLOURS_NTSC_Initialise(int *argc, char *argv[]);
+
+/* Function for getting the NTSC-specific color preset. */
+Colours_preset_t COLOURS_NTSC_GetPreset(void);
+
+#endif /* COLOURS_NTSC_H_ */