31 lines
1.1 KiB
C
31 lines
1.1 KiB
C
// Palette and SCB (scanline control byte) accessors.
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//
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// Colors are 12-bit $0RGB (bits 11..8 red, 7..4 green, 3..0 blue).
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// The library forces color 0 of every palette to black; paletteSet
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// silently masks that entry to $000 regardless of what the caller
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// passed. See docs/DESIGN.md sections 5 and 10.
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#ifndef JOEYLIB_PALETTE_H
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#define JOEYLIB_PALETTE_H
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#include "platform.h"
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#include "surface.h"
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#include "types.h"
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// Load all 16 colors of a palette. colors16 must point to exactly 16
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// uint16_t values in $0RGB format.
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void paletteSet(SurfaceT *s, uint8_t paletteIndex, const uint16_t *colors16);
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// Read all 16 colors of a palette into out16.
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void paletteGet(const SurfaceT *s, uint8_t paletteIndex, uint16_t *out16);
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// Assign a single palette index (0..15) to a single scanline (0..199).
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void scbSet(SurfaceT *s, uint16_t line, uint8_t paletteIndex);
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// Assign a palette index to an inclusive range of scanlines.
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void scbSetRange(SurfaceT *s, uint16_t firstLine, uint16_t lastLine, uint8_t paletteIndex);
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// Read the palette index assigned to a scanline.
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uint8_t scbGet(const SurfaceT *s, uint16_t line);
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#endif
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