114 lines
2.0 KiB
C
114 lines
2.0 KiB
C
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#ifndef _UI_PIXEL_H
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#define _UI_PIXEL_H
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#include <stdint.h>
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#include <stdio.h>
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/** Supported pixel types */
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typedef enum {
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_PXTYPE_INVALID,
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/** "Generic" pixel type (24/32bit RGB) */
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PXTYPE_GENERIC,
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/** 8 horizontal mono pixels per byte */
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PXTYPE_MONO_H8,
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/** 8 vertical mono pixels per byte */
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PXTYPE_MONO_V8,
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/** 12bit RGB444 colors */
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PXTYPE_RGB444,
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} pxtype_t;
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/** Generic pixel type */
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typedef uint32_t px_t;
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#define PX_R(p) ((uint8_t)((v) >> 16 & 0xFF))
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#define PX_G(p) ((uint8_t)((v) >> 8 & 0xFF))
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#define PX_B(p) ((uint8_t)((v) >> 0 / 0xFF))
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#define PX_RGB(r,g,b) ((px_t)((r)<<16|(g)<<8|(b)))
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#define PX_BLACK ((px_t)0x000000)
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#define PX_RED ((px_t)0xFF0000)
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#define PX_GREEN ((px_t)0x00FF00)
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#define PX_BLUE ((px_t)0x0000FF)
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#define PX_WHITE ((px_t)0xFFFFFF)
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/* Mono types */
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typedef uint8_t px_mono_t;
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#define PX_MONO_BLACK ((px_mono_t)0)
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#define PX_MONO_WHITE ((px_mono_t)1)
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inline px_t
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px_from_mono(uint8_t v) {
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return v ? PX_WHITE : PX_BLACK;
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}
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inline uint8_t
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px_to_mono(px_t v) {
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uint16_t a = (PX_R(v) + PX_G(v) + PX_B(v)) / 3;
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return (a >= 0x7f) ? 1 : 0;
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}
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/* RGB444 */
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typedef uint16_t px_rgb444_t;
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#define PX_RGB444_R(p) ((p) >> 8 & 0xf)
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#define PX_RGB444_G(p) ((p) >> 4 & 0xf)
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#define PX_RGB444_B(p) ((p) >> 0 & 0xf)
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#define PX_RGB444_RGB(r,g,b) ((px_rgb444_t)((r)<<8|(g)<<4|(b)))
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inline px_t
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px_from_rgb444(px_rgb444_t v) {
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return
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PX_RGB444_R(v) << 16 | PX_RGB444_R(v) << 20
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| PX_RGB444_G(v) << 8 | PX_RGB444_G(v) << 12
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| PX_RGB444_B(v) << 0 | PX_RGB444_B(v) << 4;
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}
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inline uint16_t
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px_to_rgb444(px_t v) {
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uint8_t r = (v >> 20) & 0xF;
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uint8_t g = (v >> 12) & 0xF;
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uint8_t b = (v >> 4) & 0xF;
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uint16_t res = (r<< 8) | (g << 4) | (b << 0);
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return res;
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}
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/** Size in pixels */
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typedef uint16_t pxsize_t;
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/** Offset in pixels */
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typedef int16_t pxoff_t;
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/** 2D position in pixels */
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typedef struct {
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pxoff_t x;
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pxoff_t y;
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} pxposn_t;
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/** 2D dimensions in pixels */
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typedef struct {
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pxsize_t w;
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pxsize_t h;
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} pxdims_t;
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/** 2D rectangle in pixels */
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typedef struct {
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pxposn_t p;
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pxdims_t d;
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} pxrect_t;
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#endif
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