171 lines
6.6 KiB
C
171 lines
6.6 KiB
C
/*
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* Generic interface to a graphics panel device (TFT LCD, OLED and others).
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*
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* Copyright (C) 2015 Serge Vakulenko, <serge@vak.ru>
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*
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* Permission to use, copy, modify, and distribute this software
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* and its documentation for any purpose and without fee is hereby
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* granted, provided that the above copyright notice appear in all
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* copies and that both that the copyright notice and this
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* permission notice and warranty disclaimer appear in supporting
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* documentation, and that the name of the author not be used in
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* advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission.
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*
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* The author disclaim all warranties with regard to this
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* software, including all implied warranties of merchantability
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* and fitness. In no event shall the author be liable for any
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* special, indirect or consequential damages or any damages
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* whatsoever resulting from loss of use, data or profits, whether
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* in an action of contract, negligence or other tortious action,
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* arising out of or in connection with the use or performance of
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* this software.
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*/
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#ifndef _GPANEL_H
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#define _GPANEL_H
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/*
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* Proportional/fixed font structure.
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*/
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struct gpanel_font_t {
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const char * name; /* font name */
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int maxwidth; /* max width in pixels */
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unsigned int height; /* height in pixels */
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int ascent; /* ascent (baseline) height */
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int firstchar; /* first character in bitmap */
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int size; /* font size in characters */
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const unsigned short *bits; /* 16-bit right-padded bitmap data */
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const unsigned short *offset; /* offsets into bitmap data */
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const unsigned char *width; /* character widths or 0 if fixed */
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int defaultchar; /* default char (not glyph index) */
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long bits_size; /* # words of bits */
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};
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struct gpanel_pixel_t {
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int color; /* pixel color */
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int x, y; /* pixel position */
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};
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struct gpanel_clear_t {
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int color; /* pixel color */
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int xsize, ysize; /* screen size */
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};
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struct gpanel_line_t {
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int color; /* line color */
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int x0, y0; /* start point */
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int x1, y1; /* end point */
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};
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struct gpanel_rect_t {
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int color; /* border or fill color */
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int x0, y0; /* start point */
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int x1, y1; /* end point */
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};
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struct gpanel_circle_t {
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int color; /* border color */
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int x, y; /* center point */
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int radius; /* circle radius */
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};
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struct gpanel_image_t {
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int x, y; /* start point */
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int width, height; /* image size radius */
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const unsigned short *image; /* array of pixels */
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};
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struct gpanel_char_t {
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const struct gpanel_font_t *font; /* font data */
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int color; /* text color */
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int background; /* background color or -1 for transparent */
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int x, y; /* position */
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int sym; /* unicode symbol index */
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};
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struct gpanel_text_t {
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const struct gpanel_font_t *font; /* font data */
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int color; /* text color */
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int background; /* background color or -1 for transparent */
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int x, y; /* position */
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const char *text; /* UTF-8 text */
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};
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#define GPANEL_CLEAR _IOW('g', 1, struct gpanel_clear_t)
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#define GPANEL_PIXEL _IOW('g', 2, struct gpanel_pixel_t)
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#define GPANEL_LINE _IOW('g', 3, struct gpanel_line_t)
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#define GPANEL_RECT _IOW('g', 4, struct gpanel_rect_t)
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#define GPANEL_FILL _IOW('g', 5, struct gpanel_rect_t)
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#define GPANEL_CIRCLE _IOW('g', 6, struct gpanel_circle_t)
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#define GPANEL_IMAGE _IOW('g', 7, struct gpanel_image_t)
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#define GPANEL_CHAR _IOW('g', 8, struct gpanel_char_t)
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#define GPANEL_TEXT _IOW('g', 9, struct gpanel_text_t)
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#ifndef KERNEL
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/*
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* User-level library.
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*/
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int gpanel_open(const char *devname);
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void gpanel_close(void);
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void gpanel_clear(int color, int *xsize, int *ysize);
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void gpanel_pixel(int color, int x, int y);
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void gpanel_line(int color, int x0, int y0, int x1, int y1);
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void gpanel_rect(int color, int x0, int y0, int x1, int y1);
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void gpanel_fill(int color, int x0, int y0, int x1, int y1);
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void gpanel_fill_triangle(int color, int x0, int y0, int x1, int y1, int x2, int y2);
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void gpanel_circle(int color, int x, int y, int radius);
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void gpanel_image(int x, int y, int width, int height, const unsigned short *data);
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void gpanel_char(const struct gpanel_font_t *font, int color, int background, int x, int y, int sym);
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void gpanel_text(const struct gpanel_font_t *font, int color, int background, int x, int y, const char *text);
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int gpanel_text_width(const struct gpanel_font_t *font, const char *text, int nchars);
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extern int _gpanel_fd;
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#else /* KERNEL */
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/*
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* Kernel driver routines.
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*/
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struct uio;
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extern int gpanel_open(dev_t dev, int flag, int mode);
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extern int gpanel_close(dev_t dev, int flag, int mode);
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extern int gpanel_read(dev_t dev, struct uio *uio, int flag);
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extern int gpanel_write(dev_t dev, struct uio *uio, int flag);
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extern int gpanel_ioctl(dev_t dev, u_int cmd, caddr_t addr, int flag);
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extern int gpanel_read_byte(void);
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extern void gpanel_write_byte(int value);
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extern void gpanel_cs_active(void);
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extern void gpanel_cs_idle(void);
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extern void gpanel_rs_command(void);
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extern void gpanel_rs_data(void);
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extern void gpanel_wr_strobe(void);
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extern void gpanel_read_dir(void);
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extern void gpanel_write_dir(void);
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extern int gpanel_send_command(int value);
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extern int gpanel_send_data(int value);
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/*
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* Descriptor for access to the hardware-level driver.
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*/
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struct gpanel_hw {
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const char *name;
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void (*resize)(struct gpanel_hw *hw, int width, int height);
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void (*set_pixel)(int x, int y, int color);
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void (*fill_rectangle)(int x0, int y0, int x1, int y1, int color);
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void (*draw_image)(int x, int y, int width, int height,
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const unsigned short *data);
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void (*draw_glyph)(const struct gpanel_font_t *font,
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int color, int background, int x, int y, int width,
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const unsigned short *bits);
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};
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extern int gpanel_width;
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extern int gpanel_height;
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extern void st7781_init_display(struct gpanel_hw *hw);
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extern void nt35702_init_display(struct gpanel_hw *hw);
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extern void ili9341_init_display(struct gpanel_hw *hw);
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extern void s6d04h0_init_display(struct gpanel_hw *hw);
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#endif /* KERNEL */
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#endif /* _GPANEL_H */
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