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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2015 Google, Inc.
*/
#include <stdint.h>
/*
* API error codes
*/
#define CBGFX_SUCCESS 0
/* unknown error */
#define CBGFX_ERROR_UNKNOWN 1
/* failed to initialize cbgfx library */
#define CBGFX_ERROR_INIT 2
/* drawing beyond canvas boundary */
#define CBGFX_ERROR_BOUNDARY 3
struct vector {
union {
uint32_t x;
uint32_t width;
};
union {
uint32_t y;
uint32_t height;
};
};
struct rgb_color {
uint8_t red;
uint8_t green;
uint8_t blue;
};
/*
* Resolution of scale parameters used to describe height, width, coordinate,
* etc. relative to the canvas. For example, if it's 100, scales range from 0 to
* 100%.
*/
#define CANVAS_SCALE 100
/*
* The coordinate system is expected to have (0, 0) at top left corner with
* y values increasing towards bottom of screen.
*/
/*
* draw a box filled with a color on screen
*
* top_left_rel: coordinate of top left corner of the box, relative to canvas.
* (0 - CANVAS_SCALE).
* size_rel: width and height of the box, relative to canvas. (0 - CANVAS_SCALE)
* rgb: RGB color of the box.
*
* return: CBGFX_* error codes
*/
int draw_box(const struct vector *top_left_rel,
const struct vector *size_rel,
const struct rgb_color *rgb);
/*
* Clear the canvas
*/
int clear_canvas(struct rgb_color *rgb);
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