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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2015 Google, Inc.
*/
#include <libpayload.h>
#include <arch/types.h>
#include <stddef.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 screen boundary */
#define CBGFX_ERROR_SCREEN_BOUNDARY 3
/* drawing beyond canvas boundary */
#define CBGFX_ERROR_CANVAS_BOUNDARY 4
/* bitmap error: signature mismatch */
#define CBGFX_ERROR_BITMAP_SIGNATURE 0x10
/* bitmap error: unsupported format */
#define CBGFX_ERROR_BITMAP_FORMAT 0x11
/* bitmap error: invalid data */
#define CBGFX_ERROR_BITMAP_DATA 0x12
/* bitmap error: scaling out of range */
#define CBGFX_ERROR_SCALE_OUT_OF_RANGE 0x13
struct fraction {
int32_t nume;
int32_t deno;
};
struct scale {
struct fraction x;
struct fraction y;
};
struct vector {
union {
int32_t x;
int32_t width;
};
union {
int32_t y;
int32_t height;
};
};
struct rect {
struct vector offset;
struct vector size;
};
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.
*/
/*
* Load a bitmap file from cbfs
*
* Memory is allocated automatically and it's caller's responsibility to free it
*
* name: name of the bitmap file
* size: (OUT) size of the image
*
* return: pointer to the image data in memory or NULL on error
*/
void *load_bitmap(const char *name, size_t *size);
/*
* draw a box filled with a color on screen
*
* box: .offset points the coordinate of the top left corner and .size specifies
* width and height of the box. Both are relative to the canvas size thus scale
* from 0 to CANVAS_SCALE (0 to 100%).
* rgb: RGB color of the box.
*
* return: CBGFX_* error codes
*/
int draw_box(const struct rect *box, const struct rgb_color *rgb);
/*
* Clear the canvas
*/
int clear_canvas(struct rgb_color *rgb);
/*
* Clear the screen
*/
int clear_screen(struct rgb_color *rgb);
/*
* Draw a bitmap image on screen.
*
* top_left_rel: coordinate of the top left corner of the image relative to the
* canvas (0 - CANVAS_SCALE). If scale_rel is zero, this is treated as absolute
* coordinate.
* scale_rel: scale factor relative to the canvas width (0 - CANVAS_SCALE). If
* this is zero, scaling is turned off and the image is rendered with the
* original size.
* bitmap: pointer to the bitmap data, starting from the file header.
* size: size of the bitmap data
*
* return: CBGFX_* error codes
*/
int draw_bitmap(const struct vector *top_left_rel,
size_t scale_rel, const void *bitmap, size_t size);
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