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/*
*
* Copyright (C) 2015 Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#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 or canvas boundary */
#define CBGFX_ERROR_BOUNDARY 3
/* invalid parameter */
#define CBGFX_ERROR_INVALID_PARAMETER 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
/* invalid framebuffer info */
#define CBGFX_ERROR_FRAMEBUFFER_INFO 0x14
/* invalid framebuffer address */
#define CBGFX_ERROR_FRAMEBUFFER_ADDR 0x15
/* portrait screen not supported */
#define CBGFX_ERROR_PORTRAIT_SCREEN 0x16
struct fraction {
int32_t n;
int32_t d;
};
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.
*/
/**
* 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);
/**
* Draw a box with rounded corners on screen.
*
* @param[in] pos_rel Coordinate of the top left corner of the box relative to
* the canvas.
* @param[in] dim_rel Width and height of the image relative to the canvas.
* @param[in] rgb Color of the border of the box.
* @param[in] thickness Thickness of the border relative to the canvas. If zero
* is given, the box will be filled with the rgb color.
* @param[in] radius Radius of the rounded corners relative to the canvas. A
* zero value indicates sharp corners will be drawn.
*
* @return CBGFX_* error codes
*/
int draw_rounded_box(const struct scale *pos_rel, const struct scale *dim_rel,
const struct rgb_color *rgb,
const struct fraction *thickness,
const struct fraction *radius);
/**
* Draw a horizontal or vertical line segment on screen. If horizontal, pos1
* must be the left endpoint. If vertical, pos1 must be the top endpoint. When
* the specified thickness is zero (or truncated to zero), a line with 1-pixel
* width will be drawn.
*
* @param[in] pos1 Start position of the line relative to the canvas.
* @param[in] pos2 End position of the line relative to the canvas.
* @param[in] thickness Thickness of the line relative to the canvas.
* @param[in] rgb Color of the line.
*
* @return CBGFX_* error codes
*/
int draw_line(const struct scale *pos1, const struct scale *pos2,
const struct fraction *thickness, const struct rgb_color *rgb);
/**
* Clear the canvas
*/
int clear_canvas(const struct rgb_color *rgb);
/**
* Clear the screen
*/
int clear_screen(const struct rgb_color *rgb);
/**
* Draw a bitmap image using position and size relative to the canvas
*
* @param[in] bitmap Pointer to the bitmap data, starting from file header
* @param[in] size Size of the bitmap data
* @param[in] pos_rel Coordinate of the pivot relative to the canvas
* @param[in] dim_rel Width and height of the image relative to the canvas
* width and height. They must not exceed 1 (=100%). If one
* is zero, it's derived from the other to keep the aspect
* ratio.
* @param[in] flags lower 8 bits is Pivot position. Use PIVOT_H_* and
* PIVOT_V_* flags.
* Bit 9 is bit to indicate if we invert the rendering.
* 0 = render image as is, 1 = invert image.
*
* @return CBGFX_* error codes
*
* 'Pivot' is a point of the image based on which the image is positioned.
* For example, if a pivot is set to PIVOT_H_CENTER|PIVOT_V_CENTER, the image is
* positioned so that pos_rel matches the center of the image.
*/
int draw_bitmap(const void *bitmap, size_t size,
const struct scale *pos_rel, const struct scale *dim_rel,
uint32_t flags);
/* Pivot flags. See the draw_bitmap description. */
#define PIVOT_H_LEFT (1 << 0)
#define PIVOT_H_CENTER (1 << 1)
#define PIVOT_H_RIGHT (1 << 2)
#define PIVOT_V_TOP (1 << 3)
#define PIVOT_V_CENTER (1 << 4)
#define PIVOT_V_BOTTOM (1 << 5)
#define PIVOT_MASK 0x000000ff
/* invert flag */
#define INVERT_SHIFT 8
#define INVERT_COLORS (1 << INVERT_SHIFT)
/**
* Draw a bitmap image at screen coordinate with no scaling
*
* @param[in] bitmap Pointer to the bitmap data, starting from file header
* @param[in] size Size of the bitmap data
* @param[in] pos Screen coordinate of upper left corner of the image.
*
* @return CBGFX_* error codes
*/
int draw_bitmap_direct(const void *bitmap, size_t size,
const struct vector *top_left);
/**
* Get width and height of projected image
*
* @param[in] bitmap Pointer to the bitmap data, starting from file header
* @param[in] sz Size of the bitmap data
* @param[i/o] dim_rel Width and height of the image relative to the canvas
* width and height. They must not exceed 1 (=100%).
* On return, it contains automatically calculated width
* and/or height.
*
* @return CBGFX_* error codes
*
* It returns the width and height of the projected image. If the input height
* is zero, it's derived from the input width to keep the aspect ratio, and vice
* versa. If both are zero, the width and the height which can project the image
* in the original size are returned.
*/
int get_bitmap_dimension(const void *bitmap, size_t sz, struct scale *dim_rel);
/**
* Setup alpha and rgb values for alpha blending. When alpha is != 0,
* this enables a translucent layer of color (defined by rgb) to be
* blended at a given translucency (alpha) to all things drawn. Call
* clear_blend() to disable alpha blending.
*
* @param[in] rgb Color for transparency
* @param[in] alpha Opacity of color, from 0-255 where
* 0 = completely transparent (no blending)
* 255 = max alpha argument
*
* @return CBGFX_* error codes
*/
int set_blend(const struct rgb_color *rgb, uint8_t alpha);
/**
* Clear alpha and rgb values, thus disabling any alpha blending.
*
* @return CBGFX_* error codes
*/
void clear_blend(void);
/**
* For calculating Alpha value from % opacity
* For reference:
* 255 = max alpha argument
* 0 = min alpha argument, 0% opacity
*/
#define ALPHA(percentage) MIN(255, (256 * percentage / 100))
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