Revision d3c2a74d2be45498b1e545e3df718c5d4c04c1ea authored by hudson@andromeda.local on 01 August 2010, 17:58:24 UTC, committed by hudson@andromeda.local on 01 August 2010, 17:58:24 UTC
1 parent 6c9d040
bmp.h
#ifndef _bmp_h_
#define _bmp_h_
/** \file
* Drawing routines for the bitmap VRAM.
*
* These are Magic Lantern routines to draw shapes and text into
* the LVRAM for display on the LCD or HDMI output.
*/
/*
* Copyright (C) 2009 Trammell Hudson <hudson+ml@osresearch.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "dryos.h"
#include "font.h"
/** Returns a pointer to the real BMP vram */
static inline uint8_t *
bmp_vram(void)
{
return bmp_vram_info[1].vram2;
}
/** Returns the width, pitch and height of the BMP vram.
* These should check the current mode since we might be in
* HDMI output mode, which uses the full 960x540 space.
*/
static inline uint32_t bmp_width(void) { return 720; }
static inline uint32_t bmp_pitch(void) { return 960; }
static inline uint32_t bmp_height(void) { return 480; }
/** Font specifiers include the font, the fg color and bg color */
#define FONT_MASK 0x000F0000
#define FONT_HUGE 0x00080000
#define FONT_LARGE 0x00030000
#define FONT_MED 0x00020000
#define FONT_SMALL 0x00010000
#define FONT(font,fg,bg) ( 0 \
| ((font) & FONT_MASK) \
| ((bg) & 0xFF) << 8 \
| ((fg) & 0xFF) << 0 \
)
static inline struct font *
fontspec_font(
unsigned fontspec
)
{
switch( fontspec & FONT_MASK )
{
default:
case FONT_SMALL: return &font_small;
case FONT_MED: return &font_med;
case FONT_LARGE: return &font_large;
case FONT_HUGE: return &font_huge;
}
}
static inline unsigned
fontspec_fg(
unsigned fontspec
)
{
return (fontspec >> 0) & 0xFF;
}
static inline unsigned
fontspec_bg(
unsigned fontspec
)
{
return (fontspec >> 8) & 0xFF;
}
static inline unsigned
fontspec_height(
unsigned fontspec
)
{
return fontspec_font(fontspec)->height;
}
extern void
bmp_printf(
unsigned fontspec,
unsigned x,
unsigned y,
const char * fmt,
...
) __attribute__((format(printf,4,5)));
extern void
con_printf(
unsigned fontspec,
const char * fmt,
...
) __attribute__((format(printf,2,3)));
extern void
bmp_hexdump(
unsigned fontspec,
unsigned x,
unsigned y,
const void * buf,
size_t len
);
extern void
bmp_puts(
unsigned fontspec,
unsigned * x,
unsigned * y,
const char * s
);
/** Fill the screen with a bitmap palette */
extern void
bmp_draw_palette( void );
/** Fill a section of bitmap memory with solid color
* Only has a four-pixel resolution in X.
*/
extern void
bmp_fill(
uint8_t color,
uint32_t x,
uint32_t y,
uint32_t w,
uint32_t h
);
/** Some selected colors */
#define COLOR_EMPTY 0x00 // total transparent
#define COLOR_BG 0x14 // transparent gray
#define COLOR_BG_DARK 0x03 // transparent black
#define COLOR_WHITE 0x01 // Normal white
#define COLOR_BLUE 0x0B // normal blue
#define COLOR_RED 0x08 // normal red
#define COLOR_YELLOW 0x0F // normal yellow
static inline uint32_t
color_word(
uint8_t color
)
{
return 0
| ( color << 24 )
| ( color << 16 )
| ( color << 8 )
| ( color << 0 )
;
}
/** BMP file format.
* Offsets and meaning from:
* http://www.fastgraph.com/help/bmp_header_format.html
*/
struct bmp_file_t
{
uint16_t signature; // off 0
uint32_t size; // off 2, in bytes
uint16_t res_0; // off 6, must be 0
uint16_t res_1; // off 8. must be 0
uint8_t * image; // off 10, offset in bytes
uint32_t hdr_size; // off 14, must be 40
uint32_t width; // off 18, in pixels
uint32_t height; // off 22, in pixels
uint16_t planes; // off 26, must be 1
uint16_t bits_per_pixel; // off 28, 1, 4, 8 or 24
uint32_t compression; // off 30, 0=none, 1=RLE8, 2=RLE4
uint32_t image_size; // off 34, in bytes + padding
uint32_t hpix_per_meter; // off 38, unreliable
uint32_t vpix_per_meter; // off 42, unreliable
uint32_t num_colors; // off 46
uint32_t num_imp_colors; // off 50
} PACKED;
SIZE_CHECK_STRUCT( bmp_file_t, 54 );
extern struct bmp_file_t *
bmp_load(
const char * name
);
#endif
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