1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2006 Dan Everton
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
20 ****************************************************************************/
24 #include "sim-ui-defines.h"
25 #include "system.h" /* for MIN() and MAX() */
29 void sdl_update_rect(SDL_Surface
*surface
, int x_start
, int y_start
, int width
,
30 int height
, int max_x
, int max_y
,
31 unsigned long (*getpixel
)(int, int))
37 ymax
= y_start
+ height
;
38 xmax
= x_start
+ width
;
45 SDL_LockSurface(surface
);
47 dest
.w
= display_zoom
;
48 dest
.h
= display_zoom
;
50 for (x
= x_start
; x
< xmax
; x
++) {
51 dest
.x
= x
* display_zoom
;
54 for (y
= y_start
; y
< MIN(ymax
, LCD_SPLIT_POS
); y
++) {
55 dest
.y
= y
* display_zoom
;
57 SDL_FillRect(surface
, &dest
, (Uint32
)(getpixel(x
, y
) | 0x80));
59 for (y
= MAX(y_start
, LCD_SPLIT_POS
); y
< ymax
; y
++) {
60 dest
.y
= (y
+ LCD_SPLIT_LINES
) * display_zoom
;
62 SDL_FillRect(surface
, &dest
, (Uint32
)getpixel(x
, y
));
65 for (y
= y_start
; y
< ymax
; y
++) {
66 dest
.y
= y
* display_zoom
;
68 SDL_FillRect(surface
, &dest
, (Uint32
)getpixel(x
, y
));
73 SDL_UnlockSurface(surface
);
76 void sdl_gui_update(SDL_Surface
*surface
, int x_start
, int y_start
, int width
,
77 int height
, int max_x
, int max_y
, int ui_x
, int ui_y
)
79 if (x_start
+ width
> max_x
)
80 width
= max_x
- x_start
;
81 if (y_start
+ height
> max_y
)
82 height
= max_y
- y_start
;
84 SDL_Rect src
= {x_start
* display_zoom
, y_start
* display_zoom
,
85 width
* display_zoom
, height
* display_zoom
};
86 SDL_Rect dest
= {(ui_x
+ x_start
) * display_zoom
,
87 (ui_y
+ y_start
) * display_zoom
,
88 width
* display_zoom
, height
* display_zoom
};
90 if (surface
->flags
& SDL_SRCALPHA
) /* alpha needs a black background */
91 SDL_FillRect(gui_surface
, &dest
, 0);
93 SDL_BlitSurface(surface
, &src
, gui_surface
, &dest
);
95 SDL_Flip(gui_surface
);
98 /* set a range of bitmap indices to a gradient from startcolour to endcolour */
99 void sdl_set_gradient(SDL_Surface
*surface
, SDL_Color
*start
, SDL_Color
*end
,
100 int first
, int steps
)
103 SDL_Color palette
[steps
];
105 for (i
= 0; i
< steps
; i
++) {
106 palette
[i
].r
= start
->r
+ (end
->r
- start
->r
) * i
/ (steps
- 1);
107 palette
[i
].g
= start
->g
+ (end
->g
- start
->g
) * i
/ (steps
- 1);
108 palette
[i
].b
= start
->b
+ (end
->b
- start
->b
) * i
/ (steps
- 1);
111 SDL_SetPalette(surface
, SDL_LOGPAL
|SDL_PHYSPAL
, palette
, first
, steps
);