1 /* Blackfin GUI (SDL) helper code
3 Copyright (C) 2010-2011 Free Software Foundation, Inc.
4 Contributed by Analog Devices, Inc.
6 This file is part of simulators.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
30 #include "libiberty.h"
37 int (*Init
) (Uint32 flags
);
39 SDL_Surface
*(*SetVideoMode
) (int width
, int height
, int bpp
, Uint32 flags
);
40 void (*WM_SetCaption
) (const char *title
, const char *icon
);
41 int (*ShowCursor
) (int toggle
);
42 int (*LockSurface
) (SDL_Surface
*surface
);
43 void (*UnlockSurface
) (SDL_Surface
*surface
);
44 void (*GetRGB
) (Uint32 pixel
, const SDL_PixelFormat
* const fmt
, Uint8
*r
, Uint8
*g
, Uint8
*b
);
45 Uint32 (*MapRGB
) (const SDL_PixelFormat
* const format
, const Uint8 r
, const Uint8 g
, const Uint8 b
);
46 void (*UpdateRect
) (SDL_Surface
*screen
, Sint32 x
, Sint32 y
, Uint32 w
, Uint32 h
);
49 static const char * const sdl_syms
[] = {
64 const SDL_PixelFormat
*format
;
65 int throttle
, throttle_limit
;
70 /* Load the SDL lib on the fly to avoid hard linking against it. */
72 bfin_gui_sdl_setup (void)
80 sdl
.handle
= dlopen ("libSDL-1.2.so.0", RTLD_LAZY
);
81 if (sdl
.handle
== NULL
)
84 funcs
= (void *) &sdl
.Init
;
85 for (i
= 0; i
< ARRAY_SIZE (sdl_syms
); ++i
)
87 funcs
[i
] = dlsym (sdl
.handle
, sdl_syms
[i
]);
99 static const SDL_PixelFormat
*bfin_gui_color_format (enum gui_color color
);
102 bfin_gui_setup (void *state
, int enabled
, int width
, int height
,
103 enum gui_color color
)
105 if (bfin_gui_sdl_setup ())
108 /* Create an SDL window if enabled and we don't have one yet. */
109 if (enabled
&& !state
)
111 struct gui_state
*gui
= xmalloc (sizeof (*gui
));
115 if (sdl
.Init (SDL_INIT_VIDEO
))
119 gui
->format
= bfin_gui_color_format (gui
->color
);
120 gui
->screen
= sdl
.SetVideoMode (width
, height
, 32,
121 SDL_ANYFORMAT
|SDL_HWSURFACE
);
128 sdl
.WM_SetCaption ("GDB Blackfin Simulator", NULL
);
132 gui
->throttle_limit
= 0xf; /* XXX: let people control this ? */
140 /* Else break down a window if disabled and we had one. */
141 else if (!enabled
&& state
)
148 /* Retain existing state, whatever that may be. */
153 SDL_ConvertBlitLineFrom (const Uint8
*src
, const SDL_PixelFormat
* const format
,
154 SDL_Surface
*dst
, int dsty
)
160 if (SDL_MUSTLOCK (dst
))
161 if (sdl
.LockSurface (dst
))
164 pixels
= dst
->pixels
;
165 pixels
+= (dsty
* dst
->pitch
/ 4);
167 for (i
= 0; i
< dst
->w
; ++i
)
169 /* Exract the packed source pixel; RGB or BGR. */
171 for (j
= 0; j
< format
->BytesPerPixel
; ++j
)
173 pix
= (pix
<< 8) | src
[j
];
175 pix
= pix
| ((Uint32
)src
[j
] << (j
* 8));
177 /* Unpack the source pixel into its components. */
178 sdl
.GetRGB (pix
, format
, &r
, &g
, &b
);
179 /* Translate into the screen pixel format. */
180 *pixels
++ = sdl
.MapRGB (dst
->format
, r
, g
, b
);
182 src
+= format
->BytesPerPixel
;
185 if (SDL_MUSTLOCK (dst
))
186 sdl
.UnlockSurface (dst
);
188 sdl
.UpdateRect (dst
, 0, dsty
, dst
->w
, 1);
194 bfin_gui_update (void *state
, const void *source
, unsigned nr_bytes
)
196 struct gui_state
*gui
= state
;
202 /* XXX: Make this an option ? */
203 gui
->throttle
= (gui
->throttle
+ 1) & gui
->throttle_limit
;
207 ret
= SDL_ConvertBlitLineFrom (source
, gui
->format
, gui
->screen
,
212 gui
->curr_line
= (gui
->curr_line
+ 1) % gui
->screen
->h
;
217 #define FMASK(cnt, shift) (((1 << (cnt)) - 1) << (shift))
218 #define _FORMAT(bpp, rcnt, gcnt, bcnt, acnt, rsh, gsh, bsh, ash) \
219 NULL, bpp, (bpp)/8, 8-(rcnt), 8-(gcnt), 8-(bcnt), 8-(acnt), rsh, gsh, bsh, ash, \
220 FMASK (rcnt, rsh), FMASK (gcnt, gsh), FMASK (bcnt, bsh), FMASK (acnt, ash),
221 #define FORMAT(rcnt, gcnt, bcnt, acnt, rsh, gsh, bsh, ash) \
222 _FORMAT(((((rcnt) + (gcnt) + (bcnt) + (acnt)) + 7) / 8) * 8, \
223 rcnt, gcnt, bcnt, acnt, rsh, gsh, bsh, ash)
225 static const SDL_PixelFormat sdl_rgb_565
= {
226 FORMAT (5, 6, 5, 0, 11, 5, 0, 0)
228 static const SDL_PixelFormat sdl_bgr_565
= {
229 FORMAT (5, 6, 5, 0, 0, 5, 11, 0)
231 static const SDL_PixelFormat sdl_rgb_888
= {
232 FORMAT (8, 8, 8, 0, 16, 8, 0, 0)
234 static const SDL_PixelFormat sdl_bgr_888
= {
235 FORMAT (8, 8, 8, 0, 0, 8, 16, 0)
237 static const SDL_PixelFormat sdl_rgba_8888
= {
238 FORMAT (8, 8, 8, 8, 24, 16, 8, 0)
241 static const struct {
243 const SDL_PixelFormat
*format
;
244 enum gui_color color
;
246 { "rgb565", &sdl_rgb_565
, GUI_COLOR_RGB_565
, },
247 { "bgr565", &sdl_bgr_565
, GUI_COLOR_BGR_565
, },
248 { "rgb888", &sdl_rgb_888
, GUI_COLOR_RGB_888
, },
249 { "bgr888", &sdl_bgr_888
, GUI_COLOR_BGR_888
, },
250 { "rgba8888", &sdl_rgba_8888
, GUI_COLOR_RGBA_8888
, },
253 enum gui_color
bfin_gui_color (const char *color
)
260 for (i
= 0; i
< ARRAY_SIZE (color_spaces
); ++i
)
261 if (!strcmp (color
, color_spaces
[i
].name
))
262 return color_spaces
[i
].color
;
264 /* Pick a random default. */
266 return GUI_COLOR_RGB_888
;
269 static const SDL_PixelFormat
*bfin_gui_color_format (enum gui_color color
)
273 for (i
= 0; i
< ARRAY_SIZE (color_spaces
); ++i
)
274 if (color
== color_spaces
[i
].color
)
275 return color_spaces
[i
].format
;
280 int bfin_gui_color_depth (enum gui_color color
)
282 const SDL_PixelFormat
*format
= bfin_gui_color_format (color
);
283 return format
? format
->BitsPerPixel
: 0;