binutils-gdb/sim/bfin/gui.c

293 lines
7.0 KiB
C

/* Blackfin GUI (SDL) helper code
Copyright (C) 2010-2012 Free Software Foundation, Inc.
Contributed by Analog Devices, Inc.
This file is part of simulators.
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 3 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, see <http://www.gnu.org/licenses/>. */
#include "config.h"
#ifdef HAVE_SDL
# include <SDL.h>
#endif
#ifdef HAVE_DLFCN_H
# include <dlfcn.h>
#endif
#include "libiberty.h"
#include "gui.h"
#ifdef HAVE_SDL
static struct {
void *handle;
int (*Init) (Uint32 flags);
void (*Quit) (void);
SDL_Surface *(*SetVideoMode) (int width, int height, int bpp, Uint32 flags);
void (*WM_SetCaption) (const char *title, const char *icon);
int (*ShowCursor) (int toggle);
int (*LockSurface) (SDL_Surface *surface);
void (*UnlockSurface) (SDL_Surface *surface);
void (*GetRGB) (Uint32 pixel, const SDL_PixelFormat * const fmt, Uint8 *r, Uint8 *g, Uint8 *b);
Uint32 (*MapRGB) (const SDL_PixelFormat * const format, const Uint8 r, const Uint8 g, const Uint8 b);
void (*UpdateRect) (SDL_Surface *screen, Sint32 x, Sint32 y, Uint32 w, Uint32 h);
} sdl;
static const char * const sdl_syms[] =
{
"SDL_Init",
"SDL_Quit",
"SDL_SetVideoMode",
"SDL_WM_SetCaption",
"SDL_ShowCursor",
"SDL_LockSurface",
"SDL_UnlockSurface",
"SDL_GetRGB",
"SDL_MapRGB",
"SDL_UpdateRect",
};
struct gui_state {
SDL_Surface *screen;
const SDL_PixelFormat *format;
int throttle, throttle_limit;
enum gui_color color;
int curr_line;
};
/* Load the SDL lib on the fly to avoid hard linking against it. */
static int
bfin_gui_sdl_setup (void)
{
int i;
uintptr_t **funcs;
if (sdl.handle)
return 0;
sdl.handle = dlopen ("libSDL-1.2.so.0", RTLD_LAZY);
if (sdl.handle == NULL)
return -1;
funcs = (void *) &sdl.Init;
for (i = 0; i < ARRAY_SIZE (sdl_syms); ++i)
{
funcs[i] = dlsym (sdl.handle, sdl_syms[i]);
if (funcs[i] == NULL)
{
dlclose (sdl.handle);
sdl.handle = NULL;
return -1;
}
}
return 0;
}
static const SDL_PixelFormat *bfin_gui_color_format (enum gui_color color);
void *
bfin_gui_setup (void *state, int enabled, int width, int height,
enum gui_color color)
{
if (bfin_gui_sdl_setup ())
return NULL;
/* Create an SDL window if enabled and we don't have one yet. */
if (enabled && !state)
{
struct gui_state *gui = xmalloc (sizeof (*gui));
if (!gui)
return NULL;
if (sdl.Init (SDL_INIT_VIDEO))
goto error;
gui->color = color;
gui->format = bfin_gui_color_format (gui->color);
gui->screen = sdl.SetVideoMode (width, height, 32,
SDL_ANYFORMAT|SDL_HWSURFACE);
if (!gui->screen)
{
sdl.Quit();
goto error;
}
sdl.WM_SetCaption ("GDB Blackfin Simulator", NULL);
sdl.ShowCursor (0);
gui->curr_line = 0;
gui->throttle = 0;
gui->throttle_limit = 0xf; /* XXX: let people control this ? */
return gui;
error:
free (gui);
return NULL;
}
/* Else break down a window if disabled and we had one. */
else if (!enabled && state)
{
sdl.Quit();
free (state);
return NULL;
}
/* Retain existing state, whatever that may be. */
return state;
}
static int
SDL_ConvertBlitLineFrom (const Uint8 *src, const SDL_PixelFormat * const format,
SDL_Surface *dst, int dsty)
{
Uint8 r, g, b;
Uint32 *pixels;
unsigned i, j;
if (SDL_MUSTLOCK (dst))
if (sdl.LockSurface (dst))
return 1;
pixels = dst->pixels;
pixels += (dsty * dst->pitch / 4);
for (i = 0; i < dst->w; ++i)
{
/* Exract the packed source pixel; RGB or BGR. */
Uint32 pix = 0;
for (j = 0; j < format->BytesPerPixel; ++j)
if (format->Rshift)
pix = (pix << 8) | src[j];
else
pix = pix | ((Uint32)src[j] << (j * 8));
/* Unpack the source pixel into its components. */
sdl.GetRGB (pix, format, &r, &g, &b);
/* Translate into the screen pixel format. */
*pixels++ = sdl.MapRGB (dst->format, r, g, b);
src += format->BytesPerPixel;
}
if (SDL_MUSTLOCK (dst))
sdl.UnlockSurface (dst);
sdl.UpdateRect (dst, 0, dsty, dst->w, 1);
return 0;
}
unsigned
bfin_gui_update (void *state, const void *source, unsigned nr_bytes)
{
struct gui_state *gui = state;
int ret;
if (!gui)
return 0;
/* XXX: Make this an option ? */
gui->throttle = (gui->throttle + 1) & gui->throttle_limit;
if (gui->throttle)
return 0;
ret = SDL_ConvertBlitLineFrom (source, gui->format, gui->screen,
gui->curr_line);
if (ret)
return 0;
gui->curr_line = (gui->curr_line + 1) % gui->screen->h;
return nr_bytes;
}
#define FMASK(cnt, shift) (((1 << (cnt)) - 1) << (shift))
#define _FORMAT(bpp, rcnt, gcnt, bcnt, acnt, rsh, gsh, bsh, ash) \
NULL, bpp, (bpp)/8, 8-(rcnt), 8-(gcnt), 8-(bcnt), 8-(acnt), rsh, gsh, bsh, ash, \
FMASK (rcnt, rsh), FMASK (gcnt, gsh), FMASK (bcnt, bsh), FMASK (acnt, ash),
#define FORMAT(rcnt, gcnt, bcnt, acnt, rsh, gsh, bsh, ash) \
_FORMAT(((((rcnt) + (gcnt) + (bcnt) + (acnt)) + 7) / 8) * 8, \
rcnt, gcnt, bcnt, acnt, rsh, gsh, bsh, ash)
static const SDL_PixelFormat sdl_rgb_565 =
{
FORMAT (5, 6, 5, 0, 11, 5, 0, 0)
};
static const SDL_PixelFormat sdl_bgr_565 =
{
FORMAT (5, 6, 5, 0, 0, 5, 11, 0)
};
static const SDL_PixelFormat sdl_rgb_888 =
{
FORMAT (8, 8, 8, 0, 16, 8, 0, 0)
};
static const SDL_PixelFormat sdl_bgr_888 =
{
FORMAT (8, 8, 8, 0, 0, 8, 16, 0)
};
static const SDL_PixelFormat sdl_rgba_8888 =
{
FORMAT (8, 8, 8, 8, 24, 16, 8, 0)
};
static const struct {
const char *name;
const SDL_PixelFormat *format;
enum gui_color color;
} color_spaces[] = {
{ "rgb565", &sdl_rgb_565, GUI_COLOR_RGB_565, },
{ "bgr565", &sdl_bgr_565, GUI_COLOR_BGR_565, },
{ "rgb888", &sdl_rgb_888, GUI_COLOR_RGB_888, },
{ "bgr888", &sdl_bgr_888, GUI_COLOR_BGR_888, },
{ "rgba8888", &sdl_rgba_8888, GUI_COLOR_RGBA_8888, },
};
enum gui_color bfin_gui_color (const char *color)
{
int i;
if (!color)
goto def;
for (i = 0; i < ARRAY_SIZE (color_spaces); ++i)
if (!strcmp (color, color_spaces[i].name))
return color_spaces[i].color;
/* Pick a random default. */
def:
return GUI_COLOR_RGB_888;
}
static const SDL_PixelFormat *bfin_gui_color_format (enum gui_color color)
{
int i;
for (i = 0; i < ARRAY_SIZE (color_spaces); ++i)
if (color == color_spaces[i].color)
return color_spaces[i].format;
return NULL;
}
int bfin_gui_color_depth (enum gui_color color)
{
const SDL_PixelFormat *format = bfin_gui_color_format (color);
return format ? format->BitsPerPixel : 0;
}
#endif