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1 /*
2     SDL - Simple DirectMedia Layer
3     Copyright (C) 1997-2012 Sam Lantinga
4 
5     This library is free software; you can redistribute it and/or
6     modify it under the terms of the GNU Lesser General Public
7     License as published by the Free Software Foundation; either
8     version 2.1 of the License, or (at your option) any later version.
9 
10     This library is distributed in the hope that it will be useful,
11     but WITHOUT ANY WARRANTY; without even the implied warranty of
12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13     Lesser General Public License for more details.
14 
15     You should have received a copy of the GNU Lesser General Public
16     License along with this library; if not, write to the Free Software
17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
18 
19     Sam Lantinga
20     slouken@libsdl.org
21 
22     Micah Dowty
23     micahjd@users.sourceforge.net
24 */
25 #include "SDL_config.h"
26 
27 #include "SDL_video.h"
28 #include "SDL_mouse.h"
29 #include "../SDL_sysvideo.h"
30 #include "../SDL_pixels_c.h"
31 #include "../../events/SDL_events_c.h"
32 
33 #include "SDL_pgvideo.h"
34 #include "SDL_pgevents_c.h"
35 
36 #define PGVID_DRIVER_NAME "picogui"
37 
38 /* Initialization/Query functions */
39 static int PG_VideoInit(_THIS, SDL_PixelFormat *vformat);
40 static SDL_Rect **PG_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
41 static SDL_Surface *PG_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
42 static int PG_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
43 static void PG_VideoQuit(_THIS);
44 
45 /* Hardware surface functions */
46 static int PG_AllocHWSurface(_THIS, SDL_Surface *surface);
47 static int PG_LockHWSurface(_THIS, SDL_Surface *surface);
48 static void PG_UnlockHWSurface(_THIS, SDL_Surface *surface);
49 static void PG_FreeHWSurface(_THIS, SDL_Surface *surface);
50 
51 /* etc. */
52 static void PG_UpdateRects(_THIS, int numrects, SDL_Rect *rects);
53 
54 // The implementation dependent data for the window manager cursor
55 struct WMcursor {
56   /* Our cursor is a PicoGUI theme */
57   pghandle theme;
58 } ;
59 
60 /* WM functions */
61 void PG_SetCaption(_THIS, const char *title, const char *icon);
62 WMcursor * PG_CreateWMCursor (_THIS,Uint8 * data, Uint8 * mask,
63 			      int w, int h, int hot_x, int hot_y);
64 void PG_FreeWMCursor (_THIS, WMcursor * cursor);
65 void PG_WarpWMCursor(_THIS, Uint16 x, Uint16 y);
66 int PG_ShowWMCursor (_THIS, WMcursor * cursor);
67 
68 /* PicoGUI driver bootstrap functions */
69 
PG_Available(void)70 static int PG_Available(void)
71 {
72         /* FIXME: The current client lib doesn't give a way to see if the picogui
73 	 *        server is reachable without causing a fatal error if it isn't.
74 	 *        This should be fixed in cli_c2, but until then assume we can
75 	 *        connect. Since more common drivers like X11 are probed first anyway,
76 	 *        this shouldn't be a huge problem.
77 	 */
78 	return(1);
79 }
80 
PG_DeleteDevice(SDL_VideoDevice * device)81 static void PG_DeleteDevice(SDL_VideoDevice *device)
82 {
83 	SDL_free(device->hidden);
84 	SDL_free(device);
85 }
86 
PG_CreateDevice(int devindex)87 static SDL_VideoDevice *PG_CreateDevice(int devindex)
88 {
89 	SDL_VideoDevice *device;
90 
91 	/* Initialize all variables that we clean on shutdown */
92 	device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice));
93 	if ( device ) {
94 		SDL_memset(device, 0, (sizeof *device));
95 		device->hidden = (struct SDL_PrivateVideoData *)
96 				SDL_malloc((sizeof *device->hidden));
97 	}
98 	if ( (device == NULL) || (device->hidden == NULL) ) {
99 		SDL_OutOfMemory();
100 		if ( device ) {
101 			SDL_free(device);
102 		}
103 		return(0);
104 	}
105 	SDL_memset(device->hidden, 0, (sizeof *device->hidden));
106 
107 	/* Set the function pointers */
108 	device->VideoInit = PG_VideoInit;
109 	device->ListModes = PG_ListModes;
110 	device->SetVideoMode = PG_SetVideoMode;
111 	device->CreateYUVOverlay = NULL;
112 	device->SetColors = PG_SetColors;
113 	device->UpdateRects = PG_UpdateRects;
114 	device->VideoQuit = PG_VideoQuit;
115 	device->AllocHWSurface = PG_AllocHWSurface;
116 	device->CheckHWBlit = NULL;
117 	device->FillHWRect = NULL;
118 	device->SetHWColorKey = NULL;
119 	device->SetHWAlpha = NULL;
120 	device->LockHWSurface = PG_LockHWSurface;
121 	device->UnlockHWSurface = PG_UnlockHWSurface;
122 	device->FlipHWSurface = NULL;
123 	device->FreeHWSurface = PG_FreeHWSurface;
124 	device->SetCaption = PG_SetCaption;
125 	device->SetIcon = NULL;
126 	device->IconifyWindow = NULL;
127 	device->GrabInput = NULL;
128 
129 	device->PumpEvents = PG_PumpEvents;
130 	device->InitOSKeymap = PG_InitOSKeymap;
131 
132 	device->ShowWMCursor = PG_ShowWMCursor;
133 	device->CreateWMCursor = PG_CreateWMCursor;
134 	device->FreeWMCursor = PG_FreeWMCursor;
135 	device->WarpWMCursor = PG_WarpWMCursor;
136 
137 	device->free = PG_DeleteDevice;
138 
139 	return device;
140 }
141 
142 VideoBootStrap PG_bootstrap = {
143 	PGVID_DRIVER_NAME, "PicoGUI SDL driver",
144 	PG_Available, PG_CreateDevice
145 };
146 
147 
PG_VideoInit(_THIS,SDL_PixelFormat * vformat)148 int PG_VideoInit(_THIS, SDL_PixelFormat *vformat)
149 {
150         /* Connect to the PicoGUI server. No way to process command line args yet,
151 	 * but since this is based on SHM it's not important to be able to specify
152 	 * a remote PicoGUI server.
153 	 *
154 	 * FIXME: Another nitpick about the current client lib is there's no
155 	 *        clean way to indicate that command line args are not available.
156 	 */
157         pgInit(0,(char**)"");
158 	this->hidden->mi = *pgGetVideoMode();
159 
160 	/* Create a picogui application and canvas. We'll populate the canvas later. */
161 	this->hidden->wApp = pgRegisterApp(PG_APP_NORMAL,"SDL",0);
162 	this->hidden->wCanvas = pgNewWidget(PG_WIDGET_CANVAS,0,0);
163 	pgSetWidget(PGDEFAULT,
164 		    PG_WP_SIDE, PG_S_ALL,
165 		    0);
166 
167 	PG_InitEvents(this);
168 
169 	/* Determine the current screen size */
170 	this->info.current_w = this->hidden->mi.lxres;
171 	this->info.current_h = this->hidden->mi.lyres;
172 
173 	/* Determine the screen depth.
174 	 * We change this during the SDL_SetVideoMode implementation...
175 	 * Round up to the nearest Bytes per pixel
176 	 */
177 	vformat->BitsPerPixel = this->hidden->mi.bpp;
178 	vformat->BytesPerPixel = this->hidden->mi.bpp >> 3;
179 	if (this->hidden->mi.bpp & 7)
180 	  vformat->BytesPerPixel++;
181 
182 	/* We're done! */
183 	return(0);
184 }
185 
PG_ListModes(_THIS,SDL_PixelFormat * format,Uint32 flags)186 SDL_Rect **PG_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
187 {
188    	 return (SDL_Rect **) -1;
189 }
190 
PG_SetVideoMode(_THIS,SDL_Surface * current,int width,int height,int bpp,Uint32 flags)191 SDL_Surface *PG_SetVideoMode(_THIS, SDL_Surface *current,
192 				int width, int height, int bpp, Uint32 flags)
193 {
194 	if ( this->hidden->bitmap ) {
195 	  /* Free old bitmap */
196 	  if (current->pixels) {
197 	    shmdt(current->pixels);
198 	    current->pixels = NULL;
199 	  }
200 	  pgDelete(this->hidden->bitmap);
201 	}
202 
203 	/* Allocate the new pixel format for the screen */
204 	if ( ! SDL_ReallocFormat(current, bpp, 0, 0, 0, 0) ) {
205 		SDL_SetError("Couldn't allocate new pixel format for requested mode");
206 		return(NULL);
207 	}
208 
209 	/* Create a new picogui bitmap */
210 	this->hidden->bitmap = pgCreateBitmap(width,height);
211 	this->hidden->shm = *pgMakeSHMBitmap(this->hidden->bitmap);
212 	current->pixels = shmat(shmget(this->hidden->shm.shm_key,
213 				       this->hidden->shm.shm_length,0),NULL,0);
214 
215 	/* Reset the canvas, and draw persistent and incremental grops.
216 	 * Use mapping and offsets to center it.
217 	 */
218 
219 	pgWriteCmd(this->hidden->wCanvas, PGCANVAS_NUKE, 0);
220 
221 	/* 0. Set the source position during incremental rendering
222 	 */
223 	pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROP, 5, PG_GROP_SETSRC,0,0,0,0);
224 	pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROPFLAGS, 1, PG_GROPF_INCREMENTAL);
225 
226 	/* 1. Incremental bitmap rendering
227 	 */
228 	pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROP, 6, PG_GROP_BITMAP,
229 		   0,0,0,0,this->hidden->bitmap);
230 	pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROPFLAGS, 1, PG_GROPF_INCREMENTAL);
231 
232 	/* 2. Normal bitmap rendering
233 	 */
234 	pgWriteCmd(this->hidden->wCanvas, PGCANVAS_GROP, 6, PG_GROP_BITMAP,
235 		   0,0,this->hidden->shm.width,this->hidden->shm.height,this->hidden->bitmap);
236 
237 	/* Set up the new mode framebuffer */
238 	current->flags = 0;
239 	current->w = this->hidden->shm.width;
240 	current->h = this->hidden->shm.height;
241 	current->pitch = this->hidden->shm.pitch;
242 
243 	/* Set up pixel format */
244 	current->format->BitsPerPixel = this->hidden->shm.bpp;
245 	current->format->BytesPerPixel = this->hidden->shm.bpp >> 3;
246 	if (this->hidden->shm.bpp & 7)
247 	  current->format->BytesPerPixel++;
248 	current->format->palette = NULL;
249 	current->format->Rmask = this->hidden->shm.red_mask;
250 	current->format->Gmask = this->hidden->shm.green_mask;
251 	current->format->Bmask = this->hidden->shm.blue_mask;
252 	current->format->Amask = this->hidden->shm.alpha_mask;
253 	current->format->Rshift = this->hidden->shm.red_shift;
254 	current->format->Gshift = this->hidden->shm.green_shift;
255 	current->format->Bshift = this->hidden->shm.blue_shift;
256 	current->format->Ashift = this->hidden->shm.alpha_shift;
257 	current->format->Rloss = 8 - this->hidden->shm.red_length;
258 	current->format->Gloss = 8 - this->hidden->shm.green_length;
259 	current->format->Bloss = 8 - this->hidden->shm.blue_length;
260 	current->format->Aloss = 8 - this->hidden->shm.alpha_length;
261 
262 	/* Draw the app */
263 	pgUpdate();
264 
265 	/* We're done */
266 	return(current);
267 }
268 
269 /* We don't actually allow hardware surfaces other than the main one */
PG_AllocHWSurface(_THIS,SDL_Surface * surface)270 static int PG_AllocHWSurface(_THIS, SDL_Surface *surface)
271 {
272 	return(-1);
273 }
PG_FreeHWSurface(_THIS,SDL_Surface * surface)274 static void PG_FreeHWSurface(_THIS, SDL_Surface *surface)
275 {
276 	return;
277 }
278 
279 /* We need to wait for vertical retrace on page flipped displays */
PG_LockHWSurface(_THIS,SDL_Surface * surface)280 static int PG_LockHWSurface(_THIS, SDL_Surface *surface)
281 {
282 	return(0);
283 }
284 
PG_UnlockHWSurface(_THIS,SDL_Surface * surface)285 static void PG_UnlockHWSurface(_THIS, SDL_Surface *surface)
286 {
287 	return;
288 }
289 
PG_UpdateRects(_THIS,int numrects,SDL_Rect * rects)290 static void PG_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
291 {
292         int i;
293 
294 	for (i = 0; i < numrects; i++) {
295 	        if (rects[i].w <= 0 || rects[i].h <= 0)
296 		  continue;
297 
298 		/* Schedule an incremental update for this rectangle, using
299 		 * the canvas gropnodes we've loaded beforehand.
300 		 */
301 		pgWriteCmd(this->hidden->wCanvas, PGCANVAS_FINDGROP, 1, 0);
302 		pgWriteCmd(this->hidden->wCanvas, PGCANVAS_MOVEGROP, 4,
303 			   rects[i].x, rects[i].y,
304 			   rects[i].w, rects[i].h);
305 		pgWriteCmd(this->hidden->wCanvas, PGCANVAS_FINDGROP, 1, 1);
306 		pgWriteCmd(this->hidden->wCanvas, PGCANVAS_MOVEGROP, 4,
307 			   rects[i].x, rects[i].y,
308 			   rects[i].w, rects[i].h);
309 
310 		/* Go perform the update */
311 		pgWriteCmd(this->hidden->wCanvas, PGCANVAS_INCREMENTAL, 0);
312 		pgSubUpdate(this->hidden->wCanvas);
313 	}
314 }
315 
PG_SetColors(_THIS,int firstcolor,int ncolors,SDL_Color * colors)316 int PG_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
317 {
318 	/* do nothing of note. */
319 	return(1);
320 }
321 
322 /* Note:  If we are terminated, this could be called in the middle of
323    another SDL video routine -- notably UpdateRects.
324 */
PG_VideoQuit(_THIS)325 void PG_VideoQuit(_THIS)
326 {
327 	if (this->screen->pixels != NULL)
328 	{
329 		shmdt(this->screen->pixels);
330 		this->screen->pixels = NULL;
331 		pgDelete(this->hidden->bitmap);
332 	}
333 	pgDelete(this->hidden->wCanvas);
334 	pgDelete(this->hidden->wApp);
335 }
336 
PG_SetCaption(_THIS,const char * title,const char * icon)337 void PG_SetCaption(_THIS, const char *title, const char *icon)
338 {
339         if (title != NULL)
340 	  pgReplaceText(this->hidden->wApp, title);
341 	pgUpdate();
342 }
343 
344 /* FIXME: The cursor stuff isn't implemented yet! */
345 
PG_CreateWMCursor(_THIS,Uint8 * data,Uint8 * mask,int w,int h,int hot_x,int hot_y)346 WMcursor * PG_CreateWMCursor (_THIS,Uint8 * data, Uint8 * mask,
347 			      int w, int h, int hot_x, int hot_y)
348 {
349         static WMcursor dummy;
350         return &dummy;
351 }
352 
PG_FreeWMCursor(_THIS,WMcursor * cursor)353 void PG_FreeWMCursor (_THIS, WMcursor * cursor)
354 {
355 }
356 
PG_WarpWMCursor(_THIS,Uint16 x,Uint16 y)357 void PG_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
358 {
359 }
360 
PG_ShowWMCursor(_THIS,WMcursor * cursor)361 int PG_ShowWMCursor (_THIS, WMcursor * cursor)
362 {
363         return 1;
364 }
365