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comparison src/video/dc/SDL_dcvideo.c @ 509:dad72daf44b3

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Added initial support for Dreamcast (thanks HERO!)
author Sam Lantinga <slouken@libsdl.org>
date Sat, 05 Oct 2002 16:50:56 +0000
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children b8d311d90021
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508:9ff7e90aaa94 509:dad72daf44b3
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 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 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 BERO
20 bero@geocities.co.jp
21
22 based on SDL_nullvideo.c by
23
24 Sam Lantinga
25 slouken@libsdl.org
26 */
27
28 #ifdef SAVE_RCSID
29 static char rcsid =
30 "@(#) $Id$";
31 #endif
32
33 /* Dummy SDL video driver implementation; this is just enough to make an
34 * SDL-based application THINK it's got a working video driver, for
35 * applications that call SDL_Init(SDL_INIT_VIDEO) when they don't need it,
36 * and also for use as a collection of stubs when porting SDL to a new
37 * platform for which you haven't yet written a valid video driver.
38 *
39 * This is also a great way to determine bottlenecks: if you think that SDL
40 * is a performance problem for a given platform, enable this driver, and
41 * then see if your application runs faster without video overhead.
42 *
43 * Initial work by Ryan C. Gordon (icculus@linuxgames.com). A good portion
44 * of this was cut-and-pasted from Stephane Peter's work in the AAlib
45 * SDL video driver. Renamed to "DC" by Sam Lantinga.
46 */
47
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <string.h>
51
52 #include "SDL.h"
53 #include "SDL_error.h"
54 #include "SDL_video.h"
55 #include "SDL_mouse.h"
56 #include "SDL_sysvideo.h"
57 #include "SDL_pixels_c.h"
58 #include "SDL_events_c.h"
59
60 #include "SDL_dcvideo.h"
61 #include "SDL_dcevents_c.h"
62 #include "SDL_dcmouse_c.h"
63
64 #include <dc/video.h>
65 #include <dc/pvr.h>
66
67 #ifdef HAVE_OPENGL
68 #include <GL/gl.h>
69 #endif
70
71
72 /* Initialization/Query functions */
73 static int DC_VideoInit(_THIS, SDL_PixelFormat *vformat);
74 static SDL_Rect **DC_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
75 static SDL_Surface *DC_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
76 static int DC_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
77 static void DC_VideoQuit(_THIS);
78
79 /* Hardware surface functions */
80 static int DC_AllocHWSurface(_THIS, SDL_Surface *surface);
81 static int DC_LockHWSurface(_THIS, SDL_Surface *surface);
82 static void DC_UnlockHWSurface(_THIS, SDL_Surface *surface);
83 static void DC_FreeHWSurface(_THIS, SDL_Surface *surface);
84 static int DC_FlipHWSurface(_THIS, SDL_Surface *surface);
85
86 /* etc. */
87 static void DC_UpdateRects(_THIS, int numrects, SDL_Rect *rects);
88
89 /* OpenGL */
90 static void *DC_GL_GetProcAddress(_THIS, const char *proc);
91 static int DC_GL_LoadLibrary(_THIS, const char *path);
92 static int DC_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);
93 static void DC_GL_SwapBuffers(_THIS);
94
95 /* DC driver bootstrap functions */
96
97 static int DC_Available(void)
98 {
99 return 1;
100 }
101
102 static void DC_DeleteDevice(SDL_VideoDevice *device)
103 {
104 free(device->hidden);
105 free(device);
106 }
107
108 static SDL_VideoDevice *DC_CreateDevice(int devindex)
109 {
110 SDL_VideoDevice *device;
111
112 /* Initialize all variables that we clean on shutdown */
113 device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
114 if ( device ) {
115 memset(device, 0, (sizeof *device));
116 device->hidden = (struct SDL_PrivateVideoData *)
117 malloc((sizeof *device->hidden));
118 }
119 if ( (device == NULL) || (device->hidden == NULL) ) {
120 SDL_OutOfMemory();
121 if ( device ) {
122 free(device);
123 }
124 return(0);
125 }
126 memset(device->hidden, 0, (sizeof *device->hidden));
127
128 /* Set the function pointers */
129 device->VideoInit = DC_VideoInit;
130 device->ListModes = DC_ListModes;
131 device->SetVideoMode = DC_SetVideoMode;
132 device->CreateYUVOverlay = NULL;
133 device->SetColors = DC_SetColors;
134 device->UpdateRects = DC_UpdateRects;
135 device->VideoQuit = DC_VideoQuit;
136 device->AllocHWSurface = DC_AllocHWSurface;
137 device->CheckHWBlit = NULL;
138 device->FillHWRect = NULL;
139 device->SetHWColorKey = NULL;
140 device->SetHWAlpha = NULL;
141 device->LockHWSurface = DC_LockHWSurface;
142 device->UnlockHWSurface = DC_UnlockHWSurface;
143 device->FlipHWSurface = DC_FlipHWSurface;
144 device->FreeHWSurface = DC_FreeHWSurface;
145 #ifdef HAVE_OPENGL
146 device->GL_LoadLibrary = DC_GL_LoadLibrary;
147 device->GL_GetProcAddress = DC_GL_GetProcAddress;
148 device->GL_GetAttribute = DC_GL_GetAttribute;
149 device->GL_MakeCurrent = NULL;
150 device->GL_SwapBuffers = DC_GL_SwapBuffers;
151 #endif
152 device->SetCaption = NULL;
153 device->SetIcon = NULL;
154 device->IconifyWindow = NULL;
155 device->GrabInput = NULL;
156 device->GetWMInfo = NULL;
157 device->InitOSKeymap = DC_InitOSKeymap;
158 device->PumpEvents = DC_PumpEvents;
159
160 device->free = DC_DeleteDevice;
161
162 return device;
163 }
164
165 VideoBootStrap DC_bootstrap = {
166 "dcvideo", "Dreamcast Video",
167 DC_Available, DC_CreateDevice
168 };
169
170
171 int DC_VideoInit(_THIS, SDL_PixelFormat *vformat)
172 {
173 /* Determine the screen depth (use default 8-bit depth) */
174 /* we change this during the SDL_SetVideoMode implementation... */
175 vformat->BitsPerPixel = 16;
176 vformat->Rmask = 0x0000f800;
177 vformat->Gmask = 0x000007e0;
178 vformat->Bmask = 0x0000001f;
179
180 /* We're done! */
181 return(0);
182 }
183
184 const static SDL_Rect
185 RECT_800x600 = {0,0,800,600},
186 RECT_640x480 = {0,0,640,480},
187 RECT_320x240 = {0,0,320,240};
188 const static SDL_Rect *vid_modes[] = {
189 &RECT_800x600,
190 &RECT_640x480,
191 &RECT_320x240,
192 NULL
193 };
194
195 SDL_Rect **DC_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
196 {
197 switch(format->BitsPerPixel) {
198 case 15:
199 case 16:
200 return &vid_modes;
201 case 32:
202 if (!(flags & SDL_OPENGL))
203 return &vid_modes;
204 default:
205 return NULL;
206 }
207 // return (SDL_Rect **) -1;
208 }
209
210 pvr_init_params_t params = {
211 /* Enable opaque and translucent polygons with size 16 */
212 { PVR_BINSIZE_16, PVR_BINSIZE_0, PVR_BINSIZE_16, PVR_BINSIZE_0, PVR_BINSIZE_16 },
213
214 /* Vertex buffer size */
215 512*1024
216 };
217
218 #ifdef HAVE_OPENGL
219 static int pvr_inited;
220 #endif
221
222 SDL_Surface *DC_SetVideoMode(_THIS, SDL_Surface *current,
223 int width, int height, int bpp, Uint32 flags)
224 {
225 int disp_mode,pixel_mode,pitch;
226 Uint32 Rmask, Gmask, Bmask;
227
228 if (width==320 && height==240) disp_mode=DM_320x240;
229 else if (width==640 && height==480) disp_mode=DM_640x480;
230 else if (width==800 && height==600) disp_mode=DM_800x608;
231 else {
232 SDL_SetError("Couldn't find requested mode in list");
233 return(NULL);
234 }
235
236 switch(bpp) {
237 case 15: pixel_mode = PM_RGB555; pitch = width*2;
238 /* 5-5-5 */
239 Rmask = 0x00007c00;
240 Gmask = 0x000003e0;
241 Bmask = 0x0000001f;
242 break;
243 case 16: pixel_mode = PM_RGB565; pitch = width*2;
244 /* 5-6-5 */
245 Rmask = 0x0000f800;
246 Gmask = 0x000007e0;
247 Bmask = 0x0000001f;
248 break;
249 case 24: bpp = 32;
250 case 32: pixel_mode = PM_RGB888; pitch = width*4;
251 Rmask = 0x00ff0000;
252 Gmask = 0x0000ff00;
253 Bmask = 0x000000ff;
254 #ifdef HAVE_OPENGL
255 if (!(flags & SDL_OPENGL))
256 #endif
257 break;
258 default:
259 SDL_SetError("Couldn't find requested mode in list");
260 return(NULL);
261 }
262
263 // if ( bpp != current->format->BitsPerPixel ) {
264 if ( ! SDL_ReallocFormat(current, bpp, Rmask, Gmask, Bmask, 0) ) {
265 return(NULL);
266 }
267 // }
268
269 /* Set up the new mode framebuffer */
270 current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE);
271 current->w = width;
272 current->h = height;
273 current->pitch = pitch;
274
275 #ifdef HAVE_OPENGL
276 if (pvr_inited) {
277 pvr_inited = 0;
278 pvr_shutdown();
279 }
280 #endif
281
282 vid_set_mode(disp_mode,pixel_mode);
283
284 current->pixels = vram_s;
285
286 #ifdef HAVE_OPENGL
287 if (flags & SDL_OPENGL) {
288 this->gl_config.driver_loaded = 1;
289 current->flags = SDL_FULLSCREEN | SDL_OPENGL;
290 current->pixels = NULL;
291 pvr_inited = 1;
292 pvr_init(&params);
293 glKosInit();
294 glKosBeginFrame();
295 } else
296 #endif
297 if (flags | SDL_DOUBLEBUF) {
298 current->flags |= SDL_DOUBLEBUF;
299 current->pixels = (void*)((int)current->pixels | 0x400000);
300 }
301
302 /* We're done */
303 return(current);
304 }
305
306 /* We don't actually allow hardware surfaces other than the main one */
307 static int DC_AllocHWSurface(_THIS, SDL_Surface *surface)
308 {
309 return(-1);
310 }
311 static void DC_FreeHWSurface(_THIS, SDL_Surface *surface)
312 {
313 return;
314 }
315
316 /* We need to wait for vertical retrace on page flipped displays */
317 static int DC_LockHWSurface(_THIS, SDL_Surface *surface)
318 {
319 return(0);
320 }
321
322 static void DC_UnlockHWSurface(_THIS, SDL_Surface *surface)
323 {
324 return;
325 }
326
327 static int DC_FlipHWSurface(_THIS, SDL_Surface *surface)
328 {
329 if (surface->flags & SDL_DOUBLEBUF) {
330 vid_set_start((int)surface->pixels & 0xffffff);
331 surface->pixels = (void*)((int)surface->pixels ^ 0x400000);
332 }
333 return(0);
334 }
335
336 static void DC_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
337 {
338 /* do nothing. */
339 }
340
341 static int DC_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
342 {
343 /* do nothing of note. */
344 return(1);
345 }
346
347 /* Note: If we are terminated, this could be called in the middle of
348 another SDL video routine -- notably UpdateRects.
349 */
350 static void DC_VideoQuit(_THIS)
351 {
352 #ifdef HAVE_OPENGL
353 if (pvr_inited) {
354 pvr_inited = 0;
355 pvr_shutdown();
356 }
357 #endif
358 }
359
360 #ifdef HAVE_OPENGL
361
362 void dmyfunc(void) {}
363
364 typedef void (*funcptr)();
365 const static struct {
366 char *name;
367 funcptr addr;
368 } glfuncs[] = {
369 #define DEF(func) {#func,&func}
370 DEF(glBegin),
371 DEF(glBindTexture),
372 DEF(glBlendFunc),
373 DEF(glColor4f),
374 // DEF(glCopyImageID),
375 DEF(glDisable),
376 DEF(glEnable),
377 DEF(glEnd),
378 DEF(glFlush),
379 DEF(glGenTextures),
380 DEF(glGetString),
381 DEF(glLoadIdentity),
382 DEF(glMatrixMode),
383 DEF(glOrtho),
384 DEF(glPixelStorei),
385 // DEF(glPopAttrib),
386 // DEF(glPopClientAttrib),
387 {"glPopAttrib",&dmyfunc},
388 {"glPopClientAttrib",&dmyfunc},
389 DEF(glPopMatrix),
390 // DEF(glPushAttrib),
391 // DEF(glPushClientAttrib),
392 {"glPushAttrib",&dmyfunc},
393 {"glPushClientAttrib",&dmyfunc},
394 DEF(glPushMatrix),
395 DEF(glTexCoord2f),
396 DEF(glTexEnvf),
397 DEF(glTexImage2D),
398 DEF(glTexParameteri),
399 DEF(glTexSubImage2D),
400 DEF(glVertex2i),
401 DEF(glViewport),
402 #undef DEF
403 };
404
405 static void *DC_GL_GetProcAddress(_THIS, const char *proc)
406 {
407 void *ret;
408 int i;
409
410 ret = glKosGetProcAddress(proc);
411 if (ret) return ret;
412
413 for(i=0;i<sizeof(glfuncs)/sizeof(glfuncs[0]);i++) {
414 if (strcmp(proc,glfuncs[i].name)==0) return glfuncs[i].addr;
415 }
416
417 return NULL;
418 }
419
420 static int DC_GL_LoadLibrary(_THIS, const char *path)
421 {
422 this->gl_config.driver_loaded = 1;
423
424 return 0;
425 }
426
427 static int DC_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
428 {
429 GLenum mesa_attrib;
430 int val;
431
432 switch(attrib) {
433 case SDL_GL_RED_SIZE:
434 val = 5;
435 break;
436 case SDL_GL_GREEN_SIZE:
437 val = 6;
438 break;
439 case SDL_GL_BLUE_SIZE:
440 val = 5;
441 break;
442 case SDL_GL_ALPHA_SIZE:
443 val = 0;
444 break;
445 case SDL_GL_DOUBLEBUFFER:
446 val = 1;
447 break;
448 case SDL_GL_DEPTH_SIZE:
449 val = 16; /* or 32? */
450 break;
451 case SDL_GL_STENCIL_SIZE:
452 val = 0;
453 break;
454 case SDL_GL_ACCUM_RED_SIZE:
455 val = 0;
456 break;
457 case SDL_GL_ACCUM_GREEN_SIZE:
458 val = 0;
459 case SDL_GL_ACCUM_BLUE_SIZE:
460 val = 0;
461 break;
462 case SDL_GL_ACCUM_ALPHA_SIZE:
463 val = 0;
464 break;
465 default :
466 return -1;
467 }
468 *value = val;
469 return 0;
470 }
471
472 static void DC_GL_SwapBuffers(_THIS)
473 {
474 glKosFinishFrame();
475 glKosBeginFrame();
476 }
477 #endif