/* ______ ___ ___ * /\ _ \ /\_ \ /\_ \ * \ \ \L\ \\//\ \ \//\ \ __ __ _ __ ___ * \ \ __ \ \ \ \ \ \ \ /'__`\ /'_ `\/\`'__\/ __`\ * \ \ \/\ \ \_\ \_ \_\ \_/\ __//\ \L\ \ \ \//\ \L\ \ * \ \_\ \_\/\____\/\____\ \____\ \____ \ \_\\ \____/ * \/_/\/_/\/____/\/____/\/____/\/___L\ \/_/ \/___/ * /\____/ * \_/__/ * * Fullscreen BeOS gfx driver based on BScreen. * * By Jason Wilkins. * * See readme.txt for copyright information. */ #include "bealleg.h" #include "allegro/internal/aintern.h" #include "allegro/platform/aintbeos.h" #ifndef ALLEGRO_BEOS #error something is wrong with the makefile #endif static char driver_desc[256] = EMPTY_STRING; static thread_id palette_thread_id = -1; static sem_id palette_sem = -1; static rgb_color palette_colors[256]; /* BeAllegroScreen::BeAllegroScreen: * Constructor, switches gfx mode and initializes the screen. */ BeAllegroScreen::BeAllegroScreen(const char *title, uint32 space, status_t *error, bool debugging) : BWindowScreen(title, space, error, debugging) { } /* BeAllegroScreen::ScreenConnected: * Callback for when the user switches in or out of the workspace. */ void BeAllegroScreen::ScreenConnected(bool connected) { if(connected) { _be_change_focus(connected); release_sem(_be_fullscreen_lock); } else { acquire_sem(_be_fullscreen_lock); _be_change_focus(connected); } } /* BeAllegroScreen::QuitRequested: * User requested to close the program window. */ bool BeAllegroScreen::QuitRequested(void) { return _be_handle_window_close(Title()); } /* BeAllegroScreen::MessageReceived: * System messages handler. */ void BeAllegroScreen::MessageReceived(BMessage *message) { switch (message->what) { case B_SIMPLE_DATA: break; case B_MOUSE_WHEEL_CHANGED: float dy; message->FindFloat("be:wheel_delta_y", &dy); _be_mouse_z += ((int)dy > 0 ? -1 : 1); break; default: BWindowScreen::MessageReceived(message); break; } } /* find_gfx_mode: * Searches given mode and returns the corresponding entry in the modes * table. Returns -1 if mode is unavailable. */ static inline uint32 find_gfx_mode(int w, int h, int d) { int index = 0; while (_be_mode_table[index].d > 0) { if ((_be_mode_table[index].w == w) && (_be_mode_table[index].h == h) && (_be_mode_table[index].d == d)) return _be_mode_table[index].mode; index++; } return (uint32)-1; } /* be_sort_out_virtual_resolution: * Computes and initializes framebuffer layout for given virtual * resolution. */ static inline bool be_sort_out_virtual_resolution(int w, int h, int *v_w, int *v_h, int color_depth) { int32 try_v_w; int32 try_v_h; // Possible VRAM amounts. Are these always powers of 2? int ram_count[] = { 256, 128, 64, 32, 16, 8, 4, 2, 1, 0 }; int i; if (*v_w == 0) try_v_w = MIN(w, 32767); else try_v_w = MIN(*v_w, 32767); try_v_h = *v_h; if (*v_h == 0) { for (i = 0; ram_count[i]; i++) { try_v_h = (1024 * 1024 * ram_count[i]) / (try_v_w * BYTES_PER_PIXEL(color_depth)); /* Evil hack: under BeOS R5 SetFrameBuffer() should work with any * int32 width and height parameters, but actually it crashes if * one of them exceeds the boundaries of a signed short variable. */ try_v_h = MIN(try_v_h, 32767); if (_be_allegro_screen->SetFrameBuffer(try_v_w, try_v_h) == B_OK) { *v_w = try_v_w; *v_h = try_v_h; return true; } } try_v_h = h; } if (_be_allegro_screen->SetFrameBuffer(try_v_w, try_v_h) == B_OK) { *v_w = try_v_w; *v_h = try_v_h; return true; } else { return false; } } /* palette_updater_thread: * This small thread is used to update the palette in fullscreen mode. It may seem * unnecessary as a direct call to SetColorList would do it, but calling directly * this function from the main thread has proven to be a major bottleneck, so * calling it from a separated thread is a good thing. */ static int32 palette_updater_thread(void *data) { BeAllegroScreen *s = (BeAllegroScreen *)data; while (_be_gfx_initialized) { acquire_sem(palette_sem); s->SetColorList(palette_colors, 0, 255); } return B_OK; } /* be_gfx_bwindowscreen_fetch_mode_list: * Builds the list of available video modes. */ extern "C" struct GFX_MODE_LIST *be_gfx_bwindowscreen_fetch_mode_list(void) { int j, be_mode, num_modes = 0; uint32 i, count; display_mode *mode; GFX_MODE_LIST *mode_list; bool already_there; if (BScreen().GetModeList(&mode, &count) != B_OK) return NULL; mode_list = (GFX_MODE_LIST *)malloc(sizeof(GFX_MODE_LIST)); if (!mode_list) { free(mode); return NULL; } mode_list->mode = NULL; for (i=0; i 0) { if ((mode[i].virtual_width == _be_mode_table[be_mode].w) && (mode[i].virtual_height == _be_mode_table[be_mode].h) && (mode[i].space == _be_mode_table[be_mode].space)) break; be_mode++; } if (_be_mode_table[be_mode].d == -1) continue; already_there = false; for (j=0; jmode[j].width == _be_mode_table[be_mode].w) && (mode_list->mode[j].height == _be_mode_table[be_mode].h) && (mode_list->mode[j].bpp == _be_mode_table[be_mode].d)) { already_there = true; break; } } if (!already_there) { mode_list->mode = (GFX_MODE *)realloc(mode_list->mode, sizeof(GFX_MODE) * (num_modes + 1)); if (!mode_list->mode) { free(mode); return NULL; } mode_list->mode[num_modes].width = _be_mode_table[be_mode].w; mode_list->mode[num_modes].height = _be_mode_table[be_mode].h; mode_list->mode[num_modes].bpp = _be_mode_table[be_mode].d; num_modes++; } } mode_list->mode = (GFX_MODE *)realloc(mode_list->mode, sizeof(GFX_MODE) * (num_modes + 1)); if (!mode_list->mode) { free(mode); return NULL; } mode_list->mode[num_modes].width = 0; mode_list->mode[num_modes].height = 0; mode_list->mode[num_modes].bpp = 0; mode_list->num_modes = num_modes; free(mode); return mode_list; } /* _be_gfx_bwindowscreen_init: * Initializes the driver for given gfx mode. */ static struct BITMAP *_be_gfx_bwindowscreen_init(GFX_DRIVER *drv, int w, int h, int v_w, int v_h, int color_depth, bool accel) { BITMAP *bmp; status_t error; uint32 mode; graphics_card_info *gfx_card; frame_buffer_info *fbuffer; accelerant_device_info info; char tmp1[128], tmp2[128]; if (1 #ifdef ALLEGRO_COLOR8 && (color_depth != 8) #endif #ifdef ALLEGRO_COLOR16 && (color_depth != 15) && (color_depth != 16) #endif #ifdef ALLEGRO_COLOR24 && (color_depth != 24) #endif #ifdef ALLEGRO_COLOR32 && (color_depth != 32) #endif ) { ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Unsupported color depth")); return NULL; } if ((w == 0) && (h == 0)) { w = 640; h = 480; } mode = find_gfx_mode(w, h, color_depth); if (mode == (uint32)-1) { goto cleanup; } _be_fullscreen_lock = create_sem(0, "screen lock"); if (_be_fullscreen_lock < 0) { goto cleanup; } _be_lock_count = 0; set_display_switch_mode(SWITCH_AMNESIA); _be_allegro_screen = new BeAllegroScreen(wnd_title, mode, &error, false); _be_window = _be_allegro_screen; if(error != B_OK) { ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Resolution not supported")); goto cleanup; } _be_mouse_view = new BView(_be_allegro_screen->Bounds(), "allegro mouse view", B_FOLLOW_ALL_SIDES, 0); _be_allegro_screen->Lock(); _be_allegro_screen->AddChild(_be_mouse_view); _be_allegro_screen->Unlock(); _be_mouse_window = _be_allegro_screen; _be_mouse_window_mode = false; _mouse_on = TRUE; release_sem(_be_mouse_view_attached); palette_sem = create_sem(0, "palette sem"); if (palette_sem < 0) { goto cleanup; } _be_gfx_initialized = false; _be_allegro_screen->Show(); acquire_sem(_be_fullscreen_lock); gfx_card = _be_allegro_screen->CardInfo(); if (!be_sort_out_virtual_resolution(w, h, &v_w, &v_h, color_depth)) { v_w = w; v_h = h; } /* BWindowScreen sets refresh rate at 60 Hz by default */ _set_current_refresh_rate(60); fbuffer = _be_allegro_screen->FrameBufferInfo(); drv->w = w; drv->h = h; drv->linear = TRUE; drv->vid_mem = v_w * v_h * BYTES_PER_PIXEL(color_depth); bmp = _make_bitmap(fbuffer->width, fbuffer->height, (unsigned long)gfx_card->frame_buffer, drv, color_depth, fbuffer->bytes_per_row); if (!bmp) { ustrzcpy(allegro_error, ALLEGRO_ERROR_SIZE, get_config_text("Not enough memory")); goto cleanup; } _be_sync_func = NULL; if (accel) { be_gfx_bwindowscreen_accelerate(color_depth); } #ifdef ALLEGRO_NO_ASM if (gfx_capabilities) { bmp->write_bank = be_gfx_bwindowscreen_read_write_bank; bmp->read_bank = be_gfx_bwindowscreen_read_write_bank; _screen_vtable.unwrite_bank = be_gfx_bwindowscreen_unwrite_bank; } #else if (gfx_capabilities) { bmp->write_bank = _be_gfx_bwindowscreen_read_write_bank_asm; bmp->read_bank = _be_gfx_bwindowscreen_read_write_bank_asm; _screen_vtable.unwrite_bank = _be_gfx_bwindowscreen_unwrite_bank_asm; } #endif gfx_capabilities |= GFX_CAN_TRIPLE_BUFFER; _screen_vtable.acquire = be_gfx_bwindowscreen_acquire; _screen_vtable.release = be_gfx_bwindowscreen_release; _be_gfx_set_truecolor_shifts(); if (BScreen().GetDeviceInfo(&info) == B_OK) uszprintf(driver_desc, sizeof(driver_desc), uconvert_ascii("BWindowScreen object (%s)", tmp1), uconvert_ascii(info.name, tmp2)); else ustrzcpy(driver_desc, sizeof(driver_desc), uconvert_ascii("BWindowScreen object", tmp1)); drv->desc = driver_desc; _be_gfx_initialized = true; palette_thread_id = spawn_thread(palette_updater_thread, "palette updater", B_DISPLAY_PRIORITY, (void *)_be_allegro_screen); resume_thread(palette_thread_id); be_app->HideCursor(); release_sem(_be_fullscreen_lock); while (!_be_focus_count); return bmp; cleanup: { be_gfx_bwindowscreen_exit(NULL); return NULL; } } extern "C" struct BITMAP *be_gfx_bwindowscreen_accel_init(int w, int h, int v_w, int v_h, int color_depth) { return _be_gfx_bwindowscreen_init(&gfx_beos_bwindowscreen_accel, w, h, v_w, v_h, color_depth, true); } extern "C" struct BITMAP *be_gfx_bwindowscreen_init(int w, int h, int v_w, int v_h, int color_depth) { return _be_gfx_bwindowscreen_init(&gfx_beos_bwindowscreen, w, h, v_w, v_h, color_depth, false); } /* be_gfx_bwindowscreen_exit: * Shuts down the driver. */ extern "C" void be_gfx_bwindowscreen_exit(struct BITMAP *bmp) { status_t ret_value; (void)bmp; if (_be_fullscreen_lock > 0) { delete_sem(_be_fullscreen_lock); _be_fullscreen_lock = -1; } _be_gfx_initialized = false; if (palette_thread_id >= 0) { release_sem(palette_sem); wait_for_thread(palette_thread_id, &ret_value); palette_thread_id = -1; } if (palette_sem >= 0) { delete_sem(palette_sem); palette_sem = -1; } if (_be_allegro_screen != NULL) { if (_be_mouse_view_attached < 1) { acquire_sem(_be_mouse_view_attached); } _be_allegro_screen->Lock(); _be_allegro_screen->Quit(); _be_allegro_screen = NULL; _be_window = NULL; } be_app->ShowCursor(); _be_mouse_window = NULL; _be_mouse_view = NULL; _be_focus_count = 0; _be_lock_count = 0; } #ifdef ALLEGRO_NO_ASM /* be_gfx_bwindowscreen_read_write_bank: * Returns new line and synchronizes framebuffer if needed. */ extern "C" unsigned long be_gfx_bwindowscreen_read_write_bank(BITMAP *bmp, int line) { if (!(bmp->id & BMP_ID_LOCKED)) { _be_sync_func(); bmp->id |= (BMP_ID_LOCKED | BMP_ID_AUTOLOCK); } return (unsigned long)(bmp->line[line]); } /* be_gfx_bwindowscreen_unwrite_bank: * Unlocks bitmap if necessary. */ extern "C" void be_gfx_bwindowscreen_unwrite_bank(BITMAP *bmp) { if (bmp->id & BMP_AUTOLOCK) { bmp->id &= ~(BMP_ID_LOCKED | BMP_ID_AUTOLOCK); } } #endif /* be_gfx_bwindowscreen_acquire: * Locks specified video bitmap. */ extern "C" void be_gfx_bwindowscreen_acquire(struct BITMAP *bmp) { if (_be_lock_count == 0) { acquire_sem(_be_fullscreen_lock); bmp->id |= BMP_ID_LOCKED; } if (_be_sync_func) _be_sync_func(); _be_lock_count++; } /* be_gfx_bwindowscreen_release: * Unlocks specified video bitmap. */ extern "C" void be_gfx_bwindowscreen_release(struct BITMAP *bmp) { _be_lock_count--; if (_be_lock_count == 0) { bmp->id &= ~BMP_ID_LOCKED; release_sem(_be_fullscreen_lock); } } /* be_gfx_bwindowscreen_set_palette: * Sets the palette colors and notices the palette updater thread * about the change. */ extern "C" void be_gfx_bwindowscreen_set_palette(AL_CONST struct RGB *p, int from, int to, int vsync) { if (vsync) be_gfx_vsync(); for(int index = from; index <= to; index++) { palette_colors[index].red = _rgb_scale_6[p[index].r]; palette_colors[index].green = _rgb_scale_6[p[index].g]; palette_colors[index].blue = _rgb_scale_6[p[index].b]; palette_colors[index].alpha = 255; } /* Update palette! */ release_sem(palette_sem); } /* be_gfx_bwindowscreen_scroll: * Scrolls the visible viewport. */ extern "C" int be_gfx_bwindowscreen_scroll(int x, int y) { int rv; acquire_screen(); if (_be_allegro_screen->MoveDisplayArea(x, y) != B_ERROR) { rv = 0; } else { rv = 1; } release_screen(); if (_wait_for_vsync) be_gfx_vsync(); return rv; } /* be_gfx_bwindowscreen_poll_scroll: * Returns true if there are pending scrolling requests left. */ extern "C" int be_gfx_bwindowscreen_poll_scroll(void) { return (BScreen(_be_allegro_screen).WaitForRetrace(0) == B_ERROR ? TRUE : FALSE); } /* be_gfx_bwindowscreen_request_scroll: * Starts a screen scroll but doesn't wait for the retrace. */ extern "C" int be_gfx_bwindowscreen_request_scroll(int x, int y) { acquire_screen(); _be_allegro_screen->MoveDisplayArea(x, y); release_screen(); return 0; } /* be_gfx_bwindowscreen_request_video_bitmap: * Page flips to display specified bitmap, but doesn't wait for retrace. */ extern "C" int be_gfx_bwindowscreen_request_video_bitmap(struct BITMAP *bmp) { int rv; acquire_screen(); rv = _be_allegro_screen->MoveDisplayArea(bmp->x_ofs, bmp->y_ofs) == B_ERROR ? 1 : 0; release_screen(); return rv; }