X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=blobdiff_plain;f=src%2Flibgame%2Fsdl.c;h=ab3ac82d20e80fa80ebb2f1ea29ad41f790a2da0;hp=e732b11107913b0468d85476ec387d00b648b998;hb=852a8eef1e8858a40da0be4093eba3deaf468f51;hpb=222cd4187e6632bd904a937f167a2f1c70b8f66d diff --git a/src/libgame/sdl.c b/src/libgame/sdl.c index e732b111..ab3ac82d 100644 --- a/src/libgame/sdl.c +++ b/src/libgame/sdl.c @@ -1,37 +1,212 @@ /*********************************************************** -* Rocks'n'Diamonds -- McDuffin Strikes Back! * +* Artsoft Retro-Game Library * *----------------------------------------------------------* -* ©1995 Artsoft Development * -* Holger Schemel * -* 33659 Bielefeld-Senne * -* Telefon: (0521) 493245 * -* eMail: aeglos@valinor.owl.de * -* aeglos@uni-paderborn.de * -* q99492@pbhrzx.uni-paderborn.de * +* (c) 1994-2006 Artsoft Entertainment * +* Holger Schemel * +* Detmolder Strasse 189 * +* 33604 Bielefeld * +* Germany * +* e-mail: info@artsoft.org * *----------------------------------------------------------* -* sdl.c * +* sdl.c * ***********************************************************/ -#include "libgame.h" +#include "system.h" +#include "sound.h" +#include "joystick.h" +#include "misc.h" +#include "setup.h" -#ifdef TARGET_SDL -inline void SDLInitVideoDisplay(void) +#if defined(TARGET_SDL) + +/* ========================================================================= */ +/* video functions */ +/* ========================================================================= */ + +/* functions from SGE library */ +void sge_Line(SDL_Surface *, Sint16, Sint16, Sint16, Sint16, Uint32); + +/* stuff needed to work around SDL/Windows fullscreen drawing bug */ +static int fullscreen_width; +static int fullscreen_height; +static int fullscreen_xoffset; +static int fullscreen_yoffset; +static int video_xoffset; +static int video_yoffset; + +static void setFullscreenParameters(char *fullscreen_mode_string) +{ + struct ScreenModeInfo *fullscreen_mode; + int i; + + fullscreen_mode = get_screen_mode_from_string(fullscreen_mode_string); + + if (fullscreen_mode == NULL) + return; + + for (i = 0; video.fullscreen_modes[i].width != -1; i++) + { + if (fullscreen_mode->width == video.fullscreen_modes[i].width && + fullscreen_mode->height == video.fullscreen_modes[i].height) + { + fullscreen_width = fullscreen_mode->width; + fullscreen_height = fullscreen_mode->height; + + fullscreen_xoffset = (fullscreen_width - video.width) / 2; + fullscreen_yoffset = (fullscreen_height - video.height) / 2; + + break; + } + } +} + +static void SDLSetWindowIcon(char *basename) { + /* (setting the window icon on Mac OS X would replace the high-quality + dock icon with the currently smaller (and uglier) icon from file) */ + +#if !defined(PLATFORM_MACOSX) + char *filename = getCustomImageFilename(basename); + SDL_Surface *surface; + + if (filename == NULL) + { + Error(ERR_WARN, "SDLSetWindowIcon(): cannot find file '%s'", basename); + + return; + } + + if ((surface = IMG_Load(filename)) == NULL) + { + Error(ERR_WARN, "IMG_Load() failed: %s", SDL_GetError()); + + return; + } + + /* set transparent color */ + SDL_SetColorKey(surface, SDL_SRCCOLORKEY, + SDL_MapRGB(surface->format, 0x00, 0x00, 0x00)); + + SDL_WM_SetIcon(surface, NULL); +#endif +} + +void SDLInitVideoDisplay(void) +{ + if (!strEqual(setup.system.sdl_videodriver, ARG_DEFAULT)) + SDL_putenv(getStringCat2("SDL_VIDEODRIVER=", setup.system.sdl_videodriver)); + + SDL_putenv("SDL_VIDEO_CENTERED=1"); + /* initialize SDL video */ - if (SDL_Init(SDL_INIT_VIDEO) < 0) - Error(ERR_EXIT, "SDL_Init() failed: %s", SDL_GetError()); + if (SDL_InitSubSystem(SDL_INIT_VIDEO) < 0) + Error(ERR_EXIT, "SDL_InitSubSystem() failed: %s", SDL_GetError()); /* set default SDL depth */ video.default_depth = SDL_GetVideoInfo()->vfmt->BitsPerPixel; - - /* set exit function to automatically cleanup SDL stuff after exit() */ - atexit(SDL_Quit); } -inline void SDLInitVideoBuffer(DrawBuffer *backbuffer, DrawWindow *window, - boolean fullscreen) +void SDLInitVideoBuffer(DrawBuffer **backbuffer, DrawWindow **window, + boolean fullscreen) { + static int screen_xy[][2] = + { + { 640, 480 }, + { 800, 600 }, + { 1024, 768 }, + { -1, -1 } + }; + SDL_Rect **modes; + int i, j; + + /* default: normal game window size */ + fullscreen_width = video.width; + fullscreen_height = video.height; + fullscreen_xoffset = 0; + fullscreen_yoffset = 0; + + for (i = 0; screen_xy[i][0] != -1; i++) + { + if (screen_xy[i][0] >= video.width && screen_xy[i][1] >= video.height) + { + fullscreen_width = screen_xy[i][0]; + fullscreen_height = screen_xy[i][1]; + + break; + } + } + + fullscreen_xoffset = (fullscreen_width - video.width) / 2; + fullscreen_yoffset = (fullscreen_height - video.height) / 2; + + /* get available hardware supported fullscreen modes */ + modes = SDL_ListModes(NULL, SDL_FULLSCREEN | SDL_HWSURFACE); + + if (modes == NULL) + { + /* no screen modes available => no fullscreen mode support */ + video.fullscreen_available = FALSE; + } + else if (modes == (SDL_Rect **)-1) + { + /* fullscreen resolution is not restricted -- all resolutions available */ + video.fullscreen_modes = checked_calloc(2 * sizeof(struct ScreenModeInfo)); + + /* use native video buffer size for fullscreen mode */ + video.fullscreen_modes[0].width = video.width; + video.fullscreen_modes[0].height = video.height; + + video.fullscreen_modes[1].width = -1; + video.fullscreen_modes[1].height = -1; + } + else + { + /* in this case, a certain number of screen modes is available */ + int num_modes = 0; + + for(i = 0; modes[i] != NULL; i++) + { + boolean found_mode = FALSE; + + /* screen mode is smaller than video buffer size -- skip it */ + if (modes[i]->w < video.width || modes[i]->h < video.height) + continue; + + if (video.fullscreen_modes != NULL) + for (j = 0; video.fullscreen_modes[j].width != -1; j++) + if (modes[i]->w == video.fullscreen_modes[j].width && + modes[i]->h == video.fullscreen_modes[j].height) + found_mode = TRUE; + + if (found_mode) /* screen mode already stored -- skip it */ + continue; + + /* new mode found; add it to list of available fullscreen modes */ + + num_modes++; + + video.fullscreen_modes = checked_realloc(video.fullscreen_modes, + (num_modes + 1) * + sizeof(struct ScreenModeInfo)); + + video.fullscreen_modes[num_modes - 1].width = modes[i]->w; + video.fullscreen_modes[num_modes - 1].height = modes[i]->h; + + video.fullscreen_modes[num_modes].width = -1; + video.fullscreen_modes[num_modes].height = -1; + } + + if (num_modes == 0) + { + /* no appropriate screen modes available => no fullscreen mode support */ + video.fullscreen_available = FALSE; + } + } + + /* set window icon */ + SDLSetWindowIcon(program.sdl_icon_filename); + /* open SDL video output device (window or fullscreen mode) */ if (!SDLSetVideoMode(backbuffer, fullscreen)) Error(ERR_EXIT, "setting video mode failed"); @@ -56,46 +231,56 @@ inline void SDLInitVideoBuffer(DrawBuffer *backbuffer, DrawWindow *window, *window = CreateBitmap(video.width, video.height, video.depth); } -inline boolean SDLSetVideoMode(DrawBuffer *backbuffer, boolean fullscreen) +boolean SDLSetVideoMode(DrawBuffer **backbuffer, boolean fullscreen) { boolean success = TRUE; - int surface_flags = SDL_HWSURFACE | (fullscreen ? SDL_FULLSCREEN : 0); + int surface_flags_fullscreen = SURFACE_FLAGS | SDL_FULLSCREEN; + int surface_flags_window = SURFACE_FLAGS; + SDL_Surface *new_surface = NULL; + + if (*backbuffer == NULL) + *backbuffer = CreateBitmapStruct(); if (fullscreen && !video.fullscreen_enabled && video.fullscreen_available) { - /* switch display to fullscreen mode, if available */ - DrawWindow window_old = *backbuffer; - DrawWindow window_new; + setFullscreenParameters(setup.fullscreen_mode); + + video_xoffset = fullscreen_xoffset; + video_yoffset = fullscreen_yoffset; - if ((window_new = SDL_SetVideoMode(video.width, video.height, video.depth, - surface_flags)) == NULL) + /* switch display to fullscreen mode, if available */ + if ((new_surface = SDL_SetVideoMode(fullscreen_width, fullscreen_height, + video.depth, surface_flags_fullscreen)) + == NULL) { /* switching display to fullscreen mode failed */ Error(ERR_WARN, "SDL_SetVideoMode() failed: %s", SDL_GetError()); /* do not try it again */ video.fullscreen_available = FALSE; + success = FALSE; } else { - if (window_old) - SDL_FreeSurface(window_old); - *backbuffer = window_new; + (*backbuffer)->surface = new_surface; video.fullscreen_enabled = TRUE; + video.fullscreen_mode_current = setup.fullscreen_mode; + success = TRUE; } } - if ((!fullscreen && video.fullscreen_enabled) || !*backbuffer) + if ((!fullscreen && video.fullscreen_enabled) || new_surface == NULL) { - /* switch display to window mode */ - DrawWindow window_old = *backbuffer; - DrawWindow window_new; + video_xoffset = 0; + video_yoffset = 0; - if ((window_new = SDL_SetVideoMode(video.width, video.height, video.depth, - surface_flags)) == NULL) + /* switch display to window mode */ + if ((new_surface = SDL_SetVideoMode(video.width, video.height, + video.depth, surface_flags_window)) + == NULL) { /* switching display to window mode failed -- should not happen */ Error(ERR_WARN, "SDL_SetVideoMode() failed: %s", SDL_GetError()); @@ -104,9 +289,7 @@ inline boolean SDLSetVideoMode(DrawBuffer *backbuffer, boolean fullscreen) } else { - if (window_old) - SDL_FreeSurface(window_old); - *backbuffer = window_new; + (*backbuffer)->surface = new_surface; video.fullscreen_enabled = FALSE; success = TRUE; @@ -116,59 +299,352 @@ inline boolean SDLSetVideoMode(DrawBuffer *backbuffer, boolean fullscreen) return success; } -inline void SDLCopyArea(SDL_Surface *src_surface, SDL_Surface *dst_surface, - int src_x, int src_y, - int width, int height, - int dst_x, int dst_y) +void SDLCreateBitmapContent(Bitmap *new_bitmap, int width, int height, + int depth) +{ + SDL_Surface *surface_tmp, *surface_native; + + if ((surface_tmp = SDL_CreateRGBSurface(SURFACE_FLAGS, width, height, depth, + 0, 0, 0, 0)) + == NULL) + Error(ERR_EXIT, "SDL_CreateRGBSurface() failed: %s", SDL_GetError()); + + if ((surface_native = SDL_DisplayFormat(surface_tmp)) == NULL) + Error(ERR_EXIT, "SDL_DisplayFormat() failed: %s", SDL_GetError()); + + SDL_FreeSurface(surface_tmp); + + new_bitmap->surface = surface_native; +} + +void SDLFreeBitmapPointers(Bitmap *bitmap) { - SDL_Surface *surface = (dst_surface == window ? backbuffer : dst_surface); + if (bitmap->surface) + SDL_FreeSurface(bitmap->surface); + if (bitmap->surface_masked) + SDL_FreeSurface(bitmap->surface_masked); + bitmap->surface = NULL; + bitmap->surface_masked = NULL; +} + +void SDLCopyArea(Bitmap *src_bitmap, Bitmap *dst_bitmap, + int src_x, int src_y, int width, int height, + int dst_x, int dst_y, int mask_mode) +{ + Bitmap *real_dst_bitmap = (dst_bitmap == window ? backbuffer : dst_bitmap); SDL_Rect src_rect, dst_rect; + if (src_bitmap == backbuffer) + { + src_x += video_xoffset; + src_y += video_yoffset; + } + src_rect.x = src_x; src_rect.y = src_y; src_rect.w = width; src_rect.h = height; + if (dst_bitmap == backbuffer || dst_bitmap == window) + { + dst_x += video_xoffset; + dst_y += video_yoffset; + } + dst_rect.x = dst_x; dst_rect.y = dst_y; dst_rect.w = width; dst_rect.h = height; - if (src_surface != backbuffer || dst_surface != window) - SDL_BlitSurface(src_surface, &src_rect, surface, &dst_rect); + if (src_bitmap != backbuffer || dst_bitmap != window) + SDL_BlitSurface((mask_mode == BLIT_MASKED ? + src_bitmap->surface_masked : src_bitmap->surface), + &src_rect, real_dst_bitmap->surface, &dst_rect); - if (dst_surface == window) - SDL_UpdateRect(backbuffer, dst_x, dst_y, width, height); + if (dst_bitmap == window) + SDL_UpdateRect(backbuffer->surface, dst_x, dst_y, width, height); } -inline void SDLFillRectangle(SDL_Surface *dst_surface, int x, int y, - int width, int height, unsigned int color) +void SDLFillRectangle(Bitmap *dst_bitmap, int x, int y, int width, int height, + Uint32 color) { - SDL_Surface *surface = (dst_surface == window ? backbuffer : dst_surface); + Bitmap *real_dst_bitmap = (dst_bitmap == window ? backbuffer : dst_bitmap); SDL_Rect rect; - unsigned int color_r = (color >> 16) && 0xff; - unsigned int color_g = (color >> 8) && 0xff; - unsigned int color_b = (color >> 0) && 0xff; + + if (dst_bitmap == backbuffer || dst_bitmap == window) + { + x += video_xoffset; + y += video_yoffset; + } rect.x = x; rect.y = y; rect.w = width; rect.h = height; - SDL_FillRect(surface, &rect, - SDL_MapRGB(surface->format, color_r, color_g, color_b)); + SDL_FillRect(real_dst_bitmap->surface, &rect, color); + + if (dst_bitmap == window) + SDL_UpdateRect(backbuffer->surface, x, y, width, height); +} + +void SDLFadeRectangle(Bitmap *bitmap_cross, int x, int y, int width, int height, + int fade_mode, int fade_delay, int post_delay, + void (*draw_border_function)(void)) +{ + static boolean initialization_needed = TRUE; + static SDL_Surface *surface_source = NULL; + static SDL_Surface *surface_target = NULL; + static SDL_Surface *surface_black = NULL; + SDL_Surface *surface_screen = backbuffer->surface; + SDL_Surface *surface_cross = (bitmap_cross ? bitmap_cross->surface : NULL); + SDL_Rect src_rect, dst_rect; + int src_x = x, src_y = y; + int dst_x = x, dst_y = y; + unsigned int time_last, time_current; + + src_rect.x = src_x; + src_rect.y = src_y; + src_rect.w = width; + src_rect.h = height; + + dst_x += video_xoffset; + dst_y += video_yoffset; + + dst_rect.x = dst_x; + dst_rect.y = dst_y; + dst_rect.w = width; /* (ignored) */ + dst_rect.h = height; /* (ignored) */ + + if (initialization_needed) + { + unsigned int flags = SDL_SRCALPHA; + + /* use same surface type as screen surface */ + if ((surface_screen->flags & SDL_HWSURFACE)) + flags |= SDL_HWSURFACE; + else + flags |= SDL_SWSURFACE; + + /* create surface for temporary copy of screen buffer (source) */ + if ((surface_source = + SDL_CreateRGBSurface(flags, + video.width, + video.height, + surface_screen->format->BitsPerPixel, + surface_screen->format->Rmask, + surface_screen->format->Gmask, + surface_screen->format->Bmask, + surface_screen->format->Amask)) == NULL) + Error(ERR_EXIT, "SDL_CreateRGBSurface() failed: %s", SDL_GetError()); + + /* create surface for cross-fading screen buffer (target) */ + if ((surface_target = + SDL_CreateRGBSurface(flags, + video.width, + video.height, + surface_screen->format->BitsPerPixel, + surface_screen->format->Rmask, + surface_screen->format->Gmask, + surface_screen->format->Bmask, + surface_screen->format->Amask)) == NULL) + Error(ERR_EXIT, "SDL_CreateRGBSurface() failed: %s", SDL_GetError()); + + /* create black surface for fading from/to black */ + if ((surface_black = + SDL_CreateRGBSurface(flags, + video.width, + video.height, + surface_screen->format->BitsPerPixel, + surface_screen->format->Rmask, + surface_screen->format->Gmask, + surface_screen->format->Bmask, + surface_screen->format->Amask)) == NULL) + Error(ERR_EXIT, "SDL_CreateRGBSurface() failed: %s", SDL_GetError()); + + /* completely fill the surface with black color pixels */ + SDL_FillRect(surface_black, NULL, + SDL_MapRGB(surface_screen->format, 0, 0, 0)); + + initialization_needed = FALSE; + } + + /* copy source and target surfaces to temporary surfaces for fading */ + if (fade_mode & FADE_TYPE_TRANSFORM) + { + SDL_BlitSurface(surface_cross, &src_rect, surface_source, &src_rect); + SDL_BlitSurface(surface_screen, &dst_rect, surface_target, &src_rect); + } + else if (fade_mode & FADE_TYPE_FADE_IN) + { + SDL_BlitSurface(surface_black, &src_rect, surface_source, &src_rect); + SDL_BlitSurface(surface_screen, &dst_rect, surface_target, &src_rect); + } + else /* FADE_TYPE_FADE_OUT */ + { + SDL_BlitSurface(surface_screen, &dst_rect, surface_source, &src_rect); + SDL_BlitSurface(surface_black, &src_rect, surface_target, &src_rect); + } + + time_current = SDL_GetTicks(); - if (dst_surface == window) - SDL_UpdateRect(backbuffer, x, y, width, height); + if (fade_mode == FADE_MODE_MELT) + { + boolean done = FALSE; + int melt_pixels = 2; + int melt_columns = width / melt_pixels; + int ypos[melt_columns]; + int max_steps = height / 8 + 32; + int steps_done = 0; + float steps = 0; + int i; + + SDL_BlitSurface(surface_source, &src_rect, surface_screen, &dst_rect); + SDL_SetAlpha(surface_target, 0, 0); /* disable alpha blending */ + + ypos[0] = -GetSimpleRandom(16); + + for (i = 1 ; i < melt_columns; i++) + { + int r = GetSimpleRandom(3) - 1; /* randomly choose from { -1, 0, -1 } */ + + ypos[i] = ypos[i - 1] + r; + + if (ypos[i] > 0) + ypos[i] = 0; + else + if (ypos[i] == -16) + ypos[i] = -15; + } + + while (!done) + { + int steps_final; + + time_last = time_current; + time_current = SDL_GetTicks(); + steps += max_steps * ((float)(time_current - time_last) / fade_delay); + steps_final = MIN(MAX(0, steps), max_steps); + + steps_done++; + + done = (steps_done >= steps_final); + + for (i = 0 ; i < melt_columns; i++) + { + if (ypos[i] < 0) + { + ypos[i]++; + + done = FALSE; + } + else if (ypos[i] < height) + { + int y1 = 16; + int y2 = 8; + int y3 = 8; + int dy = (ypos[i] < y1) ? ypos[i] + 1 : y2 + GetSimpleRandom(y3); + + if (ypos[i] + dy >= height) + dy = height - ypos[i]; + + /* copy part of (appearing) target surface to upper area */ + src_rect.x = src_x + i * melt_pixels; + // src_rect.y = src_y + ypos[i]; + src_rect.y = src_y; + src_rect.w = melt_pixels; + // src_rect.h = dy; + src_rect.h = ypos[i] + dy; + + dst_rect.x = dst_x + i * melt_pixels; + // dst_rect.y = dst_y + ypos[i]; + dst_rect.y = dst_y; + + if (steps_done >= steps_final) + SDL_BlitSurface(surface_target, &src_rect, + surface_screen, &dst_rect); + + ypos[i] += dy; + + /* copy part of (disappearing) source surface to lower area */ + src_rect.x = src_x + i * melt_pixels; + src_rect.y = src_y; + src_rect.w = melt_pixels; + src_rect.h = height - ypos[i]; + + dst_rect.x = dst_x + i * melt_pixels; + dst_rect.y = dst_y + ypos[i]; + + if (steps_done >= steps_final) + SDL_BlitSurface(surface_source, &src_rect, + surface_screen, &dst_rect); + + done = FALSE; + } + else + { + src_rect.x = src_x + i * melt_pixels; + src_rect.y = src_y; + src_rect.w = melt_pixels; + src_rect.h = height; + + dst_rect.x = dst_x + i * melt_pixels; + dst_rect.y = dst_y; + + if (steps_done >= steps_final) + SDL_BlitSurface(surface_target, &src_rect, + surface_screen, &dst_rect); + } + } + + if (steps_done >= steps_final) + { + if (draw_border_function != NULL) + draw_border_function(); + + SDL_UpdateRect(surface_screen, dst_x, dst_y, width, height); + } + } + } + else + { + float alpha; + int alpha_final; + + for (alpha = 0.0; alpha < 255.0;) + { + time_last = time_current; + time_current = SDL_GetTicks(); + alpha += 255 * ((float)(time_current - time_last) / fade_delay); + alpha_final = MIN(MAX(0, alpha), 255); + + /* draw existing (source) image to screen buffer */ + SDL_BlitSurface(surface_source, &src_rect, surface_screen, &dst_rect); + + /* draw new (target) image to screen buffer using alpha blending */ + SDL_SetAlpha(surface_target, SDL_SRCALPHA, alpha_final); + SDL_BlitSurface(surface_target, &src_rect, surface_screen, &dst_rect); + + if (draw_border_function != NULL) + draw_border_function(); + +#if 1 + /* only update the region of the screen that is affected from fading */ + SDL_UpdateRect(surface_screen, dst_x, dst_y, width, height); +#else + SDL_Flip(surface_screen); +#endif + } + } + + Delay(post_delay); } -inline void SDLDrawSimpleLine(SDL_Surface *surface, int from_x, int from_y, - int to_x, int to_y, unsigned int color) +void SDLDrawSimpleLine(Bitmap *dst_bitmap, int from_x, int from_y, + int to_x, int to_y, Uint32 color) { + SDL_Surface *surface = dst_bitmap->surface; SDL_Rect rect; - unsigned int color_r = (color >> 16) & 0xff; - unsigned int color_g = (color >> 8) & 0xff; - unsigned int color_b = (color >> 0) & 0xff; if (from_x > to_x) swap_numbers(&from_x, &to_x); @@ -181,36 +657,1265 @@ inline void SDLDrawSimpleLine(SDL_Surface *surface, int from_x, int from_y, rect.w = (to_x - from_x + 1); rect.h = (to_y - from_y + 1); - SDL_FillRect(surface, &rect, - SDL_MapRGB(surface->format, color_r, color_g, color_b)); + if (dst_bitmap == backbuffer || dst_bitmap == window) + { + rect.x += video_xoffset; + rect.y += video_yoffset; + } + + SDL_FillRect(surface, &rect, color); } -inline boolean SDLOpenAudio(void) +void SDLDrawLine(Bitmap *dst_bitmap, int from_x, int from_y, + int to_x, int to_y, Uint32 color) { - if (SDL_Init(SDL_INIT_AUDIO) < 0) + if (dst_bitmap == backbuffer || dst_bitmap == window) { - Error(ERR_WARN, "SDL_Init() failed: %s", SDL_GetError()); - return FALSE; + from_x += video_xoffset; + from_y += video_yoffset; + to_x += video_xoffset; + to_y += video_yoffset; + } + + sge_Line(dst_bitmap->surface, from_x, from_y, to_x, to_y, color); +} + +#if 0 +void SDLDrawLines(SDL_Surface *surface, struct XY *points, + int num_points, Uint32 color) +{ + int i, x, y; + int line_width = 4; + + for (i = 0; i < num_points - 1; i++) + { + for (x = 0; x < line_width; x++) + { + for (y = 0; y < line_width; y++) + { + int dx = x - line_width / 2; + int dy = y - line_width / 2; + + if ((x == 0 && y == 0) || + (x == 0 && y == line_width - 1) || + (x == line_width - 1 && y == 0) || + (x == line_width - 1 && y == line_width - 1)) + continue; + + sge_Line(surface, points[i].x + dx, points[i].y + dy, + points[i+1].x + dx, points[i+1].y + dy, color); + } + } } +} +#endif - if (Mix_OpenAudio(22050, AUDIO_S16, 2, 512) < 0) +Pixel SDLGetPixel(Bitmap *src_bitmap, int x, int y) +{ + SDL_Surface *surface = src_bitmap->surface; + + if (src_bitmap == backbuffer || src_bitmap == window) { - Error(ERR_WARN, "Mix_OpenAudio() failed: %s", SDL_GetError()); - return FALSE; + x += video_xoffset; + y += video_yoffset; } - Mix_Volume(-1, SDL_MIX_MAXVOLUME / 4); - Mix_VolumeMusic(SDL_MIX_MAXVOLUME / 4); + switch (surface->format->BytesPerPixel) + { + case 1: /* assuming 8-bpp */ + { + return *((Uint8 *)surface->pixels + y * surface->pitch + x); + } + break; - return TRUE; + case 2: /* probably 15-bpp or 16-bpp */ + { + return *((Uint16 *)surface->pixels + y * surface->pitch / 2 + x); + } + break; + + case 3: /* slow 24-bpp mode; usually not used */ + { + /* does this work? */ + Uint8 *pix = (Uint8 *)surface->pixels + y * surface->pitch + x * 3; + Uint32 color = 0; + int shift; + + shift = surface->format->Rshift; + color |= *(pix + shift / 8) >> shift; + shift = surface->format->Gshift; + color |= *(pix + shift / 8) >> shift; + shift = surface->format->Bshift; + color |= *(pix + shift / 8) >> shift; + + return color; + } + break; + + case 4: /* probably 32-bpp */ + { + return *((Uint32 *)surface->pixels + y * surface->pitch / 4 + x); + } + break; + } + + return 0; } -inline void SDLCloseAudio(void) + +/* ========================================================================= */ +/* The following functions were taken from the SGE library */ +/* (SDL Graphics Extension Library) by Anders Lindström */ +/* http://www.etek.chalmers.se/~e8cal1/sge/index.html */ +/* ========================================================================= */ + +void _PutPixel(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color) { - Mix_HaltMusic(); - Mix_HaltChannel(-1); + if (x >= 0 && x <= surface->w - 1 && y >= 0 && y <= surface->h - 1) + { + switch (surface->format->BytesPerPixel) + { + case 1: + { + /* Assuming 8-bpp */ + *((Uint8 *)surface->pixels + y*surface->pitch + x) = color; + } + break; - Mix_CloseAudio(); + case 2: + { + /* Probably 15-bpp or 16-bpp */ + *((Uint16 *)surface->pixels + y*surface->pitch/2 + x) = color; + } + break; + + case 3: + { + /* Slow 24-bpp mode, usually not used */ + Uint8 *pix; + int shift; + + /* Gack - slow, but endian correct */ + pix = (Uint8 *)surface->pixels + y * surface->pitch + x*3; + shift = surface->format->Rshift; + *(pix+shift/8) = color>>shift; + shift = surface->format->Gshift; + *(pix+shift/8) = color>>shift; + shift = surface->format->Bshift; + *(pix+shift/8) = color>>shift; + } + break; + + case 4: + { + /* Probably 32-bpp */ + *((Uint32 *)surface->pixels + y*surface->pitch/4 + x) = color; + } + break; + } + } +} + +void _PutPixelRGB(SDL_Surface *surface, Sint16 x, Sint16 y, + Uint8 R, Uint8 G, Uint8 B) +{ + _PutPixel(surface, x, y, SDL_MapRGB(surface->format, R, G, B)); +} + +void _PutPixel8(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color) +{ + *((Uint8 *)surface->pixels + y*surface->pitch + x) = color; +} + +void _PutPixel16(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color) +{ + *((Uint16 *)surface->pixels + y*surface->pitch/2 + x) = color; +} + +void _PutPixel24(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color) +{ + Uint8 *pix; + int shift; + + /* Gack - slow, but endian correct */ + pix = (Uint8 *)surface->pixels + y * surface->pitch + x*3; + shift = surface->format->Rshift; + *(pix+shift/8) = color>>shift; + shift = surface->format->Gshift; + *(pix+shift/8) = color>>shift; + shift = surface->format->Bshift; + *(pix+shift/8) = color>>shift; +} + +void _PutPixel32(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color) +{ + *((Uint32 *)surface->pixels + y*surface->pitch/4 + x) = color; +} + +void _PutPixelX(SDL_Surface *dest,Sint16 x,Sint16 y,Uint32 color) +{ + switch (dest->format->BytesPerPixel) + { + case 1: + *((Uint8 *)dest->pixels + y*dest->pitch + x) = color; + break; + + case 2: + *((Uint16 *)dest->pixels + y*dest->pitch/2 + x) = color; + break; + + case 3: + _PutPixel24(dest,x,y,color); + break; + + case 4: + *((Uint32 *)dest->pixels + y*dest->pitch/4 + x) = color; + break; + } +} + +void sge_PutPixel(SDL_Surface *surface, Sint16 x, Sint16 y, Uint32 color) +{ + if (SDL_MUSTLOCK(surface)) + { + if (SDL_LockSurface(surface) < 0) + { + return; + } + } + + _PutPixel(surface, x, y, color); + + if (SDL_MUSTLOCK(surface)) + { + SDL_UnlockSurface(surface); + } +} + +void sge_PutPixelRGB(SDL_Surface *surface, Sint16 x, Sint16 y, + Uint8 r, Uint8 g, Uint8 b) +{ + sge_PutPixel(surface, x, y, SDL_MapRGB(surface->format, r, g, b)); +} + +Sint32 sge_CalcYPitch(SDL_Surface *dest, Sint16 y) +{ + if (y >= 0 && y <= dest->h - 1) + { + switch (dest->format->BytesPerPixel) + { + case 1: + return y*dest->pitch; + break; + + case 2: + return y*dest->pitch/2; + break; + + case 3: + return y*dest->pitch; + break; + + case 4: + return y*dest->pitch/4; + break; + } + } + + return -1; +} + +void sge_pPutPixel(SDL_Surface *surface, Sint16 x, Sint32 ypitch, Uint32 color) +{ + if (x >= 0 && x <= surface->w - 1 && ypitch >= 0) + { + switch (surface->format->BytesPerPixel) + { + case 1: + { + /* Assuming 8-bpp */ + *((Uint8 *)surface->pixels + ypitch + x) = color; + } + break; + + case 2: + { + /* Probably 15-bpp or 16-bpp */ + *((Uint16 *)surface->pixels + ypitch + x) = color; + } + break; + + case 3: + { + /* Slow 24-bpp mode, usually not used */ + Uint8 *pix; + int shift; + + /* Gack - slow, but endian correct */ + pix = (Uint8 *)surface->pixels + ypitch + x*3; + shift = surface->format->Rshift; + *(pix+shift/8) = color>>shift; + shift = surface->format->Gshift; + *(pix+shift/8) = color>>shift; + shift = surface->format->Bshift; + *(pix+shift/8) = color>>shift; + } + break; + + case 4: + { + /* Probably 32-bpp */ + *((Uint32 *)surface->pixels + ypitch + x) = color; + } + break; + } + } +} + +void sge_HLine(SDL_Surface *Surface, Sint16 x1, Sint16 x2, Sint16 y, + Uint32 Color) +{ + SDL_Rect l; + + if (SDL_MUSTLOCK(Surface)) + { + if (SDL_LockSurface(Surface) < 0) + { + return; + } + } + + if (x1 > x2) + { + Sint16 tmp = x1; + x1 = x2; + x2 = tmp; + } + + /* Do the clipping */ + if (y < 0 || y > Surface->h - 1 || x1 > Surface->w - 1 || x2 < 0) + return; + if (x1 < 0) + x1 = 0; + if (x2 > Surface->w - 1) + x2 = Surface->w - 1; + + l.x = x1; + l.y = y; + l.w = x2 - x1 + 1; + l.h = 1; + + SDL_FillRect(Surface, &l, Color); + + if (SDL_MUSTLOCK(Surface)) + { + SDL_UnlockSurface(Surface); + } +} + +void sge_HLineRGB(SDL_Surface *Surface, Sint16 x1, Sint16 x2, Sint16 y, + Uint8 R, Uint8 G, Uint8 B) +{ + sge_HLine(Surface, x1, x2, y, SDL_MapRGB(Surface->format, R, G, B)); +} + +void _HLine(SDL_Surface *Surface, Sint16 x1, Sint16 x2, Sint16 y, Uint32 Color) +{ + SDL_Rect l; + + if (x1 > x2) + { + Sint16 tmp = x1; + x1 = x2; + x2 = tmp; + } + + /* Do the clipping */ + if (y < 0 || y > Surface->h - 1 || x1 > Surface->w - 1 || x2 < 0) + return; + if (x1 < 0) + x1 = 0; + if (x2 > Surface->w - 1) + x2 = Surface->w - 1; + + l.x = x1; + l.y = y; + l.w = x2 - x1 + 1; + l.h = 1; + + SDL_FillRect(Surface, &l, Color); +} + +void sge_VLine(SDL_Surface *Surface, Sint16 x, Sint16 y1, Sint16 y2, + Uint32 Color) +{ + SDL_Rect l; + + if (SDL_MUSTLOCK(Surface)) + { + if (SDL_LockSurface(Surface) < 0) + { + return; + } + } + + if (y1 > y2) + { + Sint16 tmp = y1; + y1 = y2; + y2 = tmp; + } + + /* Do the clipping */ + if (x < 0 || x > Surface->w - 1 || y1 > Surface->h - 1 || y2 < 0) + return; + if (y1 < 0) + y1 = 0; + if (y2 > Surface->h - 1) + y2 = Surface->h - 1; + + l.x = x; + l.y = y1; + l.w = 1; + l.h = y2 - y1 + 1; + + SDL_FillRect(Surface, &l, Color); + + if (SDL_MUSTLOCK(Surface)) + { + SDL_UnlockSurface(Surface); + } +} + +void sge_VLineRGB(SDL_Surface *Surface, Sint16 x, Sint16 y1, Sint16 y2, + Uint8 R, Uint8 G, Uint8 B) +{ + sge_VLine(Surface, x, y1, y2, SDL_MapRGB(Surface->format, R, G, B)); +} + +void _VLine(SDL_Surface *Surface, Sint16 x, Sint16 y1, Sint16 y2, Uint32 Color) +{ + SDL_Rect l; + + if (y1 > y2) + { + Sint16 tmp = y1; + y1 = y2; + y2 = tmp; + } + + /* Do the clipping */ + if (x < 0 || x > Surface->w - 1 || y1 > Surface->h - 1 || y2 < 0) + return; + if (y1 < 0) + y1 = 0; + if (y2 > Surface->h - 1) + y2 = Surface->h - 1; + + l.x = x; + l.y = y1; + l.w = 1; + l.h = y2 - y1 + 1; + + SDL_FillRect(Surface, &l, Color); +} + +void sge_DoLine(SDL_Surface *Surface, Sint16 x1, Sint16 y1, + Sint16 x2, Sint16 y2, Uint32 Color, + void Callback(SDL_Surface *Surf, Sint16 X, Sint16 Y, + Uint32 Color)) +{ + Sint16 dx, dy, sdx, sdy, x, y, px, py; + + dx = x2 - x1; + dy = y2 - y1; + + sdx = (dx < 0) ? -1 : 1; + sdy = (dy < 0) ? -1 : 1; + + dx = sdx * dx + 1; + dy = sdy * dy + 1; + + x = y = 0; + + px = x1; + py = y1; + + if (dx >= dy) + { + for (x = 0; x < dx; x++) + { + Callback(Surface, px, py, Color); + + y += dy; + if (y >= dx) + { + y -= dx; + py += sdy; + } + + px += sdx; + } + } + else + { + for (y = 0; y < dy; y++) + { + Callback(Surface, px, py, Color); + + x += dx; + if (x >= dy) + { + x -= dy; + px += sdx; + } + + py += sdy; + } + } +} + +void sge_DoLineRGB(SDL_Surface *Surface, Sint16 X1, Sint16 Y1, + Sint16 X2, Sint16 Y2, Uint8 R, Uint8 G, Uint8 B, + void Callback(SDL_Surface *Surf, Sint16 X, Sint16 Y, + Uint32 Color)) +{ + sge_DoLine(Surface, X1, Y1, X2, Y2, + SDL_MapRGB(Surface->format, R, G, B), Callback); +} + +void sge_Line(SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, + Uint32 Color) +{ + if (SDL_MUSTLOCK(Surface)) + { + if (SDL_LockSurface(Surface) < 0) + return; + } + + /* Draw the line */ + sge_DoLine(Surface, x1, y1, x2, y2, Color, _PutPixel); + + /* unlock the display */ + if (SDL_MUSTLOCK(Surface)) + { + SDL_UnlockSurface(Surface); + } +} + +void sge_LineRGB(SDL_Surface *Surface, Sint16 x1, Sint16 y1, Sint16 x2, + Sint16 y2, Uint8 R, Uint8 G, Uint8 B) +{ + sge_Line(Surface, x1, y1, x2, y2, SDL_MapRGB(Surface->format, R, G, B)); +} + +void SDLPutPixel(Bitmap *dst_bitmap, int x, int y, Pixel pixel) +{ + if (dst_bitmap == backbuffer || dst_bitmap == window) + { + x += video_xoffset; + y += video_yoffset; + } + + sge_PutPixel(dst_bitmap->surface, x, y, pixel); +} + + +/* + ----------------------------------------------------------------------------- + quick (no, it's slow) and dirty hack to "invert" rectangle inside SDL surface + ----------------------------------------------------------------------------- +*/ + +void SDLInvertArea(Bitmap *bitmap, int src_x, int src_y, + int width, int height, Uint32 color) +{ + int x, y; + + for (y = src_y; y < src_y + height; y++) + { + for (x = src_x; x < src_x + width; x++) + { + Uint32 pixel = SDLGetPixel(bitmap, x, y); + + SDLPutPixel(bitmap, x, y, pixel == BLACK_PIXEL ? color : BLACK_PIXEL); + } + } +} + +void SDLCopyInverseMasked(Bitmap *src_bitmap, Bitmap *dst_bitmap, + int src_x, int src_y, int width, int height, + int dst_x, int dst_y) +{ + int x, y; + + for (y = 0; y < height; y++) + { + for (x = 0; x < width; x++) + { + Uint32 pixel = SDLGetPixel(src_bitmap, src_x + x, src_y + y); + + if (pixel != BLACK_PIXEL) + SDLPutPixel(dst_bitmap, dst_x + x, dst_y + y, BLACK_PIXEL); + } + } +} + + +/* ========================================================================= */ +/* The following functions were taken from the SDL_gfx library version 2.0.3 */ +/* (Rotozoomer) by Andreas Schiffler */ +/* http://www.ferzkopp.net/Software/SDL_gfx-2.0/index.html */ +/* ========================================================================= */ + +/* + ----------------------------------------------------------------------------- + 32 bit zoomer + + zoomes 32bit RGBA/ABGR 'src' surface to 'dst' surface. + ----------------------------------------------------------------------------- +*/ + +typedef struct +{ + Uint8 r; + Uint8 g; + Uint8 b; + Uint8 a; +} tColorRGBA; + +int zoomSurfaceRGBA_scaleDownBy2(SDL_Surface *src, SDL_Surface *dst) +{ + int x, y; + tColorRGBA *sp, *csp, *dp; + int sgap, dgap; + + /* pointer setup */ + sp = csp = (tColorRGBA *) src->pixels; + dp = (tColorRGBA *) dst->pixels; + sgap = src->pitch - src->w * 4; + dgap = dst->pitch - dst->w * 4; + + for (y = 0; y < dst->h; y++) + { + sp = csp; + + for (x = 0; x < dst->w; x++) + { + tColorRGBA *sp0 = sp; + tColorRGBA *sp1 = (tColorRGBA *) ((Uint8 *) sp + src->pitch); + tColorRGBA *sp00 = &sp0[0]; + tColorRGBA *sp01 = &sp0[1]; + tColorRGBA *sp10 = &sp1[0]; + tColorRGBA *sp11 = &sp1[1]; + tColorRGBA new; + + /* create new color pixel from all four source color pixels */ + new.r = (sp00->r + sp01->r + sp10->r + sp11->r) / 4; + new.g = (sp00->g + sp01->g + sp10->g + sp11->g) / 4; + new.b = (sp00->b + sp01->b + sp10->b + sp11->b) / 4; + new.a = (sp00->a + sp01->a + sp10->a + sp11->a) / 4; + + /* draw */ + *dp = new; + + /* advance source pointers */ + sp += 2; + + /* advance destination pointer */ + dp++; + } + + /* advance source pointer */ + csp = (tColorRGBA *) ((Uint8 *) csp + 2 * src->pitch); + + /* advance destination pointers */ + dp = (tColorRGBA *) ((Uint8 *) dp + dgap); + } + + return 0; +} + +int zoomSurfaceRGBA(SDL_Surface *src, SDL_Surface *dst) +{ + int x, y, sx, sy, *sax, *say, *csax, *csay, csx, csy; + tColorRGBA *sp, *csp, *dp; + int sgap, dgap; + + /* use specialized zoom function when scaling down to exactly half size */ + if (src->w == 2 * dst->w && + src->h == 2 * dst->h) + return zoomSurfaceRGBA_scaleDownBy2(src, dst); + + /* variable setup */ + sx = (int) (65536.0 * (float) src->w / (float) dst->w); + sy = (int) (65536.0 * (float) src->h / (float) dst->h); + + /* allocate memory for row increments */ + sax = (int *)checked_malloc((dst->w + 1) * sizeof(Uint32)); + say = (int *)checked_malloc((dst->h + 1) * sizeof(Uint32)); + + /* precalculate row increments */ + csx = 0; + csax = sax; + for (x = 0; x <= dst->w; x++) + { + *csax = csx; + csax++; + csx &= 0xffff; + csx += sx; + } + + csy = 0; + csay = say; + for (y = 0; y <= dst->h; y++) + { + *csay = csy; + csay++; + csy &= 0xffff; + csy += sy; + } + + /* pointer setup */ + sp = csp = (tColorRGBA *) src->pixels; + dp = (tColorRGBA *) dst->pixels; + sgap = src->pitch - src->w * 4; + dgap = dst->pitch - dst->w * 4; + + csay = say; + for (y = 0; y < dst->h; y++) + { + sp = csp; + csax = sax; + + for (x = 0; x < dst->w; x++) + { + /* draw */ + *dp = *sp; + + /* advance source pointers */ + csax++; + sp += (*csax >> 16); + + /* advance destination pointer */ + dp++; + } + + /* advance source pointer */ + csay++; + csp = (tColorRGBA *) ((Uint8 *) csp + (*csay >> 16) * src->pitch); + + /* advance destination pointers */ + dp = (tColorRGBA *) ((Uint8 *) dp + dgap); + } + + free(sax); + free(say); + + return 0; +} + +/* + ----------------------------------------------------------------------------- + 8 bit zoomer + + zoomes 8 bit palette/Y 'src' surface to 'dst' surface + ----------------------------------------------------------------------------- +*/ + +int zoomSurfaceY(SDL_Surface * src, SDL_Surface * dst) +{ + Uint32 x, y, sx, sy, *sax, *say, *csax, *csay, csx, csy; + Uint8 *sp, *dp, *csp; + int dgap; + + /* variable setup */ + sx = (Uint32) (65536.0 * (float) src->w / (float) dst->w); + sy = (Uint32) (65536.0 * (float) src->h / (float) dst->h); + + /* allocate memory for row increments */ + sax = (Uint32 *)checked_malloc(dst->w * sizeof(Uint32)); + say = (Uint32 *)checked_malloc(dst->h * sizeof(Uint32)); + + /* precalculate row increments */ + csx = 0; + csax = sax; + for (x = 0; x < dst->w; x++) + { + csx += sx; + *csax = (csx >> 16); + csx &= 0xffff; + csax++; + } + + csy = 0; + csay = say; + for (y = 0; y < dst->h; y++) + { + csy += sy; + *csay = (csy >> 16); + csy &= 0xffff; + csay++; + } + + csx = 0; + csax = sax; + for (x = 0; x < dst->w; x++) + { + csx += (*csax); + csax++; + } + + csy = 0; + csay = say; + for (y = 0; y < dst->h; y++) + { + csy += (*csay); + csay++; + } + + /* pointer setup */ + sp = csp = (Uint8 *) src->pixels; + dp = (Uint8 *) dst->pixels; + dgap = dst->pitch - dst->w; + + /* draw */ + csay = say; + for (y = 0; y < dst->h; y++) + { + csax = sax; + sp = csp; + for (x = 0; x < dst->w; x++) + { + /* draw */ + *dp = *sp; + + /* advance source pointers */ + sp += (*csax); + csax++; + + /* advance destination pointer */ + dp++; + } + + /* advance source pointer (for row) */ + csp += ((*csay) * src->pitch); + csay++; + + /* advance destination pointers */ + dp += dgap; + } + + free(sax); + free(say); + + return 0; +} + +/* + ----------------------------------------------------------------------------- + zoomSurface() + + Zooms a 32bit or 8bit 'src' surface to newly created 'dst' surface. + 'zoomx' and 'zoomy' are scaling factors for width and height. + If the surface is not 8bit or 32bit RGBA/ABGR it will be converted + into a 32bit RGBA format on the fly. + ----------------------------------------------------------------------------- +*/ + +SDL_Surface *zoomSurface(SDL_Surface *src, int dst_width, int dst_height) +{ + SDL_Surface *zoom_src = NULL; + SDL_Surface *zoom_dst = NULL; + boolean is_converted = FALSE; + boolean is_32bit; + int i; + + if (src == NULL) + return NULL; + + /* determine if source surface is 32 bit or 8 bit */ + is_32bit = (src->format->BitsPerPixel == 32); + + if (is_32bit || src->format->BitsPerPixel == 8) + { + /* use source surface 'as is' */ + zoom_src = src; + } + else + { + /* new source surface is 32 bit with a defined RGB ordering */ + zoom_src = SDL_CreateRGBSurface(SDL_SWSURFACE, src->w, src->h, 32, + 0x000000ff, 0x0000ff00, 0x00ff0000, 0); + SDL_BlitSurface(src, NULL, zoom_src, NULL); + is_32bit = TRUE; + is_converted = TRUE; + } + + /* allocate surface to completely contain the zoomed surface */ + if (is_32bit) + { + /* target surface is 32 bit with source RGBA/ABGR ordering */ + zoom_dst = SDL_CreateRGBSurface(SDL_SWSURFACE, dst_width, dst_height, 32, + zoom_src->format->Rmask, + zoom_src->format->Gmask, + zoom_src->format->Bmask, 0); + } + else + { + /* target surface is 8 bit */ + zoom_dst = SDL_CreateRGBSurface(SDL_SWSURFACE, dst_width, dst_height, 8, + 0, 0, 0, 0); + } + + /* lock source surface */ + SDL_LockSurface(zoom_src); + + /* check which kind of surface we have */ + if (is_32bit) + { + /* call the 32 bit transformation routine to do the zooming */ + zoomSurfaceRGBA(zoom_src, zoom_dst); + } + else + { + /* copy palette */ + for (i = 0; i < zoom_src->format->palette->ncolors; i++) + zoom_dst->format->palette->colors[i] = + zoom_src->format->palette->colors[i]; + zoom_dst->format->palette->ncolors = zoom_src->format->palette->ncolors; + + /* call the 8 bit transformation routine to do the zooming */ + zoomSurfaceY(zoom_src, zoom_dst); + } + + /* unlock source surface */ + SDL_UnlockSurface(zoom_src); + + /* free temporary surface */ + if (is_converted) + SDL_FreeSurface(zoom_src); + + /* return destination surface */ + return zoom_dst; +} + +void SDLZoomBitmap(Bitmap *src_bitmap, Bitmap *dst_bitmap) +{ + SDL_Surface *sdl_surface_tmp; + int dst_width = dst_bitmap->width; + int dst_height = dst_bitmap->height; + + /* throw away old destination surface */ + SDL_FreeSurface(dst_bitmap->surface); + + /* create zoomed temporary surface from source surface */ + sdl_surface_tmp = zoomSurface(src_bitmap->surface, dst_width, dst_height); + + /* create native format destination surface from zoomed temporary surface */ + dst_bitmap->surface = SDL_DisplayFormat(sdl_surface_tmp); + + /* free temporary surface */ + SDL_FreeSurface(sdl_surface_tmp); +} + + +/* ========================================================================= */ +/* load image to bitmap */ +/* ========================================================================= */ + +Bitmap *SDLLoadImage(char *filename) +{ + Bitmap *new_bitmap = CreateBitmapStruct(); + SDL_Surface *sdl_image_tmp; + + /* load image to temporary surface */ + if ((sdl_image_tmp = IMG_Load(filename)) == NULL) + { + SetError("IMG_Load(): %s", SDL_GetError()); + + return NULL; + } + + UPDATE_BUSY_STATE(); + + /* create native non-transparent surface for current image */ + if ((new_bitmap->surface = SDL_DisplayFormat(sdl_image_tmp)) == NULL) + { + SetError("SDL_DisplayFormat(): %s", SDL_GetError()); + + return NULL; + } + + UPDATE_BUSY_STATE(); + + /* create native transparent surface for current image */ + SDL_SetColorKey(sdl_image_tmp, SDL_SRCCOLORKEY, + SDL_MapRGB(sdl_image_tmp->format, 0x00, 0x00, 0x00)); + if ((new_bitmap->surface_masked = SDL_DisplayFormat(sdl_image_tmp)) == NULL) + { + SetError("SDL_DisplayFormat(): %s", SDL_GetError()); + + return NULL; + } + + UPDATE_BUSY_STATE(); + + /* free temporary surface */ + SDL_FreeSurface(sdl_image_tmp); + + new_bitmap->width = new_bitmap->surface->w; + new_bitmap->height = new_bitmap->surface->h; + + return new_bitmap; +} + + +/* ------------------------------------------------------------------------- */ +/* custom cursor fuctions */ +/* ------------------------------------------------------------------------- */ + +static SDL_Cursor *create_cursor(struct MouseCursorInfo *cursor_info) +{ + return SDL_CreateCursor(cursor_info->data, cursor_info->mask, + cursor_info->width, cursor_info->height, + cursor_info->hot_x, cursor_info->hot_y); +} + +void SDLSetMouseCursor(struct MouseCursorInfo *cursor_info) +{ + static struct MouseCursorInfo *last_cursor_info = NULL; + static struct MouseCursorInfo *last_cursor_info2 = NULL; + static SDL_Cursor *cursor_default = NULL; + static SDL_Cursor *cursor_current = NULL; + + /* if invoked for the first time, store the SDL default cursor */ + if (cursor_default == NULL) + cursor_default = SDL_GetCursor(); + + /* only create new cursor if cursor info (custom only) has changed */ + if (cursor_info != NULL && cursor_info != last_cursor_info) + { + cursor_current = create_cursor(cursor_info); + last_cursor_info = cursor_info; + } + + /* only set new cursor if cursor info (custom or NULL) has changed */ + if (cursor_info != last_cursor_info2) + SDL_SetCursor(cursor_info ? cursor_current : cursor_default); + + last_cursor_info2 = cursor_info; +} + + +/* ========================================================================= */ +/* audio functions */ +/* ========================================================================= */ + +void SDLOpenAudio(void) +{ + if (!strEqual(setup.system.sdl_audiodriver, ARG_DEFAULT)) + SDL_putenv(getStringCat2("SDL_AUDIODRIVER=", setup.system.sdl_audiodriver)); + + if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) + { + Error(ERR_WARN, "SDL_InitSubSystem() failed: %s", SDL_GetError()); + return; + } + + if (Mix_OpenAudio(DEFAULT_AUDIO_SAMPLE_RATE, MIX_DEFAULT_FORMAT, + AUDIO_NUM_CHANNELS_STEREO, + setup.system.audio_fragment_size) < 0) + { + Error(ERR_WARN, "Mix_OpenAudio() failed: %s", SDL_GetError()); + return; + } + + audio.sound_available = TRUE; + audio.music_available = TRUE; + audio.loops_available = TRUE; + audio.sound_enabled = TRUE; + + /* set number of available mixer channels */ + audio.num_channels = Mix_AllocateChannels(NUM_MIXER_CHANNELS); + audio.music_channel = MUSIC_CHANNEL; + audio.first_sound_channel = FIRST_SOUND_CHANNEL; + + Mixer_InitChannels(); +} + +void SDLCloseAudio(void) +{ + Mix_HaltMusic(); + Mix_HaltChannel(-1); + + Mix_CloseAudio(); + SDL_QuitSubSystem(SDL_INIT_AUDIO); +} + + +/* ========================================================================= */ +/* event functions */ +/* ========================================================================= */ + +void SDLNextEvent(Event *event) +{ + SDL_WaitEvent(event); + + if (event->type == EVENT_BUTTONPRESS || + event->type == EVENT_BUTTONRELEASE) + { + if (((ButtonEvent *)event)->x > video_xoffset) + ((ButtonEvent *)event)->x -= video_xoffset; + else + ((ButtonEvent *)event)->x = 0; + if (((ButtonEvent *)event)->y > video_yoffset) + ((ButtonEvent *)event)->y -= video_yoffset; + else + ((ButtonEvent *)event)->y = 0; + } + else if (event->type == EVENT_MOTIONNOTIFY) + { + if (((MotionEvent *)event)->x > video_xoffset) + ((MotionEvent *)event)->x -= video_xoffset; + else + ((MotionEvent *)event)->x = 0; + if (((MotionEvent *)event)->y > video_yoffset) + ((MotionEvent *)event)->y -= video_yoffset; + else + ((MotionEvent *)event)->y = 0; + } +} + + +/* ========================================================================= */ +/* joystick functions */ +/* ========================================================================= */ + +static SDL_Joystick *sdl_joystick[MAX_PLAYERS] = { NULL, NULL, NULL, NULL }; +static int sdl_js_axis[MAX_PLAYERS][2] = { {0, 0}, {0, 0}, {0, 0}, {0, 0} }; +static int sdl_js_button[MAX_PLAYERS][2] = { {0, 0}, {0, 0}, {0, 0}, {0, 0} }; + +static boolean SDLOpenJoystick(int nr) +{ + if (nr < 0 || nr > MAX_PLAYERS) + return FALSE; + + return ((sdl_joystick[nr] = SDL_JoystickOpen(nr)) == NULL ? FALSE : TRUE); +} + +static void SDLCloseJoystick(int nr) +{ + if (nr < 0 || nr > MAX_PLAYERS) + return; + + SDL_JoystickClose(sdl_joystick[nr]); +} + +static boolean SDLCheckJoystickOpened(int nr) +{ + if (nr < 0 || nr > MAX_PLAYERS) + return FALSE; + + return (SDL_JoystickOpened(nr) ? TRUE : FALSE); +} + +void HandleJoystickEvent(Event *event) +{ + switch(event->type) + { + case SDL_JOYAXISMOTION: + if (event->jaxis.axis < 2) + sdl_js_axis[event->jaxis.which][event->jaxis.axis]= event->jaxis.value; + break; + + case SDL_JOYBUTTONDOWN: + if (event->jbutton.button < 2) + sdl_js_button[event->jbutton.which][event->jbutton.button] = TRUE; + break; + + case SDL_JOYBUTTONUP: + if (event->jbutton.button < 2) + sdl_js_button[event->jbutton.which][event->jbutton.button] = FALSE; + break; + + default: + break; + } +} + +void SDLInitJoysticks() +{ + static boolean sdl_joystick_subsystem_initialized = FALSE; + boolean print_warning = !sdl_joystick_subsystem_initialized; + int i; + + if (!sdl_joystick_subsystem_initialized) + { + sdl_joystick_subsystem_initialized = TRUE; + + if (SDL_Init(SDL_INIT_JOYSTICK) < 0) + { + Error(ERR_EXIT, "SDL_Init() failed: %s", SDL_GetError()); + return; + } + } + + for (i = 0; i < MAX_PLAYERS; i++) + { + /* get configured joystick for this player */ + char *device_name = setup.input[i].joy.device_name; + int joystick_nr = getJoystickNrFromDeviceName(device_name); + + if (joystick_nr >= SDL_NumJoysticks()) + { + if (setup.input[i].use_joystick && print_warning) + Error(ERR_WARN, "cannot find joystick %d", joystick_nr); + + joystick_nr = -1; + } + + /* misuse joystick file descriptor variable to store joystick number */ + joystick.fd[i] = joystick_nr; + + if (joystick_nr == -1) + continue; + + /* this allows subsequent calls to 'InitJoysticks' for re-initialization */ + if (SDLCheckJoystickOpened(joystick_nr)) + SDLCloseJoystick(joystick_nr); + + if (!setup.input[i].use_joystick) + continue; + + if (!SDLOpenJoystick(joystick_nr)) + { + if (print_warning) + Error(ERR_WARN, "cannot open joystick %d", joystick_nr); + + continue; + } + + joystick.status = JOYSTICK_ACTIVATED; + } +} + +boolean SDLReadJoystick(int nr, int *x, int *y, boolean *b1, boolean *b2) +{ + if (nr < 0 || nr >= MAX_PLAYERS) + return FALSE; + + if (x != NULL) + *x = sdl_js_axis[nr][0]; + if (y != NULL) + *y = sdl_js_axis[nr][1]; + + if (b1 != NULL) + *b1 = sdl_js_button[nr][0]; + if (b2 != NULL) + *b2 = sdl_js_button[nr][1]; + + return TRUE; } #endif /* TARGET_SDL */