ref: bf1980dac9f1ee46e50d601a2635a4ef07903550
dir: /setup/display.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // Copyright(C) 2006 Simon Howard // // 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 2 // 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, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA // 02111-1307, USA. // #include <string.h> #include "textscreen.h" #include "display.h" typedef struct { int w, h; } screen_mode_t; // List of aspect ratio-uncorrected modes static screen_mode_t screen_modes_unscaled[] = { { 320, 200 }, { 640, 400 }, { 960, 600 }, { 1280, 800 }, { 1600, 1000 }, { 0, 0}, }; // List of aspect ratio-corrected modes static screen_mode_t screen_modes_scaled[] = { { 256, 200 }, { 320, 240 }, { 512, 400 }, { 640, 480 }, { 800, 600 }, { 960, 720 }, { 1024, 800 }, { 1280, 960 }, { 1280, 1000 }, { 1600, 1200 }, { 0, 0}, }; // List of fullscreen modes generated at runtime static screen_mode_t *screen_modes_fullscreen = NULL; static int vidmode = 0; char *video_driver = ""; int autoadjust_video_settings = 1; int aspect_ratio_correct = 1; int fullscreen = 1; int screen_width = 320; int screen_height = 200; int startup_delay = 1000; int show_endoom = 1; // These are the last screen width/height values that were chosen by the // user. These are used when finding the "nearest" mode, so when // changing the fullscreen / aspect ratio options, the setting does not // jump around. static int selected_screen_width = 0, selected_screen_height; static int system_video_env_set; // Set the SDL_VIDEODRIVER environment variable void SetDisplayDriver(void) { static int first_time = 1; if (first_time) { system_video_env_set = getenv("SDL_VIDEODRIVER") != NULL; first_time = 0; } // Don't override the command line environment, if it has been set. if (system_video_env_set) { return; } // Use the value from the configuration file, if it has been set. if (strcmp(video_driver, "") != 0) { char *env_string; env_string = malloc(strlen(video_driver) + 30); sprintf(env_string, "SDL_VIDEODRIVER=%s", video_driver); putenv(env_string); free(env_string); } else { #ifdef _WIN32 // On Windows, use DirectX over windib by default. putenv("SDL_VIDEODRIVER=directx"); #endif } } static void ModeSelected(TXT_UNCAST_ARG(widget), TXT_UNCAST_ARG(mode)) { TXT_CAST_ARG(screen_mode_t, mode); screen_width = mode->w; screen_height = mode->h; // This is now the most recently selected screen width selected_screen_width = screen_width; selected_screen_height = screen_height; } static int GoodFullscreenMode(screen_mode_t *mode) { int w, h; w = mode->w; h = mode->h; // 320x200 and 640x400 are always good (special case) if ((w == 320 && h == 200) || (w == 640 && h == 400)) { return 1; } // Special case: 320x240 letterboxed mode is okay (but not aspect // ratio corrected 320x240) if (w == 320 && h == 240 && !aspect_ratio_correct) { return 1; } // Ignore all modes less than 640x480 return w >= 640 && h >= 480; } // Build screen_modes_fullscreen static void BuildFullscreenModesList(void) { SDL_Rect **modes; screen_mode_t *m1; screen_mode_t *m2; screen_mode_t m; int num_modes; int i; // Free the existing modes list, if one exists if (screen_modes_fullscreen != NULL) { free(screen_modes_fullscreen); } // Get a list of fullscreen modes and find out how many // modes are in the list. modes = SDL_ListModes(NULL, SDL_FULLSCREEN); for (num_modes=0; modes[num_modes] != NULL; ++num_modes); // Build the screen_modes_fullscreen array screen_modes_fullscreen = malloc(sizeof(screen_mode_t) * (num_modes + 1)); for (i=0; i<num_modes; ++i) { screen_modes_fullscreen[i].w = modes[i]->w; screen_modes_fullscreen[i].h = modes[i]->h; } screen_modes_fullscreen[i].w = 0; screen_modes_fullscreen[i].h = 0; // Reverse the order of the modes list (smallest modes first) for (i=0; i<num_modes / 2; ++i) { m1 = &screen_modes_fullscreen[i]; m2 = &screen_modes_fullscreen[num_modes - 1 - i]; memcpy(&m, m1, sizeof(screen_mode_t)); memcpy(m1, m2, sizeof(screen_mode_t)); memcpy(m2, &m, sizeof(screen_mode_t)); } } static int FindBestMode(screen_mode_t *modes) { int i; int best_mode; int best_mode_diff; int diff; best_mode = -1; best_mode_diff = 0; for (i=0; modes[i].w != 0; ++i) { if (fullscreen && !GoodFullscreenMode(&modes[i])) { continue; } diff = (selected_screen_width - modes[i].w) * (selected_screen_width - modes[i].w) + (selected_screen_height - modes[i].h) * (selected_screen_height - modes[i].h); if (best_mode == -1 || diff < best_mode_diff) { best_mode_diff = diff; best_mode = i; } } return best_mode; } static void GenerateModesTable(TXT_UNCAST_ARG(widget), TXT_UNCAST_ARG(modes_table)) { TXT_CAST_ARG(txt_table_t, modes_table); char buf[15]; screen_mode_t *modes; txt_radiobutton_t *rbutton; int i; // Pick which modes list to use if (fullscreen) { if (screen_modes_fullscreen == NULL) { BuildFullscreenModesList(); } modes = screen_modes_fullscreen; } else if (aspect_ratio_correct) { modes = screen_modes_scaled; } else { modes = screen_modes_unscaled; } // Build the table TXT_ClearTable(modes_table); TXT_SetColumnWidths(modes_table, 15, 15, 15); for (i=0; modes[i].w != 0; ++i) { // Skip bad fullscreen modes if (fullscreen && !GoodFullscreenMode(&modes[i])) { continue; } sprintf(buf, "%ix%i", modes[i].w, modes[i].h); rbutton = TXT_NewRadioButton(buf, &vidmode, i); TXT_AddWidget(modes_table, rbutton); TXT_SignalConnect(rbutton, "selected", ModeSelected, &modes[i]); } // Find the nearest mode in the list that matches the current // settings vidmode = FindBestMode(modes); screen_width = modes[vidmode].w; screen_height = modes[vidmode].h; } #ifdef _WIN32 static int win32_video_driver = 0; static char *win32_video_drivers[] = { "DirectX", "Windows GDI", }; // Restart the textscreen library. Used when the video_driver variable // is changed. static void RestartTextscreen(void) { TXT_Shutdown(); SetDisplayDriver(); TXT_Init(); } static void SetWin32VideoDriver(void) { if (!strcmp(video_driver, "windib")) { win32_video_driver = 1; } else { win32_video_driver = 0; } } static void UpdateVideoDriver(TXT_UNCAST_ARG(widget), TXT_UNCAST_ARG(modes_table)) { TXT_CAST_ARG(txt_table_t, modes_table); char *drivers[] = { "", "windib", }; video_driver = drivers[win32_video_driver != 0]; // When the video driver is changed, we need to restart the textscreen // library. RestartTextscreen(); // Rebuild the video modes list BuildFullscreenModesList(); GenerateModesTable(NULL, modes_table); } #endif void ConfigDisplay(void) { txt_window_t *window; txt_table_t *modes_table; txt_checkbox_t *fs_checkbox; txt_checkbox_t *ar_checkbox; // First time in? Initialise selected_screen_{width,height} if (selected_screen_width == 0) { selected_screen_width = screen_width; selected_screen_height = screen_height; } // Open the window window = TXT_NewWindow("Display Configuration"); TXT_SetWindowPosition(window, TXT_HORIZ_CENTER, TXT_VERT_TOP, 40, 5); TXT_AddWidgets(window, fs_checkbox = TXT_NewCheckBox("Fullscreen", &fullscreen), ar_checkbox = TXT_NewCheckBox("Correct aspect ratio", &aspect_ratio_correct), NULL); modes_table = TXT_NewTable(3); // On Windows, there is an extra control to change between // the Windows GDI and DirectX video drivers. #ifdef _WIN32 { txt_table_t *driver_table; txt_dropdown_list_t *driver_list; driver_table = TXT_NewTable(2); TXT_SetColumnWidths(driver_table, 20, 0); TXT_AddWidgets(driver_table, TXT_NewLabel("Video driver"), driver_list = TXT_NewDropdownList(&win32_video_driver, win32_video_drivers, 2), NULL); TXT_SignalConnect(driver_list, "changed", UpdateVideoDriver, modes_table); SetWin32VideoDriver(); TXT_AddWidget(window, driver_table); } #endif // Screen modes list TXT_AddWidgets(window, TXT_NewSeparator("Screen mode"), modes_table, TXT_NewSeparator("Misc."), TXT_NewCheckBox("Show ENDOOM screen", &show_endoom), NULL); TXT_SignalConnect(fs_checkbox, "changed", GenerateModesTable, modes_table); TXT_SignalConnect(ar_checkbox, "changed", GenerateModesTable, modes_table); GenerateModesTable(NULL, modes_table); }