src/video/win32/SDL_win32modes.c
changeset 1895 c121d94672cb
child 1913 83420da906a5
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/win32/SDL_win32modes.c	Mon Jul 10 21:04:37 2006 +0000
@@ -0,0 +1,227 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#include "SDL_win32video.h"
+
+
+/* FIXME: Each call to EnumDisplaySettings() takes about 6 ms on my laptop.
+          With 500 or so modes, this takes almost 3 seconds to run!
+*/
+
+static SDL_bool
+WIN_GetDisplayMode(LPCTSTR deviceName, DWORD index, SDL_DisplayMode * mode)
+{
+    SDL_DisplayModeData *data;
+    DEVMODE devmode;
+    HDC hdc;
+
+    devmode.dmSize = sizeof(devmode);
+    devmode.dmDriverExtra = 0;
+    if (!EnumDisplaySettings(deviceName, index, &devmode)) {
+        return SDL_FALSE;
+    }
+
+    data = (SDL_DisplayModeData *) SDL_malloc(sizeof(*data));
+    if (!data) {
+        return SDL_FALSE;
+    }
+    SDL_memcpy(data->DeviceName, deviceName, sizeof(data->DeviceName));
+    data->DeviceMode = devmode;
+    data->DeviceMode.dmFields =
+        (DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFREQUENCY |
+         DM_DISPLAYFLAGS);
+
+    /* Fill in the mode information */
+    mode->format = SDL_PixelFormat_Unknown;
+    mode->w = devmode.dmPelsWidth;
+    mode->h = devmode.dmPelsHeight;
+    mode->refresh_rate = devmode.dmDisplayFrequency;
+    mode->driverdata = data;
+
+    hdc = CreateDC(deviceName, NULL, NULL, &devmode);
+    if (hdc) {
+        char bmi_data[sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD)];
+        LPBITMAPINFO bmi;
+        HBITMAP hbm;
+
+        SDL_zero(bmi_data);
+        bmi = (LPBITMAPINFO) bmi_data;
+        bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+
+        hbm = CreateCompatibleBitmap(hdc, 1, 1);
+        GetDIBits(hdc, hbm, 0, 1, NULL, bmi, DIB_RGB_COLORS);
+        GetDIBits(hdc, hbm, 0, 1, NULL, bmi, DIB_RGB_COLORS);
+        DeleteObject(hbm);
+        DeleteDC(hdc);
+        if (bmi->bmiHeader.biCompression == BI_BITFIELDS) {
+            switch (*(Uint32 *) bmi->bmiColors) {
+            case 0x00FF0000:
+                mode->format = SDL_PixelFormat_RGB888;
+                break;
+            case 0x000000FF:
+                mode->format = SDL_PixelFormat_BGR888;
+                break;
+            case 0xF800:
+                mode->format = SDL_PixelFormat_RGB565;
+                break;
+            case 0x7C00:
+                mode->format = SDL_PixelFormat_RGB555;
+                break;
+            }
+        } else if (bmi->bmiHeader.biBitCount == 8) {
+            mode->format = SDL_PixelFormat_Index8;
+        }
+    } else {
+        switch (devmode.dmBitsPerPel) {
+        case 32:
+            mode->format = SDL_PixelFormat_RGB888;
+            break;
+        case 24:
+            mode->format = SDL_PixelFormat_RGB24;
+            break;
+        case 16:
+            mode->format = SDL_PixelFormat_RGB565;
+            break;
+        case 15:
+            mode->format = SDL_PixelFormat_RGB555;
+            break;
+        case 8:
+            mode->format = SDL_PixelFormat_Index8;
+            break;
+        }
+    }
+    return SDL_TRUE;
+}
+
+void
+WIN_InitModes(_THIS)
+{
+    SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
+    DWORD i, j;
+    DISPLAY_DEVICE device;
+
+    device.cb = sizeof(device);
+    for (i = 0;; ++i) {
+        TCHAR DeviceName[32];
+
+        if (!EnumDisplayDevices(NULL, i, &device, 0)) {
+            break;
+        }
+        if (!(device.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)) {
+            continue;
+        }
+        SDL_memcpy(DeviceName, device.DeviceName, sizeof(DeviceName));
+#ifdef DEBUG_MODES
+        printf("Device: %s\n", WIN_StringToUTF8(DeviceName));
+#endif
+        for (j = 0;; ++j) {
+            SDL_VideoDisplay display;
+            SDL_DisplayData *displaydata;
+            SDL_DisplayMode mode;
+
+            if (!EnumDisplayDevices(DeviceName, j, &device, 0)) {
+                break;
+            }
+            if (!(device.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)) {
+                continue;
+            }
+#ifdef DEBUG_MODES
+            printf("Monitor: %s\n", WIN_StringToUTF8(device.DeviceName));
+#endif
+            if (!WIN_GetDisplayMode(DeviceName, ENUM_CURRENT_SETTINGS, &mode)) {
+                break;
+            }
+
+            displaydata =
+                (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata));
+            if (!displaydata) {
+                continue;
+            }
+            SDL_memcpy(displaydata->DeviceName, DeviceName,
+                       sizeof(DeviceName));
+
+            SDL_zero(display);
+            display.desktop_mode = mode;
+            display.current_mode = mode;
+            display.driverdata = displaydata;
+            SDL_AddVideoDisplay(&display);
+        }
+    }
+}
+
+void
+WIN_GetDisplayModes(_THIS)
+{
+    SDL_DisplayData *data = (SDL_DisplayData *) SDL_CurrentDisplay.driverdata;
+    DWORD i;
+    SDL_DisplayMode mode;
+
+    for (i = 0;; ++i) {
+        if (!WIN_GetDisplayMode(data->DeviceName, i, &mode)) {
+            break;
+        }
+        if (!SDL_AddDisplayMode(_this->current_display, &mode)) {
+            SDL_free(mode.driverdata);
+        }
+    }
+}
+
+int
+WIN_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
+{
+    SDL_DisplayModeData *data = (SDL_DisplayModeData *) mode->driverdata;
+    LONG status;
+
+    status =
+        ChangeDisplaySettingsEx(data->DeviceName, &data->DeviceMode, NULL,
+                                CDS_FULLSCREEN, NULL);
+    if (status == DISP_CHANGE_SUCCESSFUL) {
+        return 0;
+    } else {
+        const char *reason = "Unknown reason";
+        switch (status) {
+        case DISP_CHANGE_BADFLAGS:
+            reason = "DISP_CHANGE_BADFLAGS";
+            break;
+        case DISP_CHANGE_BADMODE:
+            reason = "DISP_CHANGE_BADMODE";
+            break;
+        case DISP_CHANGE_BADPARAM:
+            reason = "DISP_CHANGE_BADPARAM";
+            break;
+        case DISP_CHANGE_FAILED:
+            reason = "DISP_CHANGE_FAILED";
+            break;
+        }
+        SDL_SetError("ChangeDisplaySettingsEx() failed: %s", reason);
+        return -1;
+    }
+}
+
+void
+WIN_QuitModes(_THIS)
+{
+    ChangeDisplaySettingsEx(NULL, NULL, NULL, 0, NULL);
+}
+
+/* vi: set ts=4 sw=4 expandtab: */