src/video/win32/SDL_win32modes.c
author Sam Lantinga <slouken@libsdl.org>
Sun, 09 Jul 2006 09:02:26 +0000
branchSDL-1.3
changeset 1733 0b1070f2f94d
parent 1725 98a3207ddde8
child 1735 8dd28c4ef746
permissions -rw-r--r--
Implemented gamma correction on Windows. Added general code to restore the video mode and gamma when windows lose focus.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#include "SDL_win32video.h"
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/* FIXME: Each call to EnumDisplaySettings() takes about 6 ms on my laptop.
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          With 500 or so modes, this takes almost 3 seconds to run!
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*/
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static SDL_bool
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WIN_GetDisplayMode(LPCTSTR deviceName, DWORD index, SDL_DisplayMode * mode)
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{
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    SDL_DisplayModeData *data;
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    DEVMODE devmode;
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    HDC hdc;
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    devmode.dmSize = sizeof(devmode);
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    devmode.dmDriverExtra = 0;
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    if (!EnumDisplaySettings(deviceName, index, &devmode)) {
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        return SDL_FALSE;
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    }
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    data = (SDL_DisplayModeData *) SDL_malloc(sizeof(*data));
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    if (!data) {
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        return SDL_FALSE;
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    }
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    SDL_memcpy(data->DeviceName, deviceName, sizeof(data->DeviceName));
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    data->DeviceMode = devmode;
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    data->DeviceMode.dmFields =
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        (DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFREQUENCY |
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         DM_DISPLAYFLAGS);
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    /* Fill in the mode information */
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    mode->format = SDL_PixelFormat_Unknown;
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    mode->w = devmode.dmPelsWidth;
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    mode->h = devmode.dmPelsHeight;
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    mode->refresh_rate = devmode.dmDisplayFrequency;
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    mode->driverdata = data;
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    hdc = CreateDC(deviceName, NULL, NULL, &devmode);
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    if (hdc) {
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        char bmi_data[sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD)];
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        LPBITMAPINFO bmi;
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        HBITMAP hbm;
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        SDL_zero(bmi_data);
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        bmi = (LPBITMAPINFO) bmi_data;
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        bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
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        hbm = CreateCompatibleBitmap(hdc, 1, 1);
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        GetDIBits(hdc, hbm, 0, 1, NULL, bmi, DIB_RGB_COLORS);
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        GetDIBits(hdc, hbm, 0, 1, NULL, bmi, DIB_RGB_COLORS);
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        DeleteObject(hbm);
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        DeleteDC(hdc);
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        if (bmi->bmiHeader.biCompression == BI_BITFIELDS) {
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            switch (*(Uint32 *) bmi->bmiColors) {
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            case 0x00FF0000:
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                mode->format = SDL_PixelFormat_RGB888;
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                break;
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            case 0x000000FF:
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                mode->format = SDL_PixelFormat_BGR888;
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                break;
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            case 0xF800:
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                mode->format = SDL_PixelFormat_RGB565;
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                break;
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            case 0x7C00:
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                mode->format = SDL_PixelFormat_RGB555;
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                break;
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            }
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        } else if (bmi->bmiHeader.biBitCount == 8) {
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            mode->format = SDL_PixelFormat_Index8;
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        }
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    } else {
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        switch (devmode.dmBitsPerPel) {
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        case 32:
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            mode->format = SDL_PixelFormat_RGB888;
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            break;
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        case 24:
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            mode->format = SDL_PixelFormat_RGB24;
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            break;
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        case 16:
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            mode->format = SDL_PixelFormat_RGB565;
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            break;
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        case 15:
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            mode->format = SDL_PixelFormat_RGB555;
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            break;
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        case 8:
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            mode->format = SDL_PixelFormat_Index8;
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            break;
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        }
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    }
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    return SDL_TRUE;
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}
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void
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WIN_InitModes(_THIS)
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{
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    SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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    DWORD i, j;
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    DISPLAY_DEVICE device;
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    device.cb = sizeof(device);
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    for (i = 0;; ++i) {
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        TCHAR DeviceName[32];
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        if (!EnumDisplayDevices(NULL, i, &device, 0)) {
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            break;
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        }
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        if (!(device.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)) {
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            continue;
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        }
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        SDL_memcpy(DeviceName, device.DeviceName, sizeof(DeviceName));
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#ifdef DEBUG_MODES
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        printf("Device: %s\n", WIN_StringToUTF8(DeviceName));
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#endif
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        for (j = 0;; ++j) {
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            int index;
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            SDL_VideoDisplay display;
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            SDL_DisplayData *displaydata;
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            SDL_DisplayMode mode;
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            if (!EnumDisplayDevices(DeviceName, j, &device, 0)) {
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                break;
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            }
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            if (!(device.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)) {
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                continue;
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            }
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#ifdef DEBUG_MODES
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            printf("Monitor: %s\n", WIN_StringToUTF8(device.DeviceName));
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#endif
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            if (!WIN_GetDisplayMode(DeviceName, ENUM_CURRENT_SETTINGS, &mode)) {
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                break;
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            }
1733
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            displaydata =
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                (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata));
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            if (!displaydata) {
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                continue;
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            }
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            SDL_memcpy(displaydata->DeviceName, DeviceName,
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                       sizeof(DeviceName));
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1725
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            SDL_zero(display);
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            display.desktop_mode = mode;
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            display.current_mode = mode;
1733
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            display.driverdata = displaydata;
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            SDL_AddVideoDisplay(&display);
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   169
        }
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    }
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   171
}
1725
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1733
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void
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   174
WIN_GetDisplayModes(_THIS)
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{
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    SDL_DisplayData *data = (SDL_DisplayData *) SDL_CurrentDisplay.driverdata;
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    DWORD i;
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    SDL_DisplayMode mode;
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   179
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   180
    for (i = 0;; ++i) {
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   181
        if (!WIN_GetDisplayMode(data->DeviceName, i, &mode)) {
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   182
            break;
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diff changeset
   183
        }
0b1070f2f94d Implemented gamma correction on Windows.
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   184
        if (!SDL_AddDisplayMode(_this->current_display, &mode)) {
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   185
            SDL_free(mode.driverdata);
1725
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   186
        }
98a3207ddde8 Implemented Win32 video mode support
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   187
    }
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   188
}
98a3207ddde8 Implemented Win32 video mode support
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   189
98a3207ddde8 Implemented Win32 video mode support
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   190
int
98a3207ddde8 Implemented Win32 video mode support
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   191
WIN_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
98a3207ddde8 Implemented Win32 video mode support
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   192
{
98a3207ddde8 Implemented Win32 video mode support
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diff changeset
   193
    SDL_DisplayModeData *data = (SDL_DisplayModeData *) mode->driverdata;
98a3207ddde8 Implemented Win32 video mode support
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diff changeset
   194
    LONG status;
98a3207ddde8 Implemented Win32 video mode support
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diff changeset
   195
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   196
    status =
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   197
        ChangeDisplaySettingsEx(data->DeviceName, &data->DeviceMode, NULL,
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   198
                                CDS_FULLSCREEN, NULL);
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   199
    if (status == DISP_CHANGE_SUCCESSFUL) {
98a3207ddde8 Implemented Win32 video mode support
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diff changeset
   200
        return 0;
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   201
    } else {
98a3207ddde8 Implemented Win32 video mode support
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diff changeset
   202
        const char *reason = "Unknown reason";
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   203
        switch (status) {
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   204
        case DISP_CHANGE_BADFLAGS:
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   205
            reason = "DISP_CHANGE_BADFLAGS";
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   206
            break;
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   207
        case DISP_CHANGE_BADMODE:
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   208
            reason = "DISP_CHANGE_BADMODE";
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   209
            break;
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   210
        case DISP_CHANGE_BADPARAM:
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   211
            reason = "DISP_CHANGE_BADPARAM";
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   212
            break;
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   213
        case DISP_CHANGE_FAILED:
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   214
            reason = "DISP_CHANGE_FAILED";
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   215
            break;
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   216
        }
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   217
        SDL_SetError("ChangeDisplaySettingsEx() failed: %s", reason);
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   218
        return -1;
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   219
    }
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   220
}
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   221
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   222
void
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   223
WIN_QuitModes(_THIS)
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   224
{
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   225
    ChangeDisplaySettingsEx(NULL, NULL, NULL, 0, NULL);
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   226
}
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   227
98a3207ddde8 Implemented Win32 video mode support
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   228
/* vi: set ts=4 sw=4 expandtab: */