| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "../../SDL_internal.h" |
| |
| #if SDL_VIDEO_DRIVER_WINDOWS |
| |
| #include "SDL_windowsvideo.h" |
| |
| int WIN_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format, void ** pixels, int *pitch) |
| { |
| SDL_WindowData *data = (SDL_WindowData *) window->driverdata; |
| size_t size; |
| LPBITMAPINFO info; |
| HBITMAP hbm; |
| |
| /* Free the old framebuffer surface */ |
| if (data->mdc) { |
| DeleteDC(data->mdc); |
| } |
| if (data->hbm) { |
| DeleteObject(data->hbm); |
| } |
| |
| /* Find out the format of the screen */ |
| size = sizeof(BITMAPINFOHEADER) + 256 * sizeof (RGBQUAD); |
| info = (LPBITMAPINFO)SDL_stack_alloc(Uint8, size); |
| if (!info) { |
| return SDL_OutOfMemory(); |
| } |
| |
| SDL_memset(info, 0, size); |
| info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); |
| |
| /* The second call to GetDIBits() fills in the bitfields */ |
| hbm = CreateCompatibleBitmap(data->hdc, 1, 1); |
| GetDIBits(data->hdc, hbm, 0, 0, NULL, info, DIB_RGB_COLORS); |
| GetDIBits(data->hdc, hbm, 0, 0, NULL, info, DIB_RGB_COLORS); |
| DeleteObject(hbm); |
| |
| *format = SDL_PIXELFORMAT_UNKNOWN; |
| if (info->bmiHeader.biCompression == BI_BITFIELDS) { |
| int bpp; |
| Uint32 *masks; |
| |
| bpp = info->bmiHeader.biPlanes * info->bmiHeader.biBitCount; |
| masks = (Uint32*)((Uint8*)info + info->bmiHeader.biSize); |
| *format = SDL_MasksToPixelFormatEnum(bpp, masks[0], masks[1], masks[2], 0); |
| } |
| if (*format == SDL_PIXELFORMAT_UNKNOWN) |
| { |
| /* We'll use RGB format for now */ |
| *format = SDL_PIXELFORMAT_RGB888; |
| |
| /* Create a new one */ |
| SDL_memset(info, 0, size); |
| info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); |
| info->bmiHeader.biPlanes = 1; |
| info->bmiHeader.biBitCount = 32; |
| info->bmiHeader.biCompression = BI_RGB; |
| } |
| |
| /* Fill in the size information */ |
| *pitch = (((window->w * SDL_BYTESPERPIXEL(*format)) + 3) & ~3); |
| info->bmiHeader.biWidth = window->w; |
| info->bmiHeader.biHeight = -window->h; /* negative for topdown bitmap */ |
| info->bmiHeader.biSizeImage = window->h * (*pitch); |
| |
| data->mdc = CreateCompatibleDC(data->hdc); |
| data->hbm = CreateDIBSection(data->hdc, info, DIB_RGB_COLORS, pixels, NULL, 0); |
| SDL_stack_free(info); |
| |
| if (!data->hbm) { |
| return WIN_SetError("Unable to create DIB"); |
| } |
| SelectObject(data->mdc, data->hbm); |
| |
| return 0; |
| } |
| |
| int WIN_UpdateWindowFramebuffer(_THIS, SDL_Window * window, const SDL_Rect * rects, int numrects) |
| { |
| SDL_WindowData *data = (SDL_WindowData *) window->driverdata; |
| |
| BitBlt(data->hdc, 0, 0, window->w, window->h, data->mdc, 0, 0, SRCCOPY); |
| return 0; |
| } |
| |
| void WIN_DestroyWindowFramebuffer(_THIS, SDL_Window * window) |
| { |
| SDL_WindowData *data = (SDL_WindowData *) window->driverdata; |
| |
| if (!data) { |
| /* The window wasn't fully initialized */ |
| return; |
| } |
| |
| if (data->mdc) { |
| DeleteDC(data->mdc); |
| data->mdc = NULL; |
| } |
| if (data->hbm) { |
| DeleteObject(data->hbm); |
| data->hbm = NULL; |
| } |
| } |
| |
| #endif /* SDL_VIDEO_DRIVER_WINDOWS */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |