diff options
Diffstat (limited to '3rdparty/SDL2/src/video/windows/SDL_windowsframebuffer.c')
-rw-r--r-- | 3rdparty/SDL2/src/video/windows/SDL_windowsframebuffer.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/3rdparty/SDL2/src/video/windows/SDL_windowsframebuffer.c b/3rdparty/SDL2/src/video/windows/SDL_windowsframebuffer.c new file mode 100644 index 00000000000..7bb07ed2eca --- /dev/null +++ b/3rdparty/SDL2/src/video/windows/SDL_windowsframebuffer.c @@ -0,0 +1,127 @@ +/* + 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: */ |