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Added the Windows framebuffer implementation.

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This actually ends up being faster than Direct3D with a dynamic texture. (???)
This commit is contained in:
Sam Lantinga 2011-02-04 12:29:58 -08:00
parent f5569d20c7
commit d9aa583921
4 changed files with 124 additions and 0 deletions
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90
src/video/windows/SDL_windowsframebuffer.c Executable file
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2010 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_windowsvideo.h"
int WIN_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format, void ** pixels, int *pitch)
{
SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
BITMAPINFO info;
/* Free the old framebuffer surface */
if (data->mdc) {
DeleteDC(data->mdc);
}
if (data->hbm) {
DeleteObject(data->hbm);
}
/* We'll use RGB format for now */
*format = SDL_PIXELFORMAT_RGB888;
*pitch = (((window->w * SDL_BYTESPERPIXEL(*format)) + 3) & ~3);
/* Create a new one */
info.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
info.bmiHeader.biWidth = window->w;
info.bmiHeader.biHeight = -window->h; /* negative for topdown bitmap */
info.bmiHeader.biPlanes = 1;
info.bmiHeader.biBitCount = 32;
info.bmiHeader.biCompression = BI_RGB;
info.bmiHeader.biSizeImage = window->h * (*pitch);
info.bmiHeader.biXPelsPerMeter = 0;
info.bmiHeader.biYPelsPerMeter = 0;
info.bmiHeader.biClrUsed = 0;
info.bmiHeader.biClrImportant = 0;
data->mdc = CreateCompatibleDC(data->hdc);
data->hbm = CreateDIBSection(data->hdc, &info, DIB_RGB_COLORS, pixels, NULL, 0);
if (!data->hbm) {
WIN_SetError("Unable to create DIB");
return -1;
}
SelectObject(data->mdc, data->hbm);
return 0;
}
int WIN_UpdateWindowFramebuffer(_THIS, SDL_Window * window, int numrects, SDL_Rect * rects)
{
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->mdc) {
DeleteDC(data->mdc);
data->mdc = NULL;
}
if (data->hbm) {
DeleteObject(data->hbm);
data->hbm = NULL;
}
}
/* vi: set ts=4 sw=4 expandtab: */