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Added the Windows framebuffer implementation.

This actually ends up being faster than Direct3D with a dynamic texture. (???)
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slouken committed Feb 4, 2011
1 parent 8dd683a commit da111d49bf989ef48d7b39f3b26d1580b8230952
@@ -0,0 +1,90 @@
/*
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: */
@@ -0,0 +1,28 @@
/*
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"

extern int WIN_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format, void ** pixels, int *pitch);
extern int WIN_UpdateWindowFramebuffer(_THIS, SDL_Window * window, int numrects, SDL_Rect * rects);
extern void WIN_DestroyWindowFramebuffer(_THIS, SDL_Window * window);

/* vi: set ts=4 sw=4 expandtab: */
@@ -28,6 +28,7 @@
#include "../SDL_pixels_c.h"

#include "SDL_windowsvideo.h"
#include "SDL_windowsframebuffer.h"
#include "SDL_windowsshape.h"

/* Initialization/Query functions */
@@ -128,6 +129,9 @@ WIN_CreateDevice(int devindex)
device->SetWindowGrab = WIN_SetWindowGrab;
device->DestroyWindow = WIN_DestroyWindow;
device->GetWindowWMInfo = WIN_GetWindowWMInfo;
device->CreateWindowFramebuffer = WIN_CreateWindowFramebuffer;
device->UpdateWindowFramebuffer = WIN_UpdateWindowFramebuffer;
device->DestroyWindowFramebuffer = WIN_DestroyWindowFramebuffer;

device->shape_driver.CreateShaper = Win32_CreateShaper;
device->shape_driver.SetWindowShape = Win32_SetWindowShape;
@@ -38,6 +38,8 @@ typedef struct
SDL_Window *window;
HWND hwnd;
HDC hdc;
HDC mdc;
HBITMAP hbm;
WNDPROC wndproc;
SDL_bool created;
int mouse_pressed;

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