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James Russell
2026-04-03 00:22:39 -05:00
commit eca1e8c458
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libsst-wm/Win32/SST_WMRender_Win32.c Normal file
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/*
SST_WMRender_Win32.c
Author: Patrick Baggett <ptbaggett@762studios.com>
Created: 9/19/2012
Purpose:
Software rendering support (Win32)
License:
This program is free software. It comes without any warranty, to
the extent permitted by applicable law. You can redistribute it
and/or modify it under the terms of the Do What The Fuck You Want
To Public License, Version 2, as published by Sam Hocevar. See
http://sam.zoy.org/wtfpl/COPYING for more details.
*/
#include "Win32Private.h"
#include "../APIPrivate.h"
#include <SST/SST_WMWindow.h>
/*************************************************************************/
static int Win32_EnableSoftwareRendering(SST_Window window)
{
SST_Window_Win32* win = (SST_Window_Win32*)window;
HDC hDC;
HDC hDCTmp;
HBITMAP hBMP;
RECT r;
hDCTmp = GetDC(win->hWnd);
hDC = CreateCompatibleDC(hDCTmp);
if(GetDeviceCaps(hDCTmp, BITSPIXEL) != 32)
{
DeleteDC(hDC);
return 0;
}
GetClientRect(win->hWnd, &r);
hBMP = CreateCompatibleBitmap(hDCTmp, r.right, r.bottom);
SelectObject(hDC, hBMP);
ReleaseDC(win->hWnd, hDCTmp);
win->softwareDC = hDC;
win->softwareImage = hBMP;
win->softwareBackbuffer = HeapAlloc(GetProcessHeap(), 0, (SIZE_T)r.right * (SIZE_T)r.bottom * 4);
win->softwarePitch = r.right * 4;
return 1;
}
/*************************************************************************/
static void Win32_DisableSoftwareRendering(SST_Window window)
{
SST_Window_Win32* win = (SST_Window_Win32*)window;
if(win->softwareBackbuffer)
HeapFree(GetProcessHeap(), 0, win->softwareBackbuffer);
if(win->softwareDC)
DeleteDC(win->softwareDC);
if(win->softwareImage)
DeleteObject(win->softwareImage);
}
/*************************************************************************/
static void* Win32_LockBackbuffer(SST_Window window, size_t* pitchReturn)
{
SST_Window_Win32* win = (SST_Window_Win32*)window;
*pitchReturn = win->softwarePitch;
return win->softwareBackbuffer;
}
/*************************************************************************/
static void Win32_UnlockBackbuffer(SST_Window window)
{
SST_Window_Win32* win = (SST_Window_Win32*)window;
InvalidateRect(win->hWnd, NULL, FALSE);
UpdateWindow(win->hWnd);
}
struct SST_WM_RenderFuncs Win32_RenderFuncs = {
Win32_EnableSoftwareRendering,
Win32_DisableSoftwareRendering,
Win32_LockBackbuffer,
Win32_UnlockBackbuffer
};