You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
2.5 KiB
85 lines
2.5 KiB
//---------------------------------------------------------------------------
|
|
// BmpCache.cpp - single bitmap/hdc cache object for uxtheme
|
|
//---------------------------------------------------------------------------
|
|
#include "stdafx.h"
|
|
#include "BmpCache.h"
|
|
//---------------------------------------------------------------------------
|
|
CBitmapCache::CBitmapCache()
|
|
{
|
|
_hBitmap = NULL;
|
|
|
|
_iWidth = 0;
|
|
_iHeight = 0;
|
|
|
|
ZeroMemory(&_csBitmapCache, sizeof(_csBitmapCache));
|
|
if( !InitializeCriticalSectionAndSpinCount(&_csBitmapCache, 0) )
|
|
{
|
|
ASSERT(!VALID_CRITICALSECTION(&_csBitmapCache));
|
|
}
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
CBitmapCache::~CBitmapCache()
|
|
{
|
|
if (_hBitmap)
|
|
{
|
|
DeleteObject(_hBitmap);
|
|
}
|
|
|
|
SAFE_DELETECRITICALSECTION(&_csBitmapCache);
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
HBITMAP CBitmapCache::AcquireBitmap(HDC hdc, int iWidth, int iHeight)
|
|
{
|
|
SAFE_ENTERCRITICALSECTION(&_csBitmapCache);
|
|
|
|
if ((iWidth > _iWidth) || (iHeight > _iHeight) || (! _hBitmap))
|
|
{
|
|
if (_hBitmap)
|
|
{
|
|
DeleteObject(_hBitmap);
|
|
|
|
_hBitmap = NULL;
|
|
_iWidth = 0;
|
|
_iHeight = 0;
|
|
}
|
|
|
|
//---- create new bitmap & hdc ----
|
|
struct {
|
|
BITMAPINFOHEADER bmih;
|
|
ULONG masks[3];
|
|
} bmi;
|
|
|
|
bmi.bmih.biSize = sizeof(bmi.bmih);
|
|
bmi.bmih.biWidth = iWidth;
|
|
bmi.bmih.biHeight = iHeight;
|
|
bmi.bmih.biPlanes = 1;
|
|
bmi.bmih.biBitCount = 32;
|
|
bmi.bmih.biCompression = BI_BITFIELDS;
|
|
bmi.bmih.biSizeImage = 0;
|
|
bmi.bmih.biXPelsPerMeter = 0;
|
|
bmi.bmih.biYPelsPerMeter = 0;
|
|
bmi.bmih.biClrUsed = 3;
|
|
bmi.bmih.biClrImportant = 0;
|
|
bmi.masks[0] = 0xff0000; // red
|
|
bmi.masks[1] = 0x00ff00; // green
|
|
bmi.masks[2] = 0x0000ff; // blue
|
|
|
|
_hBitmap = CreateDIBitmap(hdc, &bmi.bmih, CBM_CREATEDIB , NULL, (BITMAPINFO*)&bmi.bmih,
|
|
DIB_RGB_COLORS);
|
|
|
|
if (_hBitmap)
|
|
{
|
|
_iWidth = iWidth;
|
|
_iHeight = iHeight;
|
|
}
|
|
}
|
|
|
|
return _hBitmap;
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
void CBitmapCache::ReturnBitmap()
|
|
{
|
|
SAFE_LEAVECRITICALSECTION(&_csBitmapCache);
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|