LRESULT CAboutDlg::OnEraseBackground(UINT /*uMsg*/, WPARAM wParam, LPARAM /*lParam*/, BOOL& /*bHandled*/)
{
/*
HBITMAP hPicture = LoadBitmap(_Module.GetModuleInstance(), MAKEINTRESOURCE(IDB_LOGO));
BITMAP bm;
GetObject(hPicture, sizeof (BITMAP), (LPSTR)&bm);
CMemDC memdc((HDC)wParam, NULL);
HDC hdcCompatible = CreateCompatibleDC(memdc);
HBITMAP hOldBMP = (HBITMAP)SelectObject(hdcCompatible, hPicture);
RECT rcClient;
GetClientRect(&rcClient);
memdc.FillSolidRect(&rcClient, GetSysColor(COLOR_3DFACE));
memdc.TransparentBlt(107-bm.bmWidth/2, 116-bm.bmHeight/2, bm.bmWidth, bm.bmHeight, hdcCompatible,
0, 0, bm.bmWidth, bm.bmHeight, 0xff00ff);
SelectObject(hdcCompatible, hOldBMP);
DeleteDC(hdcCompatible);
DeleteObject(hPicture);
/*/
CImage Image;
LoadImage(&Image, _Module.GetModuleInstance(), IDB_LOGO);
CMemDC memdc((HDC)wParam, NULL);
RECT rcClient;
GetClientRect(&rcClient);
memdc.FillRect(&rcClient, COLOR_3DFACE);
Image.AlphaBlend(memdc, 107-Image.GetWidth()/2, 116-Image.GetHeight()/2, Image.GetWidth(), Image.GetHeight(), 0, 0, Image.GetWidth(), Image.GetHeight());
/**/
return 0;
}
static void BlendSelSign( CImage &back, const RectF &render_rect, int sel )
{
CFileListManager &file_manager = GetInst( CFileListManager );
CImage img;
CreateImgFromBuffer( file_manager.GetSelSign( sel ), img );
PointF render_pos = GetRandPosInULRect( img.GetWidth(), img.GetHeight(), render_rect );
back.AlphaBlend( &img, render_pos.X, render_pos.Y, 1.0f );
}
static void GenSmallImage( int img_count, CImage &back, const RectF &render_rect, int sel, CImage &img_alpha )
{
#define RAND_ALPHA ( ( 130 + random( 50 ) ) / 255.0f )
#define ROT_ANGLE ( random( 20 ) + 160 )
if( img_count < 1 )
{
return ;
}
CFileListManager &file_manager = GetInst( CFileListManager );
const Range &alpha_r = GetInst( CConfiger ).GetSystem().AnswerAlphaRange;
float fAnswerAlpha = ( random( alpha_r.second - alpha_r.first ) + alpha_r.first ) / 255.0f;
CImage img_first;
CreateImgFromBuffer( file_manager.GetRandSmall(), img_first, true );
float fFirstRot = ROT_ANGLE;
float fFirstAlpha = RAND_ALPHA;
PointF pos = RotateImage( img_first, img_alpha, img_count == 1 ? ( random( 60 ) - 30.0f ) : fFirstRot );
PointF render_pos = GetRandPosInULRect( img_first.GetWidth(), img_first.GetHeight(), render_rect );
RectF img_rect( render_pos.X + 20, render_pos.Y + 20, img_first.GetWidth() - 40, img_first.GetHeight() - 40 );
back.AlphaBlend( &img_first, render_pos.X, render_pos.Y,
img_count == 1 ? fAnswerAlpha : fFirstAlpha );
CImage *img_cover = NULL;
PointF rot_pos = GetRotPos( img_alpha, pos );
float fRotQuo = 20.0f;
float fAlphaQuo = -0.08f;
for( int i = 1; i < img_count; ++ i, fRotQuo += fRotQuo, fAlphaQuo += fAlphaQuo )
{
img_cover = MP_NEW CImage();
CreateImgFromBuffer( file_manager.GetRandSmall(), *img_cover, true );
img_cover->RotateEx( fFirstRot + fRotQuo, rot_pos.X, rot_pos.Y );
img_cover->SetAlphaMap( &img_alpha, pos.X, pos.Y );
back.AlphaBlend( img_cover, render_pos.X, render_pos.Y, fFirstAlpha + fAlphaQuo );
MP_DELETE(img_cover);
}
BlendSelSign( back, img_rect, sel );
}
CQuestionManager::Question CQuestionManager::GenOneQuestion()
{
Question ques = { { 0 }, 0 };
CFileListManager &file_manager = GetInst( CFileListManager );
int r = 0;
// alpha image
CImage img_alpha;
CreateImgFromBuffer( file_manager.GetAlpha(), img_alpha );
// 1.generate the background.
CImage back;
CreateImgFromBuffer( file_manager.GetRandBack(), back );
r = random( 3 );
CImage *img_cover;
for( int i = 0; i < r; ++ i )
{
img_cover = MP_NEW CImage();
CreateImgFromBuffer( file_manager.GetRandBack(), *img_cover );
back.AlphaBlend( img_cover, 0, 0, ( random( 55 ) + 100 ) / 255.0f );
MP_DELETE(img_cover);
}
// 2.generate small pictures.
ques.answer = BlendSmallImage( back, img_alpha );
// 3.covert the image to raw buffer.
if( !back.ExportJpegToMemory( (BYTE*&) ques.data.buf, (DWORD&) ques.data.size, 85 ) )
{
ques.data.buf = 0;
ques.data.size = 0;
PutoutLog( LOG_FILE, LT_ERROR, "Export jpeg failed." );
}
DumpImage( &back );
return ques;
}
