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axmol/cocos2dx/platform/win32/CCImage.cpp

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/****************************************************************************
Copyright (c) 2010 cocos2d-x.org
http://www.cocos2d-x.org
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#define __CC_PLATFORM_IMAGE_CPP__
#include "platform/CCImageCommon_cpp.h"
NS_CC_BEGIN
/**
@brief A memory DC which uses to draw text on bitmap.
*/
class BitmapDC
{
public:
BitmapDC(HWND hWnd = NULL)
: m_hDC(NULL)
, m_hBmp(NULL)
, m_hFont((HFONT)GetStockObject(DEFAULT_GUI_FONT))
, m_hWnd(NULL)
{
m_hWnd = hWnd;
HDC hdc = GetDC(hWnd);
m_hDC = CreateCompatibleDC(hdc);
ReleaseDC(hWnd, hdc);
}
~BitmapDC()
{
prepareBitmap(0, 0);
if (m_hDC)
{
DeleteDC(m_hDC);
}
HFONT hDefFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
if (hDefFont != m_hFont)
{
DeleteObject(m_hFont);
m_hFont = hDefFont;
}
// release temp font resource
if (m_curFontPath.size() > 0)
{
wchar_t * pwszBuffer = utf8ToUtf16(m_curFontPath);
if (pwszBuffer)
{
RemoveFontResource(pwszBuffer);
SendMessage( m_hWnd, WM_FONTCHANGE, 0, 0);
delete [] pwszBuffer;
pwszBuffer = NULL;
}
}
}
wchar_t * utf8ToUtf16(std::string nString)
{
wchar_t * pwszBuffer = NULL;
do
{
if (nString.size() < 0)
{
break;
}
// utf-8 to utf-16
int nLen = nString.size();
int nBufLen = nLen + 1;
pwszBuffer = new wchar_t[nBufLen];
CC_BREAK_IF(! pwszBuffer);
memset(pwszBuffer,0,nBufLen);
nLen = MultiByteToWideChar(CP_UTF8, 0, nString.c_str(), nLen, pwszBuffer, nBufLen);
pwszBuffer[nLen] = '\0';
} while (0);
return pwszBuffer;
}
bool setFont(const char * pFontName = NULL, int nSize = 0)
{
bool bRet = false;
do
{
std::string fontName = pFontName;
std::string fontPath;
HFONT hDefFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
LOGFONTA tNewFont = {0};
LOGFONTA tOldFont = {0};
GetObjectA(hDefFont, sizeof(tNewFont), &tNewFont);
if (fontName.c_str())
{
// create font from ttf file
int nFindttf = fontName.find(".ttf");
int nFindTTF = fontName.find(".TTF");
if (nFindttf >= 0 || nFindTTF >= 0)
{
fontPath = CCFileUtils::sharedFileUtils()->fullPathForFilename(fontName.c_str());
int nFindPos = fontName.rfind("/");
fontName = &fontName[nFindPos+1];
nFindPos = fontName.rfind(".");
fontName = fontName.substr(0,nFindPos);
}
tNewFont.lfCharSet = DEFAULT_CHARSET;
strcpy_s(tNewFont.lfFaceName, LF_FACESIZE, fontName.c_str());
}
if (nSize)
{
tNewFont.lfHeight = -nSize;
}
GetObjectA(m_hFont, sizeof(tOldFont), &tOldFont);
if (tOldFont.lfHeight == tNewFont.lfHeight
&& 0 == strcmp(tOldFont.lfFaceName, tNewFont.lfFaceName))
{
// already has the font
bRet = true;
break;
}
// delete old font
if (m_hFont != hDefFont)
{
DeleteObject(m_hFont);
// release old font register
if (m_curFontPath.size() > 0)
{
wchar_t * pwszBuffer = utf8ToUtf16(m_curFontPath);
if (pwszBuffer)
{
if(RemoveFontResource(pwszBuffer))
{
SendMessage( m_hWnd, WM_FONTCHANGE, 0, 0);
}
delete [] pwszBuffer;
pwszBuffer = NULL;
}
}
if (fontPath.size() > 0)
m_curFontPath = fontPath;
else
m_curFontPath.clear();
// register temp font
if (m_curFontPath.size() > 0)
{
wchar_t * pwszBuffer = utf8ToUtf16(m_curFontPath);
if (pwszBuffer)
{
if(AddFontResource(pwszBuffer))
{
SendMessage( m_hWnd, WM_FONTCHANGE, 0, 0);
}
delete [] pwszBuffer;
pwszBuffer = NULL;
}
}
}
m_hFont = NULL;
// disable Cleartype
tNewFont.lfQuality = ANTIALIASED_QUALITY;
// create new font
m_hFont = CreateFontIndirectA(&tNewFont);
if (! m_hFont)
{
// create failed, use default font
m_hFont = hDefFont;
break;
}
bRet = true;
} while (0);
return bRet;
}
SIZE sizeWithText(const wchar_t * pszText, int nLen, DWORD dwFmt, LONG nWidthLimit)
{
SIZE tRet = {0};
do
{
CC_BREAK_IF(! pszText || nLen <= 0);
RECT rc = {0, 0, 0, 0};
DWORD dwCalcFmt = DT_CALCRECT;
if (nWidthLimit > 0)
{
rc.right = nWidthLimit;
dwCalcFmt |= DT_WORDBREAK
| (dwFmt & DT_CENTER)
| (dwFmt & DT_RIGHT);
}
// use current font to measure text extent
HGDIOBJ hOld = SelectObject(m_hDC, m_hFont);
// measure text size
DrawTextW(m_hDC, pszText, nLen, &rc, dwCalcFmt);
SelectObject(m_hDC, hOld);
tRet.cx = rc.right;
tRet.cy = rc.bottom;
} while (0);
return tRet;
}
bool prepareBitmap(int nWidth, int nHeight)
{
// release bitmap
if (m_hBmp)
{
DeleteObject(m_hBmp);
m_hBmp = NULL;
}
if (nWidth > 0 && nHeight > 0)
{
m_hBmp = CreateBitmap(nWidth, nHeight, 1, 32, NULL);
if (! m_hBmp)
{
return false;
}
}
return true;
}
int drawText(const char * pszText, SIZE& tSize, CCImage::ETextAlign eAlign)
{
int nRet = 0;
wchar_t * pwszBuffer = 0;
do
{
CC_BREAK_IF(! pszText);
DWORD dwFmt = DT_WORDBREAK;
DWORD dwHoriFlag = eAlign & 0x0f;
DWORD dwVertFlag = (eAlign & 0xf0) >> 4;
switch (dwHoriFlag)
{
case 1: // left
dwFmt |= DT_LEFT;
break;
case 2: // right
dwFmt |= DT_RIGHT;
break;
case 3: // center
dwFmt |= DT_CENTER;
break;
}
int nLen = strlen(pszText);
// utf-8 to utf-16
int nBufLen = nLen + 1;
pwszBuffer = new wchar_t[nBufLen];
CC_BREAK_IF(! pwszBuffer);
memset(pwszBuffer, 0, sizeof(wchar_t)*nBufLen);
nLen = MultiByteToWideChar(CP_UTF8, 0, pszText, nLen, pwszBuffer, nBufLen);
SIZE newSize = sizeWithText(pwszBuffer, nLen, dwFmt, tSize.cx);
RECT rcText = {0};
// if content width is 0, use text size as content size
if (tSize.cx <= 0)
{
tSize = newSize;
rcText.right = newSize.cx;
rcText.bottom = newSize.cy;
}
else
{
LONG offsetX = 0;
LONG offsetY = 0;
rcText.right = newSize.cx; // store the text width to rectangle
// calculate text horizontal offset
if (1 != dwHoriFlag // and text isn't align to left
&& newSize.cx < tSize.cx) // and text's width less then content width,
{ // then need adjust offset of X.
offsetX = (2 == dwHoriFlag) ? tSize.cx - newSize.cx // align to right
: (tSize.cx - newSize.cx) / 2; // align to center
}
// if content height is 0, use text height as content height
// else if content height less than text height, use content height to draw text
if (tSize.cy <= 0)
{
tSize.cy = newSize.cy;
dwFmt |= DT_NOCLIP;
rcText.bottom = newSize.cy; // store the text height to rectangle
}
else if (tSize.cy < newSize.cy)
{
// content height larger than text height need, clip text to rect
rcText.bottom = tSize.cy;
}
else
{
rcText.bottom = newSize.cy; // store the text height to rectangle
// content larger than text, need adjust vertical position
dwFmt |= DT_NOCLIP;
// calculate text vertical offset
offsetY = (2 == dwVertFlag) ? tSize.cy - newSize.cy // align to bottom
: (3 == dwVertFlag) ? (tSize.cy - newSize.cy) / 2 // align to middle
: 0; // align to top
}
if (offsetX || offsetY)
{
OffsetRect(&rcText, offsetX, offsetY);
}
}
CC_BREAK_IF(! prepareBitmap(tSize.cx, tSize.cy));
// draw text
HGDIOBJ hOldFont = SelectObject(m_hDC, m_hFont);
HGDIOBJ hOldBmp = SelectObject(m_hDC, m_hBmp);
SetBkMode(m_hDC, TRANSPARENT);
SetTextColor(m_hDC, RGB(255, 255, 255)); // white color
// draw text
nRet = DrawTextW(m_hDC, pwszBuffer, nLen, &rcText, dwFmt);
//DrawTextA(m_hDC, pszText, nLen, &rcText, dwFmt);
SelectObject(m_hDC, hOldBmp);
SelectObject(m_hDC, hOldFont);
} while (0);
CC_SAFE_DELETE_ARRAY(pwszBuffer);
return nRet;
}
CC_SYNTHESIZE_READONLY(HDC, m_hDC, DC);
CC_SYNTHESIZE_READONLY(HBITMAP, m_hBmp, Bitmap);
private:
friend class CCImage;
HFONT m_hFont;
HWND m_hWnd;
std::string m_curFontPath;
};
static BitmapDC& sharedBitmapDC()
{
static BitmapDC s_BmpDC;
return s_BmpDC;
}
bool CCImage::initWithString(
const char * pText,
int nWidth/* = 0*/,
int nHeight/* = 0*/,
ETextAlign eAlignMask/* = kAlignCenter*/,
const char * pFontName/* = nil*/,
int nSize/* = 0*/)
{
bool bRet = false;
do
{
CC_BREAK_IF(! pText);
BitmapDC& dc = sharedBitmapDC();
if (! dc.setFont(pFontName, nSize))
{
CCLog("Can't found font(%s), use system default", pFontName);
}
// draw text
SIZE size = {nWidth, nHeight};
CC_BREAK_IF(! dc.drawText(pText, size, eAlignMask));
m_pData = new unsigned char[size.cx * size.cy * 4];
CC_BREAK_IF(! m_pData);
struct
{
BITMAPINFOHEADER bmiHeader;
int mask[4];
} bi = {0};
bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
CC_BREAK_IF(! GetDIBits(dc.getDC(), dc.getBitmap(), 0, 0,
NULL, (LPBITMAPINFO)&bi, DIB_RGB_COLORS));
m_nWidth = (short)size.cx;
m_nHeight = (short)size.cy;
m_bHasAlpha = true;
m_bPreMulti = false;
m_nBitsPerComponent = 8;
// copy pixed data
bi.bmiHeader.biHeight = (bi.bmiHeader.biHeight > 0)
? - bi.bmiHeader.biHeight : bi.bmiHeader.biHeight;
GetDIBits(dc.getDC(), dc.getBitmap(), 0, m_nHeight, m_pData,
(LPBITMAPINFO)&bi, DIB_RGB_COLORS);
// change pixel's alpha value to 255, when it's RGB != 0
COLORREF * pPixel = NULL;
for (int y = 0; y < m_nHeight; ++y)
{
pPixel = (COLORREF *)m_pData + y * m_nWidth;
for (int x = 0; x < m_nWidth; ++x)
{
COLORREF& clr = *pPixel;
if (GetRValue(clr) || GetGValue(clr) || GetBValue(clr))
{
clr |= 0xff000000;
}
++pPixel;
}
}
bRet = true;
} while (0);
return bRet;
}
NS_CC_END
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