diff options
| author | George Hazan <george.hazan@gmail.com> | 2014-03-04 20:41:13 +0000 |
|---|---|---|
| committer | George Hazan <george.hazan@gmail.com> | 2014-03-04 20:41:13 +0000 |
| commit | 6b3ded37e4a4825be2df3612bdcbb7dfc00a1800 (patch) | |
| tree | d6b6290439e207be3bb28718a2829e298db08342 /plugins/!NotAdopted/HistoryStats/canvas.cpp | |
| parent | d4ed74b1750b5389f22fd67246985ba782d2648b (diff) | |
HistoryStats sources
git-svn-id: http://svn.miranda-ng.org/main/trunk@8397 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
Diffstat (limited to 'plugins/!NotAdopted/HistoryStats/canvas.cpp')
| -rw-r--r-- | plugins/!NotAdopted/HistoryStats/canvas.cpp | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/plugins/!NotAdopted/HistoryStats/canvas.cpp b/plugins/!NotAdopted/HistoryStats/canvas.cpp new file mode 100644 index 0000000000..2444432ad1 --- /dev/null +++ b/plugins/!NotAdopted/HistoryStats/canvas.cpp @@ -0,0 +1,228 @@ +#include "_globals.h"
+#include "canvas.h"
+
+void Canvas::updateTrans(BYTE* pData)
+{
+ // MEMO: this follwing transparency code only makes sense for m_nChannels == 4
+ assert(m_nChannels == 4);
+
+ // apply transparency, if any
+ if (m_bTransColor)
+ {
+ for (int y = 0; y < m_nHeight; ++y)
+ {
+ COLORREF* pValue = reinterpret_cast<COLORREF*>(pData + y * m_nLineLength);
+
+ for (int x = 0; x < m_nWidth; ++x)
+ {
+ *pValue = (*pValue & 0x00FFFFFF) | ((*pValue & 0x00FFFFFF) == m_TransColor ? 0x00000000 : 0xFF000000);
+ ++pValue;
+ }
+ }
+ }
+ else
+ {
+ for (int y = 0; y < m_nHeight; ++y)
+ {
+ COLORREF* pValue = reinterpret_cast<COLORREF*>(pData + y * m_nLineLength);
+
+ for (int x = 0; x < m_nWidth; ++x)
+ {
+ *pValue |= 0xFF000000;
+ ++pValue;
+ }
+ }
+ }
+}
+
+Canvas::Canvas(int nWidth, int nHeight)
+ : m_nChannels(4)
+ , m_nWidth(nWidth)
+ , m_nHeight(nHeight)
+ , m_nLineLength((m_nChannels * m_nWidth + 3) & ~0x3)
+ , m_bTransColor(false)
+ , m_TransColor(0)
+ , m_pBMIH(NULL)
+{
+}
+
+Canvas::~Canvas()
+{
+ if (m_hOldBmp)
+ {
+ SelectObject(m_hDC, m_hOldBmp);
+ }
+
+ if (m_hBmp)
+ {
+ DeleteObject(m_hBmp);
+ }
+
+ if (m_hDC)
+ {
+ DeleteDC(m_hDC);
+ }
+
+ delete m_pBMIH;
+}
+
+void Canvas::setTrans(COLORREF transColor, bool bFill /* = false */)
+{
+ m_bTransColor = true;
+ m_TransColor = transColor;
+
+ if (bFill)
+ {
+ fillBackground(transColor);
+ }
+}
+
+void Canvas::fillBackground(COLORREF bkColor)
+{
+ HDC hDC = beginDraw();
+
+ RECT rAll = { 0, 0, m_nWidth, m_nHeight };
+
+ SetBkColor(hDC, bkColor);
+ ExtTextOut(hDC, 0, 0, ETO_OPAQUE, &rAll, NULL, 0, NULL);
+
+ endDraw();
+}
+
+HDC Canvas::beginDraw()
+{
+ if (!m_pBMIH)
+ {
+ m_pBMIH = new BITMAPINFOHEADER;
+
+ m_pBMIH->biSize = sizeof(BITMAPINFOHEADER);
+ m_pBMIH->biWidth = m_nWidth;
+ m_pBMIH->biHeight = m_nHeight;
+ m_pBMIH->biPlanes = 1;
+ m_pBMIH->biBitCount = 8 * m_nChannels;
+ m_pBMIH->biCompression = BI_RGB;
+ m_pBMIH->biSizeImage = m_nChannels * m_nWidth * m_nHeight;
+ m_pBMIH->biXPelsPerMeter = 0;
+ m_pBMIH->biYPelsPerMeter = 0;
+ m_pBMIH->biClrUsed = 0;
+ m_pBMIH->biClrImportant = 0;
+
+ BYTE* pData = 0;
+
+ m_hDC = CreateCompatibleDC(NULL);
+ m_hBmp = CreateDIBSection(m_hDC, reinterpret_cast<BITMAPINFO*>(m_pBMIH), DIB_RGB_COLORS, reinterpret_cast<void**>(&pData), NULL, 0);
+ }
+
+ m_hOldBmp = SelectObject(m_hDC, m_hBmp);
+
+ return m_hDC;
+}
+
+void Canvas::endDraw()
+{
+ SelectObject(m_hDC, m_hOldBmp);
+ m_hOldBmp = NULL;
+}
+
+bool Canvas::getDigest(Digest& digest)
+{
+ // we don't have a digest if the image is uninitialized
+ if (!m_pBMIH)
+ {
+ return false;
+ }
+
+ if (mu::sha1::_available())
+ {
+ // read data from DIB
+ int nSize = m_nLineLength * m_nHeight;
+ BYTE* pData = new BYTE[nSize];
+
+ ZeroMemory(pData, nSize);
+
+ if (GetDIBits(m_hDC, m_hBmp, 0, m_nHeight, pData, reinterpret_cast<BITMAPINFO*>(m_pBMIH), DIB_RGB_COLORS) != m_nHeight)
+ {
+ delete[] pData;
+
+ return false;
+ }
+
+ // apply transparency, if any
+ updateTrans(pData);
+
+ // calculate hash
+ SHA1_INTERFACE sha1i = mu::sha1::getInterface();
+
+ sha1i.sha1_hash(pData, nSize, digest.m_Digest);
+
+ delete[] pData;
+ }
+ else
+ {
+ // fallback digest if no SHA1 interface is available
+ static int nUniqueID = 0;
+
+ *reinterpret_cast<int*>(digest.m_Digest) = ++nUniqueID;
+ }
+
+ return true;
+}
+
+bool Canvas::writePNG(const mu_text* szFileName)
+{
+ // read data from DIB
+ BYTE* pData = new BYTE[m_nLineLength * m_nHeight];
+
+ if (GetDIBits(m_hDC, m_hBmp, 0, m_nHeight, pData, reinterpret_cast<BITMAPINFO*>(m_pBMIH), DIB_RGB_COLORS) != m_nHeight)
+ {
+ delete[] pData;
+
+ return false;
+ }
+
+ // apply transparency, if any
+ updateTrans(pData);
+
+ // calculate resulting image size
+ long png_len = 0;
+
+ if (!mu::png::dibToPng(m_pBMIH, pData, 0, &png_len) || png_len == 0)
+ {
+ delete[] pData;
+
+ return false;
+ }
+
+ // get the resulting image data
+ BYTE* pRawPNG = new BYTE[png_len];
+
+ png_len = 0;
+
+ if (!mu::png::dibToPng(m_pBMIH, pData, pRawPNG, &png_len))
+ {
+ delete[] pData;
+ delete[] pRawPNG;
+
+ return false;
+ }
+
+ // write image data to file
+ FILE* fp = _tfopen(szFileName, muT("wb"));
+
+ if (!fp)
+ {
+ delete[] pData;
+ delete[] pRawPNG;
+
+ return false;
+ }
+
+ fwrite(pRawPNG, 1, png_len, fp);
+ fclose(fp);
+
+ // free buffers
+ delete[] pRawPNG;
+ delete[] pData;
+
+ return true;
+}
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