mirror of
https://github.com/reactos/reactos.git
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[COMCTL32]
- Add DrawShadowText implementation svn path=/trunk/; revision=55578
This commit is contained in:
Rafal Harabien
parent
b226050aa4
commit
4cf1b4adda
2 changed files with 229 additions and 4 deletions
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@ -1,3 +1,126 @@
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Index: commctrl.c
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===================================================================
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--- commctrl.c (revision 55577)
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+++ commctrl.c (working copy)
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@@ -1593,12 +1593,114 @@
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*
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* Draw text with shadow.
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*/
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-int WINAPI DrawShadowText(HDC hdc, LPCWSTR pszText, UINT cch, RECT *rect, DWORD dwFlags,
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+int WINAPI DrawShadowText(HDC hdc, LPCWSTR pszText, UINT cch, RECT *prc, DWORD dwFlags,
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COLORREF crText, COLORREF crShadow, int ixOffset, int iyOffset)
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{
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- FIXME("(%p, %s, %d, %p, %d, 0x%08x, 0x%08x, %d, %d): stub\n", hdc, debugstr_w(pszText), cch, rect, dwFlags,
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- crText, crShadow, ixOffset, iyOffset);
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- return DrawTextW(hdc, pszText, cch, rect, DT_LEFT);
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+ COLORREF crOldText;
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+ RECT rcText;
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+ INT iRet, x, y, x2, y2;
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+ BYTE *pBits;
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+ HBITMAP hbm, hbmOld;
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+ BITMAPINFO bi;
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+ HDC hdcMem;
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+ HFONT hOldFont;
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+ BLENDFUNCTION bf;
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+
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+ /* Create 32 bit DIB section for the shadow */
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+ ZeroMemory(&bi, sizeof(bi));
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+ bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
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+ bi.bmiHeader.biWidth = prc->right - prc->left + 4;
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+ bi.bmiHeader.biHeight = prc->bottom - prc->top + 5; // bottom-up DIB
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+ bi.bmiHeader.biPlanes = 1;
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+ bi.bmiHeader.biBitCount = 32;
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+ bi.bmiHeader.biCompression = BI_RGB;
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+ hbm = CreateDIBSection(hdc, &bi, DIB_RGB_COLORS, (PVOID*)&pBits, NULL, 0);
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+ if(!hbm)
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+ {
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+ ERR("CreateDIBSection failed\n");
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+ return 0;
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+ }
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+
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+ /* Create memory device context for new DIB section and select it */
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+ hdcMem = CreateCompatibleDC(hdc);
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+ if(!hdcMem)
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+ {
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+ ERR("CreateCompatibleDC failed\n");
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+ DeleteObject(hbm);
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+ return 0;
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+ }
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+
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+ hbmOld = (HBITMAP)SelectObject(hdcMem, hbm);
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+
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+ /* Draw text on our helper bitmap */
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+ hOldFont = (HFONT)SelectObject(hdcMem, GetCurrentObject(hdc, OBJ_FONT));
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+ SetTextColor(hdcMem, RGB(16, 16, 16));
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+ SetBkColor(hdcMem, RGB(0, 0, 0));
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+ SetBkMode(hdcMem, TRANSPARENT);
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+ SetRect(&rcText, 0, 0, prc->right - prc->left, prc->bottom - prc->top);
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+ DrawTextW(hdcMem, pszText, cch, &rcText, dwFlags);
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+ SelectObject(hdcMem, hOldFont);
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+
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+ /* Flush GDI so data pointed by pBits is valid */
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+ GdiFlush();
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+
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+ /* Set alpha of pixels (forget about colors for now. They will be changed in next loop).
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+ We copy text image 4*5 times and each time alpha is added */
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+ for (x = 0; x < bi.bmiHeader.biWidth; ++x)
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+ for (y = 0; y < bi.bmiHeader.biHeight; ++y)
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+ {
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+ BYTE *pDest = &pBits[(y * bi.bmiHeader.biWidth + x) * 4];
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+ UINT Alpha = 0;
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+
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+ for (x2 = x - 4 + 1; x2 <= x; ++x2)
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+ for (y2 = y; y2 < y + 5; ++y2)
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+ {
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+ if (x2 >= 0 && x2 < bi.bmiHeader.biWidth && y2 >= 0 && y2 < bi.bmiHeader.biHeight)
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+ {
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+ BYTE *pSrc = &pBits[(y2 * bi.bmiHeader.biWidth + x2) * 4];
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+ Alpha += pSrc[0];
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+ }
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+ }
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+
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+ if (Alpha > 255)
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+ Alpha = 255;
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+ pDest[3] = Alpha;
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+ }
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+
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+ /* Now set the color of each pixel to shadow color * alpha (see GdiAlphaBlend) */
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+ for (x = 0; x < bi.bmiHeader.biWidth; ++x)
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+ for (y = 0; y < bi.bmiHeader.biHeight; ++y)
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+ {
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+ BYTE *pDest = &pBits[(y * bi.bmiHeader.biWidth + x) * 4];
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+ pDest[0] = GetBValue(crShadow) * pDest[3] / 255;
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+ pDest[1] = GetGValue(crShadow) * pDest[3] / 255;
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+ pDest[2] = GetRValue(crShadow) * pDest[3] / 255;
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+ }
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+
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+ /* Fix ixOffset of the shadow (tested on Win) */
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+ ixOffset -= 3;
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+ iyOffset -= 3;
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+
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+ /* Alpha blend helper image to destination DC */
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+ bf.BlendOp = AC_SRC_OVER;
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+ bf.BlendFlags = 0;
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+ bf.SourceConstantAlpha = 255;
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+ bf.AlphaFormat = AC_SRC_ALPHA;
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+ if (!GdiAlphaBlend(hdc, prc->left + ixOffset, prc->top + iyOffset, bi.bmiHeader.biWidth, bi.bmiHeader.biHeight, hdcMem, 0, 0, bi.bmiHeader.biWidth, bi.bmiHeader.biHeight, bf))
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+ ERR("GdiAlphaBlend failed: %lu\n", GetLastError());
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+
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+ /* Delete the helper bitmap */
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+ SelectObject(hdcMem, hbmOld);
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+ DeleteObject(hbm);
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+ DeleteDC(hdcMem);
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+
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+ /* Finally draw the text over shadow */
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+ crOldText = SetTextColor(hdc, crText);
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+ SetBkMode(hdc, TRANSPARENT);
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+ iRet = DrawTextW(hdc, pszText, cch, prc, dwFlags);
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+ SetTextColor(hdc, crOldText);
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+
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+ return iRet;
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}
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/***********************************************************************
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Index: propsheet.c
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Index: propsheet.c
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===================================================================
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===================================================================
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--- propsheet.c (revision 38890)
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--- propsheet.c (revision 38890)
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@ -1593,12 +1593,114 @@ LRESULT WINAPI SetPathWordBreakProc(HWND hwnd, BOOL bSet)
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*
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*
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* Draw text with shadow.
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* Draw text with shadow.
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*/
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*/
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int WINAPI DrawShadowText(HDC hdc, LPCWSTR pszText, UINT cch, RECT *rect, DWORD dwFlags,
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int WINAPI DrawShadowText(HDC hdc, LPCWSTR pszText, UINT cch, RECT *prc, DWORD dwFlags,
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COLORREF crText, COLORREF crShadow, int ixOffset, int iyOffset)
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COLORREF crText, COLORREF crShadow, int ixOffset, int iyOffset)
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{
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{
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FIXME("(%p, %s, %d, %p, %d, 0x%08x, 0x%08x, %d, %d): stub\n", hdc, debugstr_w(pszText), cch, rect, dwFlags,
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COLORREF crOldText;
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crText, crShadow, ixOffset, iyOffset);
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RECT rcText;
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return DrawTextW(hdc, pszText, cch, rect, DT_LEFT);
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INT iRet, x, y, x2, y2;
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BYTE *pBits;
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HBITMAP hbm, hbmOld;
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BITMAPINFO bi;
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HDC hdcMem;
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HFONT hOldFont;
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BLENDFUNCTION bf;
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/* Create 32 bit DIB section for the shadow */
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ZeroMemory(&bi, sizeof(bi));
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bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
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bi.bmiHeader.biWidth = prc->right - prc->left + 4;
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bi.bmiHeader.biHeight = prc->bottom - prc->top + 5; // bottom-up DIB
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bi.bmiHeader.biPlanes = 1;
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bi.bmiHeader.biBitCount = 32;
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bi.bmiHeader.biCompression = BI_RGB;
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hbm = CreateDIBSection(hdc, &bi, DIB_RGB_COLORS, (PVOID*)&pBits, NULL, 0);
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if(!hbm)
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{
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ERR("CreateDIBSection failed\n");
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return 0;
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}
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/* Create memory device context for new DIB section and select it */
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hdcMem = CreateCompatibleDC(hdc);
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if(!hdcMem)
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{
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ERR("CreateCompatibleDC failed\n");
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DeleteObject(hbm);
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return 0;
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}
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hbmOld = (HBITMAP)SelectObject(hdcMem, hbm);
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/* Draw text on our helper bitmap */
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hOldFont = (HFONT)SelectObject(hdcMem, GetCurrentObject(hdc, OBJ_FONT));
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SetTextColor(hdcMem, RGB(16, 16, 16));
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SetBkColor(hdcMem, RGB(0, 0, 0));
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SetBkMode(hdcMem, TRANSPARENT);
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SetRect(&rcText, 0, 0, prc->right - prc->left, prc->bottom - prc->top);
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DrawTextW(hdcMem, pszText, cch, &rcText, dwFlags);
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SelectObject(hdcMem, hOldFont);
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/* Flush GDI so data pointed by pBits is valid */
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GdiFlush();
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/* Set alpha of pixels (forget about colors for now. They will be changed in next loop).
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We copy text image 4*5 times and each time alpha is added */
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for (x = 0; x < bi.bmiHeader.biWidth; ++x)
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for (y = 0; y < bi.bmiHeader.biHeight; ++y)
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{
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BYTE *pDest = &pBits[(y * bi.bmiHeader.biWidth + x) * 4];
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UINT Alpha = 0;
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for (x2 = x - 4 + 1; x2 <= x; ++x2)
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for (y2 = y; y2 < y + 5; ++y2)
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{
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if (x2 >= 0 && x2 < bi.bmiHeader.biWidth && y2 >= 0 && y2 < bi.bmiHeader.biHeight)
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{
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BYTE *pSrc = &pBits[(y2 * bi.bmiHeader.biWidth + x2) * 4];
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Alpha += pSrc[0];
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}
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}
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if (Alpha > 255)
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Alpha = 255;
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pDest[3] = Alpha;
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}
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/* Now set the color of each pixel to shadow color * alpha (see GdiAlphaBlend) */
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for (x = 0; x < bi.bmiHeader.biWidth; ++x)
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for (y = 0; y < bi.bmiHeader.biHeight; ++y)
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{
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BYTE *pDest = &pBits[(y * bi.bmiHeader.biWidth + x) * 4];
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pDest[0] = GetBValue(crShadow) * pDest[3] / 255;
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pDest[1] = GetGValue(crShadow) * pDest[3] / 255;
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pDest[2] = GetRValue(crShadow) * pDest[3] / 255;
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}
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/* Fix ixOffset of the shadow (tested on Win) */
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ixOffset -= 3;
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iyOffset -= 3;
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/* Alpha blend helper image to destination DC */
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bf.BlendOp = AC_SRC_OVER;
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bf.BlendFlags = 0;
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bf.SourceConstantAlpha = 255;
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bf.AlphaFormat = AC_SRC_ALPHA;
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if (!GdiAlphaBlend(hdc, prc->left + ixOffset, prc->top + iyOffset, bi.bmiHeader.biWidth, bi.bmiHeader.biHeight, hdcMem, 0, 0, bi.bmiHeader.biWidth, bi.bmiHeader.biHeight, bf))
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ERR("GdiAlphaBlend failed: %lu\n", GetLastError());
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/* Delete the helper bitmap */
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SelectObject(hdcMem, hbmOld);
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DeleteObject(hbm);
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DeleteDC(hdcMem);
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/* Finally draw the text over shadow */
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crOldText = SetTextColor(hdc, crText);
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SetBkMode(hdc, TRANSPARENT);
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iRet = DrawTextW(hdc, pszText, cch, prc, dwFlags);
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SetTextColor(hdc, crOldText);
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return iRet;
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}
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}
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/***********************************************************************
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/***********************************************************************
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