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[COMCTL32]

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- Add DrawShadowText implementation

svn path=/trunk/; revision=55578
This commit is contained in:
Rafal Harabien 2012-02-13 16:53:00 +00:00
parent b226050aa4
commit 4cf1b4adda
2 changed files with 229 additions and 4 deletions
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123
reactos/dll/win32/comctl32/comctl32_ros.diff
View file

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

110
reactos/dll/win32/comctl32/commctrl.c
View file

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