reactos/rosapps/applications/imagesoft/contrast.c

381 lines
9.7 KiB
C
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#include "precomp.h"
#define BASECOLOUR 100
VOID
AdjustContrast(HBITMAP hOrigBitmap,
HBITMAP hNewBitmap,
HWND hwnd,
HDC hdcMem,
INT RedVal,
INT GreenVal,
INT BlueVal)
{
BITMAPINFO bi;
BITMAP bitmap;
BOOL bRes;
DWORD Count = 0;
INT i, j;
PBYTE pBits;
RECT rc;
GetObject(hNewBitmap,
sizeof(BITMAP),
&bitmap);
/* Bitmap header */
bi.bmiHeader.biSize = sizeof(bi.bmiHeader);
bi.bmiHeader.biWidth = bitmap.bmWidth;
bi.bmiHeader.biHeight = bitmap.bmHeight;
bi.bmiHeader.biPlanes = 1;
bi.bmiHeader.biBitCount = 32;
bi.bmiHeader.biCompression = BI_RGB;
bi.bmiHeader.biSizeImage = bitmap.bmWidth * bitmap.bmHeight * 4;
bi.bmiHeader.biClrUsed = 0;
bi.bmiHeader.biClrImportant = 0;
/* Buffer */
pBits = (PBYTE)HeapAlloc(ProcessHeap,
0,
bitmap.bmWidth * bitmap.bmHeight * 4);
if (!pBits)
return;
/* get the bits from the original bitmap */
bRes = GetDIBits(hdcMem,
hOrigBitmap,
0,
bitmap.bmHeight,
pBits,
&bi,
DIB_RGB_COLORS);
for (i = 0; i < bitmap.bmHeight; i++)
{
for (j = 0; j < bitmap.bmWidth; j++)
{
DWORD Val = 0;
INT b, g, r;
CopyMemory(&Val,
&pBits[Count],
4);
/* Get pixels in reverse order */
b = GetRValue(Val);
g = GetGValue(Val);
r = GetBValue(Val);
r = ((r - 128) * RedVal) / 100 + 128;
g = ((g - 128) * GreenVal) / 100 + 128;
b = ((b - 128) * BlueVal) / 100 + 128;
/* Red */
if (r > 255) r = 255;
else if (r < 0) r = 0;
/* Green */
if (g > 255) g = 255;
else if (g < 0) g = 0;
/* Blue */
if (b > 255) b = 255;
else if (b < 0) b = 0;
/* Store in reverse order */
Val = RGB(b, g, r);
CopyMemory(&pBits[Count],
&Val,
4);
/* RGB color take 4 bytes.The high-order byte must be zero */
Count += 4;
}
}
/* Set the new pixel bits */
SetDIBits(hdcMem,
hNewBitmap,
0,
bRes,
pBits,
&bi,
DIB_RGB_COLORS);
HeapFree(ProcessHeap,
0,
pBits);
GetClientRect(hwnd,
&rc);
InvalidateRect(hwnd,
&rc,
FALSE);
}
static PIMAGEADJUST
Cont_OnInitDialog(PIMAGEADJUST pImgAdj,
HWND hDlg,
LPARAM lParam)
{
pImgAdj = (IMAGEADJUST*) HeapAlloc(ProcessHeap,
0,
sizeof(IMAGEADJUST));
if (!pImgAdj)
return NULL;
pImgAdj->Info = (PMAIN_WND_INFO)lParam;
if (!pImgAdj->Info->ImageEditors)
goto fail;
pImgAdj->hPicPrev = GetDlgItem(hDlg, IDC_PICPREVIEW);
GetClientRect(pImgAdj->hPicPrev,
&pImgAdj->ImageRect);
/* Make a static copy of the main image */
pImgAdj->hBitmap = (HBITMAP) CopyImage(pImgAdj->Info->ImageEditors->hBitmap,
IMAGE_BITMAP,
pImgAdj->ImageRect.right,
pImgAdj->ImageRect.bottom,
LR_CREATEDIBSECTION);
if (!pImgAdj->hBitmap)
goto fail;
/* Make a copy which will be updated */
pImgAdj->hPreviewBitmap = (HBITMAP) CopyImage(pImgAdj->Info->ImageEditors->hBitmap,
IMAGE_BITMAP,
pImgAdj->ImageRect.right,
pImgAdj->ImageRect.bottom,
LR_CREATEDIBSECTION);
if (!pImgAdj->hPreviewBitmap)
goto fail;
pImgAdj->RedVal = pImgAdj->BlueVal = pImgAdj->GreenVal = 100;
/* setup dialog */
SendDlgItemMessage(hDlg,
IDC_BRI_FULL,
BM_SETCHECK,
BST_CHECKED,
0);
SendDlgItemMessage(hDlg,
IDC_BRI_TRACKBAR,
TBM_SETRANGE,
TRUE,
(LPARAM)MAKELONG(0, 200));
SendDlgItemMessage(hDlg,
IDC_BRI_TRACKBAR,
TBM_SETPOS,
TRUE,
(LPARAM)BASECOLOUR);
SetDlgItemText(hDlg,
IDC_BRI_EDIT,
_T("100"));
return pImgAdj;
fail:
HeapFree(ProcessHeap,
0,
pImgAdj);
return NULL;
}
static VOID
Cont_OnDrawItem(PIMAGEADJUST pImgAdj,
LPARAM lParam)
{
LPDRAWITEMSTRUCT lpDrawItem;
HDC hdcMem;
lpDrawItem = (LPDRAWITEMSTRUCT)lParam;
hdcMem = CreateCompatibleDC(lpDrawItem->hDC);
if(lpDrawItem->CtlID == IDC_PICPREVIEW)
{
SelectObject(hdcMem,
pImgAdj->hPreviewBitmap);
BitBlt(lpDrawItem->hDC,
pImgAdj->ImageRect.left,
pImgAdj->ImageRect.top,
pImgAdj->ImageRect.right,
pImgAdj->ImageRect.bottom,
hdcMem,
0,
0,
SRCCOPY);
DeleteDC(hdcMem);
}
}
static VOID
Cont_OnTrackBar(PIMAGEADJUST pImgAdj,
HWND hDlg)
{
HDC hdcMem;
DWORD TrackPos;
TrackPos = (DWORD)SendDlgItemMessage(hDlg,
IDC_BRI_TRACKBAR,
TBM_GETPOS,
0,
0);
SetDlgItemInt(hDlg,
IDC_BRI_EDIT,
TrackPos,
FALSE);
if (IsDlgButtonChecked(hDlg, IDC_BRI_FULL) == BST_CHECKED)
{
pImgAdj->RedVal = pImgAdj->GreenVal = pImgAdj->BlueVal = TrackPos - BASECOLOUR + 100;
}
else if (IsDlgButtonChecked(hDlg, IDC_BRI_RED) == BST_CHECKED)
{
pImgAdj->RedVal = TrackPos - BASECOLOUR + 100;
}
else if (IsDlgButtonChecked(hDlg, IDC_BRI_GREEN) == BST_CHECKED)
{
pImgAdj->GreenVal = TrackPos - BASECOLOUR + 100;
}
else if (IsDlgButtonChecked(hDlg, IDC_BRI_BLUE) == BST_CHECKED)
{
pImgAdj->BlueVal = TrackPos - BASECOLOUR + 100;
}
hdcMem = GetDC(pImgAdj->hPicPrev);
AdjustContrast(pImgAdj->hBitmap,
pImgAdj->hPreviewBitmap,
pImgAdj->hPicPrev,
hdcMem,
pImgAdj->RedVal,
pImgAdj->GreenVal,
pImgAdj->BlueVal);
ReleaseDC(pImgAdj->hPicPrev, hdcMem);
}
static BOOL
Cont_OnCommand(PIMAGEADJUST pImgAdj,
HWND hDlg,
UINT uID)
{
switch (uID)
{
case IDOK:
{
HDC hdcMem;
hdcMem = GetDC(pImgAdj->Info->ImageEditors->hSelf);
AdjustContrast(pImgAdj->Info->ImageEditors->hBitmap,
pImgAdj->Info->ImageEditors->hBitmap,
pImgAdj->Info->ImageEditors->hSelf,
hdcMem,
pImgAdj->RedVal,
pImgAdj->GreenVal,
pImgAdj->BlueVal);
ReleaseDC(pImgAdj->Info->ImageEditors->hSelf,
hdcMem);
EndDialog(hDlg,
uID);
return TRUE;
}
case IDCANCEL:
{
EndDialog(hDlg,
uID);
return TRUE;
}
}
return FALSE;
}
INT_PTR CALLBACK
ContrastProc(HWND hDlg,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
static PIMAGEADJUST pImgAdj = NULL;
switch (message)
{
case WM_INITDIALOG:
{
pImgAdj = Cont_OnInitDialog(pImgAdj,
hDlg,
lParam);
if (!pImgAdj)
{
EndDialog(hDlg, -1);
return FALSE;
}
return TRUE;
}
case WM_DRAWITEM:
{
Cont_OnDrawItem(pImgAdj,
lParam);
return TRUE;
}
case WM_HSCROLL:
{
if (LOWORD(wParam) == TB_THUMBTRACK ||
LOWORD(wParam) == TB_ENDTRACK)
{
Cont_OnTrackBar(pImgAdj,
hDlg);
}
return TRUE;
}
case WM_COMMAND:
{
return Cont_OnCommand(pImgAdj,
hDlg,
LOWORD(wParam));
}
case WM_DESTROY:
{
if (pImgAdj)
{
if (pImgAdj->hBitmap)
DeleteObject(pImgAdj->hBitmap);
if (pImgAdj->hPreviewBitmap)
DeleteObject(pImgAdj->hPreviewBitmap);
HeapFree(ProcessHeap,
0,
pImgAdj);
}
}
}
return FALSE;
}