Hi All! It is time to Implement Screen Shot for real hardware! Who is up to it? 8^D James
Oldies but Gold'ies
Filip Navara wrote: 03/08/04 20:44
James Tabor wrote:
Filip Navara wrote:
I cheated, because I used virtual machine with emulated S3 card, but it looks same on real HW. If you need a screenshot feature, I'll try find on of my old patches that saves screenshots to files and adapt it for the current CVS.
Regards, Filip
Ya! A good work around hack is good! If you can do so. Thank, James
Here it is. Few notes:
- Beware, it's hack!
- It's a not little hack, it's a big hack!
- Saves the screenshot to c:\reactos\screenshot.bmp.
- Press ALT-PRINTSCREEN in any usual window (not console) to take the
screenshot.
- Filip
Index: drivers/video/videoprt/videoprt.c Index: lib/user32/windows/defwnd.c =================================================================== RCS file: /CVS/ReactOS/reactos/lib/user32/windows/defwnd.c,v retrieving revision 1.124 diff -u -r1.124 defwnd.c --- lib/user32/windows/defwnd.c 22 Feb 2004 23:40:58 -0000 1.124 +++ lib/user32/windows/defwnd.c 8 Mar 2004 20:26:40 -0000 @@ -949,10 +949,205 @@ return GetSysColorBrush(COLOR_WINDOW); }
+/*
- CreateBitmapInfoStructure
- Creates a bitmap info structure for saving a bitmap into a file.
- */
+PBITMAPINFO FASTCALL +CreateBitmapInfoStructure(HDC hDC, HBITMAP hBmp) +{
- BITMAP bmp;
- PBITMAPINFO pbmi;
- WORD cClrBits;
- /* Get the width, height and the colordepth of the image. */
- if (!GetObjectW(hBmp, sizeof(BITMAP), (LPSTR)&bmp))
- {
return NULL;- }
- /* Convert the color format to a count of bits. */
- cClrBits = (WORD)(bmp.bmPlanes * bmp.bmBitsPixel);
- /*
- Allocate memory for the BITMAPINFO-structure. This structure
- contains a BITMAPINFOHEADER-structure and an array of RGBQUAD
- datastructures.
- */
- if (cClrBits <= 8)
pbmi = (PBITMAPINFO)LocalAlloc(LPTR, sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * (1 << cClrBits));- else
pbmi = (PBITMAPINFO)LocalAlloc(LPTR, sizeof(BITMAPINFOHEADER));- /* Initialize the fields in the BITMAPINFO-structure. */
- pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
- pbmi->bmiHeader.biWidth = bmp.bmWidth;
- pbmi->bmiHeader.biHeight = bmp.bmHeight;
- pbmi->bmiHeader.biPlanes = bmp.bmPlanes;
- pbmi->bmiHeader.biBitCount = bmp.bmBitsPixel;
- if (cClrBits <= 8)
pbmi->bmiHeader.biClrUsed = 1 << cClrBits;- pbmi->bmiHeader.biCompression = BI_RGB;
- /*
- Compute the number of bytes in the array of color indices
- and store the result in biSizeImage.
- */
- pbmi->bmiHeader.biSizeImage = (pbmi->bmiHeader.biWidth + 7) / 8 * pbmi->bmiHeader.biHeight * cClrBits;
- /*
- Set biClrImportant to 0 to indicate that all of the device
- colors are important.
- */
- pbmi->bmiHeader.biClrImportant = 0;
- /* And finally return the info-structure. */
- return pbmi;
+}
+/*
- SaveBitmap
- Saves a bitmap to a specified file.
- */
+HRESULT FASTCALL +SaveBitmap(PWCHAR strFileName, HDC hDC, HBITMAP hBMP) +{
- HANDLE hf;
- BITMAPFILEHEADER hdr;
- PBITMAPINFOHEADER pbih;
- LPBYTE lpBits;
- DWORD dwTotal;
- DWORD cb;
- BYTE *hp;
- DWORD dwTmp;
- PBITMAPINFO pbi;
- pbi = CreateBitmapInfoStructure(hDC, hBMP);
- if (pbi == NULL)
- {
return E_FAIL;- }
- pbih = (PBITMAPINFOHEADER)pbi;
- lpBits = (LPBYTE)GlobalAlloc(GMEM_FIXED, pbih->biSizeImage);
- if (!lpBits)
- {
return E_FAIL;- }
- /*
- Retrieve the colortable (RGBQUAD-array) and the bits
- (array of palette indices) from the DIB.
- */
- if (!GetDIBits(hDC, hBMP, 0, (WORD)pbih->biHeight, lpBits, pbi, DIB_RGB_COLORS))
- {
return E_FAIL;- }
- /* Create the .BMP file. */
- hf = CreateFileW(
strFileName,GENERIC_READ | GENERIC_WRITE,(DWORD)0,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,(HANDLE)NULL);- if (hf == INVALID_HANDLE_VALUE)
- {
return E_FAIL;- }
- hdr.bfType = 0x4D42; /* 0x42 = "B", 0x4D = "M" */
- /* Compute the size of the entire file. */
- hdr.bfSize = (DWORD)(sizeof(BITMAPFILEHEADER) + pbih->biSize + pbih->biClrUsed * sizeof(RGBQUAD) + pbih->biSizeImage);
- hdr.bfReserved1 = 0;
- hdr.bfReserved2 = 0;
- /* Compute the offset to the array of color indices. */
- hdr.bfOffBits = ( DWORD ) sizeof( BITMAPFILEHEADER ) + pbih->biSize + pbih->biClrUsed * sizeof( RGBQUAD );
- /* Copy the BITMAPFILEHEADER into the .BMP file. */
- if (!WriteFile(hf, (LPVOID)&hdr, sizeof(BITMAPFILEHEADER), (LPDWORD)&dwTmp, NULL))
- {
return E_FAIL;- }
- /* Copy the BITMAPINFOHEADER and RGBQUAD array into the file. */
- if (!WriteFile(hf,
(LPVOID)pbih,sizeof(BITMAPINFOHEADER) + pbih->biClrUsed * sizeof(RGBQUAD),(LPDWORD)&dwTmp, NULL))- {
return E_FAIL;- }
- /* Copy the array of color indices into the .BMP file. */
- dwTotal = cb = pbih->biSizeImage;
- hp = lpBits;
- if (!WriteFile(hf, (LPSTR)hp, (int)cb, (LPDWORD)&dwTmp, NULL))
- {
return E_FAIL;- }
- /* Now close the .BMP file. */
- if (!CloseHandle(hf))
- {
return E_FAIL;- }
- /* Free the memory reserved. */
- GlobalFree((HGLOBAL)lpBits);
- return S_OK;
+}
VOID FASTCALL DefWndScreenshot(HWND hWnd) {
- HDC hScreenDC = GetDC(0), hDC;
- HBITMAP hBmp, hSaveBmp;
- DbgPrint("Screenshot\n");
- hBmp = CreateCompatibleBitmap(
hScreenDC,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN));- hDC = CreateCompatibleDC(hScreenDC);
- hSaveBmp = SelectObject(hDC, hBmp);
- BitBlt(
hDC,0,0,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN),hScreenDC,0,0,SRCCOPY);- SaveBitmap(L"c:\reactos\screenshot.bmp", hDC, hBmp);
- SelectObject(hDC, hSaveBmp);
- DeleteObject(hBmp);
- DeleteDC(hDC);
}
LRESULT STDCALL Index: subsys/win32k/objects/dib.c =================================================================== RCS file: /CVS/ReactOS/reactos/subsys/win32k/objects/dib.c,v retrieving revision 1.42 diff -u -r1.42 dib.c --- subsys/win32k/objects/dib.c 19 Feb 2004 21:12:10 -0000 1.42 +++ subsys/win32k/objects/dib.c 8 Mar 2004 20:27:00 -0000 @@ -23,6 +23,7 @@ #include <windows.h> #include <stdlib.h> #include <win32k/bitmaps.h> +#include <win32k/color.h> #include <win32k/debug.h> #include "../eng/handle.h" #include <ntos/minmax.h> @@ -259,7 +260,7 @@ }
// Converts a device-dependent bitmap to a DIB -#if 0 +#if 1 INT STDCALL NtGdiGetDIBits(HDC hDC, HBITMAP hBitmap, UINT StartScan, @@ -278,7 +279,7 @@ UINT coloruse) /* [in] RGB or palette index */ #endif { -#if 0 +#if 1 BITMAPINFO Info; BITMAPCOREHEADER *Core; PBITMAPOBJ BitmapObj; @@ -377,8 +378,7 @@ Info.bmiHeader.biWidth == BitmapObj->bitmap.bmWidth && Info.bmiHeader.biHeight == BitmapObj->bitmap.bmHeight && Info.bmiHeader.biPlanes == BitmapObj->bitmap.bmPlanes &&
Info.bmiHeader.biBitCount == BitmapObj->bitmap.bmBitsPixel &&8 < Info.bmiHeader.biBitCount)
Info.bmiHeader.biBitCount == BitmapObj->bitmap.bmBitsPixel)@@ -390,7 +390,7 @@ } RtlZeroMemory(&InfoWithBitFields, sizeof(InfoWithBitFields)); RtlCopyMemory(&(InfoWithBitFields.Info), &Info, sizeof(BITMAPINFO));
if (BI_BITFIELDS == Info.bmiHeader.biCompression)
if (Info.bmiHeader.biCompression == BI_BITFIELDS)@@ -419,6 +419,22 @@ BITMAPOBJ_UnlockBitmap(hBitmap); return 0; }
if (Info.bmiHeader.biBitCount <= 8){DCObj = DC_LockDc(hDC);if (NULL == DCObj){SetLastWin32Error(ERROR_INVALID_HANDLE);BITMAPOBJ_UnlockBitmap(hBitmap);return 0;}NtGdiGetPaletteEntries(DCObj->w.hPalette,0,1 << Info.bmiHeader.biBitCount,(LPPALETTEENTRY)&UnsafeInfo->bmiColors);DC_UnlockDc(hDC);}@@ -516,7 +532,7 @@ if (bits && lines) { /* If the bitmap object already have a dib section that contains image data, get the bits from it */
if(bmp->dib && bmp->dib->dsBm.bmBitsPixel >= 15 && info->bmiHeader.biBitCount >= 15)
if(bmp->dib) { /*FIXME: Only RGB dibs supported for now */ unsigned int srcwidth = bmp->dib->dsBm.bmWidth, srcwidthb = bmp->dib->dsBm.bmWidthBytes;@@ -702,6 +718,44 @@ } break;
case 8: /* 8 bpp dstDIB */{switch(bmp->dib->dsBm.bmBitsPixel) {case 8: /* 8 bpp srcDIB -> 8 bpp dstDIB */{/* FIXME: BI_BITFIELDS not supported yet */for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)memcpy(dbits, sbits, srcwidthb);}break;default: /* ? bit bmp -> 8 bit DIB */DPRINT1("FIXME: 8 bit DIB %d bit bitmap\n",bmp->bitmap.bmBitsPixel);break;}}break;case 4: /* 4 bpp dstDIB */{switch(bmp->dib->dsBm.bmBitsPixel) {case 4: /* 4 bpp srcDIB -> 4 bpp dstDIB */{/* FIXME: BI_BITFIELDS not supported yet */for (y = 0; y < lines; y++, dbits+=dstwidthb, sbits+=srcwidthb)memcpy(dbits, sbits, srcwidthb);}break;default: /* ? bit bmp -> 4 bit DIB */DPRINT1("FIXME: 4 bit DIB %d bit bitmap\n",bmp->bitmap.bmBitsPixel);break;}}break;default: /* ? bit DIB */ DPRINT1("FIXME: Unsupported DIB depth %d\n", info->bmiHeader.biBitCount); break;
-
James Tabor