Fixes the scaling problem when printing. The image is scaled to fit whilst
preserving the aspect ratio. It is centered horizontally and vertically aligned at the top of the page. On Win9x/ME I'm getting a slight problem with the left and right margins when printing to our samba/cups shared printer which is making the Epson Stylus Color 860 emulate a post-script printer (I think). If I print to a file and use the HP LaserJet 6P/6MP PostScript driver it looks OK. I'm hoping it is a driver problem on my system.
This commit is contained in:
John Popplewell
parent
4a6be0d16b
commit
e94f8afb63
1 changed files with 75 additions and 106 deletions
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@ -263,7 +263,6 @@ static HDC GetDefaultPrinterDC(void)
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return NULL;
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}
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static HDC GetPrinterDC(HWND hWnd, const char *printcfg, int show)
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{
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if (printcfg)
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@ -277,24 +276,13 @@ static HDC GetPrinterDC(HWND hWnd, const char *printcfg, int show)
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}
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static int IsBandingRequired(HDC hPrinter)
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{
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OSVERSIONINFO osvi;
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int indata = NEXTBAND;
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osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
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if (GetVersionEx(&osvi) && (osvi.dwPlatformId != VER_PLATFORM_WIN32_NT))
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return Escape(hPrinter, QUERYESCSUPPORT, sizeof(int), (LPCSTR) & indata,
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NULL);
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return 0;
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}
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int IsPrinterAvailable(void)
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{
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return (GetDefaultPrinterStrings(NULL, NULL, NULL) != 0);
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}
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#define STRETCH_TO_FIT 0
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#define SCALE_TO_FIT 1
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const char *SurfacePrint(SDL_Surface * surf, const char *printcfg,
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int showdialog)
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@ -304,18 +292,16 @@ const char *SurfacePrint(SDL_Surface * surf, const char *printcfg,
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DOCINFO di;
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int nError;
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SDL_SysWMinfo wminfo;
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HDC hDCwindow;
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HDC hDCprinter;
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BITMAPINFOHEADER bmih;
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SDL_Surface *surf24 = NULL;
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RECT rc;
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float fLogPelsX1, fLogPelsY1, fLogPelsX2, fLogPelsY2;
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float fScaleX, fScaleY;
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int cWidthPels, xLeft, yTop;
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float subscaler, subscalerx, subscalery;
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RECT rcDst;
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float sX, sY;
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int pageWidth, pageHeight;
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int hDCCaps;
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HBITMAP hbm = NULL;
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HDC hdcMem = NULL;
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int scaling = SCALE_TO_FIT;
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SDL_VERSION(&wminfo.version);
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if (!SDL_GetWMInfo(&wminfo))
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@ -365,43 +351,65 @@ const char *SurfacePrint(SDL_Surface * surf, const char *printcfg,
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bmih.biWidth = surf24->w;
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bmih.biHeight = surf24->h;
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GetClientRect(hWnd, &rc);
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subscalerx = (float) rc.right / surf24->w;
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subscalery = (float) rc.bottom / surf24->h;
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subscaler = subscalery;
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if (subscalerx < subscalery)
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subscaler = subscalerx;
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pageWidth = GetDeviceCaps(hDCprinter, HORZRES);
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pageHeight = GetDeviceCaps(hDCprinter, VERTRES);
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sX = GetDeviceCaps(hDCprinter, LOGPIXELSX);
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sY = GetDeviceCaps(hDCprinter, LOGPIXELSY);
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hDCwindow = GetDC(hWnd);
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if (!hDCwindow)
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switch (scaling)
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{
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res = "win32_print: failed to get window DC.";
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goto error;
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case STRETCH_TO_FIT:
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{
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/* stretches x and y dimensions independently to fit the page */
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/* doesn't preserve image aspect-ratio */
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rcDst.top = 0; rcDst.left = 0;
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rcDst.bottom = pageHeight; rcDst.right = pageWidth;
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break;
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}
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case SCALE_TO_FIT:
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{
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/* maximises image size on the page */
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/* preserves aspect-ratio, alignment is top and center */
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int width = bmih.biWidth;
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int height = bmih.biHeight;
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if (width < pageWidth && height < pageHeight)
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{
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float dW = (float)pageWidth / width;
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float dH = (float)pageHeight / height;
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if (dW < dH)
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{
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width = pageWidth;
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height = (int)((height * dW * (sY/sX)) + 0.5f);
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}
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else
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{
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width = (int)((width * dH * (sX/sY)) + 0.5f);
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height = pageHeight;
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}
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}
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if (width > pageWidth)
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{
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height= height*width/pageWidth;
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width = pageWidth;
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}
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if (height > pageHeight)
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{
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width= width*height/pageHeight;
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height = pageHeight;
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}
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rcDst.top = 0;
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rcDst.left = (pageWidth-width)/2;
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rcDst.bottom = rcDst.top+height;
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rcDst.right = rcDst.left+width;
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break;
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}
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default:
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res = "win32_print: invalid scaling option.";
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goto error;
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}
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fLogPelsX1 = GetDeviceCaps(hDCwindow, LOGPIXELSX);
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fLogPelsY1 = GetDeviceCaps(hDCwindow, LOGPIXELSY);
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ReleaseDC(hWnd, hDCwindow);
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fLogPelsX2 = GetDeviceCaps(hDCprinter, LOGPIXELSX);
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fLogPelsY2 = GetDeviceCaps(hDCprinter, LOGPIXELSY);
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if (fLogPelsX1 > fLogPelsX2)
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fScaleX = (fLogPelsX1 / fLogPelsX2);
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else
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fScaleX = (fLogPelsX2 / fLogPelsX1);
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if (fLogPelsY1 > fLogPelsY2)
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fScaleY = (fLogPelsY1 / fLogPelsY2);
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else
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fScaleY = (fLogPelsY2 / fLogPelsY1);
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fScaleX *= subscaler;
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fScaleY *= subscaler;
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yTop = 0;
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cWidthPels = GetDeviceCaps(hDCprinter, PHYSICALWIDTH);
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xLeft = ((cWidthPels - ((int) (fScaleX * bmih.biWidth))) / 2) -
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GetDeviceCaps(hDCprinter, PHYSICALOFFSETX);
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hDCCaps = GetDeviceCaps(hDCprinter, RASTERCAPS);
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@ -411,65 +419,26 @@ const char *SurfacePrint(SDL_Surface * surf, const char *printcfg,
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goto error;
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}
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if (IsBandingRequired(hDCprinter))
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if (hDCCaps & RC_STRETCHDIB)
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{
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RECT rcBand = { 0, 0, 0, 0 };
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RECT rcPrinter;
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RECT rcImage;
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SetStretchBltMode(hDCprinter, COLORONCOLOR);
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SetRect(&rcPrinter, xLeft, yTop, (int) (fScaleX * bmih.biWidth),
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(int) (fScaleY * bmih.biHeight));
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SetRect(&rcImage, 0, 0, bmih.biWidth, bmih.biHeight);
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while (Escape(hDCprinter, NEXTBAND, 0, NULL, &rcBand))
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nError = StretchDIBits(hDCprinter, rcDst.left, rcDst.top,
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rcDst.right - rcDst.left,
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rcDst.bottom - rcDst.top,
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0, 0, bmih.biWidth, bmih.biHeight,
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surf24->pixels, (BITMAPINFO *) & bmih,
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DIB_RGB_COLORS, SRCCOPY);
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if (nError == GDI_ERROR)
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{
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if (IsRectEmpty(&rcBand))
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break;
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if (IntersectRect(&rcBand, &rcBand, &rcPrinter))
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{
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rcImage.top = (int) (0.5f + (float) rcBand.top / fScaleX);
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rcImage.bottom = (int) (0.5f + (float) rcBand.bottom / fScaleX);
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SetStretchBltMode(hDCprinter, COLORONCOLOR);
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nError = StretchDIBits(hDCprinter, rcBand.left, rcBand.top,
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rcBand.right - rcBand.left,
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rcBand.bottom - rcBand.top,
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rcImage.left, rcImage.top,
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rcImage.right - rcImage.left,
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rcImage.bottom - rcImage.top,
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surf24->pixels, (BITMAPINFO *) & bmih,
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DIB_RGB_COLORS, SRCCOPY);
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if (nError == GDI_ERROR)
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{
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res = "win32_print: StretchDIBits() failed.";
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goto error;
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}
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}
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res = "win32_print: StretchDIBits() failed.";
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goto error;
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}
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}
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else
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{
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if (hDCCaps & RC_STRETCHDIB)
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{
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SetStretchBltMode(hDCprinter, COLORONCOLOR);
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nError = StretchDIBits(hDCprinter, xLeft, yTop,
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(int) (fScaleX * bmih.biWidth),
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(int) (fScaleY * bmih.biHeight),
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0, 0, bmih.biWidth, bmih.biHeight,
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surf24->pixels, (BITMAPINFO *) & bmih,
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DIB_RGB_COLORS, SRCCOPY);
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if (nError == GDI_ERROR)
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{
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res = "win32_print: StretchDIBits() failed.";
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goto error;
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}
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}
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else
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{
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res = "win32_print: StretchDIBits() not available.";
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goto error;
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}
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res = "win32_print: StretchDIBits() not available.";
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goto error;
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}
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//////////////////////////////////////////////////////////////////////////////////////
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