diff options
Diffstat (limited to 'win')
| -rw-r--r-- | win/tkWinImage.c | 350 |
1 files changed, 324 insertions, 26 deletions
diff --git a/win/tkWinImage.c b/win/tkWinImage.c index e4a153b..32b2ecb 100644 --- a/win/tkWinImage.c +++ b/win/tkWinImage.c @@ -8,7 +8,7 @@ * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tkWinImage.c,v 1.4 2002/03/26 20:13:39 chengyemao Exp $ + * RCS: @(#) $Id: tkWinImage.c,v 1.5 2002/10/10 07:25:24 hobbs Exp $ */ #include "tkWinInt.h" @@ -261,6 +261,242 @@ XCreateImage(display, visual, depth, format, offset, data, width, height, /* *---------------------------------------------------------------------- + * XGetImageZPixmap -- + * + * This function copies data from a pixmap or window into an + * XImage. This handles the ZPixmap case only. + * + * Results: + * Returns a newly allocated image containing the data from the + * given rectangle of the given drawable. + * + * Side effects: + * None. + * + * This procedure is adapted from the XGetImage implementation in TkNT. + * That code is Copyright (c) 1994 Software Research Associates, Inc. + * + *---------------------------------------------------------------------- + */ + +static XImage * +XGetImageZPixmap(display, d, x, y, width, height, plane_mask, format) + Display* display; + Drawable d; + int x; + int y; + unsigned int width; + unsigned int height; + unsigned long plane_mask; + int format; +{ + TkWinDrawable *twdPtr = (TkWinDrawable *)d; + XImage *ret_image; + unsigned char *smallBitData, *smallBitBase, *bigBitData; + HDC hdc, hdcMem; + HBITMAP hbmp, hbmpPrev; + BITMAPINFO *bmInfo = NULL; + HPALETTE hPal, hPalPrev1, hPalPrev2; + unsigned int byte_width; + unsigned int h, w, n; + unsigned char plmr, plmg, plmb; + unsigned char *data; + int size; + unsigned int depth; + TkWinDCState state; + BOOL ret; + + if (format != ZPixmap) { + TkpDisplayWarning( + "XGetImageZPixmap: only ZPixmap types are implemented", + "XGetImageZPixmap Failure"); + return NULL; + } + + hdc = TkWinGetDrawableDC(display, d, &state); + + /* Need to do a Blt operation to copy into a new bitmap */ + hbmp = CreateCompatibleBitmap(hdc, width, height); + hdcMem = CreateCompatibleDC(hdc); + hbmpPrev = SelectObject(hdcMem, hbmp); + hPal = state.palette; + if (hPal) { + hPalPrev1 = SelectPalette(hdcMem, hPal, FALSE); + n = RealizePalette(hdcMem); + if (n > 0) { + UpdateColors (hdcMem); + } + hPalPrev2 = SelectPalette(hdc, hPal, FALSE); + n = RealizePalette(hdc); + if (n > 0) { + UpdateColors (hdc); + } + } + + ret = BitBlt(hdcMem, 0, 0, width, height, hdc, x, y, SRCCOPY); + if (hPal) { + SelectPalette(hdc, hPalPrev2, FALSE); + } + SelectObject(hdcMem, hbmpPrev); + TkWinReleaseDrawableDC(d, hdc, &state); + if (ret == FALSE) { + goto cleanup; + } + if (twdPtr->type == TWD_WINDOW) { + depth = Tk_Depth((Tk_Window) twdPtr->window.winPtr); + } else { + depth = twdPtr->bitmap.depth; + } + + size = sizeof(BITMAPINFO); + if (depth <= 8) { + size += sizeof(unsigned short) * (1 << depth); + } + bmInfo = (BITMAPINFO *) ckalloc(size); + + bmInfo->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); + bmInfo->bmiHeader.biWidth = width; + bmInfo->bmiHeader.biHeight = -(int) height; + bmInfo->bmiHeader.biPlanes = 1; + bmInfo->bmiHeader.biBitCount = depth; + bmInfo->bmiHeader.biCompression = BI_RGB; + bmInfo->bmiHeader.biSizeImage = 0; + bmInfo->bmiHeader.biXPelsPerMeter = 0; + bmInfo->bmiHeader.biYPelsPerMeter = 0; + bmInfo->bmiHeader.biClrUsed = 0; + bmInfo->bmiHeader.biClrImportant = 0; + + if (depth == 1) { + unsigned char *p, *pend; + GetDIBits(hdcMem, hbmp, 0, height, NULL, bmInfo, DIB_PAL_COLORS); + data = ckalloc(bmInfo->bmiHeader.biSizeImage); + if (!data) { + /* printf("Failed to allocate data area for XImage.\n"); */ + ret_image = NULL; + goto cleanup; + } + ret_image = XCreateImage(display, NULL, depth, ZPixmap, 0, data, + width, height, 32, ((width + 31) >> 3) & ~1); + if (ret_image == NULL) { + ckfree(data); + goto cleanup; + } + + /* Get the BITMAP info into the Image. */ + if (GetDIBits(hdcMem, hbmp, 0, height, data, bmInfo, + DIB_PAL_COLORS) == 0) { + ckfree((char *) ret_image->data); + ckfree((char *) ret_image); + ret_image = NULL; + goto cleanup; + } + p = data; + pend = data + bmInfo->bmiHeader.biSizeImage; + while (p < pend) { + *p = ~*p; + p++; + } + } else if (depth == 8) { + unsigned short *palette; + unsigned int i; + unsigned char *p; + + GetDIBits(hdcMem, hbmp, 0, height, NULL, bmInfo, DIB_PAL_COLORS); + data = ckalloc(bmInfo->bmiHeader.biSizeImage); + if (!data) { + /* printf("Failed to allocate data area for XImage.\n"); */ + ret_image = NULL; + goto cleanup; + } + ret_image = XCreateImage(display, NULL, 8, ZPixmap, 0, data, + width, height, 8, width); + if (ret_image == NULL) { + ckfree((char *) data); + goto cleanup; + } + + /* Get the BITMAP info into the Image. */ + if (GetDIBits(hdcMem, hbmp, 0, height, data, bmInfo, + DIB_PAL_COLORS) == 0) { + ckfree((char *) ret_image->data); + ckfree((char *) ret_image); + ret_image = NULL; + goto cleanup; + } + p = data; + palette = (unsigned short *) bmInfo->bmiColors; + for (i = 0; i < bmInfo->bmiHeader.biSizeImage; i++, p++) { + *p = (unsigned char) palette[*p]; + } + } else { + GetDIBits(hdcMem, hbmp, 0, height, NULL, bmInfo, DIB_RGB_COLORS); + data = ckalloc(width * height * 4); + if (!data) { + /* printf("Failed to allocate data area for XImage.\n"); */ + ret_image = NULL; + goto cleanup; + } + ret_image = XCreateImage(display, NULL, 32, ZPixmap, 0, data, + width, height, 0, width * 4); + if (ret_image == NULL) { + ckfree((char *) data); + goto cleanup; + } + + byte_width = ((width * 3 + 3) & ~3); + smallBitBase = ckalloc(byte_width * height); + if (!smallBitBase) { + ckfree((char *) ret_image->data); + ckfree((char *) ret_image); + ret_image = NULL; + goto cleanup; + } + smallBitData = smallBitBase; + + /* Get the BITMAP info into the Image. */ + if (GetDIBits(hdcMem, hbmp, 0, height, smallBitData, bmInfo, + DIB_RGB_COLORS) == 0) { + ckfree((char *) ret_image->data); + ckfree((char *) ret_image); + ret_image = NULL; + goto cleanup; + } + + plmr = (unsigned char) (plane_mask & 0xff0000) >> 16; + plmg = (unsigned char) (plane_mask & 0x00ff00) >> 8; + plmb = (unsigned char) (plane_mask & 0x0000ff); + + /* Copy the 24 Bit Pixmap to a 32-Bit one. */ + for (h = 0; h < height; h++) { + bigBitData = ret_image->data + h * ret_image->bytes_per_line; + smallBitData = smallBitBase + h * byte_width; + + for (w = 0; w < width; w++) { + *bigBitData++ = ((*smallBitData++)) /* & plmr */; + *bigBitData++ = ((*smallBitData++)) /* & plmg */; + *bigBitData++ = ((*smallBitData++)) /* & plmb */; + *bigBitData++ = 0; + } + } + /* Free the Device contexts, and the Bitmap */ + ckfree((char *) smallBitBase); + } + + cleanup: + if (bmInfo) { + ckfree((char *) bmInfo); + } + if (hPal) { + SelectPalette(hdcMem, hPalPrev1, FALSE); + } + DeleteDC(hdcMem); + DeleteObject(hbmp); + + return ret_image; +} + +/* + *---------------------------------------------------------------------- * * XGetImage -- * @@ -291,39 +527,101 @@ XGetImage(display, d, x, y, width, height, plane_mask, format) TkWinDrawable *twdPtr = (TkWinDrawable *)d; XImage *imagePtr; HDC dc; - char infoBuf[sizeof(BITMAPINFO) + sizeof(RGBQUAD)]; - BITMAPINFO *infoPtr = (BITMAPINFO*)infoBuf; - if ((twdPtr->type != TWD_BITMAP) || (twdPtr->bitmap.handle == NULL) - || (format != XYPixmap) || (plane_mask != 1)) { - panic("XGetImage: not implemented"); + display->request++; + + if (twdPtr == NULL) { + /* + * Avoid unmapped windows or bad drawables + */ + return NULL; } + if (format == ZPixmap) { + /* + * This actually handles most TWD_WINDOW requests, but it varies + * from the one below in that it really does a screen capture of + * an area, but that is consistent with the Unix behavior -- hobbs + */ + imagePtr = XGetImageZPixmap(display, d, x, y, + width, height, plane_mask, format); + } else if (twdPtr->type != TWD_BITMAP) { + /* + * This handles TWD_WINDOW or TWD_WINDC. + * If the window being copied isn't visible (unmapped or obscured), + * we quietly stop copying (no user error). The user will see black + * where the widget should be. + * This branch is likely not followed in favor of XGetImageZPixmap. + */ + Tk_Window tkwin = (Tk_Window) TkWinGetWinPtr(d); + TkWinDCState state; + unsigned int xx, yy, size; + COLORREF pixel; - imagePtr = XCreateImage(display, NULL, 1, XYBitmap, 0, NULL, - width, height, 32, 0); - imagePtr->data = ckalloc(imagePtr->bytes_per_line * imagePtr->height); + dc = TkWinGetDrawableDC(display, d, &state); - dc = GetDC(NULL); + imagePtr = XCreateImage(display, NULL, Tk_Depth(tkwin), + format, 0, NULL, width, height, 32, 0); + size = imagePtr->bytes_per_line * imagePtr->height; + imagePtr->data = ckalloc(size); + ZeroMemory(imagePtr->data, size); - GetDIBits(dc, twdPtr->bitmap.handle, 0, height, NULL, - infoPtr, DIB_RGB_COLORS); + for (yy = 0; yy < height; yy++) { + for (xx = 0; xx < width; xx++) { + pixel = GetPixel(dc, x+(int)xx, y+(int)yy); + if (pixel == CLR_INVALID) { + break; + } + PutPixel(imagePtr, xx, yy, pixel); + } + } - infoPtr->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); - infoPtr->bmiHeader.biWidth = width; - infoPtr->bmiHeader.biHeight = -(LONG)height; - infoPtr->bmiHeader.biPlanes = 1; - infoPtr->bmiHeader.biBitCount = 1; - infoPtr->bmiHeader.biCompression = BI_RGB; - infoPtr->bmiHeader.biCompression = 0; - infoPtr->bmiHeader.biXPelsPerMeter = 0; - infoPtr->bmiHeader.biYPelsPerMeter = 0; - infoPtr->bmiHeader.biClrUsed = 0; - infoPtr->bmiHeader.biClrImportant = 0; + TkWinReleaseDrawableDC(d, dc, &state); + } else { + char *errMsg = NULL; + char infoBuf[sizeof(BITMAPINFO) + sizeof(RGBQUAD)]; + BITMAPINFO *infoPtr = (BITMAPINFO*)infoBuf; - GetDIBits(dc, twdPtr->bitmap.handle, 0, height, imagePtr->data, - infoPtr, DIB_RGB_COLORS); - ReleaseDC(NULL, dc); + if (twdPtr->bitmap.handle == NULL) { + errMsg = "XGetImage: not implemented for empty bitmap handles"; + } else if (format != XYPixmap) { + errMsg = "XGetImage: not implemented for format != XYPixmap"; + } else if (plane_mask != 1) { + errMsg = "XGetImage: not implemented for plane_mask != 1"; + } + if (errMsg != NULL) { + /* + * Do a soft warning for the unsupported XGetImage types. + */ + TkpDisplayWarning(errMsg, "XGetImage Failure"); + return NULL; + } + + imagePtr = XCreateImage(display, NULL, 1, XYBitmap, 0, NULL, + width, height, 32, 0); + imagePtr->data = ckalloc(imagePtr->bytes_per_line * imagePtr->height); + + dc = GetDC(NULL); + + GetDIBits(dc, twdPtr->bitmap.handle, 0, height, NULL, + infoPtr, DIB_RGB_COLORS); + + infoPtr->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); + infoPtr->bmiHeader.biWidth = width; + infoPtr->bmiHeader.biHeight = -(LONG)height; + infoPtr->bmiHeader.biPlanes = 1; + infoPtr->bmiHeader.biBitCount = 1; + infoPtr->bmiHeader.biCompression = BI_RGB; + infoPtr->bmiHeader.biCompression = 0; + infoPtr->bmiHeader.biXPelsPerMeter = 0; + infoPtr->bmiHeader.biYPelsPerMeter = 0; + infoPtr->bmiHeader.biClrUsed = 0; + infoPtr->bmiHeader.biClrImportant = 0; + + GetDIBits(dc, twdPtr->bitmap.handle, 0, height, imagePtr->data, + infoPtr, DIB_RGB_COLORS); + ReleaseDC(NULL, dc); + } return imagePtr; } |