/* * tkWinImage.c -- * * This file contains routines for manipulation full-color images. * * Copyright (c) 1995 Sun Microsystems, Inc. * * 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 1.6.2.1 2003/07/17 01:02:47 hobbs Exp $ */ #include "tkWinInt.h" static int DestroyImage _ANSI_ARGS_((XImage* data)); static unsigned long ImageGetPixel _ANSI_ARGS_((XImage *image, int x, int y)); static int PutPixel _ANSI_ARGS_((XImage *image, int x, int y, unsigned long pixel)); /* *---------------------------------------------------------------------- * * DestroyImage -- * * This is a trivial wrapper around ckfree to make it possible to * pass ckfree as a pointer. * * Results: * None. * * Side effects: * Deallocates the image. * *---------------------------------------------------------------------- */ static int DestroyImage(imagePtr) XImage *imagePtr; /* image to free */ { if (imagePtr) { if (imagePtr->data) { ckfree((char*)imagePtr->data); } ckfree((char*)imagePtr); } return 0; } /* *---------------------------------------------------------------------- * * ImageGetPixel -- * * Get a single pixel from an image. * * Results: * Returns the 32 bit pixel value. * * Side effects: * None. * *---------------------------------------------------------------------- */ static unsigned long ImageGetPixel(image, x, y) XImage *image; int x, y; { unsigned long pixel = 0; unsigned char *srcPtr = &(image->data[(y * image->bytes_per_line) + ((x * image->bits_per_pixel) / NBBY)]); switch (image->bits_per_pixel) { case 32: case 24: pixel = RGB(srcPtr[2], srcPtr[1], srcPtr[0]); break; case 16: pixel = RGB(((((WORD*)srcPtr)[0]) >> 7) & 0xf8, ((((WORD*)srcPtr)[0]) >> 2) & 0xf8, ((((WORD*)srcPtr)[0]) << 3) & 0xf8); break; case 8: pixel = srcPtr[0]; break; case 4: pixel = ((x%2) ? (*srcPtr) : ((*srcPtr) >> 4)) & 0x0f; break; case 1: pixel = ((*srcPtr) & (0x80 >> (x%8))) ? 1 : 0; break; } return pixel; } /* *---------------------------------------------------------------------- * * PutPixel -- * * Set a single pixel in an image. * * Results: * None. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int PutPixel(image, x, y, pixel) XImage *image; int x, y; unsigned long pixel; { unsigned char *destPtr = &(image->data[(y * image->bytes_per_line) + ((x * image->bits_per_pixel) / NBBY)]); switch (image->bits_per_pixel) { case 32: /* * Pixel is DWORD: 0x00BBGGRR */ destPtr[3] = 0; case 24: /* * Pixel is triplet: 0xBBGGRR. */ destPtr[0] = (unsigned char) GetBValue(pixel); destPtr[1] = (unsigned char) GetGValue(pixel); destPtr[2] = (unsigned char) GetRValue(pixel); break; case 16: /* * Pixel is WORD: 5-5-5 (R-G-B) */ (*(WORD*)destPtr) = ((GetRValue(pixel) & 0xf8) << 7) | ((GetGValue(pixel) & 0xf8) <<2) | ((GetBValue(pixel) & 0xf8) >> 3); break; case 8: /* * Pixel is 8-bit index into color table. */ (*destPtr) = (unsigned char) pixel; break; case 4: /* * Pixel is 4-bit index in MSBFirst order. */ if (x%2) { (*destPtr) = (unsigned char) (((*destPtr) & 0xf0) | (pixel & 0x0f)); } else { (*destPtr) = (unsigned char) (((*destPtr) & 0x0f) | ((pixel << 4) & 0xf0)); } break; case 1: { /* * Pixel is bit in MSBFirst order. */ int mask = (0x80 >> (x%8)); if (pixel) { (*destPtr) |= mask; } else { (*destPtr) &= ~mask; } } break; } return 0; } /* *---------------------------------------------------------------------- * * XCreateImage -- * * Allocates storage for a new XImage. * * Results: * Returns a newly allocated XImage. * * Side effects: * None. * *---------------------------------------------------------------------- */ XImage * XCreateImage(display, visual, depth, format, offset, data, width, height, bitmap_pad, bytes_per_line) Display* display; Visual* visual; unsigned int depth; int format; int offset; char* data; unsigned int width; unsigned int height; int bitmap_pad; int bytes_per_line; { XImage* imagePtr = (XImage *) ckalloc(sizeof(XImage)); imagePtr->width = width; imagePtr->height = height; imagePtr->xoffset = offset; imagePtr->format = format; imagePtr->data = data; imagePtr->byte_order = LSBFirst; imagePtr->bitmap_unit = 8; imagePtr->bitmap_bit_order = LSBFirst; imagePtr->bitmap_pad = bitmap_pad; imagePtr->bits_per_pixel = depth; imagePtr->depth = depth; /* * Under Windows, bitmap_pad must be on an LONG data-type boundary. */ #define LONGBITS (sizeof(LONG) * 8) bitmap_pad = (bitmap_pad + LONGBITS - 1) / LONGBITS * LONGBITS; /* * Round to the nearest bitmap_pad boundary. */ if (bytes_per_line) { imagePtr->bytes_per_line = bytes_per_line; } else { imagePtr->bytes_per_line = (((depth * width) + (bitmap_pad - 1)) >> 3) & ~((bitmap_pad >> 3) - 1); } imagePtr->red_mask = 0; imagePtr->green_mask = 0; imagePtr->blue_mask = 0; imagePtr->f.put_pixel = PutPixel; imagePtr->f.get_pixel = ImageGetPixel; imagePtr->f.destroy_image = DestroyImage; imagePtr->f.create_image = NULL; imagePtr->f.sub_image = NULL; imagePtr->f.add_pixel = NULL; return imagePtr; } /* *---------------------------------------------------------------------- * 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; HDC hdc, hdcMem; HBITMAP hbmp, hbmpPrev; BITMAPINFO *bmInfo = NULL; HPALETTE hPal, hPalPrev1, hPalPrev2; int size; unsigned int n; unsigned int depth; unsigned char *data; 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; } if (depth <= 24) { unsigned char *smallBitData, *smallBitBase, *bigBitData; unsigned int byte_width, h, w; 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); ckfree((char *) smallBitBase); ret_image = NULL; goto cleanup; } /* 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++)); *bigBitData++ = ((*smallBitData++)); *bigBitData++ = ((*smallBitData++)); *bigBitData++ = 0; } } /* Free the Device contexts, and the Bitmap */ ckfree((char *) smallBitBase); } else { /* Get the BITMAP info directly into the Image. */ if (GetDIBits(hdcMem, hbmp, 0, height, ret_image->data, bmInfo, DIB_RGB_COLORS) == 0) { ckfree((char *) ret_image->data); ckfree((char *) ret_image); ret_image = NULL; goto cleanup; } } } cleanup: if (bmInfo) { ckfree((char *) bmInfo); } if (hPal) { SelectPalette(hdcMem, hPalPrev1, FALSE); } DeleteDC(hdcMem); DeleteObject(hbmp); return ret_image; } /* *---------------------------------------------------------------------- * * XGetImage -- * * This function copies data from a pixmap or window into an * XImage. * * Results: * Returns a newly allocated image containing the data from the * given rectangle of the given drawable. * * Side effects: * None. * *---------------------------------------------------------------------- */ XImage * XGetImage(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 *imagePtr; HDC dc; display->request++; if (twdPtr == NULL) { /* * Avoid unmapped windows or bad drawables */ return NULL; } if (twdPtr->type != TWD_BITMAP) { /* * This handles TWD_WINDOW or TWD_WINDC, always creating a 32bit * image. 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 followed in favor of XGetImageZPixmap as * postscript printed widgets require RGB data. */ TkWinDCState state; unsigned int xx, yy, size; COLORREF pixel; dc = TkWinGetDrawableDC(display, d, &state); imagePtr = XCreateImage(display, NULL, 32, format, 0, NULL, width, height, 32, 0); size = imagePtr->bytes_per_line * imagePtr->height; imagePtr->data = ckalloc(size); ZeroMemory(imagePtr->data, size); 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); } } TkWinReleaseDrawableDC(d, dc, &state); } else if (format == ZPixmap) { /* * This actually handles most TWD_WINDOW requests, but it varies * from the above in that it really does a screen capture of * an area, which is consistent with the Unix behavior, but does * not appear to handle all bit depths correctly. -- hobbs */ imagePtr = XGetImageZPixmap(display, d, x, y, width, height, plane_mask, format); } else { char *errMsg = NULL; char infoBuf[sizeof(BITMAPINFO) + sizeof(RGBQUAD)]; BITMAPINFO *infoPtr = (BITMAPINFO*)infoBuf; 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.biSizeImage = 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; }