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- /*
- * 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.
- *
- * SCCS: @(#) tkWinImage.c 1.13 97/07/07 11:19:45
- */
-
- #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.
- *
- *----------------------------------------------------------------------
- */
-
- 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.
- *
- *----------------------------------------------------------------------
- */
-
- 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 = MSBFirst;
- 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;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * 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;
- 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");
- }
-
-
- 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;
- }
-