tkwindraw.c

linux系统下的音频通信

	     */

	    HDC memDC, maskDC;
	    HBITMAP bitmap;
	    TkWinDCState maskState;

	    fgBrush = CreateSolidBrush(gc->foreground);
	    bgBrush = CreateSolidBrush(gc->background);
	    maskDC = TkWinGetDrawableDC(display, clipPtr->value.pixmap,
		    &maskState);
	    memDC = CreateCompatibleDC(destDC);
	    bitmap = CreateBitmap(width, height, 1, 1, NULL);
	    SelectObject(memDC, bitmap);

	    /*
	     * Set foreground bits.  We create a new bitmap containing
	     * (source AND mask), then use it to set the foreground color
	     * into the destination.
	     */

	    BitBlt(memDC, 0, 0, width, height, srcDC, src_x, src_y, SRCCOPY);
	    BitBlt(memDC, 0, 0, width, height, maskDC,
		    dest_x - gc->clip_x_origin, dest_y - gc->clip_y_origin,
		    SRCAND);
	    oldBrush = SelectObject(destDC, fgBrush);
	    BitBlt(destDC, dest_x, dest_y, width, height, memDC, 0, 0,
		    MASKPAT);

	    /*
	     * Set background bits.  Same as foreground, except we use
	     * ((NOT source) AND mask) and the background brush.
	     */

	    BitBlt(memDC, 0, 0, width, height, srcDC, src_x, src_y,
		    NOTSRCCOPY);
	    BitBlt(memDC, 0, 0, width, height, maskDC,
		    dest_x - gc->clip_x_origin, dest_y - gc->clip_y_origin,
		    SRCAND);
	    SelectObject(destDC, bgBrush);
	    BitBlt(destDC, dest_x, dest_y, width, height, memDC, 0, 0,
		    MASKPAT);

	    TkWinReleaseDrawableDC(clipPtr->value.pixmap, maskDC, &maskState);
	    SelectObject(destDC, oldBrush);
	    DeleteDC(memDC);
	    DeleteObject(bitmap);
	    DeleteObject(fgBrush);
	    DeleteObject(bgBrush);
	}
    }
    if (src != dest) {
	TkWinReleaseDrawableDC(dest, destDC, &destState);
    }
    TkWinReleaseDrawableDC(src, srcDC, &srcState);
}

/*
 *----------------------------------------------------------------------
 *
 * TkPutImage --
 *
 *	Copies a subimage from an in-memory image to a rectangle of
 *	of the specified drawable.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Draws the image on the specified drawable.
 *
 *----------------------------------------------------------------------
 */

void
TkPutImage(colors, ncolors, display, d, gc, image, src_x, src_y, dest_x,
	dest_y, width, height)
    unsigned long *colors;		/* Array of pixel values used by this
					 * image.  May be NULL. */
    int ncolors;			/* Number of colors used, or 0. */
    Display* display;
    Drawable d;				/* Destination drawable. */
    GC gc;
    XImage* image;			/* Source image. */
    int src_x, src_y;			/* Offset of subimage. */      
    int dest_x, dest_y;			/* Position of subimage origin in
					 * drawable.  */
    unsigned int width, height;		/* Dimensions of subimage. */
{
    HDC dc, dcMem;
    TkWinDCState state;
    BITMAPINFO *infoPtr;
    HBITMAP bitmap;
    char *data;

    display->request++;

    dc = TkWinGetDrawableDC(display, d, &state);
    SetROP2(dc, tkpWinRopModes[gc->function]);
    dcMem = CreateCompatibleDC(dc);

    if (image->bits_per_pixel == 1) {
	/*
	 * If the image isn't in the right format, we have to copy
	 * it into a new buffer in MSBFirst and word-aligned format.
	 */

	if ((image->bitmap_bit_order != MSBFirst)
		|| (image->bitmap_pad != sizeof(WORD))) {
	    data = TkAlignImageData(image, sizeof(WORD), MSBFirst);
	    bitmap = CreateBitmap(image->width, image->height, 1, 1, data);
	    ckfree(data);
	} else {
	    bitmap = CreateBitmap(image->width, image->height, 1, 1,
		    image->data);
	}
	SetTextColor(dc, gc->foreground);
	SetBkColor(dc, gc->background);
    } else {    
	int i, usePalette;

	/*
	 * Do not use a palette for TrueColor images.
	 */
	
	usePalette = (image->bits_per_pixel < 16);
	
	if (usePalette) {
	    infoPtr = (BITMAPINFO*) ckalloc(sizeof(BITMAPINFOHEADER)
		    + sizeof(RGBQUAD)*ncolors);
	} else {
	    infoPtr = (BITMAPINFO*) ckalloc(sizeof(BITMAPINFOHEADER));
	}
	
	infoPtr->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	infoPtr->bmiHeader.biWidth = image->width;

	/*
	 * The following code works around a bug in Win32s.  CreateDIBitmap
	 * fails under Win32s for top-down images.  So we have to reverse the
	 * order of the scanlines.  If we are not running under Win32s, we can
	 * just declare the image to be top-down.
	 */

	if (tkpIsWin32s) {
	    int y;
	    char *srcPtr, *dstPtr, *temp;

	    temp = ckalloc((unsigned) image->bytes_per_line);
	    srcPtr = image->data;
	    dstPtr = image->data+(image->bytes_per_line * (image->height - 1));
	    for (y = 0; y < (image->height/2); y++) {
		memcpy(temp, srcPtr, image->bytes_per_line);
		memcpy(srcPtr, dstPtr, image->bytes_per_line);
		memcpy(dstPtr, temp, image->bytes_per_line);
		srcPtr += image->bytes_per_line;
		dstPtr -= image->bytes_per_line;
	    }
	    ckfree(temp);
	    infoPtr->bmiHeader.biHeight = image->height; /* Bottom-up order */
	} else {
	    infoPtr->bmiHeader.biHeight = -image->height; /* Top-down order */
	}
	infoPtr->bmiHeader.biPlanes = 1;
	infoPtr->bmiHeader.biBitCount = image->bits_per_pixel;
	infoPtr->bmiHeader.biCompression = BI_RGB;
	infoPtr->bmiHeader.biSizeImage = 0;
	infoPtr->bmiHeader.biXPelsPerMeter = 0;
	infoPtr->bmiHeader.biYPelsPerMeter = 0;
	infoPtr->bmiHeader.biClrImportant = 0;

	if (usePalette) {
	    infoPtr->bmiHeader.biClrUsed = ncolors;
	    for (i = 0; i < ncolors; i++) {
		infoPtr->bmiColors[i].rgbBlue = GetBValue(colors[i]);
		infoPtr->bmiColors[i].rgbGreen = GetGValue(colors[i]);
		infoPtr->bmiColors[i].rgbRed = GetRValue(colors[i]);
		infoPtr->bmiColors[i].rgbReserved = 0;
	    }
	} else {
	    infoPtr->bmiHeader.biClrUsed = 0;
	}
	bitmap = CreateDIBitmap(dc, &infoPtr->bmiHeader, CBM_INIT,
		image->data, infoPtr, DIB_RGB_COLORS);
	ckfree((char *) infoPtr);
    }
    bitmap = SelectObject(dcMem, bitmap);
    BitBlt(dc, dest_x, dest_y, width, height, dcMem, src_x, src_y, SRCCOPY);
    DeleteObject(SelectObject(dcMem, bitmap));
    DeleteDC(dcMem);
    TkWinReleaseDrawableDC(d, dc, &state);
}

/*
 *----------------------------------------------------------------------
 *
 * XFillRectangles --
 *
 *	Fill multiple rectangular areas in the given drawable.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Draws onto the specified drawable.
 *
 *----------------------------------------------------------------------
 */

void
XFillRectangles(display, d, gc, rectangles, nrectangles)
    Display* display;
    Drawable d;
    GC gc;
    XRectangle* rectangles;
    int nrectangles;
{
    HDC dc;
    int i;
    RECT rect;
    TkWinDCState state;
    HBRUSH brush;

    if (d == None) {
	return;
    }

    dc = TkWinGetDrawableDC(display, d, &state);
    SetROP2(dc, tkpWinRopModes[gc->function]);
    brush = CreateSolidBrush(gc->foreground);

    if ((gc->fill_style == FillStippled
	    || gc->fill_style == FillOpaqueStippled)
	    && gc->stipple != None) {
	TkWinDrawable *twdPtr = (TkWinDrawable *)gc->stipple;
	HBRUSH oldBrush, stipple;
	HBITMAP oldBitmap, bitmap;
	HDC dcMem;
	HBRUSH bgBrush = CreateSolidBrush(gc->background);

	if (twdPtr->type != TWD_BITMAP) {
	    panic("unexpected drawable type in stipple");
	}

	/*
	 * Select stipple pattern into destination dc.
	 */
	
	stipple = CreatePatternBrush(twdPtr->bitmap.handle);
	SetBrushOrgEx(dc, gc->ts_x_origin, gc->ts_y_origin, NULL);
	oldBrush = SelectObject(dc, stipple);
	dcMem = CreateCompatibleDC(dc);

	/*
	 * For each rectangle, create a drawing surface which is the size of
	 * the rectangle and fill it with the background color.  Then merge the
	 * result with the stipple pattern.
	 */

	for (i = 0; i < nrectangles; i++) {
	    bitmap = CreateCompatibleBitmap(dc, rectangles[i].width,
		    rectangles[i].height);
	    oldBitmap = SelectObject(dcMem, bitmap);
	    rect.left = 0;
	    rect.top = 0;
	    rect.right = rectangles[i].width;
	    rect.bottom = rectangles[i].height;
	    FillRect(dcMem, &rect, brush);
	    BitBlt(dc, rectangles[i].x, rectangles[i].y, rectangles[i].width,
		    rectangles[i].height, dcMem, 0, 0, COPYFG);
	    if (gc->fill_style == FillOpaqueStippled) {
		FillRect(dcMem, &rect, bgBrush);
		BitBlt(dc, rectangles[i].x, rectangles[i].y,
			rectangles[i].width, rectangles[i].height, dcMem,
			0, 0, COPYBG);
	    }
	    SelectObject(dcMem, oldBitmap);
	    DeleteObject(bitmap);
	}
	
	DeleteDC(dcMem);
	SelectObject(dc, oldBrush);
	DeleteObject(stipple);
	DeleteObject(bgBrush);
    } else {
	for (i = 0; i < nrectangles; i++) {
	    TkWinFillRect(dc, rectangles[i].x, rectangles[i].y,
		    rectangles[i].width, rectangles[i].height, gc->foreground);
	}
    }
    DeleteObject(brush);
    TkWinReleaseDrawableDC(d, dc, &state);
}

/*
 *----------------------------------------------------------------------
 *
 * RenderObject --
 *
 *	This function draws a shape using a list of points, a
 *	stipple pattern, and the specified drawing function.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static void
RenderObject(dc, gc, points, npoints, mode, pen, func)
    HDC dc;
    GC gc;
    XPoint* points;
    int npoints;
    int mode;
    HPEN pen;
    WinDrawFunc func;
{
    RECT rect;
    HPEN oldPen;
    HBRUSH oldBrush;
    POINT *winPoints = ConvertPoints(points, npoints, mode, &rect);
    
    if ((gc->fill_style == FillStippled
	    || gc->fill_style == FillOpaqueStippled)
	    && gc->stipple != None) {

	TkWinDrawable *twdPtr = (TkWinDrawable *)gc->stipple;
	HDC dcMem;
	LONG width, height;
	HBITMAP oldBitmap;
	int i;
	HBRUSH oldMemBrush;
	
	if (twdPtr->type != TWD_BITMAP) {
	    panic("unexpected drawable type in stipple");
	}

	/*
	 * Grow the bounding box enough to account for wide lines.
	 */

	if (gc->line_width > 1) {
	    rect.left -= gc->line_width;
	    rect.top -= gc->line_width;
	    rect.right += gc->line_width;
	    rect.bottom += gc->line_width;
	}

	width = rect.right - rect.left;
	height = rect.bottom - rect.top;

	/*
	 * Select stipple pattern into destination dc.
	 */
	
	SetBrushOrgEx(dc, gc->ts_x_origin, gc->ts_y_origin, NULL);
	oldBrush = SelectObject(dc, CreatePatternBrush(twdPtr->bitmap.handle));

	/*
	 * Create temporary drawing surface containing a copy of the
	 * destination equal in size to the bounding box of the object.
	 */
	
	dcMem = CreateCompatibleDC(dc);
	oldBitmap = SelectObject(dcMem, CreateCompatibleBitmap(dc, width,
		height));
	oldPen = SelectObject(dcMem, pen);
	BitBlt(dcMem, 0, 0, width, height, dc, rect.left, rect.top, SRCCOPY);

	/*
	 * Translate the object for rendering in the temporary drawing
	 * surface. 
	 */

	for (i = 0; i < npoints; i++) {
	    winPoints[i].x -= rect.left;
	    winPoints[i].y -= rect.top;
	}

	/*
	 * Draw the object in the foreground color and copy it to the
	 * destination wherever the pattern is set.
	 */

	SetPolyFillMode(dcMem, (gc->fill_rule == EvenOddRule) ? ALTERNATE
		: WINDING);
	oldMemBrush = SelectObject(dcMem, CreateSolidBrush(gc->foreground));
	(*func)(dcMem, winPoints, npoints);
	BitBlt(dc, rect.left, rect.top, width, height, dcMem, 0, 0, COPYFG);

	/*
	 * If we are rendering an opaque stipple, then draw the polygon in the
	 * background color and copy it to the destination wherever the pattern
	 * is clear.
	 */

	if (gc->fill_style == FillOpaqueStippled) {
	    DeleteObject(SelectObject(dcMem,
		    CreateSolidBrush(gc->background)));
	    (*func)(dcMem, winPoints, npoints);
	    BitBlt(dc, rect.left, rect.top, width, height, dcMem, 0, 0,
		    COPYBG);
	}

	SelectObject(dcMem, oldPen);
	DeleteObject(SelectObject(dcMem, oldMemBrush));
	DeleteObject(SelectObject(dcMem, oldBitmap));
	DeleteDC(dcMem);
    } else {
	oldPen = SelectObject(dc, pen);
	oldBrush = SelectObject(dc, CreateSolidBrush(gc->foreground));
	SetROP2(dc, tkpWinRopModes[gc->function]);

	SetPolyFillMode(dc, (gc->fill_rule == EvenOddRule) ? ALTERNATE
		: WINDING);

	(*func)(dc, winPoints, npoints);

	SelectObject(dc, oldPen);