/* * tkWinDraw.c -- * * This file contains the Xlib emulation functions pertaining to * actually drawing objects on a window. * * Copyright (c) 1995 Sun Microsystems, Inc. * Copyright (c) 1994 Software Research Associates, Inc. * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tkWinDraw.c,v 1.11 2001/12/07 05:20:52 chengyemao Exp $ */ #include "tkWinInt.h" /* * These macros convert between X's bizarre angle units to radians. */ #define PI 3.14159265358979 #define XAngleToRadians(a) ((double)(a) / 64 * PI / 180); /* * Translation table between X gc functions and Win32 raster op modes. */ int tkpWinRopModes[] = { R2_BLACK, /* GXclear */ R2_MASKPEN, /* GXand */ R2_MASKPENNOT, /* GXandReverse */ R2_COPYPEN, /* GXcopy */ R2_MASKNOTPEN, /* GXandInverted */ R2_NOT, /* GXnoop */ R2_XORPEN, /* GXxor */ R2_MERGEPEN, /* GXor */ R2_NOTMERGEPEN, /* GXnor */ R2_NOTXORPEN, /* GXequiv */ R2_NOT, /* GXinvert */ R2_MERGEPENNOT, /* GXorReverse */ R2_NOTCOPYPEN, /* GXcopyInverted */ R2_MERGENOTPEN, /* GXorInverted */ R2_NOTMASKPEN, /* GXnand */ R2_WHITE /* GXset */ }; /* * Translation table between X gc functions and Win32 BitBlt op modes. Some * of the operations defined in X don't have names, so we have to construct * new opcodes for those functions. This is arcane and probably not all that * useful, but at least it's accurate. */ #define NOTSRCAND (DWORD)0x00220326 /* dest = (NOT source) AND dest */ #define NOTSRCINVERT (DWORD)0x00990066 /* dest = (NOT source) XOR dest */ #define SRCORREVERSE (DWORD)0x00DD0228 /* dest = source OR (NOT dest) */ #define SRCNAND (DWORD)0x007700E6 /* dest = NOT (source AND dest) */ static int bltModes[] = { BLACKNESS, /* GXclear */ SRCAND, /* GXand */ SRCERASE, /* GXandReverse */ SRCCOPY, /* GXcopy */ NOTSRCAND, /* GXandInverted */ PATCOPY, /* GXnoop */ SRCINVERT, /* GXxor */ SRCPAINT, /* GXor */ NOTSRCERASE, /* GXnor */ NOTSRCINVERT, /* GXequiv */ DSTINVERT, /* GXinvert */ SRCORREVERSE, /* GXorReverse */ NOTSRCCOPY, /* GXcopyInverted */ MERGEPAINT, /* GXorInverted */ SRCNAND, /* GXnand */ WHITENESS /* GXset */ }; /* * The following raster op uses the source bitmap as a mask for the * pattern. This is used to draw in a foreground color but leave the * background color transparent. */ #define MASKPAT 0x00E20746 /* dest = (src & pat) | (!src & dst) */ /* * The following two raster ops are used to copy the foreground and background * bits of a source pattern as defined by a stipple used as the pattern. */ #define COPYFG 0x00CA0749 /* dest = (pat & src) | (!pat & dst) */ #define COPYBG 0x00AC0744 /* dest = (!pat & src) | (pat & dst) */ /* * Macros used later in the file. */ #define MIN(a,b) ((a>b) ? b : a) #define MAX(a,b) ((atype == TWD_WINDOW) { TkWindow *winPtr = twdPtr->window.winPtr; dc = GetDC(twdPtr->window.handle); if (winPtr == NULL) { cmap = DefaultColormap(display, DefaultScreen(display)); } else { cmap = winPtr->atts.colormap; } } else if (twdPtr->type == TWD_WINDC) { dc = twdPtr->winDC.hdc; cmap = DefaultColormap(display, DefaultScreen(display)); } else { dc = CreateCompatibleDC(NULL); SelectObject(dc, twdPtr->bitmap.handle); cmap = twdPtr->bitmap.colormap; } state->palette = TkWinSelectPalette(dc, cmap); state->bkmode = GetBkMode(dc); return dc; } /* *---------------------------------------------------------------------- * * TkWinReleaseDrawableDC -- * * Frees the resources associated with a drawable's DC. * * Results: * None. * * Side effects: * Restores the old bitmap handle to the memory DC for pixmaps. * *---------------------------------------------------------------------- */ void TkWinReleaseDrawableDC(d, dc, state) Drawable d; HDC dc; TkWinDCState *state; { TkWinDrawable *twdPtr = (TkWinDrawable *)d; SetBkMode(dc, state->bkmode); SelectPalette(dc, state->palette, TRUE); RealizePalette(dc); if (twdPtr->type == TWD_WINDOW) { ReleaseDC(TkWinGetHWND(d), dc); } else if (twdPtr->type == TWD_BITMAP) { DeleteDC(dc); } } /* *---------------------------------------------------------------------- * * ConvertPoints -- * * Convert an array of X points to an array of Win32 points. * * Results: * Returns the converted array of POINTs. * * Side effects: * Allocates a block of memory in thread local storage that * should not be freed. * *---------------------------------------------------------------------- */ static POINT * ConvertPoints(points, npoints, mode, bbox) XPoint *points; int npoints; int mode; /* CoordModeOrigin or CoordModePrevious. */ RECT *bbox; /* Bounding box of points. */ { ThreadSpecificData *tsdPtr = (ThreadSpecificData *) Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); int i; /* * To avoid paying the cost of a malloc on every drawing routine, * we reuse the last array if it is large enough. */ if (npoints > tsdPtr->nWinPoints) { if (tsdPtr->winPoints != NULL) { ckfree((char *) tsdPtr->winPoints); } tsdPtr->winPoints = (POINT *) ckalloc(sizeof(POINT) * npoints); if (tsdPtr->winPoints == NULL) { tsdPtr->nWinPoints = -1; return NULL; } tsdPtr->nWinPoints = npoints; } bbox->left = bbox->right = points[0].x; bbox->top = bbox->bottom = points[0].y; if (mode == CoordModeOrigin) { for (i = 0; i < npoints; i++) { tsdPtr->winPoints[i].x = points[i].x; tsdPtr->winPoints[i].y = points[i].y; bbox->left = MIN(bbox->left, tsdPtr->winPoints[i].x); bbox->right = MAX(bbox->right, tsdPtr->winPoints[i].x); bbox->top = MIN(bbox->top, tsdPtr->winPoints[i].y); bbox->bottom = MAX(bbox->bottom, tsdPtr->winPoints[i].y); } } else { tsdPtr->winPoints[0].x = points[0].x; tsdPtr->winPoints[0].y = points[0].y; for (i = 1; i < npoints; i++) { tsdPtr->winPoints[i].x = tsdPtr->winPoints[i-1].x + points[i].x; tsdPtr->winPoints[i].y = tsdPtr->winPoints[i-1].y + points[i].y; bbox->left = MIN(bbox->left, tsdPtr->winPoints[i].x); bbox->right = MAX(bbox->right, tsdPtr->winPoints[i].x); bbox->top = MIN(bbox->top, tsdPtr->winPoints[i].y); bbox->bottom = MAX(bbox->bottom, tsdPtr->winPoints[i].y); } } return tsdPtr->winPoints; } /* *---------------------------------------------------------------------- * * XCopyArea -- * * Copies data from one drawable to another using block transfer * routines. * * Results: * None. * * Side effects: * Data is moved from a window or bitmap to a second window or * bitmap. * *---------------------------------------------------------------------- */ void XCopyArea(display, src, dest, gc, src_x, src_y, width, height, dest_x, dest_y) Display* display; Drawable src; Drawable dest; GC gc; int src_x, src_y; unsigned int width, height; int dest_x, dest_y; { HDC srcDC, destDC; TkWinDCState srcState, destState; TkpClipMask *clipPtr = (TkpClipMask*)gc->clip_mask; srcDC = TkWinGetDrawableDC(display, src, &srcState); if (src != dest) { destDC = TkWinGetDrawableDC(display, dest, &destState); } else { destDC = srcDC; } if (clipPtr && clipPtr->type == TKP_CLIP_REGION) { SelectClipRgn(destDC, (HRGN) clipPtr->value.region); OffsetClipRgn(destDC, gc->clip_x_origin, gc->clip_y_origin); } BitBlt(destDC, dest_x, dest_y, width, height, srcDC, src_x, src_y, bltModes[gc->function]); SelectClipRgn(destDC, NULL); if (src != dest) { TkWinReleaseDrawableDC(dest, destDC, &destState); } TkWinReleaseDrawableDC(src, srcDC, &srcState); } /* *---------------------------------------------------------------------- * * XCopyPlane -- * * Copies a bitmap from a source drawable to a destination * drawable. The plane argument specifies which bit plane of * the source contains the bitmap. Note that this implementation * ignores the gc->function. * * Results: * None. * * Side effects: * Changes the destination drawable. * *---------------------------------------------------------------------- */ void XCopyPlane(display, src, dest, gc, src_x, src_y, width, height, dest_x, dest_y, plane) Display* display; Drawable src; Drawable dest; GC gc; int src_x, src_y; unsigned int width, height; int dest_x, dest_y; unsigned long plane; { HDC srcDC, destDC; TkWinDCState srcState, destState; HBRUSH bgBrush, fgBrush, oldBrush; TkpClipMask *clipPtr = (TkpClipMask*)gc->clip_mask; display->request++; if (plane != 1) { panic("Unexpected plane specified for XCopyPlane"); } srcDC = TkWinGetDrawableDC(display, src, &srcState); if (src != dest) { destDC = TkWinGetDrawableDC(display, dest, &destState); } else { destDC = srcDC; } if (clipPtr == NULL || clipPtr->type == TKP_CLIP_REGION) { /* * Case 1: opaque bitmaps. Windows handles the conversion * from one bit to multiple bits by setting 0 to the * foreground color, and 1 to the background color (seems * backwards, but there you are). */ if (clipPtr && clipPtr->type == TKP_CLIP_REGION) { SelectClipRgn(destDC, (HRGN) clipPtr->value.region); OffsetClipRgn(destDC, gc->clip_x_origin, gc->clip_y_origin); } SetBkMode(destDC, OPAQUE); SetBkColor(destDC, gc->foreground); SetTextColor(destDC, gc->background); BitBlt(destDC, dest_x, dest_y, width, height, srcDC, src_x, src_y, SRCCOPY); SelectClipRgn(destDC, NULL); } else if (clipPtr->type == TKP_CLIP_PIXMAP) { if (clipPtr->value.pixmap == src) { /* * Case 2: transparent bitmaps are handled by setting the * destination to the foreground color whenever the source * pixel is set. */ fgBrush = CreateSolidBrush(gc->foreground); oldBrush = SelectObject(destDC, fgBrush); BitBlt(destDC, dest_x, dest_y, width, height, srcDC, src_x, src_y, MASKPAT); SelectObject(destDC, oldBrush); DeleteObject(fgBrush); } else { /* * Case 3: two arbitrary bitmaps. Copy the source rectangle * into a color pixmap. Use the result as a brush when * copying the clip mask into the destination. */ 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; 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); } if(!bitmap) { panic("Fail to allocate bitmap\n"); DeleteDC(dcMem); TkWinReleaseDrawableDC(d, dc, &state); return; } 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 line width. */ 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); } DeleteObject(SelectObject(dc, oldBrush)); } /* *---------------------------------------------------------------------- * * XDrawLines -- * * Draw connected lines. * * Results: * None. * * Side effects: * Renders a series of connected lines. * *---------------------------------------------------------------------- */ void XDrawLines(display, d, gc, points, npoints, mode) Display* display; Drawable d; GC gc; XPoint* points; int npoints; int mode; { HPEN pen; TkWinDCState state; HDC dc; if (d == None) { return; } dc = TkWinGetDrawableDC(display, d, &state); pen = SetUpGraphicsPort(gc); SetBkMode(dc, TRANSPARENT); RenderObject(dc, gc, points, npoints, mode, pen, Polyline); DeleteObject(pen); TkWinReleaseDrawableDC(d, dc, &state); } /* *---------------------------------------------------------------------- * * XFillPolygon -- * * Draws a filled polygon. * * Results: * None. * * Side effects: * Draws a filled polygon on the specified drawable. * *---------------------------------------------------------------------- */ void XFillPolygon(display, d, gc, points, npoints, shape, mode) Display* display; Drawable d; GC gc; XPoint* points; int npoints; int shape; int mode; { HPEN pen; TkWinDCState state; HDC dc; if (d == None) { return; } dc = TkWinGetDrawableDC(display, d, &state); pen = GetStockObject(NULL_PEN); RenderObject(dc, gc, points, npoints, mode, pen, Polygon); TkWinReleaseDrawableDC(d, dc, &state); } /* *---------------------------------------------------------------------- * * XDrawRectangle -- * * Draws a rectangle. * * Results: * None. * * Side effects: * Draws a rectangle on the specified drawable. * *---------------------------------------------------------------------- */ void XDrawRectangle(display, d, gc, x, y, width, height) Display* display; Drawable d; GC gc; int x; int y; unsigned int width; unsigned int height; { HPEN pen, oldPen; TkWinDCState state; HBRUSH oldBrush; HDC dc; if (d == None) { return; } dc = TkWinGetDrawableDC(display, d, &state); pen = SetUpGraphicsPort(gc); SetBkMode(dc, TRANSPARENT); oldPen = SelectObject(dc, pen); oldBrush = SelectObject(dc, GetStockObject(NULL_BRUSH)); SetROP2(dc, tkpWinRopModes[gc->function]); Rectangle(dc, x, y, x+width+1, y+height+1); DeleteObject(SelectObject(dc, oldPen)); SelectObject(dc, oldBrush); TkWinReleaseDrawableDC(d, dc, &state); } /* *---------------------------------------------------------------------- * * XDrawArc -- * * Draw an arc. * * Results: * None. * * Side effects: * Draws an arc on the specified drawable. * *---------------------------------------------------------------------- */ void XDrawArc(display, d, gc, x, y, width, height, start, extent) Display* display; Drawable d; GC gc; int x; int y; unsigned int width; unsigned int height; int start; int extent; { display->request++; DrawOrFillArc(display, d, gc, x, y, width, height, start, extent, 0); } /* *---------------------------------------------------------------------- * * XFillArc -- * * Draw a filled arc. * * Results: * None. * * Side effects: * Draws a filled arc on the specified drawable. * *---------------------------------------------------------------------- */ void XFillArc(display, d, gc, x, y, width, height, start, extent) Display* display; Drawable d; GC gc; int x; int y; unsigned int width; unsigned int height; int start; int extent; { display->request++; DrawOrFillArc(display, d, gc, x, y, width, height, start, extent, 1); } /* *---------------------------------------------------------------------- * * DrawOrFillArc -- * * This procedure handles the rendering of drawn or filled * arcs and chords. * * Results: * None. * * Side effects: * Renders the requested arc. * *---------------------------------------------------------------------- */ static void DrawOrFillArc(display, d, gc, x, y, width, height, start, extent, fill) Display *display; Drawable d; GC gc; int x, y; /* left top */ unsigned int width, height; int start; /* start: three-o'clock (deg*64) */ int extent; /* extent: relative (deg*64) */ int fill; /* ==0 draw, !=0 fill */ { HDC dc; HBRUSH brush, oldBrush; HPEN pen, oldPen; TkWinDCState state; int clockwise = (extent < 0); /* non-zero if clockwise */ int xstart, ystart, xend, yend; double radian_start, radian_end, xr, yr; if (d == None) { return; } dc = TkWinGetDrawableDC(display, d, &state); SetROP2(dc, tkpWinRopModes[gc->function]); /* * Compute the absolute starting and ending angles in normalized radians. * Swap the start and end if drawing clockwise. */ start = start % (64*360); if (start < 0) { start += (64*360); } extent = (start+extent) % (64*360); if (extent < 0) { extent += (64*360); } if (clockwise) { int tmp = start; start = extent; extent = tmp; } radian_start = XAngleToRadians(start); radian_end = XAngleToRadians(extent); /* * Now compute points on the radial lines that define the starting and * ending angles. Be sure to take into account that the y-coordinate * system is inverted. */ xr = x + width / 2.0; yr = y + height / 2.0; xstart = (int)((xr + cos(radian_start)*width/2.0) + 0.5); ystart = (int)((yr + sin(-radian_start)*height/2.0) + 0.5); xend = (int)((xr + cos(radian_end)*width/2.0) + 0.5); yend = (int)((yr + sin(-radian_end)*height/2.0) + 0.5); /* * Now draw a filled or open figure. Note that we have to * increase the size of the bounding box by one to account for the * difference in pixel definitions between X and Windows. */ pen = SetUpGraphicsPort(gc); oldPen = SelectObject(dc, pen); if (!fill) { /* * Note that this call will leave a gap of one pixel at the * end of the arc for thin arcs. We can't use ArcTo because * it's only supported under Windows NT. */ SetBkMode(dc, TRANSPARENT); Arc(dc, x, y, x+width+1, y+height+1, xstart, ystart, xend, yend); } else { brush = CreateSolidBrush(gc->foreground); oldBrush = SelectObject(dc, brush); if (gc->arc_mode == ArcChord) { Chord(dc, x, y, x+width+1, y+height+1, xstart, ystart, xend, yend); } else if ( gc->arc_mode == ArcPieSlice ) { Pie(dc, x, y, x+width+1, y+height+1, xstart, ystart, xend, yend); } DeleteObject(SelectObject(dc, oldBrush)); } DeleteObject(SelectObject(dc, oldPen)); TkWinReleaseDrawableDC(d, dc, &state); } /* *---------------------------------------------------------------------- * * SetUpGraphicsPort -- * * Set up the graphics port from the given GC. * * Results: * None. * * Side effects: * The current port is adjusted. * *---------------------------------------------------------------------- */ static HPEN SetUpGraphicsPort(gc) GC gc; { DWORD style; if (gc->line_style == LineOnOffDash) { unsigned char *p = (unsigned char *) &(gc->dashes); /* pointer to the dash-list */ /* * Below is a simple translation of serveral dash patterns * to valid windows pen types. Far from complete, * but I don't know how to do it better. * Any ideas: */ if (p[1] && p[2]) { if (!p[3] || p[4]) { style = PS_DASHDOTDOT; /* -.. */ } else { style = PS_DASHDOT; /* -. */ } } else { if (p[0] > (4 * gc->line_width)) { style = PS_DASH; /* - */ } else { style = PS_DOT; /* . */ } } } else { style = PS_SOLID; } if (gc->line_width < 2) { return CreatePen(style, gc->line_width, gc->foreground); } else { LOGBRUSH lb; lb.lbStyle = BS_SOLID; lb.lbColor = gc->foreground; lb.lbHatch = 0; style |= PS_GEOMETRIC; switch (gc->cap_style) { case CapNotLast: case CapButt: style |= PS_ENDCAP_FLAT; break; case CapRound: style |= PS_ENDCAP_ROUND; break; default: style |= PS_ENDCAP_SQUARE; break; } switch (gc->join_style) { case JoinMiter: style |= PS_JOIN_MITER; break; case JoinRound: style |= PS_JOIN_ROUND; break; default: style |= PS_JOIN_BEVEL; break; } return ExtCreatePen(style, gc->line_width, &lb, 0, NULL); } } /* *---------------------------------------------------------------------- * * TkScrollWindow -- * * Scroll a rectangle of the specified window and accumulate * a damage region. * * Results: * Returns 0 if the scroll genereated no additional damage. * Otherwise, sets the region that needs to be repainted after * scrolling and returns 1. * * Side effects: * Scrolls the bits in the window. * *---------------------------------------------------------------------- */ int TkScrollWindow(tkwin, gc, x, y, width, height, dx, dy, damageRgn) Tk_Window tkwin; /* The window to be scrolled. */ GC gc; /* GC for window to be scrolled. */ int x, y, width, height; /* Position rectangle to be scrolled. */ int dx, dy; /* Distance rectangle should be moved. */ TkRegion damageRgn; /* Region to accumulate damage in. */ { HWND hwnd = TkWinGetHWND(Tk_WindowId(tkwin)); RECT scrollRect; scrollRect.left = x; scrollRect.top = y; scrollRect.right = x + width; scrollRect.bottom = y + height; return (ScrollWindowEx(hwnd, dx, dy, &scrollRect, NULL, (HRGN) damageRgn, NULL, 0) == NULLREGION) ? 0 : 1; } /* *---------------------------------------------------------------------- * * TkWinFillRect -- * * This routine fills a rectangle with the foreground color * from the specified GC ignoring all other GC values. This * is the fastest way to fill a drawable with a solid color. * * Results: * None. * * Side effects: * Modifies the contents of the DC drawing surface. * *---------------------------------------------------------------------- */ void TkWinFillRect(dc, x, y, width, height, pixel) HDC dc; int x, y, width, height; int pixel; { RECT rect; COLORREF oldColor; rect.left = x; rect.top = y; rect.right = x + width; rect.bottom = y + height; oldColor = SetBkColor(dc, (COLORREF)pixel); SetBkMode(dc, OPAQUE); ExtTextOut(dc, 0, 0, ETO_OPAQUE, &rect, NULL, 0, NULL); SetBkColor(dc, oldColor); } /* *---------------------------------------------------------------------- * * TkpDrawHighlightBorder -- * * This procedure draws a rectangular ring around the outside of * a widget to indicate that it has received the input focus. * * On Windows, we just draw the simple inset ring. On other sytems, * e.g. the Mac, the focus ring is a little more complicated, so we * need this abstraction. * * Results: * None. * * Side effects: * A rectangle "width" pixels wide is drawn in "drawable", * corresponding to the outer area of "tkwin". * *---------------------------------------------------------------------- */ void TkpDrawHighlightBorder(tkwin, fgGC, bgGC, highlightWidth, drawable) Tk_Window tkwin; GC fgGC; GC bgGC; int highlightWidth; Drawable drawable; { TkDrawInsetFocusHighlight(tkwin, fgGC, highlightWidth, drawable, 0); }