mirror of
https://github.com/reactos/reactos.git
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371 lines
12 KiB
C++
371 lines
12 KiB
C++
/*
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* PROJECT: PAINT for ReactOS
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* LICENSE: LGPL-2.0-or-later (https://spdx.org/licenses/LGPL-2.0-or-later)
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* PURPOSE: The drawing functions used by the tools
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* COPYRIGHT: Copyright 2015 Benedikt Freisen <b.freisen@gmx.net>
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*/
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#include "precomp.h"
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/* FUNCTIONS ********************************************************/
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void
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Line(HDC hdc, LONG x1, LONG y1, LONG x2, LONG y2, COLORREF color, int thickness)
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{
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HPEN oldPen = (HPEN) SelectObject(hdc, CreatePen(PS_SOLID, thickness, color));
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MoveToEx(hdc, x1, y1, NULL);
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LineTo(hdc, x2, y2);
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SetPixelV(hdc, x2, y2, color);
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DeleteObject(SelectObject(hdc, oldPen));
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}
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void
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Rect(HDC hdc, LONG x1, LONG y1, LONG x2, LONG y2, COLORREF fg, COLORREF bg, int thickness, int style)
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{
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HBRUSH oldBrush;
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LOGBRUSH logbrush;
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HPEN oldPen = (HPEN) SelectObject(hdc, CreatePen(PS_SOLID, thickness, fg));
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logbrush.lbStyle = (style == 0) ? BS_HOLLOW : BS_SOLID;
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logbrush.lbColor = (style == 2) ? fg : bg;
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logbrush.lbHatch = 0;
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oldBrush = (HBRUSH) SelectObject(hdc, CreateBrushIndirect(&logbrush));
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Rectangle(hdc, x1, y1, x2, y2);
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DeleteObject(SelectObject(hdc, oldBrush));
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DeleteObject(SelectObject(hdc, oldPen));
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}
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void
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Ellp(HDC hdc, LONG x1, LONG y1, LONG x2, LONG y2, COLORREF fg, COLORREF bg, int thickness, int style)
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{
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HBRUSH oldBrush;
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LOGBRUSH logbrush;
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HPEN oldPen = (HPEN) SelectObject(hdc, CreatePen(PS_SOLID, thickness, fg));
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logbrush.lbStyle = (style == 0) ? BS_HOLLOW : BS_SOLID;
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logbrush.lbColor = (style == 2) ? fg : bg;
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logbrush.lbHatch = 0;
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oldBrush = (HBRUSH) SelectObject(hdc, CreateBrushIndirect(&logbrush));
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Ellipse(hdc, x1, y1, x2, y2);
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DeleteObject(SelectObject(hdc, oldBrush));
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DeleteObject(SelectObject(hdc, oldPen));
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}
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void
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RRect(HDC hdc, LONG x1, LONG y1, LONG x2, LONG y2, COLORREF fg, COLORREF bg, int thickness, int style)
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{
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LOGBRUSH logbrush;
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HBRUSH oldBrush;
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HPEN oldPen = (HPEN) SelectObject(hdc, CreatePen(PS_SOLID, thickness, fg));
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logbrush.lbStyle = (style == 0) ? BS_HOLLOW : BS_SOLID;
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logbrush.lbColor = (style == 2) ? fg : bg;
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logbrush.lbHatch = 0;
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oldBrush = (HBRUSH) SelectObject(hdc, CreateBrushIndirect(&logbrush));
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RoundRect(hdc, x1, y1, x2, y2, 16, 16);
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DeleteObject(SelectObject(hdc, oldBrush));
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DeleteObject(SelectObject(hdc, oldPen));
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}
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void
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Poly(HDC hdc, POINT * lpPoints, int nCount, COLORREF fg, COLORREF bg, int thickness, int style, BOOL closed, BOOL inverted)
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{
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LOGBRUSH logbrush;
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HBRUSH oldBrush;
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HPEN oldPen = (HPEN) SelectObject(hdc, CreatePen(PS_SOLID, thickness, fg));
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UINT oldRop = GetROP2(hdc);
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if (inverted)
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SetROP2(hdc, R2_NOTXORPEN);
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logbrush.lbStyle = (style == 0) ? BS_HOLLOW : BS_SOLID;
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logbrush.lbColor = (style == 2) ? fg : bg;
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logbrush.lbHatch = 0;
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oldBrush = (HBRUSH) SelectObject(hdc, CreateBrushIndirect(&logbrush));
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if (closed)
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Polygon(hdc, lpPoints, nCount);
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else
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Polyline(hdc, lpPoints, nCount);
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DeleteObject(SelectObject(hdc, oldBrush));
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DeleteObject(SelectObject(hdc, oldPen));
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SetROP2(hdc, oldRop);
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}
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void
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Bezier(HDC hdc, POINT p1, POINT p2, POINT p3, POINT p4, COLORREF color, int thickness)
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{
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HPEN oldPen;
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POINT fourPoints[4];
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fourPoints[0] = p1;
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fourPoints[1] = p2;
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fourPoints[2] = p3;
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fourPoints[3] = p4;
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oldPen = (HPEN) SelectObject(hdc, CreatePen(PS_SOLID, thickness, color));
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PolyBezier(hdc, fourPoints, 4);
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DeleteObject(SelectObject(hdc, oldPen));
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}
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void
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Fill(HDC hdc, LONG x, LONG y, COLORREF color)
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{
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HBRUSH oldBrush = (HBRUSH) SelectObject(hdc, CreateSolidBrush(color));
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ExtFloodFill(hdc, x, y, GetPixel(hdc, x, y), FLOODFILLSURFACE);
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DeleteObject(SelectObject(hdc, oldBrush));
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}
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void
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Erase(HDC hdc, LONG x1, LONG y1, LONG x2, LONG y2, COLORREF color, LONG radius)
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{
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LONG b = max(1, max(labs(x2 - x1), labs(y2 - y1)));
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HBRUSH hbr = ::CreateSolidBrush(color);
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for (LONG a = 0; a <= b; a++)
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{
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LONG cx = (x1 * (b - a) + x2 * a) / b;
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LONG cy = (y1 * (b - a) + y2 * a) / b;
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RECT rc = { cx - radius, cy - radius, cx + radius, cy + radius };
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::FillRect(hdc, &rc, hbr);
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}
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::DeleteObject(hbr);
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}
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void
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Replace(HDC hdc, LONG x1, LONG y1, LONG x2, LONG y2, COLORREF fg, COLORREF bg, LONG radius)
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{
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LONG b = max(1, max(labs(x2 - x1), labs(y2 - y1)));
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for (LONG a = 0; a <= b; a++)
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{
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LONG cx = (x1 * (b - a) + x2 * a) / b;
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LONG cy = (y1 * (b - a) + y2 * a) / b;
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RECT rc = { cx - radius, cy - radius, cx + radius, cy + radius };
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for (LONG y = rc.top; y < rc.bottom; ++y)
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{
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for (LONG x = rc.left; x < rc.right; ++x)
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{
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if (::GetPixel(hdc, x, y) == fg)
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::SetPixelV(hdc, x, y, bg);
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}
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}
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}
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}
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void
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Airbrush(HDC hdc, LONG x, LONG y, COLORREF color, LONG r)
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{
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for (LONG dy = -r; dy <= r; dy++)
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{
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for (LONG dx = -r; dx <= r; dx++)
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{
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if ((dx * dx + dy * dy <= r * r) && (rand() % r == 0))
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::SetPixelV(hdc, x + dx, y + dy, color);
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}
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}
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}
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void
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Brush(HDC hdc, LONG x1, LONG y1, LONG x2, LONG y2, COLORREF color, LONG style, INT thickness)
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{
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HPEN oldPen = (HPEN) SelectObject(hdc, CreatePen(PS_SOLID, 1, color));
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HBRUSH oldBrush = (HBRUSH) SelectObject(hdc, CreateSolidBrush(color));
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if (thickness <= 1)
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{
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Line(hdc, x1, y1, x2, y2, color, thickness);
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}
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else
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{
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LONG a, b = max(1, max(labs(x2 - x1), labs(y2 - y1)));
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switch ((BrushStyle)style)
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{
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case BrushStyleRound:
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for (a = 0; a <= b; a++)
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{
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Ellipse(hdc,
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(x1 * (b - a) + x2 * a) / b - (thickness / 2),
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(y1 * (b - a) + y2 * a) / b - (thickness / 2),
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(x1 * (b - a) + x2 * a) / b + (thickness / 2),
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(y1 * (b - a) + y2 * a) / b + (thickness / 2));
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}
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break;
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case BrushStyleSquare:
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for (a = 0; a <= b; a++)
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{
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Rectangle(hdc,
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(x1 * (b - a) + x2 * a) / b - (thickness / 2),
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(y1 * (b - a) + y2 * a) / b - (thickness / 2),
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(x1 * (b - a) + x2 * a) / b + (thickness / 2),
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(y1 * (b - a) + y2 * a) / b + (thickness / 2));
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}
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break;
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case BrushStyleForeSlash:
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case BrushStyleBackSlash:
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{
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POINT offsetTop, offsetBottom;
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if ((BrushStyle)style == BrushStyleForeSlash)
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{
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offsetTop = { (thickness - 1) / 2, -(thickness - 1) / 2 };
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offsetBottom = { -thickness / 2, thickness / 2 };
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}
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else
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{
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offsetTop = { -thickness / 2, -thickness / 2 };
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offsetBottom = { (thickness - 1) / 2, (thickness - 1) / 2 };
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}
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POINT points[4] =
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{
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{ x1 + offsetTop.x, y1 + offsetTop.y },
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{ x1 + offsetBottom.x, y1 + offsetBottom.y },
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{ x2 + offsetBottom.x, y2 + offsetBottom.y },
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{ x2 + offsetTop.x, y2 + offsetTop.y },
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};
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Polygon(hdc, points, _countof(points));
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break;
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}
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}
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}
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DeleteObject(SelectObject(hdc, oldBrush));
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DeleteObject(SelectObject(hdc, oldPen));
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}
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void
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RectSel(HDC hdc, LONG x1, LONG y1, LONG x2, LONG y2)
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{
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HBRUSH oldBrush;
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LOGBRUSH logbrush;
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HPEN oldPen = (HPEN) SelectObject(hdc, CreatePen(PS_DOT, 1, GetSysColor(COLOR_HIGHLIGHT)));
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UINT oldRop = GetROP2(hdc);
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SetROP2(hdc, R2_NOTXORPEN);
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logbrush.lbStyle = BS_HOLLOW;
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logbrush.lbColor = 0;
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logbrush.lbHatch = 0;
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oldBrush = (HBRUSH) SelectObject(hdc, CreateBrushIndirect(&logbrush));
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Rectangle(hdc, x1, y1, x2, y2);
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DeleteObject(SelectObject(hdc, oldBrush));
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DeleteObject(SelectObject(hdc, oldPen));
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SetROP2(hdc, oldRop);
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}
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void
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Text(HDC hdc, LONG x1, LONG y1, LONG x2, LONG y2, COLORREF fg, COLORREF bg, LPCWSTR lpchText, HFONT font, LONG style)
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{
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INT iSaveDC = ::SaveDC(hdc); // We will modify the clipping region. Save now.
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CRect rc = { x1, y1, x2, y2 };
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if (style == 0) // Transparent
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{
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::SetBkMode(hdc, TRANSPARENT);
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}
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else // Opaque
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{
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::SetBkMode(hdc, OPAQUE);
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::SetBkColor(hdc, bg);
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HBRUSH hbr = ::CreateSolidBrush(bg);
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::FillRect(hdc, &rc, hbr); // Fill the background
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::DeleteObject(hbr);
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}
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IntersectClipRect(hdc, rc.left, rc.top, rc.right, rc.bottom);
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HGDIOBJ hFontOld = ::SelectObject(hdc, font);
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::SetTextColor(hdc, fg);
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const UINT uFormat = DT_LEFT | DT_TOP | DT_EDITCONTROL | DT_NOPREFIX | DT_NOCLIP |
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DT_EXPANDTABS | DT_WORDBREAK;
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::DrawTextW(hdc, lpchText, -1, &rc, uFormat);
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::SelectObject(hdc, hFontOld);
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::RestoreDC(hdc, iSaveDC); // Restore
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}
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BOOL
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ColorKeyedMaskBlt(HDC hdcDest, int nXDest, int nYDest, int nWidth, int nHeight,
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HDC hdcSrc, int nXSrc, int nYSrc, int nSrcWidth, int nSrcHeight,
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HBITMAP hbmMask, COLORREF keyColor)
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{
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HDC hTempDC1, hTempDC2;
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HBITMAP hbmTempColor, hbmTempMask;
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HGDIOBJ hbmOld1, hbmOld2;
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if (hbmMask == NULL)
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{
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if (keyColor == CLR_INVALID)
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{
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::StretchBlt(hdcDest, nXDest, nYDest, nWidth, nHeight,
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hdcSrc, nXSrc, nYSrc, nSrcWidth, nSrcHeight, SRCCOPY);
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}
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else
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{
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::GdiTransparentBlt(hdcDest, nXDest, nYDest, nWidth, nHeight,
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hdcSrc, nXSrc, nYSrc, nSrcWidth, nSrcHeight, keyColor);
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}
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return TRUE;
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}
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else if (nWidth == nSrcWidth && nHeight == nSrcHeight && keyColor == CLR_INVALID)
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{
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::MaskBlt(hdcDest, nXDest, nYDest, nWidth, nHeight,
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hdcSrc, nXSrc, nYSrc, hbmMask, 0, 0, MAKEROP4(SRCCOPY, 0xAA0029));
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return TRUE;
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}
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hTempDC1 = ::CreateCompatibleDC(hdcDest);
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hTempDC2 = ::CreateCompatibleDC(hdcDest);
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hbmTempMask = ::CreateBitmap(nWidth, nHeight, 1, 1, NULL);
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hbmTempColor = CreateColorDIB(nWidth, nHeight, RGB(255, 255, 255));
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// hbmTempMask <-- hbmMask (stretched)
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hbmOld1 = ::SelectObject(hTempDC1, hbmMask);
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hbmOld2 = ::SelectObject(hTempDC2, hbmTempMask);
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::StretchBlt(hTempDC2, 0, 0, nWidth, nHeight, hTempDC1, 0, 0, nSrcWidth, nSrcHeight, SRCCOPY);
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::SelectObject(hTempDC2, hbmOld2);
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::SelectObject(hTempDC1, hbmOld1);
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hbmOld1 = ::SelectObject(hTempDC1, hbmTempColor);
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if (keyColor == CLR_INVALID)
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{
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// hbmTempColor <-- hdcSrc (stretched)
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::StretchBlt(hTempDC1, 0, 0, nWidth, nHeight,
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hdcSrc, nXSrc, nYSrc, nSrcWidth, nSrcHeight, SRCCOPY);
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// hdcDest <-- hbmTempColor (masked)
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::MaskBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hTempDC1, 0, 0,
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hbmTempMask, 0, 0, MAKEROP4(SRCCOPY, 0xAA0029));
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}
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else
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{
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// hbmTempColor <-- hdcDest
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::BitBlt(hTempDC1, 0, 0, nWidth, nHeight, hdcDest, nXDest, nYDest, SRCCOPY);
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// hbmTempColor <-- hdcSrc (color key)
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::GdiTransparentBlt(hTempDC1, 0, 0, nWidth, nHeight,
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hdcSrc, nXSrc, nYSrc, nSrcWidth, nSrcHeight, keyColor);
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// hdcDest <-- hbmTempColor (masked)
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::MaskBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hTempDC1, 0, 0,
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hbmTempMask, 0, 0, MAKEROP4(SRCCOPY, 0xAA0029));
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}
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::SelectObject(hTempDC1, hbmOld1);
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::DeleteObject(hbmTempColor);
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::DeleteObject(hbmTempMask);
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::DeleteDC(hTempDC2);
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::DeleteDC(hTempDC1);
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return TRUE;
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}
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void DrawXorRect(HDC hdc, const RECT *prc)
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{
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HGDIOBJ oldPen = ::SelectObject(hdc, ::CreatePen(PS_SOLID, 0, RGB(0, 0, 0)));
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HGDIOBJ oldBrush = ::SelectObject(hdc, ::GetStockObject(NULL_BRUSH));
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INT oldRop2 = SetROP2(hdc, R2_NOTXORPEN);
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::Rectangle(hdc, prc->left, prc->top, prc->right, prc->bottom);
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::SetROP2(hdc, oldRop2);
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::SelectObject(hdc, oldBrush);
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::DeleteObject(::SelectObject(hdc, oldPen));
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}
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