164 lines
3.5 KiB
C
164 lines
3.5 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* GDI Line Functions
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*
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* Copyright 2010-2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <freerdp/freerdp.h>
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#include <freerdp/gdi/gdi.h>
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#include <freerdp/gdi/32bpp.h>
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#include <freerdp/gdi/16bpp.h>
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#include <freerdp/gdi/8bpp.h>
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#include <freerdp/gdi/line.h>
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p_LineTo LineTo_[5] =
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{
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NULL,
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LineTo_8bpp,
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LineTo_16bpp,
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NULL,
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LineTo_32bpp
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};
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/**
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* Draw a line from the current position to the given position.\n
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* @msdn{dd145029}
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* @param hdc device context
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* @param nXEnd ending x position
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* @param nYEnd ending y position
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* @return nonzero if successful, 0 otherwise
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*/
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BOOL gdi_LineTo(HGDI_DC hdc, int nXEnd, int nYEnd)
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{
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p_LineTo _LineTo = LineTo_[IBPP(hdc->bitsPerPixel)];
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if (_LineTo == NULL)
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return FALSE;
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return _LineTo(hdc, nXEnd, nYEnd);
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}
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/**
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* Draw one or more straight lines
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* @param hdc device context
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* @param lppt array of points
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* @param cCount number of points
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* @return nonzero on success, 0 otherwise
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*/
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BOOL gdi_PolylineTo(HGDI_DC hdc, GDI_POINT *lppt, DWORD cCount)
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{
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DWORD i;
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for (i = 0; i < cCount; i++)
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{
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if (!gdi_LineTo(hdc, lppt[i].x, lppt[i].y))
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return FALSE;
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if (!gdi_MoveToEx(hdc, lppt[i].x, lppt[i].y, NULL))
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return FALSE;
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}
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return TRUE;
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}
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/**
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* Draw one or more straight lines
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* @param hdc device context
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* @param lppt array of points
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* @param cPoints number of points
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* @return nonzero on success, 0 otherwise
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*/
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BOOL gdi_Polyline(HGDI_DC hdc, GDI_POINT *lppt, int cPoints)
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{
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if (cPoints > 0)
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{
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int i;
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GDI_POINT pt;
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if (!gdi_MoveToEx(hdc, lppt[0].x, lppt[0].y, &pt))
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return FALSE;
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for (i = 0; i < cPoints; i++)
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{
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if (!gdi_LineTo(hdc, lppt[i].x, lppt[i].y))
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return FALSE;
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if (!gdi_MoveToEx(hdc, lppt[i].x, lppt[i].y, NULL))
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return FALSE;
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}
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if (!gdi_MoveToEx(hdc, pt.x, pt.y, NULL))
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return FALSE;
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}
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return TRUE;
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}
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/**
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* Draw multiple series of connected line segments
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* @param hdc device context
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* @param lppt array of points
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* @param lpdwPolyPoints array of numbers of points per series
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* @param cCount count of entries in lpdwPolyPoints
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* @return nonzero on success, 0 otherwise
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*/
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BOOL gdi_PolyPolyline(HGDI_DC hdc, GDI_POINT *lppt, int *lpdwPolyPoints, DWORD cCount)
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{
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int cPoints;
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DWORD i, j = 0;
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for (i = 0; i < cCount; i++)
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{
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cPoints = lpdwPolyPoints[i];
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if (!gdi_Polyline(hdc, &lppt[j], cPoints))
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return FALSE;
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j += cPoints;
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}
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return TRUE;
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}
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/**
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* Move pen from the current device context to a new position.
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* @param hdc device context
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* @param X x position
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* @param Y y position
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* @return nonzero on success, 0 otherwise
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*/
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BOOL gdi_MoveToEx(HGDI_DC hdc, int X, int Y, HGDI_POINT lpPoint)
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{
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if (lpPoint != NULL)
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{
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lpPoint->x = hdc->pen->posX;
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lpPoint->y = hdc->pen->posY;
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}
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hdc->pen->posX = X;
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hdc->pen->posY = Y;
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return TRUE;
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}
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