mirror of https://github.com/FreeRDP/FreeRDP
488 lines
10 KiB
C
488 lines
10 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* GDI Region Functions
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*
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* Copyright 2010-2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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* Copyright 2016 Armin Novak <armin.novak@thincast.com>
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* Copyright 2016 Thincast Technologies GmbH
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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/api.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/region.h>
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#include <freerdp/log.h>
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#define TAG FREERDP_TAG("gdi.region")
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/**
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* Create a region from rectangular coordinates.\n
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* @msdn{dd183514}
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* @param nLeftRect x1
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* @param nTopRect y1
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* @param nRightRect x2
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* @param nBottomRect y2
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* @return new region
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*/
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HGDI_RGN gdi_CreateRectRgn(INT32 nLeftRect, INT32 nTopRect,
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INT32 nRightRect, INT32 nBottomRect)
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{
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HGDI_RGN hRgn = (HGDI_RGN) calloc(1, sizeof(GDI_RGN));
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if (!hRgn)
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return NULL;
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hRgn->objectType = GDIOBJECT_REGION;
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hRgn->x = nLeftRect;
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hRgn->y = nTopRect;
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hRgn->w = nRightRect - nLeftRect + 1;
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hRgn->h = nBottomRect - nTopRect + 1;
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hRgn->null = FALSE;
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return hRgn;
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}
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/**
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* Create a new rectangle.
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* @param xLeft x1
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* @param yTop y1
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* @param xRight x2
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* @param yBottom y2
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* @return new rectangle
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*/
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HGDI_RECT gdi_CreateRect(INT32 xLeft, INT32 yTop,
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INT32 xRight, INT32 yBottom)
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{
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HGDI_RECT hRect = (HGDI_RECT) calloc(1, sizeof(GDI_RECT));
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if (!hRect)
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return NULL;
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hRect->objectType = GDIOBJECT_RECT;
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hRect->left = xLeft;
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hRect->top = yTop;
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hRect->right = xRight;
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hRect->bottom = yBottom;
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return hRect;
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}
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/**
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* Convert a rectangle to a region.
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* @param rect source rectangle
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* @param rgn destination region
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*/
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INLINE void gdi_RectToRgn(HGDI_RECT rect, HGDI_RGN rgn)
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{
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rgn->x = rect->left;
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rgn->y = rect->top;
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rgn->w = rect->right - rect->left + 1;
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rgn->h = rect->bottom - rect->top + 1;
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}
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/**
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* Convert rectangular coordinates to a region.
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* @param left x1
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* @param top y1
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* @param right x2
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* @param bottom y2
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* @param rgn destination region
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*/
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INLINE void gdi_CRectToRgn(INT32 left, INT32 top,
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INT32 right, INT32 bottom, HGDI_RGN rgn)
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{
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rgn->x = left;
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rgn->y = top;
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rgn->w = right - left + 1;
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rgn->h = bottom - top + 1;
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}
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/**
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* Convert a rectangle to region coordinates.
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* @param rect source rectangle
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* @param x x1
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* @param y y1
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* @param w width
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* @param h height
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*/
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INLINE void gdi_RectToCRgn(const HGDI_RECT rect,
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INT32* x, INT32* y,
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INT32* w, INT32* h)
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{
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*x = rect->left;
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*y = rect->top;
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*w = rect->right - rect->left + 1;
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*h = rect->bottom - rect->top + 1;
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}
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/**
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* Convert rectangular coordinates to region coordinates.
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* @param left x1
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* @param top y1
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* @param right x2
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* @param bottom y2
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* @param x x1
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* @param y y1
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* @param w width
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* @param h height
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*/
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INLINE void gdi_CRectToCRgn(INT32 left, INT32 top, INT32 right,
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INT32 bottom,
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INT32* x, INT32* y, INT32* w, INT32* h)
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{
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*x = left;
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*y = top;
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*w = right - left + 1;
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*h = bottom - top + 1;
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}
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/**
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* Convert a region to a rectangle.
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* @param rgn source region
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* @param rect destination rectangle
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*/
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INLINE void gdi_RgnToRect(HGDI_RGN rgn, HGDI_RECT rect)
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{
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rect->left = rgn->x;
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rect->top = rgn->y;
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rect->right = rgn->x + rgn->w - 1;
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rect->bottom = rgn->y + rgn->h - 1;
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}
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/**
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* Convert region coordinates to a rectangle.
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* @param x x1
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* @param y y1
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* @param w width
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* @param h height
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* @param rect destination rectangle
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*/
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INLINE void gdi_CRgnToRect(INT64 x, INT64 y, INT32 w, INT32 h,
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HGDI_RECT rect)
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{
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BOOL invalid = FALSE;
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const INT64 r = x + w - 1;
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const INT64 b = y + h - 1;
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rect->left = (x > 0) ? x : 0;
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rect->top = (y > 0) ? y : 0;
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rect->right = rect->left;
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rect->bottom = rect->top;
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if (r > 0)
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rect->right = r;
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else
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invalid = TRUE;
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if (b > 0)
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rect->bottom = b;
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else
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invalid = TRUE;
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if (invalid)
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{
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WLog_DBG(TAG, "Invisible rectangle %"PRId64"x%"PRId64"-%"PRId64"x%"PRId64,
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x, y, r, b);
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}
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}
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/**
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* Convert a region to rectangular coordinates.
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* @param rgn source region
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* @param left x1
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* @param top y1
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* @param right x2
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* @param bottom y2
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*/
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INLINE void gdi_RgnToCRect(HGDI_RGN rgn, INT32* left, INT32* top,
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INT32* right, INT32* bottom)
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{
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*left = rgn->x;
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*top = rgn->y;
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*right = rgn->x + rgn->w - 1;
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*bottom = rgn->y + rgn->h - 1;
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}
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/**
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* Convert region coordinates to rectangular coordinates.
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* @param x x1
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* @param y y1
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* @param w width
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* @param h height
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* @param left x1
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* @param top y1
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* @param right x2
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* @param bottom y2
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*/
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INLINE void gdi_CRgnToCRect(INT32 x, INT32 y, INT32 w, INT32 h,
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INT32* left, INT32* top, INT32* right, INT32* bottom)
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{
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*left = x;
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*top = y;
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*right = 0;
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if (w > 0)
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*right = x + w - 1;
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else
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WLog_ERR(TAG, "Invalid width");
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*bottom = 0;
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if (h > 0)
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*bottom = y + h - 1;
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else
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WLog_ERR(TAG, "Invalid height");
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}
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/**
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* Check if copying would involve overlapping regions
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* @param x x1
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* @param y y1
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* @param width width
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* @param height height
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* @param srcx source x1
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* @param srcy source y1
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* @return nonzero if there is an overlap, 0 otherwise
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*/
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INLINE BOOL gdi_CopyOverlap(INT32 x, INT32 y, INT32 width, INT32 height,
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INT32 srcx, INT32 srcy)
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{
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GDI_RECT dst;
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GDI_RECT src;
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gdi_CRgnToRect(x, y, width, height, &dst);
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gdi_CRgnToRect(srcx, srcy, width, height, &src);
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return (dst.right >= src.left && dst.left <= src.right &&
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dst.bottom >= src.top && dst.top <= src.bottom) ? TRUE : FALSE;
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}
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/**
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* Set the coordinates of a given rectangle.\n
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* @msdn{dd145085}
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* @param rc rectangle
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* @param xLeft x1
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* @param yTop y1
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* @param xRight x2
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* @param yBottom y2
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* @return nonzero if successful, 0 otherwise
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*/
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INLINE BOOL gdi_SetRect(HGDI_RECT rc, INT32 xLeft, INT32 yTop,
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INT32 xRight, INT32 yBottom)
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{
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rc->left = xLeft;
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rc->top = yTop;
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rc->right = xRight;
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rc->bottom = yBottom;
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return TRUE;
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}
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/**
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* Set the coordinates of a given region.
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* @param hRgn region
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* @param nXLeft x1
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* @param nYLeft y1
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* @param nWidth width
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* @param nHeight height
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* @return nonzero if successful, 0 otherwise
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*/
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INLINE BOOL gdi_SetRgn(HGDI_RGN hRgn, INT32 nXLeft, INT32 nYLeft,
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INT32 nWidth, INT32 nHeight)
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{
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hRgn->x = nXLeft;
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hRgn->y = nYLeft;
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hRgn->w = nWidth;
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hRgn->h = nHeight;
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hRgn->null = FALSE;
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return TRUE;
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}
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/**
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* Convert rectangular coordinates to a region
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* @param hRgn destination region
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* @param nLeftRect x1
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* @param nTopRect y1
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* @param nRightRect x2
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* @param nBottomRect y2
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* @return nonzero if successful, 0 otherwise
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*/
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INLINE BOOL gdi_SetRectRgn(HGDI_RGN hRgn, INT32 nLeftRect, INT32 nTopRect,
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INT32 nRightRect, INT32 nBottomRect)
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{
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gdi_CRectToRgn(nLeftRect, nTopRect, nRightRect, nBottomRect, hRgn);
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hRgn->null = FALSE;
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return TRUE;
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}
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/**
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* Compare two regions for equality.\n
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* @msdn{dd162700}
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* @param hSrcRgn1 first region
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* @param hSrcRgn2 second region
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* @return nonzero if both regions are equal, 0 otherwise
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*/
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INLINE BOOL gdi_EqualRgn(HGDI_RGN hSrcRgn1, HGDI_RGN hSrcRgn2)
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{
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if ((hSrcRgn1->x == hSrcRgn2->x) &&
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(hSrcRgn1->y == hSrcRgn2->y) &&
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(hSrcRgn1->w == hSrcRgn2->w) &&
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(hSrcRgn1->h == hSrcRgn2->h))
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{
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return TRUE;
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}
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return FALSE;
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}
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/**
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* Copy coordinates from a rectangle to another rectangle
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* @msdn{dd183481}
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* @param dst destination rectangle
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* @param src source rectangle
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* @return nonzero if successful, 0 otherwise
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*/
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INLINE BOOL gdi_CopyRect(HGDI_RECT dst, HGDI_RECT src)
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{
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dst->left = src->left;
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dst->top = src->top;
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dst->right = src->right;
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dst->bottom = src->bottom;
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return TRUE;
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}
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/**
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* Check if a point is inside a rectangle.\n
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* @msdn{dd162882}
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* @param rc rectangle
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* @param x point x position
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* @param y point y position
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* @return nonzero if the point is inside, 0 otherwise
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*/
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INLINE BOOL gdi_PtInRect(HGDI_RECT rc, INT32 x, INT32 y)
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{
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/*
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* points on the left and top sides are considered in,
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* while points on the right and bottom sides are considered out
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*/
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if (x >= rc->left && x <= rc->right)
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{
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if (y >= rc->top && y <= rc->bottom)
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{
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return TRUE;
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}
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}
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return FALSE;
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}
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/**
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* Invalidate a given region, such that it is redrawn on the next region update.\n
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* @msdn{dd145003}
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* @param hdc device context
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* @param x x1
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* @param y y1
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* @param w width
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* @param h height
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* @return nonzero on success, 0 otherwise
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*/
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INLINE BOOL gdi_InvalidateRegion(HGDI_DC hdc, INT32 x, INT32 y, INT32 w,
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INT32 h)
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{
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GDI_RECT inv;
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GDI_RECT rgn;
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HGDI_RGN invalid;
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HGDI_RGN cinvalid;
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if (!hdc->hwnd)
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return TRUE;
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if (!hdc->hwnd->invalid)
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return TRUE;
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if (w == 0 || h == 0)
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return TRUE;
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cinvalid = hdc->hwnd->cinvalid;
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if ((hdc->hwnd->ninvalid + 1) > (INT64)hdc->hwnd->count)
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{
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int new_cnt;
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HGDI_RGN new_rgn;
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new_cnt = hdc->hwnd->count * 2;
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new_rgn = (HGDI_RGN) realloc(cinvalid, sizeof(GDI_RGN) * new_cnt);
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if (!new_rgn)
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return FALSE;
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hdc->hwnd->count = new_cnt;
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cinvalid = new_rgn;
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}
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gdi_SetRgn(&cinvalid[hdc->hwnd->ninvalid++], x, y, w, h);
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hdc->hwnd->cinvalid = cinvalid;
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invalid = hdc->hwnd->invalid;
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if (invalid->null)
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{
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invalid->x = x;
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invalid->y = y;
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invalid->w = w;
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invalid->h = h;
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invalid->null = FALSE;
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return TRUE;
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}
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gdi_CRgnToRect(x, y, w, h, &rgn);
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gdi_RgnToRect(invalid, &inv);
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if (rgn.left < inv.left)
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inv.left = rgn.left;
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if (rgn.top < inv.top)
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inv.top = rgn.top;
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if (rgn.right > inv.right)
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inv.right = rgn.right;
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if (rgn.bottom > inv.bottom)
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inv.bottom = rgn.bottom;
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gdi_RectToRgn(&inv, invalid);
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return TRUE;
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}
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