dlls/gdiplus/graphics.c

   1 /*
   2  * Copyright (C) 2007 Google (Evan Stade)
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <stdarg.h>
  20 #include <math.h>
  21
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "winuser.h"
  25 #include "wingdi.h"
  26 #include "gdiplus.h"
  27 #include "gdiplus_private.h"
  28 #include "wine/debug.h"
  29
  30 GpStatus WINGDIPAPI GdipCreateFromHDC(HDC hdc, GpGraphics **graphics)
  31 {
  32     if(hdc == NULL)
  33         return OutOfMemory;
  34
  35     if(graphics == NULL)
  36         return InvalidParameter;
  37
  38     *graphics = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
  39         sizeof(GpGraphics));
  40     (*graphics)->hdc = hdc;
  41     (*graphics)->hwnd = NULL;
  42
  43     return Ok;
  44 }
  45
  46 GpStatus WINGDIPAPI GdipCreateFromHWND(HWND hwnd, GpGraphics **graphics)
  47 {
  48     GpStatus ret;
  49
  50     if((ret = GdipCreateFromHDC(GetDC(hwnd), graphics)) != Ok)
  51         return ret;
  52
  53     (*graphics)->hwnd = hwnd;
  54
  55     return Ok;
  56 }
  57
  58 GpStatus WINGDIPAPI GdipDeleteGraphics(GpGraphics *graphics)
  59 {
  60     if(!graphics) return InvalidParameter;
  61     if(graphics->hwnd)
  62         ReleaseDC(graphics->hwnd, graphics->hdc);
  63
  64     HeapFree(GetProcessHeap(), 0, graphics);
  65
  66     return Ok;
  67 }
  68
  69 GpStatus WINGDIPAPI GdipDrawLineI(GpGraphics *graphics, GpPen *pen, INT x1,
  70     INT y1, INT x2, INT y2)
  71 {
  72     HGDIOBJ old_obj;
  73
  74     if(!pen || !graphics)
  75         return InvalidParameter;
  76
  77     old_obj = SelectObject(graphics->hdc, pen->gdipen);
  78     MoveToEx(graphics->hdc, x1, y1, NULL);
  79     LineTo(graphics->hdc, x2, y2);
  80     SelectObject(graphics->hdc, old_obj);
  81
  82     return Ok;
  83 }
  84
  85 GpStatus WINGDIPAPI GdipDrawRectangleI(GpGraphics *graphics, GpPen *pen, INT x,
  86     INT y, INT width, INT height)
  87 {
  88     LOGBRUSH lb;
  89     HPEN hpen;
  90     HGDIOBJ old_obj;
  91
  92     if(!pen || !graphics)
  93         return InvalidParameter;
  94
  95     lb.lbStyle = BS_SOLID;
  96     lb.lbColor = pen->color;
  97     lb.lbHatch = 0;
  98
  99     hpen = ExtCreatePen(PS_GEOMETRIC | PS_ENDCAP_SQUARE, (INT) pen->width,
 100         &lb, 0, NULL);
 101
 102     old_obj = SelectObject(graphics->hdc, hpen);
 103
 104     /* assume pen aligment centered */
 105     MoveToEx(graphics->hdc, x, y, NULL);
 106     LineTo(graphics->hdc, x+width, y);
 107     LineTo(graphics->hdc, x+width, y+height);
 108     LineTo(graphics->hdc, x, y+height);
 109     LineTo(graphics->hdc, x, y);
 110
 111     SelectObject(graphics->hdc, old_obj);
 112     DeleteObject(hpen);
 113
 114     return Ok;
 115 }