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10 // Intel License Agreement
11 // For Open Source Computer Vision Library
12 //
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40 //M*/
41
42 //
43 // Image.cpp: implementation of the CvvImage class.
44 //
45 //////////////////////////////////////////////////////////////////////
46
47 #include "_highgui.h"
48
49 #if defined __cplusplus && (!defined WIN32 || !defined __GNUC__)
50
51 //////////////////////////////////////////////////////////////////////
52 // Construction/Destruction
53 //////////////////////////////////////////////////////////////////////
54
CvvImage()55 CvvImage::CvvImage()
56 {
57 m_img = 0;
58 }
59
Destroy()60 void CvvImage::Destroy()
61 {
62 cvReleaseImage( &m_img );
63 }
64
~CvvImage()65 CvvImage::~CvvImage()
66 {
67 Destroy();
68 }
69
Create(int w,int h,int bpp,int origin)70 bool CvvImage::Create( int w, int h, int bpp, int origin )
71 {
72 const unsigned max_img_size = 10000;
73
74 if( (bpp != 8 && bpp != 24 && bpp != 32) ||
75 (unsigned)w >= max_img_size || (unsigned)h >= max_img_size ||
76 (origin != IPL_ORIGIN_TL && origin != IPL_ORIGIN_BL))
77 {
78 assert(0); // most probably, it is a programming error
79 return false;
80 }
81
82 if( !m_img || Bpp() != bpp || m_img->width != w || m_img->height != h )
83 {
84 if( m_img && m_img->nSize == sizeof(IplImage))
85 Destroy();
86
87 /* prepare IPL header */
88 m_img = cvCreateImage( cvSize( w, h ), IPL_DEPTH_8U, bpp/8 );
89 }
90
91 if( m_img )
92 m_img->origin = origin == 0 ? IPL_ORIGIN_TL : IPL_ORIGIN_BL;
93
94 return m_img != 0;
95 }
96
CopyOf(CvvImage & image,int desired_color)97 void CvvImage::CopyOf( CvvImage& image, int desired_color )
98 {
99 IplImage* img = image.GetImage();
100 if( img )
101 {
102 CopyOf( img, desired_color );
103 }
104 }
105
106
107 #define HG_IS_IMAGE(img) \
108 ((img) != 0 && ((const IplImage*)(img))->nSize == sizeof(IplImage) && \
109 ((IplImage*)img)->imageData != 0)
110
111
CopyOf(IplImage * img,int desired_color)112 void CvvImage::CopyOf( IplImage* img, int desired_color )
113 {
114 if( HG_IS_IMAGE(img) )
115 {
116 int color = desired_color;
117 CvSize size = cvGetSize( img );
118
119 if( color < 0 )
120 color = img->nChannels > 1;
121
122 if( Create( size.width, size.height,
123 (!color ? 1 : img->nChannels > 1 ? img->nChannels : 3)*8,
124 img->origin ))
125 {
126 cvConvertImage( img, m_img, 0 );
127 }
128 }
129 }
130
131
Load(const char * filename,int desired_color)132 bool CvvImage::Load( const char* filename, int desired_color )
133 {
134 IplImage* img = cvLoadImage( filename, desired_color );
135 if( !img )
136 return false;
137
138 CopyOf( img, desired_color );
139 cvReleaseImage( &img );
140
141 return true;
142 }
143
144
LoadRect(const char * filename,int desired_color,CvRect r)145 bool CvvImage::LoadRect( const char* filename,
146 int desired_color, CvRect r )
147 {
148 if( r.width < 0 || r.height < 0 ) return false;
149
150 IplImage* img = cvLoadImage( filename, desired_color );
151 if( !img )
152 return false;
153
154 if( r.width == 0 || r.height == 0 )
155 {
156 r.width = img->width;
157 r.height = img->height;
158 r.x = r.y = 0;
159 }
160
161 if( r.x > img->width || r.y > img->height ||
162 r.x + r.width < 0 || r.y + r.height < 0 )
163 {
164 cvReleaseImage( &img );
165 return false;
166 }
167
168 /* truncate r to source image */
169 if( r.x < 0 )
170 {
171 r.width += r.x;
172 r.x = 0;
173 }
174 if( r.y < 0 )
175 {
176 r.height += r.y;
177 r.y = 0;
178 }
179
180 if( r.x + r.width > img->width )
181 r.width = img->width - r.x;
182
183 if( r.y + r.height > img->height )
184 r.height = img->height - r.y;
185
186 cvSetImageROI( img, r );
187 CopyOf( img, desired_color );
188
189 cvReleaseImage( &img );
190 return true;
191 }
192
193
Save(const char * filename)194 bool CvvImage::Save( const char* filename )
195 {
196 if( !m_img )
197 return false;
198 cvSaveImage( filename, m_img );
199 return true;
200 }
201
202
203
204 #ifdef WIN32
205
DrawToHDC(HDC hDCDst,RECT * pDstRect)206 void CImage::DrawToHDC( HDC hDCDst, RECT* pDstRect )
207 {
208 if( pDstRect && m_img && m_img->depth == IPL_DEPTH_8U && m_img->imageData )
209 {
210 uchar buffer[sizeof(BITMAPINFOHEADER) + 1024];
211 BITMAPINFO* bmi = (BITMAPINFO*)buffer;
212 int bmp_w = m_img->width, bmp_h = m_img->height;
213
214 CvRect roi = cvGetImageROI( m_img );
215 CvRect dst = RectToCvRect( *pDstRect );
216
217 if( roi.width == dst.width && roi.height == dst.height )
218 {
219 Show( hDCDst, dst.x, dst.y, dst.width, dst.height, roi.x, roi.y );
220 return;
221 }
222
223 if( roi.width > dst.width )
224 {
225 SetStretchBltMode(
226 hDCDst, // handle to device context
227 HALFTONE );
228 }
229 else
230 {
231 SetStretchBltMode(
232 hDCDst, // handle to device context
233 COLORONCOLOR );
234 }
235
236 FillBitmapInfo( bmi, bmp_w, bmp_h, Bpp(), m_img->origin );
237
238 ::StretchDIBits(
239 hDCDst,
240 dst.x, dst.y, dst.width, dst.height,
241 roi.x, roi.y, roi.width, roi.height,
242 m_img->imageData, bmi, DIB_RGB_COLORS, SRCCOPY );
243 }
244 }
245
246 #endif
247
Fill(int color)248 void CvvImage::Fill( int color )
249 {
250 cvSet( m_img, cvScalar(color&255,(color>>8)&255,(color>>16)&255,(color>>24)&255) );
251 }
252
253 #endif
254
255 /* End of file. */
256