2 # include <simgear_config.h>
12 #include <string.h> // memcpy()
14 #include "GLBitmaps.h"
16 GlBitmap::GlBitmap( GLenum mode, GLint width, GLint height, GLubyte *bitmap )
17 : m_bytesPerPixel(mode==GL_RGB?3:4), m_width(width), m_height(height), m_bitmap(NULL)
19 m_bitmapSize = m_bytesPerPixel*m_width*m_height;
23 glGetIntegerv( GL_VIEWPORT, vp );
26 m_bitmapSize = m_bytesPerPixel*m_width*m_height;
28 m_bitmap = (GLubyte *)malloc( m_bitmapSize );
29 if ( bitmap ) memcpy( m_bitmap, bitmap, m_bitmapSize );
30 else glReadPixels( 0,0, m_width,m_height, mode, GL_UNSIGNED_BYTE, m_bitmap );
33 GlBitmap::~GlBitmap( )
35 if ( m_bitmap ) free( m_bitmap );
38 GLubyte *GlBitmap::getBitmap()
43 void GlBitmap::copyBitmap( GlBitmap *from, GLint at_x, GLint at_y )
45 GLint newWidth = at_x + from->m_width;
46 GLint newHeight = at_y + from->m_height;
47 if ( newWidth < m_width ) newWidth = m_width;
48 if ( newHeight < m_height ) newHeight = m_height;
49 m_bitmapSize = m_bytesPerPixel*newWidth*newHeight;
50 GLubyte *newBitmap = (GLubyte *)malloc( m_bitmapSize );
52 for ( y=0; y<m_height; y++ )
54 GLubyte *s = m_bitmap + m_bytesPerPixel * (y * m_width);
55 GLubyte *d = newBitmap + m_bytesPerPixel * (y * newWidth);
56 memcpy( d, s, m_bytesPerPixel * m_width );
62 for ( y=0; y<from->m_height; y++ )
64 GLubyte *s = from->m_bitmap + from->m_bytesPerPixel * (y * from->m_width);
65 GLubyte *d = m_bitmap + m_bytesPerPixel * ((at_y+y) * m_width + at_x);
66 for ( x=0; x<from->m_width; x++ )
71 if ( m_bytesPerPixel == 4 )
73 d[3] = (from->m_bytesPerPixel == 4) ? s[3] : 0;
75 s += from->m_bytesPerPixel;