2 # include <simgear_config.h>
12 #include <string.h> // memcpy()
15 #include <simgear/xgl/xgl.h>
17 #include "GLBitmaps.h"
19 GlBitmap::GlBitmap( GLenum mode, GLint width, GLint height, GLubyte *bitmap )
20 : m_bytesPerPixel(mode==GL_RGB?3:4), m_width(width), m_height(height), m_bitmap(NULL)
22 m_bitmapSize = m_bytesPerPixel*m_width*m_height;
26 glGetIntegerv( GL_VIEWPORT, vp );
29 m_bitmapSize = m_bytesPerPixel*m_width*m_height;
31 m_bitmap = (GLubyte *)malloc( m_bitmapSize );
32 if ( bitmap ) memcpy( m_bitmap, bitmap, m_bitmapSize );
33 else glReadPixels( 0,0, m_width,m_height, mode, GL_UNSIGNED_BYTE, m_bitmap );
36 GlBitmap::~GlBitmap( )
38 if ( m_bitmap ) free( m_bitmap );
41 GLubyte *GlBitmap::getBitmap()
46 void GlBitmap::copyBitmap( GlBitmap *from, GLint at_x, GLint at_y )
48 GLint newWidth = at_x + from->m_width;
49 GLint newHeight = at_y + from->m_height;
50 if ( newWidth < m_width ) newWidth = m_width;
51 if ( newHeight < m_height ) newHeight = m_height;
52 m_bitmapSize = m_bytesPerPixel*newWidth*newHeight;
53 GLubyte *newBitmap = (GLubyte *)malloc( m_bitmapSize );
55 for ( y=0; y<m_height; y++ )
57 GLubyte *s = m_bitmap + m_bytesPerPixel * (y * m_width);
58 GLubyte *d = newBitmap + m_bytesPerPixel * (y * newWidth);
59 memcpy( d, s, m_bytesPerPixel * m_width );
65 for ( y=0; y<from->m_height; y++ )
67 GLubyte *s = from->m_bitmap + from->m_bytesPerPixel * (y * from->m_width);
68 GLubyte *d = m_bitmap + m_bytesPerPixel * ((at_y+y) * m_width + at_x);
69 for ( x=0; x<from->m_width; x++ )
74 if ( m_bytesPerPixel == 4 )
76 d[3] = (from->m_bytesPerPixel == 4) ? s[3] : 0;
78 s += from->m_bytesPerPixel;