Surface8u convertGdiplusBitmap( Gdiplus::Bitmap &bitmap )
{
Gdiplus::BitmapData bitmapData;
Gdiplus::Rect rect( 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
Gdiplus::PixelFormat requestedFormat = bitmap.GetPixelFormat();
SurfaceChannelOrder sco;
bool premult;
gdiplusPixelFormatToSurfaceChannelOrder( requestedFormat, &sco, &premult );
if( sco == SurfaceChannelOrder::UNSPECIFIED ) {
UINT flags = bitmap.GetFlags();
sco = ( flags & Gdiplus::ImageFlagsHasAlpha ) ? SurfaceChannelOrder::BGRA : SurfaceChannelOrder::BGR;
requestedFormat = ( flags & Gdiplus::ImageFlagsHasAlpha ) ? PixelFormat32bppARGB : PixelFormat24bppRGB;
}
bitmap.LockBits( &rect, Gdiplus::ImageLockModeRead, requestedFormat, &bitmapData );
Surface8u result( bitmap.GetWidth(), bitmap.GetHeight(), sco.hasAlpha(), sco );
const uint8_t *srcDataBase = (uint8_t*)bitmapData.Scan0;
int32_t width = bitmap.GetWidth();
for( uint32_t y = 0; y < bitmap.GetHeight(); ++y ) {
memcpy( result.getData( Vec2i( 0, y ) ), srcDataBase + y * bitmapData.Stride, width * result.getPixelInc() );
}
bitmap.UnlockBits( &bitmapData );
return result;
}
SurfaceT<T>::SurfaceT( int32_t aWidth, int32_t aHeight, bool alpha, SurfaceChannelOrder aChannelOrder )
{
SurfaceChannelOrder channelOrder = aChannelOrder;
if( channelOrder == SurfaceChannelOrder::UNSPECIFIED )
channelOrder = ( alpha ) ? SurfaceChannelOrder::RGBA : SurfaceChannelOrder::RGB;
int32_t rowBytes = aWidth * sizeof(T) * channelOrder.getPixelInc();
T *data = new T[aHeight * rowBytes];
mObj = std::shared_ptr<Obj>( new Obj( aWidth, aHeight, channelOrder, data, true, rowBytes ) );
}
void Texture::SurfaceChannelOrderToDataFormatAndType( const SurfaceChannelOrder &sco, GLint *dataFormat, GLenum *type )
{
switch( sco.getCode() ) {
case SurfaceChannelOrder::RGB:
*dataFormat = GL_RGB;
*type = GL_UNSIGNED_BYTE;
break;
case SurfaceChannelOrder::RGBA:
case SurfaceChannelOrder::RGBX:
*dataFormat = GL_RGBA;
*type = GL_UNSIGNED_BYTE;
break;
case SurfaceChannelOrder::BGRA:
case SurfaceChannelOrder::BGRX:
*dataFormat = GL_BGRA;
*type = GL_UNSIGNED_BYTE;
break;
#if ! defined( CINDER_GLES )
case SurfaceChannelOrder::BGR:
*dataFormat = GL_BGR;
*type = GL_UNSIGNED_BYTE;
break;
case SurfaceChannelOrder::ARGB:
*dataFormat = GL_BGRA;
*type = GL_UNSIGNED_INT_8_8_8_8;
break;
#endif // ! defined( CINDER_GLES )
default:
throw TextureDataExc( "Invalid channel order" ); // this is an unsupported channel order for a texture
break;
}
}
SurfaceCache( int32_t width, int32_t height, SurfaceChannelOrder sco, int numSurfaces )
: mWidth( width ), mHeight( height ), mSCO( sco )
{
for( int i = 0; i < numSurfaces; ++i ) {
mSurfaceData.push_back( std::shared_ptr<uint8_t>( new uint8_t[width*height*sco.getPixelInc()], std::default_delete<uint8_t[]>() ) );
mSurfaceUsed.push_back( false );
}
}
SurfaceCache( int32_t width, int32_t height, SurfaceChannelOrder sco, int numSurfaces )
: mWidth( width ), mHeight( height ), mSCO( sco )
{
for( int i = 0; i < numSurfaces; ++i ) {
mSurfaceData.push_back( std::shared_ptr<uint8_t>( new uint8_t[width*height*sco.getPixelInc()], checked_array_deleter<uint8_t>() ) );
mDeallocatorRefcon.push_back( make_pair( this, i ) );
mSurfaceUsed.push_back( false );
}
}
Gdiplus::PixelFormat surfaceChannelOrderToGdiplusPixelFormat( const SurfaceChannelOrder &sco, bool premultiplied )
{
switch( sco.getCode() ) {
case SurfaceChannelOrder::BGR:
return PixelFormat24bppRGB;
break;
case SurfaceChannelOrder::BGRX: // untested code path
return PixelFormat32bppRGB;
break;
case SurfaceChannelOrder::BGRA:
return ( premultiplied ) ? PixelFormat32bppPARGB : PixelFormat32bppARGB;
break;
default:
return PixelFormatUndefined;
}
}
int32_t SurfaceConstraintsCairo::getRowBytes( int requestedWidth, const SurfaceChannelOrder &sco, int elementSize ) const {
return cairo_format_stride_for_width( sco.hasAlpha() ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24, requestedWidth );
}