openMSX
Public Member Functions | List of all members
openmsx::SuperImposedVideoFrame< Pixel > Class Template Referencefinal

This class represents a frame that is the (per-pixel) alpha-blend of a (laser-disc) video frame and a V99x8 (or tms9918) video frame. More...

#include <SuperImposedVideoFrame.hh>

Inheritance diagram for openmsx::SuperImposedVideoFrame< Pixel >:
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Collaboration diagram for openmsx::SuperImposedVideoFrame< Pixel >:
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Public Member Functions

 SuperImposedVideoFrame (const FrameSource &src, const FrameSource &super, const PixelOperations< Pixel > &pixelOps)
 
unsigned getLineWidth (unsigned line) const override
 Gets the number of display pixels on the given line. More...
 
const void * getLineInfo (unsigned line, unsigned &width, void *buf, unsigned bufWidth) const override
 Abstract implementation of getLinePtr(). More...
 
- Public Member Functions inherited from openmsx::FrameSource
void init (FieldType fieldType_)
 (Re)initialize an existing FrameSource. More...
 
FieldType getField () const
 Gets the role this frame plays in interlacing. More...
 
unsigned getHeight () const
 Gets the number of lines in this frame. More...
 
unsigned getWidth () const
 Get the width of (all) lines in this frame. More...
 
template<typename Pixel >
Pixel getLineColor (unsigned line) const
 Get the (single) color of the given line. More...
 
template<typename Pixel >
const PixelgetLinePtr (int line, unsigned width, Pixel *buf) const
 Gets a pointer to the pixels of the given line number. More...
 
template<typename Pixel >
const PixelgetMultiLinePtr (int line, unsigned numLines, unsigned &actualLines, unsigned width, Pixel *buf) const
 Similar to the above getLinePtr() method, but now tries to get multiple lines at once. More...
 
template<typename Pixel >
const PixelgetLinePtr320_240 (unsigned line, Pixel *buf) const
 Get a pointer to a given line in this frame, the frame is scaled to 320x240 pixels. More...
 
template<typename Pixel >
const PixelgetLinePtr640_480 (unsigned line, Pixel *buf) const
 Get a pointer to a given line in this frame, the frame is scaled to 640x480 pixels. More...
 
template<typename Pixel >
const PixelgetLinePtr960_720 (unsigned line, Pixel *buf) const
 Get a pointer to a given line in this frame, the frame is scaled to 960x720 pixels. More...
 
virtual unsigned getRowLength () const
 Returns the distance (in pixels) between two consecutive lines. More...
 
const SDL_PixelFormat & getSDLPixelFormat () const
 

Additional Inherited Members

- Public Types inherited from openmsx::FrameSource
enum  FieldType { FIELD_NONINTERLACED, FIELD_EVEN, FIELD_ODD }
 What role does this frame play in interlacing? More...
 
- Protected Member Functions inherited from openmsx::FrameSource
 FrameSource (const SDL_PixelFormat &format)
 
 ~FrameSource ()=default
 
void setHeight (unsigned height_)
 
virtual bool hasContiguousStorage () const
 Returns true when two consecutive rows are also consecutive in memory. More...
 
template<typename Pixel >
void scaleLine (const Pixel *in, Pixel *out, unsigned inWidth, unsigned outWidth) const
 

Detailed Description

template<typename Pixel>
class openmsx::SuperImposedVideoFrame< Pixel >

This class represents a frame that is the (per-pixel) alpha-blend of a (laser-disc) video frame and a V99x8 (or tms9918) video frame.

This is different from a generic 'SuperImposedFrame' class because it always outputs the resolution of the MSX frame. Except for the top/bottom border line, there we return a line with width=320. So usually this means the laserdisc video gets downscaled to 320x240 resolution. The rational for this was that we want the scalers to work on the proper MSX resolution. So the MSX graphics get scaled in the same way whether superimpose is enabled or not.

Definition at line 20 of file SuperImposedVideoFrame.hh.

Constructor & Destructor Documentation

◆ SuperImposedVideoFrame()

template<typename Pixel >
openmsx::SuperImposedVideoFrame< Pixel >::SuperImposedVideoFrame ( const FrameSource src,
const FrameSource super,
const PixelOperations< Pixel > &  pixelOps 
)

Member Function Documentation

◆ getLineInfo()

template<typename Pixel >
const void * openmsx::SuperImposedVideoFrame< Pixel >::getLineInfo ( unsigned  line,
unsigned &  lineWidth,
void *  buf,
unsigned  bufWidth 
) const
overridevirtual

Abstract implementation of getLinePtr().

Pixel type is unspecified (implementations that care about the exact type should get it via some other mechanism).

Parameters
lineThe line number for the requisted line.
lineWidthOutput parameter, the width of the returned line in pixel units.
bufBuffer space that can optionally be used by the implementation.
bufWidthThe size of the above buffer, in pixel units.
Returns
Pointer to the first pixel of the requested line. This might be the same as the given 'buf' parameter or it might be some internal buffer.

Implements openmsx::FrameSource.

Definition at line 28 of file SuperImposedVideoFrame.cc.

References openmsx::FrameSource::getHeight(), openmsx::FrameSource::getLineInfo(), openmsx::FrameSource::getLinePtr(), and VLA_SSE_ALIGNED.

◆ getLineWidth()

template<typename Pixel >
unsigned openmsx::SuperImposedVideoFrame< Pixel >::getLineWidth ( unsigned  line) const
overridevirtual

Gets the number of display pixels on the given line.

Returns
line width (=1 for a vertical border line)

Implements openmsx::FrameSource.

Definition at line 21 of file SuperImposedVideoFrame.cc.

References openmsx::FrameSource::getLineWidth().

Referenced by openmsx::Blur_1on3< Pixel >::operator()(), openmsx::RGBTriplet3xScaler< Pixel >::scaleImage(), and openmsx::Simple2xScaler< Pixel >::Simple2xScaler().


The documentation for this class was generated from the following files: