Scaler2.cc

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#include "Scaler2.hh"
#include "LineScalers.hh"
#include "FrameSource.hh"
#include "SuperImposeScalerOutput.hh"
#include "unreachable.hh"
#include "vla.hh"
#include "build-info.hh"
#include <cassert>
#include <cstdint>
 
namespace openmsx {
 
template<std::unsigned_integral Pixel>
Scaler2<Pixel>::Scaler2(const PixelOperations<Pixel>& pixelOps_)
        : pixelOps(pixelOps_)
{
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scaleBlank1to2(
                FrameSource& src, unsigned srcStartY, unsigned /*srcEndY*/,
                ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        for (unsigned srcY = srcStartY, dstY = dstStartY;
             dstY < dstEndY; srcY += 1, dstY += 2) {
                auto color = src.getLineColor<Pixel>(srcY);
                dst.fillLine(dstY + 0, color);
                dst.fillLine(dstY + 1, color);
        }
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scaleBlank1to1(
                FrameSource& src, unsigned srcStartY, unsigned /*srcEndY*/,
                ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        for (unsigned srcY = srcStartY, dstY = dstStartY;
             dstY < dstEndY; srcY += 1, dstY += 1) {
                auto color = src.getLineColor<Pixel>(srcY);
                dst.fillLine(dstY, color);
        }
}
 
template<std::unsigned_integral Pixel>
static void doScale1(FrameSource& src,
        unsigned srcStartY, unsigned /*srcEndY*/, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY,
        PolyLineScaler<Pixel>& scale)
{
        VLA_SSE_ALIGNED(Pixel, buf, srcWidth);
        Scale_1on1<Pixel> copy;
        for (unsigned y = dstStartY; y < dstEndY; y += 2, ++srcStartY) {
                auto srcLine = src.getLine(srcStartY, buf);
                auto dstLine0 = dst.acquireLine(y + 0);
                scale(srcLine, dstLine0);
                auto dstLine1 = dst.acquireLine(y + 1);
                copy(dstLine0, dstLine1);
                dst.releaseLine(y + 0, dstLine0);
                dst.releaseLine(y + 1, dstLine1);
        }
}
 
template<std::unsigned_integral Pixel>
static void doScale2(FrameSource& src,
        unsigned srcStartY, unsigned /*srcEndY*/, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY,
        PolyLineScaler<Pixel>& scale)
{
        VLA_SSE_ALIGNED(Pixel, buf, srcWidth);
        for (unsigned srcY = srcStartY, dstY = dstStartY;
             dstY < dstEndY; ++dstY, ++srcY) {
                auto srcLine = src.getLine(srcY, buf);
                auto dstLine = dst.acquireLine(dstY);
                scale(srcLine, dstLine);
                dst.releaseLine(dstY, dstLine);
        }
}
 
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale1x1to3x2(FrameSource& src,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        PolyScale<Pixel, Scale_1on3<Pixel>> op;
        doScale1<Pixel>(src, srcStartY, srcEndY, srcWidth,
                        dst, dstStartY, dstEndY, op);
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale1x1to3x1(FrameSource& src,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        PolyScale<Pixel, Scale_1on3<Pixel>> op;
        doScale2<Pixel>(src, srcStartY, srcEndY, srcWidth,
                        dst, dstStartY, dstEndY, op);
}
 
// TODO: In theory it's nice to have this as a fallback method, but in practice
//       all subclasses override this method, so should we keep it or not?
//       And if we keep it, should it be commented out like this until we
//       need it to reduce the executable size?
//       See also Scaler3::scale256.
// TODO: Why won't it compile anymore without this method enabled?
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale1x1to2x2(FrameSource& src,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        PolyScale<Pixel, Scale_1on2<Pixel>> op;
        doScale1<Pixel>(src, srcStartY, srcEndY, srcWidth,
                        dst, dstStartY, dstEndY, op);
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale1x1to2x1(FrameSource& src,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        PolyScale<Pixel, Scale_1on2<Pixel>> op;
        doScale2<Pixel>(src, srcStartY, srcEndY, srcWidth,
                        dst, dstStartY, dstEndY, op);
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale2x1to3x2(FrameSource& src,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        PolyScale<Pixel, Scale_2on3<Pixel>> op(pixelOps);
        doScale1<Pixel>(src, srcStartY, srcEndY, srcWidth,
                        dst, dstStartY, dstEndY, op);
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale2x1to3x1(FrameSource& src,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        PolyScale<Pixel, Scale_2on3<Pixel>> op(pixelOps);
        doScale2<Pixel>(src, srcStartY, srcEndY, srcWidth,
                        dst, dstStartY, dstEndY, op);
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale1x1to1x2(FrameSource& src,
        unsigned srcStartY, unsigned /*srcEndY*/, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        // Optimized variant: possibly avoid copy.
        assert(dst.getWidth() == srcWidth); (void)srcWidth;
        Scale_1on1<Pixel> copy;
        for (unsigned y = dstStartY; y < dstEndY; y += 2, ++srcStartY) {
                auto dstLine0 = dst.acquireLine(y + 0);
                auto srcLine = src.getLine(srcStartY, dstLine0);
                if (srcLine.data() != dstLine0.data()) copy(srcLine, dstLine0);
                auto dstLine1 = dst.acquireLine(y + 1);
                copy(dstLine0, dstLine1);
                dst.releaseLine(y + 0, dstLine0);
                dst.releaseLine(y + 1, dstLine1);
        }
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale1x1to1x1(FrameSource& src,
        unsigned srcStartY, unsigned /*srcEndY*/, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        // Optimized variant: possibly avoid copy.
        assert(dst.getWidth() == srcWidth); (void)srcWidth;
        Scale_1on1<Pixel> copy;
        for (unsigned srcY = srcStartY, dstY = dstStartY;
             dstY < dstEndY; ++dstY, ++srcY) {
                auto dstLine = dst.acquireLine(dstY);
                auto srcLine = src.getLine(srcY, dstLine);
                if (srcLine.data() != dstLine.data()) copy(srcLine, dstLine);
                dst.releaseLine(dstY, dstLine);
        }
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale4x1to3x2(FrameSource& src,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        PolyScale<Pixel, Scale_4on3<Pixel>> op(pixelOps);
        doScale1<Pixel>(src, srcStartY, srcEndY, srcWidth,
                        dst, dstStartY, dstEndY, op);
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale4x1to3x1(FrameSource& src,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        PolyScale<Pixel, Scale_4on3<Pixel>> op(pixelOps);
        doScale2<Pixel>(src, srcStartY, srcEndY, srcWidth,
                        dst, dstStartY, dstEndY, op);
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale2x1to1x2(FrameSource& src,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        PolyScale<Pixel, Scale_2on1<Pixel>> op(pixelOps);
        doScale1<Pixel>(src, srcStartY, srcEndY, srcWidth,
                        dst, dstStartY, dstEndY, op);
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scale2x1to1x1(FrameSource& src,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        PolyScale<Pixel, Scale_2on1<Pixel>> op(pixelOps);
        doScale2<Pixel>(src, srcStartY, srcEndY, srcWidth,
                        dst, dstStartY, dstEndY, op);
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::dispatchScale(FrameSource& src,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        if (src.getHeight() == 240) {
                switch (srcWidth) {
                case 1:
                        scaleBlank1to2(src, srcStartY, srcEndY,
                                      dst, dstStartY, dstEndY);
                        break;
                case 213:
                        scale1x1to3x2(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                case 320:
                        scale1x1to2x2(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                case 426:
                        scale2x1to3x2(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                case 640:
                        scale1x1to1x2(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                case 853:
                        scale4x1to3x2(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                case 1280:
                        scale2x1to1x2(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                default:
                        UNREACHABLE;
                }
        } else {
                assert(src.getHeight() == 480);
                switch (srcWidth) {
                case 1:
                        scaleBlank1to1(src, srcStartY, srcEndY,
                                      dst, dstStartY, dstEndY);
                        break;
                case 213:
                        scale1x1to3x1(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                case 320:
                        scale1x1to2x1(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                case 426:
                        scale2x1to3x1(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                case 640:
                        scale1x1to1x1(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                case 853:
                        scale4x1to3x1(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                case 1280:
                        scale2x1to1x1(src, srcStartY, srcEndY, srcWidth,
                                      dst, dstStartY, dstEndY);
                        break;
                default:
                        UNREACHABLE;
                }
        }
}
 
template<std::unsigned_integral Pixel>
void Scaler2<Pixel>::scaleImage(FrameSource& src, const RawFrame* superImpose,
        unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
        ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY)
{
        if (superImpose) {
                SuperImposeScalerOutput<Pixel> dst2(
                        dst, *superImpose, pixelOps);
                dispatchScale(src, srcStartY, srcEndY, srcWidth,
                              dst2, dstStartY, dstEndY);
        } else {
                dispatchScale(src, srcStartY, srcEndY, srcWidth,
                              dst, dstStartY, dstEndY);
        }
}
 
// Force template instantiation.
#if HAVE_16BPP
template class Scaler2<uint16_t>;
#endif
#if HAVE_32BPP
template class Scaler2<uint32_t>;
#endif
 
} // namespace openmsx