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emu/rendersw.hxx: Get rid of obsolete overly specific blend function.

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This commit is contained in:
Vas Crabb 2024-11-22 12:46:57 +11:00
parent 1c50756b3a
commit bb305af46e
1 changed files with 0 additions and 97 deletions
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97
src/emu/rendersw.hxx
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@ -823,103 +823,6 @@ private:
}
//**************************************************************************
// 16-BIT YUY RASTERIZERS
//**************************************************************************
//-------------------------------------------------
// draw_quad_yuy16_none - perform
// rasterization of a 16bpp YUY image
//-------------------------------------------------
static void draw_quad_yuy16_none(render_primitive const &prim, PixelType *dstdata, u32 pitch, quad_setup_data const &setup)
{
if (prim.color.r >= 1.0f && prim.color.g >= 1.0f && prim.color.b >= 1.0f && is_opaque(prim.color.a))
{
// fast case: no coloring, no alpha
// loop over rows
for (s32 y = setup.starty; y < setup.endy; y++)
{
PixelType *dest = dstdata + y * pitch + setup.startx;
s32 curu = setup.startu + (y - setup.starty) * setup.dudy;
s32 curv = setup.startv + (y - setup.starty) * setup.dvdy;
// loop over cols
for (s32 x = setup.startx; x < setup.endx; x++)
{
u32 const pix = ycc_to_rgb(get_texel_yuy16(prim.texture, curu, curv));
*dest++ = source32_to_dest(pix);
curu += setup.dudx;
curv += setup.dvdx;
}
}
}
else if (is_opaque(prim.color.a))
{
// coloring-only case
// clamp R,G,B to 0-256 range
u32 const sr = u32(std::clamp(256.0f * prim.color.r, 0.0f, 256.0f));
u32 const sg = u32(std::clamp(256.0f * prim.color.g, 0.0f, 256.0f));
u32 const sb = u32(std::clamp(256.0f * prim.color.b, 0.0f, 256.0f));
// loop over rows
for (s32 y = setup.starty; y < setup.endy; y++)
{
PixelType *dest = dstdata + y * pitch + setup.startx;
s32 curu = setup.startu + (y - setup.starty) * setup.dudy;
s32 curv = setup.startv + (y - setup.starty) * setup.dvdy;
// loop over cols
for (s32 x = setup.startx; x < setup.endx; x++)
{
u32 const pix = ycc_to_rgb(get_texel_yuy16(prim.texture, curu, curv));
u32 const r = (source32_r(pix) * sr) >> 8;
u32 const g = (source32_g(pix) * sg) >> 8;
u32 const b = (source32_b(pix) * sb) >> 8;
*dest++ = dest_assemble_rgb(r, g, b);
curu += setup.dudx;
curv += setup.dvdx;
}
}
}
else if (!is_transparent(prim.color.a))
{
// alpha and/or coloring case
// clamp R,G,B and inverse A to 0-256 range
u32 const sr = u32(std::clamp(256.0f * prim.color.r * prim.color.a, 0.0f, 256.0f));
u32 const sg = u32(std::clamp(256.0f * prim.color.g * prim.color.a, 0.0f, 256.0f));
u32 const sb = u32(std::clamp(256.0f * prim.color.b * prim.color.a, 0.0f, 256.0f));
u32 const invsa = u32(std::clamp(256.0f * (1.0f - prim.color.a), 0.0f, 256.0f));
// loop over rows
for (s32 y = setup.starty; y < setup.endy; y++)
{
PixelType *dest = dstdata + y * pitch + setup.startx;
s32 curu = setup.startu + (y - setup.starty) * setup.dudy;
s32 curv = setup.startv + (y - setup.starty) * setup.dvdy;
// loop over cols
for (s32 x = setup.startx; x < setup.endx; x++)
{
u32 const pix = ycc_to_rgb(get_texel_yuy16(prim.texture, curu, curv));
u32 const dpix = NoDestRead ? 0 : *dest;
u32 const r = (source32_r(pix) * sr + dest_r(dpix) * invsa) >> 8;
u32 const g = (source32_g(pix) * sg + dest_g(dpix) * invsa) >> 8;
u32 const b = (source32_b(pix) * sb + dest_b(dpix) * invsa) >> 8;
*dest++ = dest_assemble_rgb(r, g, b);
curu += setup.dudx;
curv += setup.dvdx;
}
}
}
}
//**************************************************************************
// 32-BIT RGB QUAD RASTERIZERS
//**************************************************************************