mirror of https://github.com/ZDoom/qzdoom.git
248 lines
8.0 KiB
C++
248 lines
8.0 KiB
C++
/*
|
|
** DrawSpan code generation
|
|
** Copyright (c) 2016 Magnus Norddahl
|
|
**
|
|
** This software is provided 'as-is', without any express or implied
|
|
** warranty. In no event will the authors be held liable for any damages
|
|
** arising from the use of this software.
|
|
**
|
|
** Permission is granted to anyone to use this software for any purpose,
|
|
** including commercial applications, and to alter it and redistribute it
|
|
** freely, subject to the following restrictions:
|
|
**
|
|
** 1. The origin of this software must not be misrepresented; you must not
|
|
** claim that you wrote the original software. If you use this software
|
|
** in a product, an acknowledgment in the product documentation would be
|
|
** appreciated but is not required.
|
|
** 2. Altered source versions must be plainly marked as such, and must not be
|
|
** misrepresented as being the original software.
|
|
** 3. This notice may not be removed or altered from any source distribution.
|
|
**
|
|
*/
|
|
|
|
#include "precomp.h"
|
|
#include "timestamp.h"
|
|
#include "fixedfunction/drawspancodegen.h"
|
|
#include "ssa/ssa_function.h"
|
|
#include "ssa/ssa_scope.h"
|
|
#include "ssa/ssa_for_block.h"
|
|
#include "ssa/ssa_if_block.h"
|
|
#include "ssa/ssa_stack.h"
|
|
#include "ssa/ssa_function.h"
|
|
#include "ssa/ssa_struct_type.h"
|
|
#include "ssa/ssa_value.h"
|
|
|
|
void DrawSpanCodegen::Generate(DrawSpanVariant variant, SSAValue args)
|
|
{
|
|
destorg = args[0][0].load(true);
|
|
source = args[0][1].load(true);
|
|
destpitch = args[0][2].load(true);
|
|
stack_xfrac.store(args[0][3].load(true));
|
|
stack_yfrac.store(args[0][4].load(true));
|
|
xstep = args[0][5].load(true);
|
|
ystep = args[0][6].load(true);
|
|
x1 = args[0][7].load(true);
|
|
x2 = args[0][8].load(true);
|
|
y = args[0][9].load(true);
|
|
xbits = args[0][10].load(true);
|
|
ybits = args[0][11].load(true);
|
|
light = args[0][12].load(true);
|
|
srcalpha = args[0][13].load(true);
|
|
destalpha = args[0][14].load(true);
|
|
SSAShort light_alpha = args[0][15].load(true);
|
|
SSAShort light_red = args[0][16].load(true);
|
|
SSAShort light_green = args[0][17].load(true);
|
|
SSAShort light_blue = args[0][18].load(true);
|
|
SSAShort fade_alpha = args[0][19].load(true);
|
|
SSAShort fade_red = args[0][20].load(true);
|
|
SSAShort fade_green = args[0][21].load(true);
|
|
SSAShort fade_blue = args[0][22].load(true);
|
|
SSAShort desaturate = args[0][23].load(true);
|
|
SSAInt flags = args[0][24].load(true);
|
|
shade_constants.light = SSAVec4i(light_blue.zext_int(), light_green.zext_int(), light_red.zext_int(), light_alpha.zext_int());
|
|
shade_constants.fade = SSAVec4i(fade_blue.zext_int(), fade_green.zext_int(), fade_red.zext_int(), fade_alpha.zext_int());
|
|
shade_constants.desaturate = desaturate.zext_int();
|
|
|
|
count = x2 - x1 + 1;
|
|
data = destorg[(x1 + y * destpitch) * 4];
|
|
|
|
yshift = 32 - ybits;
|
|
xshift = yshift - xbits;
|
|
xmask = ((SSAInt(1) << xbits) - 1) << ybits;
|
|
|
|
// 64x64 is the most common case by far, so special case it.
|
|
is_64x64 = xbits == SSAInt(6) && ybits == SSAInt(6);
|
|
is_simple_shade = (flags & DrawSpanArgs::simple_shade) == SSAInt(DrawSpanArgs::simple_shade);
|
|
is_nearest_filter = (flags & DrawSpanArgs::nearest_filter) == SSAInt(DrawSpanArgs::nearest_filter);
|
|
|
|
SSAIfBlock branch;
|
|
branch.if_block(is_simple_shade);
|
|
LoopShade(variant, true);
|
|
branch.else_block();
|
|
LoopShade(variant, false);
|
|
branch.end_block();
|
|
}
|
|
|
|
void DrawSpanCodegen::LoopShade(DrawSpanVariant variant, bool isSimpleShade)
|
|
{
|
|
SSAIfBlock branch;
|
|
branch.if_block(is_nearest_filter);
|
|
LoopFilter(variant, isSimpleShade, true);
|
|
branch.else_block();
|
|
stack_xfrac.store(stack_xfrac.load() - (SSAInt(1) << (31 - xbits)));
|
|
stack_yfrac.store(stack_yfrac.load() - (SSAInt(1) << (31 - ybits)));
|
|
LoopFilter(variant, isSimpleShade, false);
|
|
branch.end_block();
|
|
}
|
|
|
|
void DrawSpanCodegen::LoopFilter(DrawSpanVariant variant, bool isSimpleShade, bool isNearestFilter)
|
|
{
|
|
SSAIfBlock branch;
|
|
branch.if_block(is_64x64);
|
|
{
|
|
SSAInt sseLength = Loop4x(variant, isSimpleShade, isNearestFilter, true);
|
|
Loop(sseLength * 4, variant, isSimpleShade, isNearestFilter, true);
|
|
}
|
|
branch.else_block();
|
|
{
|
|
SSAInt sseLength = Loop4x(variant, isSimpleShade, isNearestFilter, false);
|
|
Loop(sseLength * 4, variant, isSimpleShade, isNearestFilter, false);
|
|
}
|
|
branch.end_block();
|
|
}
|
|
|
|
SSAInt DrawSpanCodegen::Loop4x(DrawSpanVariant variant, bool isSimpleShade, bool isNearestFilter, bool is64x64)
|
|
{
|
|
SSAInt sseLength = count / 4;
|
|
stack_index.store(SSAInt(0));
|
|
{
|
|
SSAForBlock loop;
|
|
SSAInt index = stack_index.load();
|
|
loop.loop_block(index < sseLength);
|
|
|
|
SSAVec16ub bg = data[index * 16].load_unaligned_vec16ub(false);
|
|
SSAVec8s bg0 = SSAVec8s::extendlo(bg);
|
|
SSAVec8s bg1 = SSAVec8s::extendhi(bg);
|
|
SSAVec4i bgcolors[4] =
|
|
{
|
|
SSAVec4i::extendlo(bg0),
|
|
SSAVec4i::extendhi(bg0),
|
|
SSAVec4i::extendlo(bg1),
|
|
SSAVec4i::extendhi(bg1)
|
|
};
|
|
|
|
SSAVec4i colors[4];
|
|
for (int i = 0; i < 4; i++)
|
|
{
|
|
SSAInt xfrac = stack_xfrac.load();
|
|
SSAInt yfrac = stack_yfrac.load();
|
|
|
|
colors[i] = Blend(Shade(Sample(xfrac, yfrac, isNearestFilter, is64x64), isSimpleShade), bgcolors[i], variant);
|
|
|
|
stack_xfrac.store(xfrac + xstep);
|
|
stack_yfrac.store(yfrac + ystep);
|
|
}
|
|
|
|
SSAVec16ub color(SSAVec8s(colors[0], colors[1]), SSAVec8s(colors[2], colors[3]));
|
|
data[index * 16].store_unaligned_vec16ub(color);
|
|
|
|
stack_index.store(index.add(SSAInt(1), true, true));
|
|
loop.end_block();
|
|
}
|
|
return sseLength;
|
|
}
|
|
|
|
void DrawSpanCodegen::Loop(SSAInt start, DrawSpanVariant variant, bool isSimpleShade, bool isNearestFilter, bool is64x64)
|
|
{
|
|
stack_index.store(start);
|
|
{
|
|
SSAForBlock loop;
|
|
SSAInt index = stack_index.load();
|
|
loop.loop_block(index < count);
|
|
|
|
SSAInt xfrac = stack_xfrac.load();
|
|
SSAInt yfrac = stack_yfrac.load();
|
|
|
|
SSAVec4i bgcolor = data[index * 4].load_vec4ub(false);
|
|
SSAVec4i color = Blend(Shade(Sample(xfrac, yfrac, isNearestFilter, is64x64), isSimpleShade), bgcolor, variant);
|
|
data[index * 4].store_vec4ub(color);
|
|
|
|
stack_index.store(index.add(SSAInt(1), true, true));
|
|
stack_xfrac.store(xfrac + xstep);
|
|
stack_yfrac.store(yfrac + ystep);
|
|
loop.end_block();
|
|
}
|
|
}
|
|
|
|
SSAVec4i DrawSpanCodegen::Sample(SSAInt xfrac, SSAInt yfrac, bool isNearestFilter, bool is64x64)
|
|
{
|
|
if (isNearestFilter)
|
|
{
|
|
SSAInt spot;
|
|
if (is64x64)
|
|
spot = ((xfrac >> (32 - 6 - 6))&(63 * 64)) + (yfrac >> (32 - 6));
|
|
else
|
|
spot = ((xfrac >> xshift) & xmask) + (yfrac >> yshift);
|
|
return source[spot * 4].load_vec4ub(true);
|
|
}
|
|
else
|
|
{
|
|
if (is64x64)
|
|
{
|
|
return SampleLinear(source, xfrac, yfrac, SSAInt(26), SSAInt(26));
|
|
}
|
|
else
|
|
{
|
|
return SampleLinear(source, xfrac, yfrac, 32 - xbits, 32 - ybits);
|
|
}
|
|
}
|
|
}
|
|
|
|
SSAVec4i DrawSpanCodegen::SampleLinear(SSAUBytePtr texture, SSAInt xfrac, SSAInt yfrac, SSAInt xbits, SSAInt ybits)
|
|
{
|
|
SSAInt xshift = (32 - xbits);
|
|
SSAInt yshift = (32 - ybits);
|
|
SSAInt xmask = (SSAInt(1) << xshift) - 1;
|
|
SSAInt ymask = (SSAInt(1) << yshift) - 1;
|
|
SSAInt x = xfrac >> xbits;
|
|
SSAInt y = yfrac >> ybits;
|
|
|
|
SSAVec4i p00 = texture[((y & ymask) + ((x & xmask) << yshift)) * 4].load_vec4ub(true);
|
|
SSAVec4i p01 = texture[(((y + 1) & ymask) + ((x & xmask) << yshift)) * 4].load_vec4ub(true);
|
|
SSAVec4i p10 = texture[((y & ymask) + (((x + 1) & xmask) << yshift)) * 4].load_vec4ub(true);
|
|
SSAVec4i p11 = texture[(((y + 1) & ymask) + (((x + 1) & xmask) << yshift)) * 4].load_vec4ub(true);
|
|
|
|
SSAInt inv_b = (xfrac >> (xbits - 4)) & 15;
|
|
SSAInt inv_a = (yfrac >> (ybits - 4)) & 15;
|
|
SSAInt a = 16 - inv_a;
|
|
SSAInt b = 16 - inv_b;
|
|
|
|
return (p00 * (a * b) + p01 * (inv_a * b) + p10 * (a * inv_b) + p11 * (inv_a * inv_b) + 127) >> 8;
|
|
}
|
|
|
|
SSAVec4i DrawSpanCodegen::Shade(SSAVec4i fg, bool isSimpleShade)
|
|
{
|
|
if (isSimpleShade)
|
|
return shade_bgra_simple(fg, light);
|
|
else
|
|
return shade_bgra_advanced(fg, light, shade_constants);
|
|
}
|
|
|
|
SSAVec4i DrawSpanCodegen::Blend(SSAVec4i fg, SSAVec4i bg, DrawSpanVariant variant)
|
|
{
|
|
switch (variant)
|
|
{
|
|
default:
|
|
case DrawSpanVariant::Opaque:
|
|
return blend_copy(fg);
|
|
case DrawSpanVariant::Masked:
|
|
return blend_alpha_blend(fg, bg);
|
|
case DrawSpanVariant::Translucent:
|
|
case DrawSpanVariant::AddClamp:
|
|
return blend_add(fg, bg, srcalpha, destalpha);
|
|
case DrawSpanVariant::MaskedTranslucent:
|
|
case DrawSpanVariant::MaskedAddClamp:
|
|
return blend_add(fg, bg, srcalpha, calc_blend_bgalpha(fg, destalpha));
|
|
}
|
|
}
|