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/*
** Drawer commands for sprites
** 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.
**
*/
#pragma once
#include "swrenderer/drawers/r_draw_rgba.h"
#include "swrenderer/viewport/r_walldrawer.h"
namespace swrenderer
{
namespace DrawSprite32TModes
{
enum class SpriteBlendModes { Copy, Opaque, Shaded, AddClampShaded, AddClamp, SubClamp, RevSubClamp };
struct CopySprite { static const int Mode = (int)SpriteBlendModes::Copy; };
struct OpaqueSprite { static const int Mode = (int)SpriteBlendModes::Opaque; };
struct ShadedSprite { static const int Mode = (int)SpriteBlendModes::Shaded; };
struct AddClampShadedSprite { static const int Mode = (int)SpriteBlendModes::AddClampShaded; };
struct AddClampSprite { static const int Mode = (int)SpriteBlendModes::AddClamp; };
struct SubClampSprite { static const int Mode = (int)SpriteBlendModes::SubClamp; };
struct RevSubClampSprite { static const int Mode = (int)SpriteBlendModes::RevSubClamp; };
enum class FilterModes { Nearest, Linear };
struct NearestFilter { static const int Mode = (int)FilterModes::Nearest; };
struct LinearFilter { static const int Mode = (int)FilterModes::Linear; };
enum class ShadeMode { Simple, Advanced };
struct SimpleShade { static const int Mode = (int)ShadeMode::Simple; };
struct AdvancedShade { static const int Mode = (int)ShadeMode::Advanced; };
enum class SpriteSamplers { Texture, Fill, Shaded, Translated };
struct TextureSampler { static const int Mode = (int)SpriteSamplers::Texture; };
struct FillSampler { static const int Mode = (int)SpriteSamplers::Fill; };
struct ShadedSampler { static const int Mode = (int)SpriteSamplers::Shaded; };
struct TranslatedSampler { static const int Mode = (int)SpriteSamplers::Translated; };
}
template<typename BlendT, typename SamplerT>
class DrawSprite32T
{
public:
static void DrawColumn(const SpriteDrawerArgs& args)
{
using namespace DrawSprite32TModes;
auto shade_constants = args.ColormapConstants();
if (SamplerT::Mode == (int)SpriteSamplers::Texture)
{
const uint32_t *source2 = (const uint32_t*)args.TexturePixels2();
bool is_nearest_filter = (source2 == nullptr);
if (shade_constants.simple_shade)
{
if (is_nearest_filter)
Loop<SimpleShade, NearestFilter>(args, shade_constants);
else
Loop<SimpleShade, LinearFilter>(args, shade_constants);
}
else
{
if (is_nearest_filter)
Loop<AdvancedShade, NearestFilter>(args, shade_constants);
else
Loop<AdvancedShade, LinearFilter>(args, shade_constants);
}
}
else // no linear filtering for translated, shaded or fill
{
if (shade_constants.simple_shade)
{
Loop<SimpleShade, NearestFilter>(args, shade_constants);
}
else
{
Loop<AdvancedShade, NearestFilter>(args, shade_constants);
}
}
}
template<typename ShadeModeT, typename FilterModeT>
FORCEINLINE static void Loop(const SpriteDrawerArgs& args, ShadeConstants shade_constants)
{
using namespace DrawSprite32TModes;
const uint32_t *source;
const uint32_t *source2;
const uint8_t *colormap;
const uint32_t *translation;
if (SamplerT::Mode == (int)SpriteSamplers::Shaded || SamplerT::Mode == (int)SpriteSamplers::Translated)
{
source = (const uint32_t*)args.TexturePixels();
source2 = nullptr;
colormap = args.Colormap(args.Viewport());
translation = (const uint32_t*)args.TranslationMap();
}
else
{
source = (const uint32_t*)args.TexturePixels();
source2 = (const uint32_t*)args.TexturePixels2();
colormap = nullptr;
translation = nullptr;
}
int textureheight = args.TextureHeight();
uint32_t one = ((0x20000000 + textureheight - 1) / textureheight) * 2 + 1;
// Shade constants
BgraColor dynlight = args.DynamicLight();
uint32_t light = 256 - (args.Light() >> (FRACBITS - 8));
BgraColor mlight;
int inv_desaturate;
BgraColor shade_fade, shade_light;
int desaturate;
BgraColor lightcontrib;
if (ShadeModeT::Mode == (int)ShadeMode::Advanced)
{
uint32_t inv_light = 256 - light;
inv_desaturate = 256 - shade_constants.desaturate;
shade_fade.r = shade_constants.fade_red * inv_light;
shade_fade.g = shade_constants.fade_green * inv_light;
shade_fade.b = shade_constants.fade_blue * inv_light;
shade_light.r = shade_constants.light_red;
shade_light.g = shade_constants.light_green;
shade_light.b = shade_constants.light_blue;
desaturate = shade_constants.desaturate;
lightcontrib.r = min<uint32_t>(light + dynlight.r, 256) - light;
lightcontrib.g = min<uint32_t>(light + dynlight.g, 256) - light;
lightcontrib.b = min<uint32_t>(light + dynlight.b, 256) - light;
mlight.r = light;
mlight.g = light;
mlight.b = light;
}
else
{
inv_desaturate = 0;
shade_fade.r = 0;
shade_fade.g = 0;
shade_fade.b = 0;
shade_light.r = 0;
shade_light.g = 0;
shade_light.b = 0;
desaturate = 0;
lightcontrib = 0;
mlight.r = min<uint32_t>(light + dynlight.r, 256);
mlight.g = min<uint32_t>(light + dynlight.g, 256);
mlight.b = min<uint32_t>(light + dynlight.b, 256);
}
int count = args.Count();
if (count <= 0) return;
int pitch = args.Viewport()->RenderTarget->GetPitch();
uint32_t fracstep = args.TextureVStep();
uint32_t frac = args.TextureVPos();
uint32_t texturefracx = args.TextureUPos();
uint32_t *dest = (uint32_t*)args.Dest();
int dest_y = args.DestY();
if (FilterModeT::Mode == (int)FilterModes::Linear)
{
frac -= one / 2;
}
uint32_t srcalpha = args.SrcAlpha() >> (FRACBITS - 8);
uint32_t destalpha = args.DestAlpha() >> (FRACBITS - 8);
uint32_t srccolor = args.SrcColorBgra();
uint32_t color = LightBgra::shade_bgra_simple(args.SolidColorBgra(),
LightBgra::calc_light_multiplier(light));
for (int index = 0; index < count; index++)
{
BgraColor bgcolor;
if (BlendT::Mode != (int)SpriteBlendModes::Opaque && BlendT::Mode != (int)SpriteBlendModes::Copy)
{
bgcolor = *dest;
}
else
{
bgcolor = 0;
}
uint32_t ifgcolor = Sample<FilterModeT>(frac, source, source2, translation, textureheight, one, texturefracx, color, srccolor);
uint32_t ifgshade = SampleShade(frac, source, colormap);
BgraColor fgcolor = Shade<ShadeModeT>(ifgcolor, mlight, desaturate, inv_desaturate, shade_fade, shade_light, lightcontrib);
BgraColor outcolor = Blend(fgcolor, bgcolor, ifgcolor, ifgshade, srcalpha, destalpha);
*dest = outcolor;
dest += pitch;
frac += fracstep;
}
}
template<typename FilterModeT>
FORCEINLINE static BgraColor Sample(uint32_t frac, const uint32_t *source, const uint32_t *source2, const uint32_t *translation, int textureheight, uint32_t one, uint32_t texturefracx, uint32_t color, uint32_t srccolor)
{
using namespace DrawSprite32TModes;
if (SamplerT::Mode == (int)SpriteSamplers::Shaded)
{
return color;
}
else if (SamplerT::Mode == (int)SpriteSamplers::Translated)
{
const uint8_t *sourcepal = (const uint8_t *)source;
return translation[sourcepal[frac >> FRACBITS]];
}
else if (SamplerT::Mode == (int)SpriteSamplers::Fill)
{
return srccolor;
}
else if (FilterModeT::Mode == (int)FilterModes::Nearest)
{
int sample_index = (((frac << 2) >> FRACBITS) * textureheight) >> FRACBITS;
return source[sample_index];
}
else
{
// Clamp to edge
unsigned int frac_y0 = (clamp<unsigned int>(frac, 0, 1 << 30) >> (FRACBITS - 2)) * textureheight;
unsigned int frac_y1 = (clamp<unsigned int>(frac + one, 0, 1 << 30) >> (FRACBITS - 2)) * textureheight;
unsigned int y0 = frac_y0 >> FRACBITS;
unsigned int y1 = frac_y1 >> FRACBITS;
unsigned int p00 = source[y0];
unsigned int p01 = source[y1];
unsigned int p10 = source2[y0];
unsigned int p11 = source2[y1];
unsigned int inv_b = texturefracx;
unsigned int inv_a = (frac_y1 >> (FRACBITS - 4)) & 15;
unsigned int a = 16 - inv_a;
unsigned int b = 16 - inv_b;
BgraColor result;
result.r = (RPART(p00) * (a * b) + RPART(p01) * (inv_a * b) + RPART(p10) * (a * inv_b) + RPART(p11) * (inv_a * inv_b) + 127) >> 8;
result.g = (GPART(p00) * (a * b) + GPART(p01) * (inv_a * b) + GPART(p10) * (a * inv_b) + GPART(p11) * (inv_a * inv_b) + 127) >> 8;
result.b = (BPART(p00) * (a * b) + BPART(p01) * (inv_a * b) + BPART(p10) * (a * inv_b) + BPART(p11) * (inv_a * inv_b) + 127) >> 8;
result.a = (APART(p00) * (a * b) + APART(p01) * (inv_a * b) + APART(p10) * (a * inv_b) + APART(p11) * (inv_a * inv_b) + 127) >> 8;
return result;
}
}
FORCEINLINE static uint32_t SampleShade(uint32_t frac, const uint32_t *source, const uint8_t *colormap)
{
using namespace DrawSprite32TModes;
if (SamplerT::Mode == (int)SpriteSamplers::Shaded)
{
const uint8_t *sourcepal = (const uint8_t *)source;
unsigned int sampleshadeout = colormap[sourcepal[frac >> FRACBITS]];
return clamp<unsigned int>(sampleshadeout, 0, 64) * 4;
}
else
{
return 0;
}
}
template<typename ShadeModeT>
FORCEINLINE static BgraColor Shade(BgraColor fgcolor, BgraColor mlight, uint32_t desaturate, uint32_t inv_desaturate, BgraColor shade_fade, BgraColor shade_light, BgraColor lightcontrib)
{
using namespace DrawSprite32TModes;
if (BlendT::Mode == (int)SpriteBlendModes::Copy)
return fgcolor;
if (ShadeModeT::Mode == (int)ShadeMode::Simple)
{
fgcolor.r = (fgcolor.r * mlight.r) >> 8;
fgcolor.g = (fgcolor.g * mlight.g) >> 8;
fgcolor.b = (fgcolor.b * mlight.b) >> 8;
return fgcolor;
}
else
{
BgraColor lit_dynlight = ((fgcolor.r * lightcontrib.r) >> 8);
uint32_t intensity = ((fgcolor.r * 77 + fgcolor.g * 143 + fgcolor.b * 37) >> 8) * desaturate;
fgcolor.r = (((shade_fade.r + ((fgcolor.r * inv_desaturate + intensity) >> 8) * mlight.r) >> 8) * shade_light.r) >> 8;
fgcolor.g = (((shade_fade.g + ((fgcolor.g * inv_desaturate + intensity) >> 8) * mlight.g) >> 8) * shade_light.g) >> 8;
fgcolor.b = (((shade_fade.b + ((fgcolor.b * inv_desaturate + intensity) >> 8) * mlight.b) >> 8) * shade_light.b) >> 8;
fgcolor.r = min<uint32_t>(fgcolor.r + lit_dynlight.r, 255);
fgcolor.g = min<uint32_t>(fgcolor.g + lit_dynlight.g, 255);
fgcolor.b = min<uint32_t>(fgcolor.b + lit_dynlight.b, 255);
return fgcolor;
}
}
FORCEINLINE static BgraColor Blend(BgraColor fgcolor, BgraColor bgcolor, uint32_t ifgcolor, uint32_t ifgshade, uint32_t srcalpha, uint32_t destalpha)
{
using namespace DrawSprite32TModes;
if (BlendT::Mode == (int)SpriteBlendModes::Opaque)
{
fgcolor.a = 255;
return fgcolor;
}
else if (BlendT::Mode == (int)SpriteBlendModes::Shaded)
{
uint32_t alpha = ifgshade;
uint32_t inv_alpha = 256 - alpha;
BgraColor outcolor;
outcolor.r = (fgcolor.r * alpha + bgcolor.r * inv_alpha) >> 8;
outcolor.g = (fgcolor.g * alpha + bgcolor.g * inv_alpha) >> 8;
outcolor.b = (fgcolor.b * alpha + bgcolor.b * inv_alpha) >> 8;
outcolor.a = 255;
return outcolor;
}
else if (BlendT::Mode == (int)SpriteBlendModes::AddClampShaded)
{
uint32_t alpha = ifgshade;
BgraColor outcolor;
outcolor.r = min<uint32_t>(((fgcolor.r * alpha) >> 8) + bgcolor.r, 255);
outcolor.g = min<uint32_t>(((fgcolor.g * alpha) >> 8) + bgcolor.g, 255);
outcolor.b = min<uint32_t>(((fgcolor.b * alpha) >> 8) + bgcolor.b, 255);
outcolor.a = 255;
return outcolor;
}
else
{
uint32_t alpha = APART(ifgcolor);
alpha += alpha >> 7; // 255->256
uint32_t inv_alpha = 256 - alpha;
uint32_t bgalpha = (destalpha * alpha + (inv_alpha << 8) + 128) >> 8;
uint32_t fgalpha = (srcalpha * alpha + 128) >> 8;
fgcolor.r *= fgalpha;
fgcolor.g *= fgalpha;
fgcolor.b *= fgalpha;
bgcolor.r *= bgalpha;
bgcolor.g *= bgalpha;
bgcolor.b *= bgalpha;
BgraColor outcolor;
if (BlendT::Mode == (int)SpriteBlendModes::AddClamp)
{
outcolor.r = min<uint32_t>((fgcolor.r + bgcolor.r) >> 8, 255);
outcolor.g = min<uint32_t>((fgcolor.g + bgcolor.g) >> 8, 255);
outcolor.b = min<uint32_t>((fgcolor.b + bgcolor.b) >> 8, 255);
}
else if (BlendT::Mode == (int)SpriteBlendModes::SubClamp)
{
outcolor.r = max(int32_t(fgcolor.r - bgcolor.r) >> 8, 0);
outcolor.g = max(int32_t(fgcolor.g - bgcolor.g) >> 8, 0);
outcolor.b = max(int32_t(fgcolor.b - bgcolor.b) >> 8, 0);
}
else if (BlendT::Mode == (int)SpriteBlendModes::RevSubClamp)
{
outcolor.r = max(int32_t(bgcolor.r - fgcolor.r) >> 8, 0);
outcolor.g = max(int32_t(bgcolor.g - fgcolor.g) >> 8, 0);
outcolor.b = max(int32_t(bgcolor.b - fgcolor.b) >> 8, 0);
}
outcolor.a = 255;
return outcolor;
}
}
};
typedef DrawSprite32T<DrawSprite32TModes::CopySprite, DrawSprite32TModes::TextureSampler> DrawSpriteCopy32Command;
typedef DrawSprite32T<DrawSprite32TModes::OpaqueSprite, DrawSprite32TModes::TextureSampler> DrawSprite32Command;
typedef DrawSprite32T<DrawSprite32TModes::AddClampSprite, DrawSprite32TModes::TextureSampler> DrawSpriteAddClamp32Command;
typedef DrawSprite32T<DrawSprite32TModes::SubClampSprite, DrawSprite32TModes::TextureSampler> DrawSpriteSubClamp32Command;
typedef DrawSprite32T<DrawSprite32TModes::RevSubClampSprite, DrawSprite32TModes::TextureSampler> DrawSpriteRevSubClamp32Command;
typedef DrawSprite32T<DrawSprite32TModes::OpaqueSprite, DrawSprite32TModes::FillSampler> FillSprite32Command;
typedef DrawSprite32T<DrawSprite32TModes::AddClampSprite, DrawSprite32TModes::FillSampler> FillSpriteAddClamp32Command;
typedef DrawSprite32T<DrawSprite32TModes::SubClampSprite, DrawSprite32TModes::FillSampler> FillSpriteSubClamp32Command;
typedef DrawSprite32T<DrawSprite32TModes::RevSubClampSprite, DrawSprite32TModes::FillSampler> FillSpriteRevSubClamp32Command;
typedef DrawSprite32T<DrawSprite32TModes::ShadedSprite, DrawSprite32TModes::ShadedSampler> DrawSpriteShaded32Command;
typedef DrawSprite32T<DrawSprite32TModes::AddClampShadedSprite, DrawSprite32TModes::ShadedSampler> DrawSpriteAddClampShaded32Command;
typedef DrawSprite32T<DrawSprite32TModes::OpaqueSprite, DrawSprite32TModes::TranslatedSampler> DrawSpriteTranslated32Command;
typedef DrawSprite32T<DrawSprite32TModes::AddClampSprite, DrawSprite32TModes::TranslatedSampler> DrawSpriteTranslatedAddClamp32Command;
typedef DrawSprite32T<DrawSprite32TModes::SubClampSprite, DrawSprite32TModes::TranslatedSampler> DrawSpriteTranslatedSubClamp32Command;
typedef DrawSprite32T<DrawSprite32TModes::RevSubClampSprite, DrawSprite32TModes::TranslatedSampler> DrawSpriteTranslatedRevSubClamp32Command;
}