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Rasterizer.cpp
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Rasterizer.cpp
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// Copyright (c) 2013- PPSSPP Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
#include <algorithm>
#include <cmath>
#include "base/basictypes.h"
#include "profiler/profiler.h"
#include "Common/ThreadPools.h"
#include "Common/ColorConv.h"
#include "Core/Config.h"
#include "Core/MemMap.h"
#include "Core/Reporting.h"
#include "GPU/GPUState.h"
#include "GPU/Common/TextureCacheCommon.h"
#include "GPU/Common/TextureDecoder.h"
#include "GPU/Software/SoftGpu.h"
#include "GPU/Software/Rasterizer.h"
#include "GPU/Software/Sampler.h"
#if defined(_M_SSE)
#include <emmintrin.h>
#endif
namespace Rasterizer {
// Only OK on x64 where our stack is aligned
#if defined(_M_SSE) && !defined(_M_IX86)
static inline __m128 Interpolate(const __m128 &c0, const __m128 &c1, const __m128 &c2, int w0, int w1, int w2, float wsum) {
__m128 v = _mm_mul_ps(c0, _mm_cvtepi32_ps(_mm_set1_epi32(w0)));
v = _mm_add_ps(v, _mm_mul_ps(c1, _mm_cvtepi32_ps(_mm_set1_epi32(w1))));
v = _mm_add_ps(v, _mm_mul_ps(c2, _mm_cvtepi32_ps(_mm_set1_epi32(w2))));
return _mm_mul_ps(v, _mm_set_ps1(wsum));
}
static inline __m128i Interpolate(const __m128i &c0, const __m128i &c1, const __m128i &c2, int w0, int w1, int w2, float wsum) {
return _mm_cvtps_epi32(Interpolate(_mm_cvtepi32_ps(c0), _mm_cvtepi32_ps(c1), _mm_cvtepi32_ps(c2), w0, w1, w2, wsum));
}
#endif
// NOTE: When not casting color0 and color1 to float vectors, this code suffers from severe overflow issues.
// Not sure if that should be regarded as a bug or if casting to float is a valid fix.
static inline Vec4<int> Interpolate(const Vec4<int> &c0, const Vec4<int> &c1, const Vec4<int> &c2, int w0, int w1, int w2, float wsum) {
#if defined(_M_SSE) && !defined(_M_IX86)
return Vec4<int>(Interpolate(c0.ivec, c1.ivec, c2.ivec, w0, w1, w2, wsum));
#else
return ((c0.Cast<float>() * w0 + c1.Cast<float>() * w1 + c2.Cast<float>() * w2) * wsum).Cast<int>();
#endif
}
static inline Vec3<int> Interpolate(const Vec3<int> &c0, const Vec3<int> &c1, const Vec3<int> &c2, int w0, int w1, int w2, float wsum) {
#if defined(_M_SSE) && !defined(_M_IX86)
return Vec3<int>(Interpolate(c0.ivec, c1.ivec, c2.ivec, w0, w1, w2, wsum));
#else
return ((c0.Cast<float>() * w0 + c1.Cast<float>() * w1 + c2.Cast<float>() * w2) * wsum).Cast<int>();
#endif
}
static inline Vec2<float> Interpolate(const Vec2<float> &c0, const Vec2<float> &c1, const Vec2<float> &c2, int w0, int w1, int w2, float wsum) {
#if defined(_M_SSE) && !defined(_M_IX86)
return Vec2<float>(Interpolate(c0.vec, c1.vec, c2.vec, w0, w1, w2, wsum));
#else
return (c0 * w0 + c1 * w1 + c2 * w2) * wsum;
#endif
}
static inline Vec4<float> Interpolate(const float &c0, const float &c1, const float &c2, const Vec4<float> &w0, const Vec4<float> &w1, const Vec4<float> &w2, const Vec4<float> &wsum_recip) {
#if defined(_M_SSE) && !defined(_M_IX86)
__m128 v = _mm_mul_ps(w0.vec, _mm_set1_ps(c0));
v = _mm_add_ps(v, _mm_mul_ps(w1.vec, _mm_set1_ps(c1)));
v = _mm_add_ps(v, _mm_mul_ps(w2.vec, _mm_set1_ps(c2)));
return _mm_mul_ps(v, wsum_recip.vec);
#else
return (w0 * c0 + w1 * c1 + w2 * c2) * wsum_recip;
#endif
}
static inline Vec4<float> Interpolate(const float &c0, const float &c1, const float &c2, const Vec4<int> &w0, const Vec4<int> &w1, const Vec4<int> &w2, const Vec4<float> &wsum_recip) {
return Interpolate(c0, c1, c2, w0.Cast<float>(), w1.Cast<float>(), w2.Cast<float>(), wsum_recip);
}
static inline u8 ClampFogDepth(float fogdepth) {
if (fogdepth <= 0.0f)
return 0;
else if (fogdepth >= 1.0f)
return 255;
else
return (u8)(u32)(fogdepth * 255.0f);
}
static inline int ClampUV(int v, int height) {
if (v >= height - 1)
return height - 1;
else if (v < 0)
return 0;
return v;
}
static inline int WrapUV(int v, int height) {
return v & (height - 1);
}
template <int N>
static inline void ApplyTexelClamp(int out_u[N], int out_v[N], const int u[N], const int v[N], int width, int height) {
if (gstate.isTexCoordClampedS()) {
for (int i = 0; i < N; ++i) {
out_u[i] = ClampUV(u[i], width);
}
} else {
for (int i = 0; i < N; ++i) {
out_u[i] = WrapUV(u[i], width);
}
}
if (gstate.isTexCoordClampedT()) {
for (int i = 0; i < N; ++i) {
out_v[i] = ClampUV(v[i], height);
}
} else {
for (int i = 0; i < N; ++i) {
out_v[i] = WrapUV(v[i], height);
}
}
}
template <int N>
static inline void ApplyTexelClampQuad(int out_u[N * 4], int out_v[N * 4], const int u[N], const int v[N], int width, int height) {
if (gstate.isTexCoordClampedS()) {
for (int i = 0; i < N * 4; ++i) {
out_u[i] = ClampUV(u[i >> 2] + (i & 1), width);
}
} else {
for (int i = 0; i < N * 4; ++i) {
out_u[i] = WrapUV(u[i >> 2] + (i & 1), width);
}
}
if (gstate.isTexCoordClampedT()) {
for (int i = 0; i < N * 4; ++i) {
out_v[i] = ClampUV(v[i >> 2] + ((i >> 1) & 1), height);
}
} else {
for (int i = 0; i < N * 4; ++i) {
out_v[i] = WrapUV(v[i >> 2] + ((i >> 1) & 1), height);
}
}
}
static inline void GetTexelCoordinates(int level, float s, float t, int& out_u, int& out_v)
{
int width = gstate.getTextureWidth(level);
int height = gstate.getTextureHeight(level);
int base_u = (int)(s * width * 256.0f + 0.375f);
int base_v = (int)(t * height * 256.0f + 0.375f);
base_u >>= 8;
base_v >>= 8;
ApplyTexelClamp<1>(&out_u, &out_v, &base_u, &base_v, width, height);
}
static inline void GetTexelCoordinatesQuad(int level, float in_s, float in_t, int u[4], int v[4], int &frac_u, int &frac_v)
{
// 8 bits of fractional UV
int width = gstate.getTextureWidth(level);
int height = gstate.getTextureHeight(level);
int base_u = (int)(in_s * width * 256.0f + 0.375f) - 128;
int base_v = (int)(in_t * height * 256.0f + 0.375f) - 128;
frac_u = (int)(base_u) & 0xff;
frac_v = (int)(base_v) & 0xff;
base_u >>= 8;
base_v >>= 8;
// Need to generate and individually wrap/clamp the four sample coordinates. Ugh.
ApplyTexelClampQuad<1>(u, v, &base_u, &base_v, width, height);
}
static inline void GetTextureCoordinates(const VertexData& v0, const VertexData& v1, const float p, float &s, float &t) {
switch (gstate.getUVGenMode()) {
case GE_TEXMAP_TEXTURE_COORDS:
case GE_TEXMAP_UNKNOWN:
case GE_TEXMAP_ENVIRONMENT_MAP:
{
// TODO: What happens if vertex has no texture coordinates?
// Note that for environment mapping, texture coordinates have been calculated during lighting
float q0 = 1.f / v0.clippos.w;
float q1 = 1.f / v1.clippos.w;
float wq0 = p * q0;
float wq1 = (1.0f - p) * q1;
float q_recip = 1.0f / (wq0 + wq1);
s = (v0.texturecoords.s() * wq0 + v1.texturecoords.s() * wq1) * q_recip;
t = (v0.texturecoords.t() * wq0 + v1.texturecoords.t() * wq1) * q_recip;
}
break;
case GE_TEXMAP_TEXTURE_MATRIX:
{
// projection mapping, TODO: Move this code to TransformUnit!
Vec3<float> source;
switch (gstate.getUVProjMode()) {
case GE_PROJMAP_POSITION:
source = (v0.modelpos * p + v1.modelpos * (1.0f - p));
break;
case GE_PROJMAP_UV:
source = Vec3f((v0.texturecoords * p + v1.texturecoords * (1.0f - p)), 0.0f);
break;
case GE_PROJMAP_NORMALIZED_NORMAL:
source = (v0.normal.Normalized() * p + v1.normal.Normalized() * (1.0f - p));
break;
case GE_PROJMAP_NORMAL:
source = (v0.normal * p + v1.normal * (1.0f - p));
break;
default:
ERROR_LOG_REPORT(G3D, "Software: Unsupported UV projection mode %x", gstate.getUVProjMode());
break;
}
Mat3x3<float> tgen(gstate.tgenMatrix);
Vec3<float> stq = tgen * source + Vec3<float>(gstate.tgenMatrix[9], gstate.tgenMatrix[10], gstate.tgenMatrix[11]);
float z_recip = 1.0f / stq.z;
s = stq.x * z_recip;
t = stq.y * z_recip;
}
break;
default:
ERROR_LOG_REPORT(G3D, "Software: Unsupported texture mapping mode %x!", gstate.getUVGenMode());
s = 0.0f;
t = 0.0f;
break;
}
}
static inline void GetTextureCoordinates(const VertexData& v0, const VertexData& v1, const VertexData& v2, const Vec4<int> &w0, const Vec4<int> &w1, const Vec4<int> &w2, const Vec4<float> &wsum_recip, Vec4<float> &s, Vec4<float> &t)
{
switch (gstate.getUVGenMode()) {
case GE_TEXMAP_TEXTURE_COORDS:
case GE_TEXMAP_UNKNOWN:
case GE_TEXMAP_ENVIRONMENT_MAP:
{
// TODO: What happens if vertex has no texture coordinates?
// Note that for environment mapping, texture coordinates have been calculated during lighting
float q0 = 1.f / v0.clippos.w;
float q1 = 1.f / v1.clippos.w;
float q2 = 1.f / v2.clippos.w;
Vec4<float> wq0 = w0.Cast<float>() * q0;
Vec4<float> wq1 = w1.Cast<float>() * q1;
Vec4<float> wq2 = w2.Cast<float>() * q2;
Vec4<float> q_recip = (wq0 + wq1 + wq2).Reciprocal();
s = Interpolate(v0.texturecoords.s(), v1.texturecoords.s(), v2.texturecoords.s(), wq0, wq1, wq2, q_recip);
t = Interpolate(v0.texturecoords.t(), v1.texturecoords.t(), v2.texturecoords.t(), wq0, wq1, wq2, q_recip);
}
break;
case GE_TEXMAP_TEXTURE_MATRIX:
for (int i = 0; i < 4; ++i) {
// projection mapping, TODO: Move this code to TransformUnit!
Vec3<float> source;
switch (gstate.getUVProjMode()) {
case GE_PROJMAP_POSITION:
source = (v0.modelpos * w0[i] + v1.modelpos * w1[i] + v2.modelpos * w2[i]) * wsum_recip[i];
break;
case GE_PROJMAP_UV:
source = Vec3f((v0.texturecoords * w0[i] + v1.texturecoords * w1[i] + v2.texturecoords * w2[i]) * wsum_recip[i], 0.0f);
break;
case GE_PROJMAP_NORMALIZED_NORMAL:
source = (v0.normal.Normalized() * w0[i] + v1.normal.Normalized() * w1[i] + v2.normal.Normalized() * w2[i]) * wsum_recip[i];
break;
case GE_PROJMAP_NORMAL:
source = (v0.normal * w0[i] + v1.normal * w1[i] + v2.normal * w2[i]) * wsum_recip[i];
break;
default:
ERROR_LOG_REPORT(G3D, "Software: Unsupported UV projection mode %x", gstate.getUVProjMode());
break;
}
Mat3x3<float> tgen(gstate.tgenMatrix);
Vec3<float> stq = tgen * source + Vec3<float>(gstate.tgenMatrix[9], gstate.tgenMatrix[10], gstate.tgenMatrix[11]);
float z_recip = 1.0f / stq.z;
s[i] = stq.x * z_recip;
t[i] = stq.y * z_recip;
}
break;
default:
ERROR_LOG_REPORT(G3D, "Software: Unsupported texture mapping mode %x!", gstate.getUVGenMode());
s = Vec4<float>::AssignToAll(0.0f);
t = Vec4<float>::AssignToAll(0.0f);
break;
}
}
// NOTE: These likely aren't endian safe
static inline u32 GetPixelColor(int x, int y)
{
switch (gstate.FrameBufFormat()) {
case GE_FORMAT_565:
return RGB565ToRGBA8888(fb.Get16(x, y, gstate.FrameBufStride()));
case GE_FORMAT_5551:
return RGBA5551ToRGBA8888(fb.Get16(x, y, gstate.FrameBufStride()));
case GE_FORMAT_4444:
return RGBA4444ToRGBA8888(fb.Get16(x, y, gstate.FrameBufStride()));
case GE_FORMAT_8888:
return fb.Get32(x, y, gstate.FrameBufStride());
case GE_FORMAT_INVALID:
_dbg_assert_msg_(G3D, false, "Software: invalid framebuf format.");
}
return 0;
}
static inline void SetPixelColor(int x, int y, u32 value)
{
switch (gstate.FrameBufFormat()) {
case GE_FORMAT_565:
fb.Set16(x, y, gstate.FrameBufStride(), RGBA8888ToRGB565(value));
break;
case GE_FORMAT_5551:
fb.Set16(x, y, gstate.FrameBufStride(), RGBA8888ToRGBA5551(value));
break;
case GE_FORMAT_4444:
fb.Set16(x, y, gstate.FrameBufStride(), RGBA8888ToRGBA4444(value));
break;
case GE_FORMAT_8888:
fb.Set32(x, y, gstate.FrameBufStride(), value);
break;
case GE_FORMAT_INVALID:
_dbg_assert_msg_(G3D, false, "Software: invalid framebuf format.");
}
}
static inline u16 GetPixelDepth(int x, int y)
{
return depthbuf.Get16(x, y, gstate.DepthBufStride());
}
static inline void SetPixelDepth(int x, int y, u16 value)
{
depthbuf.Set16(x, y, gstate.DepthBufStride(), value);
}
static inline u8 GetPixelStencil(int x, int y)
{
if (gstate.FrameBufFormat() == GE_FORMAT_565) {
// Always treated as 0 for comparison purposes.
return 0;
} else if (gstate.FrameBufFormat() == GE_FORMAT_5551) {
return ((fb.Get16(x, y, gstate.FrameBufStride()) & 0x8000) != 0) ? 0xFF : 0;
} else if (gstate.FrameBufFormat() == GE_FORMAT_4444) {
return Convert4To8(fb.Get16(x, y, gstate.FrameBufStride()) >> 12);
} else {
return fb.Get32(x, y, gstate.FrameBufStride()) >> 24;
}
}
static inline void SetPixelStencil(int x, int y, u8 value)
{
// TODO: This seems like it maybe respects the alpha mask (at least in some scenarios?)
if (gstate.FrameBufFormat() == GE_FORMAT_565) {
// Do nothing
} else if (gstate.FrameBufFormat() == GE_FORMAT_5551) {
u16 pixel = fb.Get16(x, y, gstate.FrameBufStride()) & ~0x8000;
pixel |= value != 0 ? 0x8000 : 0;
fb.Set16(x, y, gstate.FrameBufStride(), pixel);
} else if (gstate.FrameBufFormat() == GE_FORMAT_4444) {
u16 pixel = fb.Get16(x, y, gstate.FrameBufStride()) & ~0xF000;
pixel |= (u16)value << 12;
fb.Set16(x, y, gstate.FrameBufStride(), pixel);
} else {
u32 pixel = fb.Get32(x, y, gstate.FrameBufStride()) & ~0xFF000000;
pixel |= (u32)value << 24;
fb.Set32(x, y, gstate.FrameBufStride(), pixel);
}
}
static inline bool DepthTestPassed(int x, int y, u16 z)
{
u16 reference_z = GetPixelDepth(x, y);
switch (gstate.getDepthTestFunction()) {
case GE_COMP_NEVER:
return false;
case GE_COMP_ALWAYS:
return true;
case GE_COMP_EQUAL:
return (z == reference_z);
case GE_COMP_NOTEQUAL:
return (z != reference_z);
case GE_COMP_LESS:
return (z < reference_z);
case GE_COMP_LEQUAL:
return (z <= reference_z);
case GE_COMP_GREATER:
return (z > reference_z);
case GE_COMP_GEQUAL:
return (z >= reference_z);
default:
return 0;
}
}
static inline bool IsRightSideOrFlatBottomLine(const Vec2<int>& vertex, const Vec2<int>& line1, const Vec2<int>& line2)
{
if (line1.y == line2.y) {
// just check if vertex is above us => bottom line parallel to x-axis
return vertex.y < line1.y;
} else {
// check if vertex is on our left => right side
return vertex.x < line1.x + (line2.x - line1.x) * (vertex.y - line1.y) / (line2.y - line1.y);
}
}
static inline bool StencilTestPassed(u8 stencil)
{
// TODO: Does the masking logic make any sense?
stencil &= gstate.getStencilTestMask();
u8 ref = gstate.getStencilTestRef() & gstate.getStencilTestMask();
switch (gstate.getStencilTestFunction()) {
case GE_COMP_NEVER:
return false;
case GE_COMP_ALWAYS:
return true;
case GE_COMP_EQUAL:
return ref == stencil;
case GE_COMP_NOTEQUAL:
return ref != stencil;
case GE_COMP_LESS:
return ref < stencil;
case GE_COMP_LEQUAL:
return ref <= stencil;
case GE_COMP_GREATER:
return ref > stencil;
case GE_COMP_GEQUAL:
return ref >= stencil;
}
return true;
}
static inline u8 ApplyStencilOp(int op, int x, int y)
{
u8 old_stencil = GetPixelStencil(x, y); // TODO: Apply mask?
u8 reference_stencil = gstate.getStencilTestRef(); // TODO: Apply mask?
switch (op) {
case GE_STENCILOP_KEEP:
return old_stencil;
case GE_STENCILOP_ZERO:
return 0;
case GE_STENCILOP_REPLACE:
return reference_stencil;
case GE_STENCILOP_INVERT:
return ~old_stencil;
case GE_STENCILOP_INCR:
switch (gstate.FrameBufFormat()) {
case GE_FORMAT_8888:
if (old_stencil != 0xFF) {
return old_stencil + 1;
}
return old_stencil;
case GE_FORMAT_5551:
return 0xFF;
case GE_FORMAT_4444:
if (old_stencil < 0xF0) {
return old_stencil + 0x10;
}
return old_stencil;
default:
return old_stencil;
}
break;
case GE_STENCILOP_DECR:
switch (gstate.FrameBufFormat()) {
case GE_FORMAT_4444:
if (old_stencil >= 0x10)
return old_stencil - 0x10;
break;
default:
if (old_stencil != 0)
return old_stencil - 1;
return old_stencil;
}
break;
}
return old_stencil;
}
static inline u32 ApplyLogicOp(GELogicOp op, u32 old_color, u32 new_color)
{
switch (op) {
case GE_LOGIC_CLEAR:
new_color = 0;
break;
case GE_LOGIC_AND:
new_color = new_color & old_color;
break;
case GE_LOGIC_AND_REVERSE:
new_color = new_color & ~old_color;
break;
case GE_LOGIC_COPY:
//new_color = new_color;
break;
case GE_LOGIC_AND_INVERTED:
new_color = ~new_color & old_color;
break;
case GE_LOGIC_NOOP:
new_color = old_color;
break;
case GE_LOGIC_XOR:
new_color = new_color ^ old_color;
break;
case GE_LOGIC_OR:
new_color = new_color | old_color;
break;
case GE_LOGIC_NOR:
new_color = ~(new_color | old_color);
break;
case GE_LOGIC_EQUIV:
new_color = ~(new_color ^ old_color);
break;
case GE_LOGIC_INVERTED:
new_color = ~old_color;
break;
case GE_LOGIC_OR_REVERSE:
new_color = new_color | ~old_color;
break;
case GE_LOGIC_COPY_INVERTED:
new_color = ~new_color;
break;
case GE_LOGIC_OR_INVERTED:
new_color = ~new_color | old_color;
break;
case GE_LOGIC_NAND:
new_color = ~(new_color & old_color);
break;
case GE_LOGIC_SET:
new_color = 0xFFFFFFFF;
break;
}
return new_color;
}
static inline Vec4<int> GetTextureFunctionOutput(const Vec4<int>& prim_color, const Vec4<int>& texcolor)
{
Vec3<int> out_rgb;
int out_a;
bool rgba = gstate.isTextureAlphaUsed();
switch (gstate.getTextureFunction()) {
case GE_TEXFUNC_MODULATE:
{
#if defined(_M_SSE)
// We can be accurate up to 24 bit integers, should be enough.
const __m128 p = _mm_cvtepi32_ps(prim_color.ivec);
const __m128 t = _mm_cvtepi32_ps(texcolor.ivec);
out_rgb.ivec = _mm_cvtps_epi32(_mm_div_ps(_mm_mul_ps(p, t), _mm_set_ps1(255.0f)));
if (rgba) {
return Vec4<int>(out_rgb.ivec);
} else {
out_a = prim_color.a();
}
#else
out_rgb = prim_color.rgb() * texcolor.rgb() / 255;
out_a = (rgba) ? (prim_color.a() * texcolor.a() / 255) : prim_color.a();
#endif
break;
}
case GE_TEXFUNC_DECAL:
{
int t = (rgba) ? texcolor.a() : 255;
int invt = (rgba) ? 255 - t : 0;
out_rgb = (prim_color.rgb() * invt + texcolor.rgb() * t) / 255;
out_a = prim_color.a();
break;
}
case GE_TEXFUNC_BLEND:
{
const Vec3<int> const255(255, 255, 255);
const Vec3<int> texenv(gstate.getTextureEnvColR(), gstate.getTextureEnvColG(), gstate.getTextureEnvColB());
out_rgb = ((const255 - texcolor.rgb()) * prim_color.rgb() + texcolor.rgb() * texenv) / 255;
out_a = prim_color.a() * ((rgba) ? texcolor.a() : 255) / 255;
break;
}
case GE_TEXFUNC_REPLACE:
out_rgb = texcolor.rgb();
out_a = (rgba) ? texcolor.a() : prim_color.a();
break;
case GE_TEXFUNC_ADD:
out_rgb = prim_color.rgb() + texcolor.rgb();
if (out_rgb.r() > 255) out_rgb.r() = 255;
if (out_rgb.g() > 255) out_rgb.g() = 255;
if (out_rgb.b() > 255) out_rgb.b() = 255;
out_a = prim_color.a() * ((rgba) ? texcolor.a() : 255) / 255;
break;
default:
ERROR_LOG_REPORT(G3D, "Software: Unknown texture function %x", gstate.getTextureFunction());
out_rgb = Vec3<int>::AssignToAll(0);
out_a = 0;
}
return Vec4<int>(out_rgb.r(), out_rgb.g(), out_rgb.b(), out_a);
}
static inline bool ColorTestPassed(const Vec3<int> &color)
{
const u32 mask = gstate.getColorTestMask();
const u32 c = color.ToRGB() & mask;
const u32 ref = gstate.getColorTestRef() & mask;
switch (gstate.getColorTestFunction()) {
case GE_COMP_NEVER:
return false;
case GE_COMP_ALWAYS:
return true;
case GE_COMP_EQUAL:
return c == ref;
case GE_COMP_NOTEQUAL:
return c != ref;
default:
ERROR_LOG_REPORT(G3D, "Software: Invalid colortest function: %d", gstate.getColorTestFunction());
break;
}
return true;
}
static inline bool AlphaTestPassed(int alpha)
{
const u8 mask = gstate.getAlphaTestMask() & 0xFF;
const u8 ref = gstate.getAlphaTestRef() & mask;
alpha &= mask;
switch (gstate.getAlphaTestFunction()) {
case GE_COMP_NEVER:
return false;
case GE_COMP_ALWAYS:
return true;
case GE_COMP_EQUAL:
return (alpha == ref);
case GE_COMP_NOTEQUAL:
return (alpha != ref);
case GE_COMP_LESS:
return (alpha < ref);
case GE_COMP_LEQUAL:
return (alpha <= ref);
case GE_COMP_GREATER:
return (alpha > ref);
case GE_COMP_GEQUAL:
return (alpha >= ref);
}
return true;
}
static inline Vec3<int> GetSourceFactor(const Vec4<int>& source, const Vec4<int>& dst)
{
switch (gstate.getBlendFuncA()) {
case GE_SRCBLEND_DSTCOLOR:
return dst.rgb();
case GE_SRCBLEND_INVDSTCOLOR:
return Vec3<int>::AssignToAll(255) - dst.rgb();
case GE_SRCBLEND_SRCALPHA:
#if defined(_M_SSE)
return Vec3<int>(_mm_shuffle_epi32(source.ivec, _MM_SHUFFLE(3, 3, 3, 3)));
#else
return Vec3<int>::AssignToAll(source.a());
#endif
case GE_SRCBLEND_INVSRCALPHA:
#if defined(_M_SSE)
return Vec3<int>(_mm_sub_epi32(_mm_set1_epi32(255), _mm_shuffle_epi32(source.ivec, _MM_SHUFFLE(3, 3, 3, 3))));
#else
return Vec3<int>::AssignToAll(255 - source.a());
#endif
case GE_SRCBLEND_DSTALPHA:
return Vec3<int>::AssignToAll(dst.a());
case GE_SRCBLEND_INVDSTALPHA:
return Vec3<int>::AssignToAll(255 - dst.a());
case GE_SRCBLEND_DOUBLESRCALPHA:
return Vec3<int>::AssignToAll(2 * source.a());
case GE_SRCBLEND_DOUBLEINVSRCALPHA:
return Vec3<int>::AssignToAll(255 - std::min(2 * source.a(), 255));
case GE_SRCBLEND_DOUBLEDSTALPHA:
return Vec3<int>::AssignToAll(2 * dst.a());
case GE_SRCBLEND_DOUBLEINVDSTALPHA:
return Vec3<int>::AssignToAll(255 - std::min(2 * dst.a(), 255));
case GE_SRCBLEND_FIXA:
default:
// All other dest factors (> 10) are treated as FIXA.
return Vec3<int>::FromRGB(gstate.getFixA());
}
}
static inline Vec3<int> GetDestFactor(const Vec4<int>& source, const Vec4<int>& dst)
{
switch (gstate.getBlendFuncB()) {
case GE_DSTBLEND_SRCCOLOR:
return source.rgb();
case GE_DSTBLEND_INVSRCCOLOR:
return Vec3<int>::AssignToAll(255) - source.rgb();
case GE_DSTBLEND_SRCALPHA:
#if defined(_M_SSE)
return Vec3<int>(_mm_shuffle_epi32(source.ivec, _MM_SHUFFLE(3, 3, 3, 3)));
#else
return Vec3<int>::AssignToAll(source.a());
#endif
case GE_DSTBLEND_INVSRCALPHA:
#if defined(_M_SSE)
return Vec3<int>(_mm_sub_epi32(_mm_set1_epi32(255), _mm_shuffle_epi32(source.ivec, _MM_SHUFFLE(3, 3, 3, 3))));
#else
return Vec3<int>::AssignToAll(255 - source.a());
#endif
case GE_DSTBLEND_DSTALPHA:
return Vec3<int>::AssignToAll(dst.a());
case GE_DSTBLEND_INVDSTALPHA:
return Vec3<int>::AssignToAll(255 - dst.a());
case GE_DSTBLEND_DOUBLESRCALPHA:
return Vec3<int>::AssignToAll(2 * source.a());
case GE_DSTBLEND_DOUBLEINVSRCALPHA:
return Vec3<int>::AssignToAll(255 - std::min(2 * source.a(), 255));
case GE_DSTBLEND_DOUBLEDSTALPHA:
return Vec3<int>::AssignToAll(2 * dst.a());
case GE_DSTBLEND_DOUBLEINVDSTALPHA:
return Vec3<int>::AssignToAll(255 - std::min(2 * dst.a(), 255));
case GE_DSTBLEND_FIXB:
default:
// All other dest factors (> 10) are treated as FIXB.
return Vec3<int>::FromRGB(gstate.getFixB());
}
}
static inline Vec3<int> AlphaBlendingResult(const Vec4<int> &source, const Vec4<int> &dst)
{
// Note: These factors cannot go below 0, but they can go above 255 when doubling.
Vec3<int> srcfactor = GetSourceFactor(source, dst);
Vec3<int> dstfactor = GetDestFactor(source, dst);
switch (gstate.getBlendEq()) {
case GE_BLENDMODE_MUL_AND_ADD:
{
#if defined(_M_SSE)
const __m128 s = _mm_mul_ps(_mm_cvtepi32_ps(source.ivec), _mm_cvtepi32_ps(srcfactor.ivec));
const __m128 d = _mm_mul_ps(_mm_cvtepi32_ps(dst.ivec), _mm_cvtepi32_ps(dstfactor.ivec));
return Vec3<int>(_mm_cvtps_epi32(_mm_mul_ps(_mm_add_ps(s, d), _mm_set_ps1(1.0f / 255.0f))));
#else
return (source.rgb() * srcfactor + dst.rgb() * dstfactor) / 255;
#endif
}
case GE_BLENDMODE_MUL_AND_SUBTRACT:
{
#if defined(_M_SSE)
const __m128 s = _mm_mul_ps(_mm_cvtepi32_ps(source.ivec), _mm_cvtepi32_ps(srcfactor.ivec));
const __m128 d = _mm_mul_ps(_mm_cvtepi32_ps(dst.ivec), _mm_cvtepi32_ps(dstfactor.ivec));
return Vec3<int>(_mm_cvtps_epi32(_mm_mul_ps(_mm_sub_ps(s, d), _mm_set_ps1(1.0f / 255.0f))));
#else
return (source.rgb() * srcfactor - dst.rgb() * dstfactor) / 255;
#endif
}
case GE_BLENDMODE_MUL_AND_SUBTRACT_REVERSE:
{
#if defined(_M_SSE)
const __m128 s = _mm_mul_ps(_mm_cvtepi32_ps(source.ivec), _mm_cvtepi32_ps(srcfactor.ivec));
const __m128 d = _mm_mul_ps(_mm_cvtepi32_ps(dst.ivec), _mm_cvtepi32_ps(dstfactor.ivec));
return Vec3<int>(_mm_cvtps_epi32(_mm_mul_ps(_mm_sub_ps(d, s), _mm_set_ps1(1.0f / 255.0f))));
#else
return (dst.rgb() * dstfactor - source.rgb() * srcfactor) / 255;
#endif
}
case GE_BLENDMODE_MIN:
return Vec3<int>(std::min(source.r(), dst.r()),
std::min(source.g(), dst.g()),
std::min(source.b(), dst.b()));
case GE_BLENDMODE_MAX:
return Vec3<int>(std::max(source.r(), dst.r()),
std::max(source.g(), dst.g()),
std::max(source.b(), dst.b()));
case GE_BLENDMODE_ABSDIFF:
return Vec3<int>(::abs(source.r() - dst.r()),
::abs(source.g() - dst.g()),
::abs(source.b() - dst.b()));
default:
ERROR_LOG_REPORT(G3D, "Software: Unknown blend function %x", gstate.getBlendEq());
return Vec3<int>();
}
}
template <bool clearMode>
inline void DrawSinglePixel(const DrawingCoords &p, u16 z, u8 fog, const Vec4<int> &color_in) {
Vec4<int> prim_color = color_in;
// Depth range test
// TODO: Clear mode?
if (!gstate.isModeThrough())
if (z < gstate.getDepthRangeMin() || z > gstate.getDepthRangeMax())
return;
if (gstate.isColorTestEnabled() && !clearMode)
if (!ColorTestPassed(prim_color.rgb()))
return;
// TODO: Does a need to be clamped?
if (gstate.isAlphaTestEnabled() && !clearMode)
if (!AlphaTestPassed(prim_color.a()))
return;
// In clear mode, it uses the alpha color as stencil.
u8 stencil = clearMode ? prim_color.a() : GetPixelStencil(p.x, p.y);
// TODO: Is it safe to ignore gstate.isDepthTestEnabled() when clear mode is enabled? Probably yes
if (!clearMode && (gstate.isStencilTestEnabled() || gstate.isDepthTestEnabled())) {
if (gstate.isStencilTestEnabled() && !StencilTestPassed(stencil)) {
stencil = ApplyStencilOp(gstate.getStencilOpSFail(), p.x, p.y);
SetPixelStencil(p.x, p.y, stencil);
return;
}
// Also apply depth at the same time. If disabled, same as passing.
if (gstate.isDepthTestEnabled() && !DepthTestPassed(p.x, p.y, z)) {
if (gstate.isStencilTestEnabled()) {
stencil = ApplyStencilOp(gstate.getStencilOpZFail(), p.x, p.y);
SetPixelStencil(p.x, p.y, stencil);
}
return;
} else if (gstate.isStencilTestEnabled()) {
stencil = ApplyStencilOp(gstate.getStencilOpZPass(), p.x, p.y);
}
if (gstate.isDepthTestEnabled() && gstate.isDepthWriteEnabled()) {
SetPixelDepth(p.x, p.y, z);
}
} else if (clearMode && gstate.isClearModeDepthMask()) {
SetPixelDepth(p.x, p.y, z);
}
// Doubling happens only when texturing is enabled, and after tests.
if (gstate.isTextureMapEnabled() && gstate.isColorDoublingEnabled() && !clearMode) {
// TODO: Does this need to be clamped before blending?
prim_color.r() <<= 1;
prim_color.g() <<= 1;
prim_color.b() <<= 1;
}
if (gstate.isFogEnabled() && !gstate.isModeThrough() && !clearMode) {
Vec3<int> fogColor = Vec3<int>::FromRGB(gstate.fogcolor);
fogColor = (prim_color.rgb() * (int)fog + fogColor * (255 - (int)fog)) / 255;
prim_color.r() = fogColor.r();
prim_color.g() = fogColor.g();
prim_color.b() = fogColor.b();
}
const u32 old_color = GetPixelColor(p.x, p.y);
u32 new_color;
if (gstate.isAlphaBlendEnabled() && !clearMode) {
const Vec4<int> dst = Vec4<int>::FromRGBA(old_color);
// ToRGBA() always automatically clamps.
new_color = AlphaBlendingResult(prim_color, dst).ToRGB();
new_color |= stencil << 24;
} else {
#if defined(_M_SSE)
new_color = Vec3<int>(prim_color.ivec).ToRGB();
new_color |= stencil << 24;
#else
new_color = Vec4<int>(prim_color.r(), prim_color.g(), prim_color.b(), stencil).ToRGBA();
#endif
}
// Logic ops are applied after blending (if blending is enabled.)
if (gstate.isLogicOpEnabled() && !clearMode) {
// Logic ops don't affect stencil.
new_color = (stencil << 24) | (ApplyLogicOp(gstate.getLogicOp(), old_color, new_color) & 0x00FFFFFF);
}
if (clearMode) {
new_color = (new_color & ~gstate.getClearModeColorMask()) | (old_color & gstate.getClearModeColorMask());
}
new_color = (new_color & ~gstate.getColorMask()) | (old_color & gstate.getColorMask());
// TODO: Dither before or inside SetPixelColor
SetPixelColor(p.x, p.y, new_color);
}
static inline void ApplyTexturing(Sampler::Funcs sampler, Vec4<int> &prim_color, float s, float t, int texlevel, int frac_texlevel, bool bilinear, u8 *texptr[], int texbufw[]) {
int u[8] = {0}, v[8] = {0}; // 1.23.8 fixed point
int frac_u[2], frac_v[2];
Vec4<int> texcolor0;
Vec4<int> texcolor1;
const u8 *tptr0 = texptr[texlevel];
int bufw0 = texbufw[texlevel];
const u8 *tptr1 = texptr[texlevel + 1];
int bufw1 = texbufw[texlevel + 1];