doylet/DTRenderer
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

SetPixel accelerated with SIMD

Browse Source
This commit is contained in:
Doyle Thai 2017-05-30 18:46:04 +10:00
parent c1a5b41442
commit bb5fc03bda
1 changed files with 66 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

77
src/DTRendererRender.cpp
View File

@ -60,11 +60,19 @@ inline f32 DTRRender_SRGB1ToLinearSpacef(f32 val)
inline DqnV4 DTRRender_SRGB1ToLinearSpaceV4(DqnV4 color)
{
DqnV4 result = {};
DqnV4 result;
#if 0
result.r = DTRRender_SRGB1ToLinearSpacef(color.r);
result.g = DTRRender_SRGB1ToLinearSpacef(color.g);
result.b = DTRRender_SRGB1ToLinearSpacef(color.b);
result.a = color.a;
#else
__m128 simdColor = _mm_set_ps(color.r, color.g, color.b, 0);
__m128 simdResult = _mm_mul_ps(simdColor, simdColor);
result.r = ((f32 *)&simdResult)[3];
result.g = ((f32 *)&simdResult)[2];
result.b = ((f32 *)&simdResult)[1];
#endif
result.a = color.a;
return result;
}
@ -79,11 +87,19 @@ inline f32 DTRRender_LinearToSRGB1Spacef(f32 val)
inline DqnV4 DTRRender_LinearToSRGB1SpaceV4(DqnV4 color)
{
DqnV4 result = {};
DqnV4 result;
#if 0
result.r = DTRRender_LinearToSRGB1Spacef(color.r);
result.g = DTRRender_LinearToSRGB1Spacef(color.g);
result.b = DTRRender_LinearToSRGB1Spacef(color.b);
result.a = color.a;
#else
__m128 simdColor = _mm_set_ps(color.r, color.g, color.b, 0);
__m128 simdResult = _mm_sqrt_ps(simdColor);
result.r = ((f32 *)&simdResult)[3];
result.g = ((f32 *)&simdResult)[2];
result.b = ((f32 *)&simdResult)[1];
#endif
result.a = color.a;
return result;
}
@ -116,7 +132,8 @@ FILE_SCOPE inline void SetPixel(DTRRenderBuffer *const renderBuffer, const i32 x
bool needGammaFix = (color.a > 0.0f || color.a < 1.0f + COLOR_EPSILON) && (colorSpace == ColorSpace_SRGB);
if (needGammaFix) color = DTRRender_SRGB1ToLinearSpaceV4(color);
u32 src = bitmapPtr[x + (y * pitchInU32)];
u32 src = bitmapPtr[x + (y * pitchInU32)];
#if 0
f32 srcR = (f32)((src >> 16) & 0xFF) * DTRRENDER_INV_255;
f32 srcG = (f32)((src >> 8) & 0xFF) * DTRRENDER_INV_255;
f32 srcB = (f32)((src >> 0) & 0xFF) * DTRRENDER_INV_255;
@ -136,28 +153,66 @@ FILE_SCOPE inline void SetPixel(DTRRenderBuffer *const renderBuffer, const i32 x
destG = DTRRender_LinearToSRGB1Spacef(destG) * 255.0f;
destB = DTRRender_LinearToSRGB1Spacef(destB) * 255.0f;
DQN_ASSERT(destR >= 0);
DQN_ASSERT(destG >= 0);
DQN_ASSERT(destB >= 0);
if (DTR_DEBUG)
{
DQN_ASSERT((destR - 255.0f) < COLOR_EPSILON);
DQN_ASSERT((destG - 255.0f) < COLOR_EPSILON);
DQN_ASSERT((destB - 255.0f) < COLOR_EPSILON);
}
if (destR > 255.0f)
{
DQN_ASSERT((destR - 255.0f) < COLOR_EPSILON);
destR = 255;
}
if (destG > 255.0f)
{
DQN_ASSERT((destG - 255.0f) < COLOR_EPSILON);
destG = 255;
}
if (destB > 255.0f)
{
DQN_ASSERT((destB - 255.0f) < COLOR_EPSILON);
destB = 255;
}
#else
__m128 simdSrc = _mm_set_ps(0.0f,
(f32)((src >> 16) & 0xFF),
(f32)((src >> 8) & 0xFF),
(f32)((src >> 0) & 0xFF));
__m128 inv255_4x = _mm_set_ps1(DTRRENDER_INV_255);
simdSrc = _mm_mul_ps(simdSrc, inv255_4x);
simdSrc = _mm_mul_ps(simdSrc, simdSrc); // to linear
f32 invANorm = 1 - color.a;
__m128 invANorm_4x = _mm_set_ps1(invANorm);
__m128 const255_4x = _mm_set_ps1(255.0f);
__m128 simdColor = _mm_set_ps(0, color.r, color.g, color.b);
__m128 dest = _mm_add_ps(simdColor, _mm_mul_ps(simdSrc, invANorm_4x)); // to 0->1 range
dest = _mm_sqrt_ps(dest); // to srgb
dest = _mm_mul_ps(dest, const255_4x); // to 0->255 range
DQN_ASSERT(((f32 *)&dest)[2] >= 0);
DQN_ASSERT(((f32 *)&dest)[1] >= 0);
DQN_ASSERT(((f32 *)&dest)[0] >= 0);
if (DTR_DEBUG)
{
DQN_ASSERT((((f32 *)&dest)[2] - 255.0f) < COLOR_EPSILON);
DQN_ASSERT((((f32 *)&dest)[1] - 255.0f) < COLOR_EPSILON);
DQN_ASSERT((((f32 *)&dest)[0] - 255.0f) < COLOR_EPSILON);
}
dest = _mm_min_ps(dest, const255_4x);
f32 destR = ((f32 *)&dest)[2];
f32 destG = ((f32 *)&dest)[1];
f32 destB = ((f32 *)&dest)[0];
#endif
u32 pixel = // ((u32)(destA) << 24 |
(u32)(destR) << 16 |
(u32)(destG) << 8 |