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freetype2
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Code Issues 4 Releases Wiki Activity

Speed-up SIMD

This commit is contained in:
Anurag Thakur 2023-10-05 03:46:59 +05:30
parent 70e807cef5
commit 66375b4408
2 changed files with 20 additions and 5 deletions
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2
src/base/ftobjs.c
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@ -3154,7 +3154,7 @@ int conic_to2(FT_GlyphSlot* slot, FT_Vector *control, FT_Vector *from, FT_Vector
face->garray = (FT_GlyphSlot*)malloc(
face->driver->clazz->slot_object_size * face->num_glyphs );
//error = FT_Set_Char_Size( face, 0, 160 * 64, 300, 300 );
error = FT_Set_Pixel_Sizes( face, 0, 50);
error = FT_Set_Pixel_Sizes( face, 0, 500);
// int glyph_index = FT_Get_Char_Index( face, 'A' );
// error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_HINTING );

23
src/dense/ftdense.c
View File

@ -454,6 +454,7 @@ dense_render_glyph( dense_worker* worker, const FT_Bitmap* target, FT_PreLine pl
__m128i offset = _mm_setzero_si128();
__m128i mask = _mm_set1_epi32( 0x0c080400 );
__m128i nzero = _mm_castps_si128(_mm_set1_ps(-0.0));
for (int i = 0; i < worker->m_h*worker->m_w; i += 4)
{
@ -463,18 +464,31 @@ __m128i offset = _mm_setzero_si128();
x = _mm_add_epi32( x, _mm_slli_si128( x, 4 ) );
x = _mm_add_epi32(
x, _mm_castps_si128( _mm_shuffle_ps( _mm_setzero_ps(),
_mm_castsi128_ps( x ), 0x40 ) ) );
// x = _mm_add_epi32(
// x, _mm_castps_si128( _mm_shuffle_ps( _mm_setzero_ps(),
// _mm_castsi128_ps( x ), 0x40 ) ) );
x = _mm_add_epi32(x, _mm_slli_si128(x,8));
// add the prefsum of previous 4 floats to all current floats
x = _mm_add_epi32( x, offset );
// __m128 y = _mm_mul_ps(_mm_castsi128_ps(x), _mm_set1_ps(255.9));
// y = _mm_andnot_ps(_mm_castsi128_ps(nzero), y);
// __m128i z = _mm_cvttps_epi32(y);
// z = _mm_packus_epi16(_mm_packs_epi32(z, nzero), nzero);
// *((int*)dest+i) = _mm_extract_epi16(z, 0);
// take absolute value
__m128i y = _mm_abs_epi32( x ); // fabs(x)
// cap max value to 1
y = _mm_min_epi32( y, _mm_set1_epi32( 4080 ) );
y = _mm_min_epi32( y, _mm_set1_epi32( 4094 ) );
// reduce to 255
y = _mm_srli_epi32( y, 4 );
@ -488,6 +502,7 @@ __m128i offset = _mm_setzero_si128();
offset = _mm_castps_si128( _mm_shuffle_ps( _mm_castsi128_ps( x ),
_mm_castsi128_ps( x ),
_MM_SHUFFLE( 3, 3, 3, 3 ) ) );
//offset = _mm_set1_epi32(_mm_extract_epi32(x, 3));
}
#else /* FT_SSE4_1 */