[dense] Add SIMD support to rasterizer
* src/dense/ftdense: Use SSE4.1 for final accumulation step (FT_SSE4_1): Macro which checks if SSE4.1 is available * src/dense/rules.mk: Enable linking for SSE4.1
This commit is contained in:
parent
03cc2183e0
commit
bdeb70bc18
|
@ -12,6 +12,22 @@
|
|||
#include "ftdense.h"
|
||||
#include "ftdenseerrs.h"
|
||||
|
||||
#if defined( __SSE4_1__ ) || \
|
||||
defined( __x86_64__ ) || \
|
||||
defined( _M_AMD64 ) || \
|
||||
( defined( _M_IX86_FP ) && _M_IX86_FP >= 2 )
|
||||
# define FT_SSE4_1 1
|
||||
#else
|
||||
# define FT_SSE4_1 0
|
||||
#endif
|
||||
|
||||
|
||||
#if FT_SSE4_1
|
||||
|
||||
#include <tmmintrin.h>
|
||||
|
||||
#endif
|
||||
|
||||
#define PIXEL_BITS 8
|
||||
|
||||
#define ONE_PIXEL ( 1 << PIXEL_BITS )
|
||||
|
@ -349,9 +365,30 @@ dense_render_glyph( dense_worker* worker, const FT_Bitmap* target )
|
|||
&dense_decompose_funcs, worker );
|
||||
// Render into bitmap
|
||||
const float* source = worker->m_a;
|
||||
|
||||
unsigned char* dest = target->buffer;
|
||||
unsigned char* dest_end = target->buffer + worker->m_w * worker->m_h;
|
||||
|
||||
#if FT_SSE4_1
|
||||
|
||||
__m128 offset = _mm_setzero_ps();
|
||||
__m128i mask = _mm_set1_epi32(0x0c080400);
|
||||
__m128 sign_mask = _mm_set1_ps(-0.f);
|
||||
for (int i = 0; i < worker->m_h*worker->m_w; i += 4) {
|
||||
__m128 x = _mm_load_ps(&source[i]);
|
||||
x = _mm_add_ps(x, _mm_castsi128_ps(_mm_slli_si128(_mm_castps_si128(x), 4)));
|
||||
x = _mm_add_ps(x, _mm_shuffle_ps(_mm_setzero_ps(), x, 0x40));
|
||||
x = _mm_add_ps(x, offset);
|
||||
__m128 y = _mm_andnot_ps(sign_mask, x); // fabs(x)
|
||||
y = _mm_min_ps(y, _mm_set1_ps(1.0f));
|
||||
y = _mm_mul_ps(y, _mm_set1_ps(255.0f));
|
||||
__m128i z = _mm_cvtps_epi32(y);
|
||||
z = _mm_shuffle_epi8(z, mask);
|
||||
_mm_store_ss((float *)&dest[i], (__m128)z);
|
||||
offset = _mm_shuffle_ps(x, x, _MM_SHUFFLE(3, 3, 3, 3));
|
||||
}
|
||||
|
||||
#else /* FT_SSE4_1 */
|
||||
|
||||
float value = 0.0f;
|
||||
while ( dest < dest_end )
|
||||
{
|
||||
|
@ -368,6 +405,8 @@ dense_render_glyph( dense_worker* worker, const FT_Bitmap* target )
|
|||
dest++;
|
||||
}
|
||||
|
||||
#endif /* FT_SSE4_1 */
|
||||
|
||||
free(worker->m_a);
|
||||
return error;
|
||||
}
|
||||
|
|
|
@ -22,9 +22,9 @@ DENSE_DIR := $(SRC_DIR)/dense
|
|||
#
|
||||
DENSE_COMPILE := $(CC) $(ANSIFLAGS) \
|
||||
$I$(subst /,$(COMPILER_SEP),$(DENSE_DIR)) \
|
||||
$(INCLUDE_FLAGS) \
|
||||
$(FT_CFLAGS)
|
||||
|
||||
$(INCLUDE_FLAGS) \
|
||||
$(FT_CFLAGS) \
|
||||
"-msse4.1"
|
||||
|
||||
# DENSE driver sources (i.e., C files)
|
||||
#
|
||||
|
|
Loading…
Reference in New Issue