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Accelerate ImageClearBackground

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doyle 2020-07-04 21:23:57 +10:00
parent 540d7abc4d
commit 77a949cfe7
1 changed files with 60 additions and 1 deletions
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59
RaylibSIMD.h
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@ -487,9 +487,68 @@ void RaylibSIMD_ImageDrawRectangle(Image *dst, int posX, int posY, int width, in
RaylibSIMD_ImageDrawRectangleRec(dst, (Rectangle){RS_CAST(float)posX, RS_CAST(float)posY, RS_CAST(float)width, RS_CAST(float)height}, color);
}
RS_FILE_SCOPE int RaylibSIMD__FormatToBitsPerPixel(int format)
{
int result = 4;
switch (format)
{
case UNCOMPRESSED_GRAYSCALE: result = 8; break;
case UNCOMPRESSED_GRAY_ALPHA:
case UNCOMPRESSED_R5G6B5:
case UNCOMPRESSED_R5G5B5A1:
case UNCOMPRESSED_R4G4B4A4: result = 16; break;
case UNCOMPRESSED_R8G8B8A8: result = 32; break;
case UNCOMPRESSED_R8G8B8: result = 24; break;
case UNCOMPRESSED_R32: result = 32; break;
case UNCOMPRESSED_R32G32B32: result = 32*3; break;
case UNCOMPRESSED_R32G32B32A32: result = 32*4; break;
case COMPRESSED_DXT1_RGB:
case COMPRESSED_DXT1_RGBA:
case COMPRESSED_ETC1_RGB:
case COMPRESSED_ETC2_RGB:
case COMPRESSED_PVRT_RGB:
case COMPRESSED_PVRT_RGBA: result = 4; break;
case COMPRESSED_DXT3_RGBA:
case COMPRESSED_DXT5_RGBA:
case COMPRESSED_ETC2_EAC_RGBA:
case COMPRESSED_ASTC_4x4_RGBA: result = 8; break;
case COMPRESSED_ASTC_8x8_RGBA: result = 2; break;
default: break;
}
return result;
}
void RaylibSIMD_ImageClearBackground(Image *dst, Color color)
{
if (dst->format == UNCOMPRESSED_R8G8B8A8)
{
int bits_per_pixel = RaylibSIMD__FormatToBitsPerPixel(dst->format);
int bytes_per_pixel = bits_per_pixel / 8;
int total_pixels = dst->width * dst->height;
int const SIMD_WIDTH = 4;
int simd_iterations = total_pixels / SIMD_WIDTH;
int remaining_iterations = total_pixels % SIMD_WIDTH;
uint32_t color_u32 = RaylibSIMD__ColorToU32(color);
__m128i color_u32_4x = _mm_set1_epi32(color_u32);
unsigned char *dest = dst->data;
for (int iteration = 0; iteration < simd_iterations; iteration++)
{
_mm_storeu_si128((__m128i *)dest, color_u32_4x);
dest += (bytes_per_pixel * SIMD_WIDTH);
}
for (int iteration = 0; iteration < remaining_iterations; iteration++)
*dest++ = color_u32;
}
else
{
// TODO(doyle): SIMD this path
RaylibSIMD_ImageDrawRectangle(dst, 0, 0, dst->width, dst->height, color);
}
}
#endif // RAYLIB_SIMD_IMPLEMENTATION