krzosa/software_rasterizer
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Big speed boots!

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This commit is contained in:
Krzosa Karol
2022-07-05 21:05:26 +02:00
parent 2d2615b6c9
commit 58cd147ee1
1 changed files with 22 additions and 22 deletions
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44
main.cpp
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@@ -338,11 +338,8 @@ void draw_triangle_nearest(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 lig
F32x8 var0 = _mm256_set1_ps(0);
F32x8 var_max_x = _mm256_set1_ps(max_x);
F32x8 var07 = _mm256_set_ps(7,6,5,4,3,2,1,0);
// F32x8 var1 = _mm256_set1_ps(1);
Vec8 var1 = vec8(1);
Vec8I var0i = vec8i(0);
Vec8I var1i = vec8i(1);
Vec8 var1_8 = vec8(1,2,3,4,5,6,7,8);
Vec8 Dy10 = vec8(dy10) * var1_8;
Vec8 Dy21 = vec8(dy21) * var1_8;
@@ -350,6 +347,13 @@ void draw_triangle_nearest(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 lig
F32x8 var_src_x_minus_one = _mm256_set1_ps(src->x-1);
F32x8 var_src_y_minus_one = _mm256_set1_ps(src->y-1);
S32x8 var_src_y_minus_one_int = _mm256_set1_epi32(src->y-1);
S32x8 var_src_x_int = _mm256_set1_epi32(src->x);
S32x8 var_0xff000000 = _mm256_set1_epi32(0xff000000);
S32x8 var_0x00ff0000 = _mm256_set1_epi32(0x00ff0000);
S32x8 var_0x0000ff00 = _mm256_set1_epi32(0x0000ff00);
S32x8 var_0x000000ff = _mm256_set1_epi32(0x000000ff);
F32x8 var_tex0x = _mm256_set1_ps(tex0.x);
F32x8 var_tex1x = _mm256_set1_ps(tex1.x);
@@ -456,31 +460,27 @@ void draw_triangle_nearest(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 lig
// Origin UV (0,0) is in bottom left
_mm256_maskstore_epi32((int *)depth_pointer, should_fill, interpolated_w);
S32x8 indices0 = _mm256_set1_epi32(src->y - 1);
S32x8 indices1 = _mm256_sub_epi32(indices0, vi);
S32x8 indices3 = _mm256_mullo_epi32(_mm256_set1_epi32(src->x), indices1);
S32x8 indices1 = _mm256_sub_epi32(var_src_y_minus_one_int, vi);
S32x8 indices3 = _mm256_mullo_epi32(var_src_x_int, indices1);
S32x8 indices = _mm256_add_epi32(indices3, ui);
//
// Fetch and calculate texel values
//
Vec8I pixel;
if(I(should_fill, 0)) pixel.e[0] = src->pixels[Is(indices, 0)];
if(I(should_fill, 1)) pixel.e[1] = src->pixels[Is(indices, 1)];
if(I(should_fill, 2)) pixel.e[2] = src->pixels[Is(indices, 2)];
if(I(should_fill, 3)) pixel.e[3] = src->pixels[Is(indices, 3)];
if(I(should_fill, 4)) pixel.e[4] = src->pixels[Is(indices, 4)];
if(I(should_fill, 5)) pixel.e[5] = src->pixels[Is(indices, 5)];
if(I(should_fill, 6)) pixel.e[6] = src->pixels[Is(indices, 6)];
if(I(should_fill, 7)) pixel.e[7] = src->pixels[Is(indices, 7)];
S32x8 pixel;
if(I(should_fill, 0)) Is(pixel, 0) = src->pixels[Is(indices, 0)];
if(I(should_fill, 1)) Is(pixel, 1) = src->pixels[Is(indices, 1)];
if(I(should_fill, 2)) Is(pixel, 2) = src->pixels[Is(indices, 2)];
if(I(should_fill, 3)) Is(pixel, 3) = src->pixels[Is(indices, 3)];
if(I(should_fill, 4)) Is(pixel, 4) = src->pixels[Is(indices, 4)];
if(I(should_fill, 5)) Is(pixel, 5) = src->pixels[Is(indices, 5)];
if(I(should_fill, 6)) Is(pixel, 6) = src->pixels[Is(indices, 6)];
if(I(should_fill, 7)) Is(pixel, 7) = src->pixels[Is(indices, 7)];
Vec8I texel_i_a = pixel & vec8i(0xff000000);
Vec8I texel_i_b = pixel & vec8i(0x00ff0000);
Vec8I texel_i_g = pixel & vec8i(0x0000ff00);
Vec8I texel_i_r = pixel & vec8i(0x000000ff);
Vec8I texel_i_a = {_mm256_and_si256(pixel, var_0xff000000)};
Vec8I texel_i_b = {_mm256_and_si256(pixel, var_0x00ff0000)};
Vec8I texel_i_g = {_mm256_and_si256(pixel, var_0x0000ff00)};
Vec8I texel_i_r = {_mm256_and_si256(pixel, var_0x000000ff)};
// Alpha is done this way because signed integer shift is weird
// When sign bit is set it sets all bits that we shift the sign through