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#version 310 es
layout (local_size_x = 8, local_size_y = 8) in;
layout (binding = 0) readonly buffer InBufY {
uint data[];
} in_buf_y;
layout (binding = 1) readonly buffer InBufUV {
uint data[];
} in_buf_uv;
layout (binding = 2) writeonly buffer OutBufY {
uint data[];
} out_buf_y;
layout (binding = 3) writeonly buffer OutBufUV {
uint data[];
} out_buf_uv;
layout (binding = 4) readonly buffer GeoMapTable {
vec2 data[];
} lut;
layout (push_constant) uniform PushConsts {
uint in_img_width;
uint in_img_height;
uint out_img_width;
uint out_img_height;
uint lut_width;
uint lut_height;
float lut_step[4];
float lut_std_step[2];
} prop;
#define UNIT_SIZE 4u
#define unpack_unorm_y(index) \
{ \
vec4 value = unpackUnorm4x8 (in_buf_y.data[index00[index]]); \
out_y00[index] = value[x00_fract[index]]; \
value = unpackUnorm4x8 (in_buf_y.data[index01[index]]); \
out_y01[index] = value[x01_fract[index]]; \
value = unpackUnorm4x8 (in_buf_y.data[index10[index]]); \
out_y10[index] = value[x10_fract[index]]; \
value = unpackUnorm4x8 (in_buf_y.data[index11[index]]); \
out_y11[index] = value[x11_fract[index]]; \
}
void geomap_y (vec4 lut_x, vec4 lut_y, out vec4 in_img_x, out vec4 in_img_y, out bvec4 out_bound, out uint out_data);
void geomap_uv (vec2 in_uv_x, vec2 in_uv_y, bvec4 out_bound_uv, out uint out_data);
void main ()
{
uint g_x = gl_GlobalInvocationID.x;
uint g_y = gl_GlobalInvocationID.y * 2u;
vec2 cent = (vec2 (prop.out_img_width, prop.out_img_height) - 1.0f) / 2.0f;
vec2 step = g_x < uint (cent.x) ? vec2 (prop.lut_step[0], prop.lut_step[1]) :
vec2 (prop.lut_step[2], prop.lut_step[3]);
vec2 start = (vec2 (g_x, g_y) - cent) * step + cent * vec2 (prop.lut_std_step[0], prop.lut_std_step[1]);
vec4 lut_x = start.x * float (UNIT_SIZE) + vec4 (0.0f, step.x, step.x * 2.0f, step.x * 3.0f);
vec4 lut_y = start.yyyy;
lut_x = clamp (lut_x, 0.0f, float (prop.lut_width) - 1.0f);
lut_y = clamp (lut_y, 0.0f, float (prop.lut_height) - 1.0f - step.y);
uint out_data;
vec4 in_img_x, in_img_y;
bvec4 out_bound;
geomap_y (lut_x, lut_y, in_img_x, in_img_y, out_bound, out_data);
out_buf_y.data[g_y * prop.out_img_width + g_x] = out_data;
bvec4 out_bound_uv = out_bound.xxzz;
if (all (out_bound_uv)) {
out_data = packUnorm4x8 (vec4 (0.5f));
} else {
vec2 in_uv_x = in_img_x.xz;
vec2 in_uv_y = in_img_y.xz / 2.0f;
in_uv_y = clamp (in_uv_y, 0.0f, float (prop.in_img_height / 2u - 1u));
geomap_uv (in_uv_x, in_uv_y, out_bound_uv, out_data);
}
out_buf_uv.data[g_y / 2u * prop.out_img_width + g_x] = out_data;
lut_y += step.y;
geomap_y (lut_x, lut_y, in_img_x, in_img_y, out_bound, out_data);
out_buf_y.data[(g_y + 1u) * prop.out_img_width + g_x] = out_data;
}
void geomap_y (vec4 lut_x, vec4 lut_y, out vec4 in_img_x, out vec4 in_img_y, out bvec4 out_bound, out uint out_data)
{
uvec4 x00 = uvec4 (lut_x);
uvec4 y00 = uvec4 (lut_y);
uvec4 x01 = x00 + 1u;
uvec4 y01 = y00;
uvec4 x10 = x00;
uvec4 y10 = y00 + 1u;
uvec4 x11 = x01;
uvec4 y11 = y10;
vec4 fract_x = fract (lut_x);
vec4 fract_y = fract (lut_y);
vec4 weight00 = (1.0f - fract_x) * (1.0f - fract_y);
vec4 weight01 = fract_x * (1.0f - fract_y);
vec4 weight10 = (1.0f - fract_x) * fract_y;
vec4 weight11 = fract_x * fract_y;
uvec4 index00 = y00 * prop.lut_width + x00;
uvec4 index01 = y01 * prop.lut_width + x01;
uvec4 index10 = y10 * prop.lut_width + x10;
uvec4 index11 = y11 * prop.lut_width + x11;
vec4 in_img_x00, in_img_x01, in_img_x10, in_img_x11;
vec4 in_img_y00, in_img_y01, in_img_y10, in_img_y11;
for (uint i = 0u; i < UNIT_SIZE; ++i) {
vec2 value = lut.data[index00[i]];
in_img_x00[i] = value.x;
in_img_y00[i] = value.y;
value = lut.data[index01[i]];
in_img_x01[i] = value.x;
in_img_y01[i] = value.y;
value = lut.data[index10[i]];
in_img_x10[i] = value.x;
in_img_y10[i] = value.y;
value = lut.data[index11[i]];
in_img_x11[i] = value.x;
in_img_y11[i] = value.y;
}
in_img_x = in_img_x00 * weight00 + in_img_x01 * weight01 + in_img_x10 * weight10 + in_img_x11 * weight11;
in_img_y = in_img_y00 * weight00 + in_img_y01 * weight01 + in_img_y10 * weight10 + in_img_y11 * weight11;
for (uint i = 0u; i < UNIT_SIZE; ++i) {
out_bound[i] = in_img_x[i] < 0.0f || in_img_x[i] > float (prop.in_img_width * UNIT_SIZE - 1u) ||
in_img_y[i] < 0.0f || in_img_y[i] > float (prop.in_img_height - 1u);
}
if (all (out_bound)) {
out_data = 0u;
return;
}
x00 = uvec4 (in_img_x);
y00 = uvec4 (in_img_y);
x01 = x00 + 1u;
y01 = y00;
x10 = x00;
y10 = y00 + 1u;
x11 = x01;
y11 = y10;
fract_x = fract (in_img_x);
fract_y = fract (in_img_y);
weight00 = (1.0f - fract_x) * (1.0f - fract_y);
weight01 = fract_x * (1.0f - fract_y);
weight10 = (1.0f - fract_x) * fract_y;
weight11 = fract_x * fract_y;
uvec4 x00_floor = x00 / UNIT_SIZE;
uvec4 x01_floor = x01 / UNIT_SIZE;
uvec4 x10_floor = x10 / UNIT_SIZE;
uvec4 x11_floor = x11 / UNIT_SIZE;
uvec4 x00_fract = x00 % UNIT_SIZE;
uvec4 x01_fract = x01 % UNIT_SIZE;
uvec4 x10_fract = x10 % UNIT_SIZE;
uvec4 x11_fract = x11 % UNIT_SIZE;
index00 = y00 * prop.in_img_width + x00_floor;
index01 = y01 * prop.in_img_width + x01_floor;
index10 = y10 * prop.in_img_width + x10_floor;
index11 = y11 * prop.in_img_width + x11_floor;
// pixel Y-value
vec4 out_y00, out_y01, out_y10, out_y11;
unpack_unorm_y (0);
unpack_unorm_y (1);
unpack_unorm_y (2);
unpack_unorm_y (3);
vec4 inter_y = out_y00 * weight00 + out_y01 * weight01 + out_y10 * weight10 + out_y11 * weight11;
out_data = packUnorm4x8 (inter_y * vec4 (not (out_bound)));
}
void geomap_uv (vec2 in_uv_x, vec2 in_uv_y, bvec4 out_bound_uv, out uint out_data)
{
uvec2 x00 = uvec2 (in_uv_x);
uvec2 y00 = uvec2 (in_uv_y);
uvec2 x01 = x00 + 1u;
uvec2 y01 = y00;
uvec2 x10 = x00;
uvec2 y10 = y00 + 1u;
uvec2 x11 = x01;
uvec2 y11 = y10;
vec2 fract_x = fract (in_uv_x);
vec2 fract_y = fract (in_uv_y);
vec2 weight00 = (1.0f - fract_x) * (1.0f - fract_y);
vec2 weight01 = fract_x * (1.0f - fract_y);
vec2 weight10 = (1.0f - fract_x) * fract_y;
vec2 weight11 = fract_x * fract_y;
uvec2 x00_floor = x00 / UNIT_SIZE;
uvec2 x01_floor = x01 / UNIT_SIZE;
uvec2 x10_floor = x10 / UNIT_SIZE;
uvec2 x11_floor = x11 / UNIT_SIZE;
uvec2 x00_fract = (x00 % UNIT_SIZE) / 2u;
uvec2 x01_fract = (x01 % UNIT_SIZE) / 2u;
uvec2 x10_fract = (x10 % UNIT_SIZE) / 2u;
uvec2 x11_fract = (x11 % UNIT_SIZE) / 2u;
uvec2 index00 = y00 * prop.in_img_width + x00_floor;
uvec2 index01 = y01 * prop.in_img_width + x01_floor;
uvec2 index10 = y10 * prop.in_img_width + x10_floor;
uvec2 index11 = y11 * prop.in_img_width + x11_floor;
// pixel UV-value
vec4 out_uv00, out_uv01, out_uv10, out_uv11;
vec4 value = unpackUnorm4x8 (in_buf_uv.data[index00.x]);
out_uv00.xy = x00_fract.x == 0u ? value.xy : value.zw;
value = unpackUnorm4x8 (in_buf_uv.data[index01.x]);
out_uv01.xy = x01_fract.x == 0u ? value.xy : value.zw;
value = unpackUnorm4x8 (in_buf_uv.data[index10.x]);
out_uv10.xy = x10_fract.x == 0u ? value.xy : value.zw;
value = unpackUnorm4x8 (in_buf_uv.data[index11.x]);
out_uv11.xy = x11_fract.x == 0u ? value.xy : value.zw;
value = unpackUnorm4x8 (in_buf_uv.data[index00.y]);
out_uv00.zw = x00_fract.y == 0u ? value.xy : value.zw;
value = unpackUnorm4x8 (in_buf_uv.data[index01.y]);
out_uv01.zw = x01_fract.y == 0u ? value.xy : value.zw;
value = unpackUnorm4x8 (in_buf_uv.data[index10.y]);
out_uv10.zw = x10_fract.y == 0u ? value.xy : value.zw;
value = unpackUnorm4x8 (in_buf_uv.data[index11.y]);
out_uv11.zw = x11_fract.y == 0u ? value.xy : value.zw;
vec4 inter_uv = out_uv00 * weight00.xxyy + out_uv01 * weight01.xxyy +
out_uv10 * weight10.xxyy + out_uv11 * weight11.xxyy;
inter_uv = inter_uv * vec4 (not (out_bound_uv)) + vec4 (out_bound_uv) * 0.5f;
out_data = packUnorm4x8 (inter_uv);
}
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