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Cleanup: Remove unused Grease Pencil shader file

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This file was completely unused and caused confusion.

Pull Request: https://projects.blender.org/blender/blender/pulls/130982
This commit is contained in:
Falk David
2024-11-26 17:09:42 +01:00
committed by Falk David
parent 7dc630069b
commit ed1c262bb3
2 changed files with 0 additions and 404 deletions
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1
source/blender/draw/CMakeLists.txt
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@@ -572,7 +572,6 @@ set(GLSL_SRC
intern/shaders/common_fullscreen_vert.glsl
intern/shaders/common_fxaa_lib.glsl
intern/shaders/common_gpencil_lib.glsl
intern/shaders/common_grease_pencil_lib.glsl
intern/shaders/common_hair_lib.glsl
intern/shaders/common_hair_refine_comp.glsl
intern/shaders/common_intersect_lib.glsl

403
source/blender/draw/intern/shaders/common_grease_pencil_lib.glsl
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@@ -1,403 +0,0 @@
/* SPDX-FileCopyrightText: 2022-2023 Blender Authors
*
* SPDX-License-Identifier: GPL-2.0-or-later */
#pragma once
#include "common_math_lib.glsl"
#include "common_view_lib.glsl"
#ifndef DRW_GPENCIL_INFO
# error Missing additional info draw_gpencil
#endif
#ifdef GPU_FRAGMENT_SHADER
float gpencil_stroke_round_cap_mask(vec2 p1, vec2 p2, vec2 aspect, float thickness, float hardfac)
{
/* We create our own uv space to avoid issues with triangulation and linear
* interpolation artifacts. */
vec2 line = p2.xy - p1.xy;
vec2 pos = gl_FragCoord.xy - p1.xy;
float line_len = length(line);
float half_line_len = line_len * 0.5;
/* Normalize */
line = (line_len > 0.0) ? (line / line_len) : vec2(1.0, 0.0);
/* Create a uv space that englobe the whole segment into a capsule. */
vec2 uv_end;
uv_end.x = max(abs(dot(line, pos) - half_line_len) - half_line_len, 0.0);
uv_end.y = dot(vec2(-line.y, line.x), pos);
/* Divide by stroke radius. */
uv_end /= thickness;
uv_end *= aspect;
float dist = clamp(1.0 - length(uv_end) * 2.0, 0.0, 1.0);
if (hardfac > 0.999) {
return step(1e-8, dist);
}
else {
/* Modulate the falloff profile */
float hardness = 1.0 - hardfac;
dist = pow(dist, mix(0.01, 10.0, hardness));
return smoothstep(0.0, 1.0, dist);
}
}
#endif
vec2 gpencil_decode_aspect(int packed_data)
{
float asp = float(uint(packed_data) & 0x1FFu) * (1.0 / 255.0);
return (asp > 1.0) ? vec2(1.0, (asp - 1.0)) : vec2(asp, 1.0);
}
float gpencil_decode_uvrot(int packed_data)
{
uint udata = uint(packed_data);
float uvrot = 1e-8 + float((udata & 0x1FE00u) >> 9u) * (1.0 / 255.0);
return ((udata & 0x20000u) != 0u) ? -uvrot : uvrot;
}
float gpencil_decode_hardness(int packed_data)
{
return float((uint(packed_data) & 0x3FC0000u) >> 18u) * (1.0 / 255.0);
}
vec2 gpencil_project_to_screenspace(vec4 v, vec4 viewport_size)
{
return ((v.xy / v.w) * 0.5 + 0.5) * viewport_size.xy;
}
float gpencil_stroke_thickness_modulate(float thickness, vec4 ndc_pos, vec4 viewport_size)
{
/* World space point size. */
thickness *= gpThicknessScale * ProjectionMatrix[1][1] * viewport_size.y;
return thickness;
}
float gpencil_clamp_small_stroke_thickness(float thickness, vec4 ndc_pos)
{
/* To avoid aliasing artifacts, we clamp the line thickness and
* reduce its opacity in the fragment shader. */
float min_thickness = ndc_pos.w * 0.00065;
thickness = max(min_thickness, thickness);
return thickness;
}
#ifdef GPU_VERTEX_SHADER
int gpencil_stroke_point_id()
{
return (gl_VertexID & ~GP_IS_STROKE_VERTEX_BIT) >> GP_VERTEX_ID_SHIFT;
}
bool gpencil_is_stroke_vertex()
{
return flag_test(gl_VertexID, GP_IS_STROKE_VERTEX_BIT);
}
/**
* Returns value of gl_Position.
*
* To declare in vertex shader.
* in ivec4 ma, ma1, ma2, ma3;
* in vec4 pos, pos1, pos2, pos3, uv1, uv2, col1, col2, fcol1;
*
* All of these attributes are quad loaded the same way
* as GL_LINES_ADJACENCY would feed a geometry shader:
* - ma reference the previous adjacency point.
* - ma1 reference the current line first point.
* - ma2 reference the current line second point.
* - ma3 reference the next adjacency point.
* Note that we are rendering quad instances and not using any index buffer
*(except for fills).
*
* Material : x is material index, y is stroke_id, z is point_id,
* w is aspect & rotation & hardness packed.
* Position : contains thickness in 4th component.
* UV : xy is UV for fills, z is U of stroke, w is strength.
*
*
* WARNING: Max attribute count is actually 14 because OSX OpenGL implementation
* considers gl_VertexID and gl_InstanceID as vertex attribute. (see #74536)
*/
vec4 gpencil_vertex(vec4 viewport_size,
gpMaterialFlag material_flags,
vec2 alignment_rot,
/* World Position. */
out vec3 out_P,
/* World Normal. */
out vec3 out_N,
/* Vertex Color. */
out vec4 out_color,
/* Stroke Strength. */
out float out_strength,
/* UV coordinates. */
out vec2 out_uv,
/* Screen-Space segment endpoints. */
out vec4 out_sspos,
/* Stroke aspect ratio. */
out vec2 out_aspect,
/* Stroke thickness (x: clamped, y: unclamped). */
out vec2 out_thickness,
/* Stroke hardness. */
out float out_hardness)
{
int stroke_point_id = (gl_VertexID & ~GP_IS_STROKE_VERTEX_BIT) >> GP_VERTEX_ID_SHIFT;
/* Attribute Loading. */
vec4 pos = texelFetch(gp_pos_tx, (stroke_point_id - 1) * 3 + 0);
vec4 pos1 = texelFetch(gp_pos_tx, (stroke_point_id + 0) * 3 + 0);
vec4 pos2 = texelFetch(gp_pos_tx, (stroke_point_id + 1) * 3 + 0);
vec4 pos3 = texelFetch(gp_pos_tx, (stroke_point_id + 2) * 3 + 0);
ivec4 ma = floatBitsToInt(texelFetch(gp_pos_tx, (stroke_point_id - 1) * 3 + 1));
ivec4 ma1 = floatBitsToInt(texelFetch(gp_pos_tx, (stroke_point_id + 0) * 3 + 1));
ivec4 ma2 = floatBitsToInt(texelFetch(gp_pos_tx, (stroke_point_id + 1) * 3 + 1));
ivec4 ma3 = floatBitsToInt(texelFetch(gp_pos_tx, (stroke_point_id + 2) * 3 + 1));
vec4 uv1 = texelFetch(gp_pos_tx, (stroke_point_id + 0) * 3 + 2);
vec4 uv2 = texelFetch(gp_pos_tx, (stroke_point_id + 1) * 3 + 2);
vec4 col1 = texelFetch(gp_col_tx, (stroke_point_id + 0) * 2 + 0);
vec4 col2 = texelFetch(gp_col_tx, (stroke_point_id + 1) * 2 + 0);
vec4 fcol1 = texelFetch(gp_col_tx, (stroke_point_id + 0) * 2 + 1);
# define thickness1 pos1.w
# define thickness2 pos2.w
# define strength1 uv1.w
# define strength2 uv2.w
/* Packed! need to be decoded. */
# define hardness1 ma1.w
# define hardness2 ma2.w
# define uvrot1 ma1.w
# define aspect1 ma1.w
vec4 out_ndc;
if (gpencil_is_stroke_vertex()) {
bool show_stroke = flag_test(material_flags, GP_SHOW_STROKE);
if (!show_stroke) {
/* We set the vertex at the camera origin to generate 0 fragments. */
out_ndc = vec4(0.0, 0.0, -3e36, 0.0);
return out_ndc;
}
bool is_dot = flag_test(material_flags, GP_STROKE_ALIGNMENT);
bool is_squares = !flag_test(material_flags, GP_STROKE_DOTS);
/* Special Case. Stroke with single vert are rendered as dots. Do not discard them. */
if (!is_dot && ma.x == -1 && ma2.x == -1) {
is_dot = true;
is_squares = false;
}
/* Endpoints, we discard the vertices. */
if (!is_dot && ma2.x == -1) {
/* We set the vertex at the camera origin to generate 0 fragments. */
out_ndc = vec4(0.0, 0.0, -3e36, 0.0);
return out_ndc;
}
/* Avoid using a vertex attribute for quad positioning. */
float x = float(gl_VertexID & 1) * 2.0 - 1.0; /* [-1..1] */
float y = float(gl_VertexID & 2) - 1.0; /* [-1..1] */
bool use_curr = is_dot || (x == -1.0);
vec3 wpos_adj = transform_point(ModelMatrix, (use_curr) ? pos.xyz : pos3.xyz);
vec3 wpos1 = transform_point(ModelMatrix, pos1.xyz);
vec3 wpos2 = transform_point(ModelMatrix, pos2.xyz);
vec3 T;
if (is_dot) {
/* Shade as facing billboards. */
T = ViewMatrixInverse[0].xyz;
}
else if (use_curr && ma.x != -1) {
T = wpos1 - wpos_adj;
}
else {
T = wpos2 - wpos1;
}
T = safe_normalize(T);
vec3 B = cross(T, ViewMatrixInverse[2].xyz);
out_N = normalize(cross(B, T));
vec4 ndc_adj = point_world_to_ndc(wpos_adj);
vec4 ndc1 = point_world_to_ndc(wpos1);
vec4 ndc2 = point_world_to_ndc(wpos2);
out_ndc = (use_curr) ? ndc1 : ndc2;
out_P = (use_curr) ? wpos1 : wpos2;
out_strength = abs((use_curr) ? strength1 : strength2);
vec2 ss_adj = gpencil_project_to_screenspace(ndc_adj, viewport_size);
vec2 ss1 = gpencil_project_to_screenspace(ndc1, viewport_size);
vec2 ss2 = gpencil_project_to_screenspace(ndc2, viewport_size);
/* Screen-space Lines tangents. */
float line_len;
vec2 line = safe_normalize_len(ss2 - ss1, line_len);
vec2 line_adj = safe_normalize((use_curr) ? (ss1 - ss_adj) : (ss_adj - ss2));
float thickness = abs((use_curr) ? thickness1 : thickness2);
thickness = gpencil_stroke_thickness_modulate(thickness, out_ndc, viewport_size);
float clamped_thickness = gpencil_clamp_small_stroke_thickness(thickness, out_ndc);
out_uv = vec2(x, y) * 0.5 + 0.5;
out_hardness = gpencil_decode_hardness(use_curr ? hardness1 : hardness2);
if (is_dot) {
uint alignment_mode = material_flags & GP_STROKE_ALIGNMENT;
/* For one point strokes use object alignment. */
if (alignment_mode == GP_STROKE_ALIGNMENT_STROKE && ma.x == -1 && ma2.x == -1) {
alignment_mode = GP_STROKE_ALIGNMENT_OBJECT;
}
vec2 x_axis;
if (alignment_mode == GP_STROKE_ALIGNMENT_STROKE) {
x_axis = (ma2.x == -1) ? line_adj : line;
}
else if (alignment_mode == GP_STROKE_ALIGNMENT_FIXED) {
/* Default for no-material drawing. */
x_axis = vec2(1.0, 0.0);
}
else { /* GP_STROKE_ALIGNMENT_OBJECT */
vec4 ndc_x = point_world_to_ndc(wpos1 + ModelMatrix[0].xyz);
vec2 ss_x = gpencil_project_to_screenspace(ndc_x, viewport_size);
x_axis = safe_normalize(ss_x - ss1);
}
/* Rotation: Encoded as Cos + Sin sign. */
float uv_rot = gpencil_decode_uvrot(uvrot1);
float rot_sin = sqrt(max(0.0, 1.0 - uv_rot * uv_rot)) * sign(uv_rot);
float rot_cos = abs(uv_rot);
/* TODO(@fclem): Optimize these 2 matrix multiply into one by only having one rotation angle
* and using a cosine approximation. */
x_axis = mat2(rot_cos, -rot_sin, rot_sin, rot_cos) * x_axis;
x_axis = mat2(alignment_rot.x, -alignment_rot.y, alignment_rot.y, alignment_rot.x) * x_axis;
/* Rotate 90 degrees counter-clockwise. */
vec2 y_axis = vec2(-x_axis.y, x_axis.x);
out_aspect = gpencil_decode_aspect(aspect1);
x *= out_aspect.x;
y *= out_aspect.y;
/* Invert for vertex shader. */
out_aspect = 1.0 / out_aspect;
out_ndc.xy += (x * x_axis + y * y_axis) * viewport_size.zw * clamped_thickness;
out_sspos.xy = ss1;
out_sspos.zw = ss1 + x_axis * 0.5;
out_thickness.x = (is_squares) ? 1e18 : (clamped_thickness / out_ndc.w);
out_thickness.y = (is_squares) ? 1e18 : (thickness / out_ndc.w);
}
else {
bool is_stroke_start = (ma.x == -1 && x == -1);
bool is_stroke_end = (ma3.x == -1 && x == 1);
/* Mitter tangent vector. */
vec2 miter_tan = safe_normalize(line_adj + line);
float miter_dot = dot(miter_tan, line_adj);
/* Break corners after a certain angle to avoid really thick corners. */
const float miter_limit = 0.5; /* cos(60 degrees) */
bool miter_break = (miter_dot < miter_limit);
miter_tan = (miter_break || is_stroke_start || is_stroke_end) ? line :
(miter_tan / miter_dot);
/* Rotate 90 degrees counter-clockwise. */
vec2 miter = vec2(-miter_tan.y, miter_tan.x);
out_sspos.xy = ss1;
out_sspos.zw = ss2;
out_thickness.x = clamped_thickness / out_ndc.w;
out_thickness.y = thickness / out_ndc.w;
out_aspect = vec2(1.0);
vec2 screen_ofs = miter * y;
/* Reminder: we packed the cap flag into the sign of strength and thickness sign. */
if ((is_stroke_start && strength1 > 0.0) || (is_stroke_end && thickness1 > 0.0) ||
(miter_break && !is_stroke_start && !is_stroke_end))
{
screen_ofs += line * x;
}
out_ndc.xy += screen_ofs * viewport_size.zw * clamped_thickness;
out_uv.x = (use_curr) ? uv1.z : uv2.z;
}
out_color = (use_curr) ? col1 : col2;
}
else {
/* Fill vertex. */
bool show_fill = flag_test(material_flags, GP_SHOW_FILL);
if (!show_fill) {
/* We set the vertex at the camera origin to generate 0 fragments. */
out_ndc = vec4(0.0, 0.0, -3e36, 0.0);
return out_ndc;
}
out_P = transform_point(ModelMatrix, pos1.xyz);
out_ndc = point_world_to_ndc(out_P);
out_uv = uv1.xy;
out_thickness.x = 1e18;
out_thickness.y = 1e20;
out_hardness = 1.0;
out_aspect = vec2(1.0);
out_sspos = vec4(0.0);
/* Flat normal following camera and object bounds. */
vec3 V = cameraVec(ModelMatrix[3].xyz);
vec3 N = normal_world_to_object(V);
N *= OrcoTexCoFactors[1].xyz;
N = normal_object_to_world(N);
out_N = safe_normalize(N);
/* Decode fill opacity. */
out_color = vec4(fcol1.rgb, floor(fcol1.a / 10.0) / 10000.0);
/* We still offset the fills a little to avoid overlaps */
out_ndc.z += 0.000002;
}
# undef thickness1
# undef thickness2
# undef strength1
# undef strength2
# undef hardness1
# undef hardness2
# undef uvrot1
# undef aspect1
return out_ndc;
}
vec4 gpencil_vertex(vec4 viewport_size,
out vec3 out_P,
out vec3 out_N,
out vec4 out_color,
out float out_strength,
out vec2 out_uv,
out vec4 out_sspos,
out vec2 out_aspect,
out vec2 out_thickness,
out float out_hardness)
{
return gpencil_vertex(viewport_size,
gpMaterialFlag(0u),
vec2(1.0, 0.0),
out_P,
out_N,
out_color,
out_strength,
out_uv,
out_sspos,
out_aspect,
out_thickness,
out_hardness);
}
#endif