Skia shader compilation error in Linux

[shenzhui007]

What happened?

I was able to open the interface successfully in the past few months. However, when I ran the command "./notesnook_linux_x86_64.AppImage" one day, I noticed that the interface failed to render. I pressed CTRL+SHIFT+I and took a screenshot. I also tried older versions, but they all failed.

The solution is to delete the folder "/home/$user/.config/Notesnoke" and then log in again. Everything goes well after that.

I hope this can be helpful.

Steps to reproduce the problem

My OS is Kali Linux which is a Debian-based system.
run ./notesnook_linux_x86_64.AppImage

Version

v2.6.12

Platform/OS

Linux

Relevant log output

App ready. Opening window.
https protocol inteception "successful"
[51101:1205/070051.798010:ERROR:object_proxy.cc(590)] Failed to call method: org.freedesktop.portal.Settings.Read: object_path= /org/freedesktop/portal/desktop: org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.freedesktop.portal.Settings” on object at path /org/freedesktop/portal/desktop
Intercepting request: https://app.notesnook.com/
Intercepting request: https://app.notesnook.com/assets/index-df75c6aa.js
Intercepting request: https://app.notesnook.com/assets/index-0f3945e349bb.css
[51133:1205/070052.237361:ERROR:shared_context_state.cc(81)] Skia shader compilation error
------------------------
// Vertex SKSL
#extension GL_NV_shader_noperspective_interpolation: require
const float PRECISION = 4.000000;
const float MAX_FIXED_RESOLVE_LEVEL = 5.000000;
const float MAX_FIXED_SEGMENTS = 32.000000;
uniform float4 sk_RTAdjust;uniform float4 uaffineMatrix_S0;uniform float2 utranslate_S0;in float2 resolveLevel_and_idx;in float4 p01;in float4 p23;in float2 fanPointAttrib;float wangs_formula_max_fdiff_p2(float2 p0, float2 p1, float2 p2, float2 p3,float2x2 matrix) {float2 d0 = matrix * (fma(float2(-2), p1, p2) + p0);float2 d1 = matrix * (fma(float2(-2), p2, p3) + p1);return max(dot(d0,d0), dot(d1,d1));}float wangs_formula_cubic(float _precision_, float2 p0, float2 p1, float2 p2, float2 p3,float2x2 matrix) {float m = wangs_formula_max_fdiff_p2(p0, p1, p2, p3, matrix);return max(ceil(sqrt(0.75 * _precision_ * sqrt(m))), 1.0);}float wangs_formula_cubic_log2(float _precision_, float2 p0, float2 p1, float2 p2, float2 p3,float2x2 matrix) {float m = wangs_formula_max_fdiff_p2(p0, p1, p2, p3, matrix);return ceil(log2(max(0.5625 * _precision_ * _precision_ * m, 1.0)) * .25);}float wangs_formula_conic_p2(float _precision_, float2 p0, float2 p1, float2 p2, float w) {float2 C = (min(min(p0, p1), p2) + max(max(p0, p1), p2)) * 0.5;p0 -= C;p1 -= C;p2 -= C;float m = sqrt(max(max(dot(p0,p0), dot(p1,p1)), dot(p2,p2)));float2 dp = fma(float2(-2.0 * w), p1, p0) + p2;float dw = abs(fma(-2.0, w, 2.0));float rp_minus_1 = max(0.0, fma(m, _precision_, -1.0));float numer = length(dp) * _precision_ + rp_minus_1 * dw;float denom = 4 * min(w, 1.0);return numer/denom;}float wangs_formula_conic(float _precision_, float2 p0, float2 p1, float2 p2, float w) {float n2 = wangs_formula_conic_p2(_precision_, p0, p1, p2, w);return max(ceil(sqrt(n2)), 1.0);}float wangs_formula_conic_log2(float _precision_, float2 p0, float2 p1, float2 p2, float w) {float n2 = wangs_formula_conic_p2(_precision_, p0, p1, p2, w);return ceil(log2(max(n2, 1.0)) * .5);}bool is_conic_curve() { return isinf(p23.w); }bool is_triangular_conic_curve() { return isinf(p23.z); }float ldexp_portable(float x, float p) {return x * exp2(p);}void main() {// Primitive Processor tessellate_MiddleOutShader
float2x2 AFFINE_MATRIX = float2x2(uaffineMatrix_S0.xy, uaffineMatrix_S0.zw);float2 TRANSLATE = utranslate_S0;float resolveLevel = resolveLevel_and_idx.x;float idxInResolveLevel = resolveLevel_and_idx.y;float2 localcoord;if (resolveLevel < 0) {localcoord = fanPointAttrib;} else if (is_triangular_conic_curve()) {localcoord = (resolveLevel != 0) ? p01.zw: (idxInResolveLevel != 0) ? p23.xy: p01.xy;} else {float2 p0=p01.xy, p1=p01.zw, p2=p23.xy, p3=p23.zw;float w = -1;float maxResolveLevel;if (is_conic_curve()) {w = p3.x;maxResolveLevel = wangs_formula_conic_log2(PRECISION, AFFINE_MATRIX * p0,AFFINE_MATRIX * p1,AFFINE_MATRIX * p2, w);p1 *= w;p3 = p2;} else {maxResolveLevel = wangs_formula_cubic_log2(PRECISION, p0, p1, p2, p3,AFFINE_MATRIX);}if (resolveLevel > maxResolveLevel) {idxInResolveLevel = floor(ldexp_portable(idxInResolveLevel,maxResolveLevel - resolveLevel));resolveLevel = maxResolveLevel;}float fixedVertexID = floor(.5 + ldexp_portable(idxInResolveLevel, MAX_FIXED_RESOLVE_LEVEL - resolveLevel));if (0 < fixedVertexID && fixedVertexID < MAX_FIXED_SEGMENTS) {float T = fixedVertexID * (1 / MAX_FIXED_SEGMENTS);float2 ab = mix(p0, p1, T);float2 bc = mix(p1, p2, T);float2 cd = mix(p2, p3, T);float2 abc = mix(ab, bc, T);float2 bcd = mix(bc, cd, T);float2 abcd = mix(abc, bcd, T);float u = mix(1.0, w, T);float v = w + 1 - u;float uv = mix(u, v, T);localcoord = (w < 0) ?abcd:abc/uv;} else {localcoord = (fixedVertexID == 0) ? p0.xy : p3.xy;}}float2 vertexpos = AFFINE_MATRIX * localcoord + TRANSLATE;sk_Position = vertexpos.xy01;}
// Fragment SKSL
#extension GL_NV_shader_noperspective_interpolation: require
uniform half4 ucolor_S0;void main() {// Stage 0, tessellate_MiddleOutShader
half4 outputColor_S0 = ucolor_S0;const half4 outputCoverage_S0 = half4(1);{ // Xfer Processor: Disable Color
}}
// Vertex GLSL
#version 300 es

#extension GL_NV_shader_noperspective_interpolation : require
precision mediump float;
precision mediump sampler2D;
const highp float PRECISION = 4.0;
const highp float MAX_FIXED_RESOLVE_LEVEL = 5.0;
const highp float MAX_FIXED_SEGMENTS = 32.0;
uniform highp vec4 sk_RTAdjust;
uniform highp vec4 uaffineMatrix_S0;
uniform highp vec2 utranslate_S0;
in highp vec2 resolveLevel_and_idx;
in highp vec4 p01;
in highp vec4 p23;
in highp vec2 fanPointAttrib;
highp float wangs_formula_max_fdiff_p2_ff2f2f2f2f22(highp vec2 p0, highp vec2 p1, highp vec2 p2, highp vec2 p3, highp mat2 matrix) {
    highp vec2 d0 = matrix * (((vec2(-2.0)) * (p1) + (p2)) + p0);
    highp vec2 d1 = matrix * (((vec2(-2.0)) * (p2) + (p3)) + p1);
    return max(dot(d0, d0), dot(d1, d1));
}
highp float wangs_formula_conic_p2_fff2f2f2f(highp float _precision_, highp vec2 p0, highp vec2 p1, highp vec2 p2, highp float w) {
    highp vec2 C = (min(min(p0, p1), p2) + max(max(p0, p1), p2)) * 0.5;
    p0 -= C;
    p1 -= C;
    p2 -= C;
    highp float m = sqrt(max(max(dot(p0, p0), dot(p1, p1)), dot(p2, p2)));
    highp vec2 dp = ((vec2(-2.0 * w)) * (p1) + (p0)) + p2;
    highp float dw = abs(((-2.0) * (w) + (2.0)));
    highp float rp_minus_1 = max(0.0, ((m) * (_precision_) + (-1.0)));
    highp float numer = length(dp) * _precision_ + rp_minus_1 * dw;
    highp float denom = 4.0 * min(w, 1.0);
    return numer / denom;
}
void main() {
    highp mat2 AFFINE_MATRIX = mat2(uaffineMatrix_S0.xy, uaffineMatrix_S0.zw);
    highp vec2 TRANSLATE = utranslate_S0;
    highp float resolveLevel = resolveLevel_and_idx.x;
    highp float idxInResolveLevel = resolveLevel_and_idx.y;
    highp vec2 localcoord;
    if (resolveLevel < 0.0) {
        localcoord = fanPointAttrib;
    } else {
        if (isinf(p23.z)) {
            localcoord = resolveLevel != 0.0 ? p01.zw : (idxInResolveLevel != 0.0 ? p23.xy : p01.xy);
        } else {
            highp vec2 p0 = p01.xy;
            highp vec2 p1 = p01.zw;
            highp vec2 p2 = p23.xy;
            highp vec2 p3 = p23.zw;
            highp float w = -1.0;
            highp float maxResolveLevel;
            if (isinf(p23.w)) {
                w = p3.x;
                highp float _0_n2 = wangs_formula_conic_p2_fff2f2f2f(PRECISION, AFFINE_MATRIX * p0, AFFINE_MATRIX * p1, AFFINE_MATRIX * p2, w);
                maxResolveLevel = ceil(log2(max(_0_n2, 1.0)) * 0.5);
                p1 *= w;
                p3 = p2;
            } else {
                highp float _1_m = wangs_formula_max_fdiff_p2_ff2f2f2f2f22(p0, p1, p2, p3, AFFINE_MATRIX);
                maxResolveLevel = ceil(log2(max(9.0 * _1_m, 1.0)) * 0.25);
            }
            if (resolveLevel > maxResolveLevel) {
                idxInResolveLevel = floor(idxInResolveLevel * exp2(maxResolveLevel - resolveLevel));
                resolveLevel = maxResolveLevel;
            }
            highp float fixedVertexID = floor(0.5 + idxInResolveLevel * exp2(MAX_FIXED_RESOLVE_LEVEL - resolveLevel));
            if (0.0 < fixedVertexID && fixedVertexID < MAX_FIXED_SEGMENTS) {
                highp float T = fixedVertexID * 0.03125;
                highp vec2 ab = mix(p0, p1, T);
                highp vec2 bc = mix(p1, p2, T);
                highp vec2 cd = mix(p2, p3, T);
                highp vec2 abc = mix(ab, bc, T);
                highp vec2 bcd = mix(bc, cd, T);
                highp vec2 abcd = mix(abc, bcd, T);
                highp float u = mix(1.0, w, T);
                highp float v = (w + 1.0) - u;
                highp float uv = mix(u, v, T);
                localcoord = w < 0.0 ? abcd : abc / uv;
            } else {
                localcoord = fixedVertexID == 0.0 ? p0 : p3;
            }
        }
    }
    highp vec2 vertexpos = AFFINE_MATRIX * localcoord + TRANSLATE;
    gl_Position = vec4(vertexpos, 0.0, 1.0);
    gl_Position = vec4(gl_Position.xy * sk_RTAdjust.xz + gl_Position.ww * sk_RTAdjust.yw, 0.0, gl_Position.w);
}

// Fragment GLSL
#version 300 es

#extension GL_NV_shader_noperspective_interpolation : require
precision mediump float;
precision mediump sampler2D;
uniform mediump vec4 ucolor_S0;
void main() {
}


Errors:
link failed but did not provide an info log
[51133:1205/070052.238041:ERROR:shared_context_state.cc(81)] Skia shader compilation error

[thecodrr]

@shenzhui007 thank you for the detailed bug report. Are you running Wayland?

[shenzhui007]

@thecodrr No, I'm using Xorg.

[thecodrr]

Found this exact issue (and a more "sane" workaround) here: ferdium/ferdium-app#1265

In Notesnook's case, the deletion command would be:

rm -rf ~/.config/Notesnook/GPUCache