diff --git a/src/renderer/wg_engine/tvgWgShaderSrc.cpp b/src/renderer/wg_engine/tvgWgShaderSrc.cpp
index c3e423a6..2f10b5e3 100644
--- a/src/renderer/wg_engine/tvgWgShaderSrc.cpp
+++ b/src/renderer/wg_engine/tvgWgShaderSrc.cpp
@@ -335,379 +335,6 @@ fn fs_main(in: VertexOutput) -> @location(0) vec4f {
 };
 )";
 
-//************************************************************************
-// cShaderSource_PipelineBlit
-//************************************************************************
-
-const char* cShaderSource_PipelineBlit = R"(
-// vertex input
-struct VertexInput {
-    @location(0) position: vec2f,
-    @location(1) texCoord: vec2f
-};
-
-// vertex output
-struct VertexOutput {
-    @builtin(position) position: vec4f,
-    @location(0) texCoord: vec2f
-};
-
-@group(0) @binding(0) var uSamplerSrc       : sampler;
-@group(0) @binding(1) var uTextureViewSrc   : texture_2d<f32>;
-@group(1) @binding(0) var<uniform> uOpacity : f32;
-
-@vertex
-fn vs_main(in: VertexInput) -> VertexOutput {
-    // fill output
-    var out: VertexOutput;
-    out.position = vec4f(in.position.xy, 0.0, 1.0);
-    out.texCoord = in.texCoord;
-    return out;
-}
-
-@fragment
-fn fs_main(in: VertexOutput) -> @location(0) vec4f {
-    let color: vec4f = textureSample(uTextureViewSrc, uSamplerSrc, in.texCoord.xy);
-    return vec4f(color.rgb, uOpacity);
-    //return vec4f(color.rgb, 0.5);
-};
-)";
-
-//************************************************************************
-// cShaderSource_PipelineBlitColor
-//************************************************************************
-
-const char* cShaderSource_PipelineBlitColor = R"(
-// vertex input
-struct VertexInput {
-    @location(0) position: vec2f,
-    @location(1) texCoord: vec2f
-};
-
-// vertex output
-struct VertexOutput {
-    @builtin(position) position: vec4f,
-    @location(0) texCoord: vec2f
-};
-
-@group(0) @binding(0) var uSamplerSrc     : sampler;
-@group(0) @binding(1) var uTextureViewSrc : texture_2d<f32>;
-
-@vertex
-fn vs_main(in: VertexInput) -> VertexOutput {
-    // fill output
-    var out: VertexOutput;
-    out.position = vec4f(in.position.xy, 0.0, 1.0);
-    out.texCoord = in.texCoord;
-    return out;
-}
-
-@fragment
-fn fs_main(in: VertexOutput) -> @location(0) vec4f {
-    let color: vec4f = textureSample(uTextureViewSrc, uSamplerSrc, in.texCoord.xy);
-    return vec4f(color.rgb, 1.0);
-};
-)";
-
-//************************************************************************
-// cShaderSource_PipelineCompAlphaMask
-//************************************************************************
-
-const char* cShaderSource_PipelineCompAlphaMask = R"(
-// vertex input
-struct VertexInput {
-    @location(0) position: vec2f,
-    @location(1) texCoord: vec2f
-};
-
-// vertex output
-struct VertexOutput {
-    @builtin(position) position: vec4f,
-    @location(0) texCoord: vec2f
-};
-
-@group(0) @binding(0) var uSamplerSrc     : sampler;
-@group(0) @binding(1) var uTextureViewSrc : texture_2d<f32>;
-@group(1) @binding(0) var uSamplerMsk     : sampler;
-@group(1) @binding(1) var uTextureViewMsk : texture_2d<f32>;
-
-@vertex
-fn vs_main(in: VertexInput) -> VertexOutput {
-    // fill output
-    var out: VertexOutput;
-    out.position = vec4f(in.position.xy, 0.0, 1.0);
-    out.texCoord = in.texCoord;
-    return out;
-}
-
-@fragment
-fn fs_main(in: VertexOutput) -> @location(0) vec4f {
-    let colorSrc: vec4f = textureSample(uTextureViewSrc, uSamplerSrc, in.texCoord.xy);
-    let colorMsk: vec4f = textureSample(uTextureViewMsk, uSamplerMsk, in.texCoord.xy);
-    return vec4f(colorSrc.rgb, colorSrc.a * colorMsk.a);
-};
-)";
-
-const char* cShaderSource_PipelineCompInvAlphaMask = R"(
-// vertex input
-struct VertexInput {
-    @location(0) position: vec2f,
-    @location(1) texCoord: vec2f
-};
-
-// vertex output
-struct VertexOutput {
-    @builtin(position) position: vec4f,
-    @location(0) texCoord: vec2f
-};
-
-@group(0) @binding(0) var uSamplerSrc     : sampler;
-@group(0) @binding(1) var uTextureViewSrc : texture_2d<f32>;
-@group(1) @binding(0) var uSamplerMsk     : sampler;
-@group(1) @binding(1) var uTextureViewMsk : texture_2d<f32>;
-
-@vertex
-fn vs_main(in: VertexInput) -> VertexOutput {
-    // fill output
-    var out: VertexOutput;
-    out.position = vec4f(in.position.xy, 0.0, 1.0);
-    out.texCoord = in.texCoord;
-    return out;
-}
-
-@fragment
-fn fs_main(in: VertexOutput) -> @location(0) vec4f {
-    let colorSrc: vec4f = textureSample(uTextureViewSrc, uSamplerSrc, in.texCoord.xy);
-    let colorMsk: vec4f = textureSample(uTextureViewMsk, uSamplerMsk, in.texCoord.xy);
-    return vec4f(colorSrc.rgb, colorSrc.a * (1.0 - colorMsk.a));
-};
-)";
-
-const char* cShaderSource_PipelineCompLumaMask = R"(
-// vertex input
-struct VertexInput {
-    @location(0) position: vec2f,
-    @location(1) texCoord: vec2f
-};
-
-// vertex output
-struct VertexOutput {
-    @builtin(position) position: vec4f,
-    @location(0) texCoord: vec2f
-};
-
-@group(0) @binding(0) var uSamplerSrc     : sampler;
-@group(0) @binding(1) var uTextureViewSrc : texture_2d<f32>;
-@group(1) @binding(0) var uSamplerMsk     : sampler;
-@group(1) @binding(1) var uTextureViewMsk : texture_2d<f32>;
-
-@vertex
-fn vs_main(in: VertexInput) -> VertexOutput {
-    // fill output
-    var out: VertexOutput;
-    out.position = vec4f(in.position.xy, 0.0, 1.0);
-    out.texCoord = in.texCoord;
-    return out;
-}
-
-@fragment
-fn fs_main(in: VertexOutput) -> @location(0) vec4f {
-    let colorSrc: vec4f = textureSample(uTextureViewSrc, uSamplerSrc, in.texCoord.xy);
-    let colorMsk: vec4f = textureSample(uTextureViewMsk, uSamplerMsk, in.texCoord.xy);
-    let luma: f32 = (0.299 * colorMsk.r + 0.587 * colorMsk.g + 0.114 * colorMsk.b);
-    return colorSrc * luma;
-};
-)";
-
-const char* cShaderSource_PipelineCompInvLumaMask = R"(
-// vertex input
-struct VertexInput {
-    @location(0) position: vec2f,
-    @location(1) texCoord: vec2f
-};
-
-// vertex output
-struct VertexOutput {
-    @builtin(position) position: vec4f,
-    @location(0) texCoord: vec2f
-};
-
-@group(0) @binding(0) var uSamplerSrc     : sampler;
-@group(0) @binding(1) var uTextureViewSrc : texture_2d<f32>;
-@group(1) @binding(0) var uSamplerMsk     : sampler;
-@group(1) @binding(1) var uTextureViewMsk : texture_2d<f32>;
-
-@vertex
-fn vs_main(in: VertexInput) -> VertexOutput {
-    // fill output
-    var out: VertexOutput;
-    out.position = vec4f(in.position.xy, 0.0, 1.0);
-    out.texCoord = in.texCoord;
-    return out;
-}
-
-@fragment
-fn fs_main(in: VertexOutput) -> @location(0) vec4f {
-    let colorSrc: vec4f = textureSample(uTextureViewSrc, uSamplerSrc, in.texCoord.xy);
-    let colorMsk: vec4f = textureSample(uTextureViewMsk, uSamplerMsk, in.texCoord.xy);
-    let luma: f32 = (0.299 * colorMsk.r + 0.587 * colorMsk.g + 0.114 * colorMsk.b);
-    return colorSrc * (1.0 - luma);
-};
-)";
-
-const char* cShaderSource_PipelineCompAddMask = R"(
-// vertex input
-struct VertexInput {
-    @location(0) position: vec2f,
-    @location(1) texCoord: vec2f
-};
-
-// vertex output
-struct VertexOutput {
-    @builtin(position) position: vec4f,
-    @location(0) texCoord: vec2f
-};
-
-@group(0) @binding(0) var uSamplerSrc     : sampler;
-@group(0) @binding(1) var uTextureViewSrc : texture_2d<f32>;
-@group(1) @binding(0) var uSamplerMsk     : sampler;
-@group(1) @binding(1) var uTextureViewMsk : texture_2d<f32>;
-
-@vertex
-fn vs_main(in: VertexInput) -> VertexOutput {
-    // fill output
-    var out: VertexOutput;
-    out.position = vec4f(in.position.xy, 0.0, 1.0);
-    out.texCoord = in.texCoord;
-    return out;
-}
-
-@fragment
-fn fs_main(in: VertexOutput) -> @location(0) vec4f {
-    let colorSrc: vec4f = textureSample(uTextureViewSrc, uSamplerSrc, in.texCoord.xy);
-    let colorMsk: vec4f = textureSample(uTextureViewMsk, uSamplerMsk, in.texCoord.xy);
-    let color: vec4f = colorSrc + colorMsk * (1.0 - colorSrc.a);
-    return min(color, vec4f(1.0));
-};
-)";
-
-const char* cShaderSource_PipelineCompSubtractMask = R"(
-// vertex input
-struct VertexInput {
-    @location(0) position: vec2f,
-    @location(1) texCoord: vec2f
-};
-
-// vertex output
-struct VertexOutput {
-    @builtin(position) position: vec4f,
-    @location(0) texCoord: vec2f
-};
-
-@group(0) @binding(0) var uSamplerSrc     : sampler;
-@group(0) @binding(1) var uTextureViewSrc : texture_2d<f32>;
-@group(1) @binding(0) var uSamplerMsk     : sampler;
-@group(1) @binding(1) var uTextureViewMsk : texture_2d<f32>;
-
-@vertex
-fn vs_main(in: VertexInput) -> VertexOutput {
-    // fill output
-    var out: VertexOutput;
-    out.position = vec4f(in.position.xy, 0.0, 1.0);
-    out.texCoord = in.texCoord;
-    return out;
-}
-
-@fragment
-fn fs_main(in: VertexOutput) -> @location(0) vec4f {
-    let colorSrc: vec4f = textureSample(uTextureViewSrc, uSamplerSrc, in.texCoord.xy);
-    let colorMsk: vec4f = textureSample(uTextureViewMsk, uSamplerMsk, in.texCoord.xy);
-
-    let a: f32 = colorSrc.a - colorMsk.a;
-    if (a <= 0.0) {
-        return vec4f(0.0, 0.0, 0.0, 0.0);
-    } else {
-        return vec4f(colorSrc.rgb, colorSrc.a * a);
-    }
-};
-)";
-
-const char* cShaderSource_PipelineCompIntersectMask = R"(
-// vertex input
-struct VertexInput {
-    @location(0) position: vec2f,
-    @location(1) texCoord: vec2f
-};
-
-// vertex output
-struct VertexOutput {
-    @builtin(position) position: vec4f,
-    @location(0) texCoord: vec2f
-};
-
-@group(0) @binding(0) var uSamplerSrc     : sampler;
-@group(0) @binding(1) var uTextureViewSrc : texture_2d<f32>;
-@group(1) @binding(0) var uSamplerMsk     : sampler;
-@group(1) @binding(1) var uTextureViewMsk : texture_2d<f32>;
-
-@vertex
-fn vs_main(in: VertexInput) -> VertexOutput {
-    // fill output
-    var out: VertexOutput;
-    out.position = vec4f(in.position.xy, 0.0, 1.0);
-    out.texCoord = in.texCoord;
-    return out;
-}
-
-@fragment
-fn fs_main(in: VertexOutput) -> @location(0) vec4f {
-    let colorSrc: vec4f = textureSample(uTextureViewSrc, uSamplerSrc, in.texCoord.xy);
-    let colorMsk: vec4f = textureSample(uTextureViewMsk, uSamplerMsk, in.texCoord.xy);
-    let intAlpha: f32 = colorSrc.a * colorMsk.a;
-    return vec4f(colorMsk.rgb, colorMsk.a * intAlpha);
-};
-)";
-
-const char* cShaderSource_PipelineCompDifferenceMask = R"(
-// vertex input
-struct VertexInput {
-    @location(0) position: vec2f,
-    @location(1) texCoord: vec2f
-};
-
-// vertex output
-struct VertexOutput {
-    @builtin(position) position: vec4f,
-    @location(0) texCoord: vec2f
-};
-
-@group(0) @binding(0) var uSamplerSrc     : sampler;
-@group(0) @binding(1) var uTextureViewSrc : texture_2d<f32>;
-@group(1) @binding(0) var uSamplerMsk     : sampler;
-@group(1) @binding(1) var uTextureViewMsk : texture_2d<f32>;
-
-@vertex
-fn vs_main(in: VertexInput) -> VertexOutput {
-    // fill output
-    var out: VertexOutput;
-    out.position = vec4f(in.position.xy, 0.0, 1.0);
-    out.texCoord = in.texCoord;
-    return out;
-}
-
-@fragment
-fn fs_main(in: VertexOutput) -> @location(0) vec4f {
-    let colorSrc: vec4f = textureSample(uTextureViewSrc, uSamplerSrc, in.texCoord.xy);
-    let colorMsk: vec4f = textureSample(uTextureViewMsk, uSamplerMsk, in.texCoord.xy);
-    let da: f32 = colorSrc.a - colorMsk.a;
-    if (da > 0.0) {
-        return vec4f(colorSrc.rgb, colorSrc.a * da);
-    } else {
-        return vec4f(colorMsk.rgb, colorMsk.a * (-da));
-    }
-};
-)";
-
 //************************************************************************
 // cShaderSource_PipelineComputeBlend
 //************************************************************************
diff --git a/src/renderer/wg_engine/tvgWgShaderSrc.h b/src/renderer/wg_engine/tvgWgShaderSrc.h
index 4fbfa646..8f9476f1 100644
--- a/src/renderer/wg_engine/tvgWgShaderSrc.h
+++ b/src/renderer/wg_engine/tvgWgShaderSrc.h
@@ -36,20 +36,6 @@ extern const char* cShaderSource_PipelineLinear;
 extern const char* cShaderSource_PipelineRadial;
 extern const char* cShaderSource_PipelineImage;
 
-// pipeline shader modules blit
-extern const char* cShaderSource_PipelineBlit;
-extern const char* cShaderSource_PipelineBlitColor;
-
-// pipeline shader modules composes
-extern const char* cShaderSource_PipelineCompAlphaMask;
-extern const char* cShaderSource_PipelineCompInvAlphaMask;
-extern const char* cShaderSource_PipelineCompLumaMask;
-extern const char* cShaderSource_PipelineCompInvLumaMask;
-extern const char* cShaderSource_PipelineCompAddMask;
-extern const char* cShaderSource_PipelineCompSubtractMask;
-extern const char* cShaderSource_PipelineCompIntersectMask;
-extern const char* cShaderSource_PipelineCompDifferenceMask;
-
 //*****************************************************************************
 // compute shader modules
 //*****************************************************************************