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Refactor ImageFilter to remove channel1_output_session and update blending logic in shaders

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brunoherbelin
2025-11-08 14:11:37 +01:00
parent bdc313cd1f
commit 0ef06e400d
3 changed files with 9 additions and 14 deletions
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5
rsc/shaders/filters/blend.glsl
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@@ -1,11 +1,12 @@
// Blending of source texture (channel 0) with output window loopback (channel 1)
// Blending of source texture (channel 0) with texture of an external Source
// by Bruno Herbelin for vimix
uniform float Blend;
uniform sampler2D Source;
void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
vec2 uv = fragCoord.xy / iResolution.xy;
fragColor = mix( texture(iChannel0, uv), texture(iChannel1, uv), Blend);
fragColor = mix( texture(iChannel0, uv), texture(Source, uv), Blend);
}

17
src/ImageFilter.cpp
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@@ -337,7 +337,7 @@ void ImageFilteringShader::copy(ImageFilteringShader const& S)
/// ////
////////////////////////////////////////
ImageFilter::ImageFilter (): FrameBufferFilter(), buffers_({nullptr, nullptr}), channel1_output_session(true)
ImageFilter::ImageFilter (): FrameBufferFilter(), buffers_({nullptr, nullptr})
{
// surface and shader for first pass
shaders_.first = new ImageFilteringShader;
@@ -459,8 +459,6 @@ void ImageFilter::draw (FrameBuffer *input)
if ( enabled() || forced )
{
// FIRST PASS
if (channel1_output_session)
shaders_.first->secondary_texture = Mixer::manager().session()->frame()->texture();
// loop over sampler2D uniforms to bind textures
uint texture_unit = 0;
@@ -480,8 +478,6 @@ void ImageFilter::draw (FrameBuffer *input)
// SECOND PASS
if ( program_.isTwoPass() ) {
if (channel1_output_session)
shaders_.second->secondary_texture = Mixer::manager().session()->frame()->texture();
// render filtered surface from first pass into frame buffer
buffers_.second->begin();
surfaces_.second->draw(glm::identity<glm::mat4>(), buffers_.second->projection());
@@ -703,7 +699,7 @@ std::vector< FilteringProgram > ResampleFilter::programs_ = {
ResampleFilter::ResampleFilter (): ImageFilter(), factor_(RESAMPLE_INVALID)
{
channel1_output_session = false;
}
void ResampleFilter::setFactor(int factor)
@@ -841,7 +837,6 @@ std::vector< FilteringProgram > BlurFilter::programs_ = {
BlurFilter::BlurFilter (): ImageFilter(), method_(BLUR_INVALID), mipmap_buffer_(nullptr)
{
mipmap_surface_ = new Surface;
channel1_output_session = false;
}
BlurFilter::~BlurFilter ()
@@ -983,7 +978,7 @@ std::vector< FilteringProgram > SharpenFilter::programs_ = {
SharpenFilter::SharpenFilter (): ImageFilter(), method_(SHARPEN_INVALID)
{
channel1_output_session = false;
}
void SharpenFilter::setMethod(int method)
@@ -1061,7 +1056,7 @@ std::vector< FilteringProgram > SmoothFilter::programs_ = {
SmoothFilter::SmoothFilter (): ImageFilter(), method_(SMOOTH_INVALID)
{
channel1_output_session = false;
}
void SmoothFilter::setMethod(int method)
@@ -1132,7 +1127,7 @@ std::vector< FilteringProgram > EdgeFilter::programs_ = {
EdgeFilter::EdgeFilter (): ImageFilter(), method_(EDGE_INVALID)
{
channel1_output_session = false;
}
void EdgeFilter::setMethod(int method)
@@ -1203,7 +1198,7 @@ std::vector< FilteringProgram > AlphaFilter::programs_ = {
AlphaFilter::AlphaFilter (): ImageFilter(), operation_(ALPHA_INVALID)
{
channel1_output_session = false;
}
void AlphaFilter::setOperation(int op)

1
src/ImageFilter.h
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@@ -169,7 +169,6 @@ protected:
std::pair< FrameBuffer *, FrameBuffer * > buffers_;
std::pair< ImageFilteringShader *, ImageFilteringShader *> shaders_;
void updateParameters();
bool channel1_output_session;
};