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Performance improvement: disable render when No ImageFilter selected

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This commit is contained in:
Bruno Herbelin
2022-05-03 23:30:21 +02:00
parent 158ea1984f
commit 168ac5065d
1 changed files with 10 additions and 5 deletions
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15
ImageFilter.cpp
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@@ -89,7 +89,7 @@ std::list< ImageFilter > ImageFilter::presets = {
ImageFilter("Sharp Edge", "shaders/filters/sharpenedge.glsl", "", { { "Strength", 0.5} }),
ImageFilter("Freichen", "shaders/filters/freichen.glsl", "", { { "Factor", 0.5} }),
ImageFilter("Sobel", "shaders/filters/sobel.glsl", "", { { "Factor", 0.5} }),
ImageFilter("Pixelate", "shaders/filters/pixelate.glsl", "", { { "Size", 0.5}, { "Edge", 0.5} }),
ImageFilter("Pixelate", "shaders/filters/pixelate.glsl", "", { { "Size", 0.5}, { "Sharpen", 0.5} }),
ImageFilter("Chromakey","shaders/filters/chromakey.glsl", "", { { "Red", 0.05}, { "Green", 0.63}, { "Blue", 0.14}, { "Tolerance", 0.54} }),
ImageFilter("Fisheye", "shaders/filters/fisheye.glsl", "", { { "Factor", 0.5} }),
};
@@ -284,7 +284,7 @@ void ImageFilteringShader::copy(ImageFilteringShader const& S)
}
ImageFilterRenderer::ImageFilterRenderer(glm::vec3 resolution): enabled_(true)
ImageFilterRenderer::ImageFilterRenderer(glm::vec3 resolution): enabled_(false)
{
shaders_.first = new ImageFilteringShader;
surfaces_.first = new Surface(shaders_.first);
@@ -327,13 +327,16 @@ void ImageFilterRenderer::draw()
{
if ( enabled_ )
{
// render filtered surface into frame buffer
// FIRST PASS
// render input surface into frame buffer
buffers_.first->begin();
surfaces_.first->draw(glm::identity<glm::mat4>(), buffers_.first->projection());
buffers_.first->end();
// SECOND PASS
if ( buffers_.second && surfaces_.second ) {
// render filtered surface into frame buffer
// render filtered surface from first pass into frame buffer
surfaces_.second->setTextureIndex( buffers_.first->texture() );
buffers_.second->begin();
surfaces_.second->draw(glm::identity<glm::mat4>(), buffers_.second->projection());
buffers_.second->end();
@@ -351,6 +354,9 @@ void ImageFilterRenderer::setFilter(const ImageFilter &f, std::promise<std::stri
// always keep local copy
filter_ = f;
// force disable when using default filter
enabled_ = filter_ != ImageFilter::presets.front();
// change code
std::pair<std::string, std::string> codes = filter_.code();
@@ -378,7 +384,6 @@ void ImageFilterRenderer::setFilter(const ImageFilter &f, std::promise<std::stri
// create shader, surface and buffer for second pass
shaders_.second = new ImageFilteringShader;
surfaces_.second = new Surface(shaders_.second);
surfaces_.second->setTextureIndex( buffers_.first->texture() );
buffers_.second = new FrameBuffer( buffers_.first->resolution(), true );
}