23 lines
1.4 KiB
C++
23 lines
1.4 KiB
C++
#include "gaussianblureffect.h"
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GaussianBlurEffect::GaussianBlurEffect(Clip *c) : Effect(c, EFFECT_TYPE_VIDEO, VIDEO_GAUSSIANBLUR_EFFECT), frag(QOpenGLShader::Fragment), vert(QOpenGLShader::Vertex) {
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enable_opengl = true;
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vert.compileSourceCode("attribute vec2 position;\nvoid main() { gl_Position = vec4(position, 1, 1); }");
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frag.compileSourceCode("uniform vec3 resolution;\nuniform sampler2D image;\nuniform bool flip;\nuniform vec2 direction;\n\nvoid main() {\n vec2 uv = vec2(gl_FragCoord.xy / resolution.xy);\n if (flip) {\n uv.y = 1.0 - uv.y;\n }\n\n vec4 color = vec4(0.0);\n vec2 off1 = vec2(1.3846153846) * direction;\n vec2 off2 = vec2(3.2307692308) * direction;\n color += texture2D(image, uv) * 0.2270270270;\n color += texture2D(image, uv + (off1 / resolution.xy)) * 0.3162162162;\n color += texture2D(image, uv - (off1 / resolution.xy)) * 0.3162162162;\n color += texture2D(image, uv + (off2 / resolution.xy)) * 0.0702702703;\n color += texture2D(image, uv - (off2 / resolution.xy)) * 0.0702702703;\n gl_FragColor = color;\n}\n");
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program.addShader(&frag);
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program.addShader(&vert);
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program.link();
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}
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void GaussianBlurEffect::process_gl(double timecode, GLTextureCoords &coords) {
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program.bind();
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program.setUniformValue("resolution", 1920, 1080, 0);
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program.setUniformValue("flip", true);
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program.setUniformValue("direction", 0, 20);
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}
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void GaussianBlurEffect::clean_gl() {
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program.release();
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}
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