hyprlock/src/renderer/Renderer.cpp

#include "Renderer.hpp"
#include "Shaders.hpp"
#include "Screencopy.hpp"
#include "../config/ConfigManager.hpp"
#include "../core/AnimationManager.hpp"
#include "../core/Egl.hpp"
#include "../core/Output.hpp"
#include "../core/hyprlock.hpp"
#include "../helpers/Color.hpp"
#include "../helpers/Log.hpp"
#include <GLES3/gl32.h>
#include <GLES3/gl3ext.h>
#include <GLES2/gl2ext.h>
#include <algorithm>
#include "widgets/PasswordInputField.hpp"
#include "widgets/Background.hpp"
#include "widgets/Label.hpp"
#include "widgets/Image.hpp"
#include "widgets/Shape.hpp"

inline const float fullVerts[] = {
    1, 0, // top right
    0, 0, // top left
    1, 1, // bottom right
    0, 1, // bottom left
};

static GLuint compileShader(const GLuint& type, std::string src) {
    auto shader = glCreateShader(type);

    auto shaderSource = src.c_str();

    glShaderSource(shader, 1, &shaderSource, nullptr);
    glCompileShader(shader);

    GLint ok;
    glGetShaderiv(shader, GL_COMPILE_STATUS, &ok);

    RASSERT(ok != GL_FALSE, "compileShader() failed! GL_COMPILE_STATUS not OK!");

    return shader;
}

static GLuint createProgram(const std::string& vert, const std::string& frag) {
    auto vertCompiled = compileShader(GL_VERTEX_SHADER, vert);

    RASSERT(vertCompiled, "Compiling shader failed. VERTEX NULL! Shader source:\n\n{}", vert);

    auto fragCompiled = compileShader(GL_FRAGMENT_SHADER, frag);

    RASSERT(fragCompiled, "Compiling shader failed. FRAGMENT NULL! Shader source:\n\n{}", frag);

    auto prog = glCreateProgram();
    glAttachShader(prog, vertCompiled);
    glAttachShader(prog, fragCompiled);
    glLinkProgram(prog);

    glDetachShader(prog, vertCompiled);
    glDetachShader(prog, fragCompiled);
    glDeleteShader(vertCompiled);
    glDeleteShader(fragCompiled);

    GLint ok;
    glGetProgramiv(prog, GL_LINK_STATUS, &ok);

    RASSERT(ok != GL_FALSE, "createProgram() failed! GL_LINK_STATUS not OK!");

    return prog;
}

static void glMessageCallbackA(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* message, const void* userParam) {
    if (type != GL_DEBUG_TYPE_ERROR)
        return;
    Debug::log(LOG, "[gl] {}", (const char*)message);
}

CRenderer::CRenderer() {
    g_pEGL->makeCurrent(nullptr);

    glEnable(GL_DEBUG_OUTPUT);
    glDebugMessageCallback(glMessageCallbackA, nullptr);

    GLuint prog          = createProgram(QUADVERTSRC, QUADFRAGSRC);
    rectShader.program   = prog;
    rectShader.proj      = glGetUniformLocation(prog, "proj");
    rectShader.color     = glGetUniformLocation(prog, "color");
    rectShader.posAttrib = glGetAttribLocation(prog, "pos");
    rectShader.topLeft   = glGetUniformLocation(prog, "topLeft");
    rectShader.fullSize  = glGetUniformLocation(prog, "fullSize");
    rectShader.radius    = glGetUniformLocation(prog, "radius");

    prog                        = createProgram(TEXVERTSRC, TEXFRAGSRCRGBA);
    texShader.program           = prog;
    texShader.proj              = glGetUniformLocation(prog, "proj");
    texShader.tex               = glGetUniformLocation(prog, "tex");
    texShader.alphaMatte        = glGetUniformLocation(prog, "texMatte");
    texShader.alpha             = glGetUniformLocation(prog, "alpha");
    texShader.texAttrib         = glGetAttribLocation(prog, "texcoord");
    texShader.matteTexAttrib    = glGetAttribLocation(prog, "texcoordMatte");
    texShader.posAttrib         = glGetAttribLocation(prog, "pos");
    texShader.discardOpaque     = glGetUniformLocation(prog, "discardOpaque");
    texShader.discardAlpha      = glGetUniformLocation(prog, "discardAlpha");
    texShader.discardAlphaValue = glGetUniformLocation(prog, "discardAlphaValue");
    texShader.topLeft           = glGetUniformLocation(prog, "topLeft");
    texShader.fullSize          = glGetUniformLocation(prog, "fullSize");
    texShader.radius            = glGetUniformLocation(prog, "radius");
    texShader.applyTint         = glGetUniformLocation(prog, "applyTint");
    texShader.tint              = glGetUniformLocation(prog, "tint");
    texShader.useAlphaMatte     = glGetUniformLocation(prog, "useAlphaMatte");

    prog                           = createProgram(TEXVERTSRC, TEXMIXFRAGSRCRGBA);
    texMixShader.program           = prog;
    texMixShader.proj              = glGetUniformLocation(prog, "proj");
    texMixShader.tex               = glGetUniformLocation(prog, "tex1");
    texMixShader.tex2              = glGetUniformLocation(prog, "tex2");
    texMixShader.alphaMatte        = glGetUniformLocation(prog, "texMatte");
    texMixShader.alpha             = glGetUniformLocation(prog, "alpha");
    texMixShader.mixFactor         = glGetUniformLocation(prog, "mixFactor");
    texMixShader.texAttrib         = glGetAttribLocation(prog, "texcoord");
    texMixShader.matteTexAttrib    = glGetAttribLocation(prog, "texcoordMatte");
    texMixShader.posAttrib         = glGetAttribLocation(prog, "pos");
    texMixShader.discardOpaque     = glGetUniformLocation(prog, "discardOpaque");
    texMixShader.discardAlpha      = glGetUniformLocation(prog, "discardAlpha");
    texMixShader.discardAlphaValue = glGetUniformLocation(prog, "discardAlphaValue");
    texMixShader.topLeft           = glGetUniformLocation(prog, "topLeft");
    texMixShader.fullSize          = glGetUniformLocation(prog, "fullSize");
    texMixShader.radius            = glGetUniformLocation(prog, "radius");
    texMixShader.applyTint         = glGetUniformLocation(prog, "applyTint");
    texMixShader.tint              = glGetUniformLocation(prog, "tint");
    texMixShader.useAlphaMatte     = glGetUniformLocation(prog, "useAlphaMatte");

    prog                          = createProgram(TEXVERTSRC, FRAGBLUR1);
    blurShader1.program           = prog;
    blurShader1.tex               = glGetUniformLocation(prog, "tex");
    blurShader1.alpha             = glGetUniformLocation(prog, "alpha");
    blurShader1.proj              = glGetUniformLocation(prog, "proj");
    blurShader1.posAttrib         = glGetAttribLocation(prog, "pos");
    blurShader1.texAttrib         = glGetAttribLocation(prog, "texcoord");
    blurShader1.radius            = glGetUniformLocation(prog, "radius");
    blurShader1.halfpixel         = glGetUniformLocation(prog, "halfpixel");
    blurShader1.passes            = glGetUniformLocation(prog, "passes");
    blurShader1.vibrancy          = glGetUniformLocation(prog, "vibrancy");
    blurShader1.vibrancy_darkness = glGetUniformLocation(prog, "vibrancy_darkness");

    prog                  = createProgram(TEXVERTSRC, FRAGBLUR2);
    blurShader2.program   = prog;
    blurShader2.tex       = glGetUniformLocation(prog, "tex");
    blurShader2.alpha     = glGetUniformLocation(prog, "alpha");
    blurShader2.proj      = glGetUniformLocation(prog, "proj");
    blurShader2.posAttrib = glGetAttribLocation(prog, "pos");
    blurShader2.texAttrib = glGetAttribLocation(prog, "texcoord");
    blurShader2.radius    = glGetUniformLocation(prog, "radius");
    blurShader2.halfpixel = glGetUniformLocation(prog, "halfpixel");

    prog                         = createProgram(TEXVERTSRC, FRAGBLURPREPARE);
    blurPrepareShader.program    = prog;
    blurPrepareShader.tex        = glGetUniformLocation(prog, "tex");
    blurPrepareShader.proj       = glGetUniformLocation(prog, "proj");
    blurPrepareShader.posAttrib  = glGetAttribLocation(prog, "pos");
    blurPrepareShader.texAttrib  = glGetAttribLocation(prog, "texcoord");
    blurPrepareShader.contrast   = glGetUniformLocation(prog, "contrast");
    blurPrepareShader.brightness = glGetUniformLocation(prog, "brightness");

    prog                          = createProgram(TEXVERTSRC, FRAGBLURFINISH);
    blurFinishShader.program      = prog;
    blurFinishShader.tex          = glGetUniformLocation(prog, "tex");
    blurFinishShader.proj         = glGetUniformLocation(prog, "proj");
    blurFinishShader.posAttrib    = glGetAttribLocation(prog, "pos");
    blurFinishShader.texAttrib    = glGetAttribLocation(prog, "texcoord");
    blurFinishShader.brightness   = glGetUniformLocation(prog, "brightness");
    blurFinishShader.noise        = glGetUniformLocation(prog, "noise");
    blurFinishShader.colorize     = glGetUniformLocation(prog, "colorize");
    blurFinishShader.colorizeTint = glGetUniformLocation(prog, "colorizeTint");
    blurFinishShader.boostA       = glGetUniformLocation(prog, "boostA");

    prog                               = createProgram(QUADVERTSRC, FRAGBORDER);
    borderShader.program               = prog;
    borderShader.proj                  = glGetUniformLocation(prog, "proj");
    borderShader.thick                 = glGetUniformLocation(prog, "thick");
    borderShader.posAttrib             = glGetAttribLocation(prog, "pos");
    borderShader.texAttrib             = glGetAttribLocation(prog, "texcoord");
    borderShader.topLeft               = glGetUniformLocation(prog, "topLeft");
    borderShader.bottomRight           = glGetUniformLocation(prog, "bottomRight");
    borderShader.fullSize              = glGetUniformLocation(prog, "fullSize");
    borderShader.fullSizeUntransformed = glGetUniformLocation(prog, "fullSizeUntransformed");
    borderShader.radius                = glGetUniformLocation(prog, "radius");
    borderShader.radiusOuter           = glGetUniformLocation(prog, "radiusOuter");
    borderShader.gradient              = glGetUniformLocation(prog, "gradient");
    borderShader.gradientLength        = glGetUniformLocation(prog, "gradientLength");
    borderShader.angle                 = glGetUniformLocation(prog, "angle");
    borderShader.gradient2             = glGetUniformLocation(prog, "gradient2");
    borderShader.gradient2Length       = glGetUniformLocation(prog, "gradient2Length");
    borderShader.angle2                = glGetUniformLocation(prog, "angle2");
    borderShader.gradientLerp          = glGetUniformLocation(prog, "gradientLerp");
    borderShader.alpha                 = glGetUniformLocation(prog, "alpha");

    g_pAnimationManager->createAnimation(0.f, opacity, g_pConfigManager->m_AnimationTree.getConfig("fadeIn"));
}

//
CRenderer::SRenderFeedback CRenderer::renderLock(const CSessionLockSurface& surf) {
    projection = Mat3x3::outputProjection(surf.size, HYPRUTILS_TRANSFORM_NORMAL);

    g_pEGL->makeCurrent(surf.eglSurface);
    glViewport(0, 0, surf.size.x, surf.size.y);

    GLint fb = 0;
    glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &fb);
    pushFb(fb);

    glClearColor(0.0, 0.0, 0.0, 0.0);
    glClear(GL_COLOR_BUFFER_BIT);

    glEnable(GL_BLEND);
    glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

    SRenderFeedback feedback;
    const bool      WAITFORASSETS = !g_pHyprlock->m_bImmediateRender && !g_pAsyncResourceGatherer->gathered;

    if (!WAITFORASSETS) {
        // render widgets
        const auto WIDGETS = getOrCreateWidgetsFor(surf);
        for (auto& w : WIDGETS) {
            feedback.needsFrame = w->draw({opacity->value()}) || feedback.needsFrame;
        }
    }

    feedback.needsFrame = feedback.needsFrame || !g_pAsyncResourceGatherer->gathered;

    glDisable(GL_BLEND);

    return feedback;
}

void CRenderer::renderRect(const CBox& box, const CHyprColor& col, int rounding) {
    const auto ROUNDEDBOX = box.copy().round();
    Mat3x3     matrix     = projMatrix.projectBox(ROUNDEDBOX, HYPRUTILS_TRANSFORM_NORMAL, box.rot);
    Mat3x3     glMatrix   = projection.copy().multiply(matrix);

    glUseProgram(rectShader.program);

    glUniformMatrix3fv(rectShader.proj, 1, GL_TRUE, glMatrix.getMatrix().data());

    // premultiply the color as well as we don't work with straight alpha
    glUniform4f(rectShader.color, col.r * col.a, col.g * col.a, col.b * col.a, col.a);

    const auto TOPLEFT  = Vector2D(ROUNDEDBOX.x, ROUNDEDBOX.y);
    const auto FULLSIZE = Vector2D(ROUNDEDBOX.width, ROUNDEDBOX.height);

    // Rounded corners
    glUniform2f(rectShader.topLeft, (float)TOPLEFT.x, (float)TOPLEFT.y);
    glUniform2f(rectShader.fullSize, (float)FULLSIZE.x, (float)FULLSIZE.y);
    glUniform1f(rectShader.radius, rounding);

    glVertexAttribPointer(rectShader.posAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);

    glEnableVertexAttribArray(rectShader.posAttrib);

    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

    glDisableVertexAttribArray(rectShader.posAttrib);
}

void CRenderer::renderBorder(const CBox& box, const CGradientValueData& gradient, int thickness, int rounding, float alpha) {
    const auto ROUNDEDBOX = box.copy().round();
    Mat3x3     matrix     = projMatrix.projectBox(ROUNDEDBOX, HYPRUTILS_TRANSFORM_NORMAL, box.rot);
    Mat3x3     glMatrix   = projection.copy().multiply(matrix);

    glUseProgram(borderShader.program);

    glUniformMatrix3fv(borderShader.proj, 1, GL_TRUE, glMatrix.getMatrix().data());

    glUniform4fv(borderShader.gradient, gradient.m_vColorsOkLabA.size() / 4, (float*)gradient.m_vColorsOkLabA.data());
    glUniform1i(borderShader.gradientLength, gradient.m_vColorsOkLabA.size() / 4);
    glUniform1f(borderShader.angle, (int)(gradient.m_fAngle / (M_PI / 180.0)) % 360 * (M_PI / 180.0));
    glUniform1f(borderShader.alpha, alpha);
    glUniform1i(borderShader.gradient2Length, 0);

    const auto TOPLEFT  = Vector2D(ROUNDEDBOX.x, ROUNDEDBOX.y);
    const auto FULLSIZE = Vector2D(ROUNDEDBOX.width, ROUNDEDBOX.height);

    glUniform2f(borderShader.topLeft, (float)TOPLEFT.x, (float)TOPLEFT.y);
    glUniform2f(borderShader.fullSize, (float)FULLSIZE.x, (float)FULLSIZE.y);
    glUniform2f(borderShader.fullSizeUntransformed, (float)box.width, (float)box.height);
    glUniform1f(borderShader.radius, rounding);
    glUniform1f(borderShader.radiusOuter, rounding);
    glUniform1f(borderShader.thick, thickness);

    glVertexAttribPointer(borderShader.posAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);
    glVertexAttribPointer(borderShader.texAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);

    glEnableVertexAttribArray(borderShader.posAttrib);
    glEnableVertexAttribArray(borderShader.texAttrib);

    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

    glDisableVertexAttribArray(borderShader.posAttrib);
    glDisableVertexAttribArray(borderShader.texAttrib);
}

void CRenderer::renderTexture(const CBox& box, const CTexture& tex, float a, int rounding, std::optional<eTransform> tr) {
    const auto ROUNDEDBOX = box.copy().round();
    Mat3x3     matrix     = projMatrix.projectBox(ROUNDEDBOX, tr.value_or(HYPRUTILS_TRANSFORM_FLIPPED_180), box.rot);
    Mat3x3     glMatrix   = projection.copy().multiply(matrix);

    CShader*   shader = &texShader;

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(tex.m_iTarget, tex.m_iTexID);

    glUseProgram(shader->program);

    glUniformMatrix3fv(shader->proj, 1, GL_TRUE, glMatrix.getMatrix().data());
    glUniform1i(shader->tex, 0);
    glUniform1f(shader->alpha, a);
    const auto TOPLEFT  = Vector2D(ROUNDEDBOX.x, ROUNDEDBOX.y);
    const auto FULLSIZE = Vector2D(ROUNDEDBOX.width, ROUNDEDBOX.height);

    // Rounded corners
    glUniform2f(shader->topLeft, TOPLEFT.x, TOPLEFT.y);
    glUniform2f(shader->fullSize, FULLSIZE.x, FULLSIZE.y);
    glUniform1f(shader->radius, rounding);

    glUniform1i(shader->discardOpaque, 0);
    glUniform1i(shader->discardAlpha, 0);
    glUniform1i(shader->applyTint, 0);

    glVertexAttribPointer(shader->posAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);
    glVertexAttribPointer(shader->texAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);

    glEnableVertexAttribArray(shader->posAttrib);
    glEnableVertexAttribArray(shader->texAttrib);

    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

    glDisableVertexAttribArray(shader->posAttrib);
    glDisableVertexAttribArray(shader->texAttrib);

    glBindTexture(tex.m_iTarget, 0);
}

void CRenderer::renderTextureMix(const CBox& box, const CTexture& tex, const CTexture& tex2, float a, float mixFactor, int rounding, std::optional<eTransform> tr) {
    const auto ROUNDEDBOX = box.copy().round();
    Mat3x3     matrix     = projMatrix.projectBox(ROUNDEDBOX, tr.value_or(HYPRUTILS_TRANSFORM_FLIPPED_180), box.rot);
    Mat3x3     glMatrix   = projection.copy().multiply(matrix);

    CShader*   shader = &texMixShader;

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(tex.m_iTarget, tex.m_iTexID);

    glActiveTexture(GL_TEXTURE1);
    glBindTexture(tex2.m_iTarget, tex2.m_iTexID);

    glUseProgram(shader->program);

    glUniformMatrix3fv(shader->proj, 1, GL_TRUE, glMatrix.getMatrix().data());
    glUniform1i(shader->tex, 0);
    glUniform1i(shader->tex2, 1);
    glUniform1f(shader->alpha, a);
    glUniform1f(shader->mixFactor, mixFactor);
    const auto TOPLEFT  = Vector2D(ROUNDEDBOX.x, ROUNDEDBOX.y);
    const auto FULLSIZE = Vector2D(ROUNDEDBOX.width, ROUNDEDBOX.height);

    // Rounded corners
    glUniform2f(shader->topLeft, TOPLEFT.x, TOPLEFT.y);
    glUniform2f(shader->fullSize, FULLSIZE.x, FULLSIZE.y);
    glUniform1f(shader->radius, rounding);

    glUniform1i(shader->discardOpaque, 0);
    glUniform1i(shader->discardAlpha, 0);
    glUniform1i(shader->applyTint, 0);

    glVertexAttribPointer(shader->posAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);
    glVertexAttribPointer(shader->texAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);

    glEnableVertexAttribArray(shader->posAttrib);
    glEnableVertexAttribArray(shader->texAttrib);

    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

    glDisableVertexAttribArray(shader->posAttrib);
    glDisableVertexAttribArray(shader->texAttrib);

    glBindTexture(tex.m_iTarget, 0);
}

template <class Widget>
static void createWidget(std::vector<ASP<IWidget>>& widgets) {
    const auto W = makeAtomicShared<Widget>();
    W->registerSelf(W);
    widgets.emplace_back(W);
}

std::vector<ASP<IWidget>>& CRenderer::getOrCreateWidgetsFor(const CSessionLockSurface& surf) {
    RASSERT(surf.m_outputID != OUTPUT_INVALID, "Invalid output ID!");

    if (!widgets.contains(surf.m_outputID)) {
        auto CWIDGETS = g_pConfigManager->getWidgetConfigs();

        std::ranges::sort(CWIDGETS, [](CConfigManager::SWidgetConfig& a, CConfigManager::SWidgetConfig& b) {
            return std::any_cast<Hyprlang::INT>(a.values.at("zindex")) < std::any_cast<Hyprlang::INT>(b.values.at("zindex"));
        });

        const auto POUTPUT = surf.m_outputRef.lock();
        for (auto& c : CWIDGETS) {
            if (!c.monitor.empty() && c.monitor != POUTPUT->stringPort && !POUTPUT->stringDesc.starts_with(c.monitor) && !("desc:" + POUTPUT->stringDesc).starts_with(c.monitor))
                continue;

            // by type
            if (c.type == "background") {
                createWidget<CBackground>(widgets[surf.m_outputID]);
            } else if (c.type == "input-field") {
                createWidget<CPasswordInputField>(widgets[surf.m_outputID]);
            } else if (c.type == "label") {
                createWidget<CLabel>(widgets[surf.m_outputID]);
            } else if (c.type == "shape") {
                createWidget<CShape>(widgets[surf.m_outputID]);
            } else if (c.type == "image") {
                createWidget<CImage>(widgets[surf.m_outputID]);
            } else {
                Debug::log(ERR, "Unknown widget type: {}", c.type);
                continue;
            }

            widgets[surf.m_outputID].back()->configure(c.values, POUTPUT);
        }
    }

    return widgets[surf.m_outputID];
}

void CRenderer::blurFB(const CFramebuffer& outfb, SBlurParams params) {
    glDisable(GL_BLEND);
    glDisable(GL_STENCIL_TEST);

    CBox box{0, 0, outfb.m_vSize.x, outfb.m_vSize.y};
    box.round();
    Mat3x3       matrix   = projMatrix.projectBox(box, HYPRUTILS_TRANSFORM_NORMAL, 0);
    Mat3x3       glMatrix = projection.copy().multiply(matrix);

    CFramebuffer mirrors[2];
    mirrors[0].alloc(outfb.m_vSize.x, outfb.m_vSize.y, true);
    mirrors[1].alloc(outfb.m_vSize.x, outfb.m_vSize.y, true);

    CFramebuffer* currentRenderToFB = &mirrors[0];

    // Begin with base color adjustments - global brightness and contrast
    // TODO: make this a part of the first pass maybe to save on a drawcall?
    {
        mirrors[1].bind();

        glActiveTexture(GL_TEXTURE0);

        glBindTexture(outfb.m_cTex.m_iTarget, outfb.m_cTex.m_iTexID);

        glTexParameteri(outfb.m_cTex.m_iTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

        glUseProgram(blurPrepareShader.program);

        glUniformMatrix3fv(blurPrepareShader.proj, 1, GL_TRUE, glMatrix.getMatrix().data());
        glUniform1f(blurPrepareShader.contrast, params.contrast);
        glUniform1f(blurPrepareShader.brightness, params.brightness);
        glUniform1i(blurPrepareShader.tex, 0);

        glVertexAttribPointer(blurPrepareShader.posAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);
        glVertexAttribPointer(blurPrepareShader.texAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);

        glEnableVertexAttribArray(blurPrepareShader.posAttrib);
        glEnableVertexAttribArray(blurPrepareShader.texAttrib);

        glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

        glDisableVertexAttribArray(blurPrepareShader.posAttrib);
        glDisableVertexAttribArray(blurPrepareShader.texAttrib);

        currentRenderToFB = &mirrors[1];
    }

    // declare the draw func
    auto drawPass = [&](CShader* pShader) {
        if (currentRenderToFB == &mirrors[0])
            mirrors[1].bind();
        else
            mirrors[0].bind();

        glActiveTexture(GL_TEXTURE0);

        glBindTexture(currentRenderToFB->m_cTex.m_iTarget, currentRenderToFB->m_cTex.m_iTexID);

        glTexParameteri(currentRenderToFB->m_cTex.m_iTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

        glUseProgram(pShader->program);

        // prep two shaders
        glUniformMatrix3fv(pShader->proj, 1, GL_TRUE, glMatrix.getMatrix().data());
        glUniform1f(pShader->radius, params.size);
        if (pShader == &blurShader1) {
            glUniform2f(blurShader1.halfpixel, 0.5f / (outfb.m_vSize.x / 2.f), 0.5f / (outfb.m_vSize.y / 2.f));
            glUniform1i(blurShader1.passes, params.passes);
            glUniform1f(blurShader1.vibrancy, params.vibrancy);
            glUniform1f(blurShader1.vibrancy_darkness, params.vibrancy_darkness);
        } else
            glUniform2f(blurShader2.halfpixel, 0.5f / (outfb.m_vSize.x * 2.f), 0.5f / (outfb.m_vSize.y * 2.f));
        glUniform1i(pShader->tex, 0);

        glVertexAttribPointer(pShader->posAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);
        glVertexAttribPointer(pShader->texAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);

        glEnableVertexAttribArray(pShader->posAttrib);
        glEnableVertexAttribArray(pShader->texAttrib);

        glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

        glDisableVertexAttribArray(pShader->posAttrib);
        glDisableVertexAttribArray(pShader->texAttrib);

        if (currentRenderToFB != &mirrors[0])
            currentRenderToFB = &mirrors[0];
        else
            currentRenderToFB = &mirrors[1];
    };

    // draw the things.
    // first draw is swap -> mirr
    mirrors[0].bind();
    glBindTexture(mirrors[1].m_cTex.m_iTarget, mirrors[1].m_cTex.m_iTexID);

    for (int i = 1; i <= params.passes; ++i) {
        drawPass(&blurShader1); // down
    }

    for (int i = params.passes - 1; i >= 0; --i) {
        drawPass(&blurShader2); // up
    }

    // finalize the image
    {
        if (currentRenderToFB == &mirrors[0])
            mirrors[1].bind();
        else
            mirrors[0].bind();

        glActiveTexture(GL_TEXTURE0);

        glBindTexture(currentRenderToFB->m_cTex.m_iTarget, currentRenderToFB->m_cTex.m_iTexID);

        glTexParameteri(currentRenderToFB->m_cTex.m_iTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

        glUseProgram(blurFinishShader.program);

        glUniformMatrix3fv(blurFinishShader.proj, 1, GL_TRUE, glMatrix.getMatrix().data());
        glUniform1f(blurFinishShader.noise, params.noise);
        glUniform1f(blurFinishShader.brightness, params.brightness);
        glUniform1i(blurFinishShader.colorize, params.colorize.has_value());
        if (params.colorize.has_value())
            glUniform3f(blurFinishShader.colorizeTint, params.colorize->r, params.colorize->g, params.colorize->b);
        glUniform1f(blurFinishShader.boostA, params.boostA);

        glUniform1i(blurFinishShader.tex, 0);

        glVertexAttribPointer(blurFinishShader.posAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);
        glVertexAttribPointer(blurFinishShader.texAttrib, 2, GL_FLOAT, GL_FALSE, 0, fullVerts);

        glEnableVertexAttribArray(blurFinishShader.posAttrib);
        glEnableVertexAttribArray(blurFinishShader.texAttrib);

        glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

        glDisableVertexAttribArray(blurFinishShader.posAttrib);
        glDisableVertexAttribArray(blurFinishShader.texAttrib);

        if (currentRenderToFB != &mirrors[0])
            currentRenderToFB = &mirrors[0];
        else
            currentRenderToFB = &mirrors[1];
    }

    // finish
    outfb.bind();
    renderTexture(box, currentRenderToFB->m_cTex, 1.0, 0, HYPRUTILS_TRANSFORM_NORMAL);

    glEnable(GL_BLEND);
}

void CRenderer::pushFb(GLint fb) {
    boundFBs.push_back(fb);
    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fb);
}

void CRenderer::popFb() {
    boundFBs.pop_back();
    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, boundFBs.empty() ? 0 : boundFBs.back());
}

void CRenderer::removeWidgetsFor(OUTPUTID id) {
    widgets.erase(id);
}

void CRenderer::reconfigureWidgetsFor(OUTPUTID id) {
    // TODO: reconfigure widgets by just calling their configure method again.
    // Requires a way to get a widgets config properties.
    // I think the best way would be to store the anonymos key of the widget config.
    removeWidgetsFor(id);
}

void CRenderer::startFadeIn() {
    Debug::log(LOG, "Starting fade in");
    *opacity = 1.f;

    opacity->setCallbackOnEnd([this](auto) { opacity->setConfig(g_pConfigManager->m_AnimationTree.getConfig("fadeOut")); }, true);
}

void CRenderer::startFadeOut(bool unlock) {
    *opacity = 0.f;

    if (unlock)
        opacity->setCallbackOnEnd([](auto) { g_pHyprlock->releaseSessionLock(); }, true);
}