draw()

void fl::Blend2d::draw ( DrawContext context )

overridevirtual

Parameters

now	The current time in milliseconds. Fx writers are encouraged to use this instead of millis() directly as this will more deterministic behavior.

Implements fl::Fx.

Definition at line 57 of file blend.cpp.hpp.

                                                   {
    mFrame->clear();
    mFrameTransform->clear();
 
    // Draw each layer in reverse order and applying the blending.
    bool first = true;
    for (auto it = mLayers.begin(); it != mLayers.end(); ++it) {
        DrawContext tmp_ctx = context;
        tmp_ctx.leds = mFrame->rgb();
        auto &fx = it->fx;
        fx->draw(tmp_ctx);
        DrawMode mode = first ? DrawMode::DRAW_MODE_OVERWRITE
                              : DrawMode::DRAW_MODE_BLEND_BY_MAX_BRIGHTNESS;
        first = false;
        // Apply the blur effect per effect.
        u8 blur_amount = it->blur_amount;
        if (blur_amount > 0) {
            const XYMap &xyMap = fx->getXYMap();
            u8 blur_passes = fl::max(1, it->blur_passes);
            for (u8 i = 0; i < blur_passes; ++i) {
                // Apply the blur effect
                blur2d(mFrame->rgb().data(), mXyMap.getWidth(), mXyMap.getHeight(),
                       blur_amount, xyMap);
            }
        }
        mFrame->draw(mFrameTransform->rgb(), mode);
    }
 
    if (mGlobalBlurAmount > 0) {
        // Apply the blur effect
        u16 width = mXyMap.getWidth();
        u16 height = mXyMap.getHeight();
        XYMap rect = XYMap::constructRectangularGrid(width, height);
        fl::span<CRGB> rgb = mFrameTransform->rgb();
        u8 blur_passes = fl::max(1, mGlobalBlurPasses);
        for (u8 i = 0; i < blur_passes; ++i) {
            // Apply the blur effect
            blur2d(rgb, width, height, mGlobalBlurAmount, rect);
        }
    }
 
    // Copy the final result to the output
    // memcpy(mFrameTransform->rgb(), context.leds, sizeof(CRGB) *
    // mXyMap.getTotal());
    mFrameTransform->drawXY(context.leds, mXyMap,
                            DrawMode::DRAW_MODE_OVERWRITE);
}

References fl::blur2d(), fl::XYMap::constructRectangularGrid(), fl::DRAW_MODE_BLEND_BY_MAX_BRIGHTNESS, fl::DRAW_MODE_OVERWRITE, fl::FL_NO_EXCEPT, fl::height, fl::DrawContext::leds, fl::max(), mFrame, mFrameTransform, mGlobalBlurAmount, mGlobalBlurPasses, mLayers, fl::Fx2d::mXyMap, fl::width, and fl::Fx2d::xyMap().

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