/*
Crafter®.Graphics
Copyright (C) 2025 Catcrafts®
Catcrafts.net

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3.0 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
*/

module Crafter.Graphics:RenderingElement_impl;
import :RenderingElement;
import :Window;
import :Types;
import :Font;
import std;

using namespace Crafter;

RenderingElement::RenderingElement(bool opaque) : Transform(), opaque(opaque) {

}


RenderingElement::RenderingElement(bool opaque, std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX, std::int_fast32_t anchorOffsetY, std::int_fast32_t z, bool ignoreScaling) : Transform(anchorX, anchorY, relativeWidth, relativeHeight, anchorOffsetX, anchorOffsetY, z, ignoreScaling), opaque(opaque) {

}

RenderingElementPreScaled::RenderingElementPreScaled(bool opaque) : RenderingElement(opaque) {

}

RenderingElementPreScaled::RenderingElementPreScaled(bool opaque, std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX, std::int_fast32_t anchorOffsetY, std::int_fast32_t z, bool ignoreScaling) : RenderingElement(opaque, anchorX, anchorY, relativeWidth, relativeHeight, anchorOffsetX, anchorOffsetY, z, ignoreScaling) {

}

RenderingElementScaling::RenderingElementScaling(bool opaque) : RenderingElement(opaque) {

}

RenderingElementScaling::RenderingElementScaling(bool opaque, std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX, std::int_fast32_t anchorOffsetY, std::int_fast32_t z, bool ignoreScaling) : RenderingElement(opaque, anchorX, anchorY, relativeWidth, relativeHeight, anchorOffsetX, anchorOffsetY, z, ignoreScaling) {

}

RenderingElementScaling::RenderingElementScaling(bool opaque, std::uint_fast32_t bufferWidth, std::uint_fast32_t bufferHeight, std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX, std::int_fast32_t anchorOffsetY, std::int_fast32_t z, bool ignoreScaling) : bufferWidth(bufferWidth), bufferHeight(bufferHeight), buffer(bufferWidth*bufferHeight), RenderingElement(opaque, anchorX, anchorY, relativeWidth, relativeHeight, anchorOffsetX, anchorOffsetY, z, ignoreScaling) {

}



void RenderingElementPreScaled::UpdatePosition(Window& window) {
    ScaleData oldScale = scaled;
    window.ScaleElement(*this);

    if(oldScale.width != scaled.width || oldScale.height != scaled.height) {
        bufferScaled.resize(scaled.width * scaled.height);
        window.AddDirtyRect(oldScale);
        window.AddDirtyRect(scaled);
    } else if(oldScale.x != scaled.x || oldScale.y != scaled.y) {
        window.AddDirtyRect(oldScale);
        window.AddDirtyRect(scaled);
    }
    
    for(Transform* child : children) {
		child->UpdatePosition(window, *this);
	}
}

void RenderingElementPreScaled::UpdatePosition(Window& window, Transform& parent) {
    ScaleData oldScale = scaled;
    window.ScaleElement(*this, parent);

    if(oldScale.width != scaled.width || oldScale.height != scaled.height) {
        bufferScaled.resize(scaled.width * scaled.height);
        window.AddDirtyRect(oldScale);
        window.AddDirtyRect(scaled);
    } else if(oldScale.x != scaled.x || oldScale.y != scaled.y) {
        window.AddDirtyRect(oldScale);
        window.AddDirtyRect(scaled);
    }
    
    for(Transform* child : children) {
		child->UpdatePosition(window, *this);
	}
}

void RenderingElementPreScaled::CopyNearestNeighbour(Pixel_BU8_GU8_RU8_AU8* dst, std::uint_fast32_t dstWidth, std::uint_fast32_t dstHeight) const {
    for (std::uint_fast32_t y = 0; y < dstHeight; y++) {
		std::uint_fast32_t srcY = y * scaled.height / dstHeight;
        for (std::uint_fast32_t x = 0; x < dstWidth; x++) {
            std::uint_fast32_t srcX = x * scaled.width / dstWidth;
            dst[y * dstWidth + x] = bufferScaled[srcY * scaled.width + srcX];
        }
    }
}

void RenderingElementScaling::CopyNearestNeighbour(Pixel_BU8_GU8_RU8_AU8* dst, std::uint_fast32_t dstWidth, std::uint_fast32_t dstHeight) const {
    for (std::uint_fast32_t y = 0; y < dstHeight; y++) {
		std::uint_fast32_t srcY = y * bufferHeight / dstHeight;
        for (std::uint_fast32_t x = 0; x < dstWidth; x++) {
            std::uint_fast32_t srcX = x * bufferWidth / dstWidth;
            dst[y * dstWidth + x] = buffer[srcY * bufferWidth + srcX];
        }
    }
}

void RenderingElementScaling::UpdatePosition(Window& window) {
    ScaleData oldScale = scaled;
    window.ScaleElement(*this);

    
    if(oldScale.width != scaled.width || oldScale.height != scaled.height) {
        bufferScaled.resize(scaled.width * scaled.height);
        CopyNearestNeighbour(bufferScaled.data(), scaled.width, scaled.height);
        window.AddDirtyRect(oldScale);
        window.AddDirtyRect(scaled);
    } else if(oldScale.x != scaled.x || oldScale.y != scaled.y) {
        window.AddDirtyRect(oldScale);
        window.AddDirtyRect(scaled);
    }

    for(Transform* child : children) {
		child->UpdatePosition(window, *this);
	}
}

void RenderingElementScaling::UpdatePosition(Window& window, Transform& parent) {
    ScaleData oldScale = scaled;
    window.ScaleElement(*this, parent);

    if(oldScale.width != scaled.width || oldScale.height != scaled.height) {
        bufferScaled.resize(scaled.width * scaled.height);
        CopyNearestNeighbour(bufferScaled.data(), scaled.width, scaled.height);
        window.AddDirtyRect(oldScale);
        window.AddDirtyRect(scaled);
    } else if(oldScale.x != scaled.x || oldScale.y != scaled.y) {
        window.AddDirtyRect(oldScale);
        window.AddDirtyRect(scaled);
    }

    for(Transform* child : children) {
		child->UpdatePosition(window, *this);
	}
}

void RenderingElementScaling::ResizeBuffer(std::uint_fast32_t width, std::uint_fast32_t height) {
    this->bufferWidth = width;
    this->bufferHeight = height;
    buffer.resize(width * height);
}