177 lines
No EOL
7.4 KiB
C++
177 lines
No EOL
7.4 KiB
C++
/*
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Crafter®.Graphics
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Copyright (C) 2025 Catcrafts®
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Catcrafts.net
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3.0 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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module Crafter.Graphics:RenderingElementScalingRotating2D_impl;
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import :RenderingElement;
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import :Window;
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import :Types;
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import :Font;
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import std;
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using namespace Crafter;
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RenderingElementScalingRotating2D::RenderingElementScalingRotating2D(OpaqueType opaque) : RenderingElement(opaque), rotation(0) {
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}
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RenderingElementScalingRotating2D::RenderingElementScalingRotating2D(OpaqueType 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), rotation(0) {
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}
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RenderingElementScalingRotating2D::RenderingElementScalingRotating2D(OpaqueType opaque, std::uint_fast32_t bufferWidth, std::uint_fast32_t bufferHeight, std::uint_fast32_t rotation, double scaleX, double scaleY, 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)
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: bufferWidth(bufferWidth), bufferHeight(bufferHeight), buffer(bufferWidth*bufferHeight),
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rotation(rotation),
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RenderingElement(opaque, anchorX, anchorY, relativeWidth, relativeHeight, anchorOffsetX, anchorOffsetY, z, ignoreScaling) {
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}
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void RenderingElementScalingRotating2D::ResizeBuffer(std::uint_fast32_t width, std::uint_fast32_t height) {
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this->bufferWidth = width;
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this->bufferHeight = height;
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buffer.resize(width * height);
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}
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void RenderingElementScalingRotating2D::UpdateRotation(std::uint_fast32_t rotation) {
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rotationUpdated = true;
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this->rotation = rotation;
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}
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void RenderingElementScalingRotating2D::UpdateScaledBuffer(ScaleData& scaled) {
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// Rotation
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const double rad = (static_cast<double>(rotation) / static_cast<double>(std::numeric_limits<std::uint_fast32_t>::max())) * 2.0 * std::numbers::pi;
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std::uint_fast32_t dstWidth = scaled.width;
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std::uint_fast32_t dstHeight = scaled.height;
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const double rotatedWidth = scaled.width * (std::abs(std::cos(rad)) + std::abs(std::sin(rad)));
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const double rotatedHeight = scaled.height * (std::abs(std::cos(rad)) + std::abs(std::sin(rad)));
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scaled.width = static_cast<std::uint_fast32_t>(std::ceil(rotatedWidth));
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scaled.height = static_cast<std::uint_fast32_t>(std::ceil(rotatedHeight));
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bufferScaled.resize(scaled.width * scaled.height);
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// Destination center
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const double dstCx = (static_cast<double>(scaled.width) - 1.0) * 0.5;
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const double dstCy = (static_cast<double>(scaled.height) - 1.0) * 0.5;
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// Source center
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const double srcCx = (static_cast<double>(bufferWidth) - 1.0) * 0.5;
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const double srcCy = (static_cast<double>(bufferHeight) - 1.0) * 0.5;
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const double c = std::cos(rad);
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const double s = std::sin(rad);
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// Scale factors (destination → source)
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const double scaleX = static_cast<double>(bufferWidth) / dstWidth;
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const double scaleY = static_cast<double>(bufferHeight) / dstHeight;
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for (std::uint_fast32_t yB = 0; yB < scaled.height; ++yB) {
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for (std::uint_fast32_t xB = 0; xB < scaled.width; ++xB) {
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// ---- Destination pixel relative to center ----
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double dx = static_cast<double>(xB) - dstCx;
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double dy = static_cast<double>(yB) - dstCy;
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// ---- Inverse scale ----
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dx *= scaleX;
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dy *= scaleY;
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// ---- Inverse rotation ----
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double sx = c * dx - s * dy;
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double sy = s * dx + c * dy;
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// ---- Move into source space ----
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sx += srcCx;
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sy += srcCy;
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// ---- Nearest neighbour sampling ----
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const std::int_fast32_t srcX = static_cast<std::int_fast32_t>(std::round(sx));
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const std::int_fast32_t srcY = static_cast<std::int_fast32_t>(std::round(sy));
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if (srcX >= 0 && srcX < bufferWidth && srcY >= 0 && srcY < bufferHeight) {
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bufferScaled[yB * scaled.width + xB] = buffer[srcY * bufferWidth + srcX];
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} else {
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bufferScaled[yB * scaled.width + xB] = {0, 0, 0, 0};
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}
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}
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}
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}
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void RenderingElementScalingRotating2D::UpdatePosition(Window& window) {
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ScaleData oldScale = scaled;
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window.ScaleElement(*this);
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if(oldScale.width != scaled.width || oldScale.height != scaled.height || rotationUpdated) {
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UpdateScaledBuffer(scaled);
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window.AddDirtyRect(oldScale);
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window.AddDirtyRect(scaled);
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std::cout << scaled.width << std::endl;
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rotationUpdated = false;
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} else if(oldScale.x != scaled.x || oldScale.y != scaled.y) {
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const double rad = (static_cast<double>(rotation) / static_cast<double>(std::numeric_limits<std::uint_fast32_t>::max())) * 2.0 * std::numbers::pi;
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const double rotatedWidth = scaled.width * (std::abs(std::cos(rad)) + std::abs(std::sin(rad)));
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const double rotatedHeight = scaled.height * (std::abs(std::cos(rad)) + std::abs(std::sin(rad)));
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scaled.width = static_cast<std::uint_fast32_t>(std::ceil(rotatedWidth));
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scaled.height = static_cast<std::uint_fast32_t>(std::ceil(rotatedHeight));
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window.AddDirtyRect(oldScale);
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window.AddDirtyRect(scaled);
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}
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for(Transform* child : children) {
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child->UpdatePosition(window, *this);
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}
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}
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void RenderingElementScalingRotating2D::UpdatePosition(Window& window, Transform& parent) {
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ScaleData oldScale = scaled;
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window.ScaleElement(*this, parent);
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if(oldScale.width != scaled.width || oldScale.height != scaled.height || rotationUpdated) {
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UpdateScaledBuffer(scaled);
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window.AddDirtyRect(oldScale);
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window.AddDirtyRect(scaled);
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rotationUpdated = false;
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} else if(oldScale.x != scaled.x || oldScale.y != scaled.y) {
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const double rad = (static_cast<double>(rotation) / static_cast<double>(std::numeric_limits<std::uint_fast32_t>::max())) * 2.0 * std::numbers::pi;
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const double rotatedWidth = scaled.width * (std::abs(std::cos(rad)) + std::abs(std::sin(rad)));
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const double rotatedHeight = scaled.height * (std::abs(std::cos(rad)) + std::abs(std::sin(rad)));
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scaled.width = static_cast<std::uint_fast32_t>(std::ceil(rotatedWidth));
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scaled.height = static_cast<std::uint_fast32_t>(std::ceil(rotatedHeight));
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window.AddDirtyRect(oldScale);
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window.AddDirtyRect(scaled);
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}
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for(Transform* child : children) {
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child->UpdatePosition(window, *this);
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}
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} |