84 lines
1.9 KiB
C++
84 lines
1.9 KiB
C++
#include "dvr_canvas.h"
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#include <array>
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#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */
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#include <SDL3/SDL.h>
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void Canvas::reset(int32_t width, int32_t height)
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{
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m_width = width;
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m_height = height;
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m_pixels.resize(m_width * m_height);
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for (int32_t i = 0; i < m_width * m_height; i++)
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{
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m_pixels[i].fragementID = -1;
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m_pixels[i].mask = 0;
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m_pixels[i].color = 0;
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}
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m_fragementArray.clear();
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}
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void Canvas::_insertTriangle(const Triangle& triangle)
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{
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for (size_t i = 0; i < triangle.m_pixels.size(); i++)
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{
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const Triangle::Pixel trianglePixel = triangle.m_pixels[i];
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Pixel& pixel = m_pixels[trianglePixel.y * m_width + trianglePixel.x];
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Fragement newFragement;
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newFragement.id = (int32_t)m_fragementArray.size();
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newFragement.color = triangle.m_pixelColor;
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newFragement.mask = trianglePixel.mask;
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newFragement.next = pixel.fragementID;
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pixel.fragementID = newFragement.id;
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m_fragementArray.push_back(newFragement);
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}
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}
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void Canvas::_update_without_AA()
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{
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for (size_t i = 0; i < m_pixels.size(); i++)
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{
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Pixel& pixel = m_pixels[i];
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if (pixel.fragementID < 0) continue;
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const Fragement& fragement = m_fragementArray[pixel.fragementID];
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pixel.mask = fragement.mask;
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pixel.color = fragement.color;
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pixel.alpha = 1.f;
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}
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}
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void Canvas::update(davinci::AntiAliasingTech aaTech, const TriangleArray& triangleArray, const Triangle* pActionTriangle)
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{
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reset(m_width, m_height);
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for (size_t i = 0; i < triangleArray.size(); i++)
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{
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const Triangle& triangle = triangleArray[i];
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_insertTriangle(triangle);
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}
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if (pActionTriangle != nullptr)
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{
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_insertTriangle(*pActionTriangle);
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}
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if (aaTech == davinci::AntiAliasingTech::AA_None)
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{
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_update_without_AA();
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}
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else if (aaTech == davinci::AntiAliasingTech::AA_MSAA_2X2)
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{
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_update_with_AA<4>();
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}
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else if ( aaTech == davinci::AntiAliasingTech::AA_MSAA_4X4)
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{
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_update_with_AA<16>();
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}
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}
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