renderer2d.hpp

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/*
 * Copyright (C) 2021-2022 Konstanty Misiak
 *
 * SPDX-License-Identifier: MIT
 */
 
#pragma once
#include "jng/core/base.hpp"
 
namespace jng {
 
    class Texture;
    struct CircleRendererComponent;
    struct SpriteRendererComponent;
 
    namespace Renderer2D {
 
        struct DrawQuadProperties
        {
            const glm::vec3* vertexPositions;
            const glm::vec2* textureCoords;
            const Ref<Texture>& texture;
            u32 color;
            s32 entityID = -1;
        };
 
        struct DrawCircleProperties
        {
            const glm::vec3* vertexPositions;
            const glm::vec2* localVertexPositions;
            f32 thickness;
            f32 fade;
            u32 color;
            s32 entityID = -1;
        };
 
        void init();
        void shutdown();
 
        void beginScene(const glm::mat4& viewProjection);
        void endScene();
 
        // Quads
        void drawSprite(const glm::mat4& transform, const SpriteRendererComponent& src, s32 entityID);
        void drawQuad(const DrawQuadProperties& properties);
        
        // Circles
        void drawCircle(const glm::mat4& transform, const CircleRendererComponent& crc, s32 entityID);
        void drawCircle(const glm::mat4& transform, const glm::vec4& color, float thickness = 1.f, float fade = 0.005f);
        void drawCircle(const DrawCircleProperties& properties);
 
        // Lines
        void drawLine(const glm::vec3& p0, const glm::vec3& p1, const glm::vec4& color);
        void drawRect(const glm::mat4& transform, const glm::vec4& color);
 
        void fillQuad(glm::vec3 position, glm::vec2 size, const glm::vec4& color);
        void fillQuad(glm::vec3 position, glm::vec2 size, const Ref<Texture>& texture, const glm::vec4& color = { 1.f, 1.f, 1.f, 1.f });
        void fillQuad(const glm::mat4& transform, const glm::vec4& color);
        void fillQuad(const glm::mat4& transform, const Ref<Texture>& texture, const glm::vec4& color = { 1.f, 1.f, 1.f, 1.f });
 
        struct Statistics
        {
            u32 drawCalls = 0;
            u32 quadCount = 0;
            u32 circleCount = 0;
            u32 lineCount = 0;
        };
 
        const Statistics& getStatistics();
 
    } // namespace Renderer2D
 
} // namespace jng