Riyyi
29620c141e
Good place to see the different types of initialization: https://en.cppreference.com/w/cpp/language/explicit
112 lines
2.9 KiB
C++
112 lines
2.9 KiB
C++
#ifndef RENDERER_H
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#define RENDERER_H
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#include <cstdint> // std::uint32_t
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#include <memory> // std::shared_ptr, std::unique_ptr
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#include "glm/ext/matrix_float4x4.hpp" // glm::mat4
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#include "glm/ext/vector_float2.hpp" // glm::vec2
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#include "glm/ext/vector_float3.hpp" // glm::vec3
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#include "glm/ext/vector_float4.hpp" // glm::vec4
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namespace Inferno {
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class Camera;
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class Shader;
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class Texture;
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class Transform;
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class VertexArray;
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struct QuadVertex {
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glm::vec3 position { 0.0f, 0.0f, 0.0f };
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glm::vec4 color { 1.0f, 1.0f, 1.0f, 1.0f };
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glm::vec2 textureCoordinates { 0.0f, 0.0f };
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float textureIndex = 0; // @Todo get int to pass to fragment correctly
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};
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// -----------------------------------------
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class RenderCommand {
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public:
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static void clear();
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static void clearColor(const glm::vec4& color);
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static void drawIndexed(const std::shared_ptr<VertexArray>& vertexArray, uint32_t indexCount = 0);
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static int32_t textureUnitAmount();
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};
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// -----------------------------------------
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class Renderer {
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public:
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static const uint32_t vertexPerQuad = 4;
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static const uint32_t indexPerQuad = 6;
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static const uint32_t textureUnitPerBatch = 32;
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protected:
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virtual void initialize() = 0;
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virtual void destroy() = 0;
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uint32_t addTextureUnit(std::shared_ptr<Texture> texture);
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void bind();
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void unbind();
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virtual void flush() = 0;
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virtual void startBatch() = 0;
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virtual void nextBatch() = 0;
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uint32_t m_quadIndex = 0;
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// Texture units
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static uint32_t m_supportedTextureUnitPerBatch;
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uint32_t m_textureUnitIndex = 1;
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std::array<std::shared_ptr<Texture>, textureUnitPerBatch> m_textureUnits;
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// GPU objects
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std::shared_ptr<Shader> m_shader = nullptr;
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std::shared_ptr<VertexArray> m_vertexArray = nullptr;
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};
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// -----------------------------------------
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class Renderer2D final : public Renderer {
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public:
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static const uint32_t quadCount = 1000;
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static const uint32_t vertexCount = quadCount * vertexPerQuad;
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static const uint32_t indexCount = quadCount * indexPerQuad;
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void initialize() override;
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void destroy() override;
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void beginScene(const std::shared_ptr<Camera>& camera);
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void endScene();
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void drawQuad(std::shared_ptr<Transform> transform, glm::vec4 color);
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void drawQuad(std::shared_ptr<Transform> transform, glm::mat4 color);
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void drawQuad(std::shared_ptr<Transform> transform, glm::vec4 color, std::shared_ptr<Texture> texture);
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void drawQuad(std::shared_ptr<Transform> transform, glm::mat4 color, std::shared_ptr<Texture> texture);
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static inline Renderer2D& the() { return *s_instance; }
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private:
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void flush() override;
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void startBatch() override;
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void nextBatch() override;
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std::shared_ptr<Camera> s_camera;
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// CPU quad vertices
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std::unique_ptr<QuadVertex[]> m_vertexBufferBase = nullptr;
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QuadVertex* m_vertexBufferPtr = nullptr;
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// Default quad vertex positions
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glm::vec4 m_vertexPositions[vertexPerQuad];
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static Renderer2D* s_instance;
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};
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}
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#endif // RENDERER_H
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