98 lines
2.4 KiB
C++
98 lines
2.4 KiB
C++
#pragma once
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#include <extra2d/core/color.h>
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#include <extra2d/core/math_types.h>
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#include <extra2d/core/types.h>
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#include <extra2d/graphics/opengl/gl_shader.h>
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#include <extra2d/graphics/texture.h>
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#include <glm/mat4x4.hpp>
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#include <vector>
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#include <array>
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#include <glad/glad.h>
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namespace extra2d {
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// ============================================================================
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// OpenGL 精灵批渲染器 - 优化版本
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// ============================================================================
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class GLSpriteBatch {
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public:
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static constexpr size_t MAX_SPRITES = 10000;
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static constexpr size_t VERTICES_PER_SPRITE = 4;
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static constexpr size_t INDICES_PER_SPRITE = 6;
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static constexpr size_t MAX_VERTICES = MAX_SPRITES * VERTICES_PER_SPRITE;
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static constexpr size_t MAX_INDICES = MAX_SPRITES * INDICES_PER_SPRITE;
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struct Vertex {
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glm::vec2 position;
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glm::vec2 texCoord;
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glm::vec4 color;
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};
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struct SpriteData {
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glm::vec2 position;
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glm::vec2 size;
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glm::vec2 texCoordMin;
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glm::vec2 texCoordMax;
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glm::vec4 color;
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float rotation;
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glm::vec2 anchor;
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bool isSDF = false;
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};
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GLSpriteBatch();
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~GLSpriteBatch();
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bool init();
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void shutdown();
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void begin(const glm::mat4 &viewProjection);
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void draw(const Texture &texture, const SpriteData &data);
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void end();
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// 批量绘制接口 - 用于自动批处理
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void drawBatch(const Texture& texture, const std::vector<SpriteData>& sprites);
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// 立即绘制（不缓存）
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void drawImmediate(const Texture& texture, const SpriteData& data);
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// 统计
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uint32_t getDrawCallCount() const { return drawCallCount_; }
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uint32_t getSpriteCount() const { return spriteCount_; }
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uint32_t getBatchCount() const { return batchCount_; }
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// 检查是否需要刷新
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bool needsFlush(const Texture& texture, bool isSDF) const;
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private:
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GLuint vao_;
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GLuint vbo_;
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GLuint ibo_;
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GLShader shader_;
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// 使用固定大小数组减少内存分配
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std::array<Vertex, MAX_VERTICES> vertexBuffer_;
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size_t vertexCount_;
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const Texture *currentTexture_;
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bool currentIsSDF_;
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glm::mat4 viewProjection_;
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// 缓存上一帧的 viewProjection，避免重复设置
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glm::mat4 cachedViewProjection_;
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bool viewProjectionDirty_ = true;
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uint32_t drawCallCount_;
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uint32_t spriteCount_;
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uint32_t batchCount_;
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void flush();
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void setupShader();
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// 添加顶点到缓冲区
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void addVertices(const SpriteData& data);
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};
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} // namespace extra2d
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