1 files changed, 108 insertions, 0 deletions
diff --git a/yage/base/spritebatch.h b/yage/base/spritebatch.h
new file mode 100644
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+++ b/yage/base/spritebatch.h
@@ -0,0 +1,108 @@
+/* ----------------------------------------------------------------------------
+ * spritebatch.h
+ *
+ * Copyright (c) 2017 Yann Herklotz Grave <ymherklotz@gmail.com> -- MIT License
+ * See file LICENSE for more details
+ * ----------------------------------------------------------------------------
+ */
+
+/** @file 
+  */
+
+#ifndef YAGE_SPRITE_BATCH_H
+#define YAGE_SPRITE_BATCH_H
+
+#include "vertex.h"
+
+#include <glad/glad.h>
+#include <glm/glm.hpp>
+
+#include <vector>
+
+namespace yage
+{
+
+class SpriteBatch;
+
+/** Glyph with information of the texture.
+ */
+class Glyph
+{
+private:
+    GLuint texture_;
+    float depth_;
+    Vertex top_left_;
+    Vertex top_right_;
+    Vertex bottom_right_;
+    Vertex bottom_left_;
+
+public:
+    Glyph(GLuint texture, float depth, const Vertex &top_left,
+          const Vertex &top_right, const Vertex &bottom_right,
+          const Vertex &bottom_left);
+
+    GLuint texture() const { return texture_; }
+    float depth() const { return depth_; }
+    Vertex top_left() const { return top_left_; }
+    Vertex top_right() const { return top_right_; }
+    Vertex bottom_right() const { return bottom_right_; }
+    Vertex bottom_left() const { return bottom_left_; }
+};
+
+class RenderBatch
+{
+    friend SpriteBatch;
+
+private:
+    GLsizei num_vertices_;
+    GLint offset_;
+    GLuint texture_;
+
+public:
+    RenderBatch(GLint offset, GLsizei num_vertices, GLuint texture);
+
+    GLint offset() const { return offset_; }
+    GLsizei num_vertices() const { return num_vertices_; }
+    GLuint texture() const { return texture_; }
+};
+
+class SpriteBatch
+{
+public:
+    static const int NUM_VERTICES = 6;
+
+private:
+    GLuint vbo_ = 0;
+    GLuint vao_ = 0;
+    std::vector<Glyph> glyphs_;
+    std::vector<Glyph *> glyph_ptrs_;
+    std::vector<RenderBatch> render_batches_;
+
+public:
+    SpriteBatch();
+    SpriteBatch(const SpriteBatch &) = delete;
+    SpriteBatch(SpriteBatch &&) = delete;
+    ~SpriteBatch();
+
+    SpriteBatch &operator=(const SpriteBatch &) = delete;
+    SpriteBatch &operator=(SpriteBatch &&) = delete;
+
+    // initialize vaos and vbos
+    void init();
+    void begin();
+    void end();
+    // adds a sprite to the sprite batch to be rendered later
+    void draw(const glm::vec4 &destination_rect, const glm::vec4 &uv_rect,
+              GLuint texture, const Color &color, float depth);
+    // render the batch
+    void render();
+
+private:
+    void createVertexArray();
+    void createRenderBatches();
+    void sortGlyphs();
+};
+
+} // namespace yage
+
+#endif