1 files changed, 97 insertions, 0 deletions
diff --git a/yage/render/spritebatch.h b/yage/render/spritebatch.h
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+++ b/yage/render/spritebatch.h
@@ -0,0 +1,97 @@
+/** ---------------------------------------------------------------------------
+ * @file: spritebatch.h
+ *
+ * Copyright (c) 2017 Yann Herklotz Grave <ymherklotz@gmail.com>
+ * MIT License, see LICENSE file for more details.
+ * ----------------------------------------------------------------------------
+ */
+
+#ifndef YAGE_SPRITE_BATCH_H
+#define YAGE_SPRITE_BATCH_H
+
+#include "../data/vertex.h"
+#include "batch.h"
+
+#include <glad/glad.h>
+#include <glm/glm.hpp>
+
+#include <vector>
+
+namespace yage
+{
+
+namespace details
+{
+
+struct RenderBatch {
+    GLint offset;
+    GLsizei num_vertices;
+    GLuint texture;
+
+    RenderBatch(GLint offset_i, GLsizei num_vertices_i, GLuint texture_i)
+        : offset(offset_i), num_vertices(num_vertices_i), texture(texture_i)
+    {
+    }
+};
+
+/** Glyph with information of the texture.
+ */
+struct Glyph {
+    GLuint texture;
+    float depth;
+    Vertex top_left;
+    Vertex top_right;
+    Vertex bottom_right;
+    Vertex bottom_left;
+
+    Glyph(GLuint texture_i, float depth_i, const Vertex &top_left_i,
+          const Vertex &top_right_i, const Vertex &bottom_right_i,
+          const Vertex &bottom_left_i)
+        : texture(texture_i), depth(depth_i), top_left(top_left_i),
+          top_right(top_right_i), bottom_right(bottom_right_i),
+          bottom_left(bottom_left_i)
+    {
+    }
+};
+
+} // namespace details
+
+class SpriteBatch
+{
+public:
+    static const int NUM_VERTICES = 6;
+
+private:
+    GLuint vao_;
+    GLuint vbo_;
+    std::vector<details::Glyph> glyphs_;
+    std::vector<details::Glyph *> glyph_ptrs_;
+    std::vector<details::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 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 Colour &colour, float depth);
+    // render the batch
+    void render();
+
+private:
+    void createRenderBatches();
+    void sortGlyphs();
+};
+
+} // namespace yage
+
+#endif