Working on the new refactor of primitive and shader

src/display/primitive/primitive.h

@@ -0,0 +1,82 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "../../libs.h"
+
+#define PRIMITIVE_POSITIONS_PER_VERTICE 3
+#define PRIMITIVE_COORDINATES_PER_VERTICE 2
+
+/** Structure containing information about a primitive */
+typedef struct {
+  /** How many vertices are in the primitive */
+  int32_t verticeCount;
+  /** How many indices are in the primitive */
+  int32_t indiceCount;
+
+  /** Pointer to the vertex buffer on the GPU */
+  GLuint vertexBuffer;
+  /** Pointer to the index buffer on the GPU */
+  GLuint indexBuffer;
+} primitive_t;
+
+/** Structure containing vertice position information */
+typedef struct {
+  /** Coordinates */
+  float x, y, z;
+  /** Texture UVs */
+  float u, v;
+} vertice_t;
+
+/** Indice that references a specific vertice */
+typedef unsigned int indice_t;
+
+/**
+ * Creates a new primitive.
+ * @param primitive Primitive to initialize.
+ * @param verticeCount How many vertices can the primitive hold.
+ * @param indiceCount How many indices can the primitive hold.
+ */
+void primitiveInit(primitive_t *primitive,
+  int32_t verticeCount, int32_t indiceCount
+);
+
+/**
+ * Buffer Vertices to a primitive for use in rendering.
+ * @param primitive The primitive to buffer vertices into.
+ * @param position The position (index) to overwrite the vertices of.
+ * @param count The count of vertices to buffer.
+ * @param vertices Array of vertices to buffer into the primitive.
+ */
+void primitiveBufferVertices(primitive_t *primitive,
+  int32_t position, int32_t count, vertice_t *vertices
+);
+
+/**
+ * Buffer Indices to a primitive for use in rendering.
+ * @param primitive The primitive to buffer indices into.
+ * @param position The position (index) to overwrite the indices of.
+ * @param count The count of indices to buffer.
+ * @param indices Array of indices to buffer into the primitive.
+ */
+void primitiveBufferIndices(primitive_t *primitive, 
+  int32_t position, int32_t count, indice_t *indices
+);
+
+/**
+ * Draw a primitive. Primitives are drawn by their indices.
+ * @param primitive Primitive to draw.
+ * @param start Start indice (index) to draw.
+ * @param count Count of indices to draw. Use -1 to draw all.
+ */
+void primitiveDraw(primitive_t *primitive, int32_t start, int32_t count);
+
+/**
+ * Cleanup a previously initialized primitive.
+ * @param primitive Primitive to cleanup.
+ */
+void primitiveDispose(primitive_t *primitive);