implemented basic renderer

src/renderer/buffer.c

@@ -0,0 +1,68 @@
+#include "buffer.h"
+
+#include <assert.h>
+#include <glad/glad.h>
+
+void create_vao(VertexArrayObject* vao)
+{
+	assert(vao);
+	glGenVertexArrays(1, &vao->vao);
+}
+
+void destroy_vao(VertexArrayObject vao)
+{
+	glDeleteBuffers(1, &vao.ebo);
+	glDeleteBuffers(1, &vao.vbo);
+
+	glDeleteVertexArrays(1, &vao.vao);
+}
+
+void attach_vertex_buffer(VertexArrayObject* vao, const float* data, size_t size)
+{
+	assert(vao);
+	glBindVertexArray(vao->vao);
+
+	glGenBuffers(1, &vao->vbo);
+	glBindBuffer(GL_ARRAY_BUFFER, vao->vbo);
+
+	glBufferData(GL_ARRAY_BUFFER, size, (const void*)data, GL_STATIC_DRAW);
+}
+
+void attach_element_buffer(VertexArrayObject* vao, const unsigned* data, size_t size)
+{
+	assert(vao);
+	glBindVertexArray(vao->vao);
+
+	glGenBuffers(1, &vao->ebo);
+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vao->ebo);
+
+	glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, (const void*)data, GL_STATIC_DRAW);
+
+	vao->elements = size / sizeof(unsigned);
+}
+
+void set_vertex_layout(VertexArrayObject* vao, VertexAttribute* attributes, size_t count)
+{
+	assert(vao);
+	assert(attributes);
+
+	glBindVertexArray(vao->vao);
+
+	size_t stride = 0;
+	for (size_t i = 0; i < count; i++) {
+		stride += attributes[i].size;
+	}
+
+	size_t offset = 0;
+	for (size_t i = 0; i < count; i++) {
+		glVertexAttribPointer(i, attributes[i].count, attributes[i].type, GL_FALSE, stride, (const void*)(offset));
+		glEnableVertexAttribArray(i);
+
+		offset += attributes[i].size;
+	}
+}
+
+void bind_vao(VertexArrayObject vao)
+{
+	glBindVertexArray(vao.vao);
+}