// Shared header for render stuff
#ifndef RENDER_SHARED_H
#define RENDER_SHARED_H

#include "utils/maths.h"

enum BufferAccess
{
	BA_READ_ONLY,
	BA_WRITE_ONLY,
	BA_READ_WRITE
};

// texture format
enum PixelFormat
{
	PF_UNKNOWN,
	PF_R8G8B8,
	PF_R8G8B8A8,
	PF_R8G8B8F,
	PF_R8G8B8A8F,

	// Depth formats
	PF_DEPTH32F
};

// Blending functions
enum BlendFactor
{
	BF_ZERO,
	BF_ONE,
	BF_SRC_COLOR,
	BF_ONE_MINUS_SRC_COLOR,
	BF_DST_COLOR,
	BF_ONE_MINUS_DST_COLOR,
	BF_SRC_ALPHA,
	BF_ONE_MINUS_SRC_ALPHA,
	BF_DST_ALPHA,
	BF_ONE_MINUS_DST_ALPHA,
	BF_CONSTANT_COLOR,
	BF_ONE_MINUS_CONSTANT_COLOR,
	BF_CONSTANT_ALPHA,
	BF_ONE_MINUS_CONSTANT_ALPHA
};

enum TextureSurfaceType
{
	TST_COLOR = 1 << 0,
	TST_DEPTH = 1 << 1,
	TST_STENCIL = 1 << 2,
};

enum PrimitiveType
{
	PT_POINTS,
	PT_LINES,
	PT_TRIANGLES
};

enum TextureWrap
{
	TW_REPEAT,
	TW_MIRRORED_REPEAT,
	TW_CLAMP_TO_EDGE,
	TW_CLAMP_TO_BORDER
};

enum TextureFilter
{
	TF_NEAREST,
	TF_LINEAR,
	TF_NEAREST_MIPMAP_NEAREST,
	TF_LINEAR_MIPMAP_NEAREST,
	TF_NEAREST_MIPMAP_LINEAR,
	TF_LINEAR_MIPMAP_LINEAR
};

// Base structure for render view (view and projection matrices, viewport settings)
struct View
{
	int x, y;
	int width, height;

	float fov;
};

// Global instance of render view
extern View g_renderView;

// pixel format convertion
uint GetGLPF(PixelFormat pf);
uint GetGLInternalPF(PixelFormat pf);
uint GetGLTypePF(PixelFormat pf);

// Blending factor convertion
uint GetGLBlendFactor(BlendFactor factor);

// Stretched picture vertex
//struct StretchedVertex
//{
//	Vec3 position;
//	Vec2 texcoord;
//};

//#define MAX_STRETCH_VX 12 * sizeof(StretchedVertex)

#endif