/*
**  ClanLib SDK
**  Copyright (c) 1997-2005 The ClanLib Team
**
**  This software is provided 'as-is', without any express or implied
**  warranty.  In no event will the authors be held liable for any damages
**  arising from the use of this software.
**
**  Permission is granted to anyone to use this software for any purpose,
**  including commercial applications, and to alter it and redistribute it
**  freely, subject to the following restrictions:
**
**  1. The origin of this software must not be misrepresented; you must not
**     claim that you wrote the original software. If you use this software
**     in a product, an acknowledgment in the product documentation would be
**     appreciated but is not required.
**  2. Altered source versions must be plainly marked as such, and must not be
**     misrepresented as being the original software.
**  3. This notice may not be removed or altered from any source distribution.
**
**  Note: Some of the libraries ClanLib may link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**    Magnus Norddahl
**    (if your name is missing here, please add it)
*/

//! clanDisplay="Display 2D"
//! header=display.h

#ifndef header_surface
#define header_surface

#ifdef CL_API_DLL
#ifdef CL_DISPLAY_EXPORT
#define CL_API_DISPLAY __declspec(dllexport)
#else
#define CL_API_DISPLAY __declspec(dllimport)
#endif
#else
#define CL_API_DISPLAY
#endif

#if _MSC_VER > 1000
#pragma once
#endif

#ifdef _MSC_VER
#pragma warning( disable : 4786)
#endif

#include "blend_func.h"
#include "../Core/Math/origin.h"
#include "color.h"
#include <string>

#include "../Core/Resources/resource.h"
#include "pixel_buffer.h"

class CL_GraphicContext;
class CL_Point;
class CL_Rect;
class CL_ResourceManager;
class CL_Sprite;
class CL_Surface_Generic;
class CL_Canvas;
struct CL_Surface_TargetDrawParams1;

//: Drawing parameters (level 1) for stateless draw of CL_Surface.
//
struct CL_Surface_DrawParams1
{
		CL_Surface_DrawParams1()
		{
			//for compatibility with older code that doesn't know about sub_pixel_accuracy
			sub_pixel_accuracy = false;
		}
	
	int srcX[4];
	int srcY[4];
	double destX[4];
	double destY[4];
	double destZ;
	double red[4];
	double green[4];
	double blue[4];
	double alpha[4];
	CL_BlendFunc blend_src;
	CL_BlendFunc blend_dest;
	CL_BlendFunc blendfunc_src_alpha;
	CL_BlendFunc blendfunc_dest_alpha;
	bool sub_pixel_accuracy;
};

//: Drawing parameters (level 2) for stateless draw of CL_Surface.
struct CL_Surface_DrawParams2
{
	CL_Surface_DrawParams2()
	{
		//for compatibility with older code that doesn't know about sub_pixel_accuracy
		sub_pixel_accuracy = false;
	}

	int srcX;
	int srcY;
	int srcWidth;
	int srcHeight;
	double destX;
	double destY;
	double destZ;
	double red;
	double green;
	double blue;
	double alpha;
	CL_BlendFunc blend_src;
	CL_BlendFunc blend_dest;
	CL_BlendFunc blendfunc_src_alpha;
	CL_BlendFunc blendfunc_dest_alpha;
	double scale_x;
	double scale_y;
	CL_Origin translate_origin;
	int translate_x;
	int translate_y;
	double rotate_angle;
	double rotate_pitch;
	double rotate_yaw;
	CL_Origin rotate_origin;
	int rotate_x;
	int rotate_y;
	bool sub_pixel_accuracy;
};

//: Construct hardware accelerated (where available) 2D surface.
//- !group=Display/Display 2D!
//- !header=display.h!
// TODO: Add flip_vertical, flip_horizontal ?
class CL_API_DISPLAY CL_Surface
{
//! Enums:
public:
	enum Flag
	{
		flag_none = 0,

		//: pixelbuffer will be kept around after creation, to be able
		//: to retrive it with get_pixeldata() without conversion loss.
		flag_keep_pixelbuffer = 1,

		//: surface will be forced to use 16bit even on 32bit displays.
		flag_force_16bit = 2
	};

//! Construction:
public:
	//: Constructs a surface.
	//param provider: Image that surface will use.
	//param delete_provider: If true, will delete provider after it has copied its image data.
	//param flag: Flags which affects how surface will be created.
	//param filename: Name of an image file to load image data from.
	CL_Surface();

	CL_Surface(
		CL_PixelBuffer provider,
		int flag = flag_none);

	CL_Surface(
		const std::string &resource_id,
		CL_ResourceManager *manager);

	CL_Surface(const std::string &filename, int flag = flag_none);

	CL_Surface(const CL_Surface &copy);

	virtual ~CL_Surface();

//! Attributes:
public:
	//: Returns the width.
	int get_width() const;
	
	//: Returns the height.
	int get_height() const;
	
	//: Returns current angle in degrees.
	float get_angle() const;

	//: Returns scale for x and y.
	//- <p> 1.0f is normal scale, 2.0f is twice the size, etc. </p>
	void get_scale(float &x, float &y) const;

	//: Returns current alpha.
	//- <p> Alpha 0.0f is full transparency, and 1.0f is full visibility (solid). </p>
	float get_alpha() const;

	//: Returns current color.
	//- <p> Alpha 0.0f is full transparency, and 1.0f is full visibility (solid). </p>
	void get_color(float &red, float &green, float &blue, float &alpha) const;
	CL_Color get_color() const {float r,g,b,a; get_color(r,g,b,a); return CL_Color(int(r*255.0f),int(g*255.0f),int(b*255.0f),int(a*255.0f));}
	
	//: Returns blending functions.
	void get_blend_func(CL_BlendFunc &src, CL_BlendFunc &dest) const;

	//: Returns translation hotspot.
	void get_alignment(CL_Origin &origin, int &x, int &y) const;

	//: Returns rotation hotspot.
	void get_rotation_hotspot(CL_Origin &origin, int &x, int &y) const;
	
	//: Returns a pixelbuffer object for accessing surface data.
	CL_PixelBuffer get_pixeldata() const;
	
	//: Resource owning this surface, if any.
	CL_Resource resource;

//! Operations:
public:
	//: Copy assignment operator.
	CL_Surface &operator =(const CL_Surface &copy);

	//: Return true if the CL_Surface is valid and useable
	operator bool () const;

	//: Uploads pixel data to surface.
	//!param pos, x, y: Position on surface where pixel data should be put.
	//!param src_rect: Part of pixelbuffer that should be uploaded.
	//!param pixeldata: CL_PixelBuffer containing the image to be uploaded.
	void set_pixeldata(CL_PixelBuffer &pixeldata);
	
	void set_pixeldata(int x, int y, CL_PixelBuffer &pixeldata);
	
	void set_pixeldata(const CL_Point &pos, CL_PixelBuffer &pixeldata);
	
	void set_pixeldata(const CL_Point &pos, const CL_Rect &src_rect, CL_PixelBuffer &pixeldata);

	//: Stateful draw surface on graphic context.
	//- <p>These drawing functions will draw the surface on the graphic context, using the attributes on CL_Surface.
	//- Attributes such as scaling, translate hotspot, rotate hotspot, blend functions, color will be used when
	//- drawing the surface.</p>
	//param x, y: Anchor position of where to render surface. Actual rendering position depends on the anchor and the alignment mode.
	//param context: Graphic context on which to render upon. If null, will use CL_Display's current graphic context.
	//param dest: Rectangle to draw surface in.
	//param src: Rectangle specifying the sub section of a surface to render.
	
	void draw(
		float x = 0,
		float y = 0,
		CL_GraphicContext *context = 0);

	void draw(
		const CL_Rect &dest,
		CL_GraphicContext *context = 0);

	void draw(
		const CL_Rect &src,
		const CL_Rect &dest,
		CL_GraphicContext *context = 0);

	void draw_subpixel(
		float x = 0,
		float y = 0,
		CL_GraphicContext *context = 0);

	void draw_subpixel(
		const CL_Rectf &src,
		const CL_Rectf &dest,
		CL_GraphicContext *context = 0);

	//: Stateless draw surface on graphic context.
	//- <p>Stateless drawing functions will not use any of the state attributes on CL_Surface. The state attributes
	//- on CL_Surface are parameters such as scaling, hotspots, blending functions and color. Instead the drawing
	//- functions take all the parameters it need to perform the render.</p>
	//- Subpixel versions don't perform texture texel shifting or truncate input to integers.
	//param srcX, srcY, srcWidth, srcHeight: Source rectangle for the surface.
	//param srcX[4], srcY[4]: Four vertex points used as the source rectangle for the render.
	//param destX, destY: Destination origin point for render.
	//param destZ: Depth value for zbuffer when rendering.
	//param red[4], green[4], blue[4], alpha[4]: Color for each corner of rectangle.
	//param red, green, blue, alpha: Color for entire rectangle.
	//param blend_src: Source blend function.
	//param blend_dest: Destination blend function.
	//param scale_x, scale_y: Scale values for render.
	//param translate_origin: Alignment origin.
	//param translate_x, translate_y: Translate relative to alignment origin.
	//param rotate_angle: Angle in degrees to rotate the surface in the X-Y direction.
	//param rotate_pitch: Angle in degrees to rotate the surface in the Y-Z direction.
	//param rotate_yaw: Angle in degrees to rotate the surface in the X-Z direction.
	//param rotate_origin: Rotation origin.
	//param rotate_x, rotate_y: Rotation hotspot relative to rotation origin.
	//param sub_pixel_accuracy: If true, floating point data isn't truncated and the texture matrix isn't offset (applicable to GL only)
	//param context: Graphic context on which to render upon. If null, will use CL_Display's current graphic context.
	
	void draw(
		const CL_Surface_DrawParams1& params1,
		CL_GraphicContext *context = 0);

	void draw(
		const CL_Surface_DrawParams2& params2,
		CL_GraphicContext *context = 0);

	//: Utilities for building output data
	//- This allows you to retrieve the filled out param structures, allowing you to tweak the final settings.
	//- This can be useful for effects like skewing an image.

	void setup_params(const CL_Rectf &src,
		const CL_Rectf &dest,
		CL_Surface_DrawParams1 &params1,
		bool sub_pixel_accuracy);

	void setup_target_params(
		const CL_Surface_DrawParams2 &params2,
		CL_Surface_TargetDrawParams1 &t_params1);

	void setup_draw_params(
		const CL_Surface_DrawParams2 & params2,
		const CL_Surface_TargetDrawParams1 *t_params1,
		CL_Surface_DrawParams1 &params1);

	//: Set absolute rotation angle in degrees.
	void set_angle(float angle);
	
	//: Set absolute rotation pitch angle in degrees.
	void set_angle_pitch(float angle);
	
	//: Set absolute rotation yaw angle in degrees.
	void set_angle_yaw(float angle);

	//: Add angle in degrees to current angle.
	void rotate(float angle);
	
	//: Add angle in degrees to current pitch angle.
	void rotate_pitch(float angle);
	
	//: Add angle in degrees to current yaw angle.
	void rotate_yaw(float angle);

	//: Set scale for x and y directions individually.
	//- <p> 1.0f is normal scale, 2.0f is twice the size, etc. </p>
	void set_scale(float x, float y);

	//: Sets transparency.
	//- <p> Alpha 0.0f is full transparency, and 1.0f is full visibility (solid). </p>
	void set_alpha(float alpha);

	//: Sets the color.
	//- <p> Alpha 0.0f is full transparency, and 1.0f is full visibility (solid). </p>
	void set_color(float r, float g, float b, float a = 1.0f);
	void set_color(const CL_Color& c) {set_color(float(c.get_red())/255.0f,float(c.get_green())/255.0f,float(c.get_blue())/255.0f,float(c.get_alpha())/255.0f);}
	
	//: Sets blending functions.
	void set_blend_func(CL_BlendFunc src, CL_BlendFunc dest);

	//: Sets blending functions.
	void set_blend_func_separate(CL_BlendFunc src, CL_BlendFunc dest,
                                     CL_BlendFunc src_alpha, CL_BlendFunc dest_alpha);

	//: Sets translation hotspot.
	void set_alignment(CL_Origin origin, int x = 0, int y = 0);

	//: Sets rotation hotspot.
	void set_rotation_hotspot(CL_Origin origin, int x = 0, int y = 0);

	//  Get the surface handle
	int get_handle();
	
// Implementation:
protected:
	CL_Surface_Generic *impl;

	friend class CL_Canvas;
	friend class CL_GraphicContext;
};

#endif