//
// Copyright (c) 2009-2010 Mikko Mononen memon@inside.org
//
// 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.
//

#ifndef IMGUI_H
#define IMGUI_H

enum imguiMouseButton
{
	IMGUI_MBUT_LEFT = 0x01, 
	IMGUI_MBUT_RIGHT = 0x02, 
};

enum imguiTextAlign
{
	IMGUI_ALIGN_LEFT,
	IMGUI_ALIGN_CENTER,
	IMGUI_ALIGN_RIGHT,
};

inline unsigned int imguiRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a=255)
{
	return (r) | (g << 8) | (b << 16) | (a << 24);
}

struct imguiGfxRect;

void imguiBeginFrame(int mx, int my, unsigned char mbut, int scroll);
void imguiEndFrame();

bool imguiBeginScrollArea(const char* name, int x, int y, int w, int h, int* scroll);
void imguiEndScrollArea();

void imguiIndent();
void imguiUnindent();
void imguiSeparator();
void imguiSeparatorLine();

bool imguiButton(const char* text, bool enabled = true);
bool imguiItem(const char* text, bool enabled = true, unsigned int color = imguiRGBA(255, 255, 255, 200), bool forceHot = false);
bool imguiCheck(const char* text, bool checked, bool enabled = true);
bool imguiCollapse(const char* text, const char* subtext, bool checked, bool enabled = true);
void imguiLabel(const char* text);
void imguiValue(const char* text);
bool imguiSlider(const char* text, float* val, float vmin, float vmax, float vinc, bool enabled = true);

void imguiDrawText(int x, int y, int align, const char* text, unsigned int color);
void imguiDrawLine(float x0, float y0, float x1, float y1, float r, unsigned int color);
void imguiDrawRoundedRect(float x, float y, float w, float h, float r, unsigned int color);
void imguiDrawRect(float x, float y, float w, float h, unsigned int color);

// Pull render interface.
enum imguiGfxCmdType
{
	IMGUI_GFXCMD_RECT,
	IMGUI_GFXCMD_TRIANGLE,
	IMGUI_GFXCMD_LINE,
	IMGUI_GFXCMD_TEXT,
	IMGUI_GFXCMD_SCISSOR,
};

struct imguiGfxRect
{
	short x,y,w,h,r;
};

struct imguiGfxText
{
	short x,y,align;
	const char* text;
};

struct imguiGfxLine
{
	short x0,y0,x1,y1,r;
};

struct imguiGfxCmd
{
	char type;
	char flags;
	char pad[2];
	unsigned int col;
	union
	{
		imguiGfxLine line;
		imguiGfxRect rect;
		imguiGfxText text;
	};
};

const imguiGfxCmd* imguiGetRenderQueue();
int imguiGetRenderQueueSize();


#endif // IMGUI_H
