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/*
 *
 * Beryl blur and reflection effect plugin
 *
 * blurfx.h
 *
 * Copyright : (C) 2006 by Dennis Kasprzyk
 * E-mail    : onestone@beryl-project.org
 *
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#ifndef BLURFX_H_
#define BLURFX_H_

#include "blurfx_shader.h"
#include <string.h>
#define GET_BLURFX_DISPLAY(d)                                  \
    ((BlurfxDisplay *) (d)->privates[displayPrivateIndex].ptr)

#define BLURFX_DISPLAY(d)                                      \
    BlurfxDisplay *bd = GET_BLURFX_DISPLAY (d)

#define GET_BLURFX_SCREEN(s, bd)                               \
    ((BlurfxScreen *) (s)->privates[(bd)->screenPrivateIndex].ptr)

#define BLURFX_SCREEN(s)                                       \
    BlurfxScreen *bs = GET_BLURFX_SCREEN (s, GET_BLURFX_DISPLAY (s->display))

#define GET_BLURFX_WINDOW(w, bs)                               \
    ((BlurfxWindow *) (w)->privates[(bs)->windowPrivateIndex].ptr)

#define BLURFX_WINDOW_PTR(w)                                   \
    GET_BLURFX_WINDOW  (w,                                    \
            GET_BLURFX_SCREEN  (w->screen,                            \
                GET_BLURFX_DISPLAY (w->screen->display)))

#define BLURFX_WINDOW(w)                                       \
    BlurfxWindow *bw = BLURFX_WINDOW_PTR(w)


#define WIN_X(w) ((w)->attrib.x - (w)->output.left)
#define WIN_Y(w) ((w)->attrib.y - (w)->output.top)
#define WIN_W(w) ((w)->width + (w)->output.left + (w)->output.right)
#define WIN_H(w) ((w)->height + (w)->output.top + (w)->output.bottom)
#define WIN_XO(w) ((w)->attrib.x - (w)->input.left)
#define WIN_YO(w) ((w)->attrib.y - (w)->input.top)
#define WIN_WO(w) ((w)->width + (w)->input.left + (w)->input.right)
#define WIN_HO(w) ((w)->height + (w)->input.top + (w)->input.bottom)

#define WINDOW_INPUT_INVISIBLE(w)                                    \
    ((w)->attrib.map_state != IsViewable                    || \
     (!(w)->damaged)                                        || \
     (w)->attrib.x + (w)->width  + (w)->input.right  <= 0  || \
     (w)->attrib.y + (w)->height + (w)->input.bottom <= 0  || \
     (w)->attrib.x - (w)->input.left >= (w)->screen->width || \
     (w)->attrib.y - (w)->input.top >= (w)->screen->height)


#define BFX_ADD_RECT(data, m, x1, y1, x2, y2)  \
    *(data)++ = COMP_TEX_COORD_X (&m, x1); \
*(data)++ = COMP_TEX_COORD_Y (&m, y2); \
*(data)++ = (x1);                      \
*(data)++ = (y2);                      \
*(data)++ = COMP_TEX_COORD_X (&m, x2); \
*(data)++ = COMP_TEX_COORD_Y (&m, y2); \
*(data)++ = (x2);                      \
*(data)++ = (y2);                      \
*(data)++ = COMP_TEX_COORD_X (&m, x2); \
*(data)++ = COMP_TEX_COORD_Y (&m, y1); \
*(data)++ = (x2);                      \
*(data)++ = (y1);                      \
*(data)++ = COMP_TEX_COORD_X (&m, x1); \
*(data)++ = COMP_TEX_COORD_Y (&m, y1); \
*(data)++ = (x1);                      \
*(data)++ = (y1)

#ifdef GL_DEBUG
static GLenum gl_error;
#define GLERR  gl_error=glGetError(); if (gl_error !=  GL_NO_ERROR) { fprintf (stderr,"GL error 0x%X has occured at %s:%d\n",gl_error,__FILE__,__LINE__); }
#else
#define GLERR
#endif

#define BLURFX_DISPLAY_OPTION_MOTION_BLUR_TOGGLE                        0
#define BLURFX_DISPLAY_OPTION_NUM                                       1

#define BLURFX_DISPLAY_OPTION_MOTION_BLUR_TOGGLE_KEY_DEFAULT            "F12"
#define BLURFX_DISPLAY_OPTION_MOTION_BLUR_TOGGLE_MOD_DEFAULT            ControlMask

#define BLURFX_SCREEN_OPTION_BLUR_WINDOWS                               0
#define BLURFX_SCREEN_OPTION_BLUR_DECORATION                            1
#define BLURFX_SCREEN_OPTION_REFLECTION_WINDOWS                         2
#define BLURFX_SCREEN_OPTION_REFLECTION_DECORATION                      3
#define BLURFX_SCREEN_OPTION_BLUR_ON_TRANSFORMED_SCREEN                 6
#define BLURFX_SCREEN_OPTION_BLUR_TRANSFORMED_WINDOW                    5
#define BLURFX_SCREEN_OPTION_BLUR_SHADER                                4
#define BLURFX_SCREEN_OPTION_FORCE_NON_FBO_BLUR                         7
#define BLURFX_SCREEN_OPTION_NON_FBO_BLUR_STRENGTH                      8
#define BLURFX_SCREEN_OPTION_DISABLE_BLUR_ON_SCREENGRAB_OF              9
#define BLURFX_SCREEN_OPTION_REFLECTION_ON_TRANSFORMED_SCREEN           13
#define BLURFX_SCREEN_OPTION_REFLECTION_TRANSFORMED_WINDOW              11
#define BLURFX_SCREEN_OPTION_DISABLE_REFLECTION_ON_SCREENGRAB_OF        12
#define BLURFX_SCREEN_OPTION_REFLECTION_FILE                            10
#define BLURFX_SCREEN_OPTION_REFLECTION_SCALE                           14
#define BLURFX_SCREEN_OPTION_REFLECTION_PROPORTIONAL                    15
#define BLURFX_SCREEN_OPTION_REFLECTION_USE_IMAGE_COLOR                 16
#define BLURFX_SCREEN_OPTION_REFLECTION_USE_IMAGE_ALPHA                 17
#define BLURFX_SCREEN_OPTION_MOTION_BLUR_MODE                           18
#define BLURFX_SCREEN_OPTION_MOTION_BLUR_ON_SCREENGRAB_OF               19
#define BLURFX_SCREEN_OPTION_MOTION_BLUR_STRENGTH                       20
#define BLURFX_SCREEN_OPTION_MOTION_BLUR_ON_TRANSFORMED_SCREEN          21
#define BLURFX_SCREEN_OPTION_BLUR_CACHE_TEXTURES                        22
#define BLURFX_SCREEN_OPTION_NO_BLUR_CACHE_ON_TRANSFORMED_SCREEN        23
#define BLURFX_SCREEN_OPTION_DISABLE_DECORATION_ALPHADEP                24
#define BLURFX_SCREEN_OPTION_DISABLE_BLUR_WINDOW_TYPE                   25
#define BLURFX_SCREEN_OPTION_DISABLE_REFLECTION_WINDOW_TYPE             26
#define BLURFX_SCREEN_OPTION_BLUR_SATURATION                            27
#define BLURFX_SCREEN_OPTION_WARNING					28

#define BLURFX_SCREEN_OPTION_NUM                                        29

#define BLURFX_SCREEN_OPTION_BLUR_WINDOWS_DEFAULT                       TRUE
#define BLURFX_SCREEN_OPTION_BLUR_DECORATION_DEFAULT                    TRUE
#define BLURFX_SCREEN_OPTION_REFLECTION_WINDOWS_DEFAULT                 TRUE
#define BLURFX_SCREEN_OPTION_REFLECTION_DECORATION_DEFAULT              TRUE
#define BLURFX_SCREEN_OPTION_BLUR_SHADER_DEFAULT                        "gaussian 5x5"
#define BLURFX_SCREEN_OPTION_BLUR_ON_TRANSFORMED_SCREEN_DEFAULT         FALSE
#define BLURFX_SCREEN_OPTION_BLUR_TRANSFORMED_WINDOW_DEFAULT            FALSE
#define BLURFX_SCREEN_OPTION_REFLECTION_ON_TRANSFORMED_SCREEN_DEFAULT   TRUE
#define BLURFX_SCREEN_OPTION_REFLECTION_TRANSFORMED_WINDOW_DEFAULT      TRUE
#define BLURFX_SCREEN_OPTION_REFLECTION_FILE_DEFAULT                    ""
#define BLURFX_SCREEN_OPTION_REFLECTION_SCALE_DEFAULT                   FALSE
#define BLURFX_SCREEN_OPTION_REFLECTION_PROPORTIONAL_DEFAULT            TRUE
#define BLURFX_SCREEN_OPTION_REFLECTION_USE_IMAGE_COLOR_DEFAULT         FALSE
#define BLURFX_SCREEN_OPTION_REFLECTION_USE_IMAGE_ALPHA_DEFAULT         FALSE
#define BLURFX_SCREEN_OPTION_MOTION_BLUR_MODE_DEFAULT                   "simple"
#define BLURFX_SCREEN_OPTION_MOTION_BLUR_STRENGTH_DEFAULT               20.0
#define BLURFX_SCREEN_OPTION_MOTION_BLUR_ON_TRANSFORMED_SCREEN_DEFAULT  FALSE
#define BLURFX_SCREEN_OPTION_BLUR_CACHE_TEXTURES_DEFAULT                TRUE
#define BLURFX_SCREEN_OPTION_NO_BLUR_CACHE_ON_TRANSFORMED_SCREEN_DEFAULT	FALSE
#define BLURFX_SCREEN_OPTION_FORCE_NON_FBO_BLUR_DEFAULT                 FALSE
#define BLURFX_SCREEN_OPTION_NON_FBO_BLUR_STRENGTH_DEFAULT              4
#define BLURFX_SCREEN_OPTION_DISABLE_DECORATION_ALPHADEP_DEFAULT        FALSE
#define BLURFX_SCREEN_OPTION_BLUR_SATURATION_DEFAULT                    100.0


#define MODE_NORMAL             0
#define MODE_BLURREFLECTION     1

static char *blurDisable[] = { "switcher" };
static char *mBlurModes[] = { N_("simple"), N_("accum"), N_("fbo") };
static char *blurShaderNames[] = { N_("gaussian 5x5"), N_("linear 5x5"), N_("gaussian 9x9"),
                                   N_("linear 9x9"), N_("gaussian 13x13"), N_("linear 13x13"),
                                   N_("gaussian 17x17"), N_("linear 17x17"), N_("gaussian 21x21"),
                                   N_("linear 21x21")};
static const char *blurShader[10][2];

#define LIST_SIZE(l) (sizeof (l) / sizeof (l[0]))

#define NUM_OPTIONS(s) (sizeof ((s)->opt) / sizeof (CompOption))

#define DISABLE_FEATURE(x,y) (IPCS_IsSet(IPCS_OBJECT(x),y) && IPCS_GetBool(IPCS_OBJECT(x),y))

static int displayPrivateIndex = 0;

typedef struct _BlurfxDisplay
{
    int                     screenPrivateIndex;
    CompOption              opt[BLURFX_DISPLAY_OPTION_NUM];
}BlurfxDisplay;

// our vertex array container
typedef struct _BlurfxVertArray
{
    GLfloat*                vertices;
    GLushort*               indices;
    int                     vCount;
    int                     indexCount;
    int                     vertexSize;
    int                     indexSize;

}BlurfxVertArray;

// our texture container
typedef struct _BlurTexture
{
    int                     x;
    int                     y;
    int                     width;
    int                     height;
    unsigned int            handle;
    GLenum                  active_filter;
    unsigned int            target;
    float                   downSample;

}BlurTexture;

typedef struct _BlurfxScreen
{
    int                     hasInit;           // set to one once initiliazed
    BlurTexture             backTex;           // texture which contains the background
    BlurTexture             motionTex;         // texture that stores the motion blurred screen
    BlurTexture             blurTempTexV;      // temporary texture for blur effect
    BlurTexture             blurTempTexH;      // temporary texture for blur effect
    BlurTexture             modTex;            // reflection effect texture
    BlurfxVertArray         vertArray;         // temporary vertex array

    int                     output;            // current output device

    unsigned int            mode;              // actual drawing mode

    unsigned int            fbo;               // framebuffer object for render to texture operations
    unsigned int            fboStatus;
    Bool                    fboActive;

    unsigned int            blurShaderV;       // fragment program handle
    unsigned int            blurShaderH;       // fragment program handle

    // functions that we will intercept
    PreparePaintScreenProc      preparePaintScreen;
    PaintScreenProc             paintScreen;
    PaintTransformedScreenProc  paintTransformedScreen;
    DrawWindowTextureProc       drawWindowTexture;
    DrawWindowProc             drawWindow;
    DamageWindowRectProc        damageWindowRect;
    AddWindowGeometryProc       addWindowGeometry;

    int                     windowPrivateIndex;

    Region                  screenDamage;      // region to calculate damage
    Region                  realPaintRegion;   // actual paint region

    Region                  blurredRegion;     // already blurred region

    Bool                    was_transformed;

    Bool                    paintingSwitcher;

    Bool                    motion_blur_active;
    unsigned int            mb_mode;           // motion blur mode
    Bool                    mb_update;         // is an update of the motion blut texture needed
    float                   mb_alpha;          // motion blur blending value
    float                   mb_timer;          // motion blur fadeout time
    Bool                    mb_activated;

    float                   downSample;       // down sample rate for non FBO mode

    unsigned int            noBlurWMask;       // window types we disable blur
    unsigned int            noReflectionWMask; // window types we disable reflection

    int                     blur_shader;

    // hardware support flags
    Bool                    blur_supported;
    Bool                    fboBlur_supported;
    Bool                    mblur_supported;
    Bool                    reflection_supported;

    int                     ipcs_disable_blur;
    int                     ipcs_disable_mblur;
    int                     ipcs_disable_reflection;

    CompOption              opt[BLURFX_SCREEN_OPTION_NUM]; // options

}BlurfxScreen;

typedef struct _BlurfxWindow
{
    // last position and scale
    int                     lastX;
    int                     lastY;
    WindowPaintAttrib       lastPAttrib;

    Region                  paintRegion;       // actual paint region
    Region                  texDamage;         // blur cache texture damage
    Region                  damageRegion;      // window damage
    BlurTexture             blurTex;           // blur cache texture
    Region                  bTexRegion;        // blur cache texture damage
    Bool                    hasTexture;        // is blur cache texture initialized?
    BlurfxVertArray         vertArray;         // temprary vertex array
    BlurfxVertArray         decoArray;         // decoration without shadow array
    CompWindow              *my_next;          // next window
    Bool                    texUpdated;        // is blur cache texture up to date
    int                     bc_x;              // blur_cache texture viewport
    int                     bc_y;              // blur_cache texture viewport

    Bool                    isSwitcher;        // is this the switcher window

    int                     ipcs_disable_blur;
    int                     ipcs_disable_reflection;

	CompTransform			mTransform;

}BlurfxWindow;


static Bool blurfxInit (CompPlugin *p);
static void blurfxFini (CompPlugin *p);
static Bool blurfxInitDisplay (CompPlugin  *p, CompDisplay *d);
static void blurfxFiniDisplay (CompPlugin *p, CompDisplay *d);
static Bool blurfxInitScreen (CompPlugin *p, CompScreen *s);
static void blurfxFiniScreen (CompPlugin *p, CompScreen *s);
static Bool blurfxInitWindow (CompPlugin *p, CompWindow *w);
static void blurfxFiniWindow (CompPlugin *p, CompWindow *w);
static CompOption* blurfxGetDisplayOptions (CompDisplay *display, int *count);
static Bool blurfxSetDisplayOption (CompDisplay *display, char *name, CompOptionValue *value);
static void blurfxDisplayInitOptions (BlurfxDisplay *bd);
static Bool blurfxSetScreenOption (CompScreen *s, char *name, CompOptionValue *value);
static CompOption* blurfxGetScreenOptions (CompScreen *s, int *count);
static void blurfxScreenInitOptions (BlurfxScreen *bs);
static void blurfxPreparePaintScreen (CompScreen *s, int ms);
static Bool blurfxPaintScreen(CompScreen *s, const ScreenPaintAttrib *sa, const CompTransform *transform, Region region, int output, unsigned int mask);
static void blurfxPaintTransformedScreen(CompScreen *s, const ScreenPaintAttrib
*sa, const CompTransform *transform, Region region, int output, unsigned int mask);
static Bool blurfxDrawWindow (CompWindow *w,  const CompTransform *transform, const FragmentAttrib *attrib,
Region region, unsigned int mask);
static void blurfxDrawWindowTexture(CompWindow *w,CompTexture *texture, const FragmentAttrib *fAttrib, unsigned int mask);
static void blurfxAddWindowGeometry (CompWindow *w, CompMatrix *m, int nM, Region region, Region clip);
static Bool blurfxDamageWindowRect (CompWindow *w, Bool initial, BoxPtr box);
static void updateBlur(CompWindow *w, CompScreen *s, unsigned int mask, CompTextureFilter filter);
static void updateBlurTexture(CompWindow *w, CompScreen *s, unsigned int mask, CompTextureFilter filter);
static void updateBlurTextureSize(CompWindow *w, CompScreen *s, unsigned int mask);
static void updateBlurNoFBO(CompWindow *w, CompScreen *s, unsigned int mask);
static void updateBlurTextureNoFBO(CompWindow *w, CompScreen *s, unsigned int mask);
static void drawBlur(CompWindow *w, CompScreen *s, CompTexture *texture, const FragmentAttrib    *attrib, int mask, CompTextureFilter filter);
static void drawReflection(CompWindow *w, CompScreen *s, CompTexture *texture, const FragmentAttrib    *attrib, int mask, CompTextureFilter filter);
static Bool blurfxToggleMotionBlur (CompDisplay *d, CompAction *ac, CompActionState state, CompOption *option, int nOption);
static Bool bindFbo(CompScreen *s, BlurTexture tex);
static void unbindFbo(CompScreen *s);
static void genGeometry (BlurfxVertArray *vA, CompMatrix matrix, int xextend,Region region);
static Bool moreVertices (BlurfxVertArray *vA, int newSize);
static void initBlurfxScreen(BlurfxScreen* bs,int Screenwidth,int Screenheight,CompScreen* s);
static void genBlurTexture(BlurfxScreen *bs,BlurTexture *tex,int width,int height,int type);
static void loadShader(GLenum type,CompScreen* s, GLuint * shader, const char * prog);
static void loadPngToTexture2D(CompScreen *s, BlurTexture * tex, char *filename);
static void enableBlurfxTexture(BlurTexture* tex, CompTextureFilter filter);
static void switchBlurfxTexture(BlurTexture* from, BlurTexture* to, CompTextureFilter filter);
static void disableBlurfxTexture(BlurTexture* tex);

CompPluginDep blurfxDeps[] = {
    {CompPluginRuleAfterCategory, "imageformat"},
    {CompPluginRuleEnd, ""}
};

CompPluginVTable blurfxVTable = {
    "blurfx",
    N_("Blur effects"),
    N_("Blur and reflection effects"),
    blurfxInit,
    blurfxFini,
    blurfxInitDisplay,
    blurfxFiniDisplay,
    blurfxInitScreen,
    blurfxFiniScreen,
    blurfxInitWindow,
    blurfxFiniWindow,
    blurfxGetDisplayOptions,
    blurfxSetDisplayOption,
    blurfxGetScreenOptions,
    blurfxSetScreenOption,
    blurfxDeps,
    sizeof (blurfxDeps) / sizeof(blurfxDeps[0]),
    0,
    0,
    BERYL_ABI_INFO,
    "beryl-plugins",
	"effects",
	0,
	0,
	False,
};

#endif