/*
 * Copyright (c) 2007 Ivan Leben
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library in the file COPYING;
 * if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#pragma once

#define OPENVG_VERSION_1_0_1 1

/* Type definitions */
/* TODO: we can't use config.h in this header so there
   must be some other technique to assert the proper
   size of the basic types */

typedef float VGfloat;
typedef char VGbyte;
typedef unsigned char VGubyte;
typedef short VGshort;
typedef int VGint;
typedef unsigned int VGuint;
typedef unsigned int VGbitfield;

typedef enum {
    VG_FALSE = 0,
    VG_TRUE  = 1
} VGboolean;

#define VG_MAXSHORT ((VGshort)((~((unsigned)0)) >> 1))
#define VG_MAXINT ((VGint)((~((unsigned)0)) >> 1))

/* Define handle to be of same length as any pointer */

typedef void* VGHandle;
#define VG_INVALID_HANDLE ((VGHandle)NULL)

/* Enumerations */

typedef enum {
    VG_NO_ERROR                         = 0,
    VG_BAD_HANDLE_ERROR                 = 0x1000,
    VG_ILLEGAL_ARGUMENT_ERROR           = 0x1001,
    VG_OUT_OF_MEMORY_ERROR              = 0x1002,
    VG_PATH_CAPABILITY_ERROR            = 0x1003,
    VG_UNSUPPORTED_IMAGE_FORMAT_ERROR   = 0x1004,
    VG_UNSUPPORTED_PATH_FORMAT_ERROR    = 0x1005,
    VG_IMAGE_IN_USE_ERROR               = 0x1006,
    VG_NO_CONTEXT_ERROR                 = 0x1007
} VGErrorCode;

typedef enum {
    /* Mode settings */
    VG_MATRIX_MODE          = 0x1100,
    VG_FILL_RULE            = 0x1101,
    VG_IMAGE_QUALITY        = 0x1102,
    VG_RENDERING_QUALITY    = 0x1103,
    VG_BLEND_MODE           = 0x1104,
    VG_IMAGE_MODE           = 0x1105,

    /* Scissoring rectangles */
    VG_SCISSOR_RECTS = 0x1106,

    /* Stroke parameters */
    VG_STROKE_LINE_WIDTH        = 0x1110,
    VG_STROKE_CAP_STYLE         = 0x1111,
    VG_STROKE_JOIN_STYLE        = 0x1112,
    VG_STROKE_MITER_LIMIT       = 0x1113,
    VG_STROKE_DASH_PATTERN      = 0x1114,
    VG_STROKE_DASH_PHASE        = 0x1115,
    VG_STROKE_DASH_PHASE_RESET  = 0x1116,

    /* Edge fill color for VG_TILE_FILL tiling mode */
    VG_TILE_FILL_COLOR = 0x1120,

    /* Color for vgClear */
    VG_CLEAR_COLOR = 0x1121,

    /* Enable/disable alpha masking and scissoring */
    VG_MASKING      = 0x1130,
    VG_SCISSORING   = 0x1131,

    /* Pixel layout information */
    VG_PIXEL_LAYOUT     = 0x1140,
    VG_SCREEN_LAYOUT    = 0x1141,

    /* Source format selection for image filters */
    VG_FILTER_FORMAT_LINEAR         = 0x1150,
    VG_FILTER_FORMAT_PREMULTIPLIED  = 0x1151,

    /* Destination write enable mask for image filters */
    VG_FILTER_CHANNEL_MASK = 0x1152,

    /* Implementation limits (read-only) */
    VG_MAX_SCISSOR_RECTS            = 0x1160,
    VG_MAX_DASH_COUNT               = 0x1161,
    VG_MAX_KERNEL_SIZE              = 0x1162,
    VG_MAX_SEPARABLE_KERNEL_SIZE    = 0x1163,
    VG_MAX_COLOR_RAMP_STOPS         = 0x1164,
    VG_MAX_IMAGE_WIDTH              = 0x1165,
    VG_MAX_IMAGE_HEIGHT             = 0x1166,
    VG_MAX_IMAGE_PIXELS             = 0x1167,
    VG_MAX_IMAGE_BYTES              = 0x1168,
    VG_MAX_FLOAT                    = 0x1169,
    VG_MAX_GAUSSIAN_STD_DEVIATION   = 0x116A
} VGParamType;

typedef enum {
    VG_RENDERING_QUALITY_NONANTIALIASED     = 0x1200,
    VG_RENDERING_QUALITY_FASTER             = 0x1201,
    VG_RENDERING_QUALITY_BETTER             = 0x1202 /* Default */
} VGRenderingQuality;

typedef enum {
    VG_PIXEL_LAYOUT_UNKNOWN         = 0x1300,
    VG_PIXEL_LAYOUT_RGB_VERTICAL    = 0x1301,
    VG_PIXEL_LAYOUT_BGR_VERTICAL    = 0x1302,
    VG_PIXEL_LAYOUT_RGB_HORIZONTAL  = 0x1303,
    VG_PIXEL_LAYOUT_BGR_HORIZONTAL  = 0x1304
} VGPixelLayout;

typedef enum {
    VG_MATRIX_PATH_USER_TO_SURFACE  = 0x1400,
    VG_MATRIX_IMAGE_USER_TO_SURFACE = 0x1401,
    VG_MATRIX_FILL_PAINT_TO_USER    = 0x1402,
    VG_MATRIX_STROKE_PAINT_TO_USER  = 0x1403
} VGMatrixMode;

typedef enum {
    VG_CLEAR_MASK       = 0x1500,
    VG_FILL_MASK        = 0x1501,
    VG_SET_MASK         = 0x1502,
    VG_UNION_MASK       = 0x1503,
    VG_INTERSECT_MASK   = 0x1504,
    VG_SUBTRACT_MASK    = 0x1505
} VGMaskOperation;

#define VG_PATH_FORMAT_STANDARD 0

typedef enum {
    VG_PATH_DATATYPE_S_8    = 0,
    VG_PATH_DATATYPE_S_16   = 1,
    VG_PATH_DATATYPE_S_32   = 2,
    VG_PATH_DATATYPE_F      = 3
} VGPathDatatype;

typedef enum {
    VG_ABSOLUTE = 0,
    VG_RELATIVE = 1
} VGPathAbsRel;

typedef enum {
    VG_CLOSE_PATH   = (0 << 1),
    VG_MOVE_TO      = (1 << 1),
    VG_LINE_TO      = (2 << 1),
    VG_HLINE_TO     = (3 << 1),
    VG_VLINE_TO     = (4 << 1),
    VG_QUAD_TO      = (5 << 1),
    VG_CUBIC_TO     = (6 << 1),
    VG_SQUAD_TO     = (7 << 1),
    VG_SCUBIC_TO    = (8 << 1),
    VG_SCCWARC_TO   = (9 << 1),
    VG_SCWARC_TO    = (10 << 1),
    VG_LCCWARC_TO   = (11 << 1),
    VG_LCWARC_TO    = (12 << 1)
} VGPathSegment;

typedef enum {
    VG_MOVE_TO_ABS      = VG_MOVE_TO    | VG_ABSOLUTE,
    VG_MOVE_TO_REL      = VG_MOVE_TO    | VG_RELATIVE,
    VG_LINE_TO_ABS      = VG_LINE_TO    | VG_ABSOLUTE,
    VG_LINE_TO_REL      = VG_LINE_TO    | VG_RELATIVE,
    VG_HLINE_TO_ABS     = VG_HLINE_TO   | VG_ABSOLUTE,
    VG_HLINE_TO_REL     = VG_HLINE_TO   | VG_RELATIVE,
    VG_VLINE_TO_ABS     = VG_VLINE_TO   | VG_ABSOLUTE,
    VG_VLINE_TO_REL     = VG_VLINE_TO   | VG_RELATIVE,
    VG_QUAD_TO_ABS      = VG_QUAD_TO    | VG_ABSOLUTE,
    VG_QUAD_TO_REL      = VG_QUAD_TO    | VG_RELATIVE,
    VG_CUBIC_TO_ABS     = VG_CUBIC_TO   | VG_ABSOLUTE,
    VG_CUBIC_TO_REL     = VG_CUBIC_TO   | VG_RELATIVE,
    VG_SQUAD_TO_ABS     = VG_SQUAD_TO   | VG_ABSOLUTE,
    VG_SQUAD_TO_REL     = VG_SQUAD_TO   | VG_RELATIVE,
    VG_SCUBIC_TO_ABS    = VG_SCUBIC_TO  | VG_ABSOLUTE,
    VG_SCUBIC_TO_REL    = VG_SCUBIC_TO  | VG_RELATIVE,
    VG_SCCWARC_TO_ABS   = VG_SCCWARC_TO | VG_ABSOLUTE,
    VG_SCCWARC_TO_REL   = VG_SCCWARC_TO | VG_RELATIVE,
    VG_SCWARC_TO_ABS    = VG_SCWARC_TO  | VG_ABSOLUTE,
    VG_SCWARC_TO_REL    = VG_SCWARC_TO  | VG_RELATIVE,
    VG_LCCWARC_TO_ABS   = VG_LCCWARC_TO | VG_ABSOLUTE,
    VG_LCCWARC_TO_REL   = VG_LCCWARC_TO | VG_RELATIVE,
    VG_LCWARC_TO_ABS    = VG_LCWARC_TO  | VG_ABSOLUTE,
    VG_LCWARC_TO_REL    = VG_LCWARC_TO  | VG_RELATIVE
} VGPathCommand;

typedef VGHandle VGPath;

typedef enum {
    VG_PATH_CAPABILITY_APPEND_FROM              = (1 << 0),
    VG_PATH_CAPABILITY_APPEND_TO                = (1 << 1),
    VG_PATH_CAPABILITY_MODIFY                   = (1 << 2),
    VG_PATH_CAPABILITY_TRANSFORM_FROM           = (1 << 3),
    VG_PATH_CAPABILITY_TRANSFORM_TO             = (1 << 4),
    VG_PATH_CAPABILITY_INTERPOLATE_FROM         = (1 << 5),
    VG_PATH_CAPABILITY_INTERPOLATE_TO           = (1 << 6),
    VG_PATH_CAPABILITY_PATH_LENGTH              = (1 << 7),
    VG_PATH_CAPABILITY_POINT_ALONG_PATH         = (1 << 8),
    VG_PATH_CAPABILITY_TANGENT_ALONG_PATH       = (1 << 9),
    VG_PATH_CAPABILITY_PATH_BOUNDS              = (1 << 10),
    VG_PATH_CAPABILITY_PATH_TRANSFORMED_BOUNDS  = (1 << 11),
    VG_PATH_CAPABILITY_ALL                      = (1 << 12) - 1
} VGPathCapabilities;

typedef enum {
    VG_PATH_FORMAT          = 0x1600,
    VG_PATH_DATATYPE        = 0x1601,
    VG_PATH_SCALE           = 0x1602,
    VG_PATH_BIAS            = 0x1603,
    VG_PATH_NUM_SEGMENTS    = 0x1604,
    VG_PATH_NUM_COORDS      = 0x1605
} VGPathParamType;

typedef enum {
    VG_CAP_BUTT     = 0x1700,
    VG_CAP_ROUND    = 0x1701,
    VG_CAP_SQUARE   = 0x1702
} VGCapStyle;

typedef enum {
    VG_JOIN_MITER = 0x1800,
    VG_JOIN_ROUND = 0x1801,
    VG_JOIN_BEVEL = 0x1802
} VGJoinStyle;

typedef enum {
    VG_EVEN_ODD = 0x1900,
    VG_NON_ZERO = 0x1901
} VGFillRule;

typedef enum {
    VG_STROKE_PATH  = (1 << 0),
    VG_FILL_PATH    = (1 << 1)
} VGPaintMode;

typedef VGHandle VGPaint;

typedef enum {
    /* Color paint parameters */
    VG_PAINT_TYPE                       = 0x1A00,
    VG_PAINT_COLOR                      = 0x1A01,
    VG_PAINT_COLOR_RAMP_SPREAD_MODE     = 0x1A02,
    VG_PAINT_COLOR_RAMP_PREMULTIPLIED   = 0x1A07,
    VG_PAINT_COLOR_RAMP_STOPS           = 0x1A03,

    /* Linear gradient paint parameters */
    VG_PAINT_LINEAR_GRADIENT = 0x1A04,

    /* Radial gradient paint parameters */
    VG_PAINT_RADIAL_GRADIENT = 0x1A05,

    /* Pattern paint parameters */
    VG_PAINT_PATTERN_TILING_MODE = 0x1A06
} VGPaintParamType;

typedef enum {
    VG_PAINT_TYPE_COLOR             = 0x1B00,
    VG_PAINT_TYPE_LINEAR_GRADIENT   = 0x1B01,
    VG_PAINT_TYPE_RADIAL_GRADIENT   = 0x1B02,
    VG_PAINT_TYPE_PATTERN           = 0x1B03
} VGPaintType;

typedef enum {
    VG_COLOR_RAMP_SPREAD_PAD        = 0x1C00,
    VG_COLOR_RAMP_SPREAD_REPEAT     = 0x1C01,
    VG_COLOR_RAMP_SPREAD_REFLECT    = 0x1C02
} VGColorRampSpreadMode;

typedef enum {
    VG_TILE_FILL        = 0x1D00,
    VG_TILE_PAD         = 0x1D01,
    VG_TILE_REPEAT      = 0x1D02,
    VG_TILE_REFLECT     = 0x1D03
} VGTilingMode;

typedef enum {
    /* RGB{A,X} channel ordering */
    VG_sRGBX_8888       = 0,
    VG_sRGBA_8888       = 1,
    VG_sRGBA_8888_PRE   = 2,
    VG_sRGB_565         = 3,
    VG_sRGBA_5551       = 4,
    VG_sRGBA_4444       = 5,
    VG_sL_8             = 6,
    VG_lRGBX_8888       = 7,
    VG_lRGBA_8888       = 8,
    VG_lRGBA_8888_PRE   = 9,
    VG_lL_8             = 10,
    VG_A_8              = 11,
    VG_BW_1             = 12,

    /* {A,X}RGB channel ordering */
    VG_sXRGB_8888       = 0 | (1 << 6),
    VG_sARGB_8888       = 1 | (1 << 6),
    VG_sARGB_8888_PRE   = 2 | (1 << 6),
    VG_sARGB_1555       = 4 | (1 << 6),
    VG_sARGB_4444       = 5 | (1 << 6),
    VG_lXRGB_8888       = 7 | (1 << 6),
    VG_lARGB_8888       = 8 | (1 << 6),
    VG_lARGB_8888_PRE   = 9 | (1 << 6),

    /* BGR{A,X} channel ordering */
    VG_sBGRX_8888       = 0 | (1 << 7),
    VG_sBGRA_8888       = 1 | (1 << 7),
    VG_sBGRA_8888_PRE   = 2 | (1 << 7),
    VG_sBGR_565         = 3 | (1 << 7),
    VG_sBGRA_5551       = 4 | (1 << 7),
    VG_sBGRA_4444       = 5 | (1 << 7),
    VG_lBGRX_8888       = 7 | (1 << 7),
    VG_lBGRA_8888       = 8 | (1 << 7),
    VG_lBGRA_8888_PRE   = 9 | (1 << 7),

    /* {A,X}BGR channel ordering */
    VG_sXBGR_8888       = 0 | (1 << 6) | (1 << 7),
    VG_sABGR_8888       = 1 | (1 << 6) | (1 << 7),
    VG_sABGR_8888_PRE   = 2 | (1 << 6) | (1 << 7),
    VG_sABGR_1555       = 4 | (1 << 6) | (1 << 7),
    VG_sABGR_4444       = 5 | (1 << 6) | (1 << 7),
    VG_lXBGR_8888       = 7 | (1 << 6) | (1 << 7),
    VG_lABGR_8888       = 8 | (1 << 6) | (1 << 7),
    VG_lABGR_8888_PRE   = 9 | (1 << 6) | (1 << 7)
} VGImageFormat;

typedef VGHandle VGImage;

typedef enum {
    VG_IMAGE_QUALITY_NONANTIALIASED = (1 << 0),
    VG_IMAGE_QUALITY_FASTER         = (1 << 1),
    VG_IMAGE_QUALITY_BETTER         = (1 << 2)
} VGImageQuality;

typedef enum {
    VG_IMAGE_FORMAT = 0x1E00,
    VG_IMAGE_WIDTH  = 0x1E01,
    VG_IMAGE_HEIGHT = 0x1E02
} VGImageParamType;

typedef enum {
    VG_DRAW_IMAGE_NORMAL    = 0x1F00,
    VG_DRAW_IMAGE_MULTIPLY  = 0x1F01,
    VG_DRAW_IMAGE_STENCIL   = 0x1F02
} VGImageMode;

typedef enum {
    VG_RED      = (1 << 3),
    VG_GREEN    = (1 << 2),
    VG_BLUE     = (1 << 1),
    VG_ALPHA    = (1 << 0)
} VGImageChannel;

typedef enum {
    VG_BLEND_SRC            = 0x2000,
    VG_BLEND_SRC_OVER       = 0x2001,
    VG_BLEND_DST_OVER       = 0x2002,
    VG_BLEND_SRC_IN         = 0x2003,
    VG_BLEND_DST_IN         = 0x2004,
    VG_BLEND_MULTIPLY       = 0x2005,
    VG_BLEND_SCREEN         = 0x2006,
    VG_BLEND_DARKEN         = 0x2007,
    VG_BLEND_LIGHTEN        = 0x2008,
    VG_BLEND_ADDITIVE       = 0x2009,
    VG_BLEND_SRC_OUT_SH     = 0x200A,
    VG_BLEND_DST_OUT_SH     = 0x200B,
    VG_BLEND_SRC_ATOP_SH    = 0x200C,
    VG_BLEND_DST_ATOP_SH    = 0x200D
} VGBlendMode;

typedef enum {
    VG_IMAGE_FORMAT_QUERY  = 0x2100,
    VG_PATH_DATATYPE_QUERY = 0x2101
} VGHardwareQueryType;

typedef enum {
    VG_HARDWARE_ACCELERATED   = 0x2200,
    VG_HARDWARE_UNACCELERATED = 0x2201
} VGHardwareQueryResult;

typedef enum {
    VG_VENDOR       = 0x2300,
    VG_RENDERER     = 0x2301,
    VG_VERSION      = 0x2302,
    VG_EXTENSIONS   = 0x2303
} VGStringID;

/* Function Prototypes */

#if 0 /* We are including ShivaVG directly into libSimGearScene and only using
         inside the library so there is no need for any dll import/export stuff */
#if defined(_WIN32) || defined(__VC32__)
#if defined(VG_API_EXPORT)
#define VG_API_CALL __declspec(dllexport)
#else
#define VG_API_CALL __declspec(dllimport)
#endif
#else
#define VG_API_CALL extern
#endif
#else
#define VG_API_CALL
#endif

#if defined(__cplusplus)
extern "C" {
#endif

VG_API_CALL VGErrorCode vgGetError(void);

VG_API_CALL void vgFlush(void);
VG_API_CALL void vgFinish(void);

/* Getters and Setters */
VG_API_CALL void vgSetf(VGParamType type, VGfloat value);
VG_API_CALL void vgSeti(VGParamType type, VGint value);
VG_API_CALL void vgSetfv(VGParamType type, VGint count,
                         const VGfloat* values);
VG_API_CALL void vgSetiv(VGParamType type, VGint count,
                         const VGint* values);

VG_API_CALL VGfloat vgGetf(VGParamType type);
VG_API_CALL VGint vgGeti(VGParamType type);
VG_API_CALL VGint vgGetVectorSize(VGParamType type);
VG_API_CALL void vgGetfv(VGParamType type, VGint count, VGfloat* values);
VG_API_CALL void vgGetiv(VGParamType type, VGint count, VGint* values);

VG_API_CALL void vgSetParameterf(VGHandle object,
                                 VGint paramType,
                                 VGfloat value);
VG_API_CALL void vgSetParameteri(VGHandle object,
                                 VGint paramType,
                                 VGint value);
VG_API_CALL void vgSetParameterfv(VGHandle object,
                                  VGint paramType,
                                  VGint count, const VGfloat* values);
VG_API_CALL void vgSetParameteriv(VGHandle object,
                                  VGint paramType,
                                  VGint count, const VGint* values);

VG_API_CALL VGfloat vgGetParameterf(VGHandle object,
                                    VGint paramType);
VG_API_CALL VGint vgGetParameteri(VGHandle object,
                                  VGint paramType);
VG_API_CALL VGint vgGetParameterVectorSize(VGHandle object,
                                           VGint paramType);
VG_API_CALL void vgGetParameterfv(VGHandle object,
                                  VGint paramType,
                                  VGint count, VGfloat* values);
VG_API_CALL void vgGetParameteriv(VGHandle object,
                                  VGint paramType,
                                  VGint count, VGint* values);

/* Matrix Manipulation */
VG_API_CALL void vgLoadIdentity(void);
VG_API_CALL void vgLoadMatrix(const VGfloat* m);
VG_API_CALL void vgGetMatrix(VGfloat* m);
VG_API_CALL void vgMultMatrix(const VGfloat* m);
VG_API_CALL void vgTranslate(VGfloat tx, VGfloat ty);
VG_API_CALL void vgScale(VGfloat sx, VGfloat sy);
VG_API_CALL void vgShear(VGfloat shx, VGfloat shy);
VG_API_CALL void vgRotate(VGfloat angle);

/* Masking and Clearing */
VG_API_CALL void vgMask(VGImage mask, VGMaskOperation operation,
                        VGint x, VGint y, VGint width, VGint height);
VG_API_CALL void vgClear(VGint x, VGint y, VGint width, VGint height);

/* Paths */
VG_API_CALL VGPath vgCreatePath(VGint pathFormat,
                                VGPathDatatype datatype,
                                VGfloat scale, VGfloat bias,
                                VGint segmentCapacityHint,
                                VGint coordCapacityHint,
                                VGbitfield capabilities);
VG_API_CALL void vgClearPath(VGPath path, VGbitfield capabilities);
VG_API_CALL void vgDestroyPath(VGPath path);
VG_API_CALL void vgRemovePathCapabilities(VGPath path,
                                          VGbitfield capabilities);
VG_API_CALL VGbitfield vgGetPathCapabilities(VGPath path);
VG_API_CALL void vgAppendPath(VGPath dstPath, VGPath srcPath);
VG_API_CALL void vgAppendPathData(VGPath dstPath,
                                  VGint numSegments,
                                  const VGubyte* pathSegments,
                                  const void* pathData);
VG_API_CALL void vgModifyPathCoords(VGPath dstPath, VGint startIndex,
                                    VGint numSegments,
                                    const void* pathData);
VG_API_CALL void vgTransformPath(VGPath dstPath, VGPath srcPath);
VG_API_CALL VGboolean vgInterpolatePath(VGPath dstPath,
                                        VGPath startPath,
                                        VGPath endPath,
                                        VGfloat amount);
VG_API_CALL VGfloat vgPathLength(VGPath path,
                                 VGint startSegment, VGint numSegments);
VG_API_CALL void vgPointAlongPath(VGPath path,
                                  VGint startSegment, VGint numSegments,
                                  VGfloat distance,
                                  VGfloat* x, VGfloat* y,
                                  VGfloat* tangentX, VGfloat* tangentY);
VG_API_CALL void vgPathBounds(VGPath path,
                              VGfloat* minX, VGfloat* minY,
                              VGfloat* width, VGfloat* height);
VG_API_CALL void vgPathTransformedBounds(VGPath path,
                                         VGfloat* minX, VGfloat* minY,
                                         VGfloat* width, VGfloat* height);
VG_API_CALL void vgDrawPath(VGPath path, VGbitfield paintModes);

/* Paint */
VG_API_CALL VGPaint vgCreatePaint(void);
VG_API_CALL void vgDestroyPaint(VGPaint paint);
VG_API_CALL void vgSetPaint(VGPaint paint, VGbitfield paintModes);
VG_API_CALL VGPaint vgGetPaint(VGPaintMode paintMode);
VG_API_CALL void vgSetColor(VGPaint paint, VGuint rgba);
VG_API_CALL VGuint vgGetColor(VGPaint paint);
VG_API_CALL void vgPaintPattern(VGPaint paint, VGImage pattern);

/* Images */
VG_API_CALL VGImage vgCreateImage(VGImageFormat format,
                                  VGint width, VGint height,
                                  VGbitfield allowedQuality);
VG_API_CALL void vgDestroyImage(VGImage image);
VG_API_CALL void vgClearImage(VGImage image,
                              VGint x, VGint y, VGint width, VGint height);
VG_API_CALL void vgImageSubData(VGImage image,
                                const void* data, VGint dataStride,
                                VGImageFormat dataFormat,
                                VGint x, VGint y, VGint width, VGint height);
VG_API_CALL void vgGetImageSubData(VGImage image,
                                   void* data, VGint dataStride,
                                   VGImageFormat dataFormat,
                                   VGint x, VGint y,
                                   VGint width, VGint height);
VG_API_CALL VGImage vgChildImage(VGImage parent,
                                 VGint x, VGint y, VGint width, VGint height);
VG_API_CALL VGImage vgGetParent(VGImage image);
VG_API_CALL void vgCopyImage(VGImage dst, VGint dx, VGint dy,
                             VGImage src, VGint sx, VGint sy,
                             VGint width, VGint height,
                             VGboolean dither);
VG_API_CALL void vgDrawImage(VGImage image);
VG_API_CALL void vgSetPixels(VGint dx, VGint dy,
                             VGImage src, VGint sx, VGint sy,
                             VGint width, VGint height);
VG_API_CALL void vgWritePixels(const void* data, VGint dataStride,
                               VGImageFormat dataFormat,
                               VGint dx, VGint dy,
                               VGint width, VGint height);
VG_API_CALL void vgGetPixels(VGImage dst, VGint dx, VGint dy,
                             VGint sx, VGint sy,
                             VGint width, VGint height);
VG_API_CALL void vgReadPixels(void* data, VGint dataStride,
                              VGImageFormat dataFormat,
                              VGint sx, VGint sy,
                              VGint width, VGint height);
VG_API_CALL void vgCopyPixels(VGint dx, VGint dy,
                              VGint sx, VGint sy,
                              VGint width, VGint height);

/* Image Filters */
VG_API_CALL void vgColorMatrix(VGImage dst, VGImage src,
                               const VGfloat* matrix);
VG_API_CALL void vgConvolve(VGImage dst, VGImage src,
                            VGint kernelWidth, VGint kernelHeight,
                            VGint shiftX, VGint shiftY,
                            const VGshort* kernel,
                            VGfloat scale,
                            VGfloat bias,
                            VGTilingMode tilingMode);
VG_API_CALL void vgSeparableConvolve(VGImage dst, VGImage src,
                                     VGint kernelWidth,
                                     VGint kernelHeight,
                                     VGint shiftX, VGint shiftY,
                                     const VGshort* kernelX,
                                     const VGshort* kernelY,
                                     VGfloat scale,
                                     VGfloat bias,
                                     VGTilingMode tilingMode);
VG_API_CALL void vgGaussianBlur(VGImage dst, VGImage src,
                                VGfloat stdDeviationX,
                                VGfloat stdDeviationY,
                                VGTilingMode tilingMode);
VG_API_CALL void vgLookup(VGImage dst, VGImage src,
                          const VGubyte* redLUT,
                          const VGubyte* greenLUT,
                          const VGubyte* blueLUT,
                          const VGubyte* alphaLUT,
                          VGboolean outputLinear,
                          VGboolean outputPremultiplied);
VG_API_CALL void vgLookupSingle(VGImage dst, VGImage src,
                                const VGuint* lookupTable,
                                VGImageChannel sourceChannel,
                                VGboolean outputLinear,
                                VGboolean outputPremultiplied);

/* Hardware Queries */
VG_API_CALL VGHardwareQueryResult vgHardwareQuery(VGHardwareQueryType key,
                                                  VGint setting);

/* Renderer and Extension Information */
VG_API_CALL const VGubyte* vgGetString(VGStringID name);

/* Extensions */

#define OVG_SH_blend_src_out  1
#define OVG_SH_blend_dst_out  1
#define OVG_SH_blend_src_atop 1
#define OVG_SH_blend_dst_atop 1

VG_API_CALL VGboolean vgCreateContextSH(VGint width, VGint height);
VG_API_CALL VGboolean vgHasContextSH();
VG_API_CALL void vgResizeSurfaceSH(VGint width, VGint height);
VG_API_CALL void vgSetModelViewProjectionMatSH(float *mat);
VG_API_CALL void vgDestroyContextSH(void);

/* Extensions for ShaderVG */
#define VG_FRAGMENT_SHADER_SH 0
#define VG_VERTEX_SHADER_SH 1

#define VG_IMAGE_UNIT_OFFSET_SH 2

typedef enum {
    VG_IMAGE_UNIT_0_SH = VG_IMAGE_UNIT_OFFSET_SH,
    VG_IMAGE_UNIT_1_SH,
    VG_IMAGE_UNIT_2_SH,
    VG_IMAGE_UNIT_3_SH,
    VG_IMAGE_UNIT_4_SH
} VGImageUnitSH;

VG_API_CALL void vgShaderSourceSH(VGuint shadertype, const VGbyte* string);
VG_API_CALL void vgCompileShaderSH(void);
VG_API_CALL void vgUniform1fSH(VGint location, VGfloat v0);
VG_API_CALL void vgUniform2fSH(VGint location, VGfloat v0, VGfloat v1);
VG_API_CALL void vgUniform3fSH(VGint location, VGfloat v0, VGfloat v1, VGfloat v2);
VG_API_CALL void vgUniform4fSH(VGint location, VGfloat v0, VGfloat v1, VGfloat v2, VGfloat v3);
VG_API_CALL void vgUniform1fvSH(VGint location, VGint count, const VGfloat* value);
VG_API_CALL void vgUniform2fvSH(VGint location, VGint count, const VGfloat* value);
VG_API_CALL void vgUniform3fvSH(VGint location, VGint count, const VGfloat* value);
VG_API_CALL void vgUniform4fvSH(VGint location, VGint count, const VGfloat* value);
VG_API_CALL void vgUniform1iSH(VGint location, VGint v0);
VG_API_CALL void vgUniform2iSH(VGint location, VGint v0, VGint v1);
VG_API_CALL void vgUniform3iSH(VGint location, VGint v0, VGint v1, VGint v2);
VG_API_CALL void vgUniform4iSH(VGint location, VGint v0, VGint v1, VGint v2, VGint v3);
VG_API_CALL void vgUniform1ivSH(VGint location, VGint count, const VGint* value);
VG_API_CALL void vgUniform2ivSH(VGint location, VGint count, const VGint* value);
VG_API_CALL void vgUniform3ivSH(VGint location, VGint count, const VGint* value);
VG_API_CALL void vgUniform4ivSH(VGint location, VGint count, const VGint* value);
VG_API_CALL void vgUniformMatrix2fvSH(VGint location, VGint count, VGboolean transpose, const VGfloat* value);
VG_API_CALL void vgUniformMatrix3fvSH(VGint location, VGint count, VGboolean transpose, const VGfloat* value);
VG_API_CALL void vgUniformMatrix4fvSH(VGint location, VGint count, VGboolean transpose, const VGfloat* value);
VG_API_CALL void vgBindImageSH(VGImage image, VGImageUnitSH unit);
VG_API_CALL VGint vgGetUniformLocationSH(const VGbyte* name);
VG_API_CALL void vgGetUniformfvSH(VGint location, VGfloat* params);

#if defined(__cplusplus)
} /* extern "C" */
#endif
