/*
 * Copyright 2012 Nikolay Sivov for CodeWeavers
 *
 * 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; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "dwrite_3.h"
#include "d2d1.h"

#include "wine/debug.h"
#include "wine/unicode.h"

static const DWRITE_MATRIX identity =
{
    1.0f, 0.0f,
    0.0f, 1.0f,
    0.0f, 0.0f
};

static inline void *heap_alloc(size_t len)
{
    return HeapAlloc(GetProcessHeap(), 0, len);
}

static inline void *heap_alloc_zero(size_t len)
{
    return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len);
}

static inline void *heap_realloc(void *mem, size_t len)
{
    return HeapReAlloc(GetProcessHeap(), 0, mem, len);
}

static inline void *heap_realloc_zero(void *mem, size_t len)
{
    return HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, mem, len);
}

static inline BOOL heap_free(void *mem)
{
    return HeapFree(GetProcessHeap(), 0, mem);
}

static inline LPWSTR heap_strdupW(const WCHAR *str)
{
    LPWSTR ret = NULL;

    if(str) {
        DWORD size;

        size = (strlenW(str)+1)*sizeof(WCHAR);
        ret = heap_alloc(size);
        if(ret)
            memcpy(ret, str, size);
    }

    return ret;
}

static inline LPWSTR heap_strdupnW(const WCHAR *str, UINT32 len)
{
    WCHAR *ret = NULL;

    if (len)
    {
        ret = heap_alloc((len+1)*sizeof(WCHAR));
        if(ret)
        {
            memcpy(ret, str, len*sizeof(WCHAR));
            ret[len] = 0;
        }
    }

    return ret;
}

static inline const char *debugstr_range(const DWRITE_TEXT_RANGE *range)
{
    return wine_dbg_sprintf("%u:%u", range->startPosition, range->length);
}

static inline const char *debugstr_matrix(const DWRITE_MATRIX *m)
{
    if (!m) return "(null)";
    return wine_dbg_sprintf("{%.2f,%.2f,%.2f,%.2f,%.2f,%.2f}", m->m11, m->m12, m->m21, m->m22,
        m->dx, m->dy);
}

const char *debugstr_sa_script(UINT16) DECLSPEC_HIDDEN;

static inline unsigned short get_table_entry(const unsigned short *table, WCHAR ch)
{
    return table[table[table[ch >> 8] + ((ch >> 4) & 0x0f)] + (ch & 0xf)];
}

static inline FLOAT get_scaled_advance_width(INT32 advance, FLOAT emSize, const DWRITE_FONT_METRICS *metrics)
{
    return (FLOAT)advance * emSize / (FLOAT)metrics->designUnitsPerEm;
}

struct textlayout_desc
{
    IDWriteFactory3 *factory;
    const WCHAR *string;
    UINT32 length;
    IDWriteTextFormat *format;
    FLOAT max_width;
    FLOAT max_height;
    BOOL is_gdi_compatible;
    /* fields below are only meaningful for gdi-compatible layout */
    FLOAT ppdip;
    const DWRITE_MATRIX *transform;
    BOOL use_gdi_natural;
};

struct glyphrunanalysis_desc
{
    const DWRITE_GLYPH_RUN *run;
    const DWRITE_MATRIX *transform;
    DWRITE_RENDERING_MODE rendering_mode;
    DWRITE_MEASURING_MODE measuring_mode;
    DWRITE_GRID_FIT_MODE gridfit_mode;
    DWRITE_TEXT_ANTIALIAS_MODE aa_mode;
    FLOAT origin_x;
    FLOAT origin_y;
    FLOAT ppdip;
};

extern HRESULT convert_fontface_to_logfont(IDWriteFontFace*, LOGFONTW*) DECLSPEC_HIDDEN;
extern HRESULT create_numbersubstitution(DWRITE_NUMBER_SUBSTITUTION_METHOD,const WCHAR *locale,BOOL,IDWriteNumberSubstitution**) DECLSPEC_HIDDEN;
extern HRESULT create_textformat(const WCHAR*,IDWriteFontCollection*,DWRITE_FONT_WEIGHT,DWRITE_FONT_STYLE,DWRITE_FONT_STRETCH,
                                 FLOAT,const WCHAR*,IDWriteTextFormat**) DECLSPEC_HIDDEN;
extern HRESULT create_textlayout(const struct textlayout_desc*,IDWriteTextLayout**) DECLSPEC_HIDDEN;
extern HRESULT create_trimmingsign(IDWriteFactory3*,IDWriteTextFormat*,IDWriteInlineObject**) DECLSPEC_HIDDEN;
extern HRESULT create_typography(IDWriteTypography**) DECLSPEC_HIDDEN;
extern HRESULT create_gdiinterop(IDWriteFactory3*,IDWriteGdiInterop1**) DECLSPEC_HIDDEN;
extern void    release_gdiinterop(IDWriteGdiInterop1*) DECLSPEC_HIDDEN;
extern HRESULT create_localizedstrings(IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
extern HRESULT add_localizedstring(IDWriteLocalizedStrings*,const WCHAR*,const WCHAR*) DECLSPEC_HIDDEN;
extern HRESULT clone_localizedstring(IDWriteLocalizedStrings *iface, IDWriteLocalizedStrings **strings) DECLSPEC_HIDDEN;
extern void    set_en_localizedstring(IDWriteLocalizedStrings*,const WCHAR*) DECLSPEC_HIDDEN;
extern HRESULT get_system_fontcollection(IDWriteFactory3*,IDWriteFontCollection**) DECLSPEC_HIDDEN;
extern HRESULT get_eudc_fontcollection(IDWriteFactory3*,IDWriteFontCollection**) DECLSPEC_HIDDEN;
extern HRESULT get_textanalyzer(IDWriteTextAnalyzer**) DECLSPEC_HIDDEN;
extern HRESULT create_font_file(IDWriteFontFileLoader *loader, const void *reference_key, UINT32 key_size, IDWriteFontFile **font_file) DECLSPEC_HIDDEN;
extern HRESULT create_localfontfileloader(IDWriteLocalFontFileLoader** iface) DECLSPEC_HIDDEN;
extern HRESULT create_fontface(DWRITE_FONT_FACE_TYPE,UINT32,IDWriteFontFile* const*,UINT32,DWRITE_FONT_SIMULATIONS,IDWriteFontFace3**) DECLSPEC_HIDDEN;
extern HRESULT create_font_collection(IDWriteFactory3*,IDWriteFontFileEnumerator*,BOOL,IDWriteFontCollection**) DECLSPEC_HIDDEN;
extern HRESULT create_glyphrunanalysis(const struct glyphrunanalysis_desc*,IDWriteGlyphRunAnalysis**) DECLSPEC_HIDDEN;
extern BOOL    is_system_collection(IDWriteFontCollection*) DECLSPEC_HIDDEN;
extern HRESULT get_local_refkey(const WCHAR*,const FILETIME*,void**,UINT32*) DECLSPEC_HIDDEN;
extern HRESULT get_filestream_from_file(IDWriteFontFile*,IDWriteFontFileStream**) DECLSPEC_HIDDEN;
extern BOOL    is_face_type_supported(DWRITE_FONT_FACE_TYPE) DECLSPEC_HIDDEN;
extern HRESULT get_family_names_from_stream(IDWriteFontFileStream*,UINT32,DWRITE_FONT_FACE_TYPE,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
extern HRESULT create_colorglyphenum(FLOAT,FLOAT,const DWRITE_GLYPH_RUN*,const DWRITE_GLYPH_RUN_DESCRIPTION*,DWRITE_MEASURING_MODE,
    const DWRITE_MATRIX*,UINT32,IDWriteColorGlyphRunEnumerator**) DECLSPEC_HIDDEN;
extern BOOL lb_is_newline_char(WCHAR) DECLSPEC_HIDDEN;
extern HRESULT create_system_fontfallback(IDWriteFactory3*,IDWriteFontFallback**) DECLSPEC_HIDDEN;
extern void    release_system_fontfallback(IDWriteFontFallback*) DECLSPEC_HIDDEN;
extern HRESULT create_matching_font(IDWriteFontCollection*,const WCHAR*,DWRITE_FONT_WEIGHT,DWRITE_FONT_STYLE,DWRITE_FONT_STRETCH,
    IDWriteFont**) DECLSPEC_HIDDEN;
extern HRESULT create_fontfacereference(IDWriteFactory3*,IDWriteFontFile*,UINT32,DWRITE_FONT_SIMULATIONS,
    IDWriteFontFaceReference**) DECLSPEC_HIDDEN;

/* Opentype font table functions */
struct dwrite_font_props {
    DWRITE_FONT_STYLE style;
    DWRITE_FONT_STRETCH stretch;
    DWRITE_FONT_WEIGHT weight;
    DWRITE_PANOSE panose;
};

extern HRESULT opentype_analyze_font(IDWriteFontFileStream*,UINT32*,DWRITE_FONT_FILE_TYPE*,DWRITE_FONT_FACE_TYPE*,BOOL*) DECLSPEC_HIDDEN;
extern HRESULT opentype_get_font_table(IDWriteFontFileStream*,DWRITE_FONT_FACE_TYPE,UINT32,UINT32,const void**,void**,UINT32*,BOOL*) DECLSPEC_HIDDEN;
extern HRESULT opentype_cmap_get_unicode_ranges(void*,UINT32,DWRITE_UNICODE_RANGE*,UINT32*) DECLSPEC_HIDDEN;
extern void opentype_get_font_properties(IDWriteFontFileStream*,DWRITE_FONT_FACE_TYPE,UINT32,struct dwrite_font_props*) DECLSPEC_HIDDEN;
extern void opentype_get_font_metrics(IDWriteFontFileStream*,DWRITE_FONT_FACE_TYPE,UINT32,DWRITE_FONT_METRICS1*,DWRITE_CARET_METRICS*) DECLSPEC_HIDDEN;
extern HRESULT opentype_get_font_info_strings(const void*,DWRITE_INFORMATIONAL_STRING_ID,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
extern HRESULT opentype_get_font_familyname(IDWriteFontFileStream*,DWRITE_FONT_FACE_TYPE,UINT32,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
extern HRESULT opentype_get_font_facename(IDWriteFontFileStream*,DWRITE_FONT_FACE_TYPE,UINT32,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
extern HRESULT opentype_get_typographic_features(IDWriteFontFace*,UINT32,UINT32,UINT32,UINT32*,DWRITE_FONT_FEATURE_TAG*) DECLSPEC_HIDDEN;
extern BOOL opentype_get_vdmx_size(const void*,INT,UINT16*,UINT16*) DECLSPEC_HIDDEN;
extern UINT32 opentype_get_cpal_palettecount(const void*) DECLSPEC_HIDDEN;
extern UINT32 opentype_get_cpal_paletteentrycount(const void*) DECLSPEC_HIDDEN;
extern HRESULT opentype_get_cpal_entries(const void*,UINT32,UINT32,UINT32,DWRITE_COLOR_F*) DECLSPEC_HIDDEN;

struct dwrite_colorglyph {
    USHORT layer; /* [0, num_layers) index indicating current layer */
    /* base glyph record data, set once on initialization */
    USHORT first_layer;
    USHORT num_layers;
    /* current layer record data, updated every time glyph is switched to next layer */
    UINT16 glyph;
    UINT16 palette_index;
};

extern HRESULT opentype_get_colr_glyph(const void*,UINT16,struct dwrite_colorglyph*) DECLSPEC_HIDDEN;
extern void opentype_colr_next_glyph(const void*,struct dwrite_colorglyph*) DECLSPEC_HIDDEN;

enum gasp_flags {
    GASP_GRIDFIT             = 0x0001,
    GASP_DOGRAY              = 0x0002,
    GASP_SYMMETRIC_GRIDFIT   = 0x0004,
    GASP_SYMMETRIC_SMOOTHING = 0x0008,
};

extern WORD opentype_get_gasp_flags(const WORD*,UINT32,INT) DECLSPEC_HIDDEN;

/* BiDi helpers */
extern HRESULT bidi_computelevels(const WCHAR*,UINT32,UINT8,UINT8*,UINT8*) DECLSPEC_HIDDEN;
extern WCHAR bidi_get_mirrored_char(WCHAR) DECLSPEC_HIDDEN;

/* FreeType integration */
struct dwrite_glyphbitmap {
    IDWriteFontFace3 *fontface;
    FLOAT emsize;
    BOOL nohint;
    UINT16 index;
    INT pitch;
    RECT bbox;
    BYTE *buf;
    DWRITE_TEXTURE_TYPE type;
    DWRITE_MATRIX *m;
};

extern BOOL init_freetype(void) DECLSPEC_HIDDEN;
extern void release_freetype(void) DECLSPEC_HIDDEN;
extern HRESULT freetype_get_design_glyph_metrics(IDWriteFontFace3*,UINT16,UINT16,DWRITE_GLYPH_METRICS*) DECLSPEC_HIDDEN;
extern void freetype_notify_cacheremove(IDWriteFontFace3*) DECLSPEC_HIDDEN;
extern BOOL freetype_is_monospaced(IDWriteFontFace3*) DECLSPEC_HIDDEN;
extern HRESULT freetype_get_glyphrun_outline(IDWriteFontFace3*,FLOAT,UINT16 const*,FLOAT const*, DWRITE_GLYPH_OFFSET const*,
    UINT32,BOOL,IDWriteGeometrySink*) DECLSPEC_HIDDEN;
extern UINT16 freetype_get_glyphcount(IDWriteFontFace3*) DECLSPEC_HIDDEN;
extern void freetype_get_glyphs(IDWriteFontFace3*,INT,UINT32 const*,UINT32,UINT16*) DECLSPEC_HIDDEN;
extern BOOL freetype_has_kerning_pairs(IDWriteFontFace3*) DECLSPEC_HIDDEN;
extern INT32 freetype_get_kerning_pair_adjustment(IDWriteFontFace3*,UINT16,UINT16) DECLSPEC_HIDDEN;
extern void freetype_get_glyph_bbox(struct dwrite_glyphbitmap*) DECLSPEC_HIDDEN;
extern BOOL freetype_get_glyph_bitmap(struct dwrite_glyphbitmap*) DECLSPEC_HIDDEN;
extern INT freetype_get_charmap_index(IDWriteFontFace3*,BOOL*) DECLSPEC_HIDDEN;
extern INT32 freetype_get_glyph_advance(IDWriteFontFace3*,FLOAT,UINT16,DWRITE_MEASURING_MODE) DECLSPEC_HIDDEN;

/* Glyph shaping */
enum SCRIPT_JUSTIFY
{
    SCRIPT_JUSTIFY_NONE,
    SCRIPT_JUSTIFY_ARABIC_BLANK,
    SCRIPT_JUSTIFY_CHARACTER,
    SCRIPT_JUSTIFY_RESERVED1,
    SCRIPT_JUSTIFY_BLANK,
    SCRIPT_JUSTIFY_RESERVED2,
    SCRIPT_JUSTIFY_RESERVED3,
    SCRIPT_JUSTIFY_ARABIC_NORMAL,
    SCRIPT_JUSTIFY_ARABIC_KASHIDA,
    SCRIPT_JUSTIFY_ARABIC_ALEF,
    SCRIPT_JUSTIFY_ARABIC_HA,
    SCRIPT_JUSTIFY_ARABIC_RA,
    SCRIPT_JUSTIFY_ARABIC_BA,
    SCRIPT_JUSTIFY_ARABIC_BARA,
    SCRIPT_JUSTIFY_ARABIC_SEEN,
    SCRIPT_JUSTIFY_ARABIC_SEEN_M
};

struct scriptshaping_cache;

struct scriptshaping_context
{
    struct scriptshaping_cache *cache;
    UINT32 language_tag;

    const WCHAR *text;
    UINT32 length;
    BOOL is_rtl;

    UINT32 max_glyph_count;
};

extern HRESULT create_scriptshaping_cache(IDWriteFontFace*,struct scriptshaping_cache**) DECLSPEC_HIDDEN;
extern void release_scriptshaping_cache(struct scriptshaping_cache*) DECLSPEC_HIDDEN;

struct scriptshaping_ops
{
    HRESULT (*contextual_shaping)(struct scriptshaping_context *context, UINT16 *clustermap, UINT16 *glyph_indices, UINT32* actual_glyph_count);
    HRESULT (*set_text_glyphs_props)(struct scriptshaping_context *context, UINT16 *clustermap, UINT16 *glyph_indices,
                                     UINT32 glyphcount, DWRITE_SHAPING_TEXT_PROPERTIES *text_props, DWRITE_SHAPING_GLYPH_PROPERTIES *glyph_props);
};

extern const struct scriptshaping_ops default_shaping_ops DECLSPEC_HIDDEN;
extern const struct scriptshaping_ops latn_shaping_ops DECLSPEC_HIDDEN;