libTextSuite/header/libTextSuite.h

#ifndef LIB_TEXT_SUITE_H
#define LIB_TEXT_SUITE_H

#include <stdint.h>
#include <string.h>
#include <stdbool.h>

#if __MINGW32__
#   define WINAPI __stdcall
#elif __GNUC__
#   if defined(__x86_64__)
#       define WINAPI
#   else
#       define WINAPI __attribute__((stdcall))
#   endif
#else
#   define WINAPI
#endif

#define STATIC_ASSERT(cond, msg)    typedef char static_assertion_##msg[(cond)?1:-1]

typedef uint16_t lts_wchar_t;

STATIC_ASSERT(sizeof(float)       == 4, size_of_float_should_be_4);
STATIC_ASSERT(sizeof(lts_wchar_t) == 2, size_of_wchar_t_should_be_2);

/**********************************************************************************************************************************/
/* public interface                                                                                                               */
/**********************************************************************************************************************************/

/* enumerations *******************************************************************************************************************/
typedef enum 
{
    ltsErrUnknown                   =   -1,
    ltsErrNone                      =    0,

    // misc
    ltsErrNotInitialized            =    1,
    ltsErrInvalidEnum               =    2,
    ltsErrInvalidValue              =    3,
    ltsErrInvalidOperation          =    4,
    ltsErrInvalidType               =    5,

    // invalid handles
    ltsErrInvalidContextHandle      =  100,
    ltsErrInvalidRendererHandle     =  101,
    ltsErrInvalidTextBlockHandle    =  102,
    ltsErrInvalidFontHandle         =  103,
    ltsErrInvalidFontCreatorHandle  =  104,
    ltsErrInvalidImageHandle        =  105,
    ltsErrInvalidPostProcHandle     =  106,
    
    // library
    ltsErrInvalidLibName            =  200,
    ltsErrInvalidLibHandle          =  201,
    ltsErrInvalidMethodName         =  202
}
lts_error_code_t;
STATIC_ASSERT(sizeof(lts_error_code_t) == 4, size_of_lts_error_code_t_should_be_4);

typedef enum
{
    ltsUTF8,
    ltsISO_8859_1,
    ltsISO_8859_2,
    ltsISO_8859_3,
    ltsISO_8859_4,
    ltsISO_8859_5,
    ltsISO_8859_6,
    ltsISO_8859_7,
    ltsISO_8859_8,
    ltsISO_8859_9,
    ltsISO_8859_10,
    ltsISO_8859_11,
    ltsISO_8859_13,
    ltsISO_8859_14,
    ltsISO_8859_15,
    ltsISO_8859_16,
    ltsISO_037,
    ltsISO_437,
    ltsISO_500,
    ltsISO_737,
    ltsISO_775,
    ltsISO_850,
    ltsISO_852,
    ltsISO_855,
    ltsISO_857,
    ltsISO_860,
    ltsISO_861,
    ltsISO_862,
    ltsISO_863,
    ltsISO_864,
    ltsISO_865,
    ltsISO_866,
    ltsISO_869,
    ltsISO_874,
    ltsISO_875,
    ltsISO_1026,
    ltsISO_1250,
    ltsISO_1251,
    ltsISO_1252,
    ltsISO_1253,
    ltsISO_1254,
    ltsISO_1255,
    ltsISO_1256,
    ltsISO_1257,
    ltsISO_1258
}
lts_code_page_t;
STATIC_ASSERT(sizeof(lts_code_page_t) == 4, size_of_lts_code_page_t_should_be_4);

typedef enum
{
    ltsFormatEmpty,
    ltsFormatRGBA8,
    ltsFormatLumAlpha8,
    ltsFormatAlpha8,
    ltsFormatLum8
}
lts_format_t;
STATIC_ASSERT(sizeof(lts_format_t) == 4, size_of_lts_format_t_should_be_4);

typedef enum
{
    ltsRendererUnknown,
    ltsRendererOpenGL,
    ltsRendererOpenGLES
}
lts_renderer_type_t;
STATIC_ASSERT(sizeof(lts_renderer_type_t) == 4, size_of_lts_renderer_type_t_should_be_4);

typedef enum
{
    ltsFontCreatorUnknown,
    ltsFontCreatorFreeType,
    ltsFontCreatorGDI,
    ltsFontCreatorCustom
}
lts_font_creator_type_t;
STATIC_ASSERT(sizeof(lts_font_creator_type_t) == 4, size_of_lts_font_creator_type_t_should_be_4);

typedef enum
{
    ltsVertAlignTop,
    ltsVertAlignCenter,
    ltsVertAlignBottom
}
lts_vert_align_t;
STATIC_ASSERT(sizeof(lts_vert_align_t) == 4, size_of_lts_vert_align_t_should_be_4);

typedef enum
{
    ltsHorzAlignLeft,
    ltsHorzAlignCenter,
    ltsHorzAlignRight,
    ltsHorzAlignJustify
}
lts_horz_align_t;
STATIC_ASSERT(sizeof(lts_horz_align_t) == 4, size_of_lts_horz_align_t_should_be_4);

typedef enum
{
    ltsClipNone,
    ltsClipWordBorder,
    ltsClipCharBorder,
    ltsClipWordComplete,
    ltsClipCharComplete
}
lts_clipping_t;
STATIC_ASSERT(sizeof(lts_clipping_t) == 4, size_of_lts_clipping_t_should_be_4);

typedef enum
{
    ltsAANone,
    ltsAANormal
}
lts_anti_aliasing_t;
STATIC_ASSERT(sizeof(lts_anti_aliasing_t) == 4, size_of_lts_anti_aliasing_t_should_be_4);

typedef enum
{
    ltsUsageInclude,
    ltsUsageExclude
}
lts_char_range_usage_t;
STATIC_ASSERT(sizeof(lts_char_range_usage_t) == 4, size_of_lts_char_range_usage_t_should_be_4);

typedef enum 
{
    ltsStreamOriginBegin            = 0,
    ltsStreamOriginCurrent          = 1,
    ltsStreamOriginEnd              = 2
}
lts_stream_origin_t;
STATIC_ASSERT(sizeof(lts_stream_origin_t) == 4, size_of_lts_stream_origin_t_should_be_4);

typedef enum
{
    ltsModeIgnore,
    ltsModeReplace,
    ltsModeModulate
}
lts_image_mode_t;
STATIC_ASSERT(sizeof(lts_image_mode_t) == 4, size_of_lts_image_mode_t_should_be_4);

/* flags **************************************************************************************************************************/
#define FLAGS_MAKE(enum)            (1 << enum)
#define FLAGS_SET(flags, enum)      flags |= FLAGS_MAKE(enum)
#define FLAGS_UNSET(flags, enum)    flags &= ~FLAGS_MAKE(enum)
#define FLAGS_CLEAR(flags)          flags = 0
#define FLAGS_IS_SET(flags, enum)   (flags & FLAGS_MAKE(enum))

typedef enum
{
    ltsBlockFlagWordWrap
}
lts_block_flag_t;
typedef uint32_t lts_block_flags_t;
STATIC_ASSERT(sizeof(lts_block_flag_t) == 4, size_of_lts_block_flag_t_should_be_4);

typedef enum
{
    ltsFontStyleBold,
    ltsFontStyleItalic,
    ltsFontStyleUnderline,
    ltsFontStyleStrikeout,
}
lts_font_style_flag_t;
typedef uint32_t lts_font_style_flags_t;
STATIC_ASSERT(sizeof(lts_font_style_flag_t) == 4, size_of_lts_font_style_flag_t_should_be_4);

typedef enum
{
    ltsColorChannelRed,
    ltsColorChannelGreen,
    ltsColorChannelBlue,
    ltsColorChannelAlpha
}
lts_color_channel_flag_t;
typedef uint32_t lts_color_channel_flags_t;
STATIC_ASSERT(sizeof(lts_color_channel_flags_t) == 4, size_of_lts_color_channel_flag_t_should_be_4);

/* structures *********************************************************************************************************************/
typedef struct
{
    int32_t                 x;
    int32_t                 y;
}
lts_position_t;
STATIC_ASSERT(sizeof(lts_position_t) == 8, size_of_lts_position_t_should_be_8);

typedef union
{
    struct { lts_position_t top_left, bottom_right; };
    struct { int32_t left, top, right, bottom; };
}
lts_rect_t;
STATIC_ASSERT(sizeof(lts_rect_t) == 16, size_of_lts_rect_t_should_be_16);

typedef union
{
    struct { float r, g, b, a; };
    float arr[4];
}
lts_color4f_t;
STATIC_ASSERT(sizeof(lts_color4f_t) == 16, size_of_lts_color4f_t_should_be_16);

typedef struct
{
    lts_position_t          glyph_origin;
    lts_rect_t              glyph_rect;
    int32_t                 advance;
}
lts_glyph_metric_t;
STATIC_ASSERT(sizeof(lts_glyph_metric_t) == 28, size_of_lts_glyph_metric_t_should_be_28);

typedef struct
{
    int32_t                 ascent;
    int32_t                 descent;
    int32_t                 external_leading;
    int32_t                 base_line_offset;
    int32_t                 char_spacing;
    int32_t                 line_height;
    int32_t                 line_spacing;
}
lts_text_metric_t;
STATIC_ASSERT(sizeof(lts_text_metric_t) == 28, size_of_lts_text_metric_t_should_be_28);

typedef struct
{
    int32_t                 size;
    lts_font_style_flags_t  style;
    lts_anti_aliasing_t     anti_aliasing;
    lts_wchar_t             default_char;
    uint8_t                 __reserved[2];
    
    int32_t                 ascent;
    int32_t                 descent;
    int32_t                 external_leading;
    int32_t                 base_line_offset;
    
    int32_t                 underline_pos;
    int32_t                 underline_size;
    int32_t                 strikeout_pos;
    int32_t                 strikeout_size;
}
lts_font_metric_t;
STATIC_ASSERT(sizeof(lts_font_metric_t) == 48, size_of_lts_font_metric_t_should_be_48);

typedef float lts_vector4f_t[4];
STATIC_ASSERT(sizeof(lts_vector4f_t) == 16, size_of_lts_vector4f_t_should_be_16);

typedef lts_vector4f_t lts_matrix4f_t[4];
STATIC_ASSERT(sizeof(lts_matrix4f_t) == 64, size_of_lts_matrix4f_t_should_be_64);

typedef void*           lts_handle_t;
typedef lts_handle_t    lts_context_handle_t;
typedef lts_handle_t    lts_renderer_handle_t;
typedef lts_handle_t    lts_text_block_handle_t;
typedef lts_handle_t    lts_font_creator_handle_t;
typedef lts_handle_t    lts_font_handle_t;
typedef lts_handle_t    lts_post_processor_handle_t;
typedef lts_handle_t    lts_image_handle_t;
typedef lts_handle_t    lts_char_handle_t;
typedef lts_image_mode_t lts_image_modes_t[4];

/* stream */
typedef int (WINAPI *lts_stream_func_read_t)(void* args, void* buffer, int count);
typedef int (WINAPI *lts_stream_func_seek_t)(void* args, lts_stream_origin_t origin, int offset);
typedef struct
{
    void*                   args;
    lts_stream_func_read_t  read;
    lts_stream_func_seek_t  seek;
}
lts_stream_t;

/* custom post processor */
typedef void (WINAPI *lts_post_processor_execute_func_t)(lts_char_handle_t charHandle, lts_image_handle_t imageHandle);
typedef struct
{
    void*                               args;
    lts_post_processor_execute_func_t   execute;
}
lts_post_processor_custom_data_t;

/* custom renderer */
typedef void            (WINAPI *lts_renderer_custom_begin_render_t)        (void* args);
typedef void            (WINAPI *lts_renderer_custom_end_render_t)          (void* args);
typedef lts_position_t  (WINAPI *lts_renderer_custom_get_draw_pos_t)        (void* args);
typedef void            (WINAPI *lts_renderer_custom_set_draw_pos_t)        (lts_position_t value, void* args);
typedef void            (WINAPI *lts_renderer_custom_move_draw_pos_t)       (lts_position_t value, void* args);
typedef void            (WINAPI *lts_renderer_custom_set_color_t)           (lts_color4f_t value, void* args);
typedef void            (WINAPI *lts_renderer_custom_render)                (void* ref, int forcedWidth, void* args);
typedef void*           (WINAPI *lts_renderer_custom_create_ref)            (lts_char_handle_t charHandle, lts_image_handle_t imageHandle, void* args);
typedef void            (WINAPI *lts_renderer_custom_free_ref)              (void* ref, void* args);
typedef struct
{
    void*                               args;
    
    lts_renderer_custom_begin_render_t  beginRender;
    lts_renderer_custom_end_render_t    endRender;
    lts_renderer_custom_get_draw_pos_t  getDrawPos;
    lts_renderer_custom_set_draw_pos_t  setDrawPos;
    lts_renderer_custom_move_draw_pos_t moveDrawPos;
    lts_renderer_custom_set_color_t     setColor;
    lts_renderer_custom_render          render;
    
    lts_renderer_custom_create_ref      createRef;
    lts_renderer_custom_free_ref        freeRef;
}
lts_renderer_custom_data_t;

/* image */
typedef void (WINAPI *lts_image_load_callback_t) (lts_image_handle_t handle, int x, int y, lts_color4f_t pixel, void* args);
typedef void (WINAPI *lts_image_blend_callback_t)(lts_image_handle_t handle, lts_color4f_t src, lts_color4f_t dst, lts_color4f_t* result, void* args);

/* callbacks **********************************************************************************************************************/
lts_context_handle_t        (WINAPI *lts_context_create)                        ();
lts_error_code_t            (WINAPI *lts_context_get_code_page)                 (lts_context_handle_t handle, lts_code_page_t* value);
lts_error_code_t            (WINAPI *lts_context_get_default_char)              (lts_context_handle_t handle, lts_wchar_t* value);
lts_error_code_t            (WINAPI *lts_context_set_code_page)                 (lts_context_handle_t handle, lts_code_page_t value);
lts_error_code_t            (WINAPI *lts_context_set_default_char)              (lts_context_handle_t handle, lts_wchar_t value);
lts_wchar_t*                (WINAPI *lts_context_ansi_to_wide)                  (lts_context_handle_t handle, const char* text);
lts_error_code_t            (WINAPI *lts_context_destroy)                       (lts_context_handle_t handle);
    
lts_renderer_handle_t       (WINAPI *lts_renderer_create)                       (lts_context_handle_t handle, lts_renderer_type_t type, lts_format_t format);
lts_renderer_handle_t       (WINAPI *lts_renderer_create_custom)                (lts_context_handle_t handle, lts_format_t format, const lts_renderer_custom_data_t* data);
lts_text_block_handle_t     (WINAPI *lts_renderer_begin_block)                  (lts_renderer_handle_t handle, int top, int left, int width, int height, lts_block_flags_t flags);
lts_error_code_t            (WINAPI *lts_renderer_end_block)                    (lts_renderer_handle_t handle, lts_text_block_handle_t block);
lts_error_code_t            (WINAPI *lts_renderer_abort_block)                  (lts_renderer_handle_t handle, lts_text_block_handle_t block);
int                         (WINAPI *lts_renderer_get_text_width_a)             (lts_renderer_handle_t handle, lts_font_handle_t font, const char* text);
int                         (WINAPI *lts_renderer_get_text_width_w)             (lts_renderer_handle_t handle, lts_font_handle_t font, const lts_wchar_t* text);
lts_error_code_t            (WINAPI *lts_renderer_destroy)                      (lts_renderer_handle_t handle);

lts_font_creator_handle_t   (WINAPI *lts_font_creator_create)                   (lts_context_handle_t handle, lts_font_creator_type_t type);
lts_font_handle_t           (WINAPI *lts_font_creator_get_font_by_name)         (lts_font_creator_handle_t handle, const char* fontname,       int size, lts_font_style_flags_t style, lts_anti_aliasing_t antialiasing);
lts_font_handle_t           (WINAPI *lts_font_creator_get_font_by_file)         (lts_font_creator_handle_t handle, const char* filename,       int size, lts_font_style_flags_t style, lts_anti_aliasing_t antialiasing);
lts_font_handle_t           (WINAPI *lts_font_creator_get_font_by_stream)       (lts_font_creator_handle_t handle, lts_stream_t* stream, int size, lts_font_style_flags_t style, lts_anti_aliasing_t antialiasing);
lts_error_code_t            (WINAPI *lts_font_creator_destroy)                  (lts_font_creator_handle_t handle);

lts_post_processor_handle_t (WINAPI *lts_font_get_post_processor)               (lts_font_handle_t handle);
lts_error_code_t            (WINAPI *lts_font_get_tab_width)                    (lts_font_handle_t handle, int* value);
lts_error_code_t            (WINAPI *lts_font_get_char_spacing)                 (lts_font_handle_t handle, int* value);
lts_error_code_t            (WINAPI *lts_font_get_line_spacing)                 (lts_font_handle_t handle, float* value);
lts_error_code_t            (WINAPI *lts_font_get_metric)                       (lts_font_handle_t handle, lts_font_metric_t* value);
const char*                 (WINAPI *lts_font_get_fontname)                     (lts_font_handle_t handle);
const char*                 (WINAPI *lts_font_get_facename)                     (lts_font_handle_t handle);
const char*                 (WINAPI *lts_font_get_stylename)                    (lts_font_handle_t handle);
const char*                 (WINAPI *lts_font_get_fillname)                     (lts_font_handle_t handle);
const char*                 (WINAPI *lts_font_get_copyright)                    (lts_font_handle_t handle);
lts_error_code_t            (WINAPI *lts_font_set_post_processor)               (lts_font_handle_t handle, lts_post_processor_handle_t pp);
lts_error_code_t            (WINAPI *lts_font_set_tab_width)                    (lts_font_handle_t handle, int value);
lts_error_code_t            (WINAPI *lts_font_set_char_spacing)                 (lts_font_handle_t handle, int value);
lts_error_code_t            (WINAPI *lts_font_set_line_spacing)                 (lts_font_handle_t handle, float value);
lts_error_code_t            (WINAPI *lts_font_destroy)                          (lts_font_handle_t handle);

lts_error_code_t            (WINAPI *lts_text_block_get_rect)                   (lts_text_block_handle_t handle, lts_rect_t* value);
lts_error_code_t            (WINAPI *lts_text_block_get_width)                  (lts_text_block_handle_t handle, int* value);
lts_error_code_t            (WINAPI *lts_text_block_get_height)                 (lts_text_block_handle_t handle, int* value);
lts_error_code_t            (WINAPI *lts_text_block_get_flags)                  (lts_text_block_handle_t handle, lts_block_flags_t* value);
lts_error_code_t            (WINAPI *lts_text_block_get_top)                    (lts_text_block_handle_t handle, int* value);
lts_error_code_t            (WINAPI *lts_text_block_get_left)                   (lts_text_block_handle_t handle, int* value);
lts_error_code_t            (WINAPI *lts_text_block_get_vert_align)             (lts_text_block_handle_t handle, lts_vert_align_t* value);
lts_error_code_t            (WINAPI *lts_text_block_get_horz_align)             (lts_text_block_handle_t handle, lts_horz_align_t* value);
lts_error_code_t            (WINAPI *lts_text_block_get_clipping)               (lts_text_block_handle_t handle, lts_clipping_t* value);
lts_error_code_t            (WINAPI *lts_text_block_get_color)                  (lts_text_block_handle_t handle, lts_color4f_t* value);
lts_error_code_t            (WINAPI *lts_text_block_get_font)                   (lts_text_block_handle_t handle, lts_font_handle_t* value);
lts_error_code_t            (WINAPI *lts_text_block_set_top)                    (lts_text_block_handle_t handle, int value);
lts_error_code_t            (WINAPI *lts_text_block_set_left)                   (lts_text_block_handle_t handle, int value);
lts_error_code_t            (WINAPI *lts_text_block_set_vert_align)             (lts_text_block_handle_t handle, lts_vert_align_t value);
lts_error_code_t            (WINAPI *lts_text_block_set_horz_align)             (lts_text_block_handle_t handle, lts_horz_align_t value);
lts_error_code_t            (WINAPI *lts_text_block_set_clipping)               (lts_text_block_handle_t handle, lts_clipping_t value);
lts_error_code_t            (WINAPI *lts_text_block_set_color)                  (lts_text_block_handle_t handle, lts_color4f_t value);
lts_error_code_t            (WINAPI *lts_text_block_set_font)                   (lts_text_block_handle_t handle, lts_font_handle_t value);
int                         (WINAPI *lts_text_block_get_actual_height)          (lts_text_block_handle_t handle);
int                         (WINAPI *lts_text_block_get_text_width_a)           (lts_text_block_handle_t handle, const char* text);
int                         (WINAPI *lts_text_block_get_text_width_w)           (lts_text_block_handle_t handle, const lts_wchar_t* text);
lts_error_code_t            (WINAPI *lts_text_block_text_out_a)                 (lts_text_block_handle_t handle, const char* text);
lts_error_code_t            (WINAPI *lts_text_block_text_out_w)                 (lts_text_block_handle_t handle, const lts_wchar_t* text);
lts_error_code_t            (WINAPI *lts_text_block_destroy)                    (lts_text_block_handle_t handle);

lts_image_handle_t          (WINAPI *lts_image_create)                          (lts_context_handle_t handle);
lts_error_code_t            (WINAPI *lts_image_is_empty)                        (lts_image_handle_t handle, bool* value);
int                         (WINAPI *lts_image_get_width)                       (lts_image_handle_t handle);
int                         (WINAPI *lts_image_get_height)                      (lts_image_handle_t handle);
int                         (WINAPI *lts_image_get_line_size)                   (lts_image_handle_t handle);
int                         (WINAPI *lts_image_get_data_size)                   (lts_image_handle_t handle);
lts_error_code_t            (WINAPI *lts_image_get_format)                      (lts_image_handle_t handle, lts_format_t* value);
void*                       (WINAPI *lts_image_get_data)                        (lts_image_handle_t handle);
void*                       (WINAPI *lts_image_get_scanline)                    (lts_image_handle_t handle, int index);
lts_error_code_t            (WINAPI *lts_image_get_pixel_at)                    (lts_image_handle_t handle, int x, int y, lts_color4f_t pixel);
lts_error_code_t            (WINAPI *lts_image_assign)                          (lts_image_handle_t handle, lts_image_handle_t source);
lts_error_code_t            (WINAPI *lts_image_create_empty)                    (lts_image_handle_t handle, lts_format_t format, int width, int height);
lts_error_code_t            (WINAPI *lts_image_load_from_func)                  (lts_image_handle_t handle, lts_image_load_callback_t callback, void* args);
lts_error_code_t            (WINAPI *lts_image_resize)                          (lts_image_handle_t handle, int width, int height, int x, int y);
lts_error_code_t            (WINAPI *lts_image_fill_color)                      (lts_image_handle_t handle, lts_color4f_t color, lts_color_channel_flags_t mask, lts_image_modes_t modes);
lts_error_code_t            (WINAPI *lts_image_fill_pattern)                    (lts_image_handle_t handle, lts_image_handle_t pattern, int x, int y, lts_color_channel_flags_t mask, lts_image_modes_t modes);
lts_error_code_t            (WINAPI *lts_image_blend)                           (lts_image_handle_t handle, lts_image_handle_t source, int x, int y, lts_image_blend_callback_t callback, void* args);
lts_error_code_t            (WINAPI *lts_image_blur)                            (lts_image_handle_t handle, float horzRad, float horzStr, float vertRad, float vertStr, lts_color_channel_flags_t mask);
lts_error_code_t            (WINAPI *lts_image_destroy)                         (lts_image_handle_t handle);

lts_error_code_t            (WINAPI *lts_post_processor_add_range)              (lts_post_processor_handle_t handle, lts_char_range_usage_t usage, lts_wchar_t start, lts_wchar_t stop);
lts_error_code_t            (WINAPI *lts_post_processor_add_chars)              (lts_post_processor_handle_t handle, lts_char_range_usage_t usage, const lts_wchar_t* chars);
lts_error_code_t            (WINAPI *lts_post_processor_clear_ranges)           (lts_post_processor_handle_t handle);
lts_error_code_t            (WINAPI *lts_post_processor_execute)                (lts_post_processor_handle_t handle, lts_char_handle_t charHandle, lts_image_handle_t image);
lts_post_processor_handle_t (WINAPI *lts_post_processor_fill_color_create)      (lts_post_processor_handle_t handle, lts_color4f_t color, lts_image_modes_t modes, lts_color_channel_flags_t channels);
lts_post_processor_handle_t (WINAPI *lts_post_processor_fill_pattern_create)    (lts_post_processor_handle_t handle, lts_image_handle_t pattern, bool ownsPattern, lts_position_t position, lts_image_modes_t modes, lts_color_channel_flags_t channels);
lts_post_processor_handle_t (WINAPI *lts_post_processor_border_create)          (lts_post_processor_handle_t handle, float width, float strength, lts_color4f_t color, bool keepSize);
lts_post_processor_handle_t (WINAPI *lts_post_processor_shadow_create)          (lts_post_processor_handle_t handle, float radius, float strength, lts_position_t offset, lts_color4f_t color);
lts_post_processor_handle_t (WINAPI *lts_post_processor_custom_create)          (lts_post_processor_handle_t handle, const lts_post_processor_custom_data_t* data);
lts_error_code_t            (WINAPI *lts_post_processor_destroy)                (lts_post_processor_handle_t handle);

lts_error_code_t            (WINAPI *lts_char_get_char_code)                    (lts_char_handle_t handle, lts_wchar_t* value);
lts_error_code_t            (WINAPI *lts_char_get_glyph_metric)                 (lts_char_handle_t handle, lts_glyph_metric_t* value);
lts_error_code_t            (WINAPI *lts_char_set_glyph_metric)                 (lts_char_handle_t handle, const lts_glyph_metric_t* value);

const char*                 (WINAPI *lts_get_version)                           ();
lts_error_code_t            (WINAPI *lts_get_last_error_code)                   ();
const char*                 (WINAPI *lts_get_last_error_msg)                    ();

/* constants **********************************************************************************************************************/
    lts_image_modes_t LTS_IMAGE_MODES_REPLACE_ALL = {
        ltsModeReplace,
        ltsModeReplace,
        ltsModeReplace,
        ltsModeReplace
    };
    lts_image_modes_t LTS_IMAGE_MODES_MODULATE_ALPHA = {
        ltsModeReplace,
        ltsModeReplace,
        ltsModeReplace,
        ltsModeModulate
    };
    lts_image_modes_t LTS_IMAGE_MODES_MODULATE_ALL = {
        ltsModeModulate,
        ltsModeModulate,
        ltsModeModulate,
        ltsModeModulate
    };

    lts_color_channel_flags_t LTS_COLOR_CHANNELS_RGB = 
        FLAGS_MAKE(ltsColorChannelRed)   |
        FLAGS_MAKE(ltsColorChannelGreen) |
        FLAGS_MAKE(ltsColorChannelBlue);
    lts_color_channel_flags_t LTS_COLOR_CHANNELS_RGBA = 
        FLAGS_MAKE(ltsColorChannelRed)   |
        FLAGS_MAKE(ltsColorChannelGreen) |
        FLAGS_MAKE(ltsColorChannelBlue)  |
        FLAGS_MAKE(ltsColorChannelAlpha);

/* helper *************************************************************************************************************************/
static inline lts_color4f_t ltsColor4f(float r, float g, float b, float a)
    { lts_color4f_t ret = { r, g, b, a }; return ret; };

static inline lts_position_t ltsPosition(int x, int y)
    { lts_position_t ret = { x, y }; return ret; };
    
static inline lts_rect_t ltsRect(int left, int top, int right, int bottom)
    { lts_rect_t ret = { left, top, right, bottom }; return ret; };

static inline lts_rect_t ltsRectFromPos(lts_position_t leftTop, lts_position_t bottomRight)
    { lts_rect_t ret = { leftTop.x, leftTop.y, bottomRight.x, bottomRight.y }; return ret; };

/**********************************************************************************************************************************/
/* internal initialization code                                                                                                   */
/**********************************************************************************************************************************/
//#define LSF_DEBUG
#ifdef LSF_DEBUG
#  include <stdio.h>
#endif

#if WIN32 || WIN64 || _WIN32 || _WIN64
#  include <windows.h>

typedef HMODULE lib_handle_t;

lib_handle_t open_lib(const char* name)
    { return LoadLibrary(name); };
    
void* get_addr(lib_handle_t handle, const char* name)
    { return GetProcAddress(handle, name); };

int close_lib(lib_handle_t handle)
    { return FreeLibrary(handle); };
    
#elif LINUX || __linux__
#  include <dlfcn.h>

typedef void* lib_handle_t;

lib_handle_t open_lib(const char* name)
    { return dlopen(name, RTLD_LAZY); };
    
void* get_addr(lib_handle_t handle, const char* name)
    { return dlsym(handle, name); };

int close_lib(lib_handle_t handle)
    { return !dlclose(handle); };

#else
#   error "unknown operation system"
#endif

#ifndef LSF_DEBUG
#  define LoadProc(proc, name) \
        proc = get_addr(handle, name); \
        if (!proc) \
            return ltsErrInvalidMethodName
#else
#  define LoadProc(proc, name) \
        proc = get_addr(handle, name); \
        printf("load method '%s' (addr=0x%016x)\n", name, proc); \
        if (!proc) \
            return ltsErrInvalidMethodName
#endif

lts_error_code_t (WINAPI *lts_initialize_intern)();
lts_error_code_t (WINAPI *lts_finalize_intern)  ();

lib_handle_t handle = NULL;

lts_error_code_t lts_initialize(const char* libname)
{
#ifdef LSF_DEBUG
    printf("loading library '%s'\n", libname);
#endif
    
    handle = open_lib(libname);
    if (!handle)
        return ltsErrInvalidLibName;
    
#ifdef LSF_DEBUG
    printf("    done (handle=0x%016x)\n", handle);
#endif
    
    LoadProc(lts_context_create,                        "ltsContextCreate");
    LoadProc(lts_context_get_code_page,                 "ltsContextGetCodePage");
    LoadProc(lts_context_get_default_char,              "ltsContextGetDefaultChar");
    LoadProc(lts_context_set_code_page,                 "ltsContextSetCodePage");
    LoadProc(lts_context_set_default_char,              "ltsContextSetDefaultChar");
    LoadProc(lts_context_ansi_to_wide,                  "ltsContextAnsiToWide");
    LoadProc(lts_context_destroy,                       "ltsContextDestroy");
    
    LoadProc(lts_renderer_create,                       "ltsRendererCreate");
    LoadProc(lts_renderer_create_custom,                "ltsRendererCustomCreate");
    LoadProc(lts_renderer_begin_block,                  "ltsRendererBeginBlock");
    LoadProc(lts_renderer_end_block,                    "ltsRendererEndBlock");
    LoadProc(lts_renderer_abort_block,                  "ltsRendererAbortBlock");
    LoadProc(lts_renderer_get_text_width_a,             "ltsRendererGetTextWidthA");
    LoadProc(lts_renderer_get_text_width_w,             "ltsRendererGetTextWidthW");
    LoadProc(lts_renderer_destroy,                      "ltsRendererDestroy");
    
    LoadProc(lts_font_creator_create,                   "ltsFontCreatorCreate");
    LoadProc(lts_font_creator_get_font_by_name,         "ltsFontCreatorGetFontByName");
    LoadProc(lts_font_creator_get_font_by_file,         "ltsFontCreatorGetFontByFile");
    LoadProc(lts_font_creator_get_font_by_stream,       "ltsFontCreatorGetFontByStream");
    LoadProc(lts_font_creator_destroy,                  "ltsFontCreatorDestroy");
    
    LoadProc(lts_font_get_post_processor,               "ltsFontGetPostProcessor");
    LoadProc(lts_font_get_tab_width,                    "ltsFontGetTabWidth");
    LoadProc(lts_font_get_char_spacing,                 "ltsFontGetCharSpacing");
    LoadProc(lts_font_get_line_spacing,                 "ltsFontGetLineSpacing");
    LoadProc(lts_font_get_metric,                       "ltsFontGetMetric");
    LoadProc(lts_font_get_fontname,                     "ltsFontGetFontname");
    LoadProc(lts_font_get_facename,                     "ltsFontGetFacename");
    LoadProc(lts_font_get_stylename,                    "ltsFontGetStylename");
    LoadProc(lts_font_get_fillname,                     "ltsFontGetFullname");
    LoadProc(lts_font_get_copyright,                    "ltsFontGetCopyright");
    LoadProc(lts_font_set_post_processor,               "ltsFontSetPostProcessor");
    LoadProc(lts_font_set_tab_width,                    "ltsFontSetTabWidth");
    LoadProc(lts_font_set_char_spacing,                 "ltsFontSetCharSpacing");
    LoadProc(lts_font_set_line_spacing,                 "ltsFontSetLineSpacing");
    LoadProc(lts_font_destroy,                          "ltsFontDestroy");
    
    LoadProc(lts_text_block_get_rect,                   "ltsTextBlockGetRect");
    LoadProc(lts_text_block_get_width,                  "ltsTextBlockGetWidth");
    LoadProc(lts_text_block_get_height,                 "ltsTextBlockGetHeight");
    LoadProc(lts_text_block_get_flags,                  "ltsTextBlockGetFlags");
    LoadProc(lts_text_block_get_top,                    "ltsTextBlockGetTop");
    LoadProc(lts_text_block_get_left,                   "ltsTextBlockGetLeft");
    LoadProc(lts_text_block_get_vert_align,             "ltsTextBlockGetVertAlign");
    LoadProc(lts_text_block_get_horz_align,             "ltsTextBlockGetHorzAlign");
    LoadProc(lts_text_block_get_clipping,               "ltsTextBlockGetClipping");
    LoadProc(lts_text_block_get_color,                  "ltsTextBlockGetColor");
    LoadProc(lts_text_block_get_font,                   "ltsTextBlockGetFont");
    LoadProc(lts_text_block_set_top,                    "ltsTextBlockSetTop");
    LoadProc(lts_text_block_set_left,                   "ltsTextBlockSetLeft");
    LoadProc(lts_text_block_set_vert_align,             "ltsTextBlockSetVertAlign");
    LoadProc(lts_text_block_set_horz_align,             "ltsTextBlockSetHorzAlign");
    LoadProc(lts_text_block_set_clipping,               "ltsTextBlockSetClipping");
    LoadProc(lts_text_block_set_color,                  "ltsTextBlockSetColor");
    LoadProc(lts_text_block_set_font,                   "ltsTextBlockSetFont");
    LoadProc(lts_text_block_get_actual_height,          "ltsTextBlockGetActualHeight");
    LoadProc(lts_text_block_get_text_width_a,           "ltsTextBlockGetTextWidthA");
    LoadProc(lts_text_block_get_text_width_w,           "ltsTextBlockGetTextWidthW");
    LoadProc(lts_text_block_text_out_a,                 "ltsTextBlockTextOutA");
    LoadProc(lts_text_block_text_out_w,                 "ltsTextBlockTextOutW");
    LoadProc(lts_text_block_destroy,                    "ltsTextBlockDestroy");
    
    LoadProc(lts_image_create,                          "ltsImageCreate");
    LoadProc(lts_image_is_empty,                        "ltsImageIsEmpty");
    LoadProc(lts_image_get_width,                       "ltsImageGetWidth");
    LoadProc(lts_image_get_height,                      "ltsImageGetHeight");
    LoadProc(lts_image_get_line_size,                   "ltsImageGetLineSize");
    LoadProc(lts_image_get_data_size,                   "ltsImageGetDataSize");
    LoadProc(lts_image_get_format,                      "ltsImageGetFormat");
    LoadProc(lts_image_get_data,                        "ltsImageGetData");
    LoadProc(lts_image_get_scanline,                    "ltsImageGetScanline");
    LoadProc(lts_image_get_pixel_at,                    "ltsImageGetPixelAt");
    LoadProc(lts_image_assign,                          "ltsImageAssign");
    LoadProc(lts_image_create_empty,                    "ltsImageCreateEmpty");
    LoadProc(lts_image_load_from_func,                  "ltsImageLoadFromFunc");
    LoadProc(lts_image_resize,                          "ltsImageResize");
    LoadProc(lts_image_fill_color,                      "ltsImageFillColor");
    LoadProc(lts_image_fill_pattern,                    "ltsImageFillPattern");
    LoadProc(lts_image_blend,                           "ltsImageBlend");
    LoadProc(lts_image_blur,                            "ltsImageBlur");
    LoadProc(lts_image_destroy,                         "ltsImageDestroy");
    
    LoadProc(lts_post_processor_add_range,              "ltsPostProcessorAddRange");
    LoadProc(lts_post_processor_add_chars,              "ltsPostProcessorAddChars");
    LoadProc(lts_post_processor_clear_ranges,           "ltsPostProcessorClearRanges");
    LoadProc(lts_post_processor_execute,                "ltsPostProcessorExecute");
    LoadProc(lts_post_processor_fill_color_create,      "ltsPostProcessorFillColorCreate");
    LoadProc(lts_post_processor_fill_pattern_create,    "ltsPostProcessorFillPatterCreate");
    LoadProc(lts_post_processor_border_create,          "ltsPostProcessorBorderCreate");
    LoadProc(lts_post_processor_shadow_create,          "ltsPostProcessorShadowCreate");
    LoadProc(lts_post_processor_custom_create,          "ltsPostProcessorCustomCreate");
    LoadProc(lts_post_processor_destroy,                "ltsPostProcessorDestroy");
    
    LoadProc(lts_char_get_char_code,                    "ltsCharGetCharCode");
    LoadProc(lts_char_get_glyph_metric,                 "ltsCharGetGlyphMetric");
    LoadProc(lts_char_set_glyph_metric,                 "ltsCharSetGlyphMetric");
    
    LoadProc(lts_initialize_intern,                     "ltsInitialize");
    LoadProc(lts_get_version,                           "ltsGetVersion");
    LoadProc(lts_get_last_error_code,                   "ltsGetLastErrorCode");
    LoadProc(lts_get_last_error_msg,                    "ltsGetLastErrorMsg");
    LoadProc(lts_finalize_intern,                       "ltsFinalize");

    return lts_initialize_intern();
}

int lts_finalize(void)
{
    lts_error_code_t err = lts_finalize_intern();

    lts_context_create                      = NULL;
    lts_context_get_code_page               = NULL;
    lts_context_get_default_char            = NULL;
    lts_context_set_code_page               = NULL;
    lts_context_set_default_char            = NULL;
    lts_context_ansi_to_wide                = NULL;
    lts_context_destroy                     = NULL;
    
    lts_renderer_create                     = NULL;
    lts_renderer_create_custom              = NULL;
    lts_renderer_begin_block                = NULL;
    lts_renderer_end_block                  = NULL;
    lts_renderer_abort_block                = NULL;
    lts_renderer_get_text_width_a           = NULL;
    lts_renderer_get_text_width_w           = NULL;
    lts_renderer_destroy                    = NULL;
        
    lts_font_creator_create                 = NULL;
    lts_font_creator_get_font_by_name       = NULL;
    lts_font_creator_get_font_by_file       = NULL;
    lts_font_creator_get_font_by_stream     = NULL;
    lts_font_creator_destroy                = NULL;
    
    lts_font_get_post_processor             = NULL;
    lts_font_get_tab_width                  = NULL;
    lts_font_get_char_spacing               = NULL;
    lts_font_get_line_spacing               = NULL;
    lts_font_get_metric                     = NULL;
    lts_font_get_fontname                   = NULL;
    lts_font_get_facename                   = NULL;
    lts_font_get_stylename                  = NULL;
    lts_font_get_fillname                   = NULL;
    lts_font_get_copyright                  = NULL;
    lts_font_set_post_processor             = NULL;
    lts_font_set_tab_width                  = NULL;
    lts_font_set_char_spacing               = NULL;
    lts_font_set_line_spacing               = NULL;
    lts_font_destroy                        = NULL;
    
    lts_text_block_get_rect                 = NULL;
    lts_text_block_get_width                = NULL;
    lts_text_block_get_height               = NULL;
    lts_text_block_get_flags                = NULL;
    lts_text_block_get_top                  = NULL;
    lts_text_block_get_left                 = NULL;
    lts_text_block_get_vert_align           = NULL;
    lts_text_block_get_horz_align           = NULL;
    lts_text_block_get_clipping             = NULL;
    lts_text_block_get_color                = NULL;
    lts_text_block_get_font                 = NULL;
    lts_text_block_set_top                  = NULL;
    lts_text_block_set_left                 = NULL;
    lts_text_block_set_vert_align           = NULL;
    lts_text_block_set_horz_align           = NULL;
    lts_text_block_set_clipping             = NULL;
    lts_text_block_set_color                = NULL;
    lts_text_block_set_font                 = NULL;
    lts_text_block_get_actual_height        = NULL;
    lts_text_block_get_text_width_a         = NULL;
    lts_text_block_get_text_width_w         = NULL;
    lts_text_block_text_out_a               = NULL;
    lts_text_block_text_out_w               = NULL;
    lts_text_block_destroy                  = NULL;
    
    lts_image_create                        = NULL;
    lts_image_is_empty                      = NULL;
    lts_image_get_width                     = NULL;
    lts_image_get_height                    = NULL;
    lts_image_get_line_size                 = NULL;
    lts_image_get_data_size                 = NULL;
    lts_image_get_format                    = NULL;
    lts_image_get_data                      = NULL;
    lts_image_get_scanline                  = NULL;
    lts_image_get_pixel_at                  = NULL;
    lts_image_assign                        = NULL;
    lts_image_create_empty                  = NULL;
    lts_image_load_from_func                = NULL;
    lts_image_resize                        = NULL;
    lts_image_fill_color                    = NULL;
    lts_image_fill_pattern                  = NULL;
    lts_image_blend                         = NULL;
    lts_image_blur                          = NULL;
    lts_image_destroy                       = NULL;
    
    lts_post_processor_add_range            = NULL;
    lts_post_processor_add_chars            = NULL;
    lts_post_processor_clear_ranges         = NULL;
    lts_post_processor_execute              = NULL;
    lts_post_processor_fill_color_create    = NULL;
    lts_post_processor_fill_pattern_create  = NULL;
    lts_post_processor_border_create        = NULL;
    lts_post_processor_shadow_create        = NULL;
    lts_post_processor_custom_create        = NULL;
    lts_post_processor_destroy              = NULL;
    
    lts_char_get_char_code                  = NULL;
    lts_char_get_glyph_metric               = NULL;
    lts_char_set_glyph_metric               = NULL;
    
    lts_initialize_intern                   = NULL;
    lts_get_version                         = NULL;
    lts_get_last_error_code                 = NULL;
    lts_get_last_error_msg                  = NULL;
    lts_finalize_intern                     = NULL;
    
    if (!close_lib(handle))
        return ltsErrInvalidLibHandle;
    return err;
}

#endif /* LIB_TEXT_SUITE_H */