[wxWidgets.git] / src / freetype / raster1 / ftrend1.c

/***************************************************************************/
/*                                                                         */
/*  ftrend1.c                                                              */
/*                                                                         */
/*    The FreeType glyph rasterizer interface (body).                      */
/*                                                                         */
/*  Copyright 1996-2000 by                                                 */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/


#include <freetype/internal/ftobjs.h>
#include <freetype/ftoutln.h>


#ifdef FT_FLAT_COMPILE

#include "ftrend1.h"
#include "ftraster.h"

#else

#include <raster1/ftrend1.h>
#include <raster1/ftraster.h>

#endif


  /* initialize renderer -- init its raster */
  static
  FT_Error  ft_raster1_init( FT_Renderer  render )
  {
    FT_Library  library = FT_MODULE_LIBRARY( render );


    render->clazz->raster_class->raster_reset( render->raster,
                                               library->raster_pool,
                                               library->raster_pool_size );

    return FT_Err_Ok;
  }


  /* set render-specific mode */
  static
  FT_Error  ft_raster1_set_mode( FT_Renderer  render,
                                 FT_ULong     mode_tag,
                                 FT_Pointer   data )
  {
    /* we simply pass it to the raster */
    return render->clazz->raster_class->raster_set_mode( render->raster,
                                                         mode_tag,
                                                         data );
  }


  /* transform a given glyph image */
  static
  FT_Error  ft_raster1_transform( FT_Renderer   render,
                                  FT_GlyphSlot  slot,
                                  FT_Matrix*    matrix,
                                  FT_Vector*    delta )
  {
    FT_Error error = FT_Err_Ok;


    if ( slot->format != render->glyph_format )
    {
      error = FT_Err_Invalid_Argument;
      goto Exit;
    }

    if ( matrix )
      FT_Outline_Transform( &slot->outline, matrix );

    if ( delta )
      FT_Outline_Translate( &slot->outline, delta->x, delta->y );

  Exit:
    return error;
  }


  /* return the glyph's control box */
  static
  void  ft_raster1_get_cbox( FT_Renderer   render,
                             FT_GlyphSlot  slot,
                             FT_BBox*      cbox )
  {
    MEM_Set( cbox, 0, sizeof ( *cbox ) );

    if ( slot->format == render->glyph_format )
      FT_Outline_Get_CBox( &slot->outline, cbox );
  }


  /* convert a slot's glyph image into a bitmap */
  static
  FT_Error  ft_raster1_render( FT_Renderer   render,
                               FT_GlyphSlot  slot,
                               FT_UInt       mode,
                               FT_Vector*    origin )
  {
    FT_Error     error;
    FT_Outline*  outline;
    FT_BBox      cbox;
    FT_UInt      width, height, pitch;
    FT_Bitmap*   bitmap;
    FT_Memory    memory;

    FT_Raster_Params  params;


    /* check glyph image format */
    if ( slot->format != render->glyph_format )
    {
      error = FT_Err_Invalid_Argument;
      goto Exit;
    }

    /* check rendering mode */
    if ( mode != ft_render_mode_mono )
    {
      /* raster1 is only capable of producing monochrome bitmaps */
      if ( render->clazz == &ft_raster1_renderer_class )
        return FT_Err_Cannot_Render_Glyph;
    }
    else
    {
      /* raster5 is only capable of producing 5-gray-levels bitmaps */
      if ( render->clazz == &ft_raster5_renderer_class )
        return FT_Err_Cannot_Render_Glyph;
    }

    outline = &slot->outline;

    /* translate the outline to the new origin if needed */
    if ( origin )
      FT_Outline_Translate( outline, origin->x, origin->y );

    /* compute the control box, and grid fit it */
    FT_Outline_Get_CBox( outline, &cbox );

    cbox.xMin &= -64;
    cbox.yMin &= -64;
    cbox.xMax  = ( cbox.xMax + 63 ) & -64;
    cbox.yMax  = ( cbox.yMax + 63 ) & -64;

    width  = ( cbox.xMax - cbox.xMin ) >> 6;
    height = ( cbox.yMax - cbox.yMin ) >> 6;
    bitmap = &slot->bitmap;
    memory = render->root.memory;

    /* release old bitmap buffer */
    if ( slot->flags & ft_glyph_own_bitmap )
    {
      FREE( bitmap->buffer );
      slot->flags &= ~ft_glyph_own_bitmap;
    }

    /* allocate new one, depends on pixel format */
    if ( !( mode & ft_render_mode_mono ) )
    {
      /* we pad to 32 bits, only for backwards compatibility with FT 1.x */
      pitch = ( width + 3 ) & -4;
      bitmap->pixel_mode = ft_pixel_mode_grays;
      bitmap->num_grays  = 256;
    }
    else
    {
      pitch = ( width + 7 ) >> 3;
      bitmap->pixel_mode = ft_pixel_mode_mono;
    }

    bitmap->width = width;
    bitmap->rows  = height;
    bitmap->pitch = pitch;

    if ( ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) )
      goto Exit;

    slot->flags |= ft_glyph_own_bitmap;

    /* translate outline to render it into the bitmap */
    FT_Outline_Translate( outline, -cbox.xMin, -cbox.yMin );

    /* set up parameters */
    params.target = bitmap;
    params.source = outline;
    params.flags  = 0;

    if ( bitmap->pixel_mode == ft_pixel_mode_grays )
      params.flags |= ft_raster_flag_aa;

    /* render outline into the bitmap */
    error = render->raster_render( render->raster, &params );
    if ( error )
      goto Exit;

    slot->format      = ft_glyph_format_bitmap;
    slot->bitmap_left = cbox.xMin >> 6;
    slot->bitmap_top  = cbox.yMax >> 6;

  Exit:
    return error;
  }


  const FT_Renderer_Class  ft_raster1_renderer_class =
  {
    {
      ft_module_renderer,
      sizeof( FT_RendererRec ),

      "raster1",
      0x10000L,
      0x20000L,

      0,    /* module specific interface */

      (FT_Module_Constructor)ft_raster1_init,
      (FT_Module_Destructor) 0,
      (FT_Module_Requester)  0
    },

    ft_glyph_format_outline,

    (FTRenderer_render)   ft_raster1_render,
    (FTRenderer_transform)ft_raster1_transform,
    (FTRenderer_getCBox)  ft_raster1_get_cbox,
    (FTRenderer_setMode)  ft_raster1_set_mode,

    (FT_Raster_Funcs*)    &ft_standard_raster
  };


  /* this renderer is _NOT_ part of the default modules, you'll need */
  /* to register it by hand in your application.  It should only be  */
  /* used for backwards-compatibility with FT 1.x anyway.            */
  const FT_Renderer_Class  ft_raster5_renderer_class =
  {
    {
      ft_module_renderer,
      sizeof( FT_RendererRec ),

      "raster5",
      0x10000L,
      0x20000L,

      0,    /* module specific interface */

      (FT_Module_Constructor)ft_raster1_init,
      (FT_Module_Destructor) 0,
      (FT_Module_Requester)  0
    },

    ft_glyph_format_outline,

    (FTRenderer_render)   ft_raster1_render,
    (FTRenderer_transform)ft_raster1_transform,
    (FTRenderer_getCBox)  ft_raster1_get_cbox,
    (FTRenderer_setMode)  ft_raster1_set_mode,

    (FT_Raster_Funcs*)    &ft_standard_raster
  };


/* END */
Commit	Line	Data
cabec872 RR	1	/***************************************************************************/
	2	/* */
	3	/* ftrend1.c */
	4	/* */
	5	/* The FreeType glyph rasterizer interface (body). */
	6	/* */
	7	/* Copyright 1996-2000 by */
	8	/* David Turner, Robert Wilhelm, and Werner Lemberg. */
	9	/* */
	10	/* This file is part of the FreeType project, and may only be used, */
	11	/* modified, and distributed under the terms of the FreeType project */
	12	/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
	13	/* this file you indicate that you have read the license and */
	14	/* understand and accept it fully. */
	15	/* */
	16	/***************************************************************************/
	17
	18
	19	#include <freetype/internal/ftobjs.h>
	20	#include <freetype/ftoutln.h>
	21
	22
	23	#ifdef FT_FLAT_COMPILE
	24
	25	#include "ftrend1.h"
	26	#include "ftraster.h"
	27
	28	#else
	29
	30	#include <raster1/ftrend1.h>
	31	#include <raster1/ftraster.h>
	32
	33	#endif
	34
	35
	36	/* initialize renderer -- init its raster */
	37	static
	38	FT_Error ft_raster1_init( FT_Renderer render )
	39	{
	40	FT_Library library = FT_MODULE_LIBRARY( render );
	41
	42
	43	render->clazz->raster_class->raster_reset( render->raster,
	44	library->raster_pool,
	45	library->raster_pool_size );
	46
	47	return FT_Err_Ok;
	48	}
	49
	50
	51	/* set render-specific mode */
	52	static
	53	FT_Error ft_raster1_set_mode( FT_Renderer render,
	54	FT_ULong mode_tag,
	55	FT_Pointer data )
	56	{
	57	/* we simply pass it to the raster */
	58	return render->clazz->raster_class->raster_set_mode( render->raster,
	59	mode_tag,
	60	data );
	61	}
	62
	63
	64	/* transform a given glyph image */
65	static
66	FT_Error ft_raster1_transform( FT_Renderer render,
67	FT_GlyphSlot slot,
68	FT_Matrix* matrix,
69	FT_Vector* delta )
70	{
71	FT_Error error = FT_Err_Ok;
72
73
74	if ( slot->format != render->glyph_format )
75	{
76	error = FT_Err_Invalid_Argument;
77	goto Exit;
78	}
79
80	if ( matrix )
81	FT_Outline_Transform( &slot->outline, matrix );
82
83	if ( delta )
84	FT_Outline_Translate( &slot->outline, delta->x, delta->y );
85
86	Exit:
87	return error;
88	}
89
90
91	/* return the glyph's control box */
92	static
93	void ft_raster1_get_cbox( FT_Renderer render,
94	FT_GlyphSlot slot,
95	FT_BBox* cbox )
96	{
97	MEM_Set( cbox, 0, sizeof ( *cbox ) );
98
99	if ( slot->format == render->glyph_format )
100	FT_Outline_Get_CBox( &slot->outline, cbox );
101	}
102
103
104	/* convert a slot's glyph image into a bitmap */
105	static
106	FT_Error ft_raster1_render( FT_Renderer render,
107	FT_GlyphSlot slot,
108	FT_UInt mode,
109	FT_Vector* origin )
110	{
111	FT_Error error;
112	FT_Outline* outline;
113	FT_BBox cbox;
114	FT_UInt width, height, pitch;
115	FT_Bitmap* bitmap;
116	FT_Memory memory;
117
118	FT_Raster_Params params;
119
120
121	/* check glyph image format */
122	if ( slot->format != render->glyph_format )
123	{
124	error = FT_Err_Invalid_Argument;
125	goto Exit;
126	}
127
128	/* check rendering mode */
129	if ( mode != ft_render_mode_mono )
130	{
131	/* raster1 is only capable of producing monochrome bitmaps */
132	if ( render->clazz == &ft_raster1_renderer_class )
133	return FT_Err_Cannot_Render_Glyph;
134	}
135	else
136	{
137	/* raster5 is only capable of producing 5-gray-levels bitmaps */
138	if ( render->clazz == &ft_raster5_renderer_class )
139	return FT_Err_Cannot_Render_Glyph;
140	}
141
142	outline = &slot->outline;
143
144	/* translate the outline to the new origin if needed */
145	if ( origin )
146	FT_Outline_Translate( outline, origin->x, origin->y );
147
148	/* compute the control box, and grid fit it */
149	FT_Outline_Get_CBox( outline, &cbox );
150
151	cbox.xMin &= -64;
152	cbox.yMin &= -64;
153	cbox.xMax = ( cbox.xMax + 63 ) & -64;
154	cbox.yMax = ( cbox.yMax + 63 ) & -64;
155
156	width = ( cbox.xMax - cbox.xMin ) >> 6;
157	height = ( cbox.yMax - cbox.yMin ) >> 6;
158	bitmap = &slot->bitmap;
159	memory = render->root.memory;
160
161	/* release old bitmap buffer */
162	if ( slot->flags & ft_glyph_own_bitmap )
163	{
164	FREE( bitmap->buffer );
165	slot->flags &= ~ft_glyph_own_bitmap;
166	}
167
168	/* allocate new one, depends on pixel format */
169	if ( !( mode & ft_render_mode_mono ) )
170	{
171	/* we pad to 32 bits, only for backwards compatibility with FT 1.x */
172	pitch = ( width + 3 ) & -4;
173	bitmap->pixel_mode = ft_pixel_mode_grays;
174	bitmap->num_grays = 256;
175	}
176	else
177	{
178	pitch = ( width + 7 ) >> 3;
179	bitmap->pixel_mode = ft_pixel_mode_mono;
180	}
181
182	bitmap->width = width;
183	bitmap->rows = height;
184	bitmap->pitch = pitch;
185
186	if ( ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) )
187	goto Exit;
188
189	slot->flags \|= ft_glyph_own_bitmap;
190
191	/* translate outline to render it into the bitmap */
192	FT_Outline_Translate( outline, -cbox.xMin, -cbox.yMin );
193
194	/* set up parameters */
195	params.target = bitmap;
196	params.source = outline;
197	params.flags = 0;
198
199	if ( bitmap->pixel_mode == ft_pixel_mode_grays )
200	params.flags \|= ft_raster_flag_aa;
201
202	/* render outline into the bitmap */
203	error = render->raster_render( render->raster, &params );
204	if ( error )
205	goto Exit;
206
207	slot->format = ft_glyph_format_bitmap;
208	slot->bitmap_left = cbox.xMin >> 6;
209	slot->bitmap_top = cbox.yMax >> 6;
210
211	Exit:
212	return error;
213	}
214
215
216	const FT_Renderer_Class ft_raster1_renderer_class =
217	{
218	{
219	ft_module_renderer,
220	sizeof( FT_RendererRec ),
221
222	"raster1",
223	0x10000L,
224	0x20000L,
225
226	0, /* module specific interface */
227
228	(FT_Module_Constructor)ft_raster1_init,
229	(FT_Module_Destructor) 0,
230	(FT_Module_Requester) 0
231	},
232
233	ft_glyph_format_outline,
234
235	(FTRenderer_render) ft_raster1_render,
236	(FTRenderer_transform)ft_raster1_transform,
237	(FTRenderer_getCBox) ft_raster1_get_cbox,
238	(FTRenderer_setMode) ft_raster1_set_mode,
239
240	(FT_Raster_Funcs*) &ft_standard_raster
241	};
242
243
244	/* this renderer is _NOT_ part of the default modules, you'll need */
245	/* to register it by hand in your application. It should only be */
246	/* used for backwards-compatibility with FT 1.x anyway. */
247	const FT_Renderer_Class ft_raster5_renderer_class =
248	{
249	{
250	ft_module_renderer,
251	sizeof( FT_RendererRec ),
252
253	"raster5",
254	0x10000L,
255	0x20000L,
256
257	0, /* module specific interface */
258
259	(FT_Module_Constructor)ft_raster1_init,
260	(FT_Module_Destructor) 0,
261	(FT_Module_Requester) 0
262	},
263
264	ft_glyph_format_outline,
265
266	(FTRenderer_render) ft_raster1_render,
267	(FTRenderer_transform)ft_raster1_transform,
268	(FTRenderer_getCBox) ft_raster1_get_cbox,
269	(FTRenderer_setMode) ft_raster1_set_mode,
270
271	(FT_Raster_Funcs*) &ft_standard_raster
272	};
273
274
275	/* END */