0,0 → 1,306 |
/***************************************************************************/ |
/* */ |
/* ftrend1.c */ |
/* */ |
/* The FreeType glyph rasterizer interface (body). */ |
/* */ |
/* Copyright 1996-2003, 2005, 2006, 2011, 2013 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. */ |
/* */ |
/***************************************************************************/ |
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#include <ft2build.h> |
#include FT_INTERNAL_DEBUG_H |
#include FT_INTERNAL_OBJECTS_H |
#include FT_OUTLINE_H |
#include "ftrend1.h" |
#include "ftraster.h" |
#include "rastpic.h" |
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#include "rasterrs.h" |
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/* 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 ); |
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return FT_Err_Ok; |
} |
|
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/* 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, |
const FT_Matrix* matrix, |
const FT_Vector* delta ) |
{ |
FT_Error error = FT_Err_Ok; |
|
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if ( slot->format != render->glyph_format ) |
{ |
error = FT_THROW( Invalid_Argument ); |
goto Exit; |
} |
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if ( matrix ) |
FT_Outline_Transform( &slot->outline, matrix ); |
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if ( delta ) |
FT_Outline_Translate( &slot->outline, delta->x, delta->y ); |
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Exit: |
return error; |
} |
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/* return the glyph's control box */ |
static void |
ft_raster1_get_cbox( FT_Renderer render, |
FT_GlyphSlot slot, |
FT_BBox* cbox ) |
{ |
FT_MEM_ZERO( cbox, sizeof ( *cbox ) ); |
|
if ( slot->format == render->glyph_format ) |
FT_Outline_Get_CBox( &slot->outline, cbox ); |
} |
|
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/* convert a slot's glyph image into a bitmap */ |
static FT_Error |
ft_raster1_render( FT_Renderer render, |
FT_GlyphSlot slot, |
FT_Render_Mode mode, |
const 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; |
|
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/* check glyph image format */ |
if ( slot->format != render->glyph_format ) |
{ |
error = FT_THROW( Invalid_Argument ); |
goto Exit; |
} |
|
/* check rendering mode */ |
#ifndef FT_CONFIG_OPTION_PIC |
if ( mode != FT_RENDER_MODE_MONO ) |
{ |
/* raster1 is only capable of producing monochrome bitmaps */ |
if ( render->clazz == &ft_raster1_renderer_class ) |
return FT_THROW( Cannot_Render_Glyph ); |
} |
else |
{ |
/* raster5 is only capable of producing 5-gray-levels bitmaps */ |
if ( render->clazz == &ft_raster5_renderer_class ) |
return FT_THROW( Cannot_Render_Glyph ); |
} |
#else /* FT_CONFIG_OPTION_PIC */ |
/* When PIC is enabled, we cannot get to the class object */ |
/* so instead we check the final character in the class name */ |
/* ("raster5" or "raster1"). Yes this is a hack. */ |
/* The "correct" thing to do is have different render function */ |
/* for each of the classes. */ |
if ( mode != FT_RENDER_MODE_MONO ) |
{ |
/* raster1 is only capable of producing monochrome bitmaps */ |
if ( render->clazz->root.module_name[6] == '1' ) |
return FT_THROW( Cannot_Render_Glyph ); |
} |
else |
{ |
/* raster5 is only capable of producing 5-gray-levels bitmaps */ |
if ( render->clazz->root.module_name[6] == '5' ) |
return FT_THROW( Cannot_Render_Glyph ); |
} |
#endif /* FT_CONFIG_OPTION_PIC */ |
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outline = &slot->outline; |
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/* translate the outline to the new origin if needed */ |
if ( origin ) |
FT_Outline_Translate( outline, origin->x, origin->y ); |
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/* compute the control box, and grid fit it */ |
FT_Outline_Get_CBox( outline, &cbox ); |
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/* undocumented but confirmed: bbox values get rounded */ |
#if 1 |
cbox.xMin = FT_PIX_ROUND( cbox.xMin ); |
cbox.yMin = FT_PIX_ROUND( cbox.yMin ); |
cbox.xMax = FT_PIX_ROUND( cbox.xMax ); |
cbox.yMax = FT_PIX_ROUND( cbox.yMax ); |
#else |
cbox.xMin = FT_PIX_FLOOR( cbox.xMin ); |
cbox.yMin = FT_PIX_FLOOR( cbox.yMin ); |
cbox.xMax = FT_PIX_CEIL( cbox.xMax ); |
cbox.yMax = FT_PIX_CEIL( cbox.yMax ); |
#endif |
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width = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 ); |
height = (FT_UInt)( ( cbox.yMax - cbox.yMin ) >> 6 ); |
|
if ( width > FT_USHORT_MAX || height > FT_USHORT_MAX ) |
{ |
error = FT_THROW( Invalid_Argument ); |
goto Exit; |
} |
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bitmap = &slot->bitmap; |
memory = render->root.memory; |
|
/* release old bitmap buffer */ |
if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) |
{ |
FT_FREE( bitmap->buffer ); |
slot->internal->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 = FT_PAD_CEIL( width, 4 ); |
bitmap->pixel_mode = FT_PIXEL_MODE_GRAY; |
bitmap->num_grays = 256; |
} |
else |
{ |
pitch = ( ( width + 15 ) >> 4 ) << 1; |
bitmap->pixel_mode = FT_PIXEL_MODE_MONO; |
} |
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bitmap->width = width; |
bitmap->rows = height; |
bitmap->pitch = pitch; |
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if ( FT_ALLOC_MULT( bitmap->buffer, pitch, height ) ) |
goto Exit; |
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slot->internal->flags |= FT_GLYPH_OWN_BITMAP; |
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/* translate outline to render it into the bitmap */ |
FT_Outline_Translate( outline, -cbox.xMin, -cbox.yMin ); |
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/* set up parameters */ |
params.target = bitmap; |
params.source = outline; |
params.flags = 0; |
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if ( bitmap->pixel_mode == FT_PIXEL_MODE_GRAY ) |
params.flags |= FT_RASTER_FLAG_AA; |
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/* render outline into the bitmap */ |
error = render->raster_render( render->raster, ¶ms ); |
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FT_Outline_Translate( outline, cbox.xMin, cbox.yMin ); |
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if ( error ) |
goto Exit; |
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slot->format = FT_GLYPH_FORMAT_BITMAP; |
slot->bitmap_left = (FT_Int)( cbox.xMin >> 6 ); |
slot->bitmap_top = (FT_Int)( cbox.yMax >> 6 ); |
|
Exit: |
return error; |
} |
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FT_DEFINE_RENDERER( ft_raster1_renderer_class, |
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FT_MODULE_RENDERER, |
sizeof ( FT_RendererRec ), |
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"raster1", |
0x10000L, |
0x20000L, |
|
0, /* module specific interface */ |
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(FT_Module_Constructor)ft_raster1_init, |
(FT_Module_Destructor) 0, |
(FT_Module_Requester) 0 |
, |
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FT_GLYPH_FORMAT_OUTLINE, |
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(FT_Renderer_RenderFunc) ft_raster1_render, |
(FT_Renderer_TransformFunc)ft_raster1_transform, |
(FT_Renderer_GetCBoxFunc) ft_raster1_get_cbox, |
(FT_Renderer_SetModeFunc) ft_raster1_set_mode, |
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(FT_Raster_Funcs*) &FT_STANDARD_RASTER_GET |
) |
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/* This renderer is _NOT_ part of the default modules; you will need */ |
/* to register it by hand in your application. It should only be */ |
/* used for backwards-compatibility with FT 1.x anyway. */ |
/* */ |
FT_DEFINE_RENDERER( ft_raster5_renderer_class, |
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FT_MODULE_RENDERER, |
sizeof ( FT_RendererRec ), |
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"raster5", |
0x10000L, |
0x20000L, |
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0, /* module specific interface */ |
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(FT_Module_Constructor)ft_raster1_init, |
(FT_Module_Destructor) 0, |
(FT_Module_Requester) 0 |
, |
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FT_GLYPH_FORMAT_OUTLINE, |
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(FT_Renderer_RenderFunc) ft_raster1_render, |
(FT_Renderer_TransformFunc)ft_raster1_transform, |
(FT_Renderer_GetCBoxFunc) ft_raster1_get_cbox, |
(FT_Renderer_SetModeFunc) ft_raster1_set_mode, |
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(FT_Raster_Funcs*) &FT_STANDARD_RASTER_GET |
) |
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/* END */ |