* src/dense/ftdenserend.c: Add 'dense' renderer along with its interface functions. (ft_dense_set_mode, ft_dense_transform, ft_dense_get_cbox, ft_dense_init, ft_dense_done, ft_dense_render)gsoc-anurag-2023-final
parent
f681099918
commit
abce0cab72
1 changed files with 219 additions and 2 deletions
@ -1,3 +1,220 @@ |
||||
/** The 'dense' renderer */ |
||||
/** The 'dense' renderer */ |
||||
|
||||
/* END */ |
||||
#include <freetype/ftoutln.h> |
||||
#include <freetype/internal/ftdebug.h> |
||||
#include <freetype/internal/ftobjs.h> |
||||
#include "ftdenserend.h" |
||||
#include "ftdense.h" |
||||
|
||||
#include "ftdenseerrs.h" |
||||
|
||||
/**************************************************************************
|
||||
* |
||||
* The macro FT_COMPONENT is used in trace mode. It is an implicit |
||||
* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log |
||||
* messages during execution. |
||||
*/ |
||||
#undef FT_COMPONENT |
||||
#define FT_COMPONENT dense |
||||
|
||||
|
||||
|
||||
/**************************************************************************
|
||||
* |
||||
* interface functions |
||||
* |
||||
*/ |
||||
|
||||
/* set render specific modes or attributes */ |
||||
static FT_Error |
||||
ft_dense_set_mode( FT_Renderer render, FT_ULong mode_tag, FT_Pointer data ) |
||||
{ |
||||
/* pass it to the rasterizer */ |
||||
return render->clazz->raster_class->raster_set_mode( render->raster, mode_tag, |
||||
data ); |
||||
} |
||||
|
||||
/* transform the glyph using matrix and/or delta */ |
||||
static FT_Error |
||||
ft_dense_transform( FT_Renderer render, |
||||
FT_GlyphSlot slot, |
||||
const FT_Matrix* matrix, |
||||
const FT_Vector* delta ) |
||||
{ |
||||
|
||||
FT_Error error = FT_Err_Ok; |
||||
|
||||
if ( slot->format != render->glyph_format ) |
||||
{ |
||||
error = FT_THROW( 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 control box of a glyph's outline */ |
||||
static void |
||||
ft_dense_get_cbox( FT_Renderer render, FT_GlyphSlot slot, FT_BBox* cbox ) |
||||
{ |
||||
|
||||
FT_ZERO( cbox ); |
||||
|
||||
if ( slot->format == render->glyph_format ) |
||||
FT_Outline_Get_CBox( &slot->outline, cbox ); |
||||
} |
||||
|
||||
static FT_Error |
||||
ft_dense_init( FT_Renderer render ) |
||||
{ |
||||
return FT_Err_Ok; |
||||
} |
||||
|
||||
static void |
||||
ft_dense_done( FT_Renderer render ) |
||||
{ |
||||
FT_UNUSED( render ); |
||||
} |
||||
|
||||
/* generate bitmap from a glyph's slot image */ |
||||
static FT_Error |
||||
ft_dense_render( FT_Renderer render, |
||||
FT_GlyphSlot slot, |
||||
FT_Render_Mode mode, |
||||
const FT_Vector* origin ) |
||||
{ |
||||
FT_Error error = FT_Err_Ok; |
||||
FT_Outline* outline = &slot->outline; |
||||
FT_Bitmap* bitmap = &slot->bitmap; |
||||
|
||||
/* FT_FREE and FT_ALLOC_MULT macros need a variable named 'memory' */ |
||||
FT_Memory memory = render->root.memory; |
||||
|
||||
FT_Pos x_shift = 0; |
||||
FT_Pos y_shift = 0; |
||||
|
||||
FT_Raster_Params params; |
||||
|
||||
/* check whether slot format is correct before rendering */ |
||||
if ( slot->format != render->glyph_format ) |
||||
{ |
||||
error = FT_THROW( Invalid_Glyph_Format ); |
||||
goto Exit; |
||||
} |
||||
|
||||
/* check mode */ |
||||
if ( mode != FT_RENDER_MODE_NORMAL && |
||||
mode != FT_RENDER_MODE_LIGHT && |
||||
mode != FT_RENDER_MODE_LCD && |
||||
mode != FT_RENDER_MODE_LCD_V ) |
||||
{ |
||||
error = FT_THROW( Cannot_Render_Glyph ); |
||||
goto Exit; |
||||
} |
||||
|
||||
|
||||
/* deallocate the previously allocated bitmap */ |
||||
if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) |
||||
{ |
||||
FT_FREE( bitmap->buffer ); |
||||
slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; |
||||
} |
||||
|
||||
/* preset the bitmap using the glyph's outline */ |
||||
if ( ft_glyphslot_preset_bitmap( slot, mode, origin ) ) |
||||
{ |
||||
error = FT_THROW( Raster_Overflow ); |
||||
goto Exit; |
||||
} |
||||
|
||||
if ( !bitmap->rows || !bitmap->pitch ) |
||||
goto Exit; |
||||
|
||||
|
||||
/* allocate new one */ |
||||
if ( FT_ALLOC_MULT( bitmap->buffer, bitmap->rows, bitmap->pitch ) ) |
||||
goto Exit; |
||||
|
||||
slot->internal->flags |= FT_GLYPH_OWN_BITMAP; |
||||
|
||||
/* Calculate shift in 26.6 format */ |
||||
x_shift = 64 * -slot->bitmap_left; |
||||
y_shift = 64 * -slot->bitmap_top; |
||||
|
||||
if ( bitmap->pixel_mode == FT_PIXEL_MODE_LCD_V ) |
||||
y_shift += 64 * (FT_Int)bitmap->rows / 3; |
||||
else |
||||
y_shift += 64 * (FT_Int)bitmap->rows; |
||||
|
||||
|
||||
if ( origin ) |
||||
{ |
||||
x_shift += origin->x; |
||||
y_shift += origin->y; |
||||
} |
||||
|
||||
/* translate outline to render it into the bitmap */ |
||||
if ( x_shift || y_shift ) |
||||
FT_Outline_Translate( outline, x_shift, y_shift ); |
||||
|
||||
/* set up parameters */ |
||||
params.target = bitmap; |
||||
params.source = outline; |
||||
|
||||
/* render the outline */ |
||||
error = |
||||
render->raster_render( render->raster, (const FT_Raster_Params*)¶ms ); |
||||
|
||||
Exit: |
||||
if ( !error ) |
||||
{ |
||||
/* the glyph is successfully rendered to a bitmap */ |
||||
slot->format = FT_GLYPH_FORMAT_BITMAP; |
||||
} |
||||
else if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) |
||||
{ |
||||
FT_FREE( bitmap->buffer ); |
||||
slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP; |
||||
} |
||||
|
||||
if ( x_shift || y_shift ) |
||||
FT_Outline_Translate( outline, -x_shift, -y_shift ); |
||||
|
||||
return error; |
||||
} |
||||
|
||||
|
||||
FT_DEFINE_RENDERER( |
||||
ft_dense_renderer_class, |
||||
|
||||
FT_MODULE_RENDERER, |
||||
sizeof( FT_RendererRec ), |
||||
|
||||
"dense", |
||||
0x10000L, |
||||
0x20000L, |
||||
|
||||
NULL, |
||||
|
||||
(FT_Module_Constructor)ft_dense_init, |
||||
(FT_Module_Destructor)ft_dense_done, |
||||
(FT_Module_Requester)NULL, |
||||
|
||||
FT_GLYPH_FORMAT_OUTLINE, |
||||
|
||||
(FT_Renderer_RenderFunc)ft_dense_render, /* render_glyph */ |
||||
(FT_Renderer_TransformFunc)ft_dense_transform, /* transform_glyph */ |
||||
(FT_Renderer_GetCBoxFunc)ft_dense_get_cbox, /* get_glyph_cbox */ |
||||
(FT_Renderer_SetModeFunc)ft_dense_set_mode, /* set_mode */ |
||||
|
||||
(FT_Raster_Funcs*)&ft_dense_raster /* raster_class */ |
||||
) |
||||
|
||||
/* END */ |
||||
|
Loading…
Reference in new issue