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13 Commits

Author SHA1 Message Date
Moazin Khatti fbdd9f9ba3 Memory allocation for `state' of renderer should be performed 
on the SVG port side not the FT size. Minor doc fixes.
 2019-08-17 20:36:05 +05:00
Moazin Khatti 1f74524929 Let FT handle the memory management for rendering port's state 
and the image buffer.

State has been moved inside the library structure. A new hook
function has been added to query the size needed for the state
structure and this allocation is performed by FT. Memory alloc.
for the image buffer is also being done by FT so that it can later
free it easily.

* include/freetype/svgrenderer.h: Small doc fixes. Addition of two
new hooks. `SVG_Lib_Get_State_Size' and `SVG_Lib_Get_Buffer_Size'.

* src/base/ftglyph.c (FT_Glyph_To_Bitmap): Small bug fix. Memory
was being initialized before library.

* src/base/ftobjs.c (FT_Set_Svg_Hooks): Adjust the code for new
hook functions.

* src/svg/ftsvg.c: Adjust the code for new hook functions. Perform
all memory allocations needed by the rendering port from FreeType
side.

* src/svg/svgtypes.c: Add the new hooks in the hook structure.
 2019-08-17 20:36:05 +05:00
Moazin Khatti de44a3fda8 Store the rendering port's state in library. 
Before this commit, the state of a rendering port was being
held globally. Now, it'll be stored in library->svg_renderer_state.
 2019-08-17 20:36:05 +05:00
Moazin Khatti e028be97b8 Minor fixes. 2019-08-17 20:36:05 +05:00
Moazin Khatti d8202166c0 Add `start_glyph_id' and `end_glyph_id'. 
These two fields are added to `FT_SvgGlyphRec' and
`FT_SVG_DocumentRec'. This is to allow the rendering port to create
a caching mechanism.
 2019-08-17 20:36:05 +05:00
Moazin Khatti e48cf716f8 Add a `units_per_EM' field. 
A field `units_per_EM' is added to `FT_SVG_DocumentRec' and
`FT_SvgGlyphRec'. This is needed because the renderer needs this
info to properly scale the SVGs if the viewbox width and height
differ from `face->units_per_EM'. Face object can't be accessed
because of the restrictions put by `FT_Glyph_To_Bitmap' thus this
has to be provided separately just like `metrics'.
 2019-08-17 20:36:05 +05:00
Moazin Khatti 22988063b0 Minor. Add documentation. 2019-08-17 20:36:05 +05:00
Moazin Khatti 61b1f0b73c Make sure `FT_Set_Svg_Hooks' is exported properly. 2019-08-17 20:36:05 +05:00
Moazin Khatti 294a7ebee2 Adds size information to `FT_SVG_DocumentRec'. 
This is necessary because the document itself contains no
sizing information. Outline glyphs encapsulate the sizing
information in the outlines by scaling them. That is not
possible here. One could access them from the face object
reference inside a glyph slot, but when the function
`FT_Glyph_To_Bitmap' creates a dummy slot it can not put
a face object reference in it. Thus, it's better to store
the size information here.
 2019-08-17 20:36:05 +05:00
Moazin Khatti 0bf6444911 [ot-svg] Create an SVG Document structure for use in `other' field 
of `FT_GlyphSlot'.
 2019-08-17 20:36:05 +05:00
Moazin Khatti 877736d057 Removes trailing white spaces. 2019-08-17 20:36:05 +05:00
Moazin Khatti 479c76c867 [ot-svg] Silly mistake fix. 
Instead of an `FT_Library' instance, `FT_Module' is supposed
to be passed.
 2019-08-17 20:36:05 +05:00
Moazin Khatti 4d59b8535e [ot-svg] Creates hooks mechanism in SVG Renderer. 
* include/freetype/config/ftheader.h: New macro `FT_SVG_RENDERER_H'
for `freetype/svgrenderer.h'.

* include/freetype/svgrenderer.h: New file to store SVG specific
function types, SVG interface and `FT_Set_Svg_Hooks'.

* src/base/ftobjs.c: Adds implementation of `FT_Set_Svg_Hooks'.

* src/svg/ftsvg.c: Creates `svg_renderer_interface'.

* src/svg/svgtypes.c: Moves hook function types to
`FT_SVG_RENDERER_H'. Adds a hook for svg rendering. Temporary.
 2019-08-17 20:36:05 +05:00