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Tag Info
Tag Number: 
Tag Type: 
Tag Flash Version: 
Unknown SWF Tag: 
This tag is defined by the Flash documentation by Adobe
Brief Description: 

Define whether CSM text should be used in a previous DefineText, DefineText2 or DefineEditText.

Tag Structure: 
struct swf_csmtextsettings {
	swf_tag			f_tag;		/* 74 */
	unsigned short		f_text_id_ref;
	unsigned		f_use_flag_type : 2;
	unsigned		f_grid_fit : 3;
	unsigned		f_reserved : 3;
	long float		f_thickness;
	long float		f_sharpness;
	unsigned char		f_reserved;

The CSMTextSettings are used to change the rendering mode of glyphs in a DefineText, DefineText2 and DefineEditText.

The f_text_id_ref is a reference to a tag holding some texts which glyphs need to be tweaked with these settings.

The f_use_flag_type defines which of the system (0) or Flash (1) font renderer should be used.

Value Renderer Version
0 System 8
1 Internal Flash Type 8

The f_grid_fit defines whether the glyphs should be moved to fit on a grid (i.e. to look less blurry.)

Value Mode Version
0 No alignment 8
1 Pixel alignment (for left aligned text only — go figure!) 8
2 1/3rd pixel for LCD displays 8

The f_thickness and f_sharpness are used to compute the external and internal cutoff. According to Macromedia they compute these values as follow:

	External Cutoff = ( 0.5 × f_sharpness - f_thickness) × f_font_height
	Internal Cutoff = (-0.5 × f_sharpness - f_thickness) × f_font_height


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