SpanFlags

Macros
#define	SPAN_RGBA   0x01
#define	SPAN_Z   0x02
#define	SPAN_FLAT   0x04
#define	SPAN_XY   0x08
#define	SPAN_MASK   0x10
#define	SPAN_LAMBDA   0x20
#define	SPAN_COVERAGE   0x40

Detailed Description

Special bitflags to describe span data.

In general, the point/line/triangle functions interpolate/emit the attributes specified by swrast->_ActiveAttribs (i.e. FRAT_BIT_* values). Some things don't fit into that, though, so we have these flags.

Macro Definition Documentation

SPAN_COVERAGE

#define SPAN_COVERAGE   0x40

array.coverage[] valid?

Definition at line 56 of file s_span.h.

Referenced by _swrast_write_rgba_span(), line(), and smooth_point().

SPAN_FLAT

#define SPAN_FLAT   0x04

interpMask: flat shading?

Definition at line 52 of file s_span.h.

Referenced by interpolate_int_colors(), and NAME().

SPAN_LAMBDA

#define SPAN_LAMBDA   0x20

array.lambda[] valid?

Definition at line 55 of file s_span.h.

Referenced by interpolate_texcoords(), and line().

SPAN_MASK

#define SPAN_MASK   0x10

was array.mask[] filled in by caller?

Definition at line 54 of file s_span.h.

Referenced by _swrast_Bitmap(), _swrast_write_rgba_span(), clip_span(), and smooth_point().

SPAN_RGBA

#define SPAN_RGBA   0x01

interpMask and arrayMask

Definition at line 50 of file s_span.h.

Referenced by _swrast_alpha_test(), _swrast_blend_span(), _swrast_fog_rgba_span(), _swrast_logicop_rgba_span(), _swrast_mask_rgba_span(), _swrast_span_default_attribs(), _swrast_write_rgba_span(), copy_rgba_pixels(), draw_rgba_pixels(), if(), interpolate_int_colors(), large_point(), line(), NAME(), pixel_point(), shade_texture_span(), smooth_point(), sprite_point(), and zoom_span().

SPAN_XY

#define SPAN_XY   0x08

array.x[], y[] valid?

Definition at line 53 of file s_span.h.

Referenced by _swrast_Bitmap(), _swrast_depth_bounds_test(), _swrast_depth_test_span(), _swrast_get_dest_rgba(), _swrast_stencil_and_ztest_span(), _swrast_write_rgba_span(), clip_span(), large_point(), line(), NAME(), pixel_point(), stipple_polygon_span(), and zoom_span().

SPAN_Z

#define SPAN_Z   0x02

interpMask and arrayMask

Definition at line 51 of file s_span.h.

Referenced by _swrast_span_default_attribs(), _swrast_span_interpolate_z(), _swrast_write_rgba_span(), copy_depth_pixels(), draw_depth_pixels(), large_point(), line(), NAME(), pixel_point(), smooth_point(), sprite_point(), and zoom_span().