draw_blending.h File Reference

#include <tamtypes.h>

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Data Structures
struct	blend_t

Macros
#define	BLEND_COLOR_SOURCE   0
#define	BLEND_COLOR_DEST   1
#define	BLEND_COLOR_ZERO   2
#define	BLEND_ALPHA_SOURCE   0
#define	BLEND_ALPHA_DEST   1
#define	BLEND_ALPHA_FIXED   2
#define	ALPHA_CORRECT_RGBA32   0
#define	ALPHA_CORRECT_RGBA16   1

Functions
qword_t *	draw_pixel_alpha_control (qword_t *q, int enable)
qword_t *	draw_alpha_blending (qword_t *q, int context, blend_t *blend)
qword_t *	draw_alpha_correction (qword_t *q, int context, int alpha)

Detailed Description

Draw library blending functions

Definition in file draw_blending.h.

Macro Definition Documentation

ALPHA_CORRECT_RGBA16

#define ALPHA_CORRECT_RGBA16   1

Definition at line 24 of file draw_blending.h.

ALPHA_CORRECT_RGBA32

#define ALPHA_CORRECT_RGBA32   0

Alpha Correction

Definition at line 23 of file draw_blending.h.

BLEND_ALPHA_DEST

#define BLEND_ALPHA_DEST   1

Definition at line 19 of file draw_blending.h.

BLEND_ALPHA_FIXED

#define BLEND_ALPHA_FIXED   2

Definition at line 20 of file draw_blending.h.

BLEND_ALPHA_SOURCE

#define BLEND_ALPHA_SOURCE   0

Definition at line 18 of file draw_blending.h.

BLEND_COLOR_DEST

#define BLEND_COLOR_DEST   1

Definition at line 15 of file draw_blending.h.

BLEND_COLOR_SOURCE

#define BLEND_COLOR_SOURCE   0

Alpha Blending

Definition at line 14 of file draw_blending.h.

BLEND_COLOR_ZERO

#define BLEND_COLOR_ZERO   2

Definition at line 16 of file draw_blending.h.

Function Documentation

draw_alpha_blending()

qword_t* draw_alpha_blending	(	qword_t *	q,
		int	context,
		blend_t *	blend
	)

Alpha Blending

Definition at line 20 of file draw_environment.c.

{
 
        PACK_GIFTAG(q, GIF_SET_TAG(1,0,0,0,GIF_FLG_PACKED,1), GIF_REG_AD);
        q++;
        PACK_GIFTAG(q, GS_SET_ALPHA(blend->color1,blend->color2,blend->alpha,
                                                                blend->color3,blend->fixed_alpha), GS_REG_ALPHA + context);
        q++;
 
        return q;
 
}

References blend_t::alpha, blend_t::color1, blend_t::color2, blend_t::color3, context, blend_t::fixed_alpha, GIF_FLG_PACKED, GIF_REG_AD, GIF_SET_TAG, GS_REG_ALPHA, GS_SET_ALPHA, and PACK_GIFTAG.

draw_alpha_correction()

qword_t* draw_alpha_correction	(	qword_t *	q,
		int	context,
		int	alpha
	)

Alpha Correction

Definition at line 176 of file draw_environment.c.

{
 
        PACK_GIFTAG(q, GIF_SET_TAG(1,0,0,0,GIF_FLG_PACKED,1), GIF_REG_AD);
        q++;
 
        PACK_GIFTAG(q,GS_SET_FBA(alpha),GS_REG_FBA + context);
        q++;
 
        return q;
 
}

References context, GIF_FLG_PACKED, GIF_REG_AD, GIF_SET_TAG, GS_REG_FBA, GS_SET_FBA, and PACK_GIFTAG.

draw_pixel_alpha_control()

qword_t* draw_pixel_alpha_control	(	qword_t *	q,
		int	enable
	)

Alpha Blending Per-Pixel MSB Control

Definition at line 8 of file draw_environment.c.

{
 
        PACK_GIFTAG(q, GIF_SET_TAG(1,0,0,0,GIF_FLG_PACKED,1), GIF_REG_AD);
        q++;
        PACK_GIFTAG(q, GS_SET_PABE(enable), GS_REG_PABE);
        q++;
 
        return q;
 
}

References GIF_FLG_PACKED, GIF_REG_AD, GIF_SET_TAG, GS_REG_PABE, GS_SET_PABE, and PACK_GIFTAG.