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Blend Locking

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Lol read the comment... This is to give overlapping translucent drawing in an
area even translucency.
This commit is contained in:
James R 2020-01-03 02:20:56 -08:00
parent c6aec51d99
commit 845853f000
2 changed files with 53 additions and 0 deletions
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50
src/v_video.c
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@ -484,6 +484,56 @@ void VID_BlitLinearScreen(const UINT8 *srcptr, UINT8 *destptr, INT32 width, INT3
#endif
}
/*
Blend Locking
This is a fancy name for something really simple; Use a secondary buffer for
blending translucent pixels. This is for overlapping translucent drawing.
*/
static UINT8 *v_blendscreen;
void
V_LockBlend (
int x,
int y,
int w,
int h,
int flags
){
/* Now I too can say I picked on OpenGL at school today... */
if (rendermode == render_soft)
{
/*
This used to be a bunch of fucking shit until
I realized screens[1] can probably be used.
*/
if (!( flags & V_NOSCALESTART ))
{
x *= vid.dupx;
w *= vid.dupx;
y *= vid.dupy;
h *= vid.dupy;
}
x = y * vid.width + x;
VID_BlitLinearScreen(
screens[0] + x,
screens[1] + x,
w,
h,
vid.width,
vid.width
);
v_blendscreen = screens[1];
}
}
void
V_UnlockBlend (void)
{
v_blendscreen = screens[0];
}
static UINT8 hudplusalpha[11] = { 10, 8, 6, 4, 2, 0, 0, 0, 0, 0, 0};
static UINT8 hudminusalpha[11] = { 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5};

3
src/v_video.h
View file

@ -244,4 +244,7 @@ void V_DrawPatchFill(patch_t *pat);
void VID_BlitLinearScreen(const UINT8 *srcptr, UINT8 *destptr, INT32 width, INT32 height, size_t srcrowbytes,
size_t destrowbytes);
void V_LockBlend (int x, int y, int w, int h, int flags);
void V_UnlockBlend (void);
#endif