|
5 registered members (AndrewAMD, SBGuy, Petra, flink, 1 invisible),
699
guests, and 6
spiders. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
clear part of a bmap
#456786
12/09/15 20:09
12/09/15 20:09
|
Joined: Jun 2009
Posts: 2,210
Bavaria, Germany
Kartoffel
OP
Expert
|
OP
Expert
Joined: Jun 2009
Posts: 2,210
Bavaria, Germany
|
Hey there,
I'm looking for a (fast) way to clear a rectangular area of an ARGB8 bmap.
bmap_blit doesn't really work for me because of it's bad performance.
any ideas?
POTATO-MAN saves the day! - Random
|
|
|
Re: clear part of a bmap
[Re: Kartoffel]
#456790
12/10/15 00:54
12/10/15 00:54
|
Malice
Unregistered
|
Malice
Unregistered
|
No sure what you would like to achieve
Few Ideas,
1)Tack a higher layer panel->bmap over the lower panel->bmap (assumes panels)
2) draw a draw_quad over the area.
|
|
|
Re: clear part of a bmap
[Re: ]
#456801
12/10/15 08:14
12/10/15 08:14
|
Joined: Mar 2011
Posts: 3,150
Budapest
sivan
Expert
|
Expert
Joined: Mar 2011
Posts: 3,150
Budapest
|
I think if you check the BMAP struct in atypes.h you can access the actual bytes (maybe called as finalbits) to handle my a loop of memsets (resulting in areay loop length instead of areax*areay). But the BMAP should be locked/unlocked. By the way, bmap_blit() is not okay for bmaps having an alpha channel at all. Please tell me if succeeded, I would use it too. 
Last edited by sivan; 12/10/15 08:15.
|
|
|
Re: clear part of a bmap
[Re: sivan]
#456805
12/10/15 12:41
12/10/15 12:41
|
Joined: Jun 2009
Posts: 2,210
Bavaria, Germany
Kartoffel
OP
Expert
|
OP
Expert
Joined: Jun 2009
Posts: 2,210
Bavaria, Germany
|
well, the problem with bmap_blit is that it's done on the cpu, same with accessing the bmap's content via code. I'm trying to implement a dynamic texture atlas for my own interface system, but I need a fast way (a gpu-side approach, preferrably) for filling (rectangular) areas of a bmap with only transparent pixels.
POTATO-MAN saves the day! - Random
|
|
|
Re: clear part of a bmap
[Re: Reconnoiter]
#456808
12/10/15 13:39
12/10/15 13:39
|
Joined: Jun 2009
Posts: 2,210
Bavaria, Germany
Kartoffel
OP
Expert
|
OP
Expert
Joined: Jun 2009
Posts: 2,210
Bavaria, Germany
|
Thanks for your ideas and suggestions, I'll try messing around with these approaches later and let you know if it works. I guess bmap_process should be the fastest as Superku said. The biggest Problem with this method is that you have to render the whole bmap, even if you're just clearing a small part of it. However, since I'm currently working towards low-res graphics this could be a solution that's good enough.
POTATO-MAN saves the day! - Random
|
|
|
Re: clear part of a bmap
[Re: Kartoffel]
#456813
12/10/15 18:50
12/10/15 18:50
|
Joined: Jun 2009
Posts: 2,210
Bavaria, Germany
Kartoffel
OP
Expert
|
OP
Expert
Joined: Jun 2009
Posts: 2,210
Bavaria, Germany
|
Here's a bmap_process implementation: the shader file "ppBmapClearRect.fx"
const float4 vecSkill1;
//==========
const texture TargetMap;
sampler2D smpTex = sampler_state
{
Texture = <TargetMap>;
MipFilter = Point;
MagFilter = Point;
MinFilter = Point;
AddressU = Clamp;
AddressV = Clamp;
};
//==========
float4 PShader(in float4 vPos : VPOS) : COLOR0
{
if(clamp(vPos.x, vecSkill1.x, vecSkill1.y) != vPos.x || clamp(vPos.y, vecSkill1.z, vecSkill1.w) != vPos.y)
clip(-1);
return float4(0, 0, 0, 0);
}
//==========
technique Tech_PP
{
pass Pass_1
{
AlphaBlendEnable = False;
PixelShader = compile ps_3_0 PShader();
}
}
and the functions
MATERIAL * ppBmapClearRect = { effect = "ppBmapClearRect.fx"; }
//
// clear a rectangular part of a bmap (parameters: size and offset)
void bmap_clear_rect(BMAP * bmap, int size_x, int size_y, int offset_x, int offset_y)
{
ppBmapClearRect->skill1 = floatv(offset_x);
ppBmapClearRect->skill2 = floatv(offset_x + size_x);
ppBmapClearRect->skill3 = floatv(offset_y);
ppBmapClearRect->skill4 = floatv(offset_y + size_y);
bmap_process(bmap, bmap, ppBmapClearRect);
}
// clear a rectangular part of a bmap (parameters: min and max x,y)
void bmap_clear_rect_minmax(BMAP * bmap, int left, int top, int right, int bottom)
{
ppBmapClearRect->skill1 = floatv(left);
ppBmapClearRect->skill2 = floatv(right);
ppBmapClearRect->skill3 = floatv(top);
ppBmapClearRect->skill4 = floatv(bottom);
bmap_process(bmap, bmap, ppBmapClearRect);
}
edit: note that the coordinates start with 0, 0 as the top left corner There are however some things to consider: - there are some issues with bmaps after you used bmap_process (most likely because they somehow stay a rendertarget after the processing is done) This causes the bmap to lose it's content when changing the resolution and sometimes when tabbing out and in to your game in fullscreenmode after you've used bmap_process you can use bmap_to_format(your_bmap, bmap_format(your_bmap)); to force a redraw of your bmap, which will solve this problem. - if your bmap is bigger than your engine window resolution you have to increase the zbuffer scale like so: bmap_zbuffer(bmap_createblack(2048, 2048, 8888));
Last edited by Kartoffel; 12/10/15 18:53.
POTATO-MAN saves the day! - Random
|
|
|
|
