Comments (5)
No problem.
Btw. feel free to make a PR with x11-cairo backend (or wayland-cairo - didn't look at the source, so don't know which one 😉) - we're not strict about backend implementations and merge anything what makes sense for future users. Cairo is certainly an interesting backend!
from nuklear.
I think nk_rawfb_drawimage
is incomplete since &rawfb->font_text
is hard coded:
https://github.com/Immediate-Mode-UI/Nuklear/blob/master/demo/x11_rawfb/nuklear_rawfb.h#L1010
I hacked around it like this to make an nk_image_ptr()
test work:
NK_API void
nk_rawfb_drawimage(const struct rawfb_context *rawfb,
const int x, const int y, const int w, const int h,
const struct nk_image *img, const struct nk_color *col)
{
struct nk_rect src_rect;
struct nk_rect dst_rect;
src_rect.x = img->region[0];
src_rect.y = img->region[1];
src_rect.w = img->region[2];
src_rect.h = img->region[3];
dst_rect.x = x;
dst_rect.y = y;
dst_rect.w = w;
dst_rect.h = h;
if (img->handle.ptr == NULL) { // probably a dangerous assumption?
nk_rawfb_stretch_image(&rawfb->fb, &rawfb->font_tex, &dst_rect, &src_rect, &rawfb->scissors, col);
return;
}
struct rawfb_image rimg = {
.pixels = img->handle.ptr,
.w = img->w,
.h = img->h,
.pitch = img->w*sizeof(uint32_t),
.pl = PIXEL_LAYOUT_XBGR_8888,
.format = NK_FONT_ATLAS_RGBA32,
};
nk_rawfb_stretch_image(&rawfb->fb, &rimg, &dst_rect, &src_rect, &rawfb->scissors, &nk_none);
}
Then using it:
void *ptr = <raw RGBA buffer>;
struct nk_image img = nk_image_ptr(ptr);
img.w = w;
img.h = h;
img.region[2] = w;
img.region[3] = h;
nk_image(&ctx, img);
Other bits that tripped me up for a while:
- Pay attention to how
nk_rawfb_int2color
handles byte order on the target platform. The PIXEL_LAYOUT_XBGR_8888 above was necessary for my colors to appear correctly, but YMMV. nk_rawfb_stretch_image
overrides foreground color which is fine for font and buttons, but not for actual images. I had to tweak it to optionally disable the foreground color and transfer pixels unchanged except for alpha blending.struct nk_image
doesn't allow passing through a pitch value even thoughstruct rawfb_image
does support it. So make surepitch == w*sizeof(uint32)
.
from nuklear.
This is great feedback! Could you please make a PR with the suggestions and findings?
The backends are mainly for demonstration purposes as everybody has slightly different needs. Therefore they might be incomplete or less tested. Our main focus is on the library itself (just nuklear.h
), which is backend-agnostic (see our new reviewers guide in readme 😉).
from nuklear.
Will do, but I've hacked around elsewhere too, such as extending nk_rawfb_init for loading other fonts, and adding an endianness check. Something PR-worthy may come out of it eventually!
In my case rawfb is drawing directly to an SDL2 streaming texture, which is then displayed over a window background drawn with the vanilla SDL2 renderer.
from nuklear.
Fwiw, I've failed to get around to doing a PR for rawfb and probably won't now, sorry. Ended up replacing most of the rawfb code with Cairo software rendering: https://github.com/seanpringle/nuklear_cairo
from nuklear.
Related Issues (20)
- Inconsistent grabbing behavior in demos (click and drag property) HOT 8
- Build help with Allegro5 MinGW-64(TDM-Posix-SEH) HOT 2
- Demo headers and nk_ and design choices, oh my! HOT 6
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- Request: create example for showcasing integration with RGFW HOT 2
- How to make own title bar, without using the operating systems HOT 3
- Group margins/alignment Ubuntu HOT 3
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- After set an opened Combo Box to invisible, no response from the entire window.
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- GUI "cards" HOT 6
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- Inputs propagating to windows in background
- No documentation explaining how to convert an nk_rune to a char. HOT 1
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from nuklear.