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Add command to draw polyline from float*

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Adds a command which passes a pointer to use for a polyline. Skips pushing data to buffer as an array of shorts and back.

Note: Assumes pointer is user managed and lives until frame is complete*
Usage: When an array of floats is already in memory as an array of nk_vec2{x,y}, same call signature as nk_stroke_polyline()

Can improve on programs which have a smaller fixed buffer for commands.
This commit is contained in:
Andersama 2021-10-06 22:47:21 -07:00
parent cd731ae558
commit 3f5e69ef6e
3 changed files with 32 additions and 1 deletions
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11
src/nuklear.h
View File

@ -4203,7 +4203,8 @@ enum nk_command_type {
NK_COMMAND_POLYLINE,
NK_COMMAND_TEXT,
NK_COMMAND_IMAGE,
NK_COMMAND_CUSTOM
NK_COMMAND_CUSTOM,
NK_COMMAND_POLYLINE_FLOAT
};
/* command base and header of every command inside the buffer */
@ -4337,6 +4338,14 @@ struct nk_command_polyline {
struct nk_vec2i points[1];
};
struct nk_command_polyline_float {
struct nk_command header;
struct nk_color color;
unsigned short line_thickness;
unsigned short point_count;
struct nk_vec2 *points;
};
struct nk_command_image {
struct nk_command header;
short x, y;

17
src/nuklear_draw.c
View File

@ -392,6 +392,23 @@ nk_stroke_polyline(struct nk_command_buffer *b, float *points, int point_count,
}
}
NK_API void
nk_stroke_polyline_float(struct nk_command_buffer *b, float *points, int point_count,
float line_thickness, struct nk_color col)
{
nk_size size = 0;
struct nk_command_polyline_float *cmd;
NK_ASSERT(b);
if (!b || col.a == 0 || line_thickness <= 0) return;
size = sizeof(*cmd);
cmd = (struct nk_command_polyline_float*) nk_command_buffer_push(b, NK_COMMAND_POLYLINE_FLOAT, size);
if (!cmd) return;
cmd->color = col;
cmd->point_count = (unsigned short)point_count;
cmd->line_thickness = (unsigned short)line_thickness;
cmd->points = (struct nk_vec2*)points;
}
NK_API void
nk_draw_image(struct nk_command_buffer *b, struct nk_rect r,
const struct nk_image *img, struct nk_color col)
{

5
src/nuklear_vertex.c
View File

@ -1309,6 +1309,11 @@ nk_convert(struct nk_context *ctx, struct nk_buffer *cmds,
const struct nk_command_custom *c = (const struct nk_command_custom*)cmd;
c->callback(&ctx->draw_list, c->x, c->y, c->w, c->h, c->callback_data);
} break;
case NK_COMMAND_POLYLINE_FLOAT: {
const struct nk_command_polyline_float* p = (const struct nk_command_polyline_float*)cmd;
nk_draw_list_stroke_poly_line(&ctx->draw_list,
p->points, p->point_count, p->color, NK_STROKE_OPEN, p->line_thickness, (&ctx->draw_list)->config.line_AA);
} break;
default: break;
}
}