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render3d: HUD text, panels and images share a draw - the font stays bound and each vertex says what it reads

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A panel and its label alternated the white and font textures, and every switch closed the overlay's
draw range: 77-91 ranges a frame in town. The font atlas is now bound beside the image texture for the
whole flush, and v carries 4 x the vertex's mode (0 image, 1 font, 2 flat colour) on top of its real
coordinate, so only a different image texture or a clip rectangle closes a range. Town: 24 ranges.
OpenGL frames byte-identical at all five viewpoints; MoltenVK with validation adds no message.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-15 17:14:53 +03:00
parent cdfffa62bb
commit eb1cd3e01a
4 changed files with 33 additions and 21 deletions
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16
packages/ludic.render3d/shaders/overlay.frag
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@ -1,14 +1,20 @@
// 2D overlay: a texture times a colour; the font atlas is white glyphs on alpha
// 2D overlay: an image texture, the font atlas (white glyphs on alpha) or a flat colour, times a
// colour. Which one is the vertex's own: v carries 4 x the mode (0 image, 1 font, 2 flat) on top of
// its real coordinate, so text, panels and an image's quads share a draw (overlay.ludic, ov_use_tex).
in vec2 v_uv;
in vec4 v_col;
uniform sampler2D u_tex;
uniform float u_is_font;
uniform sampler2D u_font;
out vec4 o_color;
void main() {
vec4 t = texture(u_tex, v_uv);
if (u_is_font > 0.5) {
o_color = vec4(v_col.rgb, v_col.a * t.a);
float mode = floor((v_uv.y + 0.5) * 0.25);
vec2 uv = vec2(v_uv.x, v_uv.y - 4.0 * mode);
if (mode > 1.5) {
o_color = v_col;
} else if (mode > 0.5) {
o_color = vec4(v_col.rgb, v_col.a * texture(u_font, uv).a);
} else {
vec4 t = texture(u_tex, uv);
o_color = vec4(v_col.rgb * t.rgb, v_col.a * t.a);
}
}

BIN
packages/ludic.render3d/shaders/spv/1b654972.frag.spv
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16
packages/ludic.render3d/shaders/spv/manifest.txt
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@ -1771,7 +1771,7 @@ U 1b654972 vert u_screen 0 vec2 1 0
I 1b654972 a_pos 0 vec2
I 1b654972 a_uv 1 vec2
I 1b654972 a_col 2 vec4
B 1b654972 frag 1 768
B 1b654972 frag 0 764
U 1b654972 frag u_cascade_vp 0 mat4 5 64
U 1b654972 frag u_cascade_split 320 float 5 16
U 1b654972 frag u_cascade_range 400 float 5 16
@ -1800,14 +1800,14 @@ U 1b654972 frag u_ts_on 748 float 1 0
U 1b654972 frag u_force_cascade 752 int 1 0
U 1b654972 frag u_cloud_shadow 756 float 1 0
U 1b654972 frag u_time 760 float 1 0
U 1b654972 frag u_is_font 764 float 1 0
T 1b654972 u_brdf 2
T 1b654972 u_irradiance 3
T 1b654972 u_prefilter 4
T 1b654972 u_shadow 5
T 1b654972 u_tershadow 6
T 1b654972 u_tex 7
T 1b654972 u_ts_height 8
T 1b654972 u_font 3
T 1b654972 u_irradiance 4
T 1b654972 u_prefilter 5
T 1b654972 u_shadow 6
T 1b654972 u_tershadow 7
T 1b654972 u_tex 8
T 1b654972 u_ts_height 9
P 1fde9cd2 skin.vert model.frag
B 1fde9cd2 vert 0 3344
U 1fde9cd2 vert u_model 0 mat4 1 0