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Basic texture support

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This commit is contained in:
Zachary Levy
2026-04-21 13:01:02 -07:00
parent f85187eff3
commit a4623a13b5
17 changed files with 1375 additions and 216 deletions
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18
draw/shaders/source/base_2d.frag
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@@ -7,6 +7,7 @@ layout(location = 2) in vec4 f_params;
layout(location = 3) in vec4 f_params2;
layout(location = 4) flat in uint f_kind_flags;
layout(location = 5) flat in float f_rotation;
layout(location = 6) flat in vec4 f_uv_rect;
// --- Output ---
layout(location = 0) out vec4 out_color;
@@ -130,6 +131,23 @@ void main() {
d = sdRoundedBox(p_local, b, r);
if ((flags & 1u) != 0u) d = sdf_stroke(d, stroke_px);
// Texture sampling for textured SDF primitives
vec4 shape_color = f_color;
if ((flags & 2u) != 0u) {
// Compute UV from local position and half_size
vec2 p_for_uv = f_local_or_uv;
if (f_rotation != 0.0) {
p_for_uv = apply_rotation(p_for_uv, f_rotation);
}
vec2 local_uv = p_for_uv / b * 0.5 + 0.5;
vec2 uv = mix(f_uv_rect.xy, f_uv_rect.zw, local_uv);
shape_color *= texture(tex, uv);
}
float alpha = sdf_alpha(d, soft);
out_color = vec4(shape_color.rgb, shape_color.a * alpha);
return;
}
else if (kind == 2u) {
// Circle — rotationally symmetric, no rotation needed

4
draw/shaders/source/base_2d.vert
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@@ -12,6 +12,7 @@ layout(location = 2) out vec4 f_params;
layout(location = 3) out vec4 f_params2;
layout(location = 4) flat out uint f_kind_flags;
layout(location = 5) flat out float f_rotation;
layout(location = 6) flat out vec4 f_uv_rect;
// ---------- Uniforms (single block — avoids spirv-cross reordering on Metal) ----------
layout(set = 1, binding = 0) uniform Uniforms {
@@ -29,6 +30,7 @@ struct Primitive {
float _pad; // 28-31: alignment padding
vec4 params; // 32-47: shape params part 1
vec4 params2; // 48-63: shape params part 2
vec4 uv_rect; // 64-79: u_min, v_min, u_max, v_max
};
layout(std430, set = 0, binding = 0) readonly buffer Primitives {
@@ -45,6 +47,7 @@ void main() {
f_params2 = vec4(0.0);
f_kind_flags = 0u;
f_rotation = 0.0;
f_uv_rect = vec4(0.0, 0.0, 1.0, 1.0);
gl_Position = projection * vec4(v_position * dpi_scale, 0.0, 1.0);
} else {
@@ -61,6 +64,7 @@ void main() {
f_params2 = p.params2;
f_kind_flags = p.kind_flags;
f_rotation = p.rotation;
f_uv_rect = p.uv_rect;
gl_Position = projection * vec4(world_pos * dpi_scale, 0.0, 1.0);
}