[treeform]

Fixes #32.

toGLSL failed with [Shady] can't figure out type: Uniform[Mat4] on the README/triangle-example vertex shader. Two fixes in shared.nim:

1. Type resolution: typeString only recognized Uniform[float32] and Uniform[int] as hardcoded string cases, so any other wrapped type (Uniform[Mat4], Uniform[Vec2], …) fell through to the error. Now it recurses into the inner type for Uniform, UniformWriteOnly, and Attribute wrappers.

2. Emission: entry-point params wrapped in Uniform were emitted as plain in params (in mat4 MVP;). The examples bind these via glGetUniformLocation, so they are now emitted as uniform globals (uniform mat4 MVP;), reusing the ES3 highp sampler handling and array suffix logic from the global-var path.

The issue's shader now produces:

#version 410
precision highp float;

uniform mat4 MVP;
in vec3 vCol;
in vec3 vPos;
out vec3 vertColor;

void main() {
  gl_Position = MVP * vec4(vPos.x, vPos.y, 0.0, 1.0);
  vertColor = vCol;
}

Added two gold-master regression tests (the issue's vertex shader and a Uniform[float32] fragment param); the gold-master diff is purely additive. nimble test passes, and examples/triangle.nim (which uses this exact pattern and previously failed to compile) now builds.

🤖 Generated with Claude Code