add texture

1 files changed, 17 insertions, 4 deletions

diff --git a/src/shader.wgsl b/src/shader.wgsl
index 9f158f1..c154cc4 100644
--- a/src/shader.wgsl
+++ b/src/shader.wgsl
@@ -1,10 +1,23 @@
+@group(0) @binding(0) var tex_sampler: sampler;
+@group(0) @binding(1) var font_tex:    texture_2d<f32>;
+
+struct VertexOutput {
+	@builtin(position) position: vec4<f32>,
+	@location(0)       uv:       vec2<f32>,
+}
+
 @vertex
-fn vs_main(@builtin(vertex_index) in_vertex_index: u32) -> @builtin(position) vec4<f32> {
+fn vs_main(@builtin(vertex_index) in_vertex_index: u32) -> VertexOutput {
 	let uv = vec2<f32>(f32((in_vertex_index << 1) & 2), f32(in_vertex_index & 2)) / 2.0;
-	return vec4<f32>(uv.x - 0.5, uv.y - 0.5, 0.0, 1.0);
+
+	var out: VertexOutput;
+	out.position = vec4<f32>(uv.x - 0.5, uv.y - 0.5, 0.0, 1.0);
+	out.uv = uv;
+
+	return out;
 }
 
 @fragment
-fn fs_main() -> @location(0) vec4<f32> {
-	return vec4<f32>(1.0, 1.0, 1.0, 1.0);
+fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
+	return vec4<f32>(1.0, 1.0, 1.0, textureSample(font_tex, tex_sampler, in.uv).r);
 }