Merge pull request #154 from Maldela/atlas

Texture atlas

1 files changed, 27 insertions, 0 deletions

diff --git a/wgpu/src/shader/image.vert b/wgpu/src/shader/image.vert
new file mode 100644
index 00000000..dab53cfe
--- /dev/null
+++ b/wgpu/src/shader/image.vert
@@ -0,0 +1,27 @@
+#version 450
+
+layout(location = 0) in vec2 v_Pos;
+layout(location = 1) in vec2 i_Pos;
+layout(location = 2) in vec2 i_Scale;
+layout(location = 3) in vec2 i_Atlas_Pos;
+layout(location = 4) in vec2 i_Atlas_Scale;
+layout(location = 5) in uint i_Layer;
+
+layout (set = 0, binding = 0) uniform Globals {
+    mat4 u_Transform;
+};
+
+layout(location = 0) out vec3 o_Uv;
+
+void main() {
+    o_Uv = vec3(v_Pos * i_Atlas_Scale + i_Atlas_Pos, i_Layer);
+
+    mat4 i_Transform = mat4(
+        vec4(i_Scale.x, 0.0, 0.0, 0.0),
+        vec4(0.0, i_Scale.y, 0.0, 0.0),
+        vec4(0.0, 0.0, 1.0, 0.0),
+        vec4(i_Pos, 0.0, 1.0)
+    );
+
+    gl_Position = u_Transform * i_Transform * vec4(v_Pos, 0.0, 1.0);
+}