png支持

shaders/textured_quad.vert

@@ -0,0 +1,19 @@
+#version 450
+
+layout(push_constant) uniform PushConstants {
+    mat4 model;
+    vec4 color;
+} pc;
+
+layout(location = 0) in vec2 a_position;
+layout(location = 1) in vec4 a_color;
+layout(location = 2) in vec2 a_uv;
+
+layout(location = 0) out vec4 v_color;
+layout(location = 1) out vec2 v_uv;
+
+void main() {
+    gl_Position = pc.model * vec4(a_position, 0.0, 1.0);
+    v_color = a_color * pc.color;
+    v_uv = a_uv;
+}