Add the shaders

tools/pdsg/shaders/shader.frag

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+#version 460
+      
+layout(location = 0) in vec2 oUV;
+layout(location = 1) in vec4 oColor;
+
+uniform sampler2D tex;
+layout(push_constant) uniform PushData {
+  int alfa;
+} push;
+
+out vec4 FragColor;
+    
+void main() {
+  vec4 tc = texture(tex, oUV);
+  if (push.alfa != 0) {
+    FragColor = vec4(oColor.rgb, tc.a * oColor.a);
+  } else {
+    FragColor = tc * oColor;
+  }
+}

tools/pdsg/shaders/shader.vert

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+#version 460
+  
+layout(location = 0) in vec2 pos;
+layout(location = 1) in vec2 uv;
+layout(location = 2) in vec4 color;
+
+layout(location = 0) out vec2 oUV;
+layout(location = 1) out vec4 oColor;
+
+// Probably forgot about this matrix and
+// searched hours for why the rendering isn't working :/
+layout(set = 0, binding = 0) uniform UBO {
+  mat4 projection;
+} ubo;
+
+void main() {
+    gl_Position = ubo.projection*vec4(pos, 0.0, 1.0);
+    oUV = uv;
+    oColor = color;
+}