#version 450
#extension GL_EXT_buffer_reference : require

struct Symbol {
  uint x;
  uint top;
  uint width;
};

layout(buffer_reference, std430) readonly buffer SymbolList{ 
	Symbol symbols[];
};

layout(set = 0, binding = 0) uniform UIUniform {
  mat4 screen;
} ubo;

layout(set = 1, binding = 0) uniform FontUniform {
  uint num_symbols;
  uint width;
  uint height;
  uint space_width;
  SymbolList symbol_list;
} font;

layout(location = 0) in vec2 inVertexPosition;
layout(location = 1) in vec3 inPosition;
layout(location = 2) in vec2 inSize;
layout(location = 3) in vec4 inColor;
layout(location = 4) in uint code;

layout(location = 0) out vec4 fragColor;
layout(location = 1) out vec2 fragUV;

void main() {
  fragUV = inVertexPosition;
  fragColor = inColor;
  gl_Position = ubo.screen * vec4(vec3(inVertexPosition * inSize, 0.0) + inPosition, 1.0);
}