src/ui/lib/escher/shaders/model_renderer/main.frag

#version 450
#extension GL_ARB_separate_shader_objects : enable

layout(location = 0) out vec4 outColor;

// For shadow map generation passes, main() encodes the depth into outColor.
// The encoding scheme differs depending on the specific shadow map technique.
#ifdef SHADOW_MAP_GENERATION_PASS
#ifdef SHADOW_MAP_LIGHTING_PASS
#error SHADOW_MAP_GENERATION_PASS conflicts with SHADOW_MAP_LIGHTING_PASS
#endif
#ifdef NO_SHADOW_LIGHTING_PASS
#error SHADOW_MAP_GENERATION_PASS conflicts with NO_SHADOW_LIGHTING_PASS
#endif
#include "shaders/model_renderer/shadow_map_generation.frag"
#endif  // SHADOW_MAP_GENERATION_PASS

#ifdef SHADOW_MAP_LIGHTING_PASS
#ifdef NO_SHADOW_LIGHTING_PASS
#error SHADOW_MAP_LIGHTING_PASS conflicts with NO_SHADOW_LIGHTING_PASS
#endif
#include "shaders/model_renderer/shadow_map_lighting.frag"
#endif  // SHADOW_MAP_LIGHTING_PASS

#ifdef NO_SHADOW_LIGHTING_PASS
layout(location = 0) in vec2 inUV;
layout(set = 0, binding = 0) uniform PerModel {
  vec2 frag_coord_to_uv_multiplier;
  float time;
};
layout(set = 1, binding = 0) uniform PerObject {
  mat4 model_transform;
  vec4 model_color;
};
layout(set = 1, binding = 1) uniform sampler2D material_tex;

void main() {
  outColor = model_color * texture(material_tex, inUV);
}
#endif  // NO_SHADOW_LIGHTING_PASS


#ifdef SHADOW_VOLUME_EXTRUSION
#define USE_PAPER_SHADER_MESH_INSTANCE 1
#include "shaders/paper/common/use.glsl"
void main() {
  outColor = model_color;
}
#endif  // SHADOW_VOLUME_EXTRUSION