Fix ImGui.NET.SampleProgram to work with

Vulkan on the latest Vildrid releases

src/ImGui.NET.SampleProgram/ImGuiController.cs

@@ -99,8 +99,8 @@ namespace ImGuiNET
 
             byte[] vertexShaderBytes = LoadEmbeddedShaderCode(gd.ResourceFactory, "imgui-vertex", ShaderStages.Vertex);
             byte[] fragmentShaderBytes = LoadEmbeddedShaderCode(gd.ResourceFactory, "imgui-frag", ShaderStages.Fragment);
-            _vertexShader = factory.CreateShader(new ShaderDescription(ShaderStages.Vertex, vertexShaderBytes, "VS"));
+            _vertexShader = factory.CreateShader(new ShaderDescription(ShaderStages.Vertex, vertexShaderBytes, "main"));
-            _fragmentShader = factory.CreateShader(new ShaderDescription(ShaderStages.Fragment, fragmentShaderBytes, "FS"));
+            _fragmentShader = factory.CreateShader(new ShaderDescription(ShaderStages.Fragment, fragmentShaderBytes, "main"));
 
             VertexLayoutDescription[] vertexLayouts = new VertexLayoutDescription[]
             {

src/ImGui.NET.SampleProgram/Shaders/SPIR-V/imgui-vertex.glsl

@@ -3,17 +3,17 @@
 #extension GL_ARB_separate_shader_objects : enable
 #extension GL_ARB_shading_language_420pack : enable
 
-layout (location = 0) in vec2 vsin_position;
+layout (location = 0) in vec2 in_position;
-layout (location = 1) in vec2 vsin_texCoord;
+layout (location = 1) in vec2 in_texCoord;
-layout (location = 2) in vec4 vsin_color;
+layout (location = 2) in vec4 in_color;
 
-layout (binding = 0) uniform Projection
+layout (binding = 0) uniform ProjectionMatrixBuffer
 {
-    mat4 projection;
+    mat4 projection_matrix;
 };
 
-layout (location = 0) out vec4 vsout_color;
+layout (location = 0) out vec4 color;
-layout (location = 1) out vec2 vsout_texCoord;
+layout (location = 1) out vec2 texCoord;
 
 out gl_PerVertex
 {
@@ -22,8 +22,7 @@ out gl_PerVertex
 
 void main() 
 {
-    gl_Position = projection * vec4(vsin_position, 0, 1);
+    gl_Position = projection_matrix * vec4(in_position, 0, 1);
-    vsout_color = vsin_color;
+    color = in_color;
-    vsout_texCoord = vsin_texCoord;
+    texCoord = in_texCoord;
-    gl_Position.y = -gl_Position.y;
 }