[#105] Fixed shaders by using extensions properly and enabled them on CPU

Signed-off-by: Tobias Frisch <tfrisch@uni-koblenz.de>

projects/indirect_draw/resources/shaders/shader.frag

@@ -14,5 +14,5 @@ layout(set=0, binding=2) uniform texture2D baseColorTex[];
 
 void main()
 {
-    outColor = texture(sampler2D(baseColorTex[passDrawIndex], standardSampler), passUV).rgb;
+    outColor = texture(sampler2D(baseColorTex[nonuniformEXT(passDrawIndex)], standardSampler), passUV).rgb;
 }
\ No newline at end of file

projects/indirect_draw/resources/shaders/shader.vert

 #version 460
 #extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shader_draw_parameters : enable
 
 layout(location = 0) in vec3 inPosition;
 layout(location = 1) in vec3 inNormal;

projects/indirect_draw/src/main.cpp

@@ -268,6 +268,7 @@ int main(int argc, const char** argv) {
         features.setMultiDrawIndirect(true);
     });
 
+	features.requireExtension(VK_KHR_SHADER_DRAW_PARAMETERS_EXTENSION_NAME);
     features.requireExtension(VK_EXT_DESCRIPTOR_INDEXING_EXTENSION_NAME);
     features.requireExtensionFeature<vk::PhysicalDeviceDescriptorIndexingFeatures>(
             VK_EXT_DESCRIPTOR_INDEXING_EXTENSION_NAME, [](vk::PhysicalDeviceDescriptorIndexingFeatures &features) {