NVIDIA Releases GLSL Generator for DescriptorSet Indexed Types NVIDIA recently released an open source sample of a GLSL header generator for DescriptorSet-indexed types in Vulkan. The project demonstrates how to simplify usage of VK_EXT_descriptor_indexing and GL_EXT_nonuniform_qualifier within GLSL. A script generates structure and function overloads to hide the code for indexing descriptor sets of samplers and textures. For example, the tool turns: // BEFORE // we use a big resource table for descriptorset indexing layout(set = 0, binding=0) uniform sampler2D res_tex2Ds[]; // let's make use of GL_EXT_buffer_reference2 layout(buffer_reference, scalar) buffer Material { // we want to be cache efficient uint16_t albedoTex; uint16_t normalTex; ... }; layout(push_constant, scalar) uniform inputData { Material materials; }; // example usage Material mat = materials[idx]; // if idx varies non-uniformly (e.g. raytracing) // our texture fetches can start to look pretty ugly vec4 albedo = texture(res_tex2Ds[nonuniformEXT(uint(mat.albedoTex))], uv); into: // AFTER // where descriptorsets start that are used for indexing #define DIT_DSET_IDX 0 // this file is generated by the lua script #include "sampler_indexed_types.glsl" layout(buffer_reference, scalar) buffer Material { // new types are available // for example: struct sampler2D_u16 { uint16_t idx; } sampler2D_u16 albedoTex; sampler2D_u16 normalTex; ... }; layout(push_constant, scalar) uniform inputData { Material materials; }; // example usage Material mat = materials[idx]; // much nicer looking access vec4 albedo = texture(mat.albedoTex, uv); Check out the blog post for more information and the Github project here. https://ift.tt/eA8V8J

NVIDIA recently released an open source sample of a GLSL header generator for DescriptorSet-indexed types in Vulkan. The project demonstrates how to simplify usage of VK_EXT_descriptor_indexing and GL_EXT_nonuniform_qualifier within GLSL. A script generates structure and function overloads to hide the code for indexing descriptor sets of samplers and textures. For example, the tool turns: // BEFORE // we use a big resource table for descriptorset indexing layout(set = 0, binding=0) uniform sampler2D res_tex2Ds[]; // let's make use of GL_EXT_buffer_reference2 layout(buffer_reference, scalar) buffer Material { // we want to be cache efficient uint16_t albedoTex; uint16_t normalTex; ... }; layout(push_constant, scalar) uniform inputData { Material materials; }; // example usage Material mat = materials[idx]; // if idx varies non-uniformly (e.g. raytracing) // our texture fetches can start to look pretty ugly vec4 albedo = texture(res_tex2Ds[nonuniformEXT(uint(mat.albedoTex))], uv); into: // AFTER // where descriptorsets start that are used for indexing #define DIT_DSET_IDX 0 // this file is generated by the lua script #include "sampler_indexed_types.glsl" layout(buffer_reference, scalar) buffer Material { // new types are available // for example: struct sampler2D_u16 { uint16_t idx; } sampler2D_u16 albedoTex; sampler2D_u16 normalTex; ... }; layout(push_constant, scalar) uniform inputData { Material materials; }; // example usage Material mat = materials[idx]; // much nicer looking access vec4 albedo = texture(mat.albedoTex, uv); Check out the blog post for more information and the Github project here.

from GameDev.net http://bit.ly/2LkXxBo