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uniform buffer rebinding

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This commit is contained in:
Greg Wells
2025-07-01 12:19:26 -04:00
parent 7c5c333fa2
commit f7f5d4b3a4
5 changed files with 46 additions and 16 deletions
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1
projects/apis/metal/src/shader_module/metal_shader_module.h
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@@ -11,6 +11,7 @@ typedef struct metalBindingMap {
GN_ARRAY_LIST(metalBindingMap);
typedef struct metalBindingMaps {
metalBindingMapArrayList uniformBufferMaps;
metalBindingMapArrayList textureMaps;
} metalBindingMaps;

44
projects/apis/metal/src/shader_module/metal_shader_module.m
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@@ -35,6 +35,35 @@ metalBindingMapArrayList loadTextureBindingInformation(spvc_resources resources,
return bindings;
}
metalBindingMapArrayList loadUniformBufferInformation(spvc_resources resources, spvc_compiler compiler, gnShaderModuleStage stage) {
metalBindingMapArrayList bindings = metalBindingMapArrayListCreate();
const spvc_reflected_resource *list = NULL;
size_t count;
spvc_resources_get_resource_list_for_type(resources, SPVC_RESOURCE_TYPE_UNIFORM_BUFFER, &list, &count);
for (int i = 0; i < count; i++){
uint32_t set = spvc_compiler_get_decoration(compiler, list[i].id, SpvDecorationDescriptorSet),
binding = spvc_compiler_get_decoration(compiler, list[i].id, SpvDecorationBinding);
uint32_t realBinding = binding;
// if ((stage & GN_VERTEX_SHADER_MODULE) == GN_VERTEX_SHADER_MODULE)
realBinding += 1;
metalBindingMap map = {
.set = set, .binding = binding,
.metalBindingIndex = realBinding
};
metalBindingMapArrayListAdd(&bindings, map);
spvc_compiler_unset_decoration(compiler, list[i].id, SpvDecorationBinding);
spvc_compiler_set_decoration(compiler, list[i].id, SpvDecorationBinding, realBinding);
}
return bindings;
}
gnReturnCode createMetalShaderModule(gnShaderModule module, gnDevice device, gnShaderModuleInfo shaderModuleInfo) {
module->shaderModule = malloc(sizeof(struct gnPlatformShaderModule_t));
@@ -53,23 +82,13 @@ gnReturnCode createMetalShaderModule(gnShaderModule module, gnDevice device, gnS
spvc_context_create_compiler(context, SPVC_BACKEND_MSL, ir, SPVC_CAPTURE_MODE_COPY, &compiler);
spvc_compiler_create_shader_resources(compiler, &resources);
spvc_resources_get_resource_list_for_type(resources, SPVC_RESOURCE_TYPE_UNIFORM_BUFFER, &list, &count);
for (int i = 0; i < count; i++){
uint32_t set = spvc_compiler_get_decoration(compiler, list[i].id, SpvDecorationDescriptorSet),
binding = spvc_compiler_get_decoration(compiler, list[i].id, SpvDecorationBinding);
if ((shaderModuleInfo.stage & GN_VERTEX_SHADER_MODULE) == GN_VERTEX_SHADER_MODULE)
binding += 1;
spvc_compiler_unset_decoration(compiler, list[i].id, SpvDecorationBinding);
spvc_compiler_set_decoration(compiler, list[i].id, SpvDecorationBinding, binding);
}
spvc_resources_get_resource_list_for_type(resources, SPVC_RESOURCE_TYPE_PUSH_CONSTANT, &list, &count);
for (int i = 0; i < count; i++) {
// TODO: get the buffer index
}
module->shaderModule->maps.uniformBufferMaps = loadUniformBufferInformation(resources, compiler, shaderModuleInfo.stage);
module->shaderModule->maps.textureMaps = loadTextureBindingInformation(resources, compiler);
spvc_compiler_create_compiler_options(compiler, &options);
@@ -116,6 +135,9 @@ gnReturnCode createMetalShaderModule(gnShaderModule module, gnDevice device, gnS
return GN_FAILED_TO_FIND_ENTRY_POINT;
}
printf("%s", result);
NSString* functionName = [NSString stringWithCString:name encoding:NSUTF8StringEncoding];
module->shaderModule->function = [shaderLib newFunctionWithName:functionName];