From d6a37a0f151e390808f196998c48a341bc4c7b60 Mon Sep 17 00:00:00 2001 From: Tim Foley Date: Fri, 12 Mar 2021 11:58:14 -0800 Subject: Add a CPU renderer implementation (#1750) * Add a CPU renderer implementation This change adds a CPU back-end to `gfx` and ensures that most of our existing CPU tests pass when using it. Detailed notes: * Most of the CPU renderer implementation is copy-pasted from the CUDA case, so they share a lot of similar logic * The main addition to the CPU renderer is a semi-complete implementation of host-memory textures. The logic here handles all the main shapes (Buffer, 1D, 2D, 3D, Cube) and all the currently-supported `Format`s that are sample-able as-is (no D24S8). The implementation is not intended to be fast, and it currently only does nearest-neighbor sampling, but otherwise it tries to avoid cutting too many corners and should be ar reasonable starting point for a more complete (but not performance-oriented) implementation. * Refactored the CPU prelude `IRWTexture` interface to inherit from `ITexture`, since in most cases a single type will end up implementing both. It might be worth it to collapse it all down to a single interface later. * Changed the CPU prelude `ITexture`/`IRWTexture` interface so that it takes both a pointer *and* a size for output arguments. This change seems necessary to allow a shader variable declared as a `Texture2D` to fetch a single `float` when the underlying texture might be using RGBA32F. * Added to the `IComponentType` public API so that we can query a "host callable" for an entry point and not just a binary. * Turned off the `-shaderobj` flag on two tests that weren't yet compatible with shader objects but still had the flag left in on the path (since previously the CPU path always used the non-`gfx` non-shader-object logic anyway) * Disabled one test (`dynamic-dispatch-11`) that relied on the `ConstantBuffer` idiom that we know we are planning to chagne soon anyway. * Made a few changes to the CUDA path to bring it into line with what I added for the CPU path. These were mostly bug fixes around indexing logic for sub-objects and resources. * fixup --- tools/gfx/render.cpp | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'tools/gfx/render.cpp') diff --git a/tools/gfx/render.cpp b/tools/gfx/render.cpp index 4ecb52287..e7d30b728 100644 --- a/tools/gfx/render.cpp +++ b/tools/gfx/render.cpp @@ -7,6 +7,7 @@ #include "open-gl/render-gl.h" #include "vulkan/render-vk.h" #include "cuda/render-cuda.h" +#include "cpu/render-cpu.h" #include namespace gfx { @@ -97,6 +98,11 @@ extern "C" return createVKDevice(desc, outDevice); } #endif + case DeviceType::CPU: + { + return createCPUDevice(desc, outDevice); + } + break; default: return SLANG_FAIL; @@ -154,5 +160,4 @@ extern "C" } } - } // renderer_test -- cgit v1.2.3