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Directly load Swiftshader if no Vulkan driver is available 

This may be a short term solution before linking our own version
of the Vulkan Loader.

Bug: dawn:283
Change-Id: Ifeddeaa5170bccc912c61059071a83c2b5fd9524
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/15121
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
This commit is contained in:
Austin Eng 2020-01-16 00:34:30 +00:00 committed by Commit Bot service account
parent 0d6619848d
commit 636e6cee4f
3 changed files with 47 additions and 10 deletions
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11
BUILD.gn
View File

@ -543,9 +543,14 @@ source_set("libdawn_native_sources") {
}
if (use_swiftshader) {
data_deps += [ "${dawn_swiftshader_dir}/src/Vulkan:icd_file" ]
defines +=
[ "DAWN_SWIFTSHADER_VK_ICD_JSON=\"${swiftshader_icd_file_name}\"" ]
data_deps += [
"${dawn_swiftshader_dir}/src/Vulkan:icd_file",
"${dawn_swiftshader_dir}/src/Vulkan:swiftshader_libvulkan",
]
defines += [
"DAWN_ENABLE_SWIFTSHADER",
"DAWN_SWIFTSHADER_VK_ICD_JSON=\"${swiftshader_icd_file_name}\"",
]
}
}

45
src/dawn_native/vulkan/BackendVk.cpp
View File

@ -21,16 +21,31 @@
#include "dawn_native/vulkan/AdapterVk.h"
#include "dawn_native/vulkan/VulkanError.h"
// TODO(crbug.com/dawn/283): Link against the Vulkan Loader and remove this.
#if defined(DAWN_ENABLE_SWIFTSHADER)
# if defined(DAWN_PLATFORM_LINUX) || defined(DAWN_PLATFORM_FUSCHIA)
constexpr char kSwiftshaderLibName[] = "libvk_swiftshader.so";
# elif defined(DAWN_PLATFORM_WINDOWS)
constexpr char kSwiftshaderLibName[] = "vk_swiftshader.dll";
# elif defined(DAWN_PLATFORM_MAC)
constexpr char kSwiftshaderLibName[] = "libvk_swiftshader.dylib";
# else
# error "Unimplemented Swiftshader Vulkan backend platform"
# endif
#endif
#if defined(DAWN_PLATFORM_LINUX)
# if defined(DAWN_PLATFORM_ANDROID)
const char kVulkanLibName[] = "libvulkan.so";
constexpr char kVulkanLibName[] = "libvulkan.so";
# else
const char kVulkanLibName[] = "libvulkan.so.1";
constexpr char kVulkanLibName[] = "libvulkan.so.1";
# endif
#elif defined(DAWN_PLATFORM_WINDOWS)
const char kVulkanLibName[] = "vulkan-1.dll";
constexpr char kVulkanLibName[] = "vulkan-1.dll";
#elif defined(DAWN_PLATFORM_FUCHSIA)
const char kVulkanLibName[] = "libvulkan.so";
constexpr char kVulkanLibName[] = "libvulkan.so";
#elif defined(DAWN_ENABLE_SWIFTSHADER)
const char* kVulkanLibName = kSwiftshaderLibName;
#else
# error "Unimplemented Vulkan backend platform"
#endif
@ -66,7 +81,7 @@ namespace dawn_native { namespace vulkan {
return mGlobalInfo;
}
MaybeError Backend::Initialize() {
MaybeError Backend::LoadVulkan() {
#if defined(DAWN_ENABLE_VULKAN_VALIDATION_LAYERS)
if (GetInstance()->IsBackendValidationEnabled()) {
std::string vkDataDir = GetExecutableDirectory() + DAWN_VK_DATA_DIR;
@ -83,9 +98,25 @@ namespace dawn_native { namespace vulkan {
}
#endif
if (!mVulkanLib.Open(kVulkanLibName)) {
return DAWN_DEVICE_LOST_ERROR(std::string("Couldn't open ") + kVulkanLibName);
if (mVulkanLib.Open(kVulkanLibName)) {
return {};
}
dawn::WarningLog() << std::string("Couldn't open ") + kVulkanLibName;
#if defined(DAWN_ENABLE_SWIFTSHADER)
if (strcmp(kVulkanLibName, kSwiftshaderLibName) != 0) {
if (mVulkanLib.Open(kSwiftshaderLibName)) {
return {};
}
dawn::WarningLog() << std::string("Couldn't open ") + kSwiftshaderLibName;
}
#endif
return DAWN_DEVICE_LOST_ERROR("Couldn't load Vulkan");
}
MaybeError Backend::Initialize() {
DAWN_TRY(LoadVulkan());
DAWN_TRY(mFunctions.LoadGlobalProcs(mVulkanLib));

1
src/dawn_native/vulkan/BackendVk.h
View File

@ -37,6 +37,7 @@ namespace dawn_native { namespace vulkan {
std::vector<std::unique_ptr<AdapterBase>> DiscoverDefaultAdapters() override;
private:
MaybeError LoadVulkan();
ResultOrError<VulkanGlobalKnobs> CreateInstance();
MaybeError RegisterDebugReport();