cmake: unbundle stb (shadps4-emu#1601)

CMakeLists.txt

@@ -117,6 +117,7 @@ find_package(magic_enum 0.9.6 CONFIG)
 find_package(PNG 1.6 MODULE)
 find_package(RenderDoc 1.6.0 MODULE)
 find_package(SDL3 3.1.2 CONFIG)
+find_package(stb MODULE)
 find_package(toml11 4.2.0 CONFIG)
 find_package(tsl-robin-map 1.3.0 CONFIG)
 find_package(VulkanHeaders 1.3.289 CONFIG)
@@ -495,6 +496,8 @@ set(COMMON src/common/logging/backend.cpp
            src/common/slot_vector.h
            src/common/spin_lock.cpp
            src/common/spin_lock.h
+           src/common/stb.cpp
+           src/common/stb.h
            src/common/string_util.cpp
            src/common/string_util.h
            src/common/thread.cpp
@@ -867,7 +870,7 @@ endif()
 create_target_directory_groups(shadps4)
 
 target_link_libraries(shadps4 PRIVATE magic_enum::magic_enum fmt::fmt toml11::toml11 tsl::robin_map xbyak::xbyak Tracy::TracyClient RenderDoc::API FFmpeg::ffmpeg Dear_ImGui gcn half::half ZLIB::ZLIB PNG::PNG)
-target_link_libraries(shadps4 PRIVATE Boost::headers GPUOpen::VulkanMemoryAllocator LibAtrac9 sirit Vulkan::Headers xxHash::xxhash Zydis::Zydis glslang::SPIRV glslang::glslang SDL3::SDL3 pugixml::pugixml)
+target_link_libraries(shadps4 PRIVATE Boost::headers GPUOpen::VulkanMemoryAllocator LibAtrac9 sirit Vulkan::Headers xxHash::xxhash Zydis::Zydis glslang::SPIRV glslang::glslang SDL3::SDL3 pugixml::pugixml stb::headers)
 
 target_compile_definitions(shadps4 PRIVATE IMGUI_USER_CONFIG="imgui/imgui_config.h")
 target_compile_definitions(Dear_ImGui PRIVATE IMGUI_USER_CONFIG="${PROJECT_SOURCE_DIR}/src/imgui/imgui_config.h")

REUSE.toml

@@ -63,7 +63,7 @@ SPDX-FileCopyrightText = "2019-2024 Baldur Karlsson"
 SPDX-License-Identifier = "MIT"
 
 [[annotations]]
-path = "externals/stb_image.h"
+path = "externals/stb/**"
 precedence = "aggregate"
 SPDX-FileCopyrightText = "2017 Sean Barrett"
 SPDX-License-Identifier = "MIT"

cmake/Findstb.cmake

@@ -0,0 +1,19 @@
+# SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+find_path(stb_image_INCLUDE_DIR stb_image.h PATH_SUFFIXES stb)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(stb
+    REQUIRED_VARS stb_image_INCLUDE_DIR
+)
+
+if (stb_FOUND AND NOT TARGET stb::headers)
+    add_library(stb::headers INTERFACE IMPORTED)
+    set_property(TARGET stb::headers PROPERTY
+        INTERFACE_INCLUDE_DIRECTORIES
+            "${stb_image_INCLUDE_DIR}"
+    )
+endif()
+
+mark_as_advanced(stb_image_INCLUDE_DIR)

externals/CMakeLists.txt

@@ -222,3 +222,10 @@ endif()
 
 # GCN Headers
 add_subdirectory(gcn)
+
+# stb
+if (NOT TARGET stb::headers)
+    add_library(stb INTERFACE)
+    target_include_directories(stb INTERFACE stb)
+    add_library(stb::headers ALIAS stb)
+endif()

src/common/stb.cpp

@@ -0,0 +1,7 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#define STB_IMAGE_IMPLEMENTATION
+#define STBI_ONLY_PNG
+#define STBI_NO_STDIO
+#include "common/stb.h"

src/common/stb.h

@@ -0,0 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <stb_image.h>

src/core/file_format/splash.cpp

@@ -5,13 +5,9 @@
 
 #include "common/assert.h"
 #include "common/io_file.h"
+#include "common/stb.h"
 #include "splash.h"
 
-#define STB_IMAGE_IMPLEMENTATION
-#define STBI_ONLY_PNG
-#define STBI_NO_STDIO
-#include "externals/stb_image.h"
-
 bool Splash::Open(const std::filesystem::path& filepath) {
     ASSERT_MSG(filepath.stem().string() != "png", "Unexpected file format passed");
 

src/imgui/renderer/texture_manager.cpp

@@ -4,12 +4,11 @@
 #include <deque>
 #include <utility>
 
-#include <externals/stb_image.h>
-
 #include "common/assert.h"
 #include "common/config.h"
 #include "common/io_file.h"
 #include "common/polyfill_thread.h"
+#include "common/stb.h"
 #include "imgui_impl_vulkan.h"
 #include "texture_manager.h"