From 29e2aac69088e3592b1f6c8f3dd14cf1a838bd7a Mon Sep 17 00:00:00 2001
From: nyorain <nyorain@gmail.com>
Date: Mon, 24 Jul 2017 18:30:23 +0200
Subject: [PATCH] Add first vulkan dependency module

---
 mesonbuild/dependencies/__init__.py          |  3 +-
 mesonbuild/dependencies/ui.py                | 55 +++++++++++++++++++-
 test cases/frameworks/17 vulkan/meson.build  |  7 +++
 test cases/frameworks/17 vulkan/vulkanprog.c | 35 +++++++++++++
 4 files changed, 98 insertions(+), 2 deletions(-)
 create mode 100644 test cases/frameworks/17 vulkan/meson.build
 create mode 100644 test cases/frameworks/17 vulkan/vulkanprog.c

diff --git a/mesonbuild/dependencies/__init__.py b/mesonbuild/dependencies/__init__.py
index 3d41a2bd3..f153b976b 100644
--- a/mesonbuild/dependencies/__init__.py
+++ b/mesonbuild/dependencies/__init__.py
@@ -19,7 +19,7 @@ from .base import (  # noqa: F401
 from .dev import GMockDependency, GTestDependency, LLVMDependency, ValgrindDependency
 from .misc import BoostDependency, Python3Dependency, ThreadDependency
 from .platform import AppleFrameworks
-from .ui import GLDependency, GnuStepDependency, Qt4Dependency, Qt5Dependency, SDL2Dependency, WxDependency
+from .ui import GLDependency, GnuStepDependency, Qt4Dependency, Qt5Dependency, SDL2Dependency, WxDependency, VulkanDependency
 
 
 packages.update({
@@ -44,4 +44,5 @@ packages.update({
     'qt5': Qt5Dependency,
     'sdl2': SDL2Dependency,
     'wxwidgets': WxDependency,
+    'vulkan': VulkanDependency,
 })
diff --git a/mesonbuild/dependencies/ui.py b/mesonbuild/dependencies/ui.py
index 1c59a416f..18a7996a2 100644
--- a/mesonbuild/dependencies/ui.py
+++ b/mesonbuild/dependencies/ui.py
@@ -24,7 +24,7 @@ from collections import OrderedDict
 from .. import mlog
 from .. import mesonlib
 from ..mesonlib import MesonException, Popen_safe, version_compare
-from ..environment import for_windows
+from ..environment import for_windows, detect_cpu
 
 from .base import DependencyException, DependencyMethods
 from .base import ExternalDependency, ExternalProgram
@@ -493,3 +493,56 @@ class WxDependency(ExternalDependency):
                 pass
         WxDependency.wxconfig_found = False
         mlog.log('Found wx-config:', mlog.red('NO'))
+        
+class VulkanDependency(ExternalDependency):
+    def __init__(self, environment, kwargs):
+        super().__init__('vulkan', environment, None, kwargs)
+        
+        if DependencyMethods.SYSTEM in self.methods:
+            try:
+                self.vulkan_sdk = os.environ['VULKAN_SDK']
+                if not os.path.isabs(self.vulkan_sdk):
+                    raise DependencyException('VULKAN_SDK must be an absolute path.')
+                    
+                # TODO: this config might not work on some platforms, fix bugs as reported
+                # we at least have to detect other 64-bit platforms (e.g. armv8)
+                lib_name = 'vulkan'
+                if mesonlib.is_windows():
+                    lib_name = 'vulkan-1'
+                    
+                lib_dir = 'Lib32'
+                if detect_cpu({}) == 'x86_64':
+                    lib_dir = 'Lib'
+                    
+                self.type_name = 'vulkan_sdk'
+                self.is_found = True
+                self.compile_args.append('-I' + os.path.join(self.vulkan_sdk, 'Include'))
+                self.link_args.append('-L' + os.path.join(self.vulkan_sdk, lib_dir))
+                self.link_args.append('-l' + lib_name)
+                
+                # TODO: find a way to retrieve this from the sdk
+                # we could try go guess it depending on the vulkan_sdk path
+                # usually the paths last component is the vulkan version
+                # but this might be modified at installation
+                self.version = '1' 
+                return
+            except KeyError:
+                self.vulkan_sdk = None
+            
+        if DependencyMethods.PKGCONFIG in self.methods:
+            try:
+                pcdep = PkgConfigDependency('vulkan', environment, kwargs)
+                if pcdep.found():
+                    self.type_name = 'pkgconfig'
+                    self.is_found = True
+                    self.compile_args = pcdep.get_compile_args()
+                    self.link_args = pcdep.get_link_args()
+                    self.version = pcdep.get_version()
+                    return
+            except Exception:
+                pass
+            
+    def get_methods(self):
+        return [DependencyMethods.PKGCONFIG, DependencyMethods.SYSTEM]
+
+
diff --git a/test cases/frameworks/17 vulkan/meson.build b/test cases/frameworks/17 vulkan/meson.build
new file mode 100644
index 000000000..05e6ce714
--- /dev/null
+++ b/test cases/frameworks/17 vulkan/meson.build	
@@ -0,0 +1,7 @@
+project('vulkan test', 'c')
+
+sdl2_dep = dependency('vulkan')
+
+e = executable('vulkanprog', 'vulkanprog.c', dependencies : sdl2_dep)
+
+test('vulkantest', e)
diff --git a/test cases/frameworks/17 vulkan/vulkanprog.c b/test cases/frameworks/17 vulkan/vulkanprog.c
new file mode 100644
index 000000000..86a3a204d
--- /dev/null
+++ b/test cases/frameworks/17 vulkan/vulkanprog.c	
@@ -0,0 +1,35 @@
+#include <vulkan/vulkan.h>
+#include <stdio.h>
+
+int main()
+{
+    VkApplicationInfo application_info = {
+        VK_STRUCTURE_TYPE_APPLICATION_INFO,
+        	NULL,
+        	"sway",
+        	VK_MAKE_VERSION(1,0,0),
+        	"wlroots",
+        	VK_MAKE_VERSION(1,0,0),
+        	VK_MAKE_VERSION(1,0,0)
+    };
+
+    VkInstanceCreateInfo instance_create_info = {
+        	VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO,
+        	NULL,
+        	0,
+        	&application_info,
+        	0,
+        	NULL,
+        	0,
+        	NULL,
+    };
+
+    VkInstance instance;
+    VkResult ret = vkCreateInstance(&instance_create_info, NULL, &instance);
+    if(ret != VK_SUCCESS) {
+        printf("Could not create vulkan instance: %d\n", ret);
+      	return ret;
+    }
+
+    return 0;    
+}
\ No newline at end of file