[build] allow WITH_EGL for macOS as well (SwiftShader) and enable EGL for GLFW

7 files changed, 49 insertions, 11 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 46aea73356..7098eb0137 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,7 +25,7 @@ if(WITH_OSMESA AND WITH_EGL)
 endif()
 
 if(WITH_EGL)
-    add_definitions(-DMBGL_USE_GLES2=1)
+    set(USE_GLES2 ON)
 endif()
 
 if($ENV{CI})
@@ -137,6 +137,14 @@ endif()
 
 include(platform/${MBGL_PLATFORM}/config.cmake)
 
+if(WITH_EGL)
+    add_definitions(-DMBGL_WITH_EGL=1)
+endif()
+
+if(USE_GLES2)
+    add_definitions(-DMBGL_USE_GLES2=1)
+endif()
+
 if (COMMAND mbgl_filesource)
     include(cmake/filesource.cmake)
 endif()
diff --git a/Makefile b/Makefile
index 5c521d674a..6f56c7b780 100644
--- a/Makefile
+++ b/Makefile
@@ -74,7 +74,8 @@ MACOS_XCODEBUILD = xcodebuild \
 
 $(MACOS_PROJ_PATH): $(BUILD_DEPS) $(MACOS_USER_DATA_PATH)/WorkspaceSettings.xcsettings
 	mkdir -p $(MACOS_OUTPUT_PATH)
-	(cd $(MACOS_OUTPUT_PATH) && cmake -G Xcode ../..)
+	(cd $(MACOS_OUTPUT_PATH) && cmake -G Xcode ../.. \
+		-DWITH_EGL=${WITH_EGL})
 
 $(MACOS_USER_DATA_PATH)/WorkspaceSettings.xcsettings: platform/macos/WorkspaceSettings.xcsettings
 	mkdir -p "$(MACOS_USER_DATA_PATH)"
@@ -171,6 +172,7 @@ $(MACOS_COMPDB_PATH)/Makefile:
 	mkdir -p $(MACOS_COMPDB_PATH)
 	(cd $(MACOS_COMPDB_PATH) && cmake ../../../.. \
 		-DCMAKE_BUILD_TYPE=$(BUILDTYPE) \
+		-DWITH_EGL=${WITH_EGL} \
 		-DCMAKE_EXPORT_COMPILE_COMMANDS=ON)
 
 .PHONY:
diff --git a/platform/android/config.cmake b/platform/android/config.cmake
index 77074dc82c..9ecc275406 100644
--- a/platform/android/config.cmake
+++ b/platform/android/config.cmake
@@ -1,4 +1,5 @@
-add_definitions(-DMBGL_USE_GLES2=1)
+set(USE_GLES2 ON)
+
 include(cmake/test-files.cmake)
 
 # Build thin archives.
diff --git a/platform/darwin/mbgl/gl/gl_impl.hpp b/platform/darwin/mbgl/gl/gl_impl.hpp
index b4c062a474..0db125c7b4 100644
--- a/platform/darwin/mbgl/gl/gl_impl.hpp
+++ b/platform/darwin/mbgl/gl/gl_impl.hpp
@@ -8,9 +8,15 @@
     #include <OpenGLES/ES2/gl.h>
     #include <OpenGLES/ES2/glext.h>
 #elif TARGET_OS_MAC
-    #include <OpenGL/OpenGL.h>
-    #include <OpenGL/gl.h>
-    #include <OpenGL/glext.h>
+    #if MBGL_USE_GLES2
+        #define GL_GLEXT_PROTOTYPES
+        #include <GLES2/gl2.h>
+        #include <GLES2/gl2ext.h>
+    #else
+        #include <OpenGL/OpenGL.h>
+        #include <OpenGL/gl.h>
+        #include <OpenGL/glext.h>
+    #endif
 #else
     #error Unsupported Apple platform
 #endif
diff --git a/platform/glfw/glfw_view.cpp b/platform/glfw/glfw_view.cpp
index 3988419265..068f33f8ee 100644
--- a/platform/glfw/glfw_view.cpp
+++ b/platform/glfw/glfw_view.cpp
@@ -53,13 +53,19 @@ GLFWView::GLFWView(bool fullscreen_, bool benchmark_)
         height = videoMode->height;
     }
 
+#if __APPLE__
     glfwWindowHint(GLFW_COCOA_GRAPHICS_SWITCHING, GL_TRUE);
+#endif
+
+#if MBGL_WITH_EGL
+    glfwWindowHint(GLFW_CONTEXT_CREATION_API, GLFW_EGL_CONTEXT_API);
+#endif
 
 #ifdef DEBUG
     glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE);
 #endif
 
-#ifdef GL_ES_VERSION_2_0
+#if MBGL_USE_GLES2
     glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
@@ -660,7 +666,7 @@ void GLFWView::toggle3DExtrusions(bool visible) {
 namespace mbgl {
 namespace platform {
 
-#ifndef GL_ES_VERSION_2_0
+#ifndef MBGL_USE_GLES2
 void showDebugImage(std::string name, const char *data, size_t width, size_t height) {
     glfwInit();
 
diff --git a/platform/ios/config.cmake b/platform/ios/config.cmake
index 1caf372b25..f6f12766af 100644
--- a/platform/ios/config.cmake
+++ b/platform/ios/config.cmake
@@ -1,4 +1,4 @@
-add_definitions(-DMBGL_USE_GLES2=1)
+set(USE_GLES2 ON)
 
 mason_use(icu VERSION 58.1-min-size)
 
diff --git a/platform/macos/config.cmake b/platform/macos/config.cmake
index e929bb55c6..16a9943d7b 100644
--- a/platform/macos/config.cmake
+++ b/platform/macos/config.cmake
@@ -33,7 +33,6 @@ macro(mbgl_platform_core)
         PRIVATE platform/default/mbgl/gl/headless_frontend.hpp
         PRIVATE platform/default/mbgl/gl/headless_backend.cpp
         PRIVATE platform/default/mbgl/gl/headless_backend.hpp
-        PRIVATE platform/darwin/src/headless_backend_cgl.cpp
 
         # Snapshotting
         PRIVATE platform/default/mbgl/map/map_snapshotter.cpp
@@ -46,6 +45,23 @@ macro(mbgl_platform_core)
         PRIVATE platform/default/mbgl/util/default_thread_pool.cpp
     )
 
+    if(WITH_EGL)
+        target_sources(mbgl-core
+            PRIVATE platform/linux/src/headless_backend_egl.cpp
+            PRIVATE platform/linux/src/headless_display_egl.cpp
+        )
+        mason_use(swiftshader VERSION 2017-11-20)
+        target_add_mason_package(mbgl-core PUBLIC swiftshader)
+    else()
+        target_sources(mbgl-core
+            PRIVATE platform/darwin/src/headless_backend_cgl.cpp
+            PRIVATE platform/darwin/src/headless_display_cgl.cpp
+        )
+        target_link_libraries(mbgl-core
+            PUBLIC "-framework OpenGL"
+        )
+    endif()
+
     target_add_mason_package(mbgl-core PUBLIC geojson)
     target_add_mason_package(mbgl-core PUBLIC polylabel)
     target_add_mason_package(mbgl-core PRIVATE icu)
@@ -64,7 +80,6 @@ macro(mbgl_platform_core)
         PUBLIC "-framework Foundation"
         PUBLIC "-framework CoreText"
         PUBLIC "-framework CoreGraphics"
-        PUBLIC "-framework OpenGL"
         PUBLIC "-framework ImageIO"
         PUBLIC "-framework CoreServices"
         PUBLIC "-framework SystemConfiguration"