First Angle rendering prototype.

skiko/build.gradle.kts

@@ -219,8 +219,6 @@ tasks.withType(CppCompile::class.java).configureEach {
         "-I$skiaDir/third_party/externals/harfbuzz/src",
         "-I$skiaDir/third_party/icu",
         "-I$skiaDir/third_party/externals/icu/source/common",
-        // "-lEGL",
-        // "-lGLESv2",
         "-DSK_ALLOW_STATIC_GLOBAL_INITIALIZERS=1",
         "-DSK_FORCE_DISTANCE_FIELD_TEXT=0",
         "-DSK_GAMMA_APPLY_TO_A8",

skiko/src/jvmMain/cpp/windows/AngleRedrawer.cc

@@ -9,27 +9,45 @@
 #include <EGL/eglext.h>
 #include "gl/GrGLAssembleInterface.h"
 #include "gl/GrGLDefines.h"
+#include <GL/gl.h>
 
 class AngleDevice
 {
 public:
+    HWND window;
     HDC device;
     EGLDisplay display = EGL_NO_DISPLAY;
     EGLContext context = EGL_NO_CONTEXT;
     EGLSurface surface = EGL_NO_SURFACE;
+    sk_sp<const GrGLInterface> backendContext;
     ~AngleDevice()
     {
-
+        backendContext.reset(nullptr);
+        eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+        if (EGL_NO_CONTEXT != context)
+        {
+            eglDestroyContext(display, context);
+        }
+        if (EGL_NO_SURFACE != surface)
+        {
+            eglDestroySurface(display, surface);
+        }
+        if (EGL_NO_DISPLAY != display)
+        {
+            eglTerminate(display);
+        }
     }
 };
 
 extern "C"
 {
-    EGLDisplay getAngleEGLDisplay(HDC hdc) {
+    EGLDisplay getAngleEGLDisplay(HDC hdc)
+    {
         PFNEGLGETPLATFORMDISPLAYEXTPROC eglGetPlatformDisplayEXT;
-        eglGetPlatformDisplayEXT = (PFNEGLGETPLATFORMDISPLAYEXTPROC)GetProcAddress(GetModuleHandle(NULL), "eglGetPlatformDisplayEXT");
+        eglGetPlatformDisplayEXT = (PFNEGLGETPLATFORMDISPLAYEXTPROC)eglGetProcAddress("eglGetPlatformDisplayEXT");
         // We expect ANGLE to support this extension
-        if (!eglGetPlatformDisplayEXT) {
+        if (!eglGetPlatformDisplayEXT)
+        {
             return EGL_NO_DISPLAY;
         }
         // We currently only support D3D11 ANGLE.
@@ -42,43 +60,127 @@ extern "C"
         JNIEnv *env, jobject redrawer, jlong windowHandle)
     {
         AngleDevice *angleDevice = new AngleDevice();
-        angleDevice->device = GetDC((HWND) windowHandle);
+        angleDevice->window = (HWND)windowHandle;
+        angleDevice->device = GetDC(angleDevice->window);
         angleDevice->display = getAngleEGLDisplay(angleDevice->device);
-        if (EGL_NO_DISPLAY == angleDevice->display) {
+        if (EGL_NO_DISPLAY == angleDevice->display)
+        {
+            fprintf(stderr, "Could not get display!\n");
+            return 0;
+        }
+
+        EGLint majorVersion;
+        EGLint minorVersion;
+        if (!eglInitialize(angleDevice->display, &majorVersion, &minorVersion))
+        {
+            fprintf(stderr, "Could not initialize display!\n");
             return 0;
         }
+        EGLint numConfigs;
+        const int sampleBuffers = 1;
+        const EGLint configAttribs[] = {EGL_RENDERABLE_TYPE,
+                                        // We currently only support ES3.
+                                        EGL_OPENGL_ES3_BIT,
+                                        EGL_RED_SIZE,
+                                        8,
+                                        EGL_GREEN_SIZE,
+                                        8,
+                                        EGL_BLUE_SIZE,
+                                        8,
+                                        EGL_ALPHA_SIZE,
+                                        8,
+                                        EGL_SAMPLE_BUFFERS,
+                                        sampleBuffers,
+                                        EGL_SAMPLES,
+                                        0,
+                                        EGL_NONE};
+
+        EGLConfig surfaceConfig;
+        if (!eglChooseConfig(angleDevice->display, configAttribs, &surfaceConfig, 1, &numConfigs))
+        {
+            fprintf(stderr, "Could not create choose config!\n");
+            return 0;
+        }
+        // We currently only support ES3.
+        const EGLint contextAttribs[] = {EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE};
+        angleDevice->context = eglCreateContext(angleDevice->display, surfaceConfig, nullptr, contextAttribs);
+        if (EGL_NO_CONTEXT == angleDevice->context)
+        {
+            fprintf(stderr, "Could not create context!\n");
+            return 0;
+        }
+        angleDevice->surface = eglCreateWindowSurface(angleDevice->display, surfaceConfig, angleDevice->window, nullptr);
+        if (EGL_NO_SURFACE == angleDevice->surface)
+        {
+            fprintf(stderr, "Could not create surface!\n");
+            return 0;
+        }
+        if (!eglMakeCurrent(angleDevice->display, angleDevice->surface, angleDevice->surface, angleDevice->context))
+        {
+            fprintf(stderr, "Could not make contxt current!\n");
+            return 0;
+        }
+
+        sk_sp<const GrGLInterface> interface(GrGLMakeAssembledInterface(
+            nullptr,
+            [](void *ctx, const char name[]) -> GrGLFuncPtr { return eglGetProcAddress(name); }));
+
+        angleDevice->backendContext = interface;
 
         return toJavaPointer(angleDevice);
     }
 
     JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_redrawer_AngleRedrawer_makeAngleContext(
-        JNIEnv* env, jobject redrawer, jlong devicePtr)
+        JNIEnv *env, jobject redrawer, jlong devicePtr)
     {
-        return 0;
+        AngleDevice *angleDevice = fromJavaPointer<AngleDevice *>(devicePtr);
+        sk_sp<const GrGLInterface> backendContext = angleDevice->backendContext;
+        return toJavaPointer(GrDirectContext::MakeGL(backendContext).release());
     }
 
     JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_redrawer_AngleRedrawer_makeAngleRenderTarget(
-        JNIEnv * env, jobject redrawer, jlong devicePtr, jint width, jint height)
+        JNIEnv *env, jobject redrawer, jlong devicePtr, jint width, jint height)
     {
-        return 0;
+        AngleDevice *angleDevice = fromJavaPointer<AngleDevice *>(devicePtr);
+        eglMakeCurrent(angleDevice->display, angleDevice->surface, angleDevice->surface, angleDevice->context);
+        angleDevice->backendContext->fFunctions.fViewport(0, 0, width, height);
+
+        GrGLint buffer;
+        angleDevice->backendContext->fFunctions.fGetIntegerv(GR_GL_FRAMEBUFFER_BINDING, &buffer);
+
+        GrGLFramebufferInfo info;
+        info.fFBOID = buffer;
+        info.fFormat = GR_GL_RGBA8;
+
+        GrBackendRenderTarget *renderTarget = new GrBackendRenderTarget(width,
+                                                                        height,
+                                                                        0,
+                                                                        8,
+                                                                        info);
+        return toJavaPointer(renderTarget);
     }
 
     JNIEXPORT void JNICALL Java_org_jetbrains_skiko_redrawer_AngleRedrawer_resizeBuffers(
         JNIEnv *env, jobject redrawer, jlong devicePtr, jint width, jint height)
     {
-
     }
 
     JNIEXPORT void JNICALL Java_org_jetbrains_skiko_redrawer_AngleRedrawer_finishFrame(
-        JNIEnv *env, jobject redrawer, jlong devicePtr, jlong contextPtr, jlong surfacePtr, jboolean isVsyncEnabled)
+        JNIEnv *env, jobject redrawer, jlong devicePtr, jboolean isVsyncEnabled)
     {
-
+        AngleDevice *angleDevice = fromJavaPointer<AngleDevice *>(devicePtr);
+        eglMakeCurrent(angleDevice->display, angleDevice->surface, angleDevice->surface, angleDevice->context);
+        eglSwapInterval(angleDevice->display, (int)isVsyncEnabled); // wait for vsync
+        if (!eglSwapBuffers(angleDevice->display, angleDevice->surface))
+        {
+            fprintf(stderr, "Could not complete eglSwapBuffers.\n");
+        }
     }
 
     JNIEXPORT void JNICALL Java_org_jetbrains_skiko_redrawer_AngleRedrawer_disposeDevice(
         JNIEnv *env, jobject redrawer, jlong devicePtr)
     {
-        AngleDevice *angleDevice = fromJavaPointer<AngleDevice*>(devicePtr);
+        AngleDevice *angleDevice = fromJavaPointer<AngleDevice *>(devicePtr);
         delete angleDevice;
     }
 } // end extern C

skiko/src/jvmMain/kotlin/org/jetbrains/skiko/context/AngleContextHandler.kt

@@ -25,7 +25,7 @@ internal class AngleContextHandler(layer: SkiaLayer) : ContextHandler(layer) {
                 if (device == 0L) {
                     throw Exception("Failed to create Angle device.")
                 }
-                context = angleRedrawer.makeContext(device)
+                context = angleRedrawer.makeContext()
             }
         } catch (e: Exception) {
             println("${e.message}\nFailed to create Skia Angle context!")
@@ -41,12 +41,12 @@ internal class AngleContextHandler(layer: SkiaLayer) : ContextHandler(layer) {
         val w = (layer.width * scale).toInt().coerceAtLeast(0)
         val h = (layer.height * scale).toInt().coerceAtLeast(0)
 
-        renderTarget = angleRedrawer.makeRenderTarget(device, w, h)
+        renderTarget = angleRedrawer.makeRenderTarget(w, h)
 
         surface = Surface.makeFromBackendRenderTarget(
             context!!,
             renderTarget!!,
-            SurfaceOrigin.TOP_LEFT,
+            SurfaceOrigin.BOTTOM_LEFT,
             SurfaceColorFormat.RGBA_8888,
             ColorSpace.getSRGB()
         )
@@ -56,19 +56,6 @@ internal class AngleContextHandler(layer: SkiaLayer) : ContextHandler(layer) {
 
     override fun flush() {
         super.flush()
-        try {
-            angleRedrawer.finishFrame(
-                device,
-                Native.getPtr(context!!),
-                Native.getPtr(surface!!)
-            )
-        } finally {
-            Reference.reachabilityFence(context!!)
-            Reference.reachabilityFence(surface!!)
-        }
-    }
-
-    override fun destroyContext() {
-        destroyContext(Native.getPtr(context!!))
+        angleRedrawer.finishFrame()
     }
 }

skiko/src/jvmMain/kotlin/org/jetbrains/skiko/redrawer/AngleRedrawer.kt

@@ -46,27 +46,25 @@ internal class AngleRedrawer(
         layer.draw()
     }
 
-    fun makeContext(device: Long) = DirectContext(
+    fun createDevice(): Long {
+        device = createAngleDevice(layer.windowHandle)
+        return device
+    }
+
+    fun makeContext() = DirectContext(
         makeAngleContext(device)
     )
 
-    fun makeRenderTarget(device: Long, width: Int, height: Int) = BackendRenderTarget(
+    fun makeRenderTarget(width: Int, height: Int) = BackendRenderTarget(
         makeAngleRenderTarget(device, width, height)
     )
 
-    fun createDevice(): Long {
-        device = createAngleDevice(layer.windowHandle)
-        return device
-    }
-
-    fun finishFrame(device: Long, context: Long, surface: Long) {
-        finishFrame(device, context, surface, properties.isVsyncEnabled)
-    }
+    fun finishFrame() = finishFrame(device, properties.isVsyncEnabled)
 
     external fun createAngleDevice(windowHandle: Long): Long
     external fun makeAngleContext(device: Long): Long
     external fun makeAngleRenderTarget(device: Long, width: Int, height: Int): Long
     external fun resizeBuffers(device: Long, width: Int, height: Int)
-    external fun finishFrame(device: Long, context: Long, surface: Long, isVsyncEnabled: Boolean)
+    external fun finishFrame(device: Long, isVsyncEnabled: Boolean)
     external fun disposeDevice(device: Long)
 }