| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "fl_renderer.h" |
| |
| #include "flutter/shell/platform/embedder/embedder.h" |
| #include "flutter/shell/platform/linux/egl_utils.h" |
| |
| G_DEFINE_QUARK(fl_renderer_error_quark, fl_renderer_error) |
| |
| typedef struct { |
| EGLDisplay egl_display; |
| EGLConfig egl_config; |
| EGLSurface egl_surface; |
| EGLContext egl_context; |
| |
| EGLSurface resource_surface; |
| EGLContext resource_context; |
| } FlRendererPrivate; |
| |
| G_DEFINE_TYPE_WITH_PRIVATE(FlRenderer, fl_renderer, G_TYPE_OBJECT) |
| |
| // Creates a resource surface. |
| static void create_resource_surface(FlRenderer* self, EGLConfig config) { |
| FlRendererPrivate* priv = |
| static_cast<FlRendererPrivate*>(fl_renderer_get_instance_private(self)); |
| |
| EGLint context_attributes[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE}; |
| const EGLint resource_context_attribs[] = {EGL_WIDTH, 1, EGL_HEIGHT, 1, |
| EGL_NONE}; |
| priv->resource_surface = eglCreatePbufferSurface(priv->egl_display, config, |
| resource_context_attribs); |
| if (priv->resource_surface == EGL_NO_SURFACE) { |
| g_warning("Failed to create EGL resource surface: %s", |
| egl_error_to_string(eglGetError())); |
| return; |
| } |
| |
| priv->resource_context = eglCreateContext( |
| priv->egl_display, config, priv->egl_context, context_attributes); |
| if (priv->resource_context == EGL_NO_CONTEXT) |
| g_warning("Failed to create EGL resource context: %s", |
| egl_error_to_string(eglGetError())); |
| } |
| |
| static void fl_renderer_class_init(FlRendererClass* klass) {} |
| |
| static void fl_renderer_init(FlRenderer* self) {} |
| |
| gboolean fl_renderer_setup(FlRenderer* self, GError** error) { |
| FlRendererPrivate* priv = |
| static_cast<FlRendererPrivate*>(fl_renderer_get_instance_private(self)); |
| |
| // Note the use of EGL_DEFAULT_DISPLAY rather than sharing an existing |
| // display connection (e.g. an X11 connection from GTK). This is because |
| // this EGL display is going to be accessed by a thread from Flutter. In the |
| // case of GTK/X11 the display connection is not thread safe and this would |
| // cause a crash. |
| priv->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY); |
| |
| if (!eglInitialize(priv->egl_display, nullptr, nullptr)) { |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to initialze EGL"); |
| return FALSE; |
| } |
| |
| EGLint attributes[] = {EGL_RENDERABLE_TYPE, |
| EGL_OPENGL_ES2_BIT, |
| EGL_RED_SIZE, |
| 8, |
| EGL_GREEN_SIZE, |
| 8, |
| EGL_BLUE_SIZE, |
| 8, |
| EGL_ALPHA_SIZE, |
| 8, |
| EGL_NONE}; |
| EGLint n_config; |
| if (!eglChooseConfig(priv->egl_display, attributes, &priv->egl_config, 1, |
| &n_config)) { |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to choose EGL config: %s", |
| egl_error_to_string(eglGetError())); |
| return FALSE; |
| } |
| |
| if (n_config == 0) { |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to find appropriate EGL config: %s", |
| egl_error_to_string(eglGetError())); |
| return FALSE; |
| } |
| |
| if (!eglBindAPI(EGL_OPENGL_ES_API)) { |
| g_autofree gchar* config_string = |
| egl_config_to_string(priv->egl_display, priv->egl_config); |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to bind EGL OpenGL ES API using configuration (%s): %s", |
| config_string, egl_error_to_string(eglGetError())); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| GdkVisual* fl_renderer_get_visual(FlRenderer* self, |
| GdkScreen* screen, |
| GError** error) { |
| FlRendererPrivate* priv = |
| static_cast<FlRendererPrivate*>(fl_renderer_get_instance_private(self)); |
| |
| EGLint visual_id; |
| if (!eglGetConfigAttrib(priv->egl_display, priv->egl_config, |
| EGL_NATIVE_VISUAL_ID, &visual_id)) { |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to determine EGL configuration visual"); |
| return nullptr; |
| } |
| |
| GdkVisual* visual = |
| FL_RENDERER_GET_CLASS(self)->get_visual(self, screen, visual_id); |
| if (visual == nullptr) { |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to find visual 0x%x", visual_id); |
| return nullptr; |
| } |
| |
| return visual; |
| } |
| |
| gboolean fl_renderer_start(FlRenderer* self, GError** error) { |
| FlRendererPrivate* priv = |
| static_cast<FlRendererPrivate*>(fl_renderer_get_instance_private(self)); |
| |
| priv->egl_surface = FL_RENDERER_GET_CLASS(self)->create_surface( |
| self, priv->egl_display, priv->egl_config); |
| if (priv->egl_surface == EGL_NO_SURFACE) { |
| g_autofree gchar* config_string = |
| egl_config_to_string(priv->egl_display, priv->egl_config); |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to create EGL surface using configuration (%s): %s", |
| config_string, egl_error_to_string(eglGetError())); |
| return FALSE; |
| } |
| |
| EGLint context_attributes[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE}; |
| priv->egl_context = eglCreateContext(priv->egl_display, priv->egl_config, |
| EGL_NO_CONTEXT, context_attributes); |
| if (priv->egl_context == EGL_NO_CONTEXT) { |
| g_autofree gchar* config_string = |
| egl_config_to_string(priv->egl_display, priv->egl_config); |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to create EGL context using configuration (%s): %s", |
| config_string, egl_error_to_string(eglGetError())); |
| return FALSE; |
| } |
| |
| create_resource_surface(self, priv->egl_config); |
| |
| return TRUE; |
| } |
| |
| void* fl_renderer_get_proc_address(FlRenderer* self, const char* name) { |
| return reinterpret_cast<void*>(eglGetProcAddress(name)); |
| } |
| |
| gboolean fl_renderer_make_current(FlRenderer* self, GError** error) { |
| FlRendererPrivate* priv = |
| static_cast<FlRendererPrivate*>(fl_renderer_get_instance_private(self)); |
| |
| if (!eglMakeCurrent(priv->egl_display, priv->egl_surface, priv->egl_surface, |
| priv->egl_context)) { |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to make EGL context current: %s", |
| egl_error_to_string(eglGetError())); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| gboolean fl_renderer_make_resource_current(FlRenderer* self, GError** error) { |
| FlRendererPrivate* priv = |
| static_cast<FlRendererPrivate*>(fl_renderer_get_instance_private(self)); |
| |
| if (priv->resource_surface == EGL_NO_SURFACE || |
| priv->resource_context == EGL_NO_CONTEXT) |
| return FALSE; |
| |
| if (!eglMakeCurrent(priv->egl_display, priv->resource_surface, |
| priv->resource_surface, priv->resource_context)) { |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to make EGL context current: %s", |
| egl_error_to_string(eglGetError())); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| gboolean fl_renderer_clear_current(FlRenderer* self, GError** error) { |
| FlRendererPrivate* priv = |
| static_cast<FlRendererPrivate*>(fl_renderer_get_instance_private(self)); |
| |
| if (!eglMakeCurrent(priv->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, |
| EGL_NO_CONTEXT)) { |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to clear EGL context: %s", |
| egl_error_to_string(eglGetError())); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| guint32 fl_renderer_get_fbo(FlRenderer* self) { |
| // There is only one frame buffer object - always return that. |
| return 0; |
| } |
| |
| gboolean fl_renderer_present(FlRenderer* self, GError** error) { |
| FlRendererPrivate* priv = |
| static_cast<FlRendererPrivate*>(fl_renderer_get_instance_private(self)); |
| |
| if (!eglSwapBuffers(priv->egl_display, priv->egl_surface)) { |
| g_set_error(error, fl_renderer_error_quark(), FL_RENDERER_ERROR_FAILED, |
| "Failed to swap EGL buffers: %s", |
| egl_error_to_string(eglGetError())); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
