From 1761211ba10580fc095987290fe651f16abc887f Mon Sep 17 00:00:00 2001
From: Vitaliy Zarubin <v.zarubin@omp.ru>
Date: Thu, 19 Oct 2023 09:37:01 +0300
Subject: [PATCH] [example] Update linux texture

---
 .../embedder_texture/linux/CMakeLists.txt     |  9 +--
 .../linux/embedder_texture_plugin.cc          | 65 ++++++-------------
 2 files changed, 21 insertions(+), 53 deletions(-)

diff --git a/packages/embedder_texture/linux/CMakeLists.txt b/packages/embedder_texture/linux/CMakeLists.txt
index 980b84a..433c4b0 100644
--- a/packages/embedder_texture/linux/CMakeLists.txt
+++ b/packages/embedder_texture/linux/CMakeLists.txt
@@ -21,11 +21,4 @@ target_compile_definitions(${PLUGIN_NAME} PRIVATE FLUTTER_PLUGIN_IMPL)
 
 target_include_directories(${PLUGIN_NAME} INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/include")
 target_link_libraries(${PLUGIN_NAME} PRIVATE flutter)
-target_link_libraries(${PLUGIN_NAME} PRIVATE PkgConfig::GTK)
-
-# sudo apt-get install libglew-dev
-target_link_libraries(${PLUGIN_NAME} PUBLIC
-  EGL
-  GLEW
-  GL
-)
+target_link_libraries(${PLUGIN_NAME} PUBLIC GL)
diff --git a/packages/embedder_texture/linux/embedder_texture_plugin.cc b/packages/embedder_texture/linux/embedder_texture_plugin.cc
index fc79fcf..f130565 100644
--- a/packages/embedder_texture/linux/embedder_texture_plugin.cc
+++ b/packages/embedder_texture/linux/embedder_texture_plugin.cc
@@ -3,15 +3,7 @@
 
 #include <flutter_linux/flutter_linux.h>
 #include <flutter_linux/fl_view.h>
-#include <gtk/gtk.h>
-#include <gdk/gdkx.h>
-#include <sys/utsname.h>
-#include <glib.h>
-#include <GL/glew.h>
-
-#include <thread>
-#include <chrono>
-#include <vector>
+#include <GLES2/gl2.h>
 
 #include "embedder_texture_plugin_private.h"
 
@@ -30,8 +22,6 @@ struct _LinuxOpenglPlugin
   FlTexture *texture = nullptr;
   FlTextureRegistrar *texture_registrar = nullptr;
 
-  GdkGLContext *context = nullptr;
-  GdkWindow *window = nullptr;
   FlMyTextureGL *myTexture = nullptr;
   FlView *fl_view = nullptr;
 };
@@ -64,23 +54,6 @@ static void embedder_texture_plugin_handle_method_call(
   fl_method_call_respond(method_call, response, nullptr);
 }
 
-void set_color(LinuxOpenglPlugin *self)
-{
-    gdk_gl_context_make_current(self->context);
-
-    static GLfloat pixels[] =
-        {
-            1, 0, 0,
-            0, 1, 0,
-            0, 0, 1,
-            1, 1, 1
-        };
-
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0, GL_RGB, GL_FLOAT, pixels);
-
-    fl_texture_registrar_mark_texture_frame_available(self->texture_registrar, self->texture);
-}
-
 FlMethodResponse *create(
     LinuxOpenglPlugin *self,
     FlMethodCall *method_call)
@@ -102,23 +75,33 @@ FlMethodResponse *create(
 
     if (self->width != 0 && self->height != 0)
     {
-        self->window = gtk_widget_get_parent_window(GTK_WIDGET(self->fl_view));
-        self->context = gdk_window_create_gl_context(self->window, &error);
-
-        gdk_gl_context_make_current(self->context);
-
+        static GLfloat pixels[] =
+            {
+                1, 0, 0,
+                0, 1, 0,
+                0, 0, 1,
+                1, 1, 1
+            };
+
+        // create in open gl
         glGenTextures(1, &self->texture_id);
         glBindTexture(GL_TEXTURE_2D, self->texture_id);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
-        // drawing on the texture
-        set_color(self);
-
+        // create
         self->myTexture = fl_my_texture_gl_new(GL_TEXTURE_2D, self->texture_id, self->width, self->height);
         self->texture = FL_TEXTURE(self->myTexture);
 
+        // reg
         fl_texture_registrar_register_texture(self->texture_registrar, self->texture);
-        gdk_gl_context_clear_current();
 
+        // draw
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0, GL_RGB, GL_FLOAT, pixels);
+
+        // send id
         g_autoptr(FlValue) result = fl_value_new_int(reinterpret_cast<int64_t>(self->texture));
         return FL_METHOD_RESPONSE(fl_method_success_response_new(result));
     }
@@ -186,13 +169,5 @@ void embedder_texture_plugin_register_with_registrar(FlPluginRegistrar *registra
                                             g_object_ref(plugin),
                                             g_object_unref);
 
-  GLenum err = glewInit();
-  if (GLEW_OK != err)
-  {
-    printf("%s", "Error!");
-    printf("%s", glewGetErrorString(err));
-    return;
-  }
-
   g_object_unref(plugin);
 }