The next thing to do is to set the GLView mode. Glapi->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) Second, you can get the Evas_GL instance from elm_glview_gl_api_get function, then you can call the OpenGL ES functions with the instance.Įvas_GL_API *glapi = elm_glview_gl_api_get(ad->glview) GlClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) Static void create_gl_canvas(appdata_s *ad)ĮLEMENTARY_GLVIEW_GLOBAL_USE(ad->glview)

Before calling gl functions, write ELEMENTARY_GLVIEW_GLOBAL_USE(). You have to include Elementary_GL_Helpers.h and define a global variable by using ELEMENTARY_GLVIEW_GLOBAL_DEFINE().

First is to use Elementary GL Helper functions.

There are 2 different methods to call GL functions. To develop a GL application, you have to call elm_config_accel_preference_set() before creating a window which makes an application to use GPU.Īd->glview = elm_glview_add(ad->main_box) When developing an application with Elementary, you can create a window by using the Elementary utility function as below:Įlm_config_accel_preference_set('opengl') Īd->win = elm_win_util_standard_add('GLView Example', 'GLView Example')

Evas_Object *inner_box: Box object for toolbox.

Evas_Object *main_box: Box object which contains glview and inner_box.

Evas_Object *conform: Conformant object for indicator.

Building the Environmentĭefine the application data structure that holds all the objects pertinent for the GLView application: This provides a basic UI application skeleton which already makes available the window object that contains the GLView canvas. Several concepts are explained, such as the cube geometry, the initialization phase of the model, the adjustment of this very model frame by frame, and the way to design the OpenGL ES rendering loop.įirst create a basic application as explained in the Basic application tutorial. This tutorial demonstrates how you can create a multicolored 3D rotating cube using OpenGL ES 2.0 API provided by GLView library. Use client-side rotation when the application is using Direct Rendering. View the entire source code of the cube example.Ĭheck whether an extension is available, and call it.Ĭheck whether an Evas extension is available, and use it.Įnhance performance through the Direct Rendering option. Warm-upīecome familiar with the OpenGL ES API basics by learning about:Ĭreate a basic application with a multicolored 3D rotating cube using OpenGL ES 2.0 API provided by the GLView library.Ĭreate UI components that interact with the rendering. This tutorial demonstrates how you can handle OpenGL ES graphics with the GLView component and EvasGL.

Opengl es 2.0 draw framebuffer