Aggiungi implementazione di EGL per la gestione del contesto OpenGL

2024-12-27 22:23:05 +01:00
parent 98a9e5fb8b
commit 69940890ec
1 changed files with 77 additions and 0 deletions
@@ -0,0 +1,77 @@
+from pyglet.libs.egl import egl as libegl
+from pyglet.libs.egl.egl import *
+
+
+_buffer_types = {EGL_SINGLE_BUFFER: "EGL_RENDER_BUFFER",
+                 EGL_BACK_BUFFER: "EGL_BACK_BUFFER",
+                 EGL_NONE: "EGL_NONE"}
+
+_api_types = {EGL_OPENGL_API: "EGL_OPENGL_API",
+              EGL_OPENGL_ES_API: "EGL_OPENGL_ES_API",
+              EGL_NONE: "EGL_NONE"}
+
+# Initialize a display:
+display = libegl.EGLNativeDisplayType()
+display_connection = libegl.eglGetDisplay(display)
+
+majorver = libegl.EGLint()
+minorver = libegl.EGLint()
+result = libegl.eglInitialize(display_connection, majorver, minorver)
+assert result == 1, "EGL Initialization Failed"
+egl_version = majorver.value, minorver.value
+print(f"EGL version: {egl_version}")
+
+# Get the number of configs:
+num_configs = libegl.EGLint()
+config_size = libegl.EGLint()
+result = libegl.eglGetConfigs(display_connection, None, config_size, num_configs)
+assert result == 1, "Failed to query Configs"
+
+print("Number of configs available: ", num_configs.value)
+
+# Choose a config:
+config_attribs = (EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
+                  EGL_BLUE_SIZE, 8,
+                  EGL_GREEN_SIZE, 8,
+                  EGL_RED_SIZE, 8,
+                  EGL_DEPTH_SIZE, 8,
+                  EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
+                  EGL_NONE)
+config_attrib_array = (libegl.EGLint * len(config_attribs))(*config_attribs)
+egl_config = libegl.EGLConfig()
+result = libegl.eglChooseConfig(display_connection, config_attrib_array, egl_config, 1, num_configs)
+assert result == 1, "Failed to choose Config"
+
+# Create a surface:
+pbufferwidth = 1
+pbufferheight = 1
+pbuffer_attribs = (EGL_WIDTH, pbufferwidth, EGL_HEIGHT, pbufferheight, EGL_NONE)
+pbuffer_attrib_array = (libegl.EGLint * len(pbuffer_attribs))(*pbuffer_attribs)
+surface = libegl.eglCreatePbufferSurface(display_connection, egl_config, pbuffer_attrib_array)
+print("Surface: ", surface)
+
+# Bind the API:
+result = libegl.eglBindAPI(libegl.EGL_OPENGL_API)
+assert result == 1, "Failed to bind EGL_OPENGL_API"
+
+# Create a context:
+context_attribs = (EGL_CONTEXT_MAJOR_VERSION, 2, EGL_NONE)
+context_attrib_array = (libegl.EGLint * len(context_attribs))(*context_attribs)
+context = libegl.eglCreateContext(display_connection, egl_config, None, context_attrib_array)
+print("Context: ", context)
+
+# Make context current:
+result = libegl.eglMakeCurrent(display_connection, surface, surface, context)
+assert result == 1, "Failed to make context current"
+
+error_code = libegl.eglGetError()
+assert error_code == EGL_SUCCESS, "EGL Error code {} returned".format(error_code)
+
+# Print some context details:
+buffer_type = libegl.EGLint()
+libegl.eglQueryContext(display_connection, context, EGL_RENDER_BUFFER, buffer_type)
+print("Buffer type: ", _buffer_types.get(buffer_type.value, "Unknown"))
+print("API type: ", _api_types.get(libegl.eglQueryAPI(), "Unknown"))
+
+# Terminate EGL:
+libegl.eglTerminate(display_connection)