1 /*
2 * Copyright (c) 2019 Arm Limited.
3 *
4 * SPDX-License-Identifier: MIT
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25 #include "arm_compute/runtime/GLES_COMPUTE/GCHelpers.h"
26
27 #include "arm_compute/core/Error.h"
28
29 namespace arm_compute
30 {
create_opengl_display_and_context()31 std::tuple<EGLDisplay, EGLContext, EGLBoolean> create_opengl_display_and_context()
32 {
33 EGLBoolean res;
34 EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
35
36 ARM_COMPUTE_ERROR_ON_MSG_VAR(display == EGL_NO_DISPLAY, "Failed to get display: 0x%x.", eglGetError());
37
38 res = eglInitialize(display, nullptr, nullptr);
39
40 ARM_COMPUTE_ERROR_ON_MSG_VAR(res == EGL_FALSE, "Failed to initialize egl: 0x%x.", eglGetError());
41 ARM_COMPUTE_UNUSED(res);
42
43 const char *egl_extension_st = eglQueryString(display, EGL_EXTENSIONS);
44 ARM_COMPUTE_ERROR_ON_MSG((strstr(egl_extension_st, "EGL_KHR_create_context") == nullptr), "Failed to query EGL_KHR_create_context");
45 ARM_COMPUTE_ERROR_ON_MSG((strstr(egl_extension_st, "EGL_KHR_surfaceless_context") == nullptr), "Failed to query EGL_KHR_surfaceless_context");
46 ARM_COMPUTE_UNUSED(egl_extension_st);
47
48 const std::array<EGLint, 3> config_attribs =
49 {
50 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT_KHR,
51 EGL_NONE
52 };
53 EGLConfig cfg;
54 EGLint count;
55
56 res = eglChooseConfig(display, config_attribs.data(), &cfg, 1, &count);
57
58 ARM_COMPUTE_ERROR_ON_MSG_VAR(res == EGL_FALSE, "Failed to choose config: 0x%x.", eglGetError());
59 ARM_COMPUTE_UNUSED(res);
60
61 res = eglBindAPI(EGL_OPENGL_ES_API);
62
63 ARM_COMPUTE_ERROR_ON_MSG_VAR(res == EGL_FALSE, "Failed to bind api: 0x%x.", eglGetError());
64
65 const std::array<EGLint, 3> attribs =
66 {
67 EGL_CONTEXT_CLIENT_VERSION, 3,
68 EGL_NONE
69 };
70 EGLContext context = eglCreateContext(display,
71 cfg,
72 EGL_NO_CONTEXT,
73 attribs.data());
74
75 ARM_COMPUTE_ERROR_ON_MSG_VAR(context == EGL_NO_CONTEXT, "Failed to create context: 0x%x.", eglGetError());
76 ARM_COMPUTE_UNUSED(res);
77
78 res = eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, context);
79
80 ARM_COMPUTE_ERROR_ON_MSG_VAR(res == EGL_FALSE, "Failed to make current: 0x%x.", eglGetError());
81 ARM_COMPUTE_UNUSED(res);
82
83 return std::make_tuple(display, context, res);
84 }
85 } // namespace arm_compute
86