ANGLE load properly but does not work

Claud

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Jul 13, 2023, 11:02:16 PM7/13/23

to angleproject

Applying ANGLE is explained as if it were very simple,

but it doesn't seem to be as easy as I thought.
Whether it's because of the lack of relevant data or just the name,

it's not easy to find reference, so I'm asking here.
(If I search for ANGLE, it's all about rotation or degrees. lol)

I'm working on connecting ANGLE to a C# app on Windows.
At the end of twists and turns, ANGLE seems to load properly, but it doesn't work.

The only code on the C# side is hWnd = CreateWindowEx( ... ).
Below is the CPP code.

void angleTest(HWND hWnd) {
EGLint error;
EGLint major;
EGLint minor;
GLenum err;

EGLNativeDisplayType hDC = (EGLNativeDisplayType) GetDC(hWnd);

EGLint dispAttr[] = {
EGL_PLATFORM_ANGLE_TYPE_ANGLE, EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE,
EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE, EGL_PLATFORM_ANGLE_DEVICE_TYPE_HARDWARE_ANGLE,
EGL_NONE
};

EGLDisplay display = eglGetPlatformDisplayEXT(EGL_PLATFORM_ANGLE_ANGLE, hDC, dispAttr);
error = eglGetError(); // EGL_SUCCESS

eglInitialize(display, &major, &minor); // major = 1, minor = 5
error = eglGetError(); // EGL_SUCCESS

hinstEgl = LoadLibrary(L"libEGL.dll");
gladLoadEGLLoader((GLADloadproc) GetProcAddressWithFallback);

EGLint configAttr[] = {
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_DEPTH_SIZE, EGL_DONT_CARE,
EGL_STENCIL_SIZE, EGL_DONT_CARE,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_NONE
};

EGLConfig configs;
EGLint numConfig = 0;
eglChooseConfig(display, configAttr, &configs, 1, &numConfig); // numConfig = 1
error = eglGetError(); // EGL_SUCCESS

eglBindAPI(EGL_OPENGL_ES_API);
error = eglGetError(); // EGL_SUCCESS

EGLint contextAttr[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_CONTEXT_MAJOR_VERSION, 2,
EGL_CONTEXT_MINOR_VERSION, 0,
EGL_CONTEXT_OPENGL_BACKWARDS_COMPATIBLE_ANGLE, EGL_FALSE,
EGL_NONE
};

EGLContext context = eglCreateContext(display, configs, EGL_NO_CONTEXT, contextAttr);
error = eglGetError(); // EGL_SUCCESS

EGLint surfaceAttr[] = {
EGL_RENDER_BUFFER, EGL_BACK_BUFFER,
EGL_NONE
};

EGLSurface surface = eglCreateWindowSurface(display, configs, hWnd, surfaceAttr);
error = eglGetError(); // EGL_SUCCESS

eglMakeCurrent(display, surface, surface, context);
error = eglGetError(); // EGL_SUCCESS

hinstGles = LoadLibrary(L"libGLESv2.dll");
gladLoadGLES2Loader((GLADloadproc) GetProcAddressWithFallback);

const GLubyte* ven = glGetString(GL_VENDOR); // Google Inc. (NVIDIA)
const GLubyte* ren = glGetString(GL_RENDERER); // ANGLE (NVIDIA, NVIDIA GeForce GTX 1050 Direct3D11 vs_5_0 ps_5_0, D3D11-31.0.15.3640)
const GLubyte* ver = glGetString(GL_VERSION); // OpenGL ES 2.0.0 (ANGLE 2.1.21199 git hash: b0e9bbd79fb6)

glViewport(0, 0, 400, 400);
err = glGetError(); // 0

glClearColor(1.f, 0.f, 0.f, 1.f);
err = glGetError(); // 0

glClear(GL_COLOR_BUFFER_BIT);
err = glGetError(); // 0

// glFlush();
// err = glGetError(); // 0

eglSwapBuffers(display, surface); // EGL_SUCCESS
}

But no color changes...

It's originally a separate code, but it's running in the same thread anyway.

If I change the settings related to ANGLE,

there is a difference between the screen coming out in blue or gray,

so it doesn't seem to be working completely separately.
(If it comes out in blue, if I move the window or change the window size,

it will be erased in gray.)

Any kind of help would be appreciated.

ps. Sorry, I'm not good at English.

Claud

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Jul 13, 2023, 11:07:21 PM7/13/23

to angleproject

There is a part where I made a mistake while uploading the code.

hinstEgl = LoadLibrary(L"libEGL.dll");
gladLoadEGLLoader((GLADloadproc) GetProcAddressWithFallback);

This code is at the top.
I can't edit the post.

2023년 7월 14일 금요일 오후 3시 2분 16초 UTC+9에 Claud님이 작성:

Claud

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Jul 13, 2023, 11:38:05 PM7/13/23

to angleproject

Wow... writing here solves it right away.
At least the code I've uploaded here is rendering normally.
Now I need to find out why it's not working in my code. lol

2023년 7월 14일 금요일 오후 3시 7분 21초 UTC+9에 Claud님이 작성:

Shahbaz Youssefi

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Jul 14, 2023, 6:19:15 AM7/14/23

to angleproject

Glad we could help you, lol :D

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