Running ImGui app on Arm Processor (Allwinner H3 with mali 400 -> orangepi one)

Version/Branch of Dear ImGui:

Version 1.90.5, Branch: master

Back-ends:

imgui_impl_glfw + imgui_impl_opengl3

Compiler, OS:

Linux (on armv7)

Full config/build information:

No response

Details:

Hi dear ImGui. Im trying to run C++ ImGui app on arm cpu AllWinenr H3 with mali 400 GPU. It compiles but when I run it screen flashes black once then it gives me this error:

Glfw Error 65544: X11: RandR gamma ramp support seems broken MESA-LOADER: failed to retrieve device information libGL error: unable to load driver: mali_drm_dri.so libGL error: driver pointer missing libGL error: failed to load driver: mali_drm Failed to initialize OpenGL loader!

I have tried:

put "#define IMGUI_IMPL_OPENGL_ES2" inside imconfig.h file
use "#version 100" during init.

I got this when I ran "glxinfo"

OpenGL vendor string: VMware, Inc. OpenGL renderer string: llvmpipe (LLVM 6.0, 128 bits) OpenGL core profile version string: 3.3 (Core Profile) Mesa 18.0.5 OpenGL core profile shading language version string: 3.30 OpenGL core profile context flags: (none) OpenGL core profile profile mask: core profile OpenGL core profile extensions: OpenGL version string: 3.0 Mesa 18.0.5 OpenGL shading language version string: 1.30 OpenGL context flags: (none) OpenGL extensions: OpenGL ES profile version string: OpenGL ES 3.0 Mesa 18.0.5 OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00 OpenGL ES profile extensions:

and when I run "glxgears" or "glmark2-es2" it works fine and displays 3D objects.

How can I fix it?

Screenshots/Video:

No response

Minimal, Complete and Verifiable Example code:

#include <cstdio>
#include <GL/glew.h>
#include "imgui.h"
#include "backends/imgui_impl_glfw.h"
#include "backends/imgui_impl_opengl3.h"
#include <GLFW/glfw3.h> // Include glfw3.h after our OpenGL definitions

static void glfw_error_callback(int error, const char* description) {
    fprintf(stderr, "Glfw Error %d: %s\n", error, description);
}

int main(int, char**) {
    glfwSetErrorCallback(glfw_error_callback);
    if (!glfwInit())
        return 1;

    // Decide GL+GLSL versions
    const char* glsl_version = "#version 100";
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);

    // Create window with graphics context
    GLFWwindow* window = glfwCreateWindow(200, 200, "Dear ImGui GLFW+OpenGL3 example", glfwGetPrimaryMonitor(), NULL);
    if (window == NULL)
        return 1;
    glfwMakeContextCurrent(window);
    glfwSwapInterval(1); // Enable vsync

    if (glewInit() != GLEW_OK) {
        fprintf(stderr, "Failed to initialize OpenGL loader!\n");
        return 1;
    }

    // Setup Dear ImGui context
    IMGUI_CHECKVERSION();
    ImGui::CreateContext();
    ImGuiIO& io = ImGui::GetIO(); (void)io;

    // Setup Platform/Renderer bindings
    ImGui_ImplGlfw_InitForOpenGL(window, true);
    ImGui_ImplOpenGL3_Init(glsl_version);

    // Main loop
    while (!glfwWindowShouldClose(window)) {
        glfwPollEvents();
        ImGui_ImplOpenGL3_NewFrame();
        ImGui_ImplGlfw_NewFrame();
        ImGui::NewFrame();

        // Here you can build your ImGui interfaces
        ImGui::Begin("Hello, world!");
        ImGui::Text("This is some useful text.");
        ImGui::End();

        // Rendering
        ImGui::Render();
        int display_w, display_h;
        glfwGetFramebufferSize(window, &display_w, &display_h);
        glViewport(0, 0, display_w, display_h);
        glClearColor(0.45f, 0.55f, 0.60f, 1.00f);
        glClear(GL_COLOR_BUFFER_BIT);
        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());

        glfwSwapBuffers(window);
    }

    // Cleanup
    ImGui_ImplOpenGL3_Shutdown();
    ImGui_ImplGlfw_Shutdown();
    ImGui::DestroyContext();

    glfwDestroyWindow(window);
    glfwTerminate();

    return 0;
}

ocornut / imgui