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Backends, Examples: QNX: amends. Moved ignore list to main file. Removed .use files. (#9492)

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Moved functions in example_qnx_opengl3/main.cpp to match structure of other examples.
This commit is contained in:
ocornut
2026-08-04 14:11:12 +02:00
parent 40ec568762
commit 7c9f0c148c
8 changed files with 147 additions and 188 deletions
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7
.gitignore vendored
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@@ -9,6 +9,8 @@ imgui*.ini
## General build artifacts
*.o
*.so*
*.a
*.obj
*.exe
examples/*/Debug/*
@@ -57,6 +59,11 @@ examples/example_sdl3_wgpu/web/*
.idea
cmake-build-*
## QNX artifacts
*.pinfo
*.dep
*.gcno
## Unix executables from our example Makefiles
examples/example_apple_metal/example_apple_metal
examples/example_apple_opengl2/example_apple_opengl2

6
backends/imgui_impl_qnx.cpp
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@@ -14,11 +14,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2026-07-30: Renamed backend from imgui_impl_screen to imgui_impl_qnx and embedded a compact keysym table.
// 2026-07-29: Reworked keyboard handling from the proven qterm Screen path: authoritative modifier masks,
// complete keypad/Hyper mapping, and QNX/X11 keysym-to-Unicode conversion.
// 2026-07-29: Fixed keyboard handling: use KEY_CAP for physical keys, SYM for text, and honor Screen validity flags.
// 2026-07-28: Initial QNX Screen backend.
// 2026-08-04: Initial QNX Screen backend. (#9492)
#include "imgui.h"
#ifndef IMGUI_DISABLE

1
backends/imgui_impl_qnx.h
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@@ -10,7 +10,6 @@
// [ ] Platform: Clipboard support.
// [ ] Platform: Gamepad support.
// [ ] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors).
// [ ] Platform: Multi-viewport support.
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.

19
examples/example_qnx_opengl3/.gitignore vendored
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@@ -1,19 +0,0 @@
# ignore all files
*
# unignore all dirs
!/**/
# unignore all with extensions
!*.*
# unignore makefiles
!Makefile
# re-ignore qnx build artefacts
*.o
*.so*
*.a
*.pinfo
*.dep
*.gcno

6
examples/example_qnx_opengl3/example_qnx_opengl3.use
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@@ -1,6 +0,0 @@
Dear ImGui QNX Screen + OpenGL ES 3 example
Usage: example_qnx_opengl3
The example uses the fullscreen size reported by QNX Screen, displays the Dear ImGui demo UI,
and exits when Escape is pressed or the Screen window receives a close event.

270
examples/example_qnx_opengl3/main.cpp
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@@ -36,137 +36,10 @@ struct QNXWindow
int Size[2] = {};
};
static bool CreateQNXWindow(QNXWindow* window)
{
if (screen_create_context(&window->Context, 0) != 0 ||
screen_create_window(&window->Window, window->Context) != 0 ||
screen_create_event(&window->Event) != 0)
{
fprintf(stderr, "QNX Screen initialization failed: %s\n", strerror(errno));
return false;
}
// A newly created QNX Screen window reports the fullscreen dimensions.
if (screen_get_window_property_iv(window->Window, SCREEN_PROPERTY_SIZE, window->Size) != 0 || window->Size[0] <= 0 || window->Size[1] <= 0)
{
fprintf(stderr, "Failed to obtain QNX Screen window size: %s\n", strerror(errno));
return false;
}
const int usage = SCREEN_USAGE_OPENGL_ES2 | SCREEN_USAGE_OPENGL_ES3 | SCREEN_USAGE_NATIVE;
const int transparency = SCREEN_TRANSPARENCY_NONE;
const int swap_interval = 1;
if (screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_USAGE, &usage) != 0 ||
screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_SIZE, window->Size) != 0 ||
screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_TRANSPARENCY, &transparency) != 0 ||
screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_SWAP_INTERVAL, &swap_interval) != 0)
{
fprintf(stderr, "Failed to configure QNX Screen window: %s\n", strerror(errno));
return false;
}
window->Display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (window->Display == EGL_NO_DISPLAY || eglInitialize(window->Display, nullptr, nullptr) != EGL_TRUE || eglBindAPI(EGL_OPENGL_ES_API) != EGL_TRUE)
{
fprintf(stderr, "EGL initialization failed: 0x%04x\n", eglGetError());
return false;
}
const EGLint config_attributes[] =
{
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_DEPTH_SIZE, 24,
EGL_STENCIL_SIZE, 8,
EGL_NONE
};
EGLConfig config = nullptr;
EGLint config_count = 0;
if (eglChooseConfig(window->Display, config_attributes, &config, 1, &config_count) != EGL_TRUE || config_count == 0)
{
fprintf(stderr, "eglChooseConfig() failed: 0x%04x\n", eglGetError());
return false;
}
EGLint native_visual = 0;
if (eglGetConfigAttrib(window->Display, config, EGL_NATIVE_VISUAL_ID, &native_visual) != EGL_TRUE ||
screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_FORMAT, &native_visual) != 0 ||
screen_create_window_buffers(window->Window, 2) != 0)
{
fprintf(stderr, "Failed to create QNX Screen buffers: %s\n", strerror(errno));
return false;
}
const EGLint context_attributes[] = { EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE };
window->GLContext = eglCreateContext(window->Display, config, EGL_NO_CONTEXT, context_attributes);
window->GLSurface = eglCreateWindowSurface(window->Display, config, window->Window, nullptr);
if (window->GLContext == EGL_NO_CONTEXT || window->GLSurface == EGL_NO_SURFACE ||
eglMakeCurrent(window->Display, window->GLSurface, window->GLSurface, window->GLContext) != EGL_TRUE ||
eglSwapInterval(window->Display, 1) != EGL_TRUE)
{
fprintf(stderr, "EGL context creation failed: 0x%04x\n", eglGetError());
return false;
}
const int visible = 1;
if (screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_VISIBLE, &visible) != 0)
{
fprintf(stderr, "Failed to show QNX Screen window: %s\n", strerror(errno));
return false;
}
return true;
}
static void DestroyQNXWindow(QNXWindow* window)
{
if (window->Display != EGL_NO_DISPLAY)
{
eglMakeCurrent(window->Display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (window->GLSurface != EGL_NO_SURFACE)
eglDestroySurface(window->Display, window->GLSurface);
if (window->GLContext != EGL_NO_CONTEXT)
eglDestroyContext(window->Display, window->GLContext);
eglTerminate(window->Display);
}
if (window->Event != nullptr)
screen_destroy_event(window->Event);
if (window->Window != nullptr)
screen_destroy_window(window->Window);
if (window->Context != nullptr)
screen_destroy_context(window->Context);
}
static bool ProcessQNXEvents(QNXWindow* window)
{
for (;;)
{
if (screen_get_event(window->Context, window->Event, 0) != 0)
return false;
int type = SCREEN_EVENT_NONE;
if (screen_get_event_property_iv(window->Event, SCREEN_PROPERTY_TYPE, &type) != 0)
return false;
if (type == SCREEN_EVENT_NONE)
return true;
ImGui_ImplQNX_ProcessEvent(window->Event);
if (type == SCREEN_EVENT_CLOSE)
return false;
if (type == SCREEN_EVENT_KEYBOARD)
{
int flags = 0;
int key_cap = 0;
if (screen_get_event_property_iv(window->Event, SCREEN_PROPERTY_FLAGS, &flags) == 0 &&
screen_get_event_property_iv(window->Event, SCREEN_PROPERTY_KEY_CAP, &key_cap) == 0 &&
(flags & SCREEN_FLAG_KEY_DOWN) != 0 && key_cap == KEYCODE_ESCAPE)
return false;
}
}
}
// Forward declarations of helper functions
bool CreateQNXWindow(QNXWindow* window);
void DestroyQNXWindow(QNXWindow* window);
bool ProcessQNXEvents(QNXWindow* window);
// Main code
int main(int, char**)
@@ -297,3 +170,138 @@ int main(int, char**)
return 0;
}
// Helper functions
bool CreateQNXWindow(QNXWindow* window)
{
if (screen_create_context(&window->Context, 0) != 0 ||
screen_create_window(&window->Window, window->Context) != 0 ||
screen_create_event(&window->Event) != 0)
{
fprintf(stderr, "QNX Screen initialization failed: %s\n", strerror(errno));
return false;
}
// A newly created QNX Screen window reports the fullscreen dimensions.
if (screen_get_window_property_iv(window->Window, SCREEN_PROPERTY_SIZE, window->Size) != 0 || window->Size[0] <= 0 || window->Size[1] <= 0)
{
fprintf(stderr, "Failed to obtain QNX Screen window size: %s\n", strerror(errno));
return false;
}
const int usage = SCREEN_USAGE_OPENGL_ES2 | SCREEN_USAGE_OPENGL_ES3 | SCREEN_USAGE_NATIVE;
const int transparency = SCREEN_TRANSPARENCY_NONE;
const int swap_interval = 1;
if (screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_USAGE, &usage) != 0 ||
screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_SIZE, window->Size) != 0 ||
screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_TRANSPARENCY, &transparency) != 0 ||
screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_SWAP_INTERVAL, &swap_interval) != 0)
{
fprintf(stderr, "Failed to configure QNX Screen window: %s\n", strerror(errno));
return false;
}
window->Display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (window->Display == EGL_NO_DISPLAY || eglInitialize(window->Display, nullptr, nullptr) != EGL_TRUE || eglBindAPI(EGL_OPENGL_ES_API) != EGL_TRUE)
{
fprintf(stderr, "EGL initialization failed: 0x%04x\n", eglGetError());
return false;
}
const EGLint config_attributes[] =
{
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_DEPTH_SIZE, 24,
EGL_STENCIL_SIZE, 8,
EGL_NONE
};
EGLConfig config = nullptr;
EGLint config_count = 0;
if (eglChooseConfig(window->Display, config_attributes, &config, 1, &config_count) != EGL_TRUE || config_count == 0)
{
fprintf(stderr, "eglChooseConfig() failed: 0x%04x\n", eglGetError());
return false;
}
EGLint native_visual = 0;
if (eglGetConfigAttrib(window->Display, config, EGL_NATIVE_VISUAL_ID, &native_visual) != EGL_TRUE ||
screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_FORMAT, &native_visual) != 0 ||
screen_create_window_buffers(window->Window, 2) != 0)
{
fprintf(stderr, "Failed to create QNX Screen buffers: %s\n", strerror(errno));
return false;
}
const EGLint context_attributes[] = { EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE };
window->GLContext = eglCreateContext(window->Display, config, EGL_NO_CONTEXT, context_attributes);
window->GLSurface = eglCreateWindowSurface(window->Display, config, window->Window, nullptr);
if (window->GLContext == EGL_NO_CONTEXT || window->GLSurface == EGL_NO_SURFACE ||
eglMakeCurrent(window->Display, window->GLSurface, window->GLSurface, window->GLContext) != EGL_TRUE ||
eglSwapInterval(window->Display, 1) != EGL_TRUE)
{
fprintf(stderr, "EGL context creation failed: 0x%04x\n", eglGetError());
return false;
}
const int visible = 1;
if (screen_set_window_property_iv(window->Window, SCREEN_PROPERTY_VISIBLE, &visible) != 0)
{
fprintf(stderr, "Failed to show QNX Screen window: %s\n", strerror(errno));
return false;
}
return true;
}
void DestroyQNXWindow(QNXWindow* window)
{
if (window->Display != EGL_NO_DISPLAY)
{
eglMakeCurrent(window->Display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (window->GLSurface != EGL_NO_SURFACE)
eglDestroySurface(window->Display, window->GLSurface);
if (window->GLContext != EGL_NO_CONTEXT)
eglDestroyContext(window->Display, window->GLContext);
eglTerminate(window->Display);
}
if (window->Event != nullptr)
screen_destroy_event(window->Event);
if (window->Window != nullptr)
screen_destroy_window(window->Window);
if (window->Context != nullptr)
screen_destroy_context(window->Context);
}
bool ProcessQNXEvents(QNXWindow* window)
{
for (;;)
{
if (screen_get_event(window->Context, window->Event, 0) != 0)
return false;
int type = SCREEN_EVENT_NONE;
if (screen_get_event_property_iv(window->Event, SCREEN_PROPERTY_TYPE, &type) != 0)
return false;
if (type == SCREEN_EVENT_NONE)
return true;
ImGui_ImplQNX_ProcessEvent(window->Event);
if (type == SCREEN_EVENT_CLOSE)
return false;
if (type == SCREEN_EVENT_KEYBOARD)
{
int flags = 0;
int key_cap = 0;
if (screen_get_event_property_iv(window->Event, SCREEN_PROPERTY_FLAGS, &flags) == 0 &&
screen_get_event_property_iv(window->Event, SCREEN_PROPERTY_KEY_CAP, &key_cap) == 0 &&
(flags & SCREEN_FLAG_KEY_DOWN) != 0 && key_cap == KEYCODE_ESCAPE)
return false;
}
}
}

19
examples/example_qnx_vulkan/.gitignore vendored
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@@ -1,19 +0,0 @@
# ignore all files
*
# unignore all dirs
!/**/
# unignore all with extensions
!*.*
# unignore makefiles
!Makefile
# re-ignore qnx build artefacts
*.o
*.so*
*.a
*.pinfo
*.dep
*.gcno

7
examples/example_qnx_vulkan/example_qnx_vulkan.use
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@@ -1,7 +0,0 @@
Dear ImGui QNX Screen + Vulkan example
Usage: example_qnx_vulkan
The example uses the fullscreen size reported by QNX Screen, creates a VK_QNX_screen_surface
swapchain, displays the Dear ImGui demo UI, and exits when Escape is pressed
or the Screen window receives a close event.