Changelog, tweak OpenGL3 backends. (ocornut#3061), update Gallery thr…

…ead links.

docs/CHANGELOG.txt

@@ -68,6 +68,7 @@ Other Changes:
 - CI: Added more tests on the continuous-integration server: extra warnings for Clang/GCC, building
   SDL+Metal example, building imgui_freetype.cpp, more compile-time imconfig.h settings: disabling
   obsolete functions, enabling 32-bit ImDrawIdx, enabling 32-bit ImWchar, disabling demo. [@rokups]
+- Backends: OpenGL3: Added include support for older glbinding 2.x loader. (#3061) [@DonKult]
 - Backends: Win32: Added ImGui_ImplWin32_EnableDpiAwareness(), ImGui_ImplWin32_GetDpiScaleForHwnd(),
   ImGui_ImplWin32_GetDpiScaleForMonitor() helpers functions (backported from the docking branch).
   Those functions makes it easier for example apps to support hi-dpi features without setting up
@@ -172,7 +173,7 @@ Other Changes:
 - Examples: OpenGL: Explicitly adding -DIMGUI_IMPL_OPENGL_LOADER_GL3W to Makefile to match linking
   settings (otherwise if another loader such as Glew is accessible, the OpenGL3 backend might
   automatically use it). (#2919, #2798)
-- Examples: OpenGL: Added support for glbindings OpenGL loader. (#2870) [@rokups]
+- Examples: OpenGL: Added support for glbinding OpenGL loader. (#2870) [@rokups]
 - Examples: Emscripten: Demonstrating embedding fonts in Makefile and code. (#2953) [@Oipo]
 - Examples: Metal: Wrapped main loop in @autoreleasepool block to ensure allocations get freed
   even if underlying system event loop gets paused due to app nap. (#2910, #2917) [@bear24rw]

docs/FAQ.md

@@ -552,7 +552,7 @@ You may take a look at:
 
 - [Quotes](https://github.com/ocornut/imgui/wiki/Quotes)
 - [Software using Dear ImGui](https://github.com/ocornut/imgui/wiki/Software-using-dear-imgui)
-- [Gallery](https://github.com/ocornut/imgui/issues/2847)
+- [Gallery](https://github.com/ocornut/imgui/issues/3075)
 
 ##### [Return to Index](#index)
 
@@ -598,7 +598,7 @@ There is an auto-generated [c-api for Dear ImGui (cimgui)](https://github.com/ci
 - Individuals: you can support continued maintenance and development via PayPal donations. See [README](https://github.com/ocornut/imgui/blob/master/docs/README.md).
 - If you are experienced with Dear ImGui and C++, look at the [GitHub Issues](https://github.com/ocornut/imgui/issues), look at the [Wiki](https://github.com/ocornut/imgui/wiki), read [docs/TODO.txt](https://github.com/ocornut/imgui/blob/master/docs/TODO.txt) and see how you want to help and can help!
 - Disclose your usage of Dear ImGui via a dev blog post, a tweet, a screenshot, a mention somewhere etc.
-You may post screenshot or links in the [gallery threads](https://github.com/ocornut/imgui/issues/2847). Visuals are ideal as they inspire other programmers. Disclosing your use of dear imgui help the library grow credibility, and help other teams and programmers with taking decisions.
+You may post screenshot or links in the [gallery threads](https://github.com/ocornut/imgui/issues/3075). Visuals are ideal as they inspire other programmers. Disclosing your use of dear imgui help the library grow credibility, and help other teams and programmers with taking decisions.
 - If you have issues or if you need to hack into the library, even if you don't expect any support it is useful that you share your issues or sometimes incomplete PR.
 
 ##### [Return to Index](#index)

docs/README.md

@@ -131,7 +131,7 @@ Some of the goals for 2020 are:
 
 ### Gallery
 
-For more user-submitted screenshots of projects using Dear ImGui, check out the [Gallery Threads](https://github.com/ocornut/imgui/issues/2847)!
+For more user-submitted screenshots of projects using Dear ImGui, check out the [Gallery Threads](https://github.com/ocornut/imgui/issues/3075)!
 
 Custom engine
 [![screenshot game](https://raw.githubusercontent.com/wiki/ocornut/imgui/web/v149/gallery_TheDragonsTrap-01-thumb.jpg)](https://cloud.githubusercontent.com/assets/8225057/20628927/33e14cac-b329-11e6-80f6-9524e93b048a.png)
@@ -164,7 +164,7 @@ You may also peak at the [Multi-Viewport](https://github.com/ocornut/imgui/issue
 
 **Who uses Dear ImGui?**
 
-See the [Quotes](https://github.com/ocornut/imgui/wiki/Quotes), [Sponsors](https://github.com/ocornut/imgui/wiki/Sponsors), [Software using dear imgui](https://github.com/ocornut/imgui/wiki/Software-using-dear-imgui) Wiki pages for an idea of who is using Dear ImGui. Please add your game/software if you can! Also see the [Gallery Threads](https://github.com/ocornut/imgui/issues/2847)!
+See the [Quotes](https://github.com/ocornut/imgui/wiki/Quotes), [Sponsors](https://github.com/ocornut/imgui/wiki/Sponsors), [Software using dear imgui](https://github.com/ocornut/imgui/wiki/Software-using-dear-imgui) Wiki pages for an idea of who is using Dear ImGui. Please add your game/software if you can! Also see the [Gallery Threads](https://github.com/ocornut/imgui/issues/3075)!
 
 How to help
 -----------

examples/README.txt

@@ -199,7 +199,7 @@ example_glfw_opengl2/
     GLFW + OpenGL2 example (legacy, fixed pipeline).
     = main.cpp + imgui_impl_glfw.cpp + imgui_impl_opengl2.cpp
     **DO NOT USE OPENGL2 CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL (SHADERS, VBO, VAO, etc.)**
-    **Prefer using OPENGL3 code (with gl3w/glew/glad/glbindings, you can replace the OpenGL function loader)**
+    **Prefer using OPENGL3 code (with gl3w/glew/glad/glbinding, you can replace the OpenGL function loader)**
     This code is mostly provided as a reference to learn about Dear ImGui integration, because it is shorter.
     If your code is using GL3+ context or any semi modern OpenGL calls, using this renderer is likely to
     make things more complicated, will require your code to reset many OpenGL attributes to their initial
@@ -248,7 +248,7 @@ example_sdl_opengl2/
     SDL2 (Win32, Mac, Linux etc.) + OpenGL example (legacy, fixed pipeline).
     = main.cpp + imgui_impl_sdl.cpp + imgui_impl_opengl2.cpp
     **DO NOT USE OPENGL2 CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL (SHADERS, VBO, VAO, etc.)**
-    **Prefer using OPENGL3 code (with gl3w/glew/glad/glbindings, you can replace the OpenGL function loader)**
+    **Prefer using OPENGL3 code (with gl3w/glew/glad/glbinding, you can replace the OpenGL function loader)**
     This code is mostly provided as a reference to learn about Dear ImGui integration, because it is shorter.
     If your code is using GL3+ context or any semi modern OpenGL calls, using this renderer is likely to
     make things more complicated, will require your code to reset many OpenGL attributes to their initial

examples/example_glfw_opengl3/main.cpp

@@ -12,18 +12,19 @@
 //  Helper libraries are often used for this purpose! Here we are supporting a few common ones (gl3w, glew, glad).
 //  You may use another loader/header of your choice (glext, glLoadGen, etc.), or chose to manually implement your own.
 #if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
-#include <GL/gl3w.h>    // Initialize with gl3wInit()
+#include <GL/gl3w.h>            // Initialize with gl3wInit()
 #elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
-#include <GL/glew.h>    // Initialize with glewInit()
+#include <GL/glew.h>            // Initialize with glewInit()
 #elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
-#include <glad/glad.h>  // Initialize with gladLoadGL()
-#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2) || defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
-#define GLFW_INCLUDE_NONE         // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
-#if defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
-#include <glbinding/Binding.h>    // Initialize with glbinding::Binding::initialize()
-#else
-#include <glbinding/glbinding.h>  // Initialize with glbinding::initialize()
-#endif
+#include <glad/glad.h>          // Initialize with gladLoadGL()
+#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
+#define GLFW_INCLUDE_NONE       // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
+#include <glbinding/Binding.h>  // Initialize with glbinding::Binding::initialize()
+#include <glbinding/gl/gl.h>
+using namespace gl;
+#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
+#define GLFW_INCLUDE_NONE       // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
+#include <glbinding/glbinding.h>// Initialize with glbinding::initialize()
 #include <glbinding/gl/gl.h>
 using namespace gl;
 #else

examples/example_sdl_opengl3/main.cpp

@@ -14,17 +14,19 @@
 //  Helper libraries are often used for this purpose! Here we are supporting a few common ones (gl3w, glew, glad).
 //  You may use another loader/header of your choice (glext, glLoadGen, etc.), or chose to manually implement your own.
 #if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
-#include <GL/gl3w.h>    // Initialize with gl3wInit()
+#include <GL/gl3w.h>            // Initialize with gl3wInit()
 #elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
-#include <GL/glew.h>    // Initialize with glewInit()
+#include <GL/glew.h>            // Initialize with glewInit()
 #elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
-#include <glad/glad.h>  // Initialize with gladLoadGL()
-#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2) || defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
-#if defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
-#include <glbinding/Binding.h>    // Initialize with glbinding::Binding::initialize()
-#else
-#include <glbinding/glbinding.h>  // Initialize with glbinding::initialize()
-#endif
+#include <glad/glad.h>          // Initialize with gladLoadGL()
+#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
+#define GLFW_INCLUDE_NONE       // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
+#include <glbinding/Binding.h>  // Initialize with glbinding::Binding::initialize()
+#include <glbinding/gl/gl.h>
+using namespace gl;
+#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
+#define GLFW_INCLUDE_NONE       // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
+#include <glbinding/glbinding.h>// Initialize with glbinding::initialize()
 #include <glbinding/gl/gl.h>
 using namespace gl;
 #else

examples/imgui_impl_opengl3.cpp

@@ -13,7 +13,8 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
-//  2020-01-07: OpenGL: Added support for glbindings OpenGL loader.
+//  2020-03-24: OpenGL: Added support for glbinding 2.x OpenGL loader.
+//  2020-01-07: OpenGL: Added support for glbinding 3.x OpenGL loader.
 //  2019-10-25: OpenGL: Using a combination of GL define and runtime GL version to decide whether to use glDrawElementsBaseVertex(). Fix building with pre-3.2 GL loaders.
 //  2019-09-22: OpenGL: Detect default GL loader using __has_include compiler facility.
 //  2019-09-16: OpenGL: Tweak initialization code to allow application calling ImGui_ImplOpenGL3_CreateFontsTexture() before the first NewFrame() call.
@@ -83,22 +84,19 @@
 #if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3)
 #if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV)) || (defined(__ANDROID__))
 #define IMGUI_IMPL_OPENGL_ES3           // iOS, Android  -> GL ES 3, "#version 300 es"
-#undef IMGUI_IMPL_OPENGL_LOADER_GL3W
-#undef IMGUI_IMPL_OPENGL_LOADER_GLEW
-#undef IMGUI_IMPL_OPENGL_LOADER_GLAD
-#undef IMGUI_IMPL_OPENGL_LOADER_GLBINDING2
-#undef IMGUI_IMPL_OPENGL_LOADER_GLBINDING3
-#undef IMGUI_IMPL_OPENGL_LOADER_CUSTOM
 #elif defined(__EMSCRIPTEN__)
 #define IMGUI_IMPL_OPENGL_ES2           // Emscripten    -> GL ES 2, "#version 100"
+#endif
+#endif
+
+#if defined(IMGUI_IMPL_OPENGL_ES2) || defined(IMGUI_IMPL_OPENGL_ES3)
 #undef IMGUI_IMPL_OPENGL_LOADER_GL3W
 #undef IMGUI_IMPL_OPENGL_LOADER_GLEW
 #undef IMGUI_IMPL_OPENGL_LOADER_GLAD
 #undef IMGUI_IMPL_OPENGL_LOADER_GLBINDING2
 #undef IMGUI_IMPL_OPENGL_LOADER_GLBINDING3
 #undef IMGUI_IMPL_OPENGL_LOADER_CUSTOM
 #endif
-#endif
 
 // GL includes
 #if defined(IMGUI_IMPL_OPENGL_ES2)
@@ -115,18 +113,20 @@
 //  Helper libraries are often used for this purpose! Here we are supporting a few common ones (gl3w, glew, glad).
 //  You may use another loader/header of your choice (glext, glLoadGen, etc.), or chose to manually implement your own.
 #if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
-#include <GL/gl3w.h>    // Needs to be initialized with gl3wInit() in user's code
+#include <GL/gl3w.h>            // Needs to be initialized with gl3wInit() in user's code
 #elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
-#include <GL/glew.h>    // Needs to be initialized with glewInit() in user's code
+#include <GL/glew.h>            // Needs to be initialized with glewInit() in user's code.
 #elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
-#include <glad/glad.h>  // Needs to be initialized with gladLoadGL() in user's code
-#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2) || defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
-#include <glbinding/gl/gl.h>  // Initialize with glbinding::initialize()
-#if defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
-#include <glbinding/Binding.h>
-#else
-#include <glbinding/glbinding.h>
-#endif
+#include <glad/glad.h>          // Needs to be initialized with gladLoadGL() in user's code.
+#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
+#define GLFW_INCLUDE_NONE       // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
+#include <glbinding/Binding.h>  // Needs to be initialized with glbinding::Binding::initialize() in user's code.
+#include <glbinding/gl/gl.h>
+using namespace gl;
+#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
+#define GLFW_INCLUDE_NONE       // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
+#include <glbinding/glbinding.h>// Needs to be initialized with glbinding::initialize() in user's code.
+#include <glbinding/gl/gl.h>
 using namespace gl;
 #else
 #include IMGUI_IMPL_OPENGL_LOADER_CUSTOM
@@ -203,8 +203,10 @@ bool    ImGui_ImplOpenGL3_Init(const char* glsl_version)
     gl_loader = "glbinding2";
 #elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
     gl_loader = "glbinding3";
-#else // IMGUI_IMPL_OPENGL_LOADER_CUSTOM
-    gl_loader = "Custom";
+#elif defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
+    gl_loader = "custom";
+#else
+    gl_loader = "none";
 #endif
 
     // Make a dummy GL call (we don't actually need the result)

imgui.cpp

@@ -10,7 +10,7 @@
 // - FAQ                   http://dearimgui.org/faq
 // - Homepage & latest     https://github.com/ocornut/imgui
 // - Releases & changelog  https://github.com/ocornut/imgui/releases
-// - Gallery               https://github.com/ocornut/imgui/issues/2847 (please post your screenshots/video there!)
+// - Gallery               https://github.com/ocornut/imgui/issues/3075 (please post your screenshots/video there!)
 // - Glossary              https://github.com/ocornut/imgui/wiki/Glossary
 // - Wiki                  https://github.com/ocornut/imgui/wiki
 // - Issues & support      https://github.com/ocornut/imgui/issues
@@ -783,7 +783,7 @@ CODE
     - If you are experienced with Dear ImGui and C++, look at the github issues, look at the Wiki, read docs/TODO.txt
       and see how you want to help and can help!
     - Disclose your usage of Dear ImGui via a dev blog post, a tweet, a screenshot, a mention somewhere etc.
-      You may post screenshot or links in the gallery threads (github.com/ocornut/imgui/issues/2847). Visuals are ideal as they inspire other programmers.
+      You may post screenshot or links in the gallery threads (github.com/ocornut/imgui/issues/3075). Visuals are ideal as they inspire other programmers.
       But even without visuals, disclosing your use of dear imgui help the library grow credibility, and help other teams and programmers with taking decisions.
     - If you have issues or if you need to hack into the library, even if you don't expect any support it is useful that you share your issues (on github or privately).
 

imgui.h

@@ -11,7 +11,7 @@
 // - FAQ                   http://dearimgui.org/faq
 // - Homepage & latest     https://github.com/ocornut/imgui
 // - Releases & changelog  https://github.com/ocornut/imgui/releases
-// - Gallery               https://github.com/ocornut/imgui/issues/2847 (please post your screenshots/video there!)
+// - Gallery               https://github.com/ocornut/imgui/issues/3075 (please post your screenshots/video there!)
 // - Glossary              https://github.com/ocornut/imgui/wiki/Glossary
 // - Wiki                  https://github.com/ocornut/imgui/wiki
 // - Issues & support      https://github.com/ocornut/imgui/issues