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[Qt] Initial Imgui integration
This commit is contained in:
wheremyfoodat
parent
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211 changed files with 49460 additions and 21918 deletions
669
third_party/imgui/backends/imgui_impl_opengl3.cpp
vendored
669
third_party/imgui/backends/imgui_impl_opengl3.cpp
vendored
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@ -5,14 +5,48 @@
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// Implemented features:
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// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
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// [x] Renderer: Desktop GL only: Support for large meshes (64k+ vertices) with 16-bit indices.
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// [X] Renderer: Large meshes support (64k+ vertices) with 16-bit indices (Desktop OpenGL only).
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// [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
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// You can copy and use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
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// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
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// Read online: https://github.com/ocornut/imgui/tree/master/docs
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// About WebGL/ES:
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// - You need to '#define IMGUI_IMPL_OPENGL_ES2' or '#define IMGUI_IMPL_OPENGL_ES3' to use WebGL or OpenGL ES.
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// - This is done automatically on iOS, Android and Emscripten targets.
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// - For other targets, the define needs to be visible from the imgui_impl_opengl3.cpp compilation unit. If unsure, define globally or in imconfig.h.
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// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
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// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
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// Learn about Dear ImGui:
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// - FAQ https://dearimgui.com/faq
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// - Getting Started https://dearimgui.com/getting-started
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// - Documentation https://dearimgui.com/docs (same as your local docs/ folder).
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// - Introduction, links and more at the top of imgui.cpp
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// CHANGELOG
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// (minor and older changes stripped away, please see git history for details)
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// 2023-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
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// 2024-01-09: OpenGL: Update GL3W based imgui_impl_opengl3_loader.h to load "libGL.so" and variants, fixing regression on distros missing a symlink.
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// 2023-11-08: OpenGL: Update GL3W based imgui_impl_opengl3_loader.h to load "libGL.so" instead of "libGL.so.1", accommodating for NetBSD systems having only "libGL.so.3" available. (#6983)
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// 2023-10-05: OpenGL: Rename symbols in our internal loader so that LTO compilation with another copy of gl3w is possible. (#6875, #6668, #4445)
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// 2023-06-20: OpenGL: Fixed erroneous use glGetIntegerv(GL_CONTEXT_PROFILE_MASK) on contexts lower than 3.2. (#6539, #6333)
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// 2023-05-09: OpenGL: Support for glBindSampler() backup/restore on ES3. (#6375)
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// 2023-04-18: OpenGL: Restore front and back polygon mode separately when supported by context. (#6333)
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// 2023-03-23: OpenGL: Properly restoring "no shader program bound" if it was the case prior to running the rendering function. (#6267, #6220, #6224)
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// 2023-03-15: OpenGL: Fixed GL loader crash when GL_VERSION returns NULL. (#6154, #4445, #3530)
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// 2023-03-06: OpenGL: Fixed restoration of a potentially deleted OpenGL program, by calling glIsProgram(). (#6220, #6224)
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// 2022-11-09: OpenGL: Reverted use of glBufferSubData(), too many corruptions issues + old issues seemingly can't be reproed with Intel drivers nowadays (revert 2021-12-15 and 2022-05-23 changes).
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// 2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
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// 2022-09-27: OpenGL: Added ability to '#define IMGUI_IMPL_OPENGL_DEBUG'.
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// 2022-05-23: OpenGL: Reworking 2021-12-15 "Using buffer orphaning" so it only happens on Intel GPU, seems to cause problems otherwise. (#4468, #4825, #4832, #5127).
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// 2022-05-13: OpenGL: Fixed state corruption on OpenGL ES 2.0 due to not preserving GL_ELEMENT_ARRAY_BUFFER_BINDING and vertex attribute states.
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// 2021-12-15: OpenGL: Using buffer orphaning + glBufferSubData(), seems to fix leaks with multi-viewports with some Intel HD drivers.
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// 2021-08-23: OpenGL: Fixed ES 3.0 shader ("#version 300 es") use normal precision floats to avoid wobbly rendering at HD resolutions.
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// 2021-08-19: OpenGL: Embed and use our own minimal GL loader (imgui_impl_opengl3_loader.h), removing requirement and support for third-party loader.
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// 2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX).
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// 2021-06-25: OpenGL: Use OES_vertex_array extension on Emscripten + backup/restore current state.
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// 2021-06-21: OpenGL: Destroy individual vertex/fragment shader objects right after they are linked into the main shader.
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// 2021-05-24: OpenGL: Access GL_CLIP_ORIGIN when "GL_ARB_clip_control" extension is detected, inside of just OpenGL 4.5 version.
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// 2021-05-19: OpenGL: Replaced direct access to ImDrawCmd::TextureId with a call to ImDrawCmd::GetTexID(). (will become a requirement)
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// 2021-04-06: OpenGL: Don't try to read GL_CLIP_ORIGIN unless we're OpenGL 4.5 or greater.
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// 2021-02-18: OpenGL: Change blending equation to preserve alpha in output buffer.
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// 2021-01-03: OpenGL: Backup, setup and restore GL_STENCIL_TEST state.
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// 2020-10-23: OpenGL: Backup, setup and restore GL_PRIMITIVE_RESTART state.
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@ -44,7 +78,7 @@
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// 2018-06-08: Misc: Extracted imgui_impl_opengl3.cpp/.h away from the old combined GLFW/SDL+OpenGL3 examples.
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// 2018-06-08: OpenGL: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
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// 2018-05-25: OpenGL: Removed unnecessary backup/restore of GL_ELEMENT_ARRAY_BUFFER_BINDING since this is part of the VAO state.
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// 2018-05-14: OpenGL: Making the call to glBindSampler() optional so 3.2 context won't fail if the function is a NULL pointer.
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// 2018-05-14: OpenGL: Making the call to glBindSampler() optional so 3.2 context won't fail if the function is a nullptr pointer.
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// 2018-03-06: OpenGL: Added const char* glsl_version parameter to ImGui_ImplOpenGL3_Init() so user can override the GLSL version e.g. "#version 150".
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// 2018-02-23: OpenGL: Create the VAO in the render function so the setup can more easily be used with multiple shared GL context.
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// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplSdlGL3_RenderDrawData() in the .h file so you can call it yourself.
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@ -78,53 +112,75 @@
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#endif
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#include "imgui.h"
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#ifndef IMGUI_DISABLE
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#include "imgui_impl_opengl3.h"
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#include <stdio.h>
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#if defined(_MSC_VER) && _MSC_VER <= 1500 // MSVC 2008 or earlier
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#include <stddef.h> // intptr_t
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#else
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#include <stdint.h> // intptr_t
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#if defined(__APPLE__)
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#include <TargetConditionals.h>
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#endif
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// Clang/GCC warnings with -Weverything
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#if defined(__clang__)
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wold-style-cast" // warning: use of old-style cast
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#pragma clang diagnostic ignored "-Wsign-conversion" // warning: implicit conversion changes signedness
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#pragma clang diagnostic ignored "-Wunused-macros" // warning: macro is not used
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#pragma clang diagnostic ignored "-Wnonportable-system-include-path"
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#pragma clang diagnostic ignored "-Wcast-function-type" // warning: cast between incompatible function types (for loader)
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#endif
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#if defined(__GNUC__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wpragmas" // warning: unknown option after '#pragma GCC diagnostic' kind
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#pragma GCC diagnostic ignored "-Wunknown-warning-option" // warning: unknown warning group 'xxx'
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#pragma GCC diagnostic ignored "-Wcast-function-type" // warning: cast between incompatible function types (for loader)
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#endif
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// GL includes
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#if defined(IMGUI_IMPL_OPENGL_ES2)
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#include <GLES2/gl2.h>
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#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV))
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#include <OpenGLES/ES2/gl.h> // Use GL ES 2
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#else
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#include <GLES2/gl2.h> // Use GL ES 2
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#endif
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#if defined(__EMSCRIPTEN__)
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#ifndef GL_GLEXT_PROTOTYPES
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#define GL_GLEXT_PROTOTYPES
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#endif
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#include <GLES2/gl2ext.h>
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#endif
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#elif defined(IMGUI_IMPL_OPENGL_ES3)
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#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV))
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#include <OpenGLES/ES3/gl.h> // Use GL ES 3
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#else
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#include <GLES3/gl3.h> // Use GL ES 3
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#endif
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#else
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// About Desktop OpenGL function loaders:
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// Modern desktop OpenGL doesn't have a standard portable header file to load OpenGL function pointers.
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// Helper libraries are often used for this purpose! Here we are supporting a few common ones (gl3w, glew, glad).
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// You may use another loader/header of your choice (glext, glLoadGen, etc.), or chose to manually implement your own.
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#if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
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#include <GL/gl3w.h> // Needs to be initialized with gl3wInit() in user's code
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#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
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#include <GL/glew.h> // Needs to be initialized with glewInit() in user's code.
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#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
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#include <glad/glad.h> // Needs to be initialized with gladLoadGL() in user's code.
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#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD2)
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#include <glad/gl.h> // Needs to be initialized with gladLoadGL(...) or gladLoaderLoadGL() in user's code.
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#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
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#ifndef GLFW_INCLUDE_NONE
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#define GLFW_INCLUDE_NONE // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
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#elif !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
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// Modern desktop OpenGL doesn't have a standard portable header file to load OpenGL function pointers.
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// Helper libraries are often used for this purpose! Here we are using our own minimal custom loader based on gl3w.
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// In the rest of your app/engine, you can use another loader of your choice (gl3w, glew, glad, glbinding, glext, glLoadGen, etc.).
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// If you happen to be developing a new feature for this backend (imgui_impl_opengl3.cpp):
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// - You may need to regenerate imgui_impl_opengl3_loader.h to add new symbols. See https://github.com/dearimgui/gl3w_stripped
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// - You can temporarily use an unstripped version. See https://github.com/dearimgui/gl3w_stripped/releases
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// Changes to this backend using new APIs should be accompanied by a regenerated stripped loader version.
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#define IMGL3W_IMPL
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#include "imgui_impl_opengl3_loader.h"
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#endif
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#include <glbinding/Binding.h> // Needs to be initialized with glbinding::Binding::initialize() in user's code.
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#include <glbinding/gl/gl.h>
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using namespace gl;
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#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
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#ifndef GLFW_INCLUDE_NONE
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#define GLFW_INCLUDE_NONE // GLFW including OpenGL headers causes ambiguity or multiple definition errors.
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#endif
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#include <glbinding/glbinding.h>// Needs to be initialized with glbinding::initialize() in user's code.
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#include <glbinding/gl/gl.h>
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using namespace gl;
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#else
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#include IMGUI_IMPL_OPENGL_LOADER_CUSTOM
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// Vertex arrays are not supported on ES2/WebGL1 unless Emscripten which uses an extension
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#ifndef IMGUI_IMPL_OPENGL_ES2
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#define IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
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#elif defined(__EMSCRIPTEN__)
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#define IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
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#define glBindVertexArray glBindVertexArrayOES
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#define glGenVertexArrays glGenVertexArraysOES
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#define glDeleteVertexArrays glDeleteVertexArraysOES
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#define GL_VERTEX_ARRAY_BINDING GL_VERTEX_ARRAY_BINDING_OES
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#endif
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// Desktop GL 2.0+ has glPolygonMode() which GL ES and WebGL don't have.
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#ifdef GL_POLYGON_MODE
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#define IMGUI_IMPL_HAS_POLYGON_MODE
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#endif
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// Desktop GL 3.2+ has glDrawElementsBaseVertex() which GL ES and WebGL don't have.
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@ -132,8 +188,8 @@ using namespace gl;
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#define IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
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#endif
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// Desktop GL 3.3+ has glBindSampler()
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#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && defined(GL_VERSION_3_3)
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// Desktop GL 3.3+ and GL ES 3.0+ have glBindSampler()
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#if !defined(IMGUI_IMPL_OPENGL_ES2) && (defined(IMGUI_IMPL_OPENGL_ES3) || defined(GL_VERSION_3_3))
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#define IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
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#endif
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@ -142,20 +198,107 @@ using namespace gl;
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#define IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
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#endif
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// Desktop GL use extension detection
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#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3)
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#define IMGUI_IMPL_OPENGL_MAY_HAVE_EXTENSIONS
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#endif
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// [Debugging]
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//#define IMGUI_IMPL_OPENGL_DEBUG
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#ifdef IMGUI_IMPL_OPENGL_DEBUG
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#include <stdio.h>
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#define GL_CALL(_CALL) do { _CALL; GLenum gl_err = glGetError(); if (gl_err != 0) fprintf(stderr, "GL error 0x%x returned from '%s'.\n", gl_err, #_CALL); } while (0) // Call with error check
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#else
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#define GL_CALL(_CALL) _CALL // Call without error check
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#endif
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// OpenGL Data
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static GLuint g_GlVersion = 0; // Extracted at runtime using GL_MAJOR_VERSION, GL_MINOR_VERSION queries (e.g. 320 for GL 3.2)
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static char g_GlslVersionString[32] = ""; // Specified by user or detected based on compile time GL settings.
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static GLuint g_FontTexture = 0;
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static GLuint g_ShaderHandle = 0, g_VertHandle = 0, g_FragHandle = 0;
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static GLint g_AttribLocationTex = 0, g_AttribLocationProjMtx = 0; // Uniforms location
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static GLuint g_AttribLocationVtxPos = 0, g_AttribLocationVtxUV = 0, g_AttribLocationVtxColor = 0; // Vertex attributes location
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static unsigned int g_VboHandle = 0, g_ElementsHandle = 0;
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struct ImGui_ImplOpenGL3_Data
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{
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GLuint GlVersion; // Extracted at runtime using GL_MAJOR_VERSION, GL_MINOR_VERSION queries (e.g. 320 for GL 3.2)
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char GlslVersionString[32]; // Specified by user or detected based on compile time GL settings.
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bool GlProfileIsES2;
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bool GlProfileIsES3;
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bool GlProfileIsCompat;
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GLint GlProfileMask;
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GLuint FontTexture;
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GLuint ShaderHandle;
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GLint AttribLocationTex; // Uniforms location
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GLint AttribLocationProjMtx;
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GLuint AttribLocationVtxPos; // Vertex attributes location
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GLuint AttribLocationVtxUV;
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GLuint AttribLocationVtxColor;
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unsigned int VboHandle, ElementsHandle;
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GLsizeiptr VertexBufferSize;
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GLsizeiptr IndexBufferSize;
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bool HasClipOrigin;
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bool UseBufferSubData;
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ImGui_ImplOpenGL3_Data() { memset((void*)this, 0, sizeof(*this)); }
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};
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// Backend data stored in io.BackendRendererUserData to allow support for multiple Dear ImGui contexts
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// It is STRONGLY preferred that you use docking branch with multi-viewports (== single Dear ImGui context + multiple windows) instead of multiple Dear ImGui contexts.
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static ImGui_ImplOpenGL3_Data* ImGui_ImplOpenGL3_GetBackendData()
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{
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return ImGui::GetCurrentContext() ? (ImGui_ImplOpenGL3_Data*)ImGui::GetIO().BackendRendererUserData : nullptr;
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}
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// Forward Declarations
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static void ImGui_ImplOpenGL3_InitPlatformInterface();
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static void ImGui_ImplOpenGL3_ShutdownPlatformInterface();
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// OpenGL vertex attribute state (for ES 1.0 and ES 2.0 only)
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#ifndef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
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struct ImGui_ImplOpenGL3_VtxAttribState
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{
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GLint Enabled, Size, Type, Normalized, Stride;
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GLvoid* Ptr;
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void GetState(GLint index)
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{
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glGetVertexAttribiv(index, GL_VERTEX_ATTRIB_ARRAY_ENABLED, &Enabled);
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glGetVertexAttribiv(index, GL_VERTEX_ATTRIB_ARRAY_SIZE, &Size);
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glGetVertexAttribiv(index, GL_VERTEX_ATTRIB_ARRAY_TYPE, &Type);
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glGetVertexAttribiv(index, GL_VERTEX_ATTRIB_ARRAY_NORMALIZED, &Normalized);
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glGetVertexAttribiv(index, GL_VERTEX_ATTRIB_ARRAY_STRIDE, &Stride);
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glGetVertexAttribPointerv(index, GL_VERTEX_ATTRIB_ARRAY_POINTER, &Ptr);
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}
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void SetState(GLint index)
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{
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glVertexAttribPointer(index, Size, Type, (GLboolean)Normalized, Stride, Ptr);
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if (Enabled) glEnableVertexAttribArray(index); else glDisableVertexAttribArray(index);
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}
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};
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#endif
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// Functions
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bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
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{
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ImGuiIO& io = ImGui::GetIO();
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IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
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// Initialize our loader
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#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
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if (imgl3wInit() != 0)
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{
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fprintf(stderr, "Failed to initialize OpenGL loader!\n");
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return false;
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}
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#endif
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// Setup backend capabilities flags
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ImGui_ImplOpenGL3_Data* bd = IM_NEW(ImGui_ImplOpenGL3_Data)();
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io.BackendRendererUserData = (void*)bd;
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io.BackendRendererName = "imgui_impl_opengl3";
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// Query for GL version (e.g. 320 for GL 3.2)
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#if !defined(IMGUI_IMPL_OPENGL_ES2)
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#if defined(IMGUI_IMPL_OPENGL_ES2)
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// GLES 2
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bd->GlVersion = 200;
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bd->GlProfileIsES2 = true;
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#else
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// Desktop or GLES 3
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GLint major = 0;
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GLint minor = 0;
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glGetIntegerv(GL_MAJOR_VERSION, &major);
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@ -166,85 +309,107 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
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const char* gl_version = (const char*)glGetString(GL_VERSION);
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sscanf(gl_version, "%d.%d", &major, &minor);
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}
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g_GlVersion = (GLuint)(major * 100 + minor * 10);
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#else
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g_GlVersion = 200; // GLES 2
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bd->GlVersion = (GLuint)(major * 100 + minor * 10);
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#if defined(GL_CONTEXT_PROFILE_MASK)
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if (bd->GlVersion >= 320)
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glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &bd->GlProfileMask);
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bd->GlProfileIsCompat = (bd->GlProfileMask & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT) != 0;
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#endif
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#if defined(IMGUI_IMPL_OPENGL_ES3)
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bd->GlProfileIsES3 = true;
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#endif
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bd->UseBufferSubData = false;
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/*
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// Query vendor to enable glBufferSubData kludge
|
||||
#ifdef _WIN32
|
||||
if (const char* vendor = (const char*)glGetString(GL_VENDOR))
|
||||
if (strncmp(vendor, "Intel", 5) == 0)
|
||||
bd->UseBufferSubData = true;
|
||||
#endif
|
||||
*/
|
||||
#endif
|
||||
|
||||
#ifdef IMGUI_IMPL_OPENGL_DEBUG
|
||||
printf("GlVersion = %d\nGlProfileIsCompat = %d\nGlProfileMask = 0x%X\nGlProfileIsES2 = %d, GlProfileIsES3 = %d\nGL_VENDOR = '%s'\nGL_RENDERER = '%s'\n", bd->GlVersion, bd->GlProfileIsCompat, bd->GlProfileMask, bd->GlProfileIsES2, bd->GlProfileIsES3, (const char*)glGetString(GL_VENDOR), (const char*)glGetString(GL_RENDERER)); // [DEBUG]
|
||||
#endif
|
||||
|
||||
// Setup backend capabilities flags
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
io.BackendRendererName = "imgui_impl_opengl3";
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
|
||||
if (g_GlVersion >= 320)
|
||||
if (bd->GlVersion >= 320)
|
||||
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
|
||||
#endif
|
||||
io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports; // We can create multi-viewports on the Renderer side (optional)
|
||||
|
||||
// Store GLSL version string so we can refer to it later in case we recreate shaders.
|
||||
// Note: GLSL version is NOT the same as GL version. Leave this to NULL if unsure.
|
||||
// Note: GLSL version is NOT the same as GL version. Leave this to nullptr if unsure.
|
||||
if (glsl_version == nullptr)
|
||||
{
|
||||
#if defined(IMGUI_IMPL_OPENGL_ES2)
|
||||
if (glsl_version == NULL)
|
||||
glsl_version = "#version 100";
|
||||
#elif defined(IMGUI_IMPL_OPENGL_ES3)
|
||||
if (glsl_version == NULL)
|
||||
glsl_version = "#version 300 es";
|
||||
#elif defined(__APPLE__)
|
||||
if (glsl_version == NULL)
|
||||
glsl_version = "#version 150";
|
||||
#else
|
||||
if (glsl_version == NULL)
|
||||
glsl_version = "#version 130";
|
||||
#endif
|
||||
IM_ASSERT((int)strlen(glsl_version) + 2 < IM_ARRAYSIZE(g_GlslVersionString));
|
||||
strcpy(g_GlslVersionString, glsl_version);
|
||||
strcat(g_GlslVersionString, "\n");
|
||||
|
||||
// Debugging construct to make it easily visible in the IDE and debugger which GL loader has been selected.
|
||||
// The code actually never uses the 'gl_loader' variable! It is only here so you can read it!
|
||||
// If auto-detection fails or doesn't select the same GL loader file as used by your application,
|
||||
// you are likely to get a crash below.
|
||||
// You can explicitly select a loader by using '#define IMGUI_IMPL_OPENGL_LOADER_XXX' in imconfig.h or compiler command-line.
|
||||
const char* gl_loader = "Unknown";
|
||||
IM_UNUSED(gl_loader);
|
||||
#if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
|
||||
gl_loader = "GL3W";
|
||||
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
|
||||
gl_loader = "GLEW";
|
||||
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
|
||||
gl_loader = "GLAD";
|
||||
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD2)
|
||||
gl_loader = "GLAD2";
|
||||
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING2)
|
||||
gl_loader = "glbinding2";
|
||||
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLBINDING3)
|
||||
gl_loader = "glbinding3";
|
||||
#elif defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
|
||||
gl_loader = "custom";
|
||||
#else
|
||||
gl_loader = "none";
|
||||
#endif
|
||||
}
|
||||
IM_ASSERT((int)strlen(glsl_version) + 2 < IM_ARRAYSIZE(bd->GlslVersionString));
|
||||
strcpy(bd->GlslVersionString, glsl_version);
|
||||
strcat(bd->GlslVersionString, "\n");
|
||||
|
||||
// Make an arbitrary GL call (we don't actually need the result)
|
||||
// IF YOU GET A CRASH HERE: it probably means that you haven't initialized the OpenGL function loader used by this code.
|
||||
// Desktop OpenGL 3/4 need a function loader. See the IMGUI_IMPL_OPENGL_LOADER_xxx explanation above.
|
||||
// IF YOU GET A CRASH HERE: it probably means the OpenGL function loader didn't do its job. Let us know!
|
||||
GLint current_texture;
|
||||
glGetIntegerv(GL_TEXTURE_BINDING_2D, ¤t_texture);
|
||||
|
||||
// Detect extensions we support
|
||||
bd->HasClipOrigin = (bd->GlVersion >= 450);
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_EXTENSIONS
|
||||
GLint num_extensions = 0;
|
||||
glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
|
||||
for (GLint i = 0; i < num_extensions; i++)
|
||||
{
|
||||
const char* extension = (const char*)glGetStringi(GL_EXTENSIONS, i);
|
||||
if (extension != nullptr && strcmp(extension, "GL_ARB_clip_control") == 0)
|
||||
bd->HasClipOrigin = true;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
|
||||
ImGui_ImplOpenGL3_InitPlatformInterface();
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void ImGui_ImplOpenGL3_Shutdown()
|
||||
{
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
|
||||
ImGui_ImplOpenGL3_ShutdownPlatformInterface();
|
||||
ImGui_ImplOpenGL3_DestroyDeviceObjects();
|
||||
io.BackendRendererName = nullptr;
|
||||
io.BackendRendererUserData = nullptr;
|
||||
io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasViewports);
|
||||
IM_DELETE(bd);
|
||||
}
|
||||
|
||||
void ImGui_ImplOpenGL3_NewFrame()
|
||||
{
|
||||
if (!g_ShaderHandle)
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
IM_ASSERT(bd != nullptr && "Did you call ImGui_ImplOpenGL3_Init()?");
|
||||
|
||||
if (!bd->ShaderHandle)
|
||||
ImGui_ImplOpenGL3_CreateDeviceObjects();
|
||||
}
|
||||
|
||||
static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_width, int fb_height, GLuint vertex_array_object)
|
||||
{
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
|
||||
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, polygon fill
|
||||
glEnable(GL_BLEND);
|
||||
glBlendEquation(GL_FUNC_ADD);
|
||||
|
|
@ -254,29 +419,32 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_wid
|
|||
glDisable(GL_STENCIL_TEST);
|
||||
glEnable(GL_SCISSOR_TEST);
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
|
||||
if (g_GlVersion >= 310)
|
||||
if (bd->GlVersion >= 310)
|
||||
glDisable(GL_PRIMITIVE_RESTART);
|
||||
#endif
|
||||
#ifdef GL_POLYGON_MODE
|
||||
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
|
||||
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
|
||||
#endif
|
||||
|
||||
// Support for GL 4.5 rarely used glClipControl(GL_UPPER_LEFT)
|
||||
#if defined(GL_CLIP_ORIGIN) && !defined(__APPLE__)
|
||||
#if defined(GL_CLIP_ORIGIN)
|
||||
bool clip_origin_lower_left = true;
|
||||
GLenum current_clip_origin = 0; glGetIntegerv(GL_CLIP_ORIGIN, (GLint*)¤t_clip_origin);
|
||||
if (current_clip_origin == GL_UPPER_LEFT)
|
||||
clip_origin_lower_left = false;
|
||||
if (bd->HasClipOrigin)
|
||||
{
|
||||
GLenum current_clip_origin = 0; glGetIntegerv(GL_CLIP_ORIGIN, (GLint*)¤t_clip_origin);
|
||||
if (current_clip_origin == GL_UPPER_LEFT)
|
||||
clip_origin_lower_left = false;
|
||||
}
|
||||
#endif
|
||||
|
||||
// Setup viewport, orthographic projection matrix
|
||||
// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
|
||||
glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height);
|
||||
GL_CALL(glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height));
|
||||
float L = draw_data->DisplayPos.x;
|
||||
float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
|
||||
float T = draw_data->DisplayPos.y;
|
||||
float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
|
||||
#if defined(GL_CLIP_ORIGIN) && !defined(__APPLE__)
|
||||
#if defined(GL_CLIP_ORIGIN)
|
||||
if (!clip_origin_lower_left) { float tmp = T; T = B; B = tmp; } // Swap top and bottom if origin is upper left
|
||||
#endif
|
||||
const float ortho_projection[4][4] =
|
||||
|
|
@ -286,29 +454,29 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_wid
|
|||
{ 0.0f, 0.0f, -1.0f, 0.0f },
|
||||
{ (R+L)/(L-R), (T+B)/(B-T), 0.0f, 1.0f },
|
||||
};
|
||||
glUseProgram(g_ShaderHandle);
|
||||
glUniform1i(g_AttribLocationTex, 0);
|
||||
glUniformMatrix4fv(g_AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
|
||||
glUseProgram(bd->ShaderHandle);
|
||||
glUniform1i(bd->AttribLocationTex, 0);
|
||||
glUniformMatrix4fv(bd->AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
|
||||
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
|
||||
if (g_GlVersion >= 330)
|
||||
glBindSampler(0, 0); // We use combined texture/sampler state. Applications using GL 3.3 may set that otherwise.
|
||||
if (bd->GlVersion >= 330 || bd->GlProfileIsES3)
|
||||
glBindSampler(0, 0); // We use combined texture/sampler state. Applications using GL 3.3 and GL ES 3.0 may set that otherwise.
|
||||
#endif
|
||||
|
||||
(void)vertex_array_object;
|
||||
#ifndef IMGUI_IMPL_OPENGL_ES2
|
||||
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
glBindVertexArray(vertex_array_object);
|
||||
#endif
|
||||
|
||||
// Bind vertex/index buffers and setup attributes for ImDrawVert
|
||||
glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
|
||||
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_ElementsHandle);
|
||||
glEnableVertexAttribArray(g_AttribLocationVtxPos);
|
||||
glEnableVertexAttribArray(g_AttribLocationVtxUV);
|
||||
glEnableVertexAttribArray(g_AttribLocationVtxColor);
|
||||
glVertexAttribPointer(g_AttribLocationVtxPos, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, pos));
|
||||
glVertexAttribPointer(g_AttribLocationVtxUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, uv));
|
||||
glVertexAttribPointer(g_AttribLocationVtxColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, col));
|
||||
GL_CALL(glBindBuffer(GL_ARRAY_BUFFER, bd->VboHandle));
|
||||
GL_CALL(glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, bd->ElementsHandle));
|
||||
GL_CALL(glEnableVertexAttribArray(bd->AttribLocationVtxPos));
|
||||
GL_CALL(glEnableVertexAttribArray(bd->AttribLocationVtxUV));
|
||||
GL_CALL(glEnableVertexAttribArray(bd->AttribLocationVtxColor));
|
||||
GL_CALL(glVertexAttribPointer(bd->AttribLocationVtxPos, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)offsetof(ImDrawVert, pos)));
|
||||
GL_CALL(glVertexAttribPointer(bd->AttribLocationVtxUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)offsetof(ImDrawVert, uv)));
|
||||
GL_CALL(glVertexAttribPointer(bd->AttribLocationVtxColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)offsetof(ImDrawVert, col)));
|
||||
}
|
||||
|
||||
// OpenGL3 Render function.
|
||||
|
|
@ -322,19 +490,28 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
|||
if (fb_width <= 0 || fb_height <= 0)
|
||||
return;
|
||||
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
|
||||
// Backup GL state
|
||||
GLenum last_active_texture; glGetIntegerv(GL_ACTIVE_TEXTURE, (GLint*)&last_active_texture);
|
||||
glActiveTexture(GL_TEXTURE0);
|
||||
GLuint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, (GLint*)&last_program);
|
||||
GLuint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint*)&last_texture);
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
|
||||
GLuint last_sampler; if (g_GlVersion >= 330) { glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler); } else { last_sampler = 0; }
|
||||
GLuint last_sampler; if (bd->GlVersion >= 330 || bd->GlProfileIsES3) { glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler); } else { last_sampler = 0; }
|
||||
#endif
|
||||
GLuint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, (GLint*)&last_array_buffer);
|
||||
#ifndef IMGUI_IMPL_OPENGL_ES2
|
||||
#ifndef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
// This is part of VAO on OpenGL 3.0+ and OpenGL ES 3.0+.
|
||||
GLint last_element_array_buffer; glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &last_element_array_buffer);
|
||||
ImGui_ImplOpenGL3_VtxAttribState last_vtx_attrib_state_pos; last_vtx_attrib_state_pos.GetState(bd->AttribLocationVtxPos);
|
||||
ImGui_ImplOpenGL3_VtxAttribState last_vtx_attrib_state_uv; last_vtx_attrib_state_uv.GetState(bd->AttribLocationVtxUV);
|
||||
ImGui_ImplOpenGL3_VtxAttribState last_vtx_attrib_state_color; last_vtx_attrib_state_color.GetState(bd->AttribLocationVtxColor);
|
||||
#endif
|
||||
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
GLuint last_vertex_array_object; glGetIntegerv(GL_VERTEX_ARRAY_BINDING, (GLint*)&last_vertex_array_object);
|
||||
#endif
|
||||
#ifdef GL_POLYGON_MODE
|
||||
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
|
||||
GLint last_polygon_mode[2]; glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode);
|
||||
#endif
|
||||
GLint last_viewport[4]; glGetIntegerv(GL_VIEWPORT, last_viewport);
|
||||
|
|
@ -351,15 +528,15 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
|||
GLboolean last_enable_stencil_test = glIsEnabled(GL_STENCIL_TEST);
|
||||
GLboolean last_enable_scissor_test = glIsEnabled(GL_SCISSOR_TEST);
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
|
||||
GLboolean last_enable_primitive_restart = (g_GlVersion >= 310) ? glIsEnabled(GL_PRIMITIVE_RESTART) : GL_FALSE;
|
||||
GLboolean last_enable_primitive_restart = (bd->GlVersion >= 310) ? glIsEnabled(GL_PRIMITIVE_RESTART) : GL_FALSE;
|
||||
#endif
|
||||
|
||||
// Setup desired GL state
|
||||
// Recreate the VAO every time (this is to easily allow multiple GL contexts to be rendered to. VAO are not shared among GL contexts)
|
||||
// The renderer would actually work without any VAO bound, but then our VertexAttrib calls would overwrite the default one currently bound.
|
||||
GLuint vertex_array_object = 0;
|
||||
#ifndef IMGUI_IMPL_OPENGL_ES2
|
||||
glGenVertexArrays(1, &vertex_array_object);
|
||||
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
GL_CALL(glGenVertexArrays(1, &vertex_array_object));
|
||||
#endif
|
||||
ImGui_ImplOpenGL3_SetupRenderState(draw_data, fb_width, fb_height, vertex_array_object);
|
||||
|
||||
|
|
@ -373,13 +550,40 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
|||
const ImDrawList* cmd_list = draw_data->CmdLists[n];
|
||||
|
||||
// Upload vertex/index buffers
|
||||
glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)cmd_list->VtxBuffer.Size * (int)sizeof(ImDrawVert), (const GLvoid*)cmd_list->VtxBuffer.Data, GL_STREAM_DRAW);
|
||||
glBufferData(GL_ELEMENT_ARRAY_BUFFER, (GLsizeiptr)cmd_list->IdxBuffer.Size * (int)sizeof(ImDrawIdx), (const GLvoid*)cmd_list->IdxBuffer.Data, GL_STREAM_DRAW);
|
||||
// - OpenGL drivers are in a very sorry state nowadays....
|
||||
// During 2021 we attempted to switch from glBufferData() to orphaning+glBufferSubData() following reports
|
||||
// of leaks on Intel GPU when using multi-viewports on Windows.
|
||||
// - After this we kept hearing of various display corruptions issues. We started disabling on non-Intel GPU, but issues still got reported on Intel.
|
||||
// - We are now back to using exclusively glBufferData(). So bd->UseBufferSubData IS ALWAYS FALSE in this code.
|
||||
// We are keeping the old code path for a while in case people finding new issues may want to test the bd->UseBufferSubData path.
|
||||
// - See https://github.com/ocornut/imgui/issues/4468 and please report any corruption issues.
|
||||
const GLsizeiptr vtx_buffer_size = (GLsizeiptr)cmd_list->VtxBuffer.Size * (int)sizeof(ImDrawVert);
|
||||
const GLsizeiptr idx_buffer_size = (GLsizeiptr)cmd_list->IdxBuffer.Size * (int)sizeof(ImDrawIdx);
|
||||
if (bd->UseBufferSubData)
|
||||
{
|
||||
if (bd->VertexBufferSize < vtx_buffer_size)
|
||||
{
|
||||
bd->VertexBufferSize = vtx_buffer_size;
|
||||
GL_CALL(glBufferData(GL_ARRAY_BUFFER, bd->VertexBufferSize, nullptr, GL_STREAM_DRAW));
|
||||
}
|
||||
if (bd->IndexBufferSize < idx_buffer_size)
|
||||
{
|
||||
bd->IndexBufferSize = idx_buffer_size;
|
||||
GL_CALL(glBufferData(GL_ELEMENT_ARRAY_BUFFER, bd->IndexBufferSize, nullptr, GL_STREAM_DRAW));
|
||||
}
|
||||
GL_CALL(glBufferSubData(GL_ARRAY_BUFFER, 0, vtx_buffer_size, (const GLvoid*)cmd_list->VtxBuffer.Data));
|
||||
GL_CALL(glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, idx_buffer_size, (const GLvoid*)cmd_list->IdxBuffer.Data));
|
||||
}
|
||||
else
|
||||
{
|
||||
GL_CALL(glBufferData(GL_ARRAY_BUFFER, vtx_buffer_size, (const GLvoid*)cmd_list->VtxBuffer.Data, GL_STREAM_DRAW));
|
||||
GL_CALL(glBufferData(GL_ELEMENT_ARRAY_BUFFER, idx_buffer_size, (const GLvoid*)cmd_list->IdxBuffer.Data, GL_STREAM_DRAW));
|
||||
}
|
||||
|
||||
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
|
||||
{
|
||||
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
|
||||
if (pcmd->UserCallback != NULL)
|
||||
if (pcmd->UserCallback != nullptr)
|
||||
{
|
||||
// User callback, registered via ImDrawList::AddCallback()
|
||||
// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
|
||||
|
|
@ -391,47 +595,50 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
|||
else
|
||||
{
|
||||
// Project scissor/clipping rectangles into framebuffer space
|
||||
ImVec4 clip_rect;
|
||||
clip_rect.x = (pcmd->ClipRect.x - clip_off.x) * clip_scale.x;
|
||||
clip_rect.y = (pcmd->ClipRect.y - clip_off.y) * clip_scale.y;
|
||||
clip_rect.z = (pcmd->ClipRect.z - clip_off.x) * clip_scale.x;
|
||||
clip_rect.w = (pcmd->ClipRect.w - clip_off.y) * clip_scale.y;
|
||||
ImVec2 clip_min((pcmd->ClipRect.x - clip_off.x) * clip_scale.x, (pcmd->ClipRect.y - clip_off.y) * clip_scale.y);
|
||||
ImVec2 clip_max((pcmd->ClipRect.z - clip_off.x) * clip_scale.x, (pcmd->ClipRect.w - clip_off.y) * clip_scale.y);
|
||||
if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
|
||||
continue;
|
||||
|
||||
if (clip_rect.x < fb_width && clip_rect.y < fb_height && clip_rect.z >= 0.0f && clip_rect.w >= 0.0f)
|
||||
{
|
||||
// Apply scissor/clipping rectangle
|
||||
glScissor((int)clip_rect.x, (int)(fb_height - clip_rect.w), (int)(clip_rect.z - clip_rect.x), (int)(clip_rect.w - clip_rect.y));
|
||||
// Apply scissor/clipping rectangle (Y is inverted in OpenGL)
|
||||
GL_CALL(glScissor((int)clip_min.x, (int)((float)fb_height - clip_max.y), (int)(clip_max.x - clip_min.x), (int)(clip_max.y - clip_min.y)));
|
||||
|
||||
// Bind texture, Draw
|
||||
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->TextureId);
|
||||
// Bind texture, Draw
|
||||
GL_CALL(glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->GetTexID()));
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
|
||||
if (g_GlVersion >= 320)
|
||||
glDrawElementsBaseVertex(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)), (GLint)pcmd->VtxOffset);
|
||||
else
|
||||
if (bd->GlVersion >= 320)
|
||||
GL_CALL(glDrawElementsBaseVertex(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)), (GLint)pcmd->VtxOffset));
|
||||
else
|
||||
#endif
|
||||
glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)));
|
||||
}
|
||||
GL_CALL(glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx))));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Destroy the temporary VAO
|
||||
#ifndef IMGUI_IMPL_OPENGL_ES2
|
||||
glDeleteVertexArrays(1, &vertex_array_object);
|
||||
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
GL_CALL(glDeleteVertexArrays(1, &vertex_array_object));
|
||||
#endif
|
||||
|
||||
// Restore modified GL state
|
||||
glUseProgram(last_program);
|
||||
// This "glIsProgram()" check is required because if the program is "pending deletion" at the time of binding backup, it will have been deleted by now and will cause an OpenGL error. See #6220.
|
||||
if (last_program == 0 || glIsProgram(last_program)) glUseProgram(last_program);
|
||||
glBindTexture(GL_TEXTURE_2D, last_texture);
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
|
||||
if (g_GlVersion >= 330)
|
||||
if (bd->GlVersion >= 330 || bd->GlProfileIsES3)
|
||||
glBindSampler(0, last_sampler);
|
||||
#endif
|
||||
glActiveTexture(last_active_texture);
|
||||
#ifndef IMGUI_IMPL_OPENGL_ES2
|
||||
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
glBindVertexArray(last_vertex_array_object);
|
||||
#endif
|
||||
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
|
||||
#ifndef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, last_element_array_buffer);
|
||||
last_vtx_attrib_state_pos.SetState(bd->AttribLocationVtxPos);
|
||||
last_vtx_attrib_state_uv.SetState(bd->AttribLocationVtxUV);
|
||||
last_vtx_attrib_state_color.SetState(bd->AttribLocationVtxColor);
|
||||
#endif
|
||||
glBlendEquationSeparate(last_blend_equation_rgb, last_blend_equation_alpha);
|
||||
glBlendFuncSeparate(last_blend_src_rgb, last_blend_dst_rgb, last_blend_src_alpha, last_blend_dst_alpha);
|
||||
if (last_enable_blend) glEnable(GL_BLEND); else glDisable(GL_BLEND);
|
||||
|
|
@ -440,69 +647,85 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
|||
if (last_enable_stencil_test) glEnable(GL_STENCIL_TEST); else glDisable(GL_STENCIL_TEST);
|
||||
if (last_enable_scissor_test) glEnable(GL_SCISSOR_TEST); else glDisable(GL_SCISSOR_TEST);
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
|
||||
if (g_GlVersion >= 310) { if (last_enable_primitive_restart) glEnable(GL_PRIMITIVE_RESTART); else glDisable(GL_PRIMITIVE_RESTART); }
|
||||
if (bd->GlVersion >= 310) { if (last_enable_primitive_restart) glEnable(GL_PRIMITIVE_RESTART); else glDisable(GL_PRIMITIVE_RESTART); }
|
||||
#endif
|
||||
|
||||
#ifdef GL_POLYGON_MODE
|
||||
glPolygonMode(GL_FRONT_AND_BACK, (GLenum)last_polygon_mode[0]);
|
||||
#endif
|
||||
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
|
||||
// Desktop OpenGL 3.0 and OpenGL 3.1 had separate polygon draw modes for front-facing and back-facing faces of polygons
|
||||
if (bd->GlVersion <= 310 || bd->GlProfileIsCompat)
|
||||
{
|
||||
glPolygonMode(GL_FRONT, (GLenum)last_polygon_mode[0]);
|
||||
glPolygonMode(GL_BACK, (GLenum)last_polygon_mode[1]);
|
||||
}
|
||||
else
|
||||
{
|
||||
glPolygonMode(GL_FRONT_AND_BACK, (GLenum)last_polygon_mode[0]);
|
||||
}
|
||||
#endif // IMGUI_IMPL_HAS_POLYGON_MODE
|
||||
|
||||
glViewport(last_viewport[0], last_viewport[1], (GLsizei)last_viewport[2], (GLsizei)last_viewport[3]);
|
||||
glScissor(last_scissor_box[0], last_scissor_box[1], (GLsizei)last_scissor_box[2], (GLsizei)last_scissor_box[3]);
|
||||
(void)bd; // Not all compilation paths use this
|
||||
}
|
||||
|
||||
bool ImGui_ImplOpenGL3_CreateFontsTexture()
|
||||
{
|
||||
// Build texture atlas
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
|
||||
// Build texture atlas
|
||||
unsigned char* pixels;
|
||||
int width, height;
|
||||
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); // Load as RGBA 32-bit (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory.
|
||||
|
||||
// Upload texture to graphics system
|
||||
// (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
|
||||
GLint last_texture;
|
||||
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
|
||||
glGenTextures(1, &g_FontTexture);
|
||||
glBindTexture(GL_TEXTURE_2D, g_FontTexture);
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
||||
#ifdef GL_UNPACK_ROW_LENGTH
|
||||
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
|
||||
GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
|
||||
GL_CALL(glGenTextures(1, &bd->FontTexture));
|
||||
GL_CALL(glBindTexture(GL_TEXTURE_2D, bd->FontTexture));
|
||||
GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
|
||||
GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
|
||||
#ifdef GL_UNPACK_ROW_LENGTH // Not on WebGL/ES
|
||||
GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
|
||||
#endif
|
||||
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
|
||||
GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels));
|
||||
|
||||
// Store our identifier
|
||||
io.Fonts->SetTexID((ImTextureID)(intptr_t)g_FontTexture);
|
||||
io.Fonts->SetTexID((ImTextureID)(intptr_t)bd->FontTexture);
|
||||
|
||||
// Restore state
|
||||
glBindTexture(GL_TEXTURE_2D, last_texture);
|
||||
GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture));
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void ImGui_ImplOpenGL3_DestroyFontsTexture()
|
||||
{
|
||||
if (g_FontTexture)
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
if (bd->FontTexture)
|
||||
{
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
glDeleteTextures(1, &g_FontTexture);
|
||||
glDeleteTextures(1, &bd->FontTexture);
|
||||
io.Fonts->SetTexID(0);
|
||||
g_FontTexture = 0;
|
||||
bd->FontTexture = 0;
|
||||
}
|
||||
}
|
||||
|
||||
// If you get an error please report on github. You may try different GL context version or GLSL version. See GL<>GLSL version table at the top of this file.
|
||||
static bool CheckShader(GLuint handle, const char* desc)
|
||||
{
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
GLint status = 0, log_length = 0;
|
||||
glGetShaderiv(handle, GL_COMPILE_STATUS, &status);
|
||||
glGetShaderiv(handle, GL_INFO_LOG_LENGTH, &log_length);
|
||||
if ((GLboolean)status == GL_FALSE)
|
||||
fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to compile %s!\n", desc);
|
||||
fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to compile %s! With GLSL: %s\n", desc, bd->GlslVersionString);
|
||||
if (log_length > 1)
|
||||
{
|
||||
ImVector<char> buf;
|
||||
buf.resize((int)(log_length + 1));
|
||||
glGetShaderInfoLog(handle, log_length, NULL, (GLchar*)buf.begin());
|
||||
glGetShaderInfoLog(handle, log_length, nullptr, (GLchar*)buf.begin());
|
||||
fprintf(stderr, "%s\n", buf.begin());
|
||||
}
|
||||
return (GLboolean)status == GL_TRUE;
|
||||
|
|
@ -511,16 +734,17 @@ static bool CheckShader(GLuint handle, const char* desc)
|
|||
// If you get an error please report on GitHub. You may try different GL context version or GLSL version.
|
||||
static bool CheckProgram(GLuint handle, const char* desc)
|
||||
{
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
GLint status = 0, log_length = 0;
|
||||
glGetProgramiv(handle, GL_LINK_STATUS, &status);
|
||||
glGetProgramiv(handle, GL_INFO_LOG_LENGTH, &log_length);
|
||||
if ((GLboolean)status == GL_FALSE)
|
||||
fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to link %s! (with GLSL '%s')\n", desc, g_GlslVersionString);
|
||||
fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to link %s! With GLSL %s\n", desc, bd->GlslVersionString);
|
||||
if (log_length > 1)
|
||||
{
|
||||
ImVector<char> buf;
|
||||
buf.resize((int)(log_length + 1));
|
||||
glGetProgramInfoLog(handle, log_length, NULL, (GLchar*)buf.begin());
|
||||
glGetProgramInfoLog(handle, log_length, nullptr, (GLchar*)buf.begin());
|
||||
fprintf(stderr, "%s\n", buf.begin());
|
||||
}
|
||||
return (GLboolean)status == GL_TRUE;
|
||||
|
|
@ -528,18 +752,20 @@ static bool CheckProgram(GLuint handle, const char* desc)
|
|||
|
||||
bool ImGui_ImplOpenGL3_CreateDeviceObjects()
|
||||
{
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
|
||||
// Backup GL state
|
||||
GLint last_texture, last_array_buffer;
|
||||
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
|
||||
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
|
||||
#ifndef IMGUI_IMPL_OPENGL_ES2
|
||||
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
GLint last_vertex_array;
|
||||
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
|
||||
#endif
|
||||
|
||||
// Parse GLSL version string
|
||||
int glsl_version = 130;
|
||||
sscanf(g_GlslVersionString, "#version %d", &glsl_version);
|
||||
sscanf(bd->GlslVersionString, "#version %d", &glsl_version);
|
||||
|
||||
const GLchar* vertex_shader_glsl_120 =
|
||||
"uniform mat4 ProjMtx;\n"
|
||||
|
|
@ -570,7 +796,7 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
|
|||
"}\n";
|
||||
|
||||
const GLchar* vertex_shader_glsl_300_es =
|
||||
"precision mediump float;\n"
|
||||
"precision highp float;\n"
|
||||
"layout (location = 0) in vec2 Position;\n"
|
||||
"layout (location = 1) in vec2 UV;\n"
|
||||
"layout (location = 2) in vec4 Color;\n"
|
||||
|
|
@ -642,8 +868,8 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
|
|||
"}\n";
|
||||
|
||||
// Select shaders matching our GLSL versions
|
||||
const GLchar* vertex_shader = NULL;
|
||||
const GLchar* fragment_shader = NULL;
|
||||
const GLchar* vertex_shader = nullptr;
|
||||
const GLchar* fragment_shader = nullptr;
|
||||
if (glsl_version < 130)
|
||||
{
|
||||
vertex_shader = vertex_shader_glsl_120;
|
||||
|
|
@ -666,40 +892,46 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
|
|||
}
|
||||
|
||||
// Create shaders
|
||||
const GLchar* vertex_shader_with_version[2] = { g_GlslVersionString, vertex_shader };
|
||||
g_VertHandle = glCreateShader(GL_VERTEX_SHADER);
|
||||
glShaderSource(g_VertHandle, 2, vertex_shader_with_version, NULL);
|
||||
glCompileShader(g_VertHandle);
|
||||
CheckShader(g_VertHandle, "vertex shader");
|
||||
const GLchar* vertex_shader_with_version[2] = { bd->GlslVersionString, vertex_shader };
|
||||
GLuint vert_handle = glCreateShader(GL_VERTEX_SHADER);
|
||||
glShaderSource(vert_handle, 2, vertex_shader_with_version, nullptr);
|
||||
glCompileShader(vert_handle);
|
||||
CheckShader(vert_handle, "vertex shader");
|
||||
|
||||
const GLchar* fragment_shader_with_version[2] = { g_GlslVersionString, fragment_shader };
|
||||
g_FragHandle = glCreateShader(GL_FRAGMENT_SHADER);
|
||||
glShaderSource(g_FragHandle, 2, fragment_shader_with_version, NULL);
|
||||
glCompileShader(g_FragHandle);
|
||||
CheckShader(g_FragHandle, "fragment shader");
|
||||
const GLchar* fragment_shader_with_version[2] = { bd->GlslVersionString, fragment_shader };
|
||||
GLuint frag_handle = glCreateShader(GL_FRAGMENT_SHADER);
|
||||
glShaderSource(frag_handle, 2, fragment_shader_with_version, nullptr);
|
||||
glCompileShader(frag_handle);
|
||||
CheckShader(frag_handle, "fragment shader");
|
||||
|
||||
g_ShaderHandle = glCreateProgram();
|
||||
glAttachShader(g_ShaderHandle, g_VertHandle);
|
||||
glAttachShader(g_ShaderHandle, g_FragHandle);
|
||||
glLinkProgram(g_ShaderHandle);
|
||||
CheckProgram(g_ShaderHandle, "shader program");
|
||||
// Link
|
||||
bd->ShaderHandle = glCreateProgram();
|
||||
glAttachShader(bd->ShaderHandle, vert_handle);
|
||||
glAttachShader(bd->ShaderHandle, frag_handle);
|
||||
glLinkProgram(bd->ShaderHandle);
|
||||
CheckProgram(bd->ShaderHandle, "shader program");
|
||||
|
||||
g_AttribLocationTex = glGetUniformLocation(g_ShaderHandle, "Texture");
|
||||
g_AttribLocationProjMtx = glGetUniformLocation(g_ShaderHandle, "ProjMtx");
|
||||
g_AttribLocationVtxPos = (GLuint)glGetAttribLocation(g_ShaderHandle, "Position");
|
||||
g_AttribLocationVtxUV = (GLuint)glGetAttribLocation(g_ShaderHandle, "UV");
|
||||
g_AttribLocationVtxColor = (GLuint)glGetAttribLocation(g_ShaderHandle, "Color");
|
||||
glDetachShader(bd->ShaderHandle, vert_handle);
|
||||
glDetachShader(bd->ShaderHandle, frag_handle);
|
||||
glDeleteShader(vert_handle);
|
||||
glDeleteShader(frag_handle);
|
||||
|
||||
bd->AttribLocationTex = glGetUniformLocation(bd->ShaderHandle, "Texture");
|
||||
bd->AttribLocationProjMtx = glGetUniformLocation(bd->ShaderHandle, "ProjMtx");
|
||||
bd->AttribLocationVtxPos = (GLuint)glGetAttribLocation(bd->ShaderHandle, "Position");
|
||||
bd->AttribLocationVtxUV = (GLuint)glGetAttribLocation(bd->ShaderHandle, "UV");
|
||||
bd->AttribLocationVtxColor = (GLuint)glGetAttribLocation(bd->ShaderHandle, "Color");
|
||||
|
||||
// Create buffers
|
||||
glGenBuffers(1, &g_VboHandle);
|
||||
glGenBuffers(1, &g_ElementsHandle);
|
||||
glGenBuffers(1, &bd->VboHandle);
|
||||
glGenBuffers(1, &bd->ElementsHandle);
|
||||
|
||||
ImGui_ImplOpenGL3_CreateFontsTexture();
|
||||
|
||||
// Restore modified GL state
|
||||
glBindTexture(GL_TEXTURE_2D, last_texture);
|
||||
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
|
||||
#ifndef IMGUI_IMPL_OPENGL_ES2
|
||||
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
glBindVertexArray(last_vertex_array);
|
||||
#endif
|
||||
|
||||
|
|
@ -708,13 +940,48 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
|
|||
|
||||
void ImGui_ImplOpenGL3_DestroyDeviceObjects()
|
||||
{
|
||||
if (g_VboHandle) { glDeleteBuffers(1, &g_VboHandle); g_VboHandle = 0; }
|
||||
if (g_ElementsHandle) { glDeleteBuffers(1, &g_ElementsHandle); g_ElementsHandle = 0; }
|
||||
if (g_ShaderHandle && g_VertHandle) { glDetachShader(g_ShaderHandle, g_VertHandle); }
|
||||
if (g_ShaderHandle && g_FragHandle) { glDetachShader(g_ShaderHandle, g_FragHandle); }
|
||||
if (g_VertHandle) { glDeleteShader(g_VertHandle); g_VertHandle = 0; }
|
||||
if (g_FragHandle) { glDeleteShader(g_FragHandle); g_FragHandle = 0; }
|
||||
if (g_ShaderHandle) { glDeleteProgram(g_ShaderHandle); g_ShaderHandle = 0; }
|
||||
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
if (bd->VboHandle) { glDeleteBuffers(1, &bd->VboHandle); bd->VboHandle = 0; }
|
||||
if (bd->ElementsHandle) { glDeleteBuffers(1, &bd->ElementsHandle); bd->ElementsHandle = 0; }
|
||||
if (bd->ShaderHandle) { glDeleteProgram(bd->ShaderHandle); bd->ShaderHandle = 0; }
|
||||
ImGui_ImplOpenGL3_DestroyFontsTexture();
|
||||
}
|
||||
|
||||
//--------------------------------------------------------------------------------------------------------
|
||||
// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
|
||||
// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
|
||||
// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first..
|
||||
//--------------------------------------------------------------------------------------------------------
|
||||
|
||||
static void ImGui_ImplOpenGL3_RenderWindow(ImGuiViewport* viewport, void*)
|
||||
{
|
||||
if (!(viewport->Flags & ImGuiViewportFlags_NoRendererClear))
|
||||
{
|
||||
ImVec4 clear_color = ImVec4(0.0f, 0.0f, 0.0f, 1.0f);
|
||||
glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
}
|
||||
ImGui_ImplOpenGL3_RenderDrawData(viewport->DrawData);
|
||||
}
|
||||
|
||||
static void ImGui_ImplOpenGL3_InitPlatformInterface()
|
||||
{
|
||||
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
|
||||
platform_io.Renderer_RenderWindow = ImGui_ImplOpenGL3_RenderWindow;
|
||||
}
|
||||
|
||||
static void ImGui_ImplOpenGL3_ShutdownPlatformInterface()
|
||||
{
|
||||
ImGui::DestroyPlatformWindows();
|
||||
}
|
||||
|
||||
//-----------------------------------------------------------------------------
|
||||
|
||||
#if defined(__GNUC__)
|
||||
#pragma GCC diagnostic pop
|
||||
#endif
|
||||
#if defined(__clang__)
|
||||
#pragma clang diagnostic pop
|
||||
#endif
|
||||
|
||||
#endif // #ifndef IMGUI_DISABLE
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue