mirror of
https://github.com/wpilibsuite/allwpilib
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[upstream_utils] Update imgui and implot (#8762)
Not updating GLFW yet due to a likely future move to SDL.
This commit is contained in:
Peter Johnson
@@ -4,8 +4,9 @@
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// This needs to be used along with a Platform Backend (e.g. GLFW, SDL, Win32, custom..)
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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: Large meshes support (64k+ vertices) with 16-bit indices (Desktop OpenGL only).
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// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
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// [x] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset) [Desktop OpenGL only!]
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// [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
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// [X] Renderer: Multi-viewport support (multiple windows). Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'.
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// About WebGL/ES:
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@@ -23,12 +24,27 @@
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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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// 2026-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
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// 2026-03-12: OpenGL: Fixed invalid assert in ImGui_ImplOpenGL3_UpdateTexture() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295)
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// 2025-12-11: OpenGL: Fixed embedded loader multiple init/shutdown cycles broken on some platforms. (#8792, #9112)
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// 2025-09-18: Call platform_io.ClearRendererHandlers() on shutdown.
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// 2025-07-22: OpenGL: Add and call embedded loader shutdown during ImGui_ImplOpenGL3_Shutdown() to facilitate multiple init/shutdown cycles in same process. (#8792)
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// 2025-07-15: OpenGL: Set GL_UNPACK_ALIGNMENT to 1 before updating textures (#8802) + restore non-WebGL/ES update path that doesn't require a CPU-side copy.
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// 2025-06-11: OpenGL: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. Removed ImGui_ImplOpenGL3_CreateFontsTexture() and ImGui_ImplOpenGL3_DestroyFontsTexture().
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// 2025-06-04: OpenGL: Made GLES 3.20 contexts not access GL_CONTEXT_PROFILE_MASK nor GL_PRIMITIVE_RESTART. (#8664)
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// 2025-02-18: OpenGL: Lazily reinitialize embedded GL loader for when calling backend from e.g. other DLL boundaries. (#8406)
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// 2024-10-07: OpenGL: Changed default texture sampler to Clamp instead of Repeat/Wrap.
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// 2024-06-28: OpenGL: ImGui_ImplOpenGL3_NewFrame() recreates font texture if it has been destroyed by ImGui_ImplOpenGL3_DestroyFontsTexture(). (#7748)
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// 2024-05-07: OpenGL: Update loader for Linux to support EGL/GLVND. (#7562)
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// 2024-04-16: OpenGL: Detect ES3 contexts on desktop based on version string, to e.g. avoid calling glPolygonMode() on them. (#7447)
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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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// 2023-03-15: OpenGL: Fixed GL loader crash when GL_VERSION returns nullptr. (#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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@@ -48,7 +64,7 @@
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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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// 2020-10-15: OpenGL: Use glGetString(GL_VERSION) instead of glGetIntegerv(GL_MAJOR_VERSION, ...) when the later returns zero (e.g. Desktop GL 2.x)
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// 2020-09-17: OpenGL: Fix to avoid compiling/calling glBindSampler() on ES or pre 3.3 context which have the defines set by a loader.
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// 2020-09-17: OpenGL: Fix to avoid compiling/calling glBindSampler() on ES or pre-3.3 context which have the defines set by a loader.
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// 2020-07-10: OpenGL: Added support for glad2 OpenGL loader.
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// 2020-05-08: OpenGL: Made default GLSL version 150 (instead of 130) on OSX.
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// 2020-04-21: OpenGL: Fixed handling of glClipControl(GL_UPPER_LEFT) by inverting projection matrix.
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@@ -120,6 +136,7 @@
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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 "-Wunknown-warning-option" // warning: ignore unknown flags
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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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@@ -131,6 +148,7 @@
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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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#pragma GCC diagnostic ignored "-Wstrict-overflow" // warning: assuming signed overflow does not occur when simplifying division / ..when changing X +- C1 cmp C2 to X cmp C2 -+ C1
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#endif
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// GL includes
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@@ -158,9 +176,11 @@
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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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// Typically you would run: python3 ./gl3w_gen.py --output ../imgui/backends/imgui_impl_opengl3_loader.h --ref ../imgui/backends/imgui_impl_opengl3.cpp ./extra_symbols.txt
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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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#define IMGUI_IMPL_OPENGL_LOADER_IMGL3W
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#include "imgui_impl_opengl3_loader.h"
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#endif
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@@ -175,9 +195,21 @@
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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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// Desktop GL 2.0+ has extension and glPolygonMode() which GL ES and WebGL don't have..
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// A desktop ES context can technically compile fine with our loader, so we also perform a runtime checks
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#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3)
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#define IMGUI_IMPL_OPENGL_HAS_EXTENSIONS // has glGetIntegerv(GL_NUM_EXTENSIONS)
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#define IMGUI_IMPL_OPENGL_MAY_HAVE_POLYGON_MODE // may have glPolygonMode()
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#endif
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// Desktop GL 2.1+ and GL ES 3.0+ have glBindBuffer() with GL_PIXEL_UNPACK_BUFFER target.
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#if !defined(IMGUI_IMPL_OPENGL_ES2)
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#define IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_BUFFER_PIXEL_UNPACK
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#endif
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// Desktop GL 3.1+ has GL_PRIMITIVE_RESTART state
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#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && defined(GL_VERSION_3_1)
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#define IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
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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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@@ -190,16 +222,6 @@
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#define IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
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#endif
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// Desktop GL 3.1+ has GL_PRIMITIVE_RESTART state
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#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3) && defined(GL_VERSION_3_1)
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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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@@ -218,7 +240,7 @@ struct ImGui_ImplOpenGL3_Data
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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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GLint MaxTextureSize;
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GLuint ShaderHandle;
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GLint AttribLocationTex; // Uniforms location
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GLint AttribLocationProjMtx;
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@@ -228,8 +250,11 @@ struct ImGui_ImplOpenGL3_Data
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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 HasPolygonMode;
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bool HasBindSampler;
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bool HasClipOrigin;
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bool UseBufferSubData;
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ImVector<char> TempBuffer;
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ImGui_ImplOpenGL3_Data() { memset((void*)this, 0, sizeof(*this)); }
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};
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@@ -242,8 +267,8 @@ static ImGui_ImplOpenGL3_Data* ImGui_ImplOpenGL3_GetBackendData()
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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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static void ImGui_ImplOpenGL3_InitMultiViewportSupport();
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static void ImGui_ImplOpenGL3_ShutdownMultiViewportSupport();
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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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@@ -269,20 +294,39 @@ struct ImGui_ImplOpenGL3_VtxAttribState
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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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// Not static to allow third-party code to use that if they want to (but undocumented)
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bool ImGui_ImplOpenGL3_InitLoader();
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bool ImGui_ImplOpenGL3_InitLoader()
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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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// Lazily initialize our loader if not already done
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// (to facilitate handling multiple DLL boundaries and multiple context shutdowns we call this from all main entry points)
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#ifdef IMGUI_IMPL_OPENGL_LOADER_IMGL3W
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if (glGetIntegerv == nullptr && 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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return true;
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}
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static void ImGui_ImplOpenGL3_ShutdownLoader()
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{
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#ifdef IMGUI_IMPL_OPENGL_LOADER_IMGL3W
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imgl3wShutdown();
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#endif
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}
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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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IMGUI_CHECKVERSION();
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IM_ASSERT(io.BackendRendererUserData == nullptr && "Already initialized a renderer backend!");
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// Initialize loader
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if (!ImGui_ImplOpenGL3_InitLoader())
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return false;
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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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@@ -290,10 +334,12 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
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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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const char* gl_version_str = (const char*)glGetString(GL_VERSION);
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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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IM_UNUSED(gl_version_str);
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#else
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// Desktop or GLES 3
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GLint major = 0;
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@@ -301,20 +347,21 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
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glGetIntegerv(GL_MAJOR_VERSION, &major);
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glGetIntegerv(GL_MINOR_VERSION, &minor);
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if (major == 0 && minor == 0)
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{
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// Query GL_VERSION in desktop GL 2.x, the string will start with "<major>.<minor>"
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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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sscanf(gl_version_str, "%d.%d", &major, &minor); // Query GL_VERSION in desktop GL 2.x, the string will start with "<major>.<minor>"
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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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glGetIntegerv(GL_MAX_TEXTURE_SIZE, &bd->MaxTextureSize);
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#if defined(IMGUI_IMPL_OPENGL_ES3)
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bd->GlProfileIsES3 = true;
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#else
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if (strncmp(gl_version_str, "OpenGL ES 3", 11) == 0)
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bd->GlProfileIsES3 = true;
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#endif
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#if defined(GL_CONTEXT_PROFILE_MASK)
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if (!bd->GlProfileIsES3 && 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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bd->UseBufferSubData = false;
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@@ -329,14 +376,18 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
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#endif
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#ifdef IMGUI_IMPL_OPENGL_DEBUG
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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]
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printf("GlVersion = %d, \"%s\"\nGlProfileIsCompat = %d\nGlProfileMask = 0x%X\nGlProfileIsES2/IsEs3 = %d/%d\nGL_VENDOR = '%s'\nGL_RENDERER = '%s'\n", bd->GlVersion, gl_version_str, bd->GlProfileIsCompat, bd->GlProfileMask, bd->GlProfileIsES2, bd->GlProfileIsES3, (const char*)glGetString(GL_VENDOR), (const char*)glGetString(GL_RENDERER)); // [DEBUG]
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#endif
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#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET
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if (bd->GlVersion >= 320)
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io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
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#endif
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io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports; // We can create multi-viewports on the Renderer side (optional)
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io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures; // We can honor ImGuiPlatformIO::Textures[] requests during render.
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io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports; // We can create multi-viewports on the Renderer side (optional)
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ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
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platform_io.Renderer_TextureMaxWidth = platform_io.Renderer_TextureMaxHeight = (int)bd->MaxTextureSize;
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// Store GLSL version string so we can refer to it later in case we recreate shaders.
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// Note: GLSL version is NOT the same as GL version. Leave this to nullptr if unsure.
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@@ -352,7 +403,7 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
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glsl_version = "#version 130";
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#endif
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}
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IM_ASSERT((int)strlen(glsl_version) + 2 < IM_ARRAYSIZE(bd->GlslVersionString));
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IM_ASSERT((int)strlen(glsl_version) + 2 < IM_COUNTOF(bd->GlslVersionString));
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strcpy(bd->GlslVersionString, glsl_version);
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strcat(bd->GlslVersionString, "\n");
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@@ -362,8 +413,14 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
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glGetIntegerv(GL_TEXTURE_BINDING_2D, ¤t_texture);
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// Detect extensions we support
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#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_POLYGON_MODE
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bd->HasPolygonMode = (!bd->GlProfileIsES2 && !bd->GlProfileIsES3);
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#endif
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#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
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bd->HasBindSampler = (bd->GlVersion >= 330 || bd->GlProfileIsES3);
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#endif
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bd->HasClipOrigin = (bd->GlVersion >= 450);
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#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_EXTENSIONS
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#ifdef IMGUI_IMPL_OPENGL_HAS_EXTENSIONS
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GLint num_extensions = 0;
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glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
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for (GLint i = 0; i < num_extensions; i++)
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@@ -374,8 +431,7 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
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}
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#endif
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if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
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ImGui_ImplOpenGL3_InitPlatformInterface();
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ImGui_ImplOpenGL3_InitMultiViewportSupport();
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return true;
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}
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@@ -385,22 +441,29 @@ void ImGui_ImplOpenGL3_Shutdown()
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ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
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IM_ASSERT(bd != nullptr && "No renderer backend to shutdown, or already shutdown?");
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ImGuiIO& io = ImGui::GetIO();
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ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
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ImGui_ImplOpenGL3_ShutdownPlatformInterface();
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ImGui_ImplOpenGL3_ShutdownMultiViewportSupport();
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ImGui_ImplOpenGL3_DestroyDeviceObjects();
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io.BackendRendererName = nullptr;
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io.BackendRendererUserData = nullptr;
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io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasViewports);
|
||||
io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures | ImGuiBackendFlags_RendererHasViewports);
|
||||
platform_io.ClearRendererHandlers();
|
||||
IM_DELETE(bd);
|
||||
|
||||
ImGui_ImplOpenGL3_ShutdownLoader();
|
||||
}
|
||||
|
||||
void ImGui_ImplOpenGL3_NewFrame()
|
||||
{
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
IM_ASSERT(bd != nullptr && "Did you call ImGui_ImplOpenGL3_Init()?");
|
||||
IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplOpenGL3_Init()?");
|
||||
|
||||
ImGui_ImplOpenGL3_InitLoader();
|
||||
if (!bd->ShaderHandle)
|
||||
ImGui_ImplOpenGL3_CreateDeviceObjects();
|
||||
if (!ImGui_ImplOpenGL3_CreateDeviceObjects())
|
||||
IM_ASSERT(0 && "ImGui_ImplOpenGL3_CreateDeviceObjects() failed!");
|
||||
}
|
||||
|
||||
static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_width, int fb_height, GLuint vertex_array_object)
|
||||
@@ -416,11 +479,12 @@ 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 (bd->GlVersion >= 310)
|
||||
if (!bd->GlProfileIsES3 && bd->GlVersion >= 310)
|
||||
glDisable(GL_PRIMITIVE_RESTART);
|
||||
#endif
|
||||
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
|
||||
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_POLYGON_MODE
|
||||
if (bd->HasPolygonMode)
|
||||
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
|
||||
#endif
|
||||
|
||||
// Support for GL 4.5 rarely used glClipControl(GL_UPPER_LEFT)
|
||||
@@ -456,7 +520,7 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_wid
|
||||
glUniformMatrix4fv(bd->AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
|
||||
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_SAMPLER
|
||||
if (bd->GlVersion >= 330 || bd->GlProfileIsES3)
|
||||
if (bd->HasBindSampler)
|
||||
glBindSampler(0, 0); // We use combined texture/sampler state. Applications using GL 3.3 and GL ES 3.0 may set that otherwise.
|
||||
#endif
|
||||
|
||||
@@ -471,9 +535,9 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_wid
|
||||
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*)IM_OFFSETOF(ImDrawVert, pos)));
|
||||
GL_CALL(glVertexAttribPointer(bd->AttribLocationVtxUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, uv)));
|
||||
GL_CALL(glVertexAttribPointer(bd->AttribLocationVtxColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, col)));
|
||||
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.
|
||||
@@ -487,15 +551,24 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
||||
if (fb_width <= 0 || fb_height <= 0)
|
||||
return;
|
||||
|
||||
ImGui_ImplOpenGL3_InitLoader();
|
||||
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
|
||||
// Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
|
||||
// (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
|
||||
if (draw_data->Textures != nullptr)
|
||||
for (ImTextureData* tex : *draw_data->Textures)
|
||||
if (tex->Status != ImTextureStatus_OK)
|
||||
ImGui_ImplOpenGL3_UpdateTexture(tex);
|
||||
|
||||
// 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 (bd->GlVersion >= 330 || bd->GlProfileIsES3) { glGetIntegerv(GL_SAMPLER_BINDING, (GLint*)&last_sampler); } else { last_sampler = 0; }
|
||||
GLuint last_sampler; if (bd->HasBindSampler) { 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_USE_VERTEX_ARRAY
|
||||
@@ -508,8 +581,8 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
||||
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
GLuint last_vertex_array_object; glGetIntegerv(GL_VERTEX_ARRAY_BINDING, (GLint*)&last_vertex_array_object);
|
||||
#endif
|
||||
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
|
||||
GLint last_polygon_mode[2]; glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode);
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_POLYGON_MODE
|
||||
GLint last_polygon_mode[2]; if (bd->HasPolygonMode) { glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode); }
|
||||
#endif
|
||||
GLint last_viewport[4]; glGetIntegerv(GL_VIEWPORT, last_viewport);
|
||||
GLint last_scissor_box[4]; glGetIntegerv(GL_SCISSOR_BOX, last_scissor_box);
|
||||
@@ -525,7 +598,7 @@ 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 = (bd->GlVersion >= 310) ? glIsEnabled(GL_PRIMITIVE_RESTART) : GL_FALSE;
|
||||
GLboolean last_enable_primitive_restart = (!bd->GlProfileIsES3 && bd->GlVersion >= 310) ? glIsEnabled(GL_PRIMITIVE_RESTART) : GL_FALSE;
|
||||
#endif
|
||||
|
||||
// Setup desired GL state
|
||||
@@ -542,10 +615,8 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
||||
ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
|
||||
|
||||
// Render command lists
|
||||
for (int n = 0; n < draw_data->CmdListsCount; n++)
|
||||
for (const ImDrawList* draw_list : draw_data->CmdLists)
|
||||
{
|
||||
const ImDrawList* cmd_list = draw_data->CmdLists[n];
|
||||
|
||||
// Upload vertex/index buffers
|
||||
// - OpenGL drivers are in a very sorry state nowadays....
|
||||
// During 2021 we attempted to switch from glBufferData() to orphaning+glBufferSubData() following reports
|
||||
@@ -554,8 +625,8 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
||||
// - 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);
|
||||
const GLsizeiptr vtx_buffer_size = (GLsizeiptr)draw_list->VtxBuffer.Size * (int)sizeof(ImDrawVert);
|
||||
const GLsizeiptr idx_buffer_size = (GLsizeiptr)draw_list->IdxBuffer.Size * (int)sizeof(ImDrawIdx);
|
||||
if (bd->UseBufferSubData)
|
||||
{
|
||||
if (bd->VertexBufferSize < vtx_buffer_size)
|
||||
@@ -568,18 +639,18 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
||||
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));
|
||||
GL_CALL(glBufferSubData(GL_ARRAY_BUFFER, 0, vtx_buffer_size, (const GLvoid*)draw_list->VtxBuffer.Data));
|
||||
GL_CALL(glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, idx_buffer_size, (const GLvoid*)draw_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));
|
||||
GL_CALL(glBufferData(GL_ARRAY_BUFFER, vtx_buffer_size, (const GLvoid*)draw_list->VtxBuffer.Data, GL_STREAM_DRAW));
|
||||
GL_CALL(glBufferData(GL_ELEMENT_ARRAY_BUFFER, idx_buffer_size, (const GLvoid*)draw_list->IdxBuffer.Data, GL_STREAM_DRAW));
|
||||
}
|
||||
|
||||
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
|
||||
for (int cmd_i = 0; cmd_i < draw_list->CmdBuffer.Size; cmd_i++)
|
||||
{
|
||||
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
|
||||
const ImDrawCmd* pcmd = &draw_list->CmdBuffer[cmd_i];
|
||||
if (pcmd->UserCallback != nullptr)
|
||||
{
|
||||
// User callback, registered via ImDrawList::AddCallback()
|
||||
@@ -587,7 +658,7 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
||||
if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
|
||||
ImGui_ImplOpenGL3_SetupRenderState(draw_data, fb_width, fb_height, vertex_array_object);
|
||||
else
|
||||
pcmd->UserCallback(cmd_list, pcmd);
|
||||
pcmd->UserCallback(draw_list, pcmd);
|
||||
}
|
||||
else
|
||||
{
|
||||
@@ -622,7 +693,7 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
|
||||
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 (bd->GlVersion >= 330 || bd->GlProfileIsES3)
|
||||
if (bd->HasBindSampler)
|
||||
glBindSampler(0, last_sampler);
|
||||
#endif
|
||||
glActiveTexture(last_active_texture);
|
||||
@@ -644,69 +715,103 @@ 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 (bd->GlVersion >= 310) { if (last_enable_primitive_restart) glEnable(GL_PRIMITIVE_RESTART); else glDisable(GL_PRIMITIVE_RESTART); }
|
||||
if (!bd->GlProfileIsES3 && bd->GlVersion >= 310) { if (last_enable_primitive_restart) glEnable(GL_PRIMITIVE_RESTART); else glDisable(GL_PRIMITIVE_RESTART); }
|
||||
#endif
|
||||
|
||||
#ifdef IMGUI_IMPL_HAS_POLYGON_MODE
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_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
|
||||
if (bd->HasPolygonMode) { 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_OPENGL_MAY_HAVE_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()
|
||||
static void ImGui_ImplOpenGL3_DestroyTexture(ImTextureData* tex)
|
||||
{
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
GLuint gl_tex_id = (GLuint)(intptr_t)tex->TexID;
|
||||
glDeleteTextures(1, &gl_tex_id);
|
||||
|
||||
// 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;
|
||||
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
|
||||
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)bd->FontTexture);
|
||||
|
||||
// Restore state
|
||||
GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture));
|
||||
|
||||
return true;
|
||||
// Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
|
||||
tex->SetTexID(ImTextureID_Invalid);
|
||||
tex->SetStatus(ImTextureStatus_Destroyed);
|
||||
}
|
||||
|
||||
void ImGui_ImplOpenGL3_DestroyFontsTexture()
|
||||
void ImGui_ImplOpenGL3_UpdateTexture(ImTextureData* tex)
|
||||
{
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
if (bd->FontTexture)
|
||||
// FIXME: Consider backing up and restoring
|
||||
if (tex->Status == ImTextureStatus_WantCreate || tex->Status == ImTextureStatus_WantUpdates)
|
||||
{
|
||||
glDeleteTextures(1, &bd->FontTexture);
|
||||
io.Fonts->SetTexID(0);
|
||||
bd->FontTexture = 0;
|
||||
#ifdef GL_UNPACK_ROW_LENGTH // Not on WebGL/ES
|
||||
GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
|
||||
#endif
|
||||
#ifdef GL_UNPACK_ALIGNMENT
|
||||
GL_CALL(glPixelStorei(GL_UNPACK_ALIGNMENT, 1));
|
||||
#endif
|
||||
}
|
||||
|
||||
if (tex->Status == ImTextureStatus_WantCreate)
|
||||
{
|
||||
// Create and upload new texture to graphics system
|
||||
//IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
|
||||
IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
|
||||
IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
|
||||
const void* pixels = tex->GetPixels();
|
||||
GLuint gl_texture_id = 0;
|
||||
|
||||
// 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;
|
||||
GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
|
||||
GL_CALL(glGenTextures(1, &gl_texture_id));
|
||||
GL_CALL(glBindTexture(GL_TEXTURE_2D, gl_texture_id));
|
||||
GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
|
||||
GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
|
||||
GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
|
||||
GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
|
||||
GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex->Width, tex->Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels));
|
||||
|
||||
// Store identifiers
|
||||
tex->SetTexID((ImTextureID)(intptr_t)gl_texture_id);
|
||||
tex->SetStatus(ImTextureStatus_OK);
|
||||
|
||||
// Restore state
|
||||
GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture));
|
||||
}
|
||||
else if (tex->Status == ImTextureStatus_WantUpdates)
|
||||
{
|
||||
// Update selected blocks. We only ever write to textures regions which have never been used before!
|
||||
// This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
|
||||
GLint last_texture;
|
||||
GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
|
||||
|
||||
GLuint gl_tex_id = (GLuint)(intptr_t)tex->TexID;
|
||||
GL_CALL(glBindTexture(GL_TEXTURE_2D, gl_tex_id));
|
||||
#if GL_UNPACK_ROW_LENGTH // Not on WebGL/ES
|
||||
GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, tex->Width));
|
||||
for (ImTextureRect& r : tex->Updates)
|
||||
GL_CALL(glTexSubImage2D(GL_TEXTURE_2D, 0, r.x, r.y, r.w, r.h, GL_RGBA, GL_UNSIGNED_BYTE, tex->GetPixelsAt(r.x, r.y)));
|
||||
GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
|
||||
#else
|
||||
// GL ES doesn't have GL_UNPACK_ROW_LENGTH, so we need to (A) copy to a contiguous buffer or (B) upload line by line.
|
||||
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
|
||||
for (ImTextureRect& r : tex->Updates)
|
||||
{
|
||||
const int src_pitch = r.w * tex->BytesPerPixel;
|
||||
bd->TempBuffer.resize(r.h * src_pitch);
|
||||
char* out_p = bd->TempBuffer.Data;
|
||||
for (int y = 0; y < r.h; y++, out_p += src_pitch)
|
||||
memcpy(out_p, tex->GetPixelsAt(r.x, r.y + y), src_pitch);
|
||||
IM_ASSERT(out_p == bd->TempBuffer.end());
|
||||
GL_CALL(glTexSubImage2D(GL_TEXTURE_2D, 0, r.x, r.y, r.w, r.h, GL_RGBA, GL_UNSIGNED_BYTE, bd->TempBuffer.Data));
|
||||
}
|
||||
#endif
|
||||
tex->SetStatus(ImTextureStatus_OK);
|
||||
GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture)); // Restore state
|
||||
}
|
||||
else if (tex->Status == ImTextureStatus_WantDestroy && tex->UnusedFrames > 0)
|
||||
ImGui_ImplOpenGL3_DestroyTexture(tex);
|
||||
}
|
||||
|
||||
// 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.
|
||||
@@ -749,12 +854,17 @@ static bool CheckProgram(GLuint handle, const char* desc)
|
||||
|
||||
bool ImGui_ImplOpenGL3_CreateDeviceObjects()
|
||||
{
|
||||
ImGui_ImplOpenGL3_InitLoader();
|
||||
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);
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_BUFFER_PIXEL_UNPACK
|
||||
GLint last_pixel_unpack_buffer = 0;
|
||||
if (bd->GlVersion >= 210) { glGetIntegerv(GL_PIXEL_UNPACK_BUFFER_BINDING, &last_pixel_unpack_buffer); glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0); }
|
||||
#endif
|
||||
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
GLint last_vertex_array;
|
||||
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
|
||||
@@ -890,23 +1000,28 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
|
||||
|
||||
// Create shaders
|
||||
const GLchar* vertex_shader_with_version[2] = { bd->GlslVersionString, vertex_shader };
|
||||
GLuint vert_handle = glCreateShader(GL_VERTEX_SHADER);
|
||||
GLuint vert_handle;
|
||||
GL_CALL(vert_handle = glCreateShader(GL_VERTEX_SHADER));
|
||||
glShaderSource(vert_handle, 2, vertex_shader_with_version, nullptr);
|
||||
glCompileShader(vert_handle);
|
||||
CheckShader(vert_handle, "vertex shader");
|
||||
if (!CheckShader(vert_handle, "vertex shader"))
|
||||
return false;
|
||||
|
||||
const GLchar* fragment_shader_with_version[2] = { bd->GlslVersionString, fragment_shader };
|
||||
GLuint frag_handle = glCreateShader(GL_FRAGMENT_SHADER);
|
||||
GLuint frag_handle;
|
||||
GL_CALL(frag_handle = glCreateShader(GL_FRAGMENT_SHADER));
|
||||
glShaderSource(frag_handle, 2, fragment_shader_with_version, nullptr);
|
||||
glCompileShader(frag_handle);
|
||||
CheckShader(frag_handle, "fragment shader");
|
||||
if (!CheckShader(frag_handle, "fragment shader"))
|
||||
return false;
|
||||
|
||||
// Link
|
||||
bd->ShaderHandle = glCreateProgram();
|
||||
glAttachShader(bd->ShaderHandle, vert_handle);
|
||||
glAttachShader(bd->ShaderHandle, frag_handle);
|
||||
glLinkProgram(bd->ShaderHandle);
|
||||
CheckProgram(bd->ShaderHandle, "shader program");
|
||||
if (!CheckProgram(bd->ShaderHandle, "shader program"))
|
||||
return false;
|
||||
|
||||
glDetachShader(bd->ShaderHandle, vert_handle);
|
||||
glDetachShader(bd->ShaderHandle, frag_handle);
|
||||
@@ -923,11 +1038,12 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
|
||||
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);
|
||||
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_BIND_BUFFER_PIXEL_UNPACK
|
||||
if (bd->GlVersion >= 210) { glBindBuffer(GL_PIXEL_UNPACK_BUFFER, last_pixel_unpack_buffer); }
|
||||
#endif
|
||||
#ifdef IMGUI_IMPL_OPENGL_USE_VERTEX_ARRAY
|
||||
glBindVertexArray(last_vertex_array);
|
||||
#endif
|
||||
@@ -937,11 +1053,16 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
|
||||
|
||||
void ImGui_ImplOpenGL3_DestroyDeviceObjects()
|
||||
{
|
||||
ImGui_ImplOpenGL3_InitLoader();
|
||||
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();
|
||||
|
||||
// Destroy all textures
|
||||
for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
|
||||
if (tex->RefCount == 1)
|
||||
ImGui_ImplOpenGL3_DestroyTexture(tex);
|
||||
}
|
||||
|
||||
//--------------------------------------------------------------------------------------------------------
|
||||
@@ -961,13 +1082,13 @@ static void ImGui_ImplOpenGL3_RenderWindow(ImGuiViewport* viewport, void*)
|
||||
ImGui_ImplOpenGL3_RenderDrawData(viewport->DrawData);
|
||||
}
|
||||
|
||||
static void ImGui_ImplOpenGL3_InitPlatformInterface()
|
||||
static void ImGui_ImplOpenGL3_InitMultiViewportSupport()
|
||||
{
|
||||
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
|
||||
platform_io.Renderer_RenderWindow = ImGui_ImplOpenGL3_RenderWindow;
|
||||
}
|
||||
|
||||
static void ImGui_ImplOpenGL3_ShutdownPlatformInterface()
|
||||
static void ImGui_ImplOpenGL3_ShutdownMultiViewportSupport()
|
||||
{
|
||||
ImGui::DestroyPlatformWindows();
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user