mirror of
https://github.com/ocornut/imgui.git
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Merge branch 'master' into docking
# Conflicts: # backends/imgui_impl_dx10.cpp # backends/imgui_impl_dx9.cpp # backends/imgui_impl_glfw.cpp # backends/imgui_impl_metal.mm # backends/imgui_impl_opengl2.cpp # backends/imgui_impl_opengl3.cpp # backends/imgui_impl_vulkan.cpp # imgui.cpp
This commit is contained in:
ocornut
@@ -318,143 +318,6 @@ static void ImGui_ImplOpenGL3_ShutdownLoader()
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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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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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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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GLint minor = 0;
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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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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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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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/*
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// Query vendor to enable glBufferSubData kludge
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#ifdef _WIN32
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if (const char* vendor = (const char*)glGetString(GL_VENDOR))
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if (strncmp(vendor, "Intel", 5) == 0)
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bd->UseBufferSubData = true;
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#endif
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*/
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#endif
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#ifdef IMGUI_IMPL_OPENGL_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_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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if (glsl_version == nullptr)
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{
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#if defined(IMGUI_IMPL_OPENGL_ES2)
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glsl_version = "#version 100";
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#elif defined(IMGUI_IMPL_OPENGL_ES3)
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glsl_version = "#version 300 es";
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#elif defined(__APPLE__)
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glsl_version = "#version 150";
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#else
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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_COUNTOF(bd->GlslVersionString));
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strcpy(bd->GlslVersionString, glsl_version);
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strcat(bd->GlslVersionString, "\n");
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// Make an arbitrary GL call (we don't actually need the result)
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// IF YOU GET A CRASH HERE: it probably means the OpenGL function loader didn't do its job. Let us know!
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GLint current_texture;
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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_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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{
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const char* extension = (const char*)glGetStringi(GL_EXTENSIONS, i);
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if (extension != nullptr && strcmp(extension, "GL_ARB_clip_control") == 0)
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bd->HasClipOrigin = true;
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}
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#endif
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ImGui_ImplOpenGL3_InitMultiViewportSupport();
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return true;
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}
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void ImGui_ImplOpenGL3_Shutdown()
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{
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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_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_RendererHasTextures | ImGuiBackendFlags_RendererHasViewports);
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platform_io.ClearRendererHandlers();
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IM_DELETE(bd);
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ImGui_ImplOpenGL3_ShutdownLoader();
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}
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void ImGui_ImplOpenGL3_NewFrame()
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{
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ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
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@@ -1065,6 +928,143 @@ void ImGui_ImplOpenGL3_DestroyDeviceObjects()
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ImGui_ImplOpenGL3_DestroyTexture(tex);
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}
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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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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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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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GLint minor = 0;
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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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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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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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/*
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// Query vendor to enable glBufferSubData kludge
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#ifdef _WIN32
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if (const char* vendor = (const char*)glGetString(GL_VENDOR))
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if (strncmp(vendor, "Intel", 5) == 0)
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bd->UseBufferSubData = true;
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#endif
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*/
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#endif
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#ifdef IMGUI_IMPL_OPENGL_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_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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if (glsl_version == nullptr)
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{
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#if defined(IMGUI_IMPL_OPENGL_ES2)
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glsl_version = "#version 100";
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#elif defined(IMGUI_IMPL_OPENGL_ES3)
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glsl_version = "#version 300 es";
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#elif defined(__APPLE__)
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glsl_version = "#version 150";
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#else
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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_COUNTOF(bd->GlslVersionString));
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strcpy(bd->GlslVersionString, glsl_version);
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strcat(bd->GlslVersionString, "\n");
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// Make an arbitrary GL call (we don't actually need the result)
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// IF YOU GET A CRASH HERE: it probably means the OpenGL function loader didn't do its job. Let us know!
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GLint current_texture;
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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_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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{
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const char* extension = (const char*)glGetStringi(GL_EXTENSIONS, i);
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if (extension != nullptr && strcmp(extension, "GL_ARB_clip_control") == 0)
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bd->HasClipOrigin = true;
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}
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#endif
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ImGui_ImplOpenGL3_InitMultiViewportSupport();
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return true;
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}
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void ImGui_ImplOpenGL3_Shutdown()
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{
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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_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_RendererHasTextures | ImGuiBackendFlags_RendererHasViewports);
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platform_io.ClearRendererHandlers();
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IM_DELETE(bd);
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ImGui_ImplOpenGL3_ShutdownLoader();
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}
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//--------------------------------------------------------------------------------------------------------
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// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT
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// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously.
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