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Backends: Null: added imgui_impl_null platform/renderer backend.

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ocornut 2025-11-17 15:05:43 +01:00
parent 9e15ebb402
commit b885382a63
12 changed files with 392 additions and 12 deletions
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7
examples/README.txt
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@ -1,9 +1,12 @@
See BACKENDS and EXAMPLES files in the docs/ folder, or on the web at: https://github.com/ocornut/imgui/tree/master/docs
New to Dear ImGui?
- Check out the Getting Started guide: https://github.com/ocornut/imgui/wiki/Getting-Started
- About Backends: docs/BACKENDS.md file, or on the web: https://github.com/ocornut/imgui/blob/master/docs/BACKENDS.md
- About Examples: docs/EXAMPLES.md file, or on the web: https://github.com/ocornut/imgui/blob/master/docs/EXAMPLES.md
Backends = Helper code to facilitate integration with platforms/graphics api (used by Examples + should be used by your app).
Examples = Standalone applications showcasing integration with platforms/graphics api.
Some Examples have extra README files in their respective directory, please check them too!
A few Examples have extra README files in their respective directory, please check them too!
Once Dear ImGui is running (in either examples or your own application/game/engine),
run and refer to ImGui::ShowDemoWindow() in imgui_demo.cpp for the end-user API.

2
examples/example_null/build_win32.bat
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@ -1,3 +1,3 @@
@REM Build for Visual Studio compiler. Run your copy of vcvars32.bat or vcvarsall.bat to setup command-line compiler.
mkdir Debug
cl /nologo /Zi /MD /utf-8 /I ..\.. %* *.cpp ..\..\*.cpp /FeDebug/example_null.exe /FoDebug/ /link gdi32.lib shell32.lib imm32.lib
cl /nologo /Zi /MD /utf-8 /I ..\.. %* *.cpp ..\..\*.cpp ..\..\backends\imgui_impl_null.cpp /FeDebug/example_null.exe /FoDebug/ /link gdi32.lib shell32.lib imm32.lib

173
examples/example_null/example_null.vcxproj Normal file
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@ -0,0 +1,173 @@
<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup Label="ProjectConfigurations">
<ProjectConfiguration Include="Debug|Win32">
<Configuration>Debug</Configuration>
<Platform>Win32</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Debug|x64">
<Configuration>Debug</Configuration>
<Platform>x64</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Release|Win32">
<Configuration>Release</Configuration>
<Platform>Win32</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Release|x64">
<Configuration>Release</Configuration>
<Platform>x64</Platform>
</ProjectConfiguration>
</ItemGroup>
<PropertyGroup Label="Globals">
<ProjectGuid>{1A0BF63C-18EF-4BAE-A8DA-055481B11F5D}</ProjectGuid>
<RootNamespace>example_win32_directx11</RootNamespace>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>true</UseDebugLibraries>
<CharacterSet>Unicode</CharacterSet>
<PlatformToolset>v140</PlatformToolset>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>true</UseDebugLibraries>
<CharacterSet>Unicode</CharacterSet>
<PlatformToolset>v140</PlatformToolset>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>Unicode</CharacterSet>
<PlatformToolset>v140</PlatformToolset>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>Unicode</CharacterSet>
<PlatformToolset>v140</PlatformToolset>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
<ImportGroup Label="ExtensionSettings">
</ImportGroup>
<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
</ImportGroup>
<PropertyGroup Label="UserMacros" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<OutDir>$(ProjectDir)$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)$(Configuration)\</IntDir>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
<OutDir>$(ProjectDir)$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)$(Configuration)\</IntDir>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<OutDir>$(ProjectDir)$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)$(Configuration)\</IntDir>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<OutDir>$(ProjectDir)$(Configuration)\</OutDir>
<IntDir>$(ProjectDir)$(Configuration)\</IntDir>
</PropertyGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<ClCompile>
<WarningLevel>Level4</WarningLevel>
<Optimization>Disabled</Optimization>
<AdditionalIncludeDirectories>..\..;..\..\backends;%(AdditionalIncludeDirectories);</AdditionalIncludeDirectories>
<AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalDependencies>d3d11.lib;d3dcompiler.lib;dxgi.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalLibraryDirectories>$(DXSDK_DIR)/Lib/x86;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
<SubSystem>Console</SubSystem>
</Link>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
<ClCompile>
<WarningLevel>Level4</WarningLevel>
<Optimization>Disabled</Optimization>
<AdditionalIncludeDirectories>..\..;..\..\backends;%(AdditionalIncludeDirectories);</AdditionalIncludeDirectories>
<AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalDependencies>d3d11.lib;d3dcompiler.lib;dxgi.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalLibraryDirectories>$(DXSDK_DIR)/Lib/x64;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
<SubSystem>Console</SubSystem>
</Link>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<ClCompile>
<WarningLevel>Level4</WarningLevel>
<Optimization>MaxSpeed</Optimization>
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<AdditionalIncludeDirectories>..\..;..\..\backends;%(AdditionalIncludeDirectories);</AdditionalIncludeDirectories>
<BufferSecurityCheck>false</BufferSecurityCheck>
<AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
</ClCompile>
<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
<OptimizeReferences>true</OptimizeReferences>
<AdditionalDependencies>d3d11.lib;d3dcompiler.lib;dxgi.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalLibraryDirectories>$(DXSDK_DIR)/Lib/x86;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
<SubSystem>Console</SubSystem>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<ClCompile>
<WarningLevel>Level4</WarningLevel>
<Optimization>MaxSpeed</Optimization>
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<AdditionalIncludeDirectories>..\..;..\..\backends;%(AdditionalIncludeDirectories);</AdditionalIncludeDirectories>
<BufferSecurityCheck>false</BufferSecurityCheck>
<AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
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<GenerateDebugInformation>true</GenerateDebugInformation>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
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<AdditionalDependencies>d3d11.lib;d3dcompiler.lib;dxgi.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalLibraryDirectories>$(DXSDK_DIR)/Lib/x64;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
<SubSystem>Console</SubSystem>
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</ItemDefinitionGroup>
<ItemGroup>
<ClInclude Include="..\..\imconfig.h" />
<ClInclude Include="..\..\imgui.h" />
<ClInclude Include="..\..\imgui_internal.h" />
<ClInclude Include="..\..\backends\imgui_impl_null.h" />
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\imgui.cpp" />
<ClCompile Include="..\..\imgui_demo.cpp" />
<ClCompile Include="..\..\imgui_draw.cpp" />
<ClCompile Include="..\..\imgui_tables.cpp" />
<ClCompile Include="..\..\imgui_widgets.cpp" />
<ClCompile Include="..\..\backends\imgui_impl_null.cpp" />
<ClCompile Include="main.cpp" />
</ItemGroup>
<ItemGroup>
<None Include="..\..\misc\debuggers\imgui.natstepfilter" />
<None Include="..\..\misc\debuggers\imgui.natvis" />
<None Include="..\README.txt" />
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">
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57
examples/example_null/example_null.vcxproj.filters Normal file
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@ -0,0 +1,57 @@
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup>
<Filter Include="imgui">
<UniqueIdentifier>{0587d7a3-f2ce-4d56-b84f-a0005d3bfce6}</UniqueIdentifier>
</Filter>
<Filter Include="sources">
<UniqueIdentifier>{08e36723-ce4f-4cff-9662-c40801cf1acf}</UniqueIdentifier>
</Filter>
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\imconfig.h">
<Filter>imgui</Filter>
</ClInclude>
<ClInclude Include="..\..\imgui.h">
<Filter>imgui</Filter>
</ClInclude>
<ClInclude Include="..\..\imgui_internal.h">
<Filter>imgui</Filter>
</ClInclude>
<ClInclude Include="..\..\backends\imgui_impl_null.h">
<Filter>sources</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\imgui.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="main.cpp">
<Filter>sources</Filter>
</ClCompile>
<ClCompile Include="..\..\imgui_demo.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="..\..\imgui_draw.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="..\..\imgui_tables.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="..\..\imgui_widgets.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="..\..\backends\imgui_impl_null.cpp">
<Filter>sources</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<None Include="..\README.txt" />
<None Include="..\..\misc\debuggers\imgui.natvis">
<Filter>imgui</Filter>
</None>
<None Include="..\..\misc\debuggers\imgui.natstepfilter">
<Filter>imgui</Filter>
</None>
</ItemGroup>
</Project>

15
examples/example_null/main.cpp
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@ -3,24 +3,23 @@
// This is useful to test building, but you cannot interact with anything here!
#include "imgui.h"
#include <stdio.h>
#include "imgui_impl_null.h"
int main(int, char**)
{
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO();
// Build atlas
//unsigned char* tex_pixels = nullptr;
//int tex_w, tex_h;
//io.Fonts->GetTexDataAsRGBA32(&tex_pixels, &tex_w, &tex_h);
io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures;
ImGui_ImplNullPlatform_Init();
ImGui_ImplNullRender_Init();
for (int n = 0; n < 20; n++)
{
printf("NewFrame() %d\n", n);
io.DisplaySize = ImVec2(1920, 1080);
io.DeltaTime = 1.0f / 60.0f;
ImGui_ImplNullPlatform_NewFrame();
ImGui_ImplNullRender_NewFrame();
ImGui::NewFrame();
static float f = 0.0f;
@ -33,6 +32,8 @@ int main(int, char**)
}
printf("DestroyContext()\n");
ImGui_ImplNullRender_Shutdown();
ImGui_ImplNullPlatform_Shutdown();
ImGui::DestroyContext();
return 0;
}

10
examples/imgui_examples.sln
View file

@ -41,6 +41,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "example_sdl3_sdlgpu3", "exa
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "example_sdl3_directx11", "example_sdl3_directx11\example_sdl3_directx11.vcxproj", "{009DAC16-1A9C-47BE-9770-A30A046E8090}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "example_null", "example_null\example_null.vcxproj", "{1A0BF63C-18EF-4BAE-A8DA-055481B11F5D}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Win32 = Debug|Win32
@ -201,6 +203,14 @@ Global
{009DAC16-1A9C-47BE-9770-A30A046E8090}.Release|Win32.Build.0 = Release|Win32
{009DAC16-1A9C-47BE-9770-A30A046E8090}.Release|x64.ActiveCfg = Release|x64
{009DAC16-1A9C-47BE-9770-A30A046E8090}.Release|x64.Build.0 = Release|x64
{1A0BF63C-18EF-4BAE-A8DA-055481B11F5D}.Debug|Win32.ActiveCfg = Debug|Win32
{1A0BF63C-18EF-4BAE-A8DA-055481B11F5D}.Debug|Win32.Build.0 = Debug|Win32
{1A0BF63C-18EF-4BAE-A8DA-055481B11F5D}.Debug|x64.ActiveCfg = Debug|x64
{1A0BF63C-18EF-4BAE-A8DA-055481B11F5D}.Debug|x64.Build.0 = Debug|x64
{1A0BF63C-18EF-4BAE-A8DA-055481B11F5D}.Release|Win32.ActiveCfg = Release|Win32
{1A0BF63C-18EF-4BAE-A8DA-055481B11F5D}.Release|Win32.Build.0 = Release|Win32
{1A0BF63C-18EF-4BAE-A8DA-055481B11F5D}.Release|x64.ActiveCfg = Release|x64
{1A0BF63C-18EF-4BAE-A8DA-055481B11F5D}.Release|x64.Build.0 = Release|x64
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE