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Module support is easy to break from the header side, e.g. by a new system include, a forward-declared platform type, or an export block that misses a declaration. This adds a CMake project that builds every module whose platform library is found, alongside the header build of the same code. Linking alone doesn't show that the module behaves like the headers, so the main check is differential. 'DIFF' tests are compiled once with 'import imgui;' and once with '#include "imgui.h"'. Both builds run the same scripted frames and must print the same hash of the draw data and texture uploads (test_diff.h, compare_output.cmake). Backends that need a GPU or a display are only linked, and wgpu is only compiled. The core module and the null backend are also built for each compile-time configuration that CI builds example_null with, because IMGUI_DISABLE_* and friends change what gets exported. Presets use Clang, Ninja and 'import std'. Toolchains for cross builds belong in CMakeUserPresets.json, which is ignored along with build/.
22 lines
785 B
C++
22 lines
785 B
C++
// dear imgui: compile-only test for the C++20 backend module 'imgui.impl.wgpu' (Dawn or wgpu-native headers, no library needed).
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#include <webgpu/webgpu.h> // application-side platform headers
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import std;
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import imgui;
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import imgui.impl.wgpu;
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static_assert(sizeof(ImGui_ImplWGPU_InitInfo) > 0);
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void RenderFrameWGPU(WGPUDevice device, WGPURenderPassEncoder pass_encoder)
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{
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ImGui_ImplWGPU_InitInfo init_info;
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init_info.Device = device;
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init_info.RenderTargetFormat = WGPUTextureFormat_BGRA8Unorm;
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ImGui_ImplWGPU_Init(&init_info);
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ImGui_ImplWGPU_NewFrame();
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ImGui::NewFrame();
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ImGui::Render();
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ImGui_ImplWGPU_RenderDrawData(ImGui::GetDrawData(), pass_encoder);
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std::println("{}", ImGui_ImplWGPU_GetBackendTypeName(WGPUBackendType_Vulkan));
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}
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