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Merge branch 'master' into docking

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# Conflicts:
#	backends/imgui_impl_dx10.cpp
#	backends/imgui_impl_dx11.cpp
#	backends/imgui_impl_dx12.cpp
#	backends/imgui_impl_dx9.cpp
#	backends/imgui_impl_metal.h
#	backends/imgui_impl_metal.mm
#	backends/imgui_impl_opengl2.cpp
#	backends/imgui_impl_opengl3.cpp
#	backends/imgui_impl_sdl3.cpp
#	backends/imgui_impl_sdlgpu3.cpp
#	backends/imgui_impl_sdlrenderer2.cpp
#	backends/imgui_impl_sdlrenderer2.h
#	backends/imgui_impl_vulkan.cpp
#	imgui.cpp
This commit is contained in:
ocornut
2026-04-23 22:11:04 +02:00
parent dee5bf3ec3 6b05f711fd
commit a31071573b
33 changed files with 362 additions and 154 deletions
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80
backends/imgui_impl_wgpu.cpp
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@@ -22,6 +22,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2026-04-23: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. (#9378)
// 2026-03-25: Added support for WGVK native backend via IMGUI_IMPL_WEBGPU_BACKEND_WGVK define, with SPIRV shaders if WGSL is not available. (#9316, #9246, #9257)
// 2026-03-09: Removed support for Emscripten < 4.0.10. (#9281)
// 2025-10-16: Update to compile with Dawn and Emscripten's 4.0.10+ '--use-port=emdawnwebgpu' ports. (#8381, #8898)
@@ -85,11 +86,13 @@ struct ImGui_ImplWGPU_Texture
struct RenderResources
{
WGPUSampler SamplerLinear = nullptr; // Sampler for textures
WGPUBuffer Uniforms = nullptr; // Shader uniforms
WGPUBindGroup CommonBindGroup = nullptr; // Resources bind-group to bind the common resources to pipeline
ImGuiStorage ImageBindGroups; // Resources bind-group to bind the font/image resources to pipeline (this is a key->value map)
WGPUBindGroupLayout ImageBindGroupLayout = nullptr; // Cache layout used for the image bind group. Avoids allocating unnecessary JS objects when working with WebASM
WGPUSampler SamplerLinear = nullptr; // Bilinear sampler
WGPUSampler SamplerNearest = nullptr; // Nearest/point sampler
WGPUBuffer Uniforms = nullptr; // Shader uniforms
WGPUBindGroup CommonBindGroupLinear = nullptr; // Common bind-group bound to group 0 (uniforms + SamplerLinear)
WGPUBindGroup CommonBindGroupNearest = nullptr; // Common bind-group bound to group 0 (uniforms + SamplerNearest)
ImGuiStorage ImageBindGroups; // Resources bind-group to bind the font/image resources to pipeline (this is a key->value map)
WGPUBindGroupLayout ImageBindGroupLayout = nullptr; // Cache layout used for the image bind group. Avoids allocating unnecessary JS objects when working with WebASM
};
struct FrameResources
@@ -116,6 +119,7 @@ struct ImGui_ImplWGPU_Data
WGPUTextureFormat renderTargetFormat = WGPUTextureFormat_Undefined;
WGPUTextureFormat depthStencilFormat = WGPUTextureFormat_Undefined;
WGPURenderPipeline pipelineState = nullptr;
ImGui_ImplWGPU_RenderState* RenderState = nullptr; // == ImGui::GetPlatformIO().Renderer_RenderState during rendering.
RenderResources renderResources;
FrameResources* pFrameResources = nullptr;
@@ -299,8 +303,10 @@ static void SafeRelease(WGPUShaderModule& res)
static void SafeRelease(RenderResources& res)
{
SafeRelease(res.SamplerLinear);
SafeRelease(res.SamplerNearest);
SafeRelease(res.Uniforms);
SafeRelease(res.CommonBindGroup);
SafeRelease(res.CommonBindGroupLinear);
SafeRelease(res.CommonBindGroupNearest);
SafeRelease(res.ImageBindGroupLayout);
};
@@ -315,6 +321,7 @@ static void SafeRelease(FrameResources& res)
static WGPUProgrammableStageDescriptor ImGui_ImplWGPU_CreateShaderModuleWGSL(const char* wgsl_source)
{
ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData();
IM_UNUSED(bd);
WGPUShaderSourceWGSL wgsl_desc = {};
wgsl_desc.chain.sType = WGPUSType_ShaderSourceWGSL;
@@ -324,9 +331,10 @@ static WGPUProgrammableStageDescriptor ImGui_ImplWGPU_CreateShaderModuleWGSL(con
desc.nextInChain = (WGPUChainedStruct*)&wgsl_desc;
WGPUProgrammableStageDescriptor stage_desc = {};
#if !defined(IMGUI_IMPL_WEBGPU_BACKEND_WGVK)
stage_desc.module = wgpuDeviceCreateShaderModule(bd->wgpuDevice, &desc);
stage_desc.entryPoint = { "main", WGPU_STRLEN };
#endif
return stage_desc;
}
@@ -420,15 +428,19 @@ static void ImGui_ImplWGPU_SetupRenderState(ImDrawData* draw_data, WGPURenderPas
wgpuRenderPassEncoderSetVertexBuffer(ctx, 0, fr->VertexBuffer, 0, fr->VertexBufferSize * sizeof(ImDrawVert));
wgpuRenderPassEncoderSetIndexBuffer(ctx, fr->IndexBuffer, sizeof(ImDrawIdx) == 2 ? WGPUIndexFormat_Uint16 : WGPUIndexFormat_Uint32, 0, fr->IndexBufferSize * sizeof(ImDrawIdx));
wgpuRenderPassEncoderSetPipeline(ctx, bd->pipelineState);
wgpuRenderPassEncoderSetBindGroup(ctx, 0, bd->renderResources.CommonBindGroup, 0, nullptr);
wgpuRenderPassEncoderSetBindGroup(ctx, 0, bd->renderResources.CommonBindGroupLinear, 0, nullptr);
// Setup blend factor
WGPUColor blend_color = { 0.f, 0.f, 0.f, 0.f };
wgpuRenderPassEncoderSetBlendConstant(ctx, &blend_color);
}
// Draw callbacks
static void ImGui_ImplWGPU_DrawCallback_ResetRenderState(const ImDrawList*, const ImDrawCmd*) {} // Intentionally empty. Used as an identifier for rendering loop to call its code. Simpler to implement this way.
static void ImGui_ImplWGPU_DrawCallback_SetSamplerLinear(const ImDrawList*, const ImDrawCmd*) { ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData(); wgpuRenderPassEncoderSetBindGroup(bd->RenderState->RenderPassEncoder, 0, bd->renderResources.CommonBindGroupLinear, 0, nullptr); }
static void ImGui_ImplWGPU_DrawCallback_SetSamplerNearest(const ImDrawList*, const ImDrawCmd*) { ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData(); wgpuRenderPassEncoderSetBindGroup(bd->RenderState->RenderPassEncoder, 0, bd->renderResources.CommonBindGroupNearest, 0, nullptr); }
// Render function
// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder pass_encoder)
{
// Avoid rendering when minimized
@@ -523,7 +535,7 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
ImGui_ImplWGPU_RenderState render_state;
render_state.Device = bd->wgpuDevice;
render_state.RenderPassEncoder = pass_encoder;
platform_io.Renderer_RenderState = &render_state;
platform_io.Renderer_RenderState = bd->RenderState = &render_state;
// Render command lists
// (Because we merged all buffers into a single one, we maintain our own offset into them)
@@ -539,9 +551,7 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
if (pcmd->UserCallback != nullptr)
{
// User callback, registered via ImDrawList::AddCallback()
// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
IM_ASSERT(pcmd->UserCallback != ImDrawCallback_SetSamplerLinear && pcmd->UserCallback != ImDrawCallback_SetSamplerNearest); // Unsupported.
if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
if (pcmd->UserCallback == ImGui_ImplWGPU_DrawCallback_ResetRenderState)
ImGui_ImplWGPU_SetupRenderState(draw_data, pass_encoder, fr);
else
pcmd->UserCallback(draw_list, pcmd);
@@ -552,12 +562,11 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
ImTextureID tex_id = pcmd->GetTexID();
ImGuiID tex_id_hash = ImHashData(&tex_id, sizeof(tex_id), 0);
WGPUBindGroup bind_group = (WGPUBindGroup)bd->renderResources.ImageBindGroups.GetVoidPtr(tex_id_hash);
if (!bind_group)
{
bind_group = ImGui_ImplWGPU_CreateImageBindGroup(bd->renderResources.ImageBindGroupLayout, (WGPUTextureView)tex_id);
bd->renderResources.ImageBindGroups.SetVoidPtr(tex_id_hash, bind_group);
}
wgpuRenderPassEncoderSetBindGroup(pass_encoder, 1, (WGPUBindGroup)bind_group, 0, nullptr);
if (!bind_group && tex_id != 0)
if ((bind_group = ImGui_ImplWGPU_CreateImageBindGroup(bd->renderResources.ImageBindGroupLayout, (WGPUTextureView)tex_id)) != 0)
bd->renderResources.ImageBindGroups.SetVoidPtr(tex_id_hash, bind_group);
if (bind_group)
wgpuRenderPassEncoderSetBindGroup(pass_encoder, 1, (WGPUBindGroup)bind_group, 0, nullptr);
// Project scissor/clipping rectangles into framebuffer space
ImVec2 clip_min((pcmd->ClipRect.x - clip_off.x) * clip_scale.x, (pcmd->ClipRect.y - clip_off.y) * clip_scale.y);
@@ -566,8 +575,8 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
// Clamp to viewport as wgpuRenderPassEncoderSetScissorRect() won't accept values that are off bounds
if (clip_min.x < 0.0f) { clip_min.x = 0.0f; }
if (clip_min.y < 0.0f) { clip_min.y = 0.0f; }
if (clip_max.x > fb_width) { clip_max.x = (float)fb_width; }
if (clip_max.y > fb_height) { clip_max.y = (float)fb_height; }
if (clip_max.x > (float)fb_width) { clip_max.x = (float)fb_width; }
if (clip_max.y > (float)fb_height) { clip_max.y = (float)fb_height; }
if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
continue;
@@ -589,7 +598,7 @@ void ImGui_ImplWGPU_RenderDrawData(ImDrawData* draw_data, WGPURenderPassEncoder
}
image_bind_groups.Data.resize(0);
platform_io.Renderer_RenderState = nullptr;
platform_io.Renderer_RenderState = bd->RenderState = nullptr;
}
static void ImGui_ImplWGPU_DestroyTexture(ImTextureData* tex)
@@ -817,19 +826,23 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
ImGui_ImplWGPU_CreateUniformBuffer();
// Create sampler
// Create samplers (Linear/Nearest)
// (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
WGPUSamplerDescriptor sampler_desc = {};
sampler_desc.minFilter = WGPUFilterMode_Linear;
sampler_desc.magFilter = WGPUFilterMode_Linear;
sampler_desc.mipmapFilter = WGPUMipmapFilterMode_Linear;
sampler_desc.addressModeU = WGPUAddressMode_ClampToEdge;
sampler_desc.addressModeV = WGPUAddressMode_ClampToEdge;
sampler_desc.addressModeW = WGPUAddressMode_ClampToEdge;
sampler_desc.maxAnisotropy = 1;
sampler_desc.minFilter = WGPUFilterMode_Linear;
sampler_desc.magFilter = WGPUFilterMode_Linear;
sampler_desc.mipmapFilter = WGPUMipmapFilterMode_Linear;
bd->renderResources.SamplerLinear = wgpuDeviceCreateSampler(bd->wgpuDevice, &sampler_desc);
sampler_desc.minFilter = WGPUFilterMode_Nearest;
sampler_desc.magFilter = WGPUFilterMode_Nearest;
sampler_desc.mipmapFilter = WGPUMipmapFilterMode_Nearest;
bd->renderResources.SamplerNearest = wgpuDeviceCreateSampler(bd->wgpuDevice, &sampler_desc);
// Create resource bind group
// Create resource bind groups (one per sampler, otherwise identical)
WGPUBindGroupEntry common_bg_entries[] =
{
{ nullptr, 0, bd->renderResources.Uniforms, 0, MEMALIGN(sizeof(Uniforms), 16), 0, 0 },
@@ -839,7 +852,9 @@ bool ImGui_ImplWGPU_CreateDeviceObjects()
common_bg_descriptor.layout = bg_layouts[0];
common_bg_descriptor.entryCount = sizeof(common_bg_entries) / sizeof(WGPUBindGroupEntry);
common_bg_descriptor.entries = common_bg_entries;
bd->renderResources.CommonBindGroup = wgpuDeviceCreateBindGroup(bd->wgpuDevice, &common_bg_descriptor);
bd->renderResources.CommonBindGroupLinear = wgpuDeviceCreateBindGroup(bd->wgpuDevice, &common_bg_descriptor);
common_bg_entries[1].sampler = bd->renderResources.SamplerNearest;
bd->renderResources.CommonBindGroupNearest = wgpuDeviceCreateBindGroup(bd->wgpuDevice, &common_bg_descriptor);
bd->renderResources.ImageBindGroupLayout = bg_layouts[1];
SafeRelease(vertex_shader_desc.module);
@@ -891,6 +906,11 @@ bool ImGui_ImplWGPU_Init(ImGui_ImplWGPU_InitInfo* init_info)
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures; // We can honor ImGuiPlatformIO::Textures[] requests during render.
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
platform_io.DrawCallback_ResetRenderState = ImGui_ImplWGPU_DrawCallback_ResetRenderState;
platform_io.DrawCallback_SetSamplerLinear = ImGui_ImplWGPU_DrawCallback_SetSamplerLinear;
platform_io.DrawCallback_SetSamplerNearest = ImGui_ImplWGPU_DrawCallback_SetSamplerNearest;
bd->initInfo = *init_info;
bd->wgpuDevice = init_info->Device;
bd->defaultQueue = wgpuDeviceGetQueue(bd->wgpuDevice);
@@ -899,11 +919,7 @@ bool ImGui_ImplWGPU_Init(ImGui_ImplWGPU_InitInfo* init_info)
bd->numFramesInFlight = init_info->NumFramesInFlight;
bd->frameIndex = UINT_MAX;
bd->renderResources.SamplerLinear = nullptr;
bd->renderResources.Uniforms = nullptr;
bd->renderResources.CommonBindGroup = nullptr;
bd->renderResources.ImageBindGroups.Data.reserve(100);
bd->renderResources.ImageBindGroupLayout = nullptr;
// Create buffers with a default size (they will later be grown as needed)
bd->pFrameResources = new FrameResources[bd->numFramesInFlight];