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Examples/Backends: DirectX9/10/11/12, Vulkan, OpenGL3 (Desktop GL only): Added support for large meshes (64k+ vertices) with 16-bits indices, enable 'ImGuiBackendFlags_HasVtxOffset' config flag in back-end. (#2591)

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omar
2019-05-29 15:53:36 +02:00
parent d1e8b698d0
commit b3dd03f582
13 changed files with 69 additions and 28 deletions
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14
examples/imgui_impl_dx9.cpp
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@ -3,6 +3,7 @@
// Implemented features:
// [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
// [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
@ -10,6 +11,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2019-05-29: DirectX9: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_HasVtxOffset flag.
// 2019-04-30: DirectX9: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
// 2019-03-29: Misc: Fixed erroneous assert in ImGui_ImplDX9_InvalidateDeviceObjects().
// 2019-01-16: Misc: Disabled fog before drawing UI's. Fixes issue #2288.
@ -172,8 +174,9 @@ void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
ImGui_ImplDX9_SetupRenderState(draw_data);
// Render command lists
int vtx_offset = 0;
int idx_offset = 0;
// (Because we merged all buffers into a single one, we maintain our own offset into them)
int global_vtx_offset = 0;
int global_idx_offset = 0;
ImVec2 clip_off = draw_data->DisplayPos;
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
@ -196,11 +199,11 @@ void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
const LPDIRECT3DTEXTURE9 texture = (LPDIRECT3DTEXTURE9)pcmd->TextureId;
g_pd3dDevice->SetTexture(0, texture);
g_pd3dDevice->SetScissorRect(&r);
g_pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, vtx_offset, 0, (UINT)cmd_list->VtxBuffer.Size, idx_offset, pcmd->ElemCount/3);
g_pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, pcmd->VtxOffset + global_vtx_offset, 0, (UINT)cmd_list->VtxBuffer.Size, pcmd->IdxOffset + global_idx_offset, pcmd->ElemCount/3);
}
idx_offset += pcmd->ElemCount;
}
vtx_offset += cmd_list->VtxBuffer.Size;
global_idx_offset += cmd_list->IdxBuffer.Size;
global_vtx_offset += cmd_list->VtxBuffer.Size;
}
// Restore the DX9 transform
@ -217,6 +220,7 @@ bool ImGui_ImplDX9_Init(IDirect3DDevice9* device)
{
ImGuiIO& io = ImGui::GetIO();
io.BackendRendererName = "imgui_impl_dx9";
io.BackendFlags |= ImGuiBackendFlags_HasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
g_pd3dDevice = device;
g_pd3dDevice->AddRef();