mirror of https://github.com/ocornut/imgui
Backends: DX9: less duplicate code
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bdf517c1c1
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1424f6be03
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@ -99,6 +99,52 @@ static D3DMATRIX ImGui_ImplDX9_BuildProjectionMatrix(ImDrawData* draw_data)
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return mat_projection;
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}
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static void ImGui_ImplDX9_ResetRenderState(ImDrawData* draw_data);
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static void ImGui_ImplDX9_RenderCommandLists(ImDrawData* draw_data)
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{
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ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
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// Render command lists
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// (Because we merged all buffers into a single one, we maintain our own offset into them)
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int global_vtx_offset = 0;
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int global_idx_offset = 0;
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ImVec2 clip_off = draw_data->DisplayPos;
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for (int n = 0; n < draw_data->CmdListsCount; n++)
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{
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const ImDrawList* cmd_list = draw_data->CmdLists[n];
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for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
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{
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const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
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if (pcmd->UserCallback != nullptr)
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{
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// User callback, registered via ImDrawList::AddCallback()
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// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
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if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
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ImGui_ImplDX9_ResetRenderState(draw_data);
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else
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pcmd->UserCallback(cmd_list, pcmd);
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}
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else
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{
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// Project scissor/clipping rectangles into framebuffer space
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ImVec2 clip_min(pcmd->ClipRect.x - clip_off.x, pcmd->ClipRect.y - clip_off.y);
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ImVec2 clip_max(pcmd->ClipRect.z - clip_off.x, pcmd->ClipRect.w - clip_off.y);
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if (clip_max.x < clip_min.x || clip_max.y < clip_min.y)
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continue;
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// Apply Scissor/clipping rectangle, Bind texture, Draw
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const RECT rect = { (LONG)clip_min.x, (LONG)clip_min.y, (LONG)clip_max.x, (LONG)clip_max.y };
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bd->pd3dDevice->SetScissorRect(&rect);
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bd->pd3dDevice->SetTexture(0, (IDirect3DTexture9*)pcmd->GetTexID());
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bd->pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, pcmd->VtxOffset + global_vtx_offset, 0, (UINT)cmd_list->VtxBuffer.Size, pcmd->IdxOffset + global_idx_offset, pcmd->ElemCount / 3);
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}
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}
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global_idx_offset += cmd_list->IdxBuffer.Size;
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global_vtx_offset += cmd_list->VtxBuffer.Size;
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}
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}
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// Programmable render pipeline
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static bool ImGui_ImplDX9WithShader_CreateDeviceObjects()
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{
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@ -339,43 +385,7 @@ static bool ImGui_ImplDX9WithShader_RenderDrawData(ImDrawData* draw_data)
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ImGui_ImplDX9WithShader_SetRenderState(draw_data);
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// Render command lists
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// (Because we merged all buffers into a single one, we maintain our own offset into them)
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int global_vtx_offset = 0;
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int global_idx_offset = 0;
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ImVec2 clip_off = draw_data->DisplayPos;
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for (int n = 0; n < draw_data->CmdListsCount; n++)
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{
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const ImDrawList* cmd_list = draw_data->CmdLists[n];
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for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
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{
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const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
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if (pcmd->UserCallback != nullptr)
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{
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// User callback, registered via ImDrawList::AddCallback()
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// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
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if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
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ImGui_ImplDX9WithShader_SetRenderState(draw_data);
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else
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pcmd->UserCallback(cmd_list, pcmd);
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}
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else
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{
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// Project scissor/clipping rectangles into framebuffer space
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ImVec2 clip_min(pcmd->ClipRect.x - clip_off.x, pcmd->ClipRect.y - clip_off.y);
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ImVec2 clip_max(pcmd->ClipRect.z - clip_off.x, pcmd->ClipRect.w - clip_off.y);
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if (clip_max.x < clip_min.x || clip_max.y < clip_min.y)
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continue;
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// Apply Scissor/clipping rectangle, Bind texture, Draw
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const RECT rect = { (LONG)clip_min.x, (LONG)clip_min.y, (LONG)clip_max.x, (LONG)clip_max.y };
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bd->pd3dDevice->SetScissorRect(&rect);
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bd->pd3dDevice->SetTexture(0, (IDirect3DTexture9*)pcmd->GetTexID());
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bd->pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, pcmd->VtxOffset + global_vtx_offset, 0, (UINT)cmd_list->VtxBuffer.Size, pcmd->IdxOffset + global_idx_offset, pcmd->ElemCount / 3);
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}
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}
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global_idx_offset += cmd_list->IdxBuffer.Size;
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global_vtx_offset += cmd_list->VtxBuffer.Size;
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}
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ImGui_ImplDX9_RenderCommandLists(draw_data);
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// Restore the DX9 state
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bd->pd3dDevice->SetVertexShaderConstantF(0, (float*)&last_float4x4, 4);
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@ -389,6 +399,11 @@ static void ImGui_ImplDX9_SetupRenderState(ImDrawData* draw_data)
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{
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ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
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// Setup buffers
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bd->pd3dDevice->SetStreamSource(0, bd->pVB, 0, sizeof(CUSTOMVERTEX));
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bd->pd3dDevice->SetIndices(bd->pIB);
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bd->pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
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// Setup viewport
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D3DVIEWPORT9 vp;
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vp.X = vp.Y = 0;
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@ -440,6 +455,15 @@ static void ImGui_ImplDX9_SetupRenderState(ImDrawData* draw_data)
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bd->pd3dDevice->SetTransform(D3DTS_PROJECTION, &mat_projection);
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}
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void ImGui_ImplDX9_ResetRenderState(ImDrawData* draw_data)
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{
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ImGui_ImplDX9_Data* bd = ImGui_ImplDX9_GetBackendData();
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if (bd->IsShaderSupported)
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ImGui_ImplDX9WithShader_SetRenderState(draw_data);
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else
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ImGui_ImplDX9_SetupRenderState(draw_data);
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}
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// Render function.
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void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
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{
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@ -526,52 +550,12 @@ void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
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}
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bd->pVB->Unlock();
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bd->pIB->Unlock();
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bd->pd3dDevice->SetStreamSource(0, bd->pVB, 0, sizeof(CUSTOMVERTEX));
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bd->pd3dDevice->SetIndices(bd->pIB);
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bd->pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
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// Setup desired DX state
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ImGui_ImplDX9_SetupRenderState(draw_data);
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// Render command lists
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// (Because we merged all buffers into a single one, we maintain our own offset into them)
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int global_vtx_offset = 0;
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int global_idx_offset = 0;
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ImVec2 clip_off = draw_data->DisplayPos;
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for (int n = 0; n < draw_data->CmdListsCount; n++)
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{
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const ImDrawList* cmd_list = draw_data->CmdLists[n];
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for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
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{
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const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
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if (pcmd->UserCallback != nullptr)
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{
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// User callback, registered via ImDrawList::AddCallback()
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// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
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if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
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ImGui_ImplDX9_SetupRenderState(draw_data);
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else
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pcmd->UserCallback(cmd_list, pcmd);
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}
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else
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{
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// Project scissor/clipping rectangles into framebuffer space
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ImVec2 clip_min(pcmd->ClipRect.x - clip_off.x, pcmd->ClipRect.y - clip_off.y);
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ImVec2 clip_max(pcmd->ClipRect.z - clip_off.x, pcmd->ClipRect.w - clip_off.y);
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if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
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continue;
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// Apply Scissor/clipping rectangle, Bind texture, Draw
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const RECT r = { (LONG)clip_min.x, (LONG)clip_min.y, (LONG)clip_max.x, (LONG)clip_max.y };
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const LPDIRECT3DTEXTURE9 texture = (LPDIRECT3DTEXTURE9)pcmd->GetTexID();
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bd->pd3dDevice->SetTexture(0, texture);
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bd->pd3dDevice->SetScissorRect(&r);
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bd->pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, pcmd->VtxOffset + global_vtx_offset, 0, (UINT)cmd_list->VtxBuffer.Size, pcmd->IdxOffset + global_idx_offset, pcmd->ElemCount / 3);
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}
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}
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global_idx_offset += cmd_list->IdxBuffer.Size;
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global_vtx_offset += cmd_list->VtxBuffer.Size;
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}
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ImGui_ImplDX9_RenderCommandLists(draw_data);
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// Restore the DX9 transform
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bd->pd3dDevice->SetTransform(D3DTS_WORLD, &last_world);
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