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Backends: Allegro5: Brough back al_draw_indexed_prim when available. (#5937)
Amend 185b4dde
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@ -7,7 +7,7 @@
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// [X] Platform: Clipboard support (from Allegro 5.1.12)
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// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
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// Issues:
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// [ ] Renderer: The renderer is suboptimal as we need to unindex our buffers and convert vertices manually.
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// [ ] Renderer: The renderer is suboptimal as we need to convert vertices manually.
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// [ ] Platform: Missing gamepad support.
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// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
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@ -132,13 +132,12 @@ void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
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{
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const ImDrawList* cmd_list = draw_data->CmdLists[n];
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// Allegro's implementation of al_draw_indexed_prim() for DX9 is completely broken. Unindex our buffers ourselves.
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// FIXME-OPT: Unfortunately Allegro doesn't support 32-bit packed colors so we have to convert them to 4 float as well..
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static ImVector<ImDrawVertAllegro> vertices;
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vertices.resize(cmd_list->IdxBuffer.Size);
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for (int i = 0; i < cmd_list->IdxBuffer.Size; i++)
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vertices.resize(cmd_list->VtxBuffer.Size);
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for (int i = 0; i < cmd_list->VtxBuffer.Size; i++)
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{
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const ImDrawVert* src_v = &cmd_list->VtxBuffer[cmd_list->IdxBuffer[i]];
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const ImDrawVert* src_v = &cmd_list->VtxBuffer[i];
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ImDrawVertAllegro* dst_v = &vertices[i];
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dst_v->pos = src_v->pos;
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dst_v->uv = src_v->uv;
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@ -187,7 +186,9 @@ void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
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// Apply scissor/clipping rectangle, Draw
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ALLEGRO_BITMAP* texture = (ALLEGRO_BITMAP*)pcmd->GetTexID();
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al_set_clipping_rectangle(clip_min.x, clip_min.y, clip_max.x - clip_min.x, clip_max.y - clip_min.y);
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al_draw_prim(&vertices[0], bd->VertexDecl, texture, pcmd->IdxOffset, pcmd->IdxOffset + pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST);
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if(pcmd->ElemCount > 0) {
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al_draw_indexed_prim(&vertices[0], bd->VertexDecl, texture, &indices[pcmd->IdxOffset], pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST);
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}
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}
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}
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}
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