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Backends: Allegro5: Brough back al_draw_indexed_prim when available. (#5937)

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Amend 185b4dde
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Espyo 2022-11-29 20:56:10 +00:00 committed by ocornut
parent bf4c2e00c0
commit 50aeeff96c
1 changed files with 7 additions and 6 deletions
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13
backends/imgui_impl_allegro5.cpp
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@ -7,7 +7,7 @@
// [X] Platform: Clipboard support (from Allegro 5.1.12) // [X] Platform: Clipboard support (from Allegro 5.1.12)
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. // [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
// Issues: // Issues:
// [ ] Renderer: The renderer is suboptimal as we need to unindex our buffers and convert vertices manually. // [ ] Renderer: The renderer is suboptimal as we need to convert vertices manually.
// [ ] Platform: Missing gamepad support. // [ ] Platform: Missing gamepad support.
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this. // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
@ -132,13 +132,12 @@ void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
{ {
const ImDrawList* cmd_list = draw_data->CmdLists[n]; const ImDrawList* cmd_list = draw_data->CmdLists[n];
// Allegro's implementation of al_draw_indexed_prim() for DX9 is completely broken. Unindex our buffers ourselves.
// FIXME-OPT: Unfortunately Allegro doesn't support 32-bit packed colors so we have to convert them to 4 float as well.. // FIXME-OPT: Unfortunately Allegro doesn't support 32-bit packed colors so we have to convert them to 4 float as well..
static ImVector<ImDrawVertAllegro> vertices; static ImVector<ImDrawVertAllegro> vertices;
vertices.resize(cmd_list->IdxBuffer.Size); vertices.resize(cmd_list->VtxBuffer.Size);
for (int i = 0; i < cmd_list->IdxBuffer.Size; i++) for (int i = 0; i < cmd_list->VtxBuffer.Size; i++)
{ {
const ImDrawVert* src_v = &cmd_list->VtxBuffer[cmd_list->IdxBuffer[i]]; const ImDrawVert* src_v = &cmd_list->VtxBuffer[i];
ImDrawVertAllegro* dst_v = &vertices[i]; ImDrawVertAllegro* dst_v = &vertices[i];
dst_v->pos = src_v->pos; dst_v->pos = src_v->pos;
dst_v->uv = src_v->uv; dst_v->uv = src_v->uv;
@ -187,7 +186,9 @@ void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
// Apply scissor/clipping rectangle, Draw // Apply scissor/clipping rectangle, Draw
ALLEGRO_BITMAP* texture = (ALLEGRO_BITMAP*)pcmd->GetTexID(); ALLEGRO_BITMAP* texture = (ALLEGRO_BITMAP*)pcmd->GetTexID();
al_set_clipping_rectangle(clip_min.x, clip_min.y, clip_max.x - clip_min.x, clip_max.y - clip_min.y); al_set_clipping_rectangle(clip_min.x, clip_min.y, clip_max.x - clip_min.x, clip_max.y - clip_min.y);
al_draw_prim(&vertices[0], bd->VertexDecl, texture, pcmd->IdxOffset, pcmd->IdxOffset + pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST); if(pcmd->ElemCount > 0) {
al_draw_indexed_prim(&vertices[0], bd->VertexDecl, texture, &indices[pcmd->IdxOffset], pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST);
}
} }
} }
} }