// dear imgui: Renderer + Platform Binding for Allegro 5 // (Info: Allegro 5 is a cross-platform general purpose library for handling windows, inputs, graphics, etc.) // Implemented features: // [X] Renderer: User texture binding. Use 'ALLEGRO_BITMAP*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp. // [X] Platform: Clipboard support (from Allegro 5.1.12) // [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. // Issues: // [ ] Renderer: The renderer is suboptimal as we need to unindex our buffers and convert vertices manually. // [ ] Platform: Missing gamepad support. // 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. // https://github.com/ocornut/imgui, Original Allegro 5 code by @birthggd // CHANGELOG // (minor and older changes stripped away, please see git history for details) // 2018-06-13: Platform: Added clipboard support (from Allegro 5.1.12). // 2018-06-13: Renderer: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle. // 2018-06-13: Renderer: Backup/restore transform and clipping rectangle. // 2018-06-11: Misc: Setup io.BackendFlags ImGuiBackendFlags_HasMouseCursors flag + honor ImGuiConfigFlags_NoMouseCursorChange flag. // 2018-04-18: Misc: Renamed file from imgui_impl_a5.cpp to imgui_impl_allegro5.cpp. // 2018-04-18: Misc: Added support for 32-bits vertex indices to avoid conversion at runtime. Added imconfig_allegro5.h to enforce 32-bit indices when included from imgui.h. // 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplAllegro5_RenderDrawData() in the .h file so you can call it yourself. // 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves. // 2018-02-06: Inputs: Added mapping for ImGuiKey_Space. #include // uint64_t #include // memcpy #include "imgui.h" #include "imgui_impl_allegro5.h" // Allegro #include #include #ifdef _WIN32 #include #endif #define ALLEGRO_HAS_CLIPBOARD (ALLEGRO_VERSION_INT >= ((5 << 24) | (1 << 16) | (12 << 8))) // Clipboard only supported from Allegro 5.1.12 // Visual Studio warnings #ifdef _MSC_VER #pragma warning (disable: 4127) // condition expression is constant #endif // Data static ALLEGRO_DISPLAY* g_Display = NULL; static ALLEGRO_BITMAP* g_Texture = NULL; static double g_Time = 0.0; static ALLEGRO_MOUSE_CURSOR* g_MouseCursorInvisible = NULL; static ALLEGRO_VERTEX_DECL* g_VertexDecl = NULL; static char* g_ClipboardTextData = NULL; struct ImDrawVertAllegro { ImVec2 pos; ImVec2 uv; ALLEGRO_COLOR col; }; // 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_ImplAllegro5_RenderDrawData(ImDrawData* draw_data) { // Backup Allegro state that will be modified ALLEGRO_TRANSFORM last_transform = *al_get_current_transform(); ALLEGRO_TRANSFORM last_projection_transform = *al_get_current_projection_transform(); int last_clip_x, last_clip_y, last_clip_w, last_clip_h; al_get_clipping_rectangle(&last_clip_x, &last_clip_y, &last_clip_w, &last_clip_h); int last_blender_op, last_blender_src, last_blender_dst; al_get_blender(&last_blender_op, &last_blender_src, &last_blender_dst); // Setup render state al_set_blender(ALLEGRO_ADD, ALLEGRO_ALPHA, ALLEGRO_INVERSE_ALPHA); // Setup orthographic projection matrix // Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). { float L = draw_data->DisplayPos.x; float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x; float T = draw_data->DisplayPos.y; float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y; ALLEGRO_TRANSFORM transform; al_identity_transform(&transform); al_use_transform(&transform); al_orthographic_transform(&transform, L, T, 1.0f, R, B, -1.0f); al_use_projection_transform(&transform); } for (int n = 0; n < draw_data->CmdListsCount; 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-bits packed colors so we have to convert them to 4 float as well.. static ImVector vertices; vertices.resize(cmd_list->IdxBuffer.Size); for (int i = 0; i < cmd_list->IdxBuffer.Size; i++) { const ImDrawVert* src_v = &cmd_list->VtxBuffer[cmd_list->IdxBuffer[i]]; ImDrawVertAllegro* dst_v = &vertices[i]; dst_v->pos = src_v->pos; dst_v->uv = src_v->uv; unsigned char* c = (unsigned char*)&src_v->col; dst_v->col = al_map_rgba(c[0], c[1], c[2], c[3]); } const int* indices = NULL; if (sizeof(ImDrawIdx) == 2) { // FIXME-OPT: Unfortunately Allegro doesn't support 16-bit indices.. You can '#define ImDrawIdx int' in imconfig.h to request Dear ImGui to output 32-bit indices. // Otherwise, we convert them from 16-bit to 32-bit at runtime here, which works perfectly but is a little wasteful. static ImVector indices_converted; indices_converted.resize(cmd_list->IdxBuffer.Size); for (int i = 0; i < cmd_list->IdxBuffer.Size; ++i) indices_converted[i] = (int)cmd_list->IdxBuffer.Data[i]; indices = indices_converted.Data; } else if (sizeof(ImDrawIdx) == 4) { indices = (const int*)cmd_list->IdxBuffer.Data; } int idx_offset = 0; ImVec2 pos = draw_data->DisplayPos; for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++) { const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i]; if (pcmd->UserCallback) { pcmd->UserCallback(cmd_list, pcmd); } else { ALLEGRO_BITMAP* texture = (ALLEGRO_BITMAP*)pcmd->TextureId; al_set_clipping_rectangle(pcmd->ClipRect.x - pos.x, pcmd->ClipRect.y - pos.y, pcmd->ClipRect.z - pcmd->ClipRect.x, pcmd->ClipRect.w - pcmd->ClipRect.y); al_draw_prim(&vertices[0], g_VertexDecl, texture, idx_offset, idx_offset + pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST); } idx_offset += pcmd->ElemCount; } } // Restore modified Allegro state al_set_blender(last_blender_op, last_blender_src, last_blender_dst); al_set_clipping_rectangle(last_clip_x, last_clip_y, last_clip_w, last_clip_h); al_use_transform(&last_transform); al_use_projection_transform(&last_projection_transform); } bool ImGui_ImplAllegro5_CreateDeviceObjects() { // Build texture atlas ImGuiIO &io = ImGui::GetIO(); unsigned char *pixels; int width, height; io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); // Create texture int flags = al_get_new_bitmap_flags(); int fmt = al_get_new_bitmap_format(); al_set_new_bitmap_flags(ALLEGRO_MEMORY_BITMAP|ALLEGRO_MIN_LINEAR|ALLEGRO_MAG_LINEAR); al_set_new_bitmap_format(ALLEGRO_PIXEL_FORMAT_ABGR_8888_LE); ALLEGRO_BITMAP* img = al_create_bitmap(width, height); al_set_new_bitmap_flags(flags); al_set_new_bitmap_format(fmt); if (!img) return false; ALLEGRO_LOCKED_REGION *locked_img = al_lock_bitmap(img, al_get_bitmap_format(img), ALLEGRO_LOCK_WRITEONLY); if (!locked_img) { al_destroy_bitmap(img); return false; } memcpy(locked_img->data, pixels, sizeof(int)*width*height); al_unlock_bitmap(img); // Convert software texture to hardware texture. ALLEGRO_BITMAP* cloned_img = al_clone_bitmap(img); al_destroy_bitmap(img); if (!cloned_img) return false; // Store our identifier io.Fonts->TexID = (void*)cloned_img; g_Texture = cloned_img; // Create an invisible mouse cursor // Because al_hide_mouse_cursor() seems to mess up with the actual inputs.. ALLEGRO_BITMAP* mouse_cursor = al_create_bitmap(8,8); g_MouseCursorInvisible = al_create_mouse_cursor(mouse_cursor, 0, 0); al_destroy_bitmap(mouse_cursor); return true; } void ImGui_ImplAllegro5_InvalidateDeviceObjects() { if (g_Texture) { al_destroy_bitmap(g_Texture); ImGui::GetIO().Fonts->TexID = NULL; g_Texture = NULL; } if (g_MouseCursorInvisible) { al_destroy_mouse_cursor(g_MouseCursorInvisible); g_MouseCursorInvisible = NULL; } } #if ALLEGRO_HAS_CLIPBOARD static const char* ImGui_ImplAllegro5_GetClipboardText(void*) { if (g_ClipboardTextData) al_free(g_ClipboardTextData); g_ClipboardTextData = al_get_clipboard_text(g_Display); return g_ClipboardTextData; } static void ImGui_ImplAllegro5_SetClipboardText(void*, const char* text) { al_set_clipboard_text(g_Display, text); } #endif bool ImGui_ImplAllegro5_Init(ALLEGRO_DISPLAY* display) { g_Display = display; // Setup back-end capabilities flags ImGuiIO& io = ImGui::GetIO(); io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional) // Create custom vertex declaration. // Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 floats. // We still use a custom declaration to use 'ALLEGRO_PRIM_TEX_COORD' instead of 'ALLEGRO_PRIM_TEX_COORD_PIXEL' else we can't do a reliable conversion. ALLEGRO_VERTEX_ELEMENT elems[] = { { ALLEGRO_PRIM_POSITION, ALLEGRO_PRIM_FLOAT_2, IM_OFFSETOF(ImDrawVertAllegro, pos) }, { ALLEGRO_PRIM_TEX_COORD, ALLEGRO_PRIM_FLOAT_2, IM_OFFSETOF(ImDrawVertAllegro, uv) }, { ALLEGRO_PRIM_COLOR_ATTR, 0, IM_OFFSETOF(ImDrawVertAllegro, col) }, { 0, 0, 0 } }; g_VertexDecl = al_create_vertex_decl(elems, sizeof(ImDrawVertAllegro)); io.KeyMap[ImGuiKey_Tab] = ALLEGRO_KEY_TAB; io.KeyMap[ImGuiKey_LeftArrow] = ALLEGRO_KEY_LEFT; io.KeyMap[ImGuiKey_RightArrow] = ALLEGRO_KEY_RIGHT; io.KeyMap[ImGuiKey_UpArrow] = ALLEGRO_KEY_UP; io.KeyMap[ImGuiKey_DownArrow] = ALLEGRO_KEY_DOWN; io.KeyMap[ImGuiKey_PageUp] = ALLEGRO_KEY_PGUP; io.KeyMap[ImGuiKey_PageDown] = ALLEGRO_KEY_PGDN; io.KeyMap[ImGuiKey_Home] = ALLEGRO_KEY_HOME; io.KeyMap[ImGuiKey_End] = ALLEGRO_KEY_END; io.KeyMap[ImGuiKey_Insert] = ALLEGRO_KEY_INSERT; io.KeyMap[ImGuiKey_Delete] = ALLEGRO_KEY_DELETE; io.KeyMap[ImGuiKey_Backspace] = ALLEGRO_KEY_BACKSPACE; io.KeyMap[ImGuiKey_Space] = ALLEGRO_KEY_SPACE; io.KeyMap[ImGuiKey_Enter] = ALLEGRO_KEY_ENTER; io.KeyMap[ImGuiKey_Escape] = ALLEGRO_KEY_ESCAPE; io.KeyMap[ImGuiKey_A] = ALLEGRO_KEY_A; io.KeyMap[ImGuiKey_C] = ALLEGRO_KEY_C; io.KeyMap[ImGuiKey_V] = ALLEGRO_KEY_V; io.KeyMap[ImGuiKey_X] = ALLEGRO_KEY_X; io.KeyMap[ImGuiKey_Y] = ALLEGRO_KEY_Y; io.KeyMap[ImGuiKey_Z] = ALLEGRO_KEY_Z; #if ALLEGRO_HAS_CLIPBOARD io.SetClipboardTextFn = ImGui_ImplAllegro5_SetClipboardText; io.GetClipboardTextFn = ImGui_ImplAllegro5_GetClipboardText; io.ClipboardUserData = NULL; #endif return true; } void ImGui_ImplAllegro5_Shutdown() { ImGui_ImplAllegro5_InvalidateDeviceObjects(); g_Display = NULL; // Destroy last known clipboard data if (g_ClipboardTextData) al_free(g_ClipboardTextData); g_ClipboardTextData = NULL; } // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs. // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application. // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application. // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags. bool ImGui_ImplAllegro5_ProcessEvent(ALLEGRO_EVENT *ev) { ImGuiIO& io = ImGui::GetIO(); switch (ev->type) { case ALLEGRO_EVENT_MOUSE_AXES: io.MouseWheel += ev->mouse.dz; io.MouseWheelH += ev->mouse.dw; return true; case ALLEGRO_EVENT_KEY_CHAR: if (ev->keyboard.display == g_Display) if (ev->keyboard.unichar > 0 && ev->keyboard.unichar < 0x10000) io.AddInputCharacter((unsigned short)ev->keyboard.unichar); return true; case ALLEGRO_EVENT_KEY_DOWN: case ALLEGRO_EVENT_KEY_UP: if (ev->keyboard.display == g_Display) io.KeysDown[ev->keyboard.keycode] = (ev->type == ALLEGRO_EVENT_KEY_DOWN); return true; } return false; } static void ImGui_ImplAllegro5_UpdateMouseCursor() { ImGuiIO& io = ImGui::GetIO(); if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange) return; ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor(); if (io.MouseDrawCursor || imgui_cursor == ImGuiMouseCursor_None) { // Hide OS mouse cursor if imgui is drawing it or if it wants no cursor al_set_mouse_cursor(g_Display, g_MouseCursorInvisible); } else { ALLEGRO_SYSTEM_MOUSE_CURSOR cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_DEFAULT; switch (imgui_cursor) { case ImGuiMouseCursor_TextInput: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_EDIT; break; case ImGuiMouseCursor_ResizeAll: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_MOVE; break; case ImGuiMouseCursor_ResizeNS: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_N; break; case ImGuiMouseCursor_ResizeEW: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_E; break; case ImGuiMouseCursor_ResizeNESW: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NE; break; case ImGuiMouseCursor_ResizeNWSE: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NW; break; } al_set_system_mouse_cursor(g_Display, cursor_id); } } void ImGui_ImplAllegro5_NewFrame() { if (!g_Texture) ImGui_ImplAllegro5_CreateDeviceObjects(); ImGuiIO &io = ImGui::GetIO(); // Setup display size (every frame to accommodate for window resizing) int w, h; w = al_get_display_width(g_Display); h = al_get_display_height(g_Display); io.DisplaySize = ImVec2((float)w, (float)h); // Setup time step double current_time = al_get_time(); io.DeltaTime = g_Time > 0.0 ? (float)(current_time - g_Time) : (float)(1.0f/60.0f); g_Time = current_time; // Setup inputs ALLEGRO_KEYBOARD_STATE keys; al_get_keyboard_state(&keys); io.KeyCtrl = al_key_down(&keys, ALLEGRO_KEY_LCTRL) || al_key_down(&keys, ALLEGRO_KEY_RCTRL); io.KeyShift = al_key_down(&keys, ALLEGRO_KEY_LSHIFT) || al_key_down(&keys, ALLEGRO_KEY_RSHIFT); io.KeyAlt = al_key_down(&keys, ALLEGRO_KEY_ALT) || al_key_down(&keys, ALLEGRO_KEY_ALTGR); io.KeySuper = al_key_down(&keys, ALLEGRO_KEY_LWIN) || al_key_down(&keys, ALLEGRO_KEY_RWIN); ALLEGRO_MOUSE_STATE mouse; if (keys.display == g_Display) { al_get_mouse_state(&mouse); io.MousePos = ImVec2((float)mouse.x, (float)mouse.y); } else { io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX); } al_get_mouse_state(&mouse); io.MouseDown[0] = mouse.buttons & (1 << 0); io.MouseDown[1] = mouse.buttons & (1 << 1); io.MouseDown[2] = mouse.buttons & (1 << 2); ImGui_ImplAllegro5_UpdateMouseCursor(); } /a> 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740