mirror of
https://github.com/tildearrow/furnace.git
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605 lines
29 KiB
C++
605 lines
29 KiB
C++
// dear imgui: Renderer + Platform Backend for Allegro 5
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// (Info: Allegro 5 is a cross-platform general purpose library for handling windows, inputs, graphics, etc.)
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// Implemented features:
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// [X] Renderer: User texture binding. Use 'ALLEGRO_BITMAP*' as ImTextureID. Read the FAQ about ImTextureID!
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// [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy ALLEGRO_KEY_* values will also be supported unless IMGUI_DISABLE_OBSOLETE_KEYIO is set]
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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 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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// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
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// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
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// Read online: https://github.com/ocornut/imgui/tree/master/docs
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// CHANGELOG
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// (minor and older changes stripped away, please see git history for details)
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// 2022-11-30: Renderer: Restoring using al_draw_indexed_prim() when Allegro version is >= 5.2.5.
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// 2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
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// 2022-09-26: Inputs: Renamed ImGuiKey_ModXXX introduced in 1.87 to ImGuiMod_XXX (old names still supported).
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// 2022-01-26: Inputs: replaced short-lived io.AddKeyModsEvent() (added two weeks ago) with io.AddKeyEvent() using ImGuiKey_ModXXX flags. Sorry for the confusion.
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// 2022-01-17: Inputs: calling new io.AddMousePosEvent(), io.AddMouseButtonEvent(), io.AddMouseWheelEvent() API (1.87+).
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// 2022-01-17: Inputs: always calling io.AddKeyModsEvent() next and before key event (not in NewFrame) to fix input queue with very low framerates.
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// 2022-01-10: Inputs: calling new io.AddKeyEvent(), io.AddKeyModsEvent() + io.SetKeyEventNativeData() API (1.87+). Support for full ImGuiKey range.
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// 2021-12-08: Renderer: Fixed mishandling of the the ImDrawCmd::IdxOffset field! This is an old bug but it never had an effect until some internal rendering changes in 1.86.
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// 2021-08-17: Calling io.AddFocusEvent() on ALLEGRO_EVENT_DISPLAY_SWITCH_OUT/ALLEGRO_EVENT_DISPLAY_SWITCH_IN events.
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// 2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX).
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// 2021-05-19: Renderer: Replaced direct access to ImDrawCmd::TextureId with a call to ImDrawCmd::GetTexID(). (will become a requirement)
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// 2021-02-18: Change blending equation to preserve alpha in output buffer.
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// 2020-08-10: Inputs: Fixed horizontal mouse wheel direction.
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// 2019-12-05: Inputs: Added support for ImGuiMouseCursor_NotAllowed mouse cursor.
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// 2019-07-21: Inputs: Added mapping for ImGuiKey_KeyPadEnter.
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// 2019-05-11: Inputs: Don't filter character value from ALLEGRO_EVENT_KEY_CHAR before calling AddInputCharacter().
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// 2019-04-30: Renderer: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
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// 2018-11-30: Platform: Added touchscreen support.
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// 2018-11-30: Misc: Setting up io.BackendPlatformName/io.BackendRendererName so they can be displayed in the About Window.
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// 2018-06-13: Platform: Added clipboard support (from Allegro 5.1.12).
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// 2018-06-13: Renderer: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
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// 2018-06-13: Renderer: Stopped using al_draw_indexed_prim() as it is buggy in Allegro's DX9 backend.
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// 2018-06-13: Renderer: Backup/restore transform and clipping rectangle.
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// 2018-06-11: Misc: Setup io.BackendFlags ImGuiBackendFlags_HasMouseCursors flag + honor ImGuiConfigFlags_NoMouseCursorChange flag.
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// 2018-04-18: Misc: Renamed file from imgui_impl_a5.cpp to imgui_impl_allegro5.cpp.
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// 2018-04-18: Misc: Added support for 32-bit vertex indices to avoid conversion at runtime. Added imconfig_allegro5.h to enforce 32-bit indices when included from imgui.h.
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// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplAllegro5_RenderDrawData() in the .h file so you can call it yourself.
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// 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
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// 2018-02-06: Inputs: Added mapping for ImGuiKey_Space.
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#include <stdint.h> // uint64_t
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#include <cstring> // memcpy
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#include "imgui.h"
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#include "imgui_impl_allegro5.h"
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// Allegro
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#include <allegro5/allegro.h>
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#include <allegro5/allegro_primitives.h>
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#ifdef _WIN32
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#include <allegro5/allegro_windows.h>
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#endif
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#define ALLEGRO_HAS_CLIPBOARD (ALLEGRO_VERSION_INT >= ((5 << 24) | (1 << 16) | (12 << 8))) // Clipboard only supported from Allegro 5.1.12
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#define ALLEGRO_HAS_DRAW_INDEXED_PRIM (ALLEGRO_VERSION_INT >= ((5 << 24) | (2 << 16) | ( 5 << 8))) // DX9 implementation of al_draw_indexed_prim() got fixed in Allegro 5.2.5
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// Visual Studio warnings
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#ifdef _MSC_VER
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#pragma warning (disable: 4127) // condition expression is constant
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#endif
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struct ImDrawVertAllegro
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{
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ImVec2 pos;
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ImVec2 uv;
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ALLEGRO_COLOR col;
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};
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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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// FIXME-OPT: Consider inlining al_map_rgba()?
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// see https://github.com/liballeg/allegro5/blob/master/src/pixels.c#L554
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// and https://github.com/liballeg/allegro5/blob/master/include/allegro5/internal/aintern_pixels.h
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#define DRAW_VERT_IMGUI_TO_ALLEGRO(DST, SRC) { (DST)->pos = (SRC)->pos; (DST)->uv = (SRC)->uv; unsigned char* c = (unsigned char*)&(SRC)->col; (DST)->col = al_map_rgba(c[0], c[1], c[2], c[3]); }
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// Allegro Data
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struct ImGui_ImplAllegro5_Data
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{
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ALLEGRO_DISPLAY* Display;
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ALLEGRO_BITMAP* Texture;
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double Time;
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ALLEGRO_MOUSE_CURSOR* MouseCursorInvisible;
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ALLEGRO_VERTEX_DECL* VertexDecl;
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char* ClipboardTextData;
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ImVector<ImDrawVertAllegro> BufVertices;
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ImVector<int> BufIndices;
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ImGui_ImplAllegro5_Data() { memset((void*)this, 0, sizeof(*this)); }
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};
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// Backend data stored in io.BackendPlatformUserData to allow support for multiple Dear ImGui contexts
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// It is STRONGLY preferred that you use docking branch with multi-viewports (== single Dear ImGui context + multiple windows) instead of multiple Dear ImGui contexts.
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// FIXME: multi-context support is not well tested and probably dysfunctional in this backend.
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static ImGui_ImplAllegro5_Data* ImGui_ImplAllegro5_GetBackendData() { return ImGui::GetCurrentContext() ? (ImGui_ImplAllegro5_Data*)ImGui::GetIO().BackendPlatformUserData : nullptr; }
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static void ImGui_ImplAllegro5_SetupRenderState(ImDrawData* draw_data)
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{
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// Setup blending
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al_set_separate_blender(ALLEGRO_ADD, ALLEGRO_ALPHA, ALLEGRO_INVERSE_ALPHA, ALLEGRO_ADD, ALLEGRO_ONE, ALLEGRO_INVERSE_ALPHA);
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// Setup orthographic projection matrix
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// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right).
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{
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float L = draw_data->DisplayPos.x;
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float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
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float T = draw_data->DisplayPos.y;
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float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
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ALLEGRO_TRANSFORM transform;
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al_identity_transform(&transform);
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al_use_transform(&transform);
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al_orthographic_transform(&transform, L, T, 1.0f, R, B, -1.0f);
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al_use_projection_transform(&transform);
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}
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}
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// Render function.
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void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
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{
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// Avoid rendering when minimized
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if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f)
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return;
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// Backup Allegro state that will be modified
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ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
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ALLEGRO_TRANSFORM last_transform = *al_get_current_transform();
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ALLEGRO_TRANSFORM last_projection_transform = *al_get_current_projection_transform();
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int last_clip_x, last_clip_y, last_clip_w, last_clip_h;
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al_get_clipping_rectangle(&last_clip_x, &last_clip_y, &last_clip_w, &last_clip_h);
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int last_blender_op, last_blender_src, last_blender_dst;
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al_get_blender(&last_blender_op, &last_blender_src, &last_blender_dst);
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// Setup desired render state
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ImGui_ImplAllegro5_SetupRenderState(draw_data);
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// Render command lists
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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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ImVector<ImDrawVertAllegro>& vertices = bd->BufVertices;
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#if ALLEGRO_HAS_DRAW_INDEXED_PRIM
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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[i];
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ImDrawVertAllegro* dst_v = &vertices[i];
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DRAW_VERT_IMGUI_TO_ALLEGRO(dst_v, src_v);
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}
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const int* indices = nullptr;
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if (sizeof(ImDrawIdx) == 2)
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{
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// FIXME-OPT: Allegro doesn't support 16-bit indices.
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// You can '#define ImDrawIdx int' in imconfig.h to request Dear ImGui to output 32-bit indices.
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// Otherwise, we convert them from 16-bit to 32-bit at runtime here, which works perfectly but is a little wasteful.
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bd->BufIndices.resize(cmd_list->IdxBuffer.Size);
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for (int i = 0; i < cmd_list->IdxBuffer.Size; ++i)
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bd->BufIndices[i] = (int)cmd_list->IdxBuffer.Data[i];
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indices = bd->BufIndices.Data;
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}
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else if (sizeof(ImDrawIdx) == 4)
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{
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indices = (const int*)cmd_list->IdxBuffer.Data;
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}
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#else
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// Allegro's implementation of al_draw_indexed_prim() for DX9 was broken until 5.2.5. Unindex buffers ourselves while converting vertex format.
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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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{
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const ImDrawVert* src_v = &cmd_list->VtxBuffer[cmd_list->IdxBuffer[i]];
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ImDrawVertAllegro* dst_v = &vertices[i];
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DRAW_VERT_IMGUI_TO_ALLEGRO(dst_v, src_v);
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}
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#endif
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// Render command lists
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ImVec2 clip_off = draw_data->DisplayPos;
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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)
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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_ImplAllegro5_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, 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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#if ALLEGRO_HAS_DRAW_INDEXED_PRIM
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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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#else
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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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#endif
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}
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}
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}
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// Restore modified Allegro state
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al_set_blender(last_blender_op, last_blender_src, last_blender_dst);
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al_set_clipping_rectangle(last_clip_x, last_clip_y, last_clip_w, last_clip_h);
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al_use_transform(&last_transform);
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al_use_projection_transform(&last_projection_transform);
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}
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bool ImGui_ImplAllegro5_CreateDeviceObjects()
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{
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// Build texture atlas
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ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
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ImGuiIO& io = ImGui::GetIO();
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unsigned char* pixels;
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int width, height;
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io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
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// Create texture
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// (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
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int flags = al_get_new_bitmap_flags();
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int fmt = al_get_new_bitmap_format();
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al_set_new_bitmap_flags(ALLEGRO_MEMORY_BITMAP | ALLEGRO_MIN_LINEAR | ALLEGRO_MAG_LINEAR);
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al_set_new_bitmap_format(ALLEGRO_PIXEL_FORMAT_ABGR_8888_LE);
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ALLEGRO_BITMAP* img = al_create_bitmap(width, height);
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al_set_new_bitmap_flags(flags);
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al_set_new_bitmap_format(fmt);
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if (!img)
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return false;
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ALLEGRO_LOCKED_REGION* locked_img = al_lock_bitmap(img, al_get_bitmap_format(img), ALLEGRO_LOCK_WRITEONLY);
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if (!locked_img)
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{
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al_destroy_bitmap(img);
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return false;
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}
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memcpy(locked_img->data, pixels, sizeof(int) * width * height);
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al_unlock_bitmap(img);
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// Convert software texture to hardware texture.
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ALLEGRO_BITMAP* cloned_img = al_clone_bitmap(img);
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al_destroy_bitmap(img);
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if (!cloned_img)
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return false;
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// Store our identifier
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io.Fonts->SetTexID((ImTextureID)(intptr_t)cloned_img);
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bd->Texture = cloned_img;
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// Create an invisible mouse cursor
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// Because al_hide_mouse_cursor() seems to mess up with the actual inputs..
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ALLEGRO_BITMAP* mouse_cursor = al_create_bitmap(8, 8);
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bd->MouseCursorInvisible = al_create_mouse_cursor(mouse_cursor, 0, 0);
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al_destroy_bitmap(mouse_cursor);
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return true;
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}
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void ImGui_ImplAllegro5_InvalidateDeviceObjects()
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{
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ImGuiIO& io = ImGui::GetIO();
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ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
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if (bd->Texture)
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{
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io.Fonts->SetTexID(0);
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al_destroy_bitmap(bd->Texture);
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bd->Texture = nullptr;
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}
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if (bd->MouseCursorInvisible)
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{
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al_destroy_mouse_cursor(bd->MouseCursorInvisible);
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bd->MouseCursorInvisible = nullptr;
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}
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}
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#if ALLEGRO_HAS_CLIPBOARD
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static const char* ImGui_ImplAllegro5_GetClipboardText(void*)
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{
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ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
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if (bd->ClipboardTextData)
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al_free(bd->ClipboardTextData);
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bd->ClipboardTextData = al_get_clipboard_text(bd->Display);
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return bd->ClipboardTextData;
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}
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static void ImGui_ImplAllegro5_SetClipboardText(void*, const char* text)
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{
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ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
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al_set_clipboard_text(bd->Display, text);
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}
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#endif
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static ImGuiKey ImGui_ImplAllegro5_KeyCodeToImGuiKey(int key_code)
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{
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switch (key_code)
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{
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case ALLEGRO_KEY_TAB: return ImGuiKey_Tab;
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case ALLEGRO_KEY_LEFT: return ImGuiKey_LeftArrow;
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case ALLEGRO_KEY_RIGHT: return ImGuiKey_RightArrow;
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case ALLEGRO_KEY_UP: return ImGuiKey_UpArrow;
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case ALLEGRO_KEY_DOWN: return ImGuiKey_DownArrow;
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case ALLEGRO_KEY_PGUP: return ImGuiKey_PageUp;
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case ALLEGRO_KEY_PGDN: return ImGuiKey_PageDown;
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case ALLEGRO_KEY_HOME: return ImGuiKey_Home;
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case ALLEGRO_KEY_END: return ImGuiKey_End;
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case ALLEGRO_KEY_INSERT: return ImGuiKey_Insert;
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case ALLEGRO_KEY_DELETE: return ImGuiKey_Delete;
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case ALLEGRO_KEY_BACKSPACE: return ImGuiKey_Backspace;
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case ALLEGRO_KEY_SPACE: return ImGuiKey_Space;
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case ALLEGRO_KEY_ENTER: return ImGuiKey_Enter;
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case ALLEGRO_KEY_ESCAPE: return ImGuiKey_Escape;
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case ALLEGRO_KEY_QUOTE: return ImGuiKey_Apostrophe;
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case ALLEGRO_KEY_COMMA: return ImGuiKey_Comma;
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case ALLEGRO_KEY_MINUS: return ImGuiKey_Minus;
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case ALLEGRO_KEY_FULLSTOP: return ImGuiKey_Period;
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case ALLEGRO_KEY_SLASH: return ImGuiKey_Slash;
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case ALLEGRO_KEY_SEMICOLON: return ImGuiKey_Semicolon;
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case ALLEGRO_KEY_EQUALS: return ImGuiKey_Equal;
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case ALLEGRO_KEY_OPENBRACE: return ImGuiKey_LeftBracket;
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case ALLEGRO_KEY_BACKSLASH: return ImGuiKey_Backslash;
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case ALLEGRO_KEY_CLOSEBRACE: return ImGuiKey_RightBracket;
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case ALLEGRO_KEY_TILDE: return ImGuiKey_GraveAccent;
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case ALLEGRO_KEY_CAPSLOCK: return ImGuiKey_CapsLock;
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case ALLEGRO_KEY_SCROLLLOCK: return ImGuiKey_ScrollLock;
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case ALLEGRO_KEY_NUMLOCK: return ImGuiKey_NumLock;
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case ALLEGRO_KEY_PRINTSCREEN: return ImGuiKey_PrintScreen;
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case ALLEGRO_KEY_PAUSE: return ImGuiKey_Pause;
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case ALLEGRO_KEY_PAD_0: return ImGuiKey_Keypad0;
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case ALLEGRO_KEY_PAD_1: return ImGuiKey_Keypad1;
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case ALLEGRO_KEY_PAD_2: return ImGuiKey_Keypad2;
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case ALLEGRO_KEY_PAD_3: return ImGuiKey_Keypad3;
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case ALLEGRO_KEY_PAD_4: return ImGuiKey_Keypad4;
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case ALLEGRO_KEY_PAD_5: return ImGuiKey_Keypad5;
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case ALLEGRO_KEY_PAD_6: return ImGuiKey_Keypad6;
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case ALLEGRO_KEY_PAD_7: return ImGuiKey_Keypad7;
|
|
case ALLEGRO_KEY_PAD_8: return ImGuiKey_Keypad8;
|
|
case ALLEGRO_KEY_PAD_9: return ImGuiKey_Keypad9;
|
|
case ALLEGRO_KEY_PAD_DELETE: return ImGuiKey_KeypadDecimal;
|
|
case ALLEGRO_KEY_PAD_SLASH: return ImGuiKey_KeypadDivide;
|
|
case ALLEGRO_KEY_PAD_ASTERISK: return ImGuiKey_KeypadMultiply;
|
|
case ALLEGRO_KEY_PAD_MINUS: return ImGuiKey_KeypadSubtract;
|
|
case ALLEGRO_KEY_PAD_PLUS: return ImGuiKey_KeypadAdd;
|
|
case ALLEGRO_KEY_PAD_ENTER: return ImGuiKey_KeypadEnter;
|
|
case ALLEGRO_KEY_PAD_EQUALS: return ImGuiKey_KeypadEqual;
|
|
case ALLEGRO_KEY_LCTRL: return ImGuiKey_LeftCtrl;
|
|
case ALLEGRO_KEY_LSHIFT: return ImGuiKey_LeftShift;
|
|
case ALLEGRO_KEY_ALT: return ImGuiKey_LeftAlt;
|
|
case ALLEGRO_KEY_LWIN: return ImGuiKey_LeftSuper;
|
|
case ALLEGRO_KEY_RCTRL: return ImGuiKey_RightCtrl;
|
|
case ALLEGRO_KEY_RSHIFT: return ImGuiKey_RightShift;
|
|
case ALLEGRO_KEY_ALTGR: return ImGuiKey_RightAlt;
|
|
case ALLEGRO_KEY_RWIN: return ImGuiKey_RightSuper;
|
|
case ALLEGRO_KEY_MENU: return ImGuiKey_Menu;
|
|
case ALLEGRO_KEY_0: return ImGuiKey_0;
|
|
case ALLEGRO_KEY_1: return ImGuiKey_1;
|
|
case ALLEGRO_KEY_2: return ImGuiKey_2;
|
|
case ALLEGRO_KEY_3: return ImGuiKey_3;
|
|
case ALLEGRO_KEY_4: return ImGuiKey_4;
|
|
case ALLEGRO_KEY_5: return ImGuiKey_5;
|
|
case ALLEGRO_KEY_6: return ImGuiKey_6;
|
|
case ALLEGRO_KEY_7: return ImGuiKey_7;
|
|
case ALLEGRO_KEY_8: return ImGuiKey_8;
|
|
case ALLEGRO_KEY_9: return ImGuiKey_9;
|
|
case ALLEGRO_KEY_A: return ImGuiKey_A;
|
|
case ALLEGRO_KEY_B: return ImGuiKey_B;
|
|
case ALLEGRO_KEY_C: return ImGuiKey_C;
|
|
case ALLEGRO_KEY_D: return ImGuiKey_D;
|
|
case ALLEGRO_KEY_E: return ImGuiKey_E;
|
|
case ALLEGRO_KEY_F: return ImGuiKey_F;
|
|
case ALLEGRO_KEY_G: return ImGuiKey_G;
|
|
case ALLEGRO_KEY_H: return ImGuiKey_H;
|
|
case ALLEGRO_KEY_I: return ImGuiKey_I;
|
|
case ALLEGRO_KEY_J: return ImGuiKey_J;
|
|
case ALLEGRO_KEY_K: return ImGuiKey_K;
|
|
case ALLEGRO_KEY_L: return ImGuiKey_L;
|
|
case ALLEGRO_KEY_M: return ImGuiKey_M;
|
|
case ALLEGRO_KEY_N: return ImGuiKey_N;
|
|
case ALLEGRO_KEY_O: return ImGuiKey_O;
|
|
case ALLEGRO_KEY_P: return ImGuiKey_P;
|
|
case ALLEGRO_KEY_Q: return ImGuiKey_Q;
|
|
case ALLEGRO_KEY_R: return ImGuiKey_R;
|
|
case ALLEGRO_KEY_S: return ImGuiKey_S;
|
|
case ALLEGRO_KEY_T: return ImGuiKey_T;
|
|
case ALLEGRO_KEY_U: return ImGuiKey_U;
|
|
case ALLEGRO_KEY_V: return ImGuiKey_V;
|
|
case ALLEGRO_KEY_W: return ImGuiKey_W;
|
|
case ALLEGRO_KEY_X: return ImGuiKey_X;
|
|
case ALLEGRO_KEY_Y: return ImGuiKey_Y;
|
|
case ALLEGRO_KEY_Z: return ImGuiKey_Z;
|
|
case ALLEGRO_KEY_F1: return ImGuiKey_F1;
|
|
case ALLEGRO_KEY_F2: return ImGuiKey_F2;
|
|
case ALLEGRO_KEY_F3: return ImGuiKey_F3;
|
|
case ALLEGRO_KEY_F4: return ImGuiKey_F4;
|
|
case ALLEGRO_KEY_F5: return ImGuiKey_F5;
|
|
case ALLEGRO_KEY_F6: return ImGuiKey_F6;
|
|
case ALLEGRO_KEY_F7: return ImGuiKey_F7;
|
|
case ALLEGRO_KEY_F8: return ImGuiKey_F8;
|
|
case ALLEGRO_KEY_F9: return ImGuiKey_F9;
|
|
case ALLEGRO_KEY_F10: return ImGuiKey_F10;
|
|
case ALLEGRO_KEY_F11: return ImGuiKey_F11;
|
|
case ALLEGRO_KEY_F12: return ImGuiKey_F12;
|
|
default: return ImGuiKey_None;
|
|
}
|
|
}
|
|
|
|
bool ImGui_ImplAllegro5_Init(ALLEGRO_DISPLAY* display)
|
|
{
|
|
ImGuiIO& io = ImGui::GetIO();
|
|
IM_ASSERT(io.BackendPlatformUserData == nullptr && "Already initialized a platform backend!");
|
|
|
|
// Setup backend capabilities flags
|
|
ImGui_ImplAllegro5_Data* bd = IM_NEW(ImGui_ImplAllegro5_Data)();
|
|
io.BackendPlatformUserData = (void*)bd;
|
|
io.BackendPlatformName = io.BackendRendererName = "imgui_impl_allegro5";
|
|
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
|
|
|
|
bd->Display = display;
|
|
|
|
// Create custom vertex declaration.
|
|
// Unfortunately Allegro doesn't support 32-bit 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 }
|
|
};
|
|
bd->VertexDecl = al_create_vertex_decl(elems, sizeof(ImDrawVertAllegro));
|
|
|
|
#if ALLEGRO_HAS_CLIPBOARD
|
|
io.SetClipboardTextFn = ImGui_ImplAllegro5_SetClipboardText;
|
|
io.GetClipboardTextFn = ImGui_ImplAllegro5_GetClipboardText;
|
|
io.ClipboardUserData = nullptr;
|
|
#endif
|
|
|
|
return true;
|
|
}
|
|
|
|
void ImGui_ImplAllegro5_Shutdown()
|
|
{
|
|
ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
|
|
IM_ASSERT(bd != nullptr && "No platform backend to shutdown, or already shutdown?");
|
|
ImGuiIO& io = ImGui::GetIO();
|
|
|
|
ImGui_ImplAllegro5_InvalidateDeviceObjects();
|
|
if (bd->VertexDecl)
|
|
al_destroy_vertex_decl(bd->VertexDecl);
|
|
if (bd->ClipboardTextData)
|
|
al_free(bd->ClipboardTextData);
|
|
|
|
io.BackendPlatformName = io.BackendRendererName = nullptr;
|
|
io.BackendPlatformUserData = nullptr;
|
|
io.BackendFlags &= ~ImGuiBackendFlags_HasMouseCursors;
|
|
IM_DELETE(bd);
|
|
}
|
|
|
|
// ev->keyboard.modifiers seems always zero so using that...
|
|
static void ImGui_ImplAllegro5_UpdateKeyModifiers()
|
|
{
|
|
ImGuiIO& io = ImGui::GetIO();
|
|
ALLEGRO_KEYBOARD_STATE keys;
|
|
al_get_keyboard_state(&keys);
|
|
io.AddKeyEvent(ImGuiMod_Ctrl, al_key_down(&keys, ALLEGRO_KEY_LCTRL) || al_key_down(&keys, ALLEGRO_KEY_RCTRL));
|
|
io.AddKeyEvent(ImGuiMod_Shift, al_key_down(&keys, ALLEGRO_KEY_LSHIFT) || al_key_down(&keys, ALLEGRO_KEY_RSHIFT));
|
|
io.AddKeyEvent(ImGuiMod_Alt, al_key_down(&keys, ALLEGRO_KEY_ALT) || al_key_down(&keys, ALLEGRO_KEY_ALTGR));
|
|
io.AddKeyEvent(ImGuiMod_Super, al_key_down(&keys, ALLEGRO_KEY_LWIN) || al_key_down(&keys, ALLEGRO_KEY_RWIN));
|
|
}
|
|
|
|
// 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, or clear/overwrite your copy of the mouse data.
|
|
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
|
|
// 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();
|
|
ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
|
|
|
|
switch (ev->type)
|
|
{
|
|
case ALLEGRO_EVENT_MOUSE_AXES:
|
|
if (ev->mouse.display == bd->Display)
|
|
{
|
|
io.AddMousePosEvent(ev->mouse.x, ev->mouse.y);
|
|
io.AddMouseWheelEvent(-ev->mouse.dw, ev->mouse.dz);
|
|
}
|
|
return true;
|
|
case ALLEGRO_EVENT_MOUSE_BUTTON_DOWN:
|
|
case ALLEGRO_EVENT_MOUSE_BUTTON_UP:
|
|
if (ev->mouse.display == bd->Display && ev->mouse.button > 0 && ev->mouse.button <= 5)
|
|
io.AddMouseButtonEvent(ev->mouse.button - 1, ev->type == ALLEGRO_EVENT_MOUSE_BUTTON_DOWN);
|
|
return true;
|
|
case ALLEGRO_EVENT_TOUCH_MOVE:
|
|
if (ev->touch.display == bd->Display)
|
|
io.AddMousePosEvent(ev->touch.x, ev->touch.y);
|
|
return true;
|
|
case ALLEGRO_EVENT_TOUCH_BEGIN:
|
|
case ALLEGRO_EVENT_TOUCH_END:
|
|
case ALLEGRO_EVENT_TOUCH_CANCEL:
|
|
if (ev->touch.display == bd->Display && ev->touch.primary)
|
|
io.AddMouseButtonEvent(0, ev->type == ALLEGRO_EVENT_TOUCH_BEGIN);
|
|
return true;
|
|
case ALLEGRO_EVENT_MOUSE_LEAVE_DISPLAY:
|
|
if (ev->mouse.display == bd->Display)
|
|
io.AddMousePosEvent(-FLT_MAX, -FLT_MAX);
|
|
return true;
|
|
case ALLEGRO_EVENT_KEY_CHAR:
|
|
if (ev->keyboard.display == bd->Display)
|
|
if (ev->keyboard.unichar != 0)
|
|
io.AddInputCharacter((unsigned int)ev->keyboard.unichar);
|
|
return true;
|
|
case ALLEGRO_EVENT_KEY_DOWN:
|
|
case ALLEGRO_EVENT_KEY_UP:
|
|
if (ev->keyboard.display == bd->Display)
|
|
{
|
|
ImGui_ImplAllegro5_UpdateKeyModifiers();
|
|
ImGuiKey key = ImGui_ImplAllegro5_KeyCodeToImGuiKey(ev->keyboard.keycode);
|
|
io.AddKeyEvent(key, (ev->type == ALLEGRO_EVENT_KEY_DOWN));
|
|
io.SetKeyEventNativeData(key, ev->keyboard.keycode, -1); // To support legacy indexing (<1.87 user code)
|
|
}
|
|
return true;
|
|
case ALLEGRO_EVENT_DISPLAY_SWITCH_OUT:
|
|
if (ev->display.source == bd->Display)
|
|
io.AddFocusEvent(false);
|
|
return true;
|
|
case ALLEGRO_EVENT_DISPLAY_SWITCH_IN:
|
|
if (ev->display.source == bd->Display)
|
|
{
|
|
io.AddFocusEvent(true);
|
|
#if defined(ALLEGRO_UNSTABLE)
|
|
al_clear_keyboard_state(bd->Display);
|
|
#endif
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static void ImGui_ImplAllegro5_UpdateMouseCursor()
|
|
{
|
|
ImGuiIO& io = ImGui::GetIO();
|
|
if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange)
|
|
return;
|
|
|
|
ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
|
|
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(bd->Display, bd->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;
|
|
case ImGuiMouseCursor_NotAllowed: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_UNAVAILABLE; break;
|
|
}
|
|
al_set_system_mouse_cursor(bd->Display, cursor_id);
|
|
}
|
|
}
|
|
|
|
void ImGui_ImplAllegro5_NewFrame()
|
|
{
|
|
ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
|
|
IM_ASSERT(bd != nullptr && "Did you call ImGui_ImplAllegro5_Init()?");
|
|
|
|
if (!bd->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(bd->Display);
|
|
h = al_get_display_height(bd->Display);
|
|
io.DisplaySize = ImVec2((float)w, (float)h);
|
|
|
|
// Setup time step
|
|
double current_time = al_get_time();
|
|
io.DeltaTime = bd->Time > 0.0 ? (float)(current_time - bd->Time) : (float)(1.0f / 60.0f);
|
|
bd->Time = current_time;
|
|
|
|
// Setup mouse cursor shape
|
|
ImGui_ImplAllegro5_UpdateMouseCursor();
|
|
}
|