summaryrefslogtreecommitdiff
path: root/imgui-1.92.1/backends/imgui_impl_allegro5.cpp
diff options
context:
space:
mode:
authorAldrik Ramaekers <aldrikboy@gmail.com>2025-08-03 19:22:36 +0200
committerAldrik Ramaekers <aldrikboy@gmail.com>2025-08-03 19:22:36 +0200
commit853bbb3752a5fa2f58ef456ffb6e3a552e13cb11 (patch)
treece49a533f82a42a65fa6a4771a7b8fbfe33798cf /imgui-1.92.1/backends/imgui_impl_allegro5.cpp
initial commit
Diffstat (limited to 'imgui-1.92.1/backends/imgui_impl_allegro5.cpp')
-rw-r--r--imgui-1.92.1/backends/imgui_impl_allegro5.cpp670
1 files changed, 670 insertions, 0 deletions
diff --git a/imgui-1.92.1/backends/imgui_impl_allegro5.cpp b/imgui-1.92.1/backends/imgui_impl_allegro5.cpp
new file mode 100644
index 0000000..5cbb893
--- /dev/null
+++ b/imgui-1.92.1/backends/imgui_impl_allegro5.cpp
@@ -0,0 +1,670 @@
+// dear imgui: Renderer + Platform Backend 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 texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
+// [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
+// [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 are obsolete since 1.87 and not supported since 1.91.5]
+// [X] Platform: Clipboard support (from Allegro 5.1.12).
+// [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
+// Missing features or Issues:
+// [ ] Renderer: The renderer is suboptimal as we need to convert vertices manually.
+// [ ] Platform: Missing gamepad support.
+
+// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
+// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
+// Learn about Dear ImGui:
+// - FAQ https://dearimgui.com/faq
+// - Getting Started https://dearimgui.com/getting-started
+// - Documentation https://dearimgui.com/docs (same as your local docs/ folder).
+// - Introduction, links and more at the top of imgui.cpp
+
+// CHANGELOG
+// (minor and older changes stripped away, please see git history for details)
+// 2025-07-07: Fixed texture update broken on some platforms where ALLEGRO_LOCK_WRITEONLY needed all texels to be rewritten.
+// 2025-06-11: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. Removed ImGui_ImplSDLGPU3_CreateFontsTexture() and ImGui_ImplSDLGPU3_DestroyFontsTexture().
+// 2025-02-18: Added ImGuiMouseCursor_Wait and ImGuiMouseCursor_Progress mouse cursor support.
+// 2025-01-06: Avoid calling al_set_mouse_cursor() repeatedly since it appears to leak on on X11 (#8256).
+// 2024-08-22: moved some OS/backend related function pointers from ImGuiIO to ImGuiPlatformIO:
+// - io.GetClipboardTextFn -> platform_io.Platform_GetClipboardTextFn
+// - io.SetClipboardTextFn -> platform_io.Platform_SetClipboardTextFn
+// 2022-11-30: Renderer: Restoring using al_draw_indexed_prim() when Allegro version is >= 5.2.5.
+// 2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
+// 2022-09-26: Inputs: Renamed ImGuiKey_ModXXX introduced in 1.87 to ImGuiMod_XXX (old names still supported).
+// 2022-01-26: Inputs: replaced short-lived io.AddKeyModsEvent() (added two weeks ago) with io.AddKeyEvent() using ImGuiKey_ModXXX flags. Sorry for the confusion.
+// 2022-01-17: Inputs: calling new io.AddMousePosEvent(), io.AddMouseButtonEvent(), io.AddMouseWheelEvent() API (1.87+).
+// 2022-01-17: Inputs: always calling io.AddKeyModsEvent() next and before key event (not in NewFrame) to fix input queue with very low framerates.
+// 2022-01-10: Inputs: calling new io.AddKeyEvent(), io.AddKeyModsEvent() + io.SetKeyEventNativeData() API (1.87+). Support for full ImGuiKey range.
+// 2021-12-08: Renderer: Fixed mishandling of the ImDrawCmd::IdxOffset field! This is an old bug but it never had an effect until some internal rendering changes in 1.86.
+// 2021-08-17: Calling io.AddFocusEvent() on ALLEGRO_EVENT_DISPLAY_SWITCH_OUT/ALLEGRO_EVENT_DISPLAY_SWITCH_IN events.
+// 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).
+// 2021-05-19: Renderer: Replaced direct access to ImDrawCmd::TextureId with a call to ImDrawCmd::GetTexID(). (will become a requirement)
+// 2021-02-18: Change blending equation to preserve alpha in output buffer.
+// 2020-08-10: Inputs: Fixed horizontal mouse wheel direction.
+// 2019-12-05: Inputs: Added support for ImGuiMouseCursor_NotAllowed mouse cursor.
+// 2019-07-21: Inputs: Added mapping for ImGuiKey_KeyPadEnter.
+// 2019-05-11: Inputs: Don't filter character value from ALLEGRO_EVENT_KEY_CHAR before calling AddInputCharacter().
+// 2019-04-30: Renderer: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
+// 2018-11-30: Platform: Added touchscreen support.
+// 2018-11-30: Misc: Setting up io.BackendPlatformName/io.BackendRendererName so they can be displayed in the About Window.
+// 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: Stopped using al_draw_indexed_prim() as it is buggy in Allegro's DX9 backend.
+// 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-bit 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 "imgui.h"
+#ifndef IMGUI_DISABLE
+#include "imgui_impl_allegro5.h"
+#include <stdint.h> // uint64_t
+#include <cstring> // memcpy
+
+// Allegro
+#include <allegro5/allegro.h>
+#include <allegro5/allegro_primitives.h>
+#ifdef _WIN32
+#include <allegro5/allegro_windows.h>
+#endif
+#define ALLEGRO_HAS_CLIPBOARD ((ALLEGRO_VERSION_INT & ~ALLEGRO_UNSTABLE_BIT) >= ((5 << 24) | (1 << 16) | (12 << 8))) // Clipboard only supported from Allegro 5.1.12
+#define ALLEGRO_HAS_DRAW_INDEXED_PRIM ((ALLEGRO_VERSION_INT & ~ALLEGRO_UNSTABLE_BIT) >= ((5 << 24) | (2 << 16) | ( 5 << 8))) // DX9 implementation of al_draw_indexed_prim() got fixed in Allegro 5.2.5
+
+// Visual Studio warnings
+#ifdef _MSC_VER
+#pragma warning (disable: 4127) // condition expression is constant
+#endif
+
+struct ImDrawVertAllegro
+{
+ ImVec2 pos;
+ ImVec2 uv;
+ ALLEGRO_COLOR col;
+};
+
+// FIXME-OPT: Unfortunately Allegro doesn't support 32-bit packed colors so we have to convert them to 4 float as well..
+// FIXME-OPT: Consider inlining al_map_rgba()?
+// see https://github.com/liballeg/allegro5/blob/master/src/pixels.c#L554
+// and https://github.com/liballeg/allegro5/blob/master/include/allegro5/internal/aintern_pixels.h
+#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]); }
+
+// Allegro Data
+struct ImGui_ImplAllegro5_Data
+{
+ ALLEGRO_DISPLAY* Display;
+ ALLEGRO_BITMAP* Texture;
+ double Time;
+ ALLEGRO_MOUSE_CURSOR* MouseCursorInvisible;
+ ALLEGRO_VERTEX_DECL* VertexDecl;
+ char* ClipboardTextData;
+ ImGuiMouseCursor LastCursor;
+
+ ImVector<ImDrawVertAllegro> BufVertices;
+ ImVector<int> BufIndices;
+
+ ImGui_ImplAllegro5_Data() { memset((void*)this, 0, sizeof(*this)); }
+};
+
+// Backend data stored in io.BackendPlatformUserData to allow support for multiple Dear ImGui contexts
+// It is STRONGLY preferred that you use docking branch with multi-viewports (== single Dear ImGui context + multiple windows) instead of multiple Dear ImGui contexts.
+// FIXME: multi-context support is not well tested and probably dysfunctional in this backend.
+static ImGui_ImplAllegro5_Data* ImGui_ImplAllegro5_GetBackendData() { return ImGui::GetCurrentContext() ? (ImGui_ImplAllegro5_Data*)ImGui::GetIO().BackendPlatformUserData : nullptr; }
+
+static void ImGui_ImplAllegro5_SetupRenderState(ImDrawData* draw_data)
+{
+ // Setup blending
+ al_set_separate_blender(ALLEGRO_ADD, ALLEGRO_ALPHA, ALLEGRO_INVERSE_ALPHA, ALLEGRO_ADD, ALLEGRO_ONE, 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);
+ }
+}
+
+// Render function.
+void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
+{
+ // Avoid rendering when minimized
+ if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f)
+ return;
+
+ // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
+ // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
+ if (draw_data->Textures != nullptr)
+ for (ImTextureData* tex : *draw_data->Textures)
+ if (tex->Status != ImTextureStatus_OK)
+ ImGui_ImplAllegro5_UpdateTexture(tex);
+
+ // Backup Allegro state that will be modified
+ ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
+ 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 desired render state
+ ImGui_ImplAllegro5_SetupRenderState(draw_data);
+
+ // Render command lists
+ for (int n = 0; n < draw_data->CmdListsCount; n++)
+ {
+ const ImDrawList* draw_list = draw_data->CmdLists[n];
+
+ ImVector<ImDrawVertAllegro>& vertices = bd->BufVertices;
+#if ALLEGRO_HAS_DRAW_INDEXED_PRIM
+ vertices.resize(draw_list->VtxBuffer.Size);
+ for (int i = 0; i < draw_list->VtxBuffer.Size; i++)
+ {
+ const ImDrawVert* src_v = &draw_list->VtxBuffer[i];
+ ImDrawVertAllegro* dst_v = &vertices[i];
+ DRAW_VERT_IMGUI_TO_ALLEGRO(dst_v, src_v);
+ }
+ const int* indices = nullptr;
+ if (sizeof(ImDrawIdx) == 2)
+ {
+ // FIXME-OPT: 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.
+ bd->BufIndices.resize(draw_list->IdxBuffer.Size);
+ for (int i = 0; i < draw_list->IdxBuffer.Size; ++i)
+ bd->BufIndices[i] = (int)draw_list->IdxBuffer.Data[i];
+ indices = bd->BufIndices.Data;
+ }
+ else if (sizeof(ImDrawIdx) == 4)
+ {
+ indices = (const int*)draw_list->IdxBuffer.Data;
+ }
+#else
+ // Allegro's implementation of al_draw_indexed_prim() for DX9 was broken until 5.2.5. Unindex buffers ourselves while converting vertex format.
+ vertices.resize(draw_list->IdxBuffer.Size);
+ for (int i = 0; i < draw_list->IdxBuffer.Size; i++)
+ {
+ const ImDrawVert* src_v = &draw_list->VtxBuffer[draw_list->IdxBuffer[i]];
+ ImDrawVertAllegro* dst_v = &vertices[i];
+ DRAW_VERT_IMGUI_TO_ALLEGRO(dst_v, src_v);
+ }
+#endif
+
+ // Render command lists
+ ImVec2 clip_off = draw_data->DisplayPos;
+ for (int cmd_i = 0; cmd_i < draw_list->CmdBuffer.Size; cmd_i++)
+ {
+ const ImDrawCmd* pcmd = &draw_list->CmdBuffer[cmd_i];
+ if (pcmd->UserCallback)
+ {
+ // User callback, registered via ImDrawList::AddCallback()
+ // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+ if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
+ ImGui_ImplAllegro5_SetupRenderState(draw_data);
+ else
+ pcmd->UserCallback(draw_list, pcmd);
+ }
+ else
+ {
+ // Project scissor/clipping rectangles into framebuffer space
+ ImVec2 clip_min(pcmd->ClipRect.x - clip_off.x, pcmd->ClipRect.y - clip_off.y);
+ ImVec2 clip_max(pcmd->ClipRect.z - clip_off.x, pcmd->ClipRect.w - clip_off.y);
+ if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
+ continue;
+
+ // Apply scissor/clipping rectangle, Draw
+ 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);
+#if ALLEGRO_HAS_DRAW_INDEXED_PRIM
+ al_draw_indexed_prim(&vertices[0], bd->VertexDecl, texture, &indices[pcmd->IdxOffset], pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST);
+#else
+ al_draw_prim(&vertices[0], bd->VertexDecl, texture, pcmd->IdxOffset, pcmd->IdxOffset + pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST);
+#endif
+ }
+ }
+ }
+
+ // 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()
+{
+ ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
+
+ // 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);
+ bd->MouseCursorInvisible = al_create_mouse_cursor(mouse_cursor, 0, 0);
+ al_destroy_bitmap(mouse_cursor);
+
+ return true;
+}
+
+void ImGui_ImplAllegro5_UpdateTexture(ImTextureData* tex)
+{
+ if (tex->Status == ImTextureStatus_WantCreate)
+ {
+ // Create and upload new texture to graphics system
+ //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
+ IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == nullptr);
+ IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
+
+ // Create texture
+ // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
+ const int new_bitmap_flags = al_get_new_bitmap_flags();
+ int new_bitmap_format = 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* cpu_bitmap = al_create_bitmap(tex->Width, tex->Height);
+ al_set_new_bitmap_flags(new_bitmap_flags);
+ al_set_new_bitmap_format(new_bitmap_format);
+ IM_ASSERT(cpu_bitmap != nullptr && "Backend failed to create texture!");
+
+ // Upload pixels
+ ALLEGRO_LOCKED_REGION* locked_region = al_lock_bitmap(cpu_bitmap, al_get_bitmap_format(cpu_bitmap), ALLEGRO_LOCK_WRITEONLY);
+ IM_ASSERT(locked_region != nullptr && "Backend failed to create texture!");
+ memcpy(locked_region->data, tex->GetPixels(), tex->GetSizeInBytes());
+ al_unlock_bitmap(cpu_bitmap);
+
+ // Convert software texture to hardware texture.
+ ALLEGRO_BITMAP* gpu_bitmap = al_clone_bitmap(cpu_bitmap);
+ al_destroy_bitmap(cpu_bitmap);
+ IM_ASSERT(gpu_bitmap != nullptr && "Backend failed to create texture!");
+
+ // Store identifiers
+ tex->SetTexID((ImTextureID)(intptr_t)gpu_bitmap);
+ tex->SetStatus(ImTextureStatus_OK);
+ }
+ else if (tex->Status == ImTextureStatus_WantUpdates)
+ {
+ // Update selected blocks. We only ever write to textures regions which have never been used before!
+ // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
+ ImTextureRect r = tex->UpdateRect; // Bounding box encompassing all individual updates
+ ALLEGRO_BITMAP* gpu_bitmap = (ALLEGRO_BITMAP*)(intptr_t)tex->TexID;
+ ALLEGRO_LOCKED_REGION* locked_region = al_lock_bitmap_region(gpu_bitmap, r.x, r.y, r.w, r.h, al_get_bitmap_format(gpu_bitmap), ALLEGRO_LOCK_WRITEONLY);
+ IM_ASSERT(locked_region && "Backend failed to update texture!");
+ for (int y = 0; y < r.h; y++)
+ memcpy((unsigned char*)locked_region->data + locked_region->pitch * y, tex->GetPixelsAt(r.x, r.y + y), r.w * tex->BytesPerPixel); // dst, src, block pitch
+ al_unlock_bitmap(gpu_bitmap);
+ tex->SetStatus(ImTextureStatus_OK);
+ }
+ else if (tex->Status == ImTextureStatus_WantDestroy)
+ {
+ ALLEGRO_BITMAP* backend_tex = (ALLEGRO_BITMAP*)(intptr_t)tex->TexID;
+ if (backend_tex)
+ al_destroy_bitmap(backend_tex);
+
+ // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
+ tex->SetTexID(ImTextureID_Invalid);
+ tex->SetStatus(ImTextureStatus_Destroyed);
+ }
+}
+
+void ImGui_ImplAllegro5_InvalidateDeviceObjects()
+{
+ ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
+
+ // Destroy all textures
+ for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
+ if (tex->RefCount == 1)
+ {
+ tex->SetStatus(ImTextureStatus_WantDestroy);
+ ImGui_ImplAllegro5_UpdateTexture(tex);
+ }
+
+ // Destroy mouse cursor
+ if (bd->MouseCursorInvisible)
+ {
+ al_destroy_mouse_cursor(bd->MouseCursorInvisible);
+ bd->MouseCursorInvisible = nullptr;
+ }
+}
+
+#if ALLEGRO_HAS_CLIPBOARD
+static const char* ImGui_ImplAllegro5_GetClipboardText(ImGuiContext*)
+{
+ ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
+ if (bd->ClipboardTextData)
+ al_free(bd->ClipboardTextData);
+ bd->ClipboardTextData = al_get_clipboard_text(bd->Display);
+ return bd->ClipboardTextData;
+}
+
+static void ImGui_ImplAllegro5_SetClipboardText(ImGuiContext*, const char* text)
+{
+ ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
+ al_set_clipboard_text(bd->Display, text);
+}
+#endif
+
+// Not static to allow third-party code to use that if they want to (but undocumented)
+ImGuiKey ImGui_ImplAllegro5_KeyCodeToImGuiKey(int key_code);
+ImGuiKey ImGui_ImplAllegro5_KeyCodeToImGuiKey(int key_code)
+{
+ switch (key_code)
+ {
+ case ALLEGRO_KEY_TAB: return ImGuiKey_Tab;
+ case ALLEGRO_KEY_LEFT: return ImGuiKey_LeftArrow;
+ case ALLEGRO_KEY_RIGHT: return ImGuiKey_RightArrow;
+ case ALLEGRO_KEY_UP: return ImGuiKey_UpArrow;
+ case ALLEGRO_KEY_DOWN: return ImGuiKey_DownArrow;
+ case ALLEGRO_KEY_PGUP: return ImGuiKey_PageUp;
+ case ALLEGRO_KEY_PGDN: return ImGuiKey_PageDown;
+ case ALLEGRO_KEY_HOME: return ImGuiKey_Home;
+ case ALLEGRO_KEY_END: return ImGuiKey_End;
+ case ALLEGRO_KEY_INSERT: return ImGuiKey_Insert;
+ case ALLEGRO_KEY_DELETE: return ImGuiKey_Delete;
+ case ALLEGRO_KEY_BACKSPACE: return ImGuiKey_Backspace;
+ case ALLEGRO_KEY_SPACE: return ImGuiKey_Space;
+ case ALLEGRO_KEY_ENTER: return ImGuiKey_Enter;
+ case ALLEGRO_KEY_ESCAPE: return ImGuiKey_Escape;
+ case ALLEGRO_KEY_QUOTE: return ImGuiKey_Apostrophe;
+ case ALLEGRO_KEY_COMMA: return ImGuiKey_Comma;
+ case ALLEGRO_KEY_MINUS: return ImGuiKey_Minus;
+ case ALLEGRO_KEY_FULLSTOP: return ImGuiKey_Period;
+ case ALLEGRO_KEY_SLASH: return ImGuiKey_Slash;
+ case ALLEGRO_KEY_SEMICOLON: return ImGuiKey_Semicolon;
+ case ALLEGRO_KEY_EQUALS: return ImGuiKey_Equal;
+ case ALLEGRO_KEY_OPENBRACE: return ImGuiKey_LeftBracket;
+ case ALLEGRO_KEY_BACKSLASH: return ImGuiKey_Backslash;
+ case ALLEGRO_KEY_CLOSEBRACE: return ImGuiKey_RightBracket;
+ case ALLEGRO_KEY_TILDE: return ImGuiKey_GraveAccent;
+ case ALLEGRO_KEY_CAPSLOCK: return ImGuiKey_CapsLock;
+ case ALLEGRO_KEY_SCROLLLOCK: return ImGuiKey_ScrollLock;
+ case ALLEGRO_KEY_NUMLOCK: return ImGuiKey_NumLock;
+ case ALLEGRO_KEY_PRINTSCREEN: return ImGuiKey_PrintScreen;
+ case ALLEGRO_KEY_PAUSE: return ImGuiKey_Pause;
+ case ALLEGRO_KEY_PAD_0: return ImGuiKey_Keypad0;
+ case ALLEGRO_KEY_PAD_1: return ImGuiKey_Keypad1;
+ case ALLEGRO_KEY_PAD_2: return ImGuiKey_Keypad2;
+ case ALLEGRO_KEY_PAD_3: return ImGuiKey_Keypad3;
+ case ALLEGRO_KEY_PAD_4: return ImGuiKey_Keypad4;
+ case ALLEGRO_KEY_PAD_5: return ImGuiKey_Keypad5;
+ case ALLEGRO_KEY_PAD_6: return ImGuiKey_Keypad6;
+ 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();
+ IMGUI_CHECKVERSION();
+ 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)
+ io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures; // We can honor ImGuiPlatformIO::Textures[] requests during render.
+
+ bd->Display = display;
+ bd->LastCursor = ALLEGRO_SYSTEM_MOUSE_CURSOR_NONE;
+
+ // 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, offsetof(ImDrawVertAllegro, pos) },
+ { ALLEGRO_PRIM_TEX_COORD, ALLEGRO_PRIM_FLOAT_2, offsetof(ImDrawVertAllegro, uv) },
+ { ALLEGRO_PRIM_COLOR_ATTR, 0, offsetof(ImDrawVertAllegro, col) },
+ { 0, 0, 0 }
+ };
+ bd->VertexDecl = al_create_vertex_decl(elems, sizeof(ImDrawVertAllegro));
+
+#if ALLEGRO_HAS_CLIPBOARD
+ ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+ platform_io.Platform_SetClipboardTextFn = ImGui_ImplAllegro5_SetClipboardText;
+ platform_io.Platform_GetClipboardTextFn = ImGui_ImplAllegro5_GetClipboardText;
+#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 | ImGuiBackendFlags_RendererHasTextures);
+ 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)
+{
+ ImGui_ImplAllegro5_Data* bd = ImGui_ImplAllegro5_GetBackendData();
+ IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplAllegro5_Init()?");
+ ImGuiIO& io = ImGui::GetIO();
+
+ 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();
+
+ // Hide OS mouse cursor if imgui is drawing it
+ if (io.MouseDrawCursor)
+ imgui_cursor = ImGuiMouseCursor_None;
+
+ if (bd->LastCursor == imgui_cursor)
+ return;
+ bd->LastCursor = imgui_cursor;
+ if (imgui_cursor == ImGuiMouseCursor_None)
+ {
+ 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_Wait: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_BUSY; break;
+ case ImGuiMouseCursor_Progress: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_PROGRESS; 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 && "Context or backend not initialized! Did you call ImGui_ImplAllegro5_Init()?");
+
+ if (!bd->MouseCursorInvisible)
+ ImGui_ImplAllegro5_CreateDeviceObjects();
+
+ // Setup display size (every frame to accommodate for window resizing)
+ ImGuiIO& io = ImGui::GetIO();
+ 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();
+}
+
+//-----------------------------------------------------------------------------
+
+#endif // #ifndef IMGUI_DISABLE