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@@ -3,10 +3,11 @@
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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 in imgui.cpp.
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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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+
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// Issues:
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-// [ ] Renderer: The renderer is suboptimal as we need to convert vertices.
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-// [ ] Platform: Clipboard support via al_set_clipboard_text/al_clipboard_has_text.
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+// [ ] Renderer: The renderer is suboptimal as we need to unindex our buffers and convert the format of vertices.
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// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
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// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
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@@ -15,6 +16,9 @@
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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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+// 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: 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-bits 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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@@ -26,12 +30,19 @@
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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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+
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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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-
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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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+
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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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// Data
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static ALLEGRO_DISPLAY* g_Display = NULL;
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@@ -39,6 +50,7 @@ static ALLEGRO_BITMAP* g_Texture = NULL;
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static double g_Time = 0.0;
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static ALLEGRO_MOUSE_CURSOR* g_MouseCursorInvisible = NULL;
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static ALLEGRO_VERTEX_DECL* g_VertexDecl = NULL;
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+static char* g_ClipboardTextData = NULL;
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struct ImDrawVertAllegro
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{
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@@ -51,32 +63,53 @@ struct ImDrawVertAllegro
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// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
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void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
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{
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- int op, src, dst;
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- al_get_blender(&op, &src, &dst);
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+ // Backup Allegro state that will be modified
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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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+
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+ // Setup render state
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al_set_blender(ALLEGRO_ADD, ALLEGRO_ALPHA, ALLEGRO_INVERSE_ALPHA);
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+ // Setup orthographic projection matrix
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+ // Our visible imgui space lies from draw_data->DisplayPps (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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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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- // FIXME-OPT: Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 floats
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+ // Allegro's implementation of al_draw_indexed_prim() for DX9 is completely broken. Unindex our buffers ourselves.
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+ // FIXME-OPT: Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 float as well..
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static ImVector<ImDrawVertAllegro> vertices;
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- vertices.resize(cmd_list->VtxBuffer.Size);
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- for (int i = 0; i < cmd_list->VtxBuffer.Size; ++i)
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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 &dv = cmd_list->VtxBuffer[i];
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- ImDrawVertAllegro v;
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- v.pos = dv.pos;
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- v.uv = dv.uv;
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- unsigned char *c = (unsigned char*)&dv.col;
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- v.col = al_map_rgba(c[0], c[1], c[2], c[3]);
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- vertices[i] = v;
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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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+ dst_v->pos = src_v->pos;
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+ dst_v->uv = src_v->uv;
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+ unsigned char* c = (unsigned char*)&src_v->col;
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+ dst_v->col = al_map_rgba(c[0], c[1], c[2], c[3]);
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}
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const int* indices = NULL;
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if (sizeof(ImDrawIdx) == 2)
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{
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- // FIXME-OPT: Unfortunately Allegro doesn't support 16-bit indices.. You can '#define ImDrawIdx int' in imconfig.h to request ImGui to output 32-bit indices.
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+ // FIXME-OPT: Unfortunately Allegro doesn't support 16-bit indices.. You can '#define ImDrawIdx int' in imconfig.h to request 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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static ImVector<int> indices_converted;
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indices_converted.resize(cmd_list->IdxBuffer.Size);
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@@ -90,6 +123,7 @@ void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
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}
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int idx_offset = 0;
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+ ImVec2 pos = 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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@@ -100,16 +134,18 @@ void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
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else
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{
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ALLEGRO_BITMAP* texture = (ALLEGRO_BITMAP*)pcmd->TextureId;
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- al_set_clipping_rectangle(pcmd->ClipRect.x, pcmd->ClipRect.y, pcmd->ClipRect.z-pcmd->ClipRect.x, pcmd->ClipRect.w-pcmd->ClipRect.y);
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- al_draw_indexed_prim(&vertices[0], g_VertexDecl, texture, &indices[idx_offset], pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST);
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+ 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);
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+ al_draw_prim(&vertices[0], g_VertexDecl, texture, idx_offset, idx_offset + pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST);
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}
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idx_offset += pcmd->ElemCount;
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}
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}
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- // Restore modified state
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- al_set_blender(op, src, dst);
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- al_set_clipping_rectangle(0, 0, al_get_display_width(g_Display), al_get_display_height(g_Display));
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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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@@ -174,6 +210,21 @@ void ImGui_ImplAllegro5_InvalidateDeviceObjects()
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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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+ if (g_ClipboardTextData)
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+ al_free(g_ClipboardTextData);
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+ g_ClipboardTextData = al_get_clipboard_text(g_Display);
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+ return g_ClipboardTextData;
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+}
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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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+ al_set_clipboard_text(g_Display, text);
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+}
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+#endif
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+
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bool ImGui_ImplAllegro5_Init(ALLEGRO_DISPLAY* display)
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{
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g_Display = display;
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@@ -216,12 +267,24 @@ bool ImGui_ImplAllegro5_Init(ALLEGRO_DISPLAY* display)
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io.KeyMap[ImGuiKey_Y] = ALLEGRO_KEY_Y;
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io.KeyMap[ImGuiKey_Z] = ALLEGRO_KEY_Z;
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+#if ALLEGRO_HAS_CLIPBOARD
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+ io.SetClipboardTextFn = ImGui_ImplAllegro5_SetClipboardText;
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+ io.GetClipboardTextFn = ImGui_ImplAllegro5_GetClipboardText;
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+ io.ClipboardUserData = NULL;
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+#endif
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+
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return true;
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}
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void ImGui_ImplAllegro5_Shutdown()
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{
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ImGui_ImplAllegro5_InvalidateDeviceObjects();
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+ g_Display = NULL;
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+
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+ // Destroy last known clipboard data
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+ if (g_ClipboardTextData)
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+ al_free(g_ClipboardTextData);
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+ g_ClipboardTextData = NULL;
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}
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// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
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omar