features/sdl_renderer3_multiviewports
ocornut
ago%!(EXTRA string=10 years)
commit
60dd221737
9 changed files with 444 additions and 15 deletions
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# How to Build |
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- On Ubuntu 14.04+ |
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```bash |
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g++ -I ../imgui main.cpp imgui_impl_a5.cpp ../imgui/imgui.cpp -lallegro -lallegro_primitives |
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``` |
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- On Windows with Visual Studio's CLI |
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\<a5path\> is your allegro5 folder. |
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``` |
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cl /MD /I <a5path\include> /I ..\imgui main.cpp imgui_impl_a5.cpp ..\imgui\imgui.cpp /link /LIBPATH:<a5path\lib> allegro-5.0.10-monolith-md.lib user32.lib |
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``` |
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public domain |
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// ImGui Allegro 5 bindings
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// https://github.com/ocornut/imgui
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// by @birthggd, public domain
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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_a5.h" |
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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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// Data
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static ALLEGRO_DISPLAY* g_Display = NULL; |
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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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#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT)) |
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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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static void ImGui_ImplA5_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count) |
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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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al_set_blender(ALLEGRO_ADD, ALLEGRO_ALPHA, ALLEGRO_INVERSE_ALPHA); |
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for (int n = 0; n < cmd_lists_count; n++)
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{ |
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const ImDrawList* cmd_list = cmd_lists[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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static ImVector<ImDrawVertAllegro> vertices; |
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vertices.resize(cmd_list->vtx_buffer.size()); |
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for (int i = 0; i < cmd_list->vtx_buffer.size(); ++i)
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{ |
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const ImDrawVert &dv = cmd_list->vtx_buffer[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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} |
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int vtx_offset = 0; |
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for (int cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
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{ |
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const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i]; |
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if (pcmd->user_callback)
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{ |
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pcmd->user_callback(cmd_list, pcmd); |
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} |
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else
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{ |
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ALLEGRO_BITMAP* texture = (ALLEGRO_BITMAP*)pcmd->texture_id; |
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al_set_clipping_rectangle(pcmd->clip_rect.x, pcmd->clip_rect.y, pcmd->clip_rect.z-pcmd->clip_rect.x, pcmd->clip_rect.w-pcmd->clip_rect.y); |
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al_draw_prim(&vertices[0], g_VertexDecl, texture, vtx_offset, vtx_offset+pcmd->vtx_count, ALLEGRO_PRIM_TRIANGLE_LIST); |
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} |
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vtx_offset += pcmd->vtx_count; |
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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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} |
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bool Imgui_ImplA5_CreateDeviceObjects() |
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{ |
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ImGuiIO &io = ImGui::GetIO(); |
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// Build texture
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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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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->TexID = (void*)cloned_img; |
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g_Texture = cloned_img; |
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// Cleanup (don't clear the input data if you want to append new fonts later)
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io.Fonts->ClearInputData(); |
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io.Fonts->ClearTexData(); |
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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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g_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_ImplA5_InvalidateDeviceObjects() |
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{ |
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if (g_Texture)
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{ |
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al_destroy_bitmap(g_Texture); |
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ImGui::GetIO().Fonts->TexID = NULL; |
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g_Texture = NULL; |
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} |
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if (g_MouseCursorInvisible) |
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{ |
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al_destroy_mouse_cursor(g_MouseCursorInvisible); |
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g_MouseCursorInvisible = NULL; |
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} |
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} |
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bool ImGui_ImplA5_Init(ALLEGRO_DISPLAY* display) |
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{ |
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g_Display = display; |
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// Create custom vertex declaration.
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// Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 floats.
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// 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.
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ALLEGRO_VERTEX_ELEMENT elems[] =
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{ |
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{ ALLEGRO_PRIM_POSITION, ALLEGRO_PRIM_FLOAT_2, OFFSETOF(ImDrawVertAllegro, pos) }, |
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{ ALLEGRO_PRIM_TEX_COORD, ALLEGRO_PRIM_FLOAT_2, OFFSETOF(ImDrawVertAllegro, uv) }, |
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{ ALLEGRO_PRIM_COLOR_ATTR, 0, OFFSETOF(ImDrawVertAllegro, col) }, |
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{ 0, 0, 0 } |
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}; |
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g_VertexDecl = al_create_vertex_decl(elems, sizeof(ImDrawVertAllegro)); |
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ImGuiIO& io = ImGui::GetIO(); |
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io.KeyMap[ImGuiKey_Tab] = ALLEGRO_KEY_TAB; |
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io.KeyMap[ImGuiKey_LeftArrow] = ALLEGRO_KEY_LEFT; |
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io.KeyMap[ImGuiKey_RightArrow] = ALLEGRO_KEY_RIGHT; |
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io.KeyMap[ImGuiKey_UpArrow] = ALLEGRO_KEY_UP; |
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io.KeyMap[ImGuiKey_DownArrow] = ALLEGRO_KEY_DOWN; |
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io.KeyMap[ImGuiKey_PageUp] = ALLEGRO_KEY_PGUP; |
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io.KeyMap[ImGuiKey_PageDown] = ALLEGRO_KEY_PGDN; |
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io.KeyMap[ImGuiKey_Home] = ALLEGRO_KEY_HOME; |
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io.KeyMap[ImGuiKey_End] = ALLEGRO_KEY_END; |
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io.KeyMap[ImGuiKey_Delete] = ALLEGRO_KEY_DELETE; |
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io.KeyMap[ImGuiKey_Backspace] = ALLEGRO_KEY_BACKSPACE; |
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io.KeyMap[ImGuiKey_Enter] = ALLEGRO_KEY_ENTER; |
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io.KeyMap[ImGuiKey_Escape] = ALLEGRO_KEY_ESCAPE; |
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io.KeyMap[ImGuiKey_A] = ALLEGRO_KEY_A; |
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io.KeyMap[ImGuiKey_C] = ALLEGRO_KEY_C; |
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io.KeyMap[ImGuiKey_V] = ALLEGRO_KEY_V; |
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io.KeyMap[ImGuiKey_X] = ALLEGRO_KEY_X; |
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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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io.RenderDrawListsFn = ImGui_ImplA5_RenderDrawLists; |
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#ifdef _WIN32 |
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io.ImeWindowHandle = al_get_win_window_handle(g_Display); |
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#endif |
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return true; |
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} |
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void ImGui_ImplA5_Shutdown() |
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{ |
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ImGui_ImplA5_InvalidateDeviceObjects(); |
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ImGui::Shutdown(); |
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} |
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bool ImGui_ImplA5_ProcessEvent(ALLEGRO_EVENT *ev) |
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{ |
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ImGuiIO &io = ImGui::GetIO(); |
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switch (ev->type)
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{ |
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case ALLEGRO_EVENT_MOUSE_AXES: |
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io.MouseWheel += ev->mouse.dz; |
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return true; |
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case ALLEGRO_EVENT_KEY_CHAR: |
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if (ev->keyboard.display == g_Display)
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if (ev->keyboard.unichar > 0 && ev->keyboard.unichar < 0x10000) |
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io.AddInputCharacter((unsigned short)ev->keyboard.unichar); |
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return true; |
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case ALLEGRO_EVENT_KEY_DOWN: |
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case ALLEGRO_EVENT_KEY_UP: |
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if (ev->keyboard.display == g_Display) |
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io.KeysDown[ev->keyboard.keycode] = (ev->type == ALLEGRO_EVENT_KEY_DOWN); |
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return true; |
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} |
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return false; |
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} |
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void ImGui_ImplA5_NewFrame() |
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{ |
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if (!g_Texture)
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Imgui_ImplA5_CreateDeviceObjects(); |
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ImGuiIO &io = ImGui::GetIO(); |
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// Setup display size (every frame to accommodate for window resizing)
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int w, h; |
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w = al_get_display_width(g_Display); |
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h = al_get_display_height(g_Display); |
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io.DisplaySize = ImVec2((float)w, (float)h); |
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// Setup time step
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double current_time = al_get_time(); |
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io.DeltaTime = g_Time > 0.0 ? (float)(current_time - g_Time) : (float)(1.0f/60.0f); |
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g_Time = current_time; |
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// Setup inputs
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ALLEGRO_KEYBOARD_STATE keys; |
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al_get_keyboard_state(&keys); |
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io.KeyCtrl = al_key_down(&keys, ALLEGRO_KEY_LCTRL) || al_key_down(&keys, ALLEGRO_KEY_RCTRL); |
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io.KeyShift = al_key_down(&keys, ALLEGRO_KEY_LSHIFT) || al_key_down(&keys, ALLEGRO_KEY_RSHIFT); |
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io.KeyAlt = al_key_down(&keys, ALLEGRO_KEY_ALT) || al_key_down(&keys, ALLEGRO_KEY_ALTGR); |
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ALLEGRO_MOUSE_STATE mouse; |
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if (keys.display == g_Display)
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{ |
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al_get_mouse_state(&mouse); |
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io.MousePos = ImVec2((float)mouse.x, (float)mouse.y); |
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} |
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else
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{ |
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io.MousePos = ImVec2(-1, -1); |
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} |
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al_get_mouse_state(&mouse); |
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io.MouseDown[0] = mouse.buttons & (1 << 0); |
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io.MouseDown[1] = mouse.buttons & (1 << 1); |
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io.MouseDown[2] = mouse.buttons & (1 << 2); |
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// Hide OS mouse cursor if ImGui is drawing it
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if (io.MouseDrawCursor) |
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{ |
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al_set_mouse_cursor(g_Display, g_MouseCursorInvisible); |
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} |
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else |
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{ |
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ALLEGRO_SYSTEM_MOUSE_CURSOR cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_DEFAULT; |
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switch (ImGui::GetMouseCursor()) |
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{ |
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case ImGuiMouseCursor_TextInput: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_EDIT; break; |
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case ImGuiMouseCursor_Move: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_MOVE; break; |
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case ImGuiMouseCursor_ResizeNS: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_N; break; |
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case ImGuiMouseCursor_ResizeEW: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_E; break; |
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case ImGuiMouseCursor_ResizeNESW: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NE; break; |
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case ImGuiMouseCursor_ResizeNWSE: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NW; break; |
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} |
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al_set_system_mouse_cursor(g_Display, cursor_id); |
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} |
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// Start the frame
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ImGui::NewFrame(); |
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} |
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@ -0,0 +1,18 @@ |
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// ImGui Allegro 5 bindings
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// https://github.com/ocornut/imgui
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// by @birthggd, public domain
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#pragma once |
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struct ALLEGRO_DISPLAY; |
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union ALLEGRO_EVENT; |
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bool ImGui_ImplA5_Init(ALLEGRO_DISPLAY* display); |
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void ImGui_ImplA5_Shutdown(); |
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void ImGui_ImplA5_NewFrame(); |
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bool ImGui_ImplA5_ProcessEvent(ALLEGRO_EVENT* event); |
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// Use if you want to reset your rendering device without losing ImGui state.
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bool Imgui_ImplA5_CreateDeviceObjects(); |
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void ImGui_ImplA5_InvalidateDeviceObjects(); |
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// ImGui - standalone example application for Allegro 5
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// public domain
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#include <stdint.h> |
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#include <allegro5/allegro.h> |
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#include <allegro5/allegro_primitives.h> |
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#include <imgui.h> |
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#include "imgui_impl_a5.h" |
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int main(int, char**) |
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{ |
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// Setup Allegro
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al_init(); |
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al_install_keyboard(); |
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al_install_mouse(); |
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al_init_primitives_addon(); |
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al_set_new_display_flags(ALLEGRO_RESIZABLE); |
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ALLEGRO_DISPLAY* display = al_create_display(1280, 720); |
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al_set_window_title(display, "ImGui Allegro 5 example"); |
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ALLEGRO_EVENT_QUEUE* queue = al_create_event_queue(); |
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al_register_event_source(queue, al_get_display_event_source(display)); |
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al_register_event_source(queue, al_get_keyboard_event_source()); |
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al_register_event_source(queue, al_get_mouse_event_source()); |
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// Setup ImGui binding
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ImGui_ImplA5_Init(display); |
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//ImGuiIO& io = ImGui::GetIO();
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//ImFont* my_font0 = io.Fonts->AddFontDefault();
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//ImFont* my_font1 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/DroidSans.ttf", 16.0f);
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//ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/Karla-Regular.ttf", 16.0f);
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//ImFont* my_font3 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyClean.ttf", 13.0f); my_font3->DisplayOffset.y += 1;
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//ImFont* my_font4 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyTiny.ttf", 10.0f); my_font4->DisplayOffset.y += 1;
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//ImFont* my_font5 = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, io.Fonts->GetGlyphRangesJapanese());
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bool show_test_window = true; |
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bool show_another_window = false; |
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ImVec4 clear_color = ImColor(114, 144, 154); |
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// Main loop
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bool running = true; |
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while (running)
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{ |
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ALLEGRO_EVENT ev; |
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while (al_get_next_event(queue, &ev)) |
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{ |
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ImGui_ImplA5_ProcessEvent(&ev); |
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if (ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE) running = false; |
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if (ev.type == ALLEGRO_EVENT_DISPLAY_RESIZE) |
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{ |
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ImGui_ImplA5_InvalidateDeviceObjects(); |
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al_acknowledge_resize(display); |
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Imgui_ImplA5_CreateDeviceObjects(); |
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} |
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} |
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ImGui_ImplA5_NewFrame(); |
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// 1. Show a simple window
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// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
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{ |
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static float f; |
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ImGui::Text("Hello, world!"); |
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ImGui::SliderFloat("float", &f, 0.0f, 1.0f); |
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ImGui::ColorEdit3("clear color", (float*)&clear_color); |
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if (ImGui::Button("Test Window")) show_test_window ^= 1; |
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if (ImGui::Button("Another Window")) show_another_window ^= 1; |
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ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f/ImGui::GetIO().Framerate, ImGui::GetIO().Framerate); |
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} |
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// 2. Show another simple window, this time using an explicit Begin/End pair
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if (show_another_window)
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{ |
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ImGui::SetNextWindowSize(ImVec2(200, 100), ImGuiSetCond_FirstUseEver); |
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ImGui::Begin("Another Window", &show_another_window); |
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ImGui::Text("Hello"); |
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ImGui::End(); |
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} |
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// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
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if (show_test_window)
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{ |
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ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCond_FirstUseEver); |
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ImGui::ShowTestWindow(&show_test_window); |
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} |
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// Rendering
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al_clear_to_color(al_map_rgba_f(clear_color.x, clear_color.y, clear_color.z, clear_color.w)); |
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ImGui::Render(); |
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al_flip_display(); |
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} |
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// Cleanup
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ImGui_ImplA5_Shutdown(); |
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al_destroy_event_queue(queue); |
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al_destroy_display(display); |
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return 0; |
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} |
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@ -0,0 +1,10 @@ |
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# How to Build |
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- On Windows with Visual Studio's CLI |
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\<sdl2path\> is your SDL2 folder. |
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``` |
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cl /MD /I <sdl2path\include> /I ..\.. main.cpp imgui_impl_sdl.cpp ..\..\imgui.cpp /link /LIBPATH:<sdl2path\lib> SDL2.lib SDL2main.lib |
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``` |
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