diff --git a/examples/allegro5_example/imgui_impl_a5.cpp b/examples/allegro5_example/imgui_impl_a5.cpp index e9b2282b6..ffd13a3c2 100644 --- a/examples/allegro5_example/imgui_impl_a5.cpp +++ b/examples/allegro5_example/imgui_impl_a5.cpp @@ -13,215 +13,227 @@ #include #endif - -static ALLEGRO_DISPLAY *g_disp = NULL; -static ALLEGRO_BITMAP *g_img = NULL; -static double g_time = 0.0; - +// Data +static ALLEGRO_DISPLAY* g_Display = NULL; +static ALLEGRO_BITMAP* g_Surface = NULL; +static double g_Time = 0.0; static void ImGui_ImplA5_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count) { - if (cmd_lists_count == 0) return; - - const float width = ImGui::GetIO().DisplaySize.x; - const float height = ImGui::GetIO().DisplaySize.y; - - const float bw = al_get_bitmap_width(g_img); - const float bh = al_get_bitmap_height(g_img); - - int op, src, dst; - al_get_blender(&op, &src, &dst); - al_set_blender(ALLEGRO_ADD, ALLEGRO_ALPHA, ALLEGRO_INVERSE_ALPHA); - - #define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->Element)) - for (int n=0; n < cmd_lists_count; ++n) { - const ImDrawList* cmd_list = cmd_lists[n]; - static ImVector vertices; - vertices.reserve(cmd_list->vtx_buffer.size()); - vertices.clear(); - for (int i = 0; i < cmd_list->vtx_buffer.size(); ++i) { - ALLEGRO_VERTEX v; - const ImDrawVert &dv = cmd_list->vtx_buffer[i]; - v.x = dv.pos.x; - v.y = dv.pos.y; - v.z = 0; - v.u = dv.uv.x * bw; - v.v = dv.uv.y * bh; - unsigned char *c = (unsigned char*)&dv.col; - v.color = al_map_rgba(c[0], c[1], c[2], c[3]); - vertices.push_back(v); - } - int vtx_offset = 0; - for (size_t cmd_i=0; cmd_i < cmd_list->commands.size(); ++cmd_i) { - const ImDrawCmd *pcmd = &cmd_list->commands[cmd_i]; - if (pcmd->user_callback) { - pcmd->user_callback(cmd_list, pcmd); - } - else { - ALLEGRO_BITMAP *tex = (ALLEGRO_BITMAP*)pcmd->texture_id; - al_set_clipping_rectangle(pcmd->clip_rect.x, pcmd->clip_rect.y, pcmd->clip_rect.z, pcmd->clip_rect.w); - al_draw_prim(&vertices[0], NULL, tex, vtx_offset, vtx_offset+pcmd->vtx_count, ALLEGRO_PRIM_TRIANGLE_LIST); - } - vtx_offset += pcmd->vtx_count; + const float width = ImGui::GetIO().DisplaySize.x; + const float height = ImGui::GetIO().DisplaySize.y; + + const float bw = al_get_bitmap_width(g_Surface); + const float bh = al_get_bitmap_height(g_Surface); + + int op, src, dst; + al_get_blender(&op, &src, &dst); + al_set_blender(ALLEGRO_ADD, ALLEGRO_ALPHA, ALLEGRO_INVERSE_ALPHA); + + #define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->Element)) + for (int n=0; n < cmd_lists_count; ++n) + { + const ImDrawList* cmd_list = cmd_lists[n]; + static ImVector vertices; + vertices.reserve(cmd_list->vtx_buffer.size()); + vertices.clear(); + for (int i = 0; i < cmd_list->vtx_buffer.size(); ++i) + { + ALLEGRO_VERTEX v; + const ImDrawVert &dv = cmd_list->vtx_buffer[i]; + v.x = dv.pos.x; + v.y = dv.pos.y; + v.z = 0; + v.u = dv.uv.x * bw; + v.v = dv.uv.y * bh; + unsigned char *c = (unsigned char*)&dv.col; + v.color = al_map_rgba(c[0], c[1], c[2], c[3]); + vertices.push_back(v); + } + int vtx_offset = 0; + for (size_t cmd_i=0; cmd_i < cmd_list->commands.size(); ++cmd_i) + { + const ImDrawCmd *pcmd = &cmd_list->commands[cmd_i]; + if (pcmd->user_callback) + { + pcmd->user_callback(cmd_list, pcmd); + } + else + { + ALLEGRO_BITMAP *tex = (ALLEGRO_BITMAP*)pcmd->texture_id; + al_set_clipping_rectangle(pcmd->clip_rect.x, pcmd->clip_rect.y, pcmd->clip_rect.z, pcmd->clip_rect.w); + al_draw_prim(&vertices[0], NULL, tex, vtx_offset, vtx_offset+pcmd->vtx_count, ALLEGRO_PRIM_TRIANGLE_LIST); + } + vtx_offset += pcmd->vtx_count; + } } - } - #undef OFFSETOF + #undef OFFSETOF - // restore state - al_set_blender(op, src, dst); - al_set_clipping_rectangle(0, 0, al_get_display_width(g_disp), al_get_display_height(g_disp)); + // restore state + al_set_blender(op, src, dst); + al_set_clipping_rectangle(0, 0, al_get_display_width(g_Display), al_get_display_height(g_Display)); } - bool Imgui_ImplA5_CreateDeviceObjects() { - ImGuiIO &io = ImGui::GetIO(); - - unsigned char *pixels; - int width, height; - io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); - - int flags = al_get_new_bitmap_flags(); - int fmt = al_get_new_bitmap_format(); - al_set_new_bitmap_flags(ALLEGRO_MEMORY_BITMAP|ALLEGRO_MIN_LINEAR|ALLEGRO_MAG_LINEAR); - al_set_new_bitmap_format(ALLEGRO_PIXEL_FORMAT_ABGR_8888_LE); - ALLEGRO_BITMAP *img = al_create_bitmap(width, height); - // restore bitmap state - al_set_new_bitmap_flags(flags); - al_set_new_bitmap_format(fmt); - if (!img) return false; - - ALLEGRO_LOCKED_REGION *locked_img; - locked_img = al_lock_bitmap(img, al_get_bitmap_format(img), ALLEGRO_LOCK_WRITEONLY); - if (!locked_img) { + ImGuiIO &io = ImGui::GetIO(); + + // Build texture + unsigned char *pixels; + int width, height; + io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); + + // Create texture + int flags = al_get_new_bitmap_flags(); + int fmt = al_get_new_bitmap_format(); + al_set_new_bitmap_flags(ALLEGRO_MEMORY_BITMAP|ALLEGRO_MIN_LINEAR|ALLEGRO_MAG_LINEAR); + al_set_new_bitmap_format(ALLEGRO_PIXEL_FORMAT_ABGR_8888_LE); + ALLEGRO_BITMAP* img = al_create_bitmap(width, height); + al_set_new_bitmap_flags(flags); + al_set_new_bitmap_format(fmt); + if (!img) + return false; + + ALLEGRO_LOCKED_REGION *locked_img = al_lock_bitmap(img, al_get_bitmap_format(img), ALLEGRO_LOCK_WRITEONLY); + if (!locked_img) + { + al_destroy_bitmap(img); + return false; + } + memcpy(locked_img->data, pixels, sizeof(int)*width*height); + al_unlock_bitmap(img); + + // Convert software texture to hardware texture. + ALLEGRO_BITMAP* cloned_img = al_clone_bitmap(img); al_destroy_bitmap(img); - return false; - } - memcpy(locked_img->data, pixels, sizeof(int)*width*height); - al_unlock_bitmap(img); + if (!cloned_img) + return false; - // convert software texture to hardware texture. - ALLEGRO_BITMAP *cloned_img = al_clone_bitmap(img); - al_destroy_bitmap(img); - if (!cloned_img) return false; - - io.Fonts->TexID = cloned_img; + // Store our identifier + io.Fonts->TexID = (void*)cloned_img; + g_Surface = cloned_img; - g_img = cloned_img; + // Cleanup (don't clear the input data if you want to append new fonts later) + io.Fonts->ClearInputData(); + io.Fonts->ClearTexData(); - return true; + return true; } - void ImGui_ImplA5_InvalidateDeviceObjects() { - if (g_img) { - al_destroy_bitmap(g_img); - ImGui::GetIO().Fonts->TexID = NULL; - g_img = NULL; - } + if (g_Surface) + { + al_destroy_bitmap(g_Surface); + ImGui::GetIO().Fonts->TexID = NULL; + g_Surface = NULL; + } } - -bool ImGui_ImplA5_Init(ALLEGRO_DISPLAY *disp) +bool ImGui_ImplA5_Init(ALLEGRO_DISPLAY* display) { - g_disp = disp; - - ImGuiIO& io = ImGui::GetIO(); - io.KeyMap[ImGuiKey_Tab] = ALLEGRO_KEY_TAB; - io.KeyMap[ImGuiKey_LeftArrow] = ALLEGRO_KEY_LEFT; - io.KeyMap[ImGuiKey_RightArrow] = ALLEGRO_KEY_RIGHT; - io.KeyMap[ImGuiKey_UpArrow] = ALLEGRO_KEY_UP; - io.KeyMap[ImGuiKey_DownArrow] = ALLEGRO_KEY_DOWN; - io.KeyMap[ImGuiKey_Home] = ALLEGRO_KEY_HOME; - io.KeyMap[ImGuiKey_End] = ALLEGRO_KEY_END; - io.KeyMap[ImGuiKey_Delete] = ALLEGRO_KEY_DELETE; - io.KeyMap[ImGuiKey_Backspace] = ALLEGRO_KEY_BACKSPACE; - io.KeyMap[ImGuiKey_Enter] = ALLEGRO_KEY_ENTER; - io.KeyMap[ImGuiKey_Escape] = ALLEGRO_KEY_ESCAPE; - io.KeyMap[ImGuiKey_A] = ALLEGRO_KEY_A; - io.KeyMap[ImGuiKey_C] = ALLEGRO_KEY_C; - io.KeyMap[ImGuiKey_V] = ALLEGRO_KEY_V; - io.KeyMap[ImGuiKey_X] = ALLEGRO_KEY_X; - io.KeyMap[ImGuiKey_Y] = ALLEGRO_KEY_Y; - io.KeyMap[ImGuiKey_Z] = ALLEGRO_KEY_Z; - - io.RenderDrawListsFn = ImGui_ImplA5_RenderDrawLists; - + g_Display = display; + + ImGuiIO& io = ImGui::GetIO(); + io.KeyMap[ImGuiKey_Tab] = ALLEGRO_KEY_TAB; + io.KeyMap[ImGuiKey_LeftArrow] = ALLEGRO_KEY_LEFT; + io.KeyMap[ImGuiKey_RightArrow] = ALLEGRO_KEY_RIGHT; + io.KeyMap[ImGuiKey_UpArrow] = ALLEGRO_KEY_UP; + io.KeyMap[ImGuiKey_DownArrow] = ALLEGRO_KEY_DOWN; + io.KeyMap[ImGuiKey_Home] = ALLEGRO_KEY_HOME; + io.KeyMap[ImGuiKey_End] = ALLEGRO_KEY_END; + io.KeyMap[ImGuiKey_Delete] = ALLEGRO_KEY_DELETE; + io.KeyMap[ImGuiKey_Backspace] = ALLEGRO_KEY_BACKSPACE; + io.KeyMap[ImGuiKey_Enter] = ALLEGRO_KEY_ENTER; + io.KeyMap[ImGuiKey_Escape] = ALLEGRO_KEY_ESCAPE; + io.KeyMap[ImGuiKey_A] = ALLEGRO_KEY_A; + io.KeyMap[ImGuiKey_C] = ALLEGRO_KEY_C; + io.KeyMap[ImGuiKey_V] = ALLEGRO_KEY_V; + io.KeyMap[ImGuiKey_X] = ALLEGRO_KEY_X; + io.KeyMap[ImGuiKey_Y] = ALLEGRO_KEY_Y; + io.KeyMap[ImGuiKey_Z] = ALLEGRO_KEY_Z; + + io.RenderDrawListsFn = ImGui_ImplA5_RenderDrawLists; #ifdef _WIN32 - io.ImeWindowHandle = al_get_win_window_handle(disp); + io.ImeWindowHandle = al_get_win_window_handle(g_Display); #endif - return true; + return true; } - void ImGui_ImplA5_Shutdown() { - ImGui_ImplA5_InvalidateDeviceObjects(); - ImGui::Shutdown(); + ImGui_ImplA5_InvalidateDeviceObjects(); + ImGui::Shutdown(); } - -void ImGui_ImplA5_ProcessEvent(ALLEGRO_EVENT *ev) +bool ImGui_ImplA5_ProcessEvent(ALLEGRO_EVENT *ev) { - ImGuiIO &io = ImGui::GetIO(); - - switch (ev->type) { - case ALLEGRO_EVENT_MOUSE_AXES: - io.MouseWheel += ev->mouse.dz; - break; - case ALLEGRO_EVENT_KEY_CHAR: - if (ev->keyboard.display == g_disp) { - io.KeysDown[ev->keyboard.keycode] = true; - if (ev->keyboard.unichar > 0 && ev->keyboard.unichar < 0x10000) - io.AddInputCharacter((unsigned short)ev->keyboard.unichar); + ImGuiIO &io = ImGui::GetIO(); + + switch (ev->type) + { + case ALLEGRO_EVENT_MOUSE_AXES: + io.MouseWheel += ev->mouse.dz; + return true; + case ALLEGRO_EVENT_KEY_CHAR: + if (ev->keyboard.display == g_Display) + { + io.KeysDown[ev->keyboard.keycode] = true; + if (ev->keyboard.unichar > 0 && ev->keyboard.unichar < 0x10000) + io.AddInputCharacter((unsigned short)ev->keyboard.unichar); + } + return true; + case ALLEGRO_EVENT_KEY_UP: + if (ev->keyboard.display == g_Display) + io.KeysDown[ev->keyboard.keycode] = false; + return true; } - break; - case ALLEGRO_EVENT_KEY_UP: - if (ev->keyboard.display == g_disp) - io.KeysDown[ev->keyboard.keycode] = false; - break; - default: - break; - } + return false; } void ImGui_ImplA5_NewFrame() { - if (!g_img) Imgui_ImplA5_CreateDeviceObjects(); - - ImGuiIO &io = ImGui::GetIO(); - - int w, h; - w = al_get_display_width(g_disp); - h = al_get_display_height(g_disp); - io.DisplaySize = ImVec2((float)w, (float)h); - - double current_time = al_get_time(); - io.DeltaTime = g_time > 0.0 ? (float)(current_time - g_time) : (float)(1.0f/60.0f); - g_time = current_time; - - ALLEGRO_KEYBOARD_STATE keys; - al_get_keyboard_state(&keys); - io.KeyCtrl = al_key_down(&keys, ALLEGRO_KEYMOD_CTRL); - io.KeyShift = al_key_down(&keys, ALLEGRO_KEYMOD_SHIFT); - io.KeyAlt = al_key_down(&keys, ALLEGRO_KEYMOD_ALT); - - ALLEGRO_MOUSE_STATE mouse; - if (keys.display == g_disp) { + if (!g_Surface) + Imgui_ImplA5_CreateDeviceObjects(); + + ImGuiIO &io = ImGui::GetIO(); + + // Setup display size (every frame to accommodate for window resizing) + int w, h; + w = al_get_display_width(g_Display); + h = al_get_display_height(g_Display); + io.DisplaySize = ImVec2((float)w, (float)h); + + // Setup time step + double current_time = al_get_time(); + io.DeltaTime = g_Time > 0.0 ? (float)(current_time - g_Time) : (float)(1.0f/60.0f); + g_Time = current_time; + + // Setup inputs + ALLEGRO_KEYBOARD_STATE keys; + al_get_keyboard_state(&keys); + io.KeyCtrl = al_key_down(&keys, ALLEGRO_KEYMOD_CTRL); + io.KeyShift = al_key_down(&keys, ALLEGRO_KEYMOD_SHIFT); + io.KeyAlt = al_key_down(&keys, ALLEGRO_KEYMOD_ALT); + + ALLEGRO_MOUSE_STATE mouse; + if (keys.display == g_Display) + { + al_get_mouse_state(&mouse); + io.MousePos = ImVec2((float)mouse.x, (float)mouse.y); + } + else + { + io.MousePos = ImVec2(-1, -1); + } + al_get_mouse_state(&mouse); - io.MousePos = ImVec2((float)mouse.x, (float)mouse.y); - } - else { - io.MousePos = ImVec2(-1, -1); - } - - al_get_mouse_state(&mouse); - io.MouseDown[0] = mouse.buttons & 1; - io.MouseDown[1] = mouse.buttons & 2; - io.MouseDown[2] = mouse.buttons & 3; - - ImGui::NewFrame(); + io.MouseDown[0] = mouse.buttons & (1 << 0); + io.MouseDown[1] = mouse.buttons & (1 << 1); + io.MouseDown[2] = mouse.buttons & (1 << 2); + + // Start the frame + ImGui::NewFrame(); } diff --git a/examples/allegro5_example/imgui_impl_a5.h b/examples/allegro5_example/imgui_impl_a5.h index 04d006da0..e31ecfe77 100644 --- a/examples/allegro5_example/imgui_impl_a5.h +++ b/examples/allegro5_example/imgui_impl_a5.h @@ -11,7 +11,7 @@ bool ImGui_ImplA5_Init(ALLEGRO_DISPLAY* display); void ImGui_ImplA5_Shutdown(); void ImGui_ImplA5_NewFrame(); -void ImGui_ImplA5_ProcessEvent(ALLEGRO_EVENT* event); +bool ImGui_ImplA5_ProcessEvent(ALLEGRO_EVENT* event); // Use if you want to reset your rendering device without losing ImGui state. bool Imgui_ImplA5_CreateDeviceObjects();