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Examples: Allegro5, Marmalade: Moved bindings to parent folder. Renamed Allegro stuff from *A5_ to *Allegro5_

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omar
2018-02-16 23:54:57 +01:00
parent 80a8aea7e3
commit 6d0f9244b8
7 changed files with 30 additions and 30 deletions
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305
examples/allegro5_example/imgui_impl_a5.cpp
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// ImGui Allegro 5 bindings
// Implemented features:
// [X] User texture binding. Use 'ALLEGRO_BITMAP*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
// Missing features:
// [ ] Clipboard support via al_set_clipboard_text/al_clipboard_has_text.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
// If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
// https://github.com/ocornut/imgui, Original code by @birthggd
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplA5_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 <stdint.h> // uint64_t
#include <cstring> // memcpy
#include "imgui.h"
#include "imgui_impl_a5.h"
#include <allegro5/allegro.h>
#include <allegro5/allegro_primitives.h>
#ifdef _WIN32
#include <allegro5/allegro_windows.h>
#endif
// Data
static ALLEGRO_DISPLAY* g_Display = NULL;
static ALLEGRO_BITMAP* g_Texture = NULL;
static double g_Time = 0.0;
static ALLEGRO_MOUSE_CURSOR* g_MouseCursorInvisible = NULL;
static ALLEGRO_VERTEX_DECL* g_VertexDecl = NULL;
struct ImDrawVertAllegro
{
ImVec2 pos;
ImVec2 uv;
ALLEGRO_COLOR col;
};
// Render function.
// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
void ImGui_ImplA5_RenderDrawData(ImDrawData* draw_data)
{
int op, src, dst;
al_get_blender(&op, &src, &dst);
al_set_blender(ALLEGRO_ADD, ALLEGRO_ALPHA, ALLEGRO_INVERSE_ALPHA);
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
// FIXME-OPT: Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 floats
static ImVector<ImDrawVertAllegro> vertices;
vertices.resize(cmd_list->VtxBuffer.Size);
for (int i = 0; i < cmd_list->VtxBuffer.Size; ++i)
{
const ImDrawVert &dv = cmd_list->VtxBuffer[i];
ImDrawVertAllegro v;
v.pos = dv.pos;
v.uv = dv.uv;
unsigned char *c = (unsigned char*)&dv.col;
v.col = al_map_rgba(c[0], c[1], c[2], c[3]);
vertices[i] = v;
}
// FIXME-OPT: Unfortunately Allegro doesn't support 16-bit indices
// You can also use '#define ImDrawIdx unsigned int' in imconfig.h and request ImGui to output 32-bit indices
static ImVector<int> indices;
indices.resize(cmd_list->IdxBuffer.Size);
for (int i = 0; i < cmd_list->IdxBuffer.Size; ++i)
indices[i] = (int)cmd_list->IdxBuffer.Data[i];
int idx_offset = 0;
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
if (pcmd->UserCallback)
{
pcmd->UserCallback(cmd_list, pcmd);
}
else
{
ALLEGRO_BITMAP* texture = (ALLEGRO_BITMAP*)pcmd->TextureId;
al_set_clipping_rectangle(pcmd->ClipRect.x, pcmd->ClipRect.y, pcmd->ClipRect.z-pcmd->ClipRect.x, pcmd->ClipRect.w-pcmd->ClipRect.y);
al_draw_indexed_prim(&vertices[0], g_VertexDecl, texture, &indices[idx_offset], pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST);
}
idx_offset += pcmd->ElemCount;
}
}
// Restore modified 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()
{
// Build texture atlas
ImGuiIO &io = ImGui::GetIO();
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);
if (!cloned_img)
return false;
// Store our identifier
io.Fonts->TexID = (void*)cloned_img;
g_Texture = cloned_img;
// 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);
g_MouseCursorInvisible = al_create_mouse_cursor(mouse_cursor, 0, 0);
al_destroy_bitmap(mouse_cursor);
return true;
}
void ImGui_ImplA5_InvalidateDeviceObjects()
{
if (g_Texture)
{
al_destroy_bitmap(g_Texture);
ImGui::GetIO().Fonts->TexID = NULL;
g_Texture = NULL;
}
if (g_MouseCursorInvisible)
{
al_destroy_mouse_cursor(g_MouseCursorInvisible);
g_MouseCursorInvisible = NULL;
}
}
bool ImGui_ImplA5_Init(ALLEGRO_DISPLAY* display)
{
g_Display = display;
// Create custom vertex declaration.
// Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 floats.
// We still use a custom declaration to use 'ALLEGRO_PRIM_TEX_COORD' instead of 'ALLEGRO_PRIM_TEX_COORD_PIXEL' else we can't do a reliable conversion.
ALLEGRO_VERTEX_ELEMENT elems[] =
{
{ ALLEGRO_PRIM_POSITION, ALLEGRO_PRIM_FLOAT_2, IM_OFFSETOF(ImDrawVertAllegro, pos) },
{ ALLEGRO_PRIM_TEX_COORD, ALLEGRO_PRIM_FLOAT_2, IM_OFFSETOF(ImDrawVertAllegro, uv) },
{ ALLEGRO_PRIM_COLOR_ATTR, 0, IM_OFFSETOF(ImDrawVertAllegro, col) },
{ 0, 0, 0 }
};
g_VertexDecl = al_create_vertex_decl(elems, sizeof(ImDrawVertAllegro));
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_PageUp] = ALLEGRO_KEY_PGUP;
io.KeyMap[ImGuiKey_PageDown] = ALLEGRO_KEY_PGDN;
io.KeyMap[ImGuiKey_Home] = ALLEGRO_KEY_HOME;
io.KeyMap[ImGuiKey_End] = ALLEGRO_KEY_END;
io.KeyMap[ImGuiKey_Insert] = ALLEGRO_KEY_INSERT;
io.KeyMap[ImGuiKey_Delete] = ALLEGRO_KEY_DELETE;
io.KeyMap[ImGuiKey_Backspace] = ALLEGRO_KEY_BACKSPACE;
io.KeyMap[ImGuiKey_Space] = ALLEGRO_KEY_SPACE;
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;
#ifdef _WIN32
io.ImeWindowHandle = al_get_win_window_handle(g_Display);
#endif
return true;
}
void ImGui_ImplA5_Shutdown()
{
ImGui_ImplA5_InvalidateDeviceObjects();
}
// 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.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
bool ImGui_ImplA5_ProcessEvent(ALLEGRO_EVENT *ev)
{
ImGuiIO &io = ImGui::GetIO();
switch (ev->type)
{
case ALLEGRO_EVENT_MOUSE_AXES:
io.MouseWheel += ev->mouse.dz;
io.MouseWheelH += ev->mouse.dw;
return true;
case ALLEGRO_EVENT_KEY_CHAR:
if (ev->keyboard.display == g_Display)
if (ev->keyboard.unichar > 0 && ev->keyboard.unichar < 0x10000)
io.AddInputCharacter((unsigned short)ev->keyboard.unichar);
return true;
case ALLEGRO_EVENT_KEY_DOWN:
case ALLEGRO_EVENT_KEY_UP:
if (ev->keyboard.display == g_Display)
io.KeysDown[ev->keyboard.keycode] = (ev->type == ALLEGRO_EVENT_KEY_DOWN);
return true;
}
return false;
}
void ImGui_ImplA5_NewFrame()
{
if (!g_Texture)
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_KEY_LCTRL) || al_key_down(&keys, ALLEGRO_KEY_RCTRL);
io.KeyShift = al_key_down(&keys, ALLEGRO_KEY_LSHIFT) || al_key_down(&keys, ALLEGRO_KEY_RSHIFT);
io.KeyAlt = al_key_down(&keys, ALLEGRO_KEY_ALT) || al_key_down(&keys, ALLEGRO_KEY_ALTGR);
io.KeySuper = al_key_down(&keys, ALLEGRO_KEY_LWIN) || al_key_down(&keys, ALLEGRO_KEY_RWIN);
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(-FLT_MAX, -FLT_MAX);
}
al_get_mouse_state(&mouse);
io.MouseDown[0] = mouse.buttons & (1 << 0);
io.MouseDown[1] = mouse.buttons & (1 << 1);
io.MouseDown[2] = mouse.buttons & (1 << 2);
// Hide OS mouse cursor if ImGui is drawing it
if (io.MouseDrawCursor)
{
al_set_mouse_cursor(g_Display, g_MouseCursorInvisible);
}
else
{
ALLEGRO_SYSTEM_MOUSE_CURSOR cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_DEFAULT;
switch (ImGui::GetMouseCursor())
{
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;
}
al_set_system_mouse_cursor(g_Display, cursor_id);
}
// Start the frame. This call will update the io.WantCaptureMouse, io.WantCaptureKeyboard flag that you can use to dispatch inputs (or not) to your application.
ImGui::NewFrame();
}

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examples/allegro5_example/imgui_impl_a5.h
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// ImGui Allegro 5 bindings
// Implemented features:
// [X] User texture binding. Use 'ALLEGRO_BITMAP*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
// Missing features:
// [ ] Clipboard support via al_set_clipboard_text/al_clipboard_has_text.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
// If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
// https://github.com/ocornut/imgui, Original code by @birthggd
#pragma once
struct ALLEGRO_DISPLAY;
union ALLEGRO_EVENT;
IMGUI_API bool ImGui_ImplA5_Init(ALLEGRO_DISPLAY* display);
IMGUI_API void ImGui_ImplA5_Shutdown();
IMGUI_API void ImGui_ImplA5_NewFrame();
IMGUI_API void ImGui_ImplA5_RenderDrawData(ImDrawData* draw_data);
IMGUI_API bool ImGui_ImplA5_ProcessEvent(ALLEGRO_EVENT* event);
// Use if you want to reset your rendering device without losing ImGui state.
IMGUI_API bool Imgui_ImplA5_CreateDeviceObjects();
IMGUI_API void ImGui_ImplA5_InvalidateDeviceObjects();

16
examples/allegro5_example/main.cpp
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@ -5,7 +5,7 @@
#include <allegro5/allegro.h>
#include <allegro5/allegro_primitives.h>
#include "imgui.h"
#include "imgui_impl_a5.h"
#include "../imgui_impl_allegro5.h"
int main(int, char**)
{
@ -25,7 +25,7 @@ int main(int, char**)
// Setup ImGui binding
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
ImGui_ImplA5_Init(display);
ImGui_ImplAllegro5_Init(display);
//io.NavFlags |= ImGuiNavFlags_EnableKeyboard; // Enable Keyboard Controls
// Setup style
@ -62,17 +62,17 @@ int main(int, char**)
ALLEGRO_EVENT ev;
while (al_get_next_event(queue, &ev))
{
ImGui_ImplA5_ProcessEvent(&ev);
ImGui_ImplAllegro5_ProcessEvent(&ev);
if (ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE)
running = false;
if (ev.type == ALLEGRO_EVENT_DISPLAY_RESIZE)
{
ImGui_ImplA5_InvalidateDeviceObjects();
ImGui_ImplAllegro5_InvalidateDeviceObjects();
al_acknowledge_resize(display);
Imgui_ImplA5_CreateDeviceObjects();
ImGui_ImplAllegro5_CreateDeviceObjects();
}
}
ImGui_ImplA5_NewFrame();
ImGui_ImplAllegro5_NewFrame();
// 1. Show a simple window.
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
@ -114,12 +114,12 @@ int main(int, char**)
// Rendering
al_clear_to_color(al_map_rgba_f(clear_color.x, clear_color.y, clear_color.z, clear_color.w));
ImGui::Render();
ImGui_ImplA5_RenderDrawData(ImGui::GetDrawData());
ImGui_ImplAllegro5_RenderDrawData(ImGui::GetDrawData());
al_flip_display();
}
// Cleanup
ImGui_ImplA5_Shutdown();
ImGui_ImplAllegro5_Shutdown();
ImGui::DestroyContext();
al_destroy_event_queue(queue);
al_destroy_display(display);