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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/Xutil.h>
#ifdef Bool
# undef Bool
#endif
#ifdef True
# undef True
#endif
#ifdef False
# undef False
#endif
#include "imgui.h"
#include "ImGuiImplLinuxX11.hpp"
#include "DebugUtilities.hpp"
namespace Diligent
{
ImGuiImplLinuxX11::ImGuiImplLinuxX11(IRenderDevice* pDevice,
TEXTURE_FORMAT BackBufferFmt,
TEXTURE_FORMAT DepthBufferFmt,
Uint32 DisplayWidth,
Uint32 DisplayHeight,
Uint32 InitialVertexBufferSize,
Uint32 InitialIndexBufferSize) :
ImGuiImplDiligent(pDevice, BackBufferFmt, DepthBufferFmt, InitialVertexBufferSize, InitialIndexBufferSize)
{
auto& io = ImGui::GetIO();
io.DisplaySize = ImVec2(DisplayWidth, DisplayHeight);
io.BackendPlatformName = "Diligent-ImGuiImplLinuxX11";
// Keyboard mapping. ImGui will use those indices to peek into the io.KeysDown[] array that we will update during the application lifetime.
io.KeyMap[ImGuiKey_Tab] = 256;
io.KeyMap[ImGuiKey_LeftArrow] = 257;
io.KeyMap[ImGuiKey_RightArrow] = 258;
io.KeyMap[ImGuiKey_UpArrow] = 259;
io.KeyMap[ImGuiKey_DownArrow] = 260;
io.KeyMap[ImGuiKey_PageUp] = 261;
io.KeyMap[ImGuiKey_PageDown] = 262;
io.KeyMap[ImGuiKey_Home] = 263;
io.KeyMap[ImGuiKey_End] = 264;
io.KeyMap[ImGuiKey_Insert] = 265;
io.KeyMap[ImGuiKey_Delete] = 266;
io.KeyMap[ImGuiKey_Backspace] = 267;
io.KeyMap[ImGuiKey_Space] = 268;
io.KeyMap[ImGuiKey_Enter] = 269;
//io.KeyMap[ImGuiKey_Escape] = 270;
io.KeyMap[ImGuiKey_KeyPadEnter] = 271;
io.KeyMap[ImGuiKey_A] = 'A';
io.KeyMap[ImGuiKey_C] = 'C';
io.KeyMap[ImGuiKey_V] = 'V';
io.KeyMap[ImGuiKey_X] = 'X';
io.KeyMap[ImGuiKey_Y] = 'Y';
io.KeyMap[ImGuiKey_Z] = 'Z';
m_LastTimestamp = std::chrono::high_resolution_clock::now();
}
ImGuiImplLinuxX11::~ImGuiImplLinuxX11()
{
}
void ImGuiImplLinuxX11::NewFrame(Uint32 RenderSurfaceWidth,
Uint32 RenderSurfaceHeight,
SURFACE_TRANSFORM SurfacePreTransform)
{
auto now = std::chrono::high_resolution_clock::now();
auto elapsed_ns = now - m_LastTimestamp;
m_LastTimestamp = now;
auto& io = ImGui::GetIO();
io.DeltaTime = static_cast<float>(elapsed_ns.count() / 1e+9);
VERIFY(io.DisplaySize.x == 0 || io.DisplaySize.x == static_cast<float>(RenderSurfaceWidth), "io.DisplaySize.x (",
io.DisplaySize.x, " does not match RenderSurfaceWidth (", RenderSurfaceWidth, ")");
VERIFY(io.DisplaySize.y == 0 || io.DisplaySize.y == static_cast<float>(RenderSurfaceHeight), "io.DisplaySize.y (",
io.DisplaySize.y, " does not match RenderSurfaceHeight (", RenderSurfaceHeight, ")");
ImGuiImplDiligent::NewFrame(RenderSurfaceWidth, RenderSurfaceHeight, SurfacePreTransform);
}
bool ImGuiImplLinuxX11::HandleXEvent(XEvent* event)
{
auto& io = ImGui::GetIO();
switch (event->type)
{
case ButtonPress:
case ButtonRelease:
{
bool IsPressed = event->type == ButtonPress;
auto* xbe = reinterpret_cast<XButtonEvent*>(event);
switch (xbe->button)
{
case Button1: io.MouseDown[0] = IsPressed; break; // Left
case Button2: io.MouseDown[2] = IsPressed; break; // Middle
case Button3: io.MouseDown[1] = IsPressed; break; // Right
case Button4: io.MouseWheel += 1; break;
case Button5: io.MouseWheel -= 1; break;
}
return io.WantCaptureMouse;
}
case MotionNotify:
{
XMotionEvent* xme = (XMotionEvent*)event;
io.MousePos = ImVec2(xme->x, xme->y);
return io.WantCaptureMouse;
}
case ConfigureNotify:
{
XConfigureEvent* xce = (XConfigureEvent*)event;
io.DisplaySize = ImVec2(xce->width, xce->height);
return false;
}
case KeyPress:
case KeyRelease:
{
bool IsPressed = event->type == KeyPress;
io.KeyCtrl = (event->xkey.state & ControlMask) != 0;
io.KeyShift = (event->xkey.state & ShiftMask) != 0;
io.KeyAlt = (event->xkey.state & Mod1Mask) != 0;
KeySym keysym = 0;
constexpr int buff_sz = 80;
char buffer[buff_sz];
int num_char = XLookupString((XKeyEvent*)event, buffer, buff_sz, &keysym, 0);
int k = 0;
switch (keysym)
{
// clang-format off
case XK_Tab: k = io.KeyMap[ImGuiKey_Tab]; break;
case XK_Left: k = io.KeyMap[ImGuiKey_LeftArrow]; break;
case XK_Right: k = io.KeyMap[ImGuiKey_RightArrow]; break;
case XK_Up: k = io.KeyMap[ImGuiKey_UpArrow]; break;
case XK_Down: k = io.KeyMap[ImGuiKey_DownArrow]; break;
case XK_Page_Up: k = io.KeyMap[ImGuiKey_PageUp]; break;
case XK_Page_Down: k = io.KeyMap[ImGuiKey_PageDown]; break;
case XK_Home: k = io.KeyMap[ImGuiKey_Home]; break;
case XK_End: k = io.KeyMap[ImGuiKey_End]; break;
case XK_Insert: k = io.KeyMap[ImGuiKey_Insert]; break;
case XK_Delete: k = io.KeyMap[ImGuiKey_Delete]; break;
case XK_BackSpace: k = io.KeyMap[ImGuiKey_Backspace]; break;
//case XK_space: k = io.KeyMap[ImGuiKey_Space]; break;
case XK_Return: k = io.KeyMap[ImGuiKey_Enter]; break;
case XK_Escape: k = io.KeyMap[ImGuiKey_Escape]; break;
case XK_KP_Enter: k = io.KeyMap[ImGuiKey_KeyPadEnter];break;
// clang-format on
}
if (k != 0)
io.KeysDown[k] = IsPressed;
if (k == 0 && IsPressed)
{
for (int i = 0; i < num_char; ++i)
io.AddInputCharacter(buffer[i]);
}
return io.WantCaptureKeyboard;
}
default:
break;
}
return false;
}
} // namespace Diligent
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