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Examples: DirectX9 example application handle window resizing.

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ocornut
2015-03-09 14:13:29 +00:00
parent 25765e4bfc
commit 866fa95aaa
4 changed files with 76 additions and 41 deletions
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38
examples/directx9_example/imgui_impl_dx9.cpp
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@@ -10,6 +10,7 @@
#include <dinput.h>
// Data
static HWND g_hWnd = 0;
static INT64 g_Time = 0;
static INT64 g_TicksPerSecond = 0;
static bool g_FontTextureLoaded = false;
@@ -177,20 +178,15 @@ void ImGui_ImplDX9_InitFontsTexture()
bool ImGui_ImplDX9_Init(void* hwnd, IDirect3DDevice9* device)
{
g_hWnd = (HWND)hwnd;
g_pd3dDevice = device;
if (!QueryPerformanceFrequency((LARGE_INTEGER *)&g_TicksPerSecond))
return false;
if (!QueryPerformanceCounter((LARGE_INTEGER *)&g_Time))
return false;
// FIXME: resizing
RECT rect;
GetClientRect((HWND)hwnd, &rect);
int display_w = (int)(rect.right - rect.left);
int display_h = (int)(rect.bottom - rect.top);
ImGuiIO& io = ImGui::GetIO();
io.DisplaySize = ImVec2((float)display_w, (float)display_h); // Display size, in pixels. For clamping windows positions.
io.KeyMap[ImGuiKey_Tab] = VK_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array that we will update during the application lifetime.
io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
@@ -210,17 +206,18 @@ bool ImGui_ImplDX9_Init(void* hwnd, IDirect3DDevice9* device)
io.KeyMap[ImGuiKey_Z] = 'Z';
io.RenderDrawListsFn = ImGui_ImplDX9_RenderDrawLists;
io.ImeWindowHandle = hwnd;
io.ImeWindowHandle = g_hWnd;
// Create the vertex buffer
if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
return false;
return true;
}
void ImGui_ImplDX9_Shutdown()
void ImGui_ImplDX9_InvalidateDeviceObjects()
{
if (!g_pd3dDevice)
return;
if (g_pVB)
{
g_pVB->Release();
@@ -231,8 +228,24 @@ void ImGui_ImplDX9_Shutdown()
tex->Release();
ImGui::GetIO().Fonts->TexID = 0;
}
}
void ImGui_ImplDX9_CreateDeviceObjects()
{
if (!g_pd3dDevice)
return;
if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
return;
ImGui_ImplDX9_InitFontsTexture();
}
void ImGui_ImplDX9_Shutdown()
{
ImGui_ImplDX9_InvalidateDeviceObjects();
ImGui::Shutdown();
g_pd3dDevice = NULL;
g_hWnd = 0;
}
void ImGui_ImplDX9_NewFrame()
@@ -242,6 +255,11 @@ void ImGui_ImplDX9_NewFrame()
ImGuiIO& io = ImGui::GetIO();
// Setup display size (every frame to accommodate for window resizing)
RECT rect;
GetClientRect(g_hWnd, &rect);
io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
// Setup time step
INT64 current_time;
QueryPerformanceCounter((LARGE_INTEGER *)&current_time);