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OpenGL/DirextX examples: comments and tweaks.

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This commit is contained in:
ocornut 2014-09-30 10:09:44 +01:00
parent f86286548e
commit ec625b7c49
2 changed files with 97 additions and 95 deletions
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76
examples/directx9_example/main.cpp
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@ -168,11 +168,9 @@ LRESULT WINAPI MsgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
io.AddInputCharacter((unsigned short)wParam); io.AddInputCharacter((unsigned short)wParam);
return true; return true;
case WM_DESTROY: case WM_DESTROY:
{ Cleanup();
Cleanup(); PostQuitMessage(0);
PostQuitMessage(0); return 0;
return 0;
}
} }
return DefWindowProc(hWnd, msg, wParam, lParam); return DefWindowProc(hWnd, msg, wParam, lParam);
} }
@ -180,14 +178,14 @@ LRESULT WINAPI MsgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
// Notify OS Input Method Editor of text input position (e.g. when using Japanese/Chinese inputs, otherwise this isn't needed) // Notify OS Input Method Editor of text input position (e.g. when using Japanese/Chinese inputs, otherwise this isn't needed)
static void ImImpl_ImeSetInputScreenPosFn(int x, int y) static void ImImpl_ImeSetInputScreenPosFn(int x, int y)
{ {
if (HIMC himc = ImmGetContext(hWnd)) if (HIMC himc = ImmGetContext(hWnd))
{ {
COMPOSITIONFORM cf; COMPOSITIONFORM cf;
cf.ptCurrentPos.x = x; cf.ptCurrentPos.x = x;
cf.ptCurrentPos.y = y; cf.ptCurrentPos.y = y;
cf.dwStyle = CFS_FORCE_POSITION; cf.dwStyle = CFS_FORCE_POSITION;
ImmSetCompositionWindow(himc, &cf); ImmSetCompositionWindow(himc, &cf);
} }
} }
void InitImGui() void InitImGui()
@ -218,7 +216,7 @@ void InitImGui()
io.KeyMap[ImGuiKey_Z] = 'Z'; io.KeyMap[ImGuiKey_Z] = 'Z';
io.RenderDrawListsFn = ImImpl_RenderDrawLists; io.RenderDrawListsFn = ImImpl_RenderDrawLists;
io.ImeSetInputScreenPosFn = ImImpl_ImeSetInputScreenPosFn; io.ImeSetInputScreenPosFn = ImImpl_ImeSetInputScreenPosFn;
// Create the vertex buffer // Create the vertex buffer
if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0) if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
@ -310,36 +308,31 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
UpdateImGui(); UpdateImGui();
// Create a simple window
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
static bool show_test_window = true; static bool show_test_window = true;
static bool show_another_window = false; static bool show_another_window = false;
static float f;
ImGui::Text("Hello, world!");
ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
show_test_window ^= ImGui::Button("Test Window");
show_another_window ^= ImGui::Button("Another Window");
// Calculate and show framerate // 1. Show a simple window
static float ms_per_frame[120] = { 0 }; // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
static int ms_per_frame_idx = 0;
static float ms_per_frame_accum = 0.0f;
ms_per_frame_accum -= ms_per_frame[ms_per_frame_idx];
ms_per_frame[ms_per_frame_idx] = ImGui::GetIO().DeltaTime * 1000.0f;
ms_per_frame_accum += ms_per_frame[ms_per_frame_idx];
ms_per_frame_idx = (ms_per_frame_idx + 1) % 120;
const float ms_per_frame_avg = ms_per_frame_accum / 120;
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", ms_per_frame_avg, 1000.0f / ms_per_frame_avg);
// Show the ImGui test window
// Most of user example code is in ImGui::ShowTestWindow()
if (show_test_window)
{ {
ImGui::SetNewWindowDefaultPos(ImVec2(650, 20)); // Normally user code doesn't need/want to call it because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly! static float f;
ImGui::ShowTestWindow(&show_test_window); ImGui::Text("Hello, world!");
ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
show_test_window ^= ImGui::Button("Test Window");
show_another_window ^= ImGui::Button("Another Window");
// Calculate and show framerate
static float ms_per_frame[120] = { 0 };
static int ms_per_frame_idx = 0;
static float ms_per_frame_accum = 0.0f;
ms_per_frame_accum -= ms_per_frame[ms_per_frame_idx];
ms_per_frame[ms_per_frame_idx] = ImGui::GetIO().DeltaTime * 1000.0f;
ms_per_frame_accum += ms_per_frame[ms_per_frame_idx];
ms_per_frame_idx = (ms_per_frame_idx + 1) % 120;
const float ms_per_frame_avg = ms_per_frame_accum / 120;
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", ms_per_frame_avg, 1000.0f / ms_per_frame_avg);
} }
// Show another simple window // 2. Show another simple window, this time using an explicit Begin/End pair
if (show_another_window) if (show_another_window)
{ {
ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100)); ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100));
@ -347,6 +340,13 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
ImGui::End(); ImGui::End();
} }
// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
if (show_test_window)
{
ImGui::SetNewWindowDefaultPos(ImVec2(650, 20)); // Normally user code doesn't need/want to call it because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
ImGui::ShowTestWindow(&show_test_window);
}
// Rendering // Rendering
g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, false); g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, false);
g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, false); g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, false);

114
examples/opengl_example/main.cpp
View File

@ -95,15 +95,15 @@ static void ImImpl_SetClipboardTextFn(const char* text)
// Notify OS Input Method Editor of text input position (e.g. when using Japanese/Chinese inputs, otherwise this isn't needed) // Notify OS Input Method Editor of text input position (e.g. when using Japanese/Chinese inputs, otherwise this isn't needed)
static void ImImpl_ImeSetInputScreenPosFn(int x, int y) static void ImImpl_ImeSetInputScreenPosFn(int x, int y)
{ {
HWND hwnd = glfwGetWin32Window(window); HWND hwnd = glfwGetWin32Window(window);
if (HIMC himc = ImmGetContext(hwnd)) if (HIMC himc = ImmGetContext(hwnd))
{ {
COMPOSITIONFORM cf; COMPOSITIONFORM cf;
cf.ptCurrentPos.x = x; cf.ptCurrentPos.x = x;
cf.ptCurrentPos.y = y; cf.ptCurrentPos.y = y;
cf.dwStyle = CFS_FORCE_POSITION; cf.dwStyle = CFS_FORCE_POSITION;
ImmSetCompositionWindow(himc, &cf); ImmSetCompositionWindow(himc, &cf);
} }
} }
#endif #endif
@ -115,8 +115,8 @@ static void glfw_error_callback(int error, const char* description)
static void glfw_mouse_button_callback(GLFWwindow* window, int button, int action, int mods) static void glfw_mouse_button_callback(GLFWwindow* window, int button, int action, int mods)
{ {
if (action == GLFW_PRESS && button >= 0 && button < 2) if (action == GLFW_PRESS && button >= 0 && button < 2)
mousePressed[button] = true; mousePressed[button] = true;
} }
static void glfw_scroll_callback(GLFWwindow* window, double xoffset, double yoffset) static void glfw_scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
@ -154,7 +154,7 @@ void InitGL()
window = glfwCreateWindow(1280, 720, "ImGui OpenGL example", NULL, NULL); window = glfwCreateWindow(1280, 720, "ImGui OpenGL example", NULL, NULL);
glfwMakeContextCurrent(window); glfwMakeContextCurrent(window);
glfwSetKeyCallback(window, glfw_key_callback); glfwSetKeyCallback(window, glfw_key_callback);
glfwSetMouseButtonCallback(window, glfw_mouse_button_callback); glfwSetMouseButtonCallback(window, glfw_mouse_button_callback);
glfwSetScrollCallback(window, glfw_scroll_callback); glfwSetScrollCallback(window, glfw_scroll_callback);
glfwSetCharCallback(window, glfw_char_callback); glfwSetCharCallback(window, glfw_char_callback);
@ -196,7 +196,7 @@ void InitImGui()
io.SetClipboardTextFn = ImImpl_SetClipboardTextFn; io.SetClipboardTextFn = ImImpl_SetClipboardTextFn;
io.GetClipboardTextFn = ImImpl_GetClipboardTextFn; io.GetClipboardTextFn = ImImpl_GetClipboardTextFn;
#ifdef _MSC_VER #ifdef _MSC_VER
io.ImeSetInputScreenPosFn = ImImpl_ImeSetInputScreenPosFn; io.ImeSetInputScreenPosFn = ImImpl_ImeSetInputScreenPosFn;
#endif #endif
// Load font texture // Load font texture
@ -206,35 +206,35 @@ void InitImGui()
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
#if 1 #if 1
// Default font (embedded in code) // Default font (embedded in code)
const void* png_data; const void* png_data;
unsigned int png_size; unsigned int png_size;
ImGui::GetDefaultFontData(NULL, NULL, &png_data, &png_size); ImGui::GetDefaultFontData(NULL, NULL, &png_data, &png_size);
int tex_x, tex_y, tex_comp; int tex_x, tex_y, tex_comp;
void* tex_data = stbi_load_from_memory((const unsigned char*)png_data, (int)png_size, &tex_x, &tex_y, &tex_comp, 0); void* tex_data = stbi_load_from_memory((const unsigned char*)png_data, (int)png_size, &tex_x, &tex_y, &tex_comp, 0);
IM_ASSERT(tex_data != NULL); IM_ASSERT(tex_data != NULL);
#else #else
// Custom font from filesystem // Custom font from filesystem
io.Font = new ImBitmapFont(); io.Font = new ImBitmapFont();
io.Font->LoadFromFile("../../extra_fonts/mplus-2m-medium_18.fnt"); io.Font->LoadFromFile("../../extra_fonts/mplus-2m-medium_18.fnt");
IM_ASSERT(io.Font->IsLoaded()); IM_ASSERT(io.Font->IsLoaded());
int tex_x, tex_y, tex_comp; int tex_x, tex_y, tex_comp;
void* tex_data = stbi_load("../../extra_fonts/mplus-2m-medium_18.png", &tex_x, &tex_y, &tex_comp, 0); void* tex_data = stbi_load("../../extra_fonts/mplus-2m-medium_18.png", &tex_x, &tex_y, &tex_comp, 0);
IM_ASSERT(tex_data != NULL); IM_ASSERT(tex_data != NULL);
// Automatically find white pixel from the texture we just loaded // Automatically find white pixel from the texture we just loaded
// (io.FontTexUvForWhite needs to contains UV coordinates pointing to a white pixel in order to render solid objects) // (io.FontTexUvForWhite needs to contains UV coordinates pointing to a white pixel in order to render solid objects)
for (int tex_data_off = 0; tex_data_off < tex_x*tex_y; tex_data_off++) for (int tex_data_off = 0; tex_data_off < tex_x*tex_y; tex_data_off++)
if (((unsigned int*)tex_data)[tex_data_off] == 0xffffffff) if (((unsigned int*)tex_data)[tex_data_off] == 0xffffffff)
{ {
io.FontTexUvForWhite = ImVec2((float)(tex_data_off % tex_x)/(tex_x), (float)(tex_data_off / tex_x)/(tex_y)); io.FontTexUvForWhite = ImVec2((float)(tex_data_off % tex_x)/(tex_x), (float)(tex_data_off / tex_x)/(tex_y));
break; break;
} }
#endif #endif
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex_x, tex_y, 0, GL_RGBA, GL_UNSIGNED_BYTE, tex_data); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex_x, tex_y, 0, GL_RGBA, GL_UNSIGNED_BYTE, tex_data);
stbi_image_free(tex_data); stbi_image_free(tex_data);
} }
void UpdateImGui() void UpdateImGui()
@ -252,7 +252,7 @@ void UpdateImGui()
double mouse_x, mouse_y; double mouse_x, mouse_y;
glfwGetCursorPos(window, &mouse_x, &mouse_y); glfwGetCursorPos(window, &mouse_x, &mouse_y);
io.MousePos = ImVec2((float)mouse_x * mousePosScale.x, (float)mouse_y * mousePosScale.y); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.) io.MousePos = ImVec2((float)mouse_x * mousePosScale.x, (float)mouse_y * mousePosScale.y); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
io.MouseDown[0] = mousePressed[0] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) != 0; // If a mouse press event came, always pass it, so we don't miss click-release events that are shorted than our frame. io.MouseDown[0] = mousePressed[0] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) != 0; // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
io.MouseDown[1] = mousePressed[1] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) != 0; io.MouseDown[1] = mousePressed[1] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) != 0;
// Start the frame // Start the frame
@ -268,41 +268,36 @@ int main(int argc, char** argv)
while (!glfwWindowShouldClose(window)) while (!glfwWindowShouldClose(window))
{ {
ImGuiIO& io = ImGui::GetIO(); ImGuiIO& io = ImGui::GetIO();
mousePressed[0] = mousePressed[1] = false; mousePressed[0] = mousePressed[1] = false;
io.MouseWheel = 0; io.MouseWheel = 0;
glfwPollEvents(); glfwPollEvents();
UpdateImGui(); UpdateImGui();
// Create a simple window
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
static bool show_test_window = true; static bool show_test_window = true;
static bool show_another_window = false; static bool show_another_window = false;
static float f;
ImGui::Text("Hello, world!");
ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
show_test_window ^= ImGui::Button("Test Window");
show_another_window ^= ImGui::Button("Another Window");
// Calculate and show framerate // 1. Show a simple window
static float ms_per_frame[120] = { 0 }; // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
static int ms_per_frame_idx = 0;
static float ms_per_frame_accum = 0.0f;
ms_per_frame_accum -= ms_per_frame[ms_per_frame_idx];
ms_per_frame[ms_per_frame_idx] = ImGui::GetIO().DeltaTime * 1000.0f;
ms_per_frame_accum += ms_per_frame[ms_per_frame_idx];
ms_per_frame_idx = (ms_per_frame_idx + 1) % 120;
const float ms_per_frame_avg = ms_per_frame_accum / 120;
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", ms_per_frame_avg, 1000.0f / ms_per_frame_avg);
// Show the ImGui test window
// Most of user example code is in ImGui::ShowTestWindow()
if (show_test_window)
{ {
ImGui::SetNewWindowDefaultPos(ImVec2(650, 20)); // Normally user code doesn't need/want to call it because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly! static float f;
ImGui::ShowTestWindow(&show_test_window); ImGui::Text("Hello, world!");
ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
show_test_window ^= ImGui::Button("Test Window");
show_another_window ^= ImGui::Button("Another Window");
// Calculate and show framerate
static float ms_per_frame[120] = { 0 };
static int ms_per_frame_idx = 0;
static float ms_per_frame_accum = 0.0f;
ms_per_frame_accum -= ms_per_frame[ms_per_frame_idx];
ms_per_frame[ms_per_frame_idx] = ImGui::GetIO().DeltaTime * 1000.0f;
ms_per_frame_accum += ms_per_frame[ms_per_frame_idx];
ms_per_frame_idx = (ms_per_frame_idx + 1) % 120;
const float ms_per_frame_avg = ms_per_frame_accum / 120;
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", ms_per_frame_avg, 1000.0f / ms_per_frame_avg);
} }
// Show another simple window // 2. Show another simple window, this time using an explicit Begin/End pair
if (show_another_window) if (show_another_window)
{ {
ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100)); ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100));
@ -310,6 +305,13 @@ int main(int argc, char** argv)
ImGui::End(); ImGui::End();
} }
// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
if (show_test_window)
{
ImGui::SetNewWindowDefaultPos(ImVec2(650, 20)); // Normally user code doesn't need/want to call this, because positions are saved in .ini file. Here we just want to make the demo initial state a bit more friendly!
ImGui::ShowTestWindow(&show_test_window);
}
// Rendering // Rendering
glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y); glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
glClearColor(0.8f, 0.6f, 0.6f, 1.0f); glClearColor(0.8f, 0.6f, 0.6f, 1.0f);