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Commented samples and shuffled bits of the initialisation based on user's feedback.

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This commit is contained in:
ocornut 2014-08-11 15:02:33 +01:00
parent 8ab2942716
commit 86d2c9d232
3 changed files with 88 additions and 74 deletions
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39
examples/directx9_example/main.cpp
View File

@ -203,17 +203,6 @@ HRESULT InitD3D(HWND hWnd)
if (g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &d3dpp, &g_pd3dDevice) < 0)
return E_FAIL;
// Create the vertex buffer.
if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
return E_FAIL;
// Load font texture
const void* png_data;
unsigned int png_size;
ImGui::GetDefaultFontData(NULL, NULL, &png_data, &png_size);
if (D3DXCreateTextureFromFileInMemory(g_pd3dDevice, png_data, png_size, &g_pTexture) < 0)
return E_FAIL;
return S_OK;
}
@ -247,9 +236,11 @@ LRESULT WINAPI MsgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
io.MouseDown[1] = false;
return true;
case WM_MOUSEWHEEL:
// Mouse wheel: -1,0,+1
io.MouseWheel = GET_WHEEL_DELTA_WPARAM(wParam) > 0 ? +1 : -1;
return true;
case WM_MOUSEMOVE:
// Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
io.MousePos.x = (signed short)(lParam);
io.MousePos.y = (signed short)(lParam >> 16);
return true;
@ -274,9 +265,10 @@ void InitImGui()
GetClientRect(hWnd, &rect);
ImGuiIO& io = ImGui::GetIO();
io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
io.DeltaTime = 1.0f/60.0f;
io.KeyMap[ImGuiKey_Tab] = VK_TAB;
io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top)); // Display size, in pixels. For clamping windows positions.
io.DeltaTime = 1.0f/60.0f; // Time elapsed since last frame, in seconds (in this sample app we'll override this every frame because our timestep is variable)
io.PixelCenterOffset = 0.0f; // Align Direct3D Texels
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;
io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
@ -293,11 +285,28 @@ void InitImGui()
io.KeyMap[ImGuiKey_X] = 'X';
io.KeyMap[ImGuiKey_Y] = 'Y';
io.KeyMap[ImGuiKey_Z] = 'Z';
io.PixelCenterOffset = 0.0f;
io.RenderDrawListsFn = ImImpl_RenderDrawLists;
io.SetClipboardTextFn = ImImpl_SetClipboardTextFn;
io.GetClipboardTextFn = ImImpl_GetClipboardTextFn;
// Create the vertex buffer
if (g_pd3dDevice->CreateVertexBuffer(10000 * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
{
IM_ASSERT(0);
return;
}
// Load font texture
const void* png_data;
unsigned int png_size;
ImGui::GetDefaultFontData(NULL, NULL, &png_data, &png_size);
if (D3DXCreateTextureFromFileInMemory(g_pd3dDevice, png_data, png_size, &g_pTexture) < 0)
{
IM_ASSERT(0);
return;
}
}
int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)

121
examples/opengl_example/main.cpp
View File

@ -217,58 +217,6 @@ void InitGL()
glewInit();
GLenum err = GL_NO_ERROR;
GLint status = GL_TRUE;
err = glGetError(); IM_ASSERT(err == GL_NO_ERROR);
// Create and compile the vertex shader
vertexShader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertexShader, 1, &vertexSource, NULL);
glCompileShader(vertexShader);
glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &status);
if (status != GL_TRUE)
{
char buffer[512];
glGetShaderInfoLog(vertexShader, 1024, NULL, buffer);
printf("%s", buffer);
IM_ASSERT(status == GL_TRUE);
}
// Create and compile the fragment shader
fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fragmentShader, 1, &fragmentSource, NULL);
glCompileShader(fragmentShader);
glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &status);
IM_ASSERT(status == GL_TRUE);
// Link the vertex and fragment shader into a shader program
shaderProgram = glCreateProgram();
glAttachShader(shaderProgram, vertexShader);
glAttachShader(shaderProgram, fragmentShader);
glBindFragDataLocation(shaderProgram, 0, "o_col");
glLinkProgram(shaderProgram);
glGetProgramiv(shaderProgram, GL_LINK_STATUS, &status);
IM_ASSERT(status == GL_TRUE);
uniMVP = glGetUniformLocation(shaderProgram, "MVP");
uniClipRect = glGetUniformLocation(shaderProgram, "ClipRect");
// Create Vertex Buffer Objects & Vertex Array Objects
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
GLint posAttrib = glGetAttribLocation(shaderProgram, "i_pos");
glVertexAttribPointer(posAttrib, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), 0);
glEnableVertexAttribArray(posAttrib);
GLint uvAttrib = glGetAttribLocation(shaderProgram, "i_uv");
glEnableVertexAttribArray(uvAttrib);
glVertexAttribPointer(uvAttrib, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (void*)(2*sizeof(float)));
GLint colAttrib = glGetAttribLocation(shaderProgram, "i_col");
glVertexAttribPointer(colAttrib, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (void*)(4*sizeof(float)));
glEnableVertexAttribArray(colAttrib);
err = glGetError(); IM_ASSERT(err == GL_NO_ERROR);
}
@ -278,9 +226,10 @@ void InitImGui()
glfwGetWindowSize(window, &w, &h);
ImGuiIO& io = ImGui::GetIO();
io.DisplaySize = ImVec2((float)w, (float)h);
io.DeltaTime = 1.0f/60.0f;
io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB;
io.DisplaySize = ImVec2((float)w, (float)h); // Display size, in pixels. For clamping windows positions.
io.DeltaTime = 1.0f/60.0f; // Time elapsed since last frame, in seconds (in this sample app we'll override this every frame because our timestep is variable)
io.PixelCenterOffset = 0.5f; // Align OpenGL texels
io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_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] = GLFW_KEY_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = GLFW_KEY_RIGHT;
io.KeyMap[ImGuiKey_UpArrow] = GLFW_KEY_UP;
@ -297,12 +246,68 @@ void InitImGui()
io.KeyMap[ImGuiKey_X] = GLFW_KEY_X;
io.KeyMap[ImGuiKey_Y] = GLFW_KEY_Y;
io.KeyMap[ImGuiKey_Z] = GLFW_KEY_Z;
io.PixelCenterOffset = 0.5f;
io.RenderDrawListsFn = ImImpl_RenderDrawLists;
io.SetClipboardTextFn = ImImpl_SetClipboardTextFn;
io.GetClipboardTextFn = ImImpl_GetClipboardTextFn;
// Setup graphics backend
GLint status = GL_TRUE;
GLenum err = GL_NO_ERROR;
err = glGetError(); IM_ASSERT(err == GL_NO_ERROR);
// Create and compile the vertex shader
vertexShader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertexShader, 1, &vertexSource, NULL);
glCompileShader(vertexShader);
glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &status);
if (status != GL_TRUE)
{
char buffer[512];
glGetShaderInfoLog(vertexShader, 1024, NULL, buffer);
printf("%s", buffer);
IM_ASSERT(status == GL_TRUE);
}
// Create and compile the fragment shader
fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fragmentShader, 1, &fragmentSource, NULL);
glCompileShader(fragmentShader);
glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &status);
IM_ASSERT(status == GL_TRUE);
// Link the vertex and fragment shader into a shader program
shaderProgram = glCreateProgram();
glAttachShader(shaderProgram, vertexShader);
glAttachShader(shaderProgram, fragmentShader);
glBindFragDataLocation(shaderProgram, 0, "o_col");
glLinkProgram(shaderProgram);
glGetProgramiv(shaderProgram, GL_LINK_STATUS, &status);
IM_ASSERT(status == GL_TRUE);
uniMVP = glGetUniformLocation(shaderProgram, "MVP");
uniClipRect = glGetUniformLocation(shaderProgram, "ClipRect");
// Create Vertex Buffer Objects & Vertex Array Objects
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
GLint posAttrib = glGetAttribLocation(shaderProgram, "i_pos");
glVertexAttribPointer(posAttrib, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), 0);
glEnableVertexAttribArray(posAttrib);
GLint uvAttrib = glGetAttribLocation(shaderProgram, "i_uv");
glEnableVertexAttribArray(uvAttrib);
glVertexAttribPointer(uvAttrib, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (void*)(2*sizeof(float)));
GLint colAttrib = glGetAttribLocation(shaderProgram, "i_col");
glVertexAttribPointer(colAttrib, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (void*)(4*sizeof(float)));
glEnableVertexAttribArray(colAttrib);
err = glGetError(); IM_ASSERT(err == GL_NO_ERROR);
// Load font texture
glGenTextures(1, &fontTex);
glBindTexture(GL_TEXTURE_2D, fontTex);
@ -348,10 +353,10 @@ int main(int argc, char** argv)
time = current_time;
double mouse_x, mouse_y;
glfwGetCursorPos(window, &mouse_x, &mouse_y);
io.MousePos = ImVec2((float)mouse_x, (float)mouse_y);
io.MousePos = ImVec2((float)mouse_x, (float)mouse_y); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
io.MouseDown[0] = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) != 0;
io.MouseDown[1] = glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) != 0;
io.MouseWheel = (mouse_wheel != 0) ? mouse_wheel > 0.0f ? 1 : - 1 : 0;
io.MouseWheel = (mouse_wheel != 0) ? mouse_wheel > 0.0f ? 1 : - 1 : 0; // Mouse wheel: -1,0,+1
mouse_wheel = 0.0f;
ImGui::NewFrame();

2
imgui.h
View File

@ -381,7 +381,7 @@ struct ImGuiIO
void (*SetClipboardTextFn)(const char* text, const char* text_end); // Required for clipboard support (nb- the string is *NOT* zero-terminated at 'text_end')
// Input - Fill before calling NewFrame()
ImVec2 MousePos; // Mouse position (set to -1,-1 if no mouse / on another screen, etc.)
ImVec2 MousePos; // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
bool MouseDown[2]; // Mouse buttons
int MouseWheel; // Mouse wheel: -1,0,+1
bool KeyCtrl; // Keyboard modifier pressed: Control