mirror of
https://github.com/Drezil/imgui.git
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Merge branch 'zach2good-SDL_OpenGL3_Implementation'
This commit is contained in:
commit
f96de74e05
1
examples/.gitignore
vendored
1
examples/.gitignore
vendored
@ -28,6 +28,7 @@ opengl3_example/opengl3_example
|
||||
*.o
|
||||
*.obj
|
||||
*.exe
|
||||
*.pdb
|
||||
|
||||
## Ini files
|
||||
imgui.ini
|
||||
|
@ -9,8 +9,7 @@ g++ -I ../imgui main.cpp imgui_impl_a5.cpp ../imgui/imgui*.cpp -lallegro -lalleg
|
||||
|
||||
- On Windows with Visual Studio's CLI
|
||||
|
||||
\<a5path\> is your allegro5 folder.
|
||||
|
||||
```
|
||||
cl /MD /I <a5path\include> /I ..\imgui main.cpp imgui_impl_a5.cpp ..\imgui\imgui*.cpp /link /LIBPATH:<a5path\lib> allegro-5.0.10-monolith-md.lib user32.lib
|
||||
set ALLEGRODIR=path_to_your_allegro5_folder
|
||||
cl /Zi /MD /I %ALLEGRODIR%\include /I ..\.. main.cpp imgui_impl_a5.cpp ..\..\imgui*.cpp /link /LIBPATH:%ALLEGRODIR%\lib allegro-5.0.10-monolith-md.lib user32.lib
|
||||
```
|
||||
|
@ -1,3 +1,3 @@
|
||||
@REM Build for Visual Studio compiler. Run your copy of vcvars32.bat or vcvarsall.bat to setup command-line compiler.
|
||||
mkdir Debug
|
||||
cl /nologo /Zi /MD /I ..\.. -I ..\libs\glfw\include -I ..\libs\gl3w *.cpp ..\..\*.cpp ..\libs\gl3w\GL\gl3w.c /FeDebug/opengl_example3.exe /FoDebug/ /link /LIBPATH:..\libs\glfw\lib-vc2010-32 glfw3.lib opengl32.lib gdi32.lib shell32.lib
|
||||
cl /nologo /Zi /MD /I ..\.. /I ..\libs\glfw\include /I ..\libs\gl3w *.cpp ..\..\imgui*.cpp ..\libs\gl3w\GL\gl3w.c /FeDebug/opengl_example3.exe /FoDebug/ /link /LIBPATH:..\libs\glfw\lib-vc2010-32 glfw3.lib opengl32.lib gdi32.lib shell32.lib
|
||||
|
@ -1,3 +1,3 @@
|
||||
@REM Build for Visual Studio compiler. Run your copy of vcvars32.bat or vcvarsall.bat to setup command-line compiler.
|
||||
mkdir Debug
|
||||
cl /nologo /Zi /MD /I ..\.. -I ..\libs\glfw\include *.cpp ..\..\*.cpp /FeDebug/opengl_example.exe /FoDebug/ /link /LIBPATH:..\libs\glfw\lib-vc2010-32 glfw3.lib opengl32.lib gdi32.lib shell32.lib
|
||||
cl /nologo /Zi /MD /I ..\.. /I ..\libs\glfw\include *.cpp ..\..\*.cpp /FeDebug/opengl_example.exe /FoDebug/ /link /LIBPATH:..\libs\glfw\lib-vc2010-32 glfw3.lib opengl32.lib gdi32.lib shell32.lib
|
||||
|
22
examples/sdl_opengl3_example/README.md
Normal file
22
examples/sdl_opengl3_example/README.md
Normal file
@ -0,0 +1,22 @@
|
||||
|
||||
# How to Build
|
||||
|
||||
- On Windows with Visual Studio's CLI
|
||||
|
||||
```
|
||||
set SDL2DIR=path_to_your_sdl2_folder
|
||||
cl /Zi /MD /I ..\.. /I ..\libs\gl3w /I %SDL2DIR%\include main.cpp imgui_impl_sdl_gl3.cpp ..\..\imgui*.cpp ..\libs\gl3w\GL\gl3w.c /link /libpath:%SDL2DIR%\lib\x86 SDL2.lib SDL2main.lib opengl32.lib /subsystem:console
|
||||
```
|
||||
|
||||
- On Linux and similar Unixes
|
||||
|
||||
```
|
||||
c++ `sdl2-config --cflags` -I ../.. -I ../libs/gl3w main.cpp imgui_impl_sdl_gl3.cpp ../../imgui*.cpp ../libs/gl3w/GL/gl3w.c `sdl2-config --libs` -lGL -o sdl2example
|
||||
```
|
||||
|
||||
- On Mac OS X
|
||||
|
||||
```
|
||||
brew install sdl2
|
||||
c++ `sdl2-config --cflags` -I ../.. -I ../libs/gl3w main.cpp imgui_impl_sdl_gl3.cpp ../../imgui*.cpp ../libs/gl3w/GL/gl3w.c `sdl2-config --libs` -framework OpenGl -o sdl2example
|
||||
```
|
380
examples/sdl_opengl3_example/imgui_impl_sdl_gl3.cpp
Normal file
380
examples/sdl_opengl3_example/imgui_impl_sdl_gl3.cpp
Normal file
@ -0,0 +1,380 @@
|
||||
// ImGui SDL2 binding with OpenGL3
|
||||
// You can copy and use unmodified imgui_impl_* files in your project.
|
||||
// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
|
||||
// See main.cpp for an example of using this.
|
||||
// https://github.com/ocornut/imgui
|
||||
|
||||
#include "imgui.h"
|
||||
#include "imgui_impl_sdl_gl3.h"
|
||||
|
||||
// SDL,GL3W
|
||||
#include <SDL.h>
|
||||
#include <SDL_syswm.h>
|
||||
#include <GL/gl3w.h>
|
||||
|
||||
// Data
|
||||
static SDL_Window* g_Window = NULL;
|
||||
static double g_Time = 0.0f;
|
||||
static bool g_MousePressed[3] = { false, false, false };
|
||||
static float g_MouseWheel = 0.0f;
|
||||
static GLuint g_FontTexture = 0;
|
||||
static int g_ShaderHandle = 0, g_VertHandle = 0, g_FragHandle = 0;
|
||||
static int g_AttribLocationTex = 0, g_AttribLocationProjMtx = 0;
|
||||
static int g_AttribLocationPosition = 0, g_AttribLocationUV = 0, g_AttribLocationColor = 0;
|
||||
static unsigned int g_VboHandle = 0, g_VaoHandle = 0, g_ElementsHandle = 0;
|
||||
|
||||
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
|
||||
// If text or lines are blurry when integrating ImGui in your engine:
|
||||
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
|
||||
void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data)
|
||||
{
|
||||
// Backup GL state
|
||||
GLint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, &last_program);
|
||||
GLint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
|
||||
GLint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
|
||||
GLint last_element_array_buffer; glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING, &last_element_array_buffer);
|
||||
GLint last_vertex_array; glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
|
||||
GLint last_blend_src; glGetIntegerv(GL_BLEND_SRC, &last_blend_src);
|
||||
GLint last_blend_dst; glGetIntegerv(GL_BLEND_DST, &last_blend_dst);
|
||||
GLint last_blend_equation_rgb; glGetIntegerv(GL_BLEND_EQUATION_RGB, &last_blend_equation_rgb);
|
||||
GLint last_blend_equation_alpha; glGetIntegerv(GL_BLEND_EQUATION_ALPHA, &last_blend_equation_alpha);
|
||||
GLint last_viewport[4]; glGetIntegerv(GL_VIEWPORT, last_viewport);
|
||||
GLboolean last_enable_blend = glIsEnabled(GL_BLEND);
|
||||
GLboolean last_enable_cull_face = glIsEnabled(GL_CULL_FACE);
|
||||
GLboolean last_enable_depth_test = glIsEnabled(GL_DEPTH_TEST);
|
||||
GLboolean last_enable_scissor_test = glIsEnabled(GL_SCISSOR_TEST);
|
||||
|
||||
// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled
|
||||
glEnable(GL_BLEND);
|
||||
glBlendEquation(GL_FUNC_ADD);
|
||||
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
||||
glDisable(GL_CULL_FACE);
|
||||
glDisable(GL_DEPTH_TEST);
|
||||
glEnable(GL_SCISSOR_TEST);
|
||||
glActiveTexture(GL_TEXTURE0);
|
||||
|
||||
// Handle cases of screen coordinates != from framebuffer coordinates (e.g. retina displays)
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
float fb_height = io.DisplaySize.y * io.DisplayFramebufferScale.y;
|
||||
draw_data->ScaleClipRects(io.DisplayFramebufferScale);
|
||||
|
||||
// Setup orthographic projection matrix
|
||||
glViewport(0, 0, (GLsizei)io.DisplaySize.x, (GLsizei)io.DisplaySize.y);
|
||||
const float ortho_projection[4][4] =
|
||||
{
|
||||
{ 2.0f/io.DisplaySize.x, 0.0f, 0.0f, 0.0f },
|
||||
{ 0.0f, 2.0f/-io.DisplaySize.y, 0.0f, 0.0f },
|
||||
{ 0.0f, 0.0f, -1.0f, 0.0f },
|
||||
{-1.0f, 1.0f, 0.0f, 1.0f },
|
||||
};
|
||||
glUseProgram(g_ShaderHandle);
|
||||
glUniform1i(g_AttribLocationTex, 0);
|
||||
glUniformMatrix4fv(g_AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
|
||||
glBindVertexArray(g_VaoHandle);
|
||||
|
||||
for (int n = 0; n < draw_data->CmdListsCount; n++)
|
||||
{
|
||||
const ImDrawList* cmd_list = draw_data->CmdLists[n];
|
||||
const ImDrawIdx* idx_buffer_offset = 0;
|
||||
|
||||
glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
|
||||
glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)cmd_list->VtxBuffer.size() * sizeof(ImDrawVert), (GLvoid*)&cmd_list->VtxBuffer.front(), GL_STREAM_DRAW);
|
||||
|
||||
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_ElementsHandle);
|
||||
glBufferData(GL_ELEMENT_ARRAY_BUFFER, (GLsizeiptr)cmd_list->IdxBuffer.size() * sizeof(ImDrawIdx), (GLvoid*)&cmd_list->IdxBuffer.front(), GL_STREAM_DRAW);
|
||||
|
||||
for (const ImDrawCmd* pcmd = cmd_list->CmdBuffer.begin(); pcmd != cmd_list->CmdBuffer.end(); pcmd++)
|
||||
{
|
||||
if (pcmd->UserCallback)
|
||||
{
|
||||
pcmd->UserCallback(cmd_list, pcmd);
|
||||
}
|
||||
else
|
||||
{
|
||||
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->TextureId);
|
||||
glScissor((int)pcmd->ClipRect.x, (int)(fb_height - pcmd->ClipRect.w), (int)(pcmd->ClipRect.z - pcmd->ClipRect.x), (int)(pcmd->ClipRect.w - pcmd->ClipRect.y));
|
||||
glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, idx_buffer_offset);
|
||||
}
|
||||
idx_buffer_offset += pcmd->ElemCount;
|
||||
}
|
||||
}
|
||||
|
||||
// Restore modified GL state
|
||||
glUseProgram(last_program);
|
||||
glBindTexture(GL_TEXTURE_2D, last_texture);
|
||||
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
|
||||
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, last_element_array_buffer);
|
||||
glBindVertexArray(last_vertex_array);
|
||||
glBlendEquationSeparate(last_blend_equation_rgb, last_blend_equation_alpha);
|
||||
glBlendFunc(last_blend_src, last_blend_dst);
|
||||
if (last_enable_blend) glEnable(GL_BLEND); else glDisable(GL_BLEND);
|
||||
if (last_enable_cull_face) glEnable(GL_CULL_FACE); else glDisable(GL_CULL_FACE);
|
||||
if (last_enable_depth_test) glEnable(GL_DEPTH_TEST); else glDisable(GL_DEPTH_TEST);
|
||||
if (last_enable_scissor_test) glEnable(GL_SCISSOR_TEST); else glDisable(GL_SCISSOR_TEST);
|
||||
glViewport(last_viewport[0], last_viewport[1], (GLsizei)last_viewport[2], (GLsizei)last_viewport[3]);
|
||||
}
|
||||
|
||||
static const char* ImGui_ImplSdlGL3_GetClipboardText()
|
||||
{
|
||||
return SDL_GetClipboardText();
|
||||
}
|
||||
|
||||
static void ImGui_ImplSdlGL3_SetClipboardText(const char* text)
|
||||
{
|
||||
SDL_SetClipboardText(text);
|
||||
}
|
||||
|
||||
bool ImGui_ImplSdlGL3_ProcessEvent(SDL_Event* event)
|
||||
{
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
switch (event->type)
|
||||
{
|
||||
case SDL_MOUSEWHEEL:
|
||||
{
|
||||
if (event->wheel.y > 0)
|
||||
g_MouseWheel = 1;
|
||||
if (event->wheel.y < 0)
|
||||
g_MouseWheel = -1;
|
||||
return true;
|
||||
}
|
||||
case SDL_MOUSEBUTTONDOWN:
|
||||
{
|
||||
if (event->button.button == SDL_BUTTON_LEFT) g_MousePressed[0] = true;
|
||||
if (event->button.button == SDL_BUTTON_RIGHT) g_MousePressed[1] = true;
|
||||
if (event->button.button == SDL_BUTTON_MIDDLE) g_MousePressed[2] = true;
|
||||
return true;
|
||||
}
|
||||
case SDL_TEXTINPUT:
|
||||
{
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
io.AddInputCharactersUTF8(event->text.text);
|
||||
return true;
|
||||
}
|
||||
case SDL_KEYDOWN:
|
||||
case SDL_KEYUP:
|
||||
{
|
||||
int key = event->key.keysym.sym & ~SDLK_SCANCODE_MASK;
|
||||
io.KeysDown[key] = (event->type == SDL_KEYDOWN);
|
||||
io.KeyShift = ((SDL_GetModState() & KMOD_SHIFT) != 0);
|
||||
io.KeyCtrl = ((SDL_GetModState() & KMOD_CTRL) != 0);
|
||||
io.KeyAlt = ((SDL_GetModState() & KMOD_ALT) != 0);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
void ImGui_ImplSdlGL3_CreateFontsTexture()
|
||||
{
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
|
||||
// Build texture atlas
|
||||
unsigned char* pixels;
|
||||
int width, height;
|
||||
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); // Load as RGBA 32-bits for OpenGL3 demo because it is more likely to be compatible with user's existing shader.
|
||||
|
||||
// Create OpenGL texture
|
||||
glGenTextures(1, &g_FontTexture);
|
||||
glBindTexture(GL_TEXTURE_2D, g_FontTexture);
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
||||
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
||||
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
|
||||
|
||||
// Store our identifier
|
||||
io.Fonts->TexID = (void *)(intptr_t)g_FontTexture;
|
||||
|
||||
// Cleanup (don't clear the input data if you want to append new fonts later)
|
||||
io.Fonts->ClearInputData();
|
||||
io.Fonts->ClearTexData();
|
||||
}
|
||||
|
||||
bool ImGui_ImplSdlGL3_CreateDeviceObjects()
|
||||
{
|
||||
// Backup GL state
|
||||
GLint last_texture, last_array_buffer, last_vertex_array;
|
||||
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
|
||||
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
|
||||
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
|
||||
|
||||
const GLchar *vertex_shader =
|
||||
"#version 330\n"
|
||||
"uniform mat4 ProjMtx;\n"
|
||||
"in vec2 Position;\n"
|
||||
"in vec2 UV;\n"
|
||||
"in vec4 Color;\n"
|
||||
"out vec2 Frag_UV;\n"
|
||||
"out vec4 Frag_Color;\n"
|
||||
"void main()\n"
|
||||
"{\n"
|
||||
" Frag_UV = UV;\n"
|
||||
" Frag_Color = Color;\n"
|
||||
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
|
||||
"}\n";
|
||||
|
||||
const GLchar* fragment_shader =
|
||||
"#version 330\n"
|
||||
"uniform sampler2D Texture;\n"
|
||||
"in vec2 Frag_UV;\n"
|
||||
"in vec4 Frag_Color;\n"
|
||||
"out vec4 Out_Color;\n"
|
||||
"void main()\n"
|
||||
"{\n"
|
||||
" Out_Color = Frag_Color * texture( Texture, Frag_UV.st);\n"
|
||||
"}\n";
|
||||
|
||||
g_ShaderHandle = glCreateProgram();
|
||||
g_VertHandle = glCreateShader(GL_VERTEX_SHADER);
|
||||
g_FragHandle = glCreateShader(GL_FRAGMENT_SHADER);
|
||||
glShaderSource(g_VertHandle, 1, &vertex_shader, 0);
|
||||
glShaderSource(g_FragHandle, 1, &fragment_shader, 0);
|
||||
glCompileShader(g_VertHandle);
|
||||
glCompileShader(g_FragHandle);
|
||||
glAttachShader(g_ShaderHandle, g_VertHandle);
|
||||
glAttachShader(g_ShaderHandle, g_FragHandle);
|
||||
glLinkProgram(g_ShaderHandle);
|
||||
|
||||
g_AttribLocationTex = glGetUniformLocation(g_ShaderHandle, "Texture");
|
||||
g_AttribLocationProjMtx = glGetUniformLocation(g_ShaderHandle, "ProjMtx");
|
||||
g_AttribLocationPosition = glGetAttribLocation(g_ShaderHandle, "Position");
|
||||
g_AttribLocationUV = glGetAttribLocation(g_ShaderHandle, "UV");
|
||||
g_AttribLocationColor = glGetAttribLocation(g_ShaderHandle, "Color");
|
||||
|
||||
glGenBuffers(1, &g_VboHandle);
|
||||
glGenBuffers(1, &g_ElementsHandle);
|
||||
|
||||
glGenVertexArrays(1, &g_VaoHandle);
|
||||
glBindVertexArray(g_VaoHandle);
|
||||
glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
|
||||
glEnableVertexAttribArray(g_AttribLocationPosition);
|
||||
glEnableVertexAttribArray(g_AttribLocationUV);
|
||||
glEnableVertexAttribArray(g_AttribLocationColor);
|
||||
|
||||
#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
|
||||
glVertexAttribPointer(g_AttribLocationPosition, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, pos));
|
||||
glVertexAttribPointer(g_AttribLocationUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, uv));
|
||||
glVertexAttribPointer(g_AttribLocationColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, col));
|
||||
#undef OFFSETOF
|
||||
|
||||
ImGui_ImplSdlGL3_CreateFontsTexture();
|
||||
|
||||
// Restore modified GL state
|
||||
glBindTexture(GL_TEXTURE_2D, last_texture);
|
||||
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
|
||||
glBindVertexArray(last_vertex_array);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void ImGui_ImplSdlGL3_InvalidateDeviceObjects()
|
||||
{
|
||||
if (g_VaoHandle) glDeleteVertexArrays(1, &g_VaoHandle);
|
||||
if (g_VboHandle) glDeleteBuffers(1, &g_VboHandle);
|
||||
if (g_ElementsHandle) glDeleteBuffers(1, &g_ElementsHandle);
|
||||
g_VaoHandle = g_VboHandle = g_ElementsHandle = 0;
|
||||
|
||||
glDetachShader(g_ShaderHandle, g_VertHandle);
|
||||
glDeleteShader(g_VertHandle);
|
||||
g_VertHandle = 0;
|
||||
|
||||
glDetachShader(g_ShaderHandle, g_FragHandle);
|
||||
glDeleteShader(g_FragHandle);
|
||||
g_FragHandle = 0;
|
||||
|
||||
glDeleteProgram(g_ShaderHandle);
|
||||
g_ShaderHandle = 0;
|
||||
|
||||
if (g_FontTexture)
|
||||
{
|
||||
glDeleteTextures(1, &g_FontTexture);
|
||||
ImGui::GetIO().Fonts->TexID = 0;
|
||||
g_FontTexture = 0;
|
||||
}
|
||||
}
|
||||
|
||||
bool ImGui_ImplSdlGL3_Init(SDL_Window *window)
|
||||
{
|
||||
g_Window = window;
|
||||
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
io.KeyMap[ImGuiKey_Tab] = SDLK_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array.
|
||||
io.KeyMap[ImGuiKey_LeftArrow] = SDL_SCANCODE_LEFT;
|
||||
io.KeyMap[ImGuiKey_RightArrow] = SDL_SCANCODE_RIGHT;
|
||||
io.KeyMap[ImGuiKey_UpArrow] = SDL_SCANCODE_UP;
|
||||
io.KeyMap[ImGuiKey_DownArrow] = SDL_SCANCODE_DOWN;
|
||||
io.KeyMap[ImGuiKey_PageUp] = SDL_SCANCODE_PAGEUP;
|
||||
io.KeyMap[ImGuiKey_PageDown] = SDL_SCANCODE_PAGEDOWN;
|
||||
io.KeyMap[ImGuiKey_Home] = SDL_SCANCODE_HOME;
|
||||
io.KeyMap[ImGuiKey_End] = SDL_SCANCODE_END;
|
||||
io.KeyMap[ImGuiKey_Delete] = SDLK_DELETE;
|
||||
io.KeyMap[ImGuiKey_Backspace] = SDLK_BACKSPACE;
|
||||
io.KeyMap[ImGuiKey_Enter] = SDLK_RETURN;
|
||||
io.KeyMap[ImGuiKey_Escape] = SDLK_ESCAPE;
|
||||
io.KeyMap[ImGuiKey_A] = SDLK_a;
|
||||
io.KeyMap[ImGuiKey_C] = SDLK_c;
|
||||
io.KeyMap[ImGuiKey_V] = SDLK_v;
|
||||
io.KeyMap[ImGuiKey_X] = SDLK_x;
|
||||
io.KeyMap[ImGuiKey_Y] = SDLK_y;
|
||||
io.KeyMap[ImGuiKey_Z] = SDLK_z;
|
||||
|
||||
io.RenderDrawListsFn = ImGui_ImplSdlGL3_RenderDrawLists; // Alternatively you can set this to NULL and call ImGui::GetDrawData() after ImGui::Render() to get the same ImDrawData pointer.
|
||||
io.SetClipboardTextFn = ImGui_ImplSdlGL3_SetClipboardText;
|
||||
io.GetClipboardTextFn = ImGui_ImplSdlGL3_GetClipboardText;
|
||||
|
||||
#ifdef _WIN32
|
||||
SDL_SysWMinfo wmInfo;
|
||||
SDL_VERSION(&wmInfo.version);
|
||||
SDL_GetWindowWMInfo(window, &wmInfo);
|
||||
io.ImeWindowHandle = wmInfo.info.win.window;
|
||||
#endif
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void ImGui_ImplSdlGL3_Shutdown()
|
||||
{
|
||||
ImGui_ImplSdlGL3_InvalidateDeviceObjects();
|
||||
ImGui::Shutdown();
|
||||
}
|
||||
|
||||
void ImGui_ImplSdlGL3_NewFrame()
|
||||
{
|
||||
if (!g_FontTexture)
|
||||
ImGui_ImplSdlGL3_CreateDeviceObjects();
|
||||
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
|
||||
// Setup display size (every frame to accommodate for window resizing)
|
||||
int w, h;
|
||||
SDL_GetWindowSize(g_Window, &w, &h);
|
||||
io.DisplaySize = ImVec2((float)w, (float)h);
|
||||
io.DisplayFramebufferScale = ImVec2(1.0f, 1.0f);
|
||||
|
||||
// Setup time step
|
||||
Uint32 time = SDL_GetTicks();
|
||||
double current_time = time / 1000.0;
|
||||
io.DeltaTime = g_Time > 0.0 ? (float)(current_time - g_Time) : (float)(1.0f / 60.0f);
|
||||
g_Time = current_time;
|
||||
|
||||
// Setup inputs
|
||||
// (we already got mouse wheel, keyboard keys & characters from glfw callbacks polled in glfwPollEvents())
|
||||
int mx, my;
|
||||
Uint32 mouseMask = SDL_GetMouseState(&mx, &my);
|
||||
if (SDL_GetWindowFlags(g_Window) & SDL_WINDOW_MOUSE_FOCUS)
|
||||
io.MousePos = ImVec2((float)mx, (float)my); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
|
||||
else
|
||||
io.MousePos = ImVec2(-1, -1);
|
||||
|
||||
io.MouseDown[0] = g_MousePressed[0] || (mouseMask & SDL_BUTTON(SDL_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] = g_MousePressed[1] || (mouseMask & SDL_BUTTON(SDL_BUTTON_RIGHT)) != 0;
|
||||
io.MouseDown[2] = g_MousePressed[2] || (mouseMask & SDL_BUTTON(SDL_BUTTON_MIDDLE)) != 0;
|
||||
g_MousePressed[0] = g_MousePressed[1] = g_MousePressed[2] = false;
|
||||
|
||||
io.MouseWheel = g_MouseWheel;
|
||||
g_MouseWheel = 0.0f;
|
||||
|
||||
// Hide OS mouse cursor if ImGui is drawing it
|
||||
SDL_ShowCursor(io.MouseDrawCursor ? 0 : 1);
|
||||
|
||||
// Start the frame
|
||||
ImGui::NewFrame();
|
||||
}
|
17
examples/sdl_opengl3_example/imgui_impl_sdl_gl3.h
Normal file
17
examples/sdl_opengl3_example/imgui_impl_sdl_gl3.h
Normal file
@ -0,0 +1,17 @@
|
||||
// ImGui SDL2 binding with OpenGL3
|
||||
// You can copy and use unmodified imgui_impl_* files in your project.
|
||||
// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
|
||||
// See main.cpp for an example of using this.
|
||||
// https://github.com/ocornut/imgui
|
||||
|
||||
struct SDL_Window;
|
||||
typedef union SDL_Event SDL_Event;
|
||||
|
||||
IMGUI_API bool ImGui_ImplSdlGL3_Init(SDL_Window *window);
|
||||
IMGUI_API void ImGui_ImplSdlGL3_Shutdown();
|
||||
IMGUI_API void ImGui_ImplSdlGL3_NewFrame();
|
||||
IMGUI_API bool ImGui_ImplSdlGL3_ProcessEvent(SDL_Event* event);
|
||||
|
||||
// Use if you want to reset your rendering device without losing ImGui state.
|
||||
IMGUI_API void ImGui_ImplSdlGL3_InvalidateDeviceObjects();
|
||||
IMGUI_API bool ImGui_ImplSdlGL3_CreateDeviceObjects();
|
109
examples/sdl_opengl3_example/main.cpp
Normal file
109
examples/sdl_opengl3_example/main.cpp
Normal file
@ -0,0 +1,109 @@
|
||||
// ImGui - standalone example application for SDL2 + OpenGL
|
||||
|
||||
#include <imgui.h>
|
||||
#include "imgui_impl_sdl_gl3.h"
|
||||
#include <stdio.h>
|
||||
#include <GL/gl3w.h>
|
||||
#include <SDL.h>
|
||||
|
||||
int main(int, char**)
|
||||
{
|
||||
// Setup SDL
|
||||
if (SDL_Init(SDL_INIT_EVERYTHING) != 0)
|
||||
{
|
||||
printf("Error: %s\n", SDL_GetError());
|
||||
return -1;
|
||||
}
|
||||
|
||||
// Setup window
|
||||
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
|
||||
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
|
||||
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
|
||||
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
|
||||
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
|
||||
SDL_DisplayMode current;
|
||||
SDL_GetCurrentDisplayMode(0, ¤t);
|
||||
SDL_Window *window = SDL_CreateWindow("ImGui SDL2+OpenGL3 example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, SDL_WINDOW_OPENGL|SDL_WINDOW_RESIZABLE);
|
||||
SDL_GLContext glcontext = SDL_GL_CreateContext(window);
|
||||
gl3wInit();
|
||||
|
||||
// Setup ImGui binding
|
||||
ImGui_ImplSdlGL3_Init(window);
|
||||
|
||||
// Load Fonts
|
||||
// (see extra_fonts/README.txt for more details)
|
||||
//ImGuiIO& io = ImGui::GetIO();
|
||||
//io.Fonts->AddFontDefault();
|
||||
//io.Fonts->AddFontFromFileTTF("../../extra_fonts/Cousine-Regular.ttf", 15.0f);
|
||||
//io.Fonts->AddFontFromFileTTF("../../extra_fonts/DroidSans.ttf", 16.0f);
|
||||
//io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyClean.ttf", 13.0f);
|
||||
//io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyTiny.ttf", 10.0f);
|
||||
//io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
|
||||
|
||||
// Merge glyphs from multiple fonts into one (e.g. combine default font with another with Chinese glyphs, or add icons)
|
||||
//ImWchar icons_ranges[] = { 0xf000, 0xf3ff, 0 };
|
||||
//ImFontConfig icons_config; icons_config.MergeMode = true; icons_config.PixelSnapH = true;
|
||||
//io.Fonts->AddFontFromFileTTF("../../extra_fonts/DroidSans.ttf", 18.0f);
|
||||
//io.Fonts->AddFontFromFileTTF("../../extra_fonts/fontawesome-webfont.ttf", 18.0f, &icons_config, icons_ranges);
|
||||
|
||||
bool show_test_window = true;
|
||||
bool show_another_window = false;
|
||||
ImVec4 clear_color = ImColor(114, 144, 154);
|
||||
|
||||
// Main loop
|
||||
bool done = false;
|
||||
while (!done)
|
||||
{
|
||||
SDL_Event event;
|
||||
while (SDL_PollEvent(&event))
|
||||
{
|
||||
ImGui_ImplSdlGL3_ProcessEvent(&event);
|
||||
if (event.type == SDL_QUIT)
|
||||
done = true;
|
||||
}
|
||||
ImGui_ImplSdlGL3_NewFrame();
|
||||
|
||||
// 1. Show a simple window
|
||||
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
|
||||
{
|
||||
static float f = 0.0f;
|
||||
ImGui::Text("Hello, world!");
|
||||
ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
|
||||
ImGui::ColorEdit3("clear color", (float*)&clear_color);
|
||||
if (ImGui::Button("Test Window")) show_test_window ^= 1;
|
||||
if (ImGui::Button("Another Window")) show_another_window ^= 1;
|
||||
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
|
||||
}
|
||||
|
||||
// 2. Show another simple window, this time using an explicit Begin/End pair
|
||||
if (show_another_window)
|
||||
{
|
||||
ImGui::SetNextWindowSize(ImVec2(200,100), ImGuiSetCond_FirstUseEver);
|
||||
ImGui::Begin("Another Window", &show_another_window);
|
||||
ImGui::Text("Hello");
|
||||
ImGui::End();
|
||||
}
|
||||
|
||||
// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
|
||||
if (show_test_window)
|
||||
{
|
||||
ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCond_FirstUseEver);
|
||||
ImGui::ShowTestWindow(&show_test_window);
|
||||
}
|
||||
|
||||
// Rendering
|
||||
glViewport(0, 0, (int)ImGui::GetIO().DisplaySize.x, (int)ImGui::GetIO().DisplaySize.y);
|
||||
glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
ImGui::Render();
|
||||
SDL_GL_SwapWindow(window);
|
||||
}
|
||||
|
||||
// Cleanup
|
||||
ImGui_ImplSdlGL3_Shutdown();
|
||||
SDL_GL_DeleteContext(glcontext);
|
||||
SDL_DestroyWindow(window);
|
||||
SDL_Quit();
|
||||
|
||||
return 0;
|
||||
}
|
@ -3,10 +3,9 @@
|
||||
|
||||
- On Windows with Visual Studio's CLI
|
||||
|
||||
\<sdl2path\> is your SDL2 folder.
|
||||
|
||||
```
|
||||
cl /MD /I <sdl2path\include> /I ..\.. main.cpp imgui_impl_sdl.cpp ..\..\imgui*.cpp /link /LIBPATH:<sdl2path\lib> SDL2.lib SDL2main.lib
|
||||
set SDL2DIR=path_to_your_sdl2_folder
|
||||
cl /Zi /MD /I %SDL2DIR%\include> /I ..\.. main.cpp imgui_impl_sdl.cpp ..\..\imgui*.cpp /link /LIBPATH:%SDL2DIR%\lib SDL2.lib SDL2main.lib
|
||||
```
|
||||
|
||||
- On Linux and similar Unixes
|
||||
|
Loading…
Reference in New Issue
Block a user