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Examples: SDL+OpenGL3: Using glew like existing example + renaming (#356)
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@ -1,8 +1,22 @@
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# How to Build
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Link
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===
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OpenGL
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SDL2
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GLEW
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- On Windows with Visual Studio's CLI
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```
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set SDL2DIR=path_to_your_sdl2_folder
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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
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```
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- On Linux and similar Unixes
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```
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c++ `sdl2-config --cflags` -I ../.. -I ../libs/gl3w main.cpp imgui_impl_sdl.cpp ../../imgui*.cpp ../libs/gl3w/GL/gl3w.c `sdl2-config --libs` -lGL -o sdl2example
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```
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- On Mac OS X
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```
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brew install sdl2
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c++ `sdl2-config --cflags` -I ../.. -I ../libs/gl3w main.cpp imgui_impl_sdl.cpp ../../imgui*.cpp ../libs/gl3w/GL/gl3w.c `sdl2-config --libs` -framework OpenGl -o sdl2example
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```
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@ -3,9 +3,9 @@
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#include <SDL.h>
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#include <SDL_syswm.h>
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#include <GL/glew.h>
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#include <GL/gl3w.h>
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#include "imgui.h"
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#include "imgui_impl_sdlogl3.h"
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#include "imgui_impl_sdl_gl3.h"
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// Data
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static SDL_Window* g_Window = NULL;
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@ -21,7 +21,7 @@ static unsigned int g_VboHandle = 0, g_VaoHandle = 0, g_ElementsHandle = 0;
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// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
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// If text or lines are blurry when integrating ImGui in your engine:
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// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
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void ImGui_ImplSdlOgl3_RenderDrawLists(ImDrawData* draw_data)
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void ImGui_ImplSdlGL3_RenderDrawLists(ImDrawData* draw_data)
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{
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// Backup GL state
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GLint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, &last_program);
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@ -106,17 +106,17 @@ void ImGui_ImplSdlOgl3_RenderDrawLists(ImDrawData* draw_data)
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if (last_enable_scissor_test) glEnable(GL_SCISSOR_TEST); else glDisable(GL_SCISSOR_TEST);
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}
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static const char* ImGui_ImplSdlOgl3_GetClipboardText()
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static const char* ImGui_ImplSdlGL3_GetClipboardText()
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{
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return SDL_GetClipboardText();
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}
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static void ImGui_ImplSdlOgl3_SetClipboardText(const char* text)
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static void ImGui_ImplSdlGL3_SetClipboardText(const char* text)
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{
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SDL_SetClipboardText(text);
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}
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bool ImGui_ImplSdlOgl3_ProcessEvent(SDL_Event* event)
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bool ImGui_ImplSdlGL3_ProcessEvent(SDL_Event* event)
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{
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ImGuiIO& io = ImGui::GetIO();
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switch (event->type)
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@ -156,7 +156,7 @@ bool ImGui_ImplSdlOgl3_ProcessEvent(SDL_Event* event)
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return false;
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}
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void ImGui_ImplSdlOgl3_CreateFontsTexture()
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void ImGui_ImplSdlGL3_CreateFontsTexture()
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{
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ImGuiIO& io = ImGui::GetIO();
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@ -180,7 +180,7 @@ void ImGui_ImplSdlOgl3_CreateFontsTexture()
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io.Fonts->ClearTexData();
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}
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bool ImGui_ImplSdlOgl3_CreateDeviceObjects()
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bool ImGui_ImplSdlGL3_CreateDeviceObjects()
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{
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// Backup GL state
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GLint last_texture, last_array_buffer, last_vertex_array;
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@ -247,7 +247,7 @@ bool ImGui_ImplSdlOgl3_CreateDeviceObjects()
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glVertexAttribPointer(g_AttribLocationColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, col));
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#undef OFFSETOF
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ImGui_ImplSdlOgl3_CreateFontsTexture();
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ImGui_ImplSdlGL3_CreateFontsTexture();
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// Restore modified GL state
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glBindTexture(GL_TEXTURE_2D, last_texture);
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@ -257,7 +257,7 @@ bool ImGui_ImplSdlOgl3_CreateDeviceObjects()
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return true;
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}
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void ImGui_ImplSdlOgl3_InvalidateDeviceObjects()
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void ImGui_ImplSdlGL3_InvalidateDeviceObjects()
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{
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if (g_FontTexture)
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{
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@ -267,7 +267,7 @@ void ImGui_ImplSdlOgl3_InvalidateDeviceObjects()
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}
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}
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bool ImGui_ImplSdlOgl3_Init(SDL_Window *window)
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bool ImGui_ImplSdlGL3_Init(SDL_Window *window)
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{
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g_Window = window;
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@ -292,9 +292,9 @@ bool ImGui_ImplSdlOgl3_Init(SDL_Window *window)
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io.KeyMap[ImGuiKey_Y] = SDLK_y;
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io.KeyMap[ImGuiKey_Z] = SDLK_z;
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io.RenderDrawListsFn = ImGui_ImplSdlOgl3_RenderDrawLists; // Alternatively you can set this to NULL and call ImGui::GetDrawData() after ImGui::Render() to get the same ImDrawData pointer.
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io.SetClipboardTextFn = ImGui_ImplSdlOgl3_SetClipboardText;
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io.GetClipboardTextFn = ImGui_ImplSdlOgl3_GetClipboardText;
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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.
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io.SetClipboardTextFn = ImGui_ImplSdlGL3_SetClipboardText;
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io.GetClipboardTextFn = ImGui_ImplSdlGL3_GetClipboardText;
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#ifdef _WIN32
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SDL_SysWMinfo wmInfo;
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@ -306,7 +306,7 @@ bool ImGui_ImplSdlOgl3_Init(SDL_Window *window)
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return true;
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}
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void ImGui_ImplSdlOgl3_Shutdown()
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void ImGui_ImplSdlGL3_Shutdown()
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{
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if (g_VaoHandle) glDeleteVertexArrays(1, &g_VaoHandle);
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if (g_VboHandle) glDeleteBuffers(1, &g_VboHandle);
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@ -333,10 +333,10 @@ void ImGui_ImplSdlOgl3_Shutdown()
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ImGui::Shutdown();
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}
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void ImGui_ImplSdlOgl3_NewFrame(SDL_Window *window)
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void ImGui_ImplSdlGL3_NewFrame(SDL_Window *window)
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{
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if (!g_FontTexture)
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ImGui_ImplSdlOgl3_CreateDeviceObjects();
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ImGui_ImplSdlGL3_CreateDeviceObjects();
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ImGuiIO& io = ImGui::GetIO();
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14
examples/sdl_opengl3_example/imgui_impl_sdl_gl3.h
Normal file
14
examples/sdl_opengl3_example/imgui_impl_sdl_gl3.h
Normal file
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// ImGui SDL2 binding with OpenGL3
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// https://github.com/ocornut/imgui
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struct SDL_Window;
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typedef union SDL_Event SDL_Event;
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IMGUI_API bool ImGui_ImplSdlGL3_Init(SDL_Window *window);
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IMGUI_API void ImGui_ImplSdlGL3_Shutdown();
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IMGUI_API void ImGui_ImplSdlGL3_NewFrame(SDL_Window *window);
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IMGUI_API bool ImGui_ImplSdlGL3_ProcessEvent(SDL_Event* event);
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// Use if you want to reset your rendering device without losing ImGui state.
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IMGUI_API void ImGui_ImplSdlGL3_InvalidateDeviceObjects();
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IMGUI_API bool ImGui_ImplSdlGL3_CreateDeviceObjects();
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// ImGui SDL2 binding with OpenGL3
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// https://github.com/ocornut/imgui
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struct SDL_Window;
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typedef union SDL_Event SDL_Event;
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IMGUI_API bool ImGui_ImplSdlOgl3_Init(SDL_Window *window);
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IMGUI_API void ImGui_ImplSdlOgl3_Shutdown();
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IMGUI_API void ImGui_ImplSdlOgl3_NewFrame(SDL_Window *window);
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IMGUI_API bool ImGui_ImplSdlOgl3_ProcessEvent(SDL_Event* event);
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// Use if you want to reset your rendering device without losing ImGui state.
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IMGUI_API void ImGui_ImplSdlOgl3_InvalidateDeviceObjects();
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IMGUI_API bool ImGui_ImplSdlOgl3_CreateDeviceObjects();
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// ImGui - standalone example application for SDL2 + OpenGL
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#include <imgui.h>
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#include "imgui_impl_sdlogl3.h"
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#include "imgui_impl_sdl_gl3.h"
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#include <stdio.h>
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#include <GL/gl3w.h>
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#include <SDL.h>
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#include <GL/glew.h>
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int main(int, char**)
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{
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@ -23,11 +23,12 @@ int main(int, char**)
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SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
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SDL_DisplayMode current;
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SDL_GetCurrentDisplayMode(0, ¤t);
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SDL_Window *window = SDL_CreateWindow("ImGui SDL2+OpenGL example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, SDL_WINDOW_OPENGL|SDL_WINDOW_RESIZABLE);
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SDL_Window *window = SDL_CreateWindow("ImGui SDL2+OpenGL3 example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, SDL_WINDOW_OPENGL|SDL_WINDOW_RESIZABLE);
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SDL_GLContext glcontext = SDL_GL_CreateContext(window);
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gl3wInit();
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// Setup ImGui binding
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ImGui_ImplSdlOgl3_Init(window);
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ImGui_ImplSdlGL3_Init(window);
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// Load Fonts
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// (see extra_fonts/README.txt for more details)
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@ -56,11 +57,11 @@ int main(int, char**)
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SDL_Event event;
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while (SDL_PollEvent(&event))
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{
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ImGui_ImplSdlOgl3_ProcessEvent(&event);
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ImGui_ImplSdlGL3_ProcessEvent(&event);
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if (event.type == SDL_QUIT)
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done = true;
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}
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ImGui_ImplSdlOgl3_NewFrame(window);
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ImGui_ImplSdlGL3_NewFrame(window);
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// 1. Show a simple window
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// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
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@ -99,7 +100,7 @@ int main(int, char**)
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}
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// Cleanup
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ImGui_ImplSdlOgl3_Shutdown();
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ImGui_ImplSdlGL3_Shutdown();
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SDL_GL_DeleteContext(glcontext);
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SDL_DestroyWindow(window);
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SDL_Quit();
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