mirror of
https://github.com/ocornut/imgui.git
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Merge branch 'SampleSDL2' of https://github.com/CedricGuillemet/imgui into CedricGuillemet-SampleSDL2
This commit is contained in:
commit
046dbf502c
286
examples/opengl_sdl_example/imgui_impl_sdl.cpp
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286
examples/opengl_sdl_example/imgui_impl_sdl.cpp
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#ifdef _MSC_VER
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||||||
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#include <Windows.h>
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#include <gl/GL.h>
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||||||
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#include <gl/GLU.h>
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||||||
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#endif
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||||||
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#ifdef MACOSX
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||||||
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#include <OpenGL/gl.h>
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||||||
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#endif
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||||||
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||||||
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#include <SDL.h>
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||||||
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#include <SDL_syswm.h>
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#include <imgui.h>
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||||||
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#include "imgui_impl_sdl.h"
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||||||
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// Data
|
||||||
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static double g_Time = 0.0f;
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||||||
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static bool g_MousePressed[3] = { false, false, false };
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||||||
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static float g_MouseWheel = 0.0f;
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||||||
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static GLuint g_FontTexture = 0;
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||||||
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||||||
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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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||||||
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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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||||||
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static void ImGui_ImplSdl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
|
||||||
|
{
|
||||||
|
if (cmd_lists_count == 0)
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||||||
|
return;
|
||||||
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||||||
|
// We are using the OpenGL fixed pipeline to make the example code simpler to read!
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||||||
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// A probable faster way to render would be to collate all vertices from all cmd_lists into a single vertex buffer.
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||||||
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// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers.
|
||||||
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glPushAttrib(GL_ENABLE_BIT | GL_COLOR_BUFFER_BIT | GL_TRANSFORM_BIT);
|
||||||
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glEnable(GL_BLEND);
|
||||||
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
||||||
|
glDisable(GL_CULL_FACE);
|
||||||
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glDisable(GL_DEPTH_TEST);
|
||||||
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glEnable(GL_SCISSOR_TEST);
|
||||||
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glEnableClientState(GL_VERTEX_ARRAY);
|
||||||
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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||||||
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glEnableClientState(GL_COLOR_ARRAY);
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glEnable(GL_TEXTURE_2D);
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//glUseProgram(0); // You may want this if using this code in an OpenGL 3+ context
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||||||
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// Setup orthographic projection matrix
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||||||
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const float width = ImGui::GetIO().DisplaySize.x;
|
||||||
|
const float height = ImGui::GetIO().DisplaySize.y;
|
||||||
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glMatrixMode(GL_PROJECTION);
|
||||||
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glPushMatrix();
|
||||||
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glLoadIdentity();
|
||||||
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glOrtho(0.0f, width, height, 0.0f, -1.0f, +1.0f);
|
||||||
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glMatrixMode(GL_MODELVIEW);
|
||||||
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glPushMatrix();
|
||||||
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glLoadIdentity();
|
||||||
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|
||||||
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// Render command lists
|
||||||
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#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
|
||||||
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for (int n = 0; n < cmd_lists_count; n++)
|
||||||
|
{
|
||||||
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const ImDrawList* cmd_list = cmd_lists[n];
|
||||||
|
const unsigned char* vtx_buffer = (const unsigned char*)&cmd_list->vtx_buffer.front();
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||||||
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glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, pos)));
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||||||
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glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, uv)));
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||||||
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glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (void*)(vtx_buffer + OFFSETOF(ImDrawVert, col)));
|
||||||
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||||||
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int vtx_offset = 0;
|
||||||
|
for (size_t cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++)
|
||||||
|
{
|
||||||
|
const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i];
|
||||||
|
if (pcmd->user_callback)
|
||||||
|
{
|
||||||
|
pcmd->user_callback(cmd_list, pcmd);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->texture_id);
|
||||||
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glScissor((int)pcmd->clip_rect.x, (int)(height - pcmd->clip_rect.w), (int)(pcmd->clip_rect.z - pcmd->clip_rect.x), (int)(pcmd->clip_rect.w - pcmd->clip_rect.y));
|
||||||
|
glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
|
||||||
|
}
|
||||||
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vtx_offset += pcmd->vtx_count;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
#undef OFFSETOF
|
||||||
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|
||||||
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// Restore modified state
|
||||||
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glDisableClientState(GL_COLOR_ARRAY);
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||||||
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glDisableClientState(GL_TEXTURE_COORD_ARRAY);
|
||||||
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glDisableClientState(GL_VERTEX_ARRAY);
|
||||||
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glBindTexture(GL_TEXTURE_2D, 0);
|
||||||
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glMatrixMode(GL_MODELVIEW);
|
||||||
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glPopMatrix();
|
||||||
|
glMatrixMode(GL_PROJECTION);
|
||||||
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glPopMatrix();
|
||||||
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glPopAttrib();
|
||||||
|
}
|
||||||
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|
||||||
|
static const char* ImGui_ImplSdl_GetClipboardText()
|
||||||
|
{
|
||||||
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return SDL_GetClipboardText();
|
||||||
|
}
|
||||||
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|
||||||
|
static void ImGui_ImplSdl_SetClipboardText(const char* text)
|
||||||
|
{
|
||||||
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SDL_SetClipboardText(text);
|
||||||
|
}
|
||||||
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|
||||||
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void ImGui_ImplSdl_KeyCallback(int key, bool down)
|
||||||
|
{
|
||||||
|
ImGuiIO& io = ImGui::GetIO();
|
||||||
|
if (down)
|
||||||
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io.KeysDown[key] = true;
|
||||||
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else
|
||||||
|
io.KeysDown[key] = false;
|
||||||
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|
||||||
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io.KeyShift = ((SDL_GetModState() & KMOD_SHIFT) != 0);
|
||||||
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io.KeyCtrl = ((SDL_GetModState() & KMOD_CTRL) != 0);
|
||||||
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io.KeyAlt = ((SDL_GetModState() & KMOD_ALT) != 0);
|
||||||
|
}
|
||||||
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|
||||||
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void ImGui_ImplSdl_CharCallback(unsigned int c)
|
||||||
|
{
|
||||||
|
ImGuiIO& io = ImGui::GetIO();
|
||||||
|
if (c > 0 && c < 0x10000)
|
||||||
|
io.AddInputCharacter((unsigned short)c);
|
||||||
|
}
|
||||||
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|
||||||
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bool ImGui_ImplSdl_CreateDeviceObjects()
|
||||||
|
{
|
||||||
|
ImGuiIO& io = ImGui::GetIO();
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||||||
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|
||||||
|
// Build texture
|
||||||
|
unsigned char* pixels;
|
||||||
|
int width, height;
|
||||||
|
io.Fonts->GetTexDataAsAlpha8(&pixels, &width, &height);
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||||||
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||||||
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// Create texture
|
||||||
|
glGenTextures(1, &g_FontTexture);
|
||||||
|
glBindTexture(GL_TEXTURE_2D, g_FontTexture);
|
||||||
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
||||||
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
||||||
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glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, pixels);
|
||||||
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|
||||||
|
// Store our identifier
|
||||||
|
io.Fonts->TexID = (void *)(intptr_t)g_FontTexture;
|
||||||
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|
||||||
|
io.Fonts->ClearInputData();
|
||||||
|
io.Fonts->ClearTexData();
|
||||||
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|
||||||
|
return true;
|
||||||
|
}
|
||||||
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|
||||||
|
void ImGui_ImplSdl_InvalidateDeviceObjects()
|
||||||
|
{
|
||||||
|
if (g_FontTexture)
|
||||||
|
{
|
||||||
|
glDeleteTextures(1, &g_FontTexture);
|
||||||
|
ImGui::GetIO().Fonts->TexID = 0;
|
||||||
|
g_FontTexture = 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
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|
||||||
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bool ImGui_ImplSdl_Init(SDL_Window *window)
|
||||||
|
{
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|
ImGuiIO& io = ImGui::GetIO();
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||||||
|
io.KeyMap[ImGuiKey_Tab] = SDLK_TAB; // Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array.
|
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io.KeyMap[ImGuiKey_LeftArrow] = SDL_SCANCODE_LEFT;
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io.KeyMap[ImGuiKey_RightArrow] = SDL_SCANCODE_RIGHT;
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io.KeyMap[ImGuiKey_UpArrow] = SDL_SCANCODE_UP;
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||||||
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io.KeyMap[ImGuiKey_DownArrow] = SDL_SCANCODE_DOWN;
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||||||
|
io.KeyMap[ImGuiKey_Home] = SDL_SCANCODE_HOME;
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||||||
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io.KeyMap[ImGuiKey_End] = SDL_SCANCODE_END;
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||||||
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io.KeyMap[ImGuiKey_Delete] = SDLK_DELETE;
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||||||
|
io.KeyMap[ImGuiKey_Backspace] = SDLK_BACKSPACE;
|
||||||
|
io.KeyMap[ImGuiKey_Enter] = SDLK_RETURN;
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||||||
|
io.KeyMap[ImGuiKey_Escape] = SDLK_ESCAPE;
|
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io.KeyMap[ImGuiKey_A] = SDLK_a;
|
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io.KeyMap[ImGuiKey_C] = SDLK_c;
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||||||
|
io.KeyMap[ImGuiKey_V] = SDLK_v;
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||||||
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io.KeyMap[ImGuiKey_X] = SDLK_x;
|
||||||
|
io.KeyMap[ImGuiKey_Y] = SDLK_y;
|
||||||
|
io.KeyMap[ImGuiKey_Z] = SDLK_z;
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||||||
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||||||
|
io.RenderDrawListsFn = ImGui_ImplSdl_RenderDrawLists;
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||||||
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io.SetClipboardTextFn = ImGui_ImplSdl_SetClipboardText;
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||||||
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io.GetClipboardTextFn = ImGui_ImplSdl_GetClipboardText;
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||||||
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||||||
|
#ifdef _MSC_VER
|
||||||
|
SDL_SysWMinfo wmInfo;
|
||||||
|
SDL_VERSION(&wmInfo.version);
|
||||||
|
SDL_GetWindowWMInfo(window, &wmInfo);
|
||||||
|
io.ImeWindowHandle = wmInfo.info.win.window;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
void ImGui_ImplSdl_Shutdown()
|
||||||
|
{
|
||||||
|
ImGui_ImplSdl_InvalidateDeviceObjects();
|
||||||
|
ImGui::Shutdown();
|
||||||
|
}
|
||||||
|
|
||||||
|
bool ImGui_ImplSdl_NewFrame(SDL_Window *window)
|
||||||
|
{
|
||||||
|
if (!g_FontTexture)
|
||||||
|
ImGui_ImplSdl_CreateDeviceObjects();
|
||||||
|
|
||||||
|
ImGuiIO& io = ImGui::GetIO();
|
||||||
|
|
||||||
|
bool done(false);
|
||||||
|
SDL_Event event;
|
||||||
|
while (SDL_PollEvent(&event))
|
||||||
|
{
|
||||||
|
switch (event.type)
|
||||||
|
{
|
||||||
|
case SDL_QUIT:
|
||||||
|
done = true;
|
||||||
|
break;
|
||||||
|
case SDL_MOUSEWHEEL:
|
||||||
|
if (event.wheel.y>0 )
|
||||||
|
{
|
||||||
|
g_MouseWheel = 1;
|
||||||
|
}
|
||||||
|
if (event.wheel.y<0 )
|
||||||
|
{
|
||||||
|
g_MouseWheel = -1;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case SDL_TEXTINPUT:
|
||||||
|
ImGui_ImplSdl_CharCallback(event.text.text[0]);
|
||||||
|
break;
|
||||||
|
case SDL_KEYUP:
|
||||||
|
ImGui_ImplSdl_KeyCallback(event.key.keysym.sym&~SDLK_SCANCODE_MASK, false);
|
||||||
|
break;
|
||||||
|
case SDL_KEYDOWN:
|
||||||
|
ImGui_ImplSdl_KeyCallback(event.key.keysym.sym&~SDLK_SCANCODE_MASK, true);
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Setup display size (every frame to accommodate for window resizing)
|
||||||
|
int w, h;
|
||||||
|
SDL_GetWindowSize(window, &w, &h);
|
||||||
|
io.DisplaySize = ImVec2((float)w, (float)h);
|
||||||
|
|
||||||
|
// Time
|
||||||
|
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;
|
||||||
|
|
||||||
|
int mx, my;
|
||||||
|
Uint32 mouseMask = SDL_GetMouseState(&mx, &my);
|
||||||
|
|
||||||
|
// Setup inputs
|
||||||
|
// (we already got mouse wheel, keyboard keys & characters from glfw callbacks polled in glfwPollEvents())
|
||||||
|
Uint32 windowFlags = SDL_GetWindowFlags(window);
|
||||||
|
if (windowFlags&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);
|
||||||
|
}
|
||||||
|
|
||||||
|
for (int i = 0; i < 3; i++)
|
||||||
|
{
|
||||||
|
io.MouseDown[i] = g_MousePressed[i] || (mouseMask&(1<<i)) != 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.
|
||||||
|
g_MousePressed[i] = false;
|
||||||
|
}
|
||||||
|
|
||||||
|
io.MouseWheel = g_MouseWheel;
|
||||||
|
g_MouseWheel = 0.0f;
|
||||||
|
|
||||||
|
// Hide/show hardware mouse cursor
|
||||||
|
SDL_ShowCursor( io.MouseDrawCursor ? 0 : 1);
|
||||||
|
|
||||||
|
// Start the frame
|
||||||
|
ImGui::NewFrame();
|
||||||
|
return done;
|
||||||
|
}
|
12
examples/opengl_sdl_example/imgui_impl_sdl.h
Normal file
12
examples/opengl_sdl_example/imgui_impl_sdl.h
Normal file
@ -0,0 +1,12 @@
|
|||||||
|
|
||||||
|
struct SDL_Window;
|
||||||
|
|
||||||
|
bool ImGui_ImplSdl_Init(SDL_Window *window);
|
||||||
|
void ImGui_ImplSdl_Shutdown();
|
||||||
|
bool ImGui_ImplSdl_NewFrame(SDL_Window *window);
|
||||||
|
|
||||||
|
void ImGui_ImplSdl_InvalidateDeviceObjects();
|
||||||
|
bool ImGui_ImplSdl_CreateDeviceObjects();
|
||||||
|
|
||||||
|
void ImGui_ImplSdl_KeyCallback(int key, int, bool down);
|
||||||
|
void ImGui_ImplSdl_CharCallback(unsigned int c);
|
109
examples/opengl_sdl_example/main.cpp
Normal file
109
examples/opengl_sdl_example/main.cpp
Normal file
@ -0,0 +1,109 @@
|
|||||||
|
// ImGui - standalone example application for Glfw + OpenGL 2, using fixed pipeline
|
||||||
|
|
||||||
|
#include <imgui.h>
|
||||||
|
#include "imgui_impl_sdl.h"
|
||||||
|
#include <stdio.h>
|
||||||
|
|
||||||
|
#ifdef WIN32
|
||||||
|
#include <Windows.h>
|
||||||
|
#include <gl/GL.h>
|
||||||
|
#include <gl/GLU.h>
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifdef MACOSX
|
||||||
|
#include <OpenGL/gl.h>
|
||||||
|
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#include <SDL.h>
|
||||||
|
|
||||||
|
int SDL_main(int /*argc*/, char* /*argv*/[])
|
||||||
|
{
|
||||||
|
// Setup SDL
|
||||||
|
if (SDL_Init(SDL_INIT_EVERYTHING) != 0)
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
// Init OpenGL
|
||||||
|
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);
|
||||||
|
|
||||||
|
int width(1024), height(576);
|
||||||
|
|
||||||
|
// SDL window
|
||||||
|
SDL_DisplayMode current;
|
||||||
|
SDL_GetCurrentDisplayMode(0, ¤t);
|
||||||
|
SDL_Window *window = SDL_CreateWindow( "ImGui OpenGL2/SDL2 example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, width, height, SDL_WINDOW_OPENGL|SDL_WINDOW_RESIZABLE );
|
||||||
|
|
||||||
|
// Create an OpenGL context associated with the window.
|
||||||
|
SDL_GLContext glcontext = SDL_GL_CreateContext(window);
|
||||||
|
|
||||||
|
// Setup ImGui binding
|
||||||
|
ImGui_ImplSdl_Init(window);
|
||||||
|
//ImGuiIO& io = ImGui::GetIO();
|
||||||
|
//ImFont* my_font0 = io.Fonts->AddFontDefault();
|
||||||
|
//ImFont* my_font1 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/DroidSans.ttf", 16.0f);
|
||||||
|
//ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/Karla-Regular.ttf", 16.0f);
|
||||||
|
//ImFont* my_font3 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyClean.ttf", 13.0f); my_font3->DisplayOffset.y += 1;
|
||||||
|
//ImFont* my_font4 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyTiny.ttf", 10.0f); my_font4->DisplayOffset.y += 1;
|
||||||
|
//ImFont* my_font5 = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, io.Fonts->GetGlyphRangesJapanese());
|
||||||
|
|
||||||
|
bool show_test_window = true;
|
||||||
|
bool show_another_window = false;
|
||||||
|
ImVec4 clear_color = ImColor(114, 144, 154);
|
||||||
|
|
||||||
|
bool done(false);
|
||||||
|
// Main loop
|
||||||
|
while(!done)
|
||||||
|
{
|
||||||
|
done = ImGui_ImplSdl_NewFrame(window);
|
||||||
|
|
||||||
|
// 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_ImplSdl_Shutdown();
|
||||||
|
|
||||||
|
SDL_GL_DeleteContext(glcontext);
|
||||||
|
SDL_DestroyWindow(window);
|
||||||
|
|
||||||
|
SDL_Quit();
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
Loading…
Reference in New Issue
Block a user