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Examples: SDL: Extracted into imgui_impl_sdl.*, reused imgui_impl_opengl* files.
This commit is contained in:
omar
parent
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commit
ef521d1e0b
@ -1,17 +1,10 @@
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// ImGui SDL2 binding with OpenGL (legacy, fixed pipeline)
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// ImGui SDL2 binding with OpenGL3
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// (SDL is a cross-platform general purpose library for handling windows, inputs, OpenGL/Vulkan graphics context creation, etc.)
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// (GL3W is a helper library to access OpenGL functions since there is no standard header to access modern OpenGL functions easily. Alternatives are GLEW, Glad, etc.)
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// Implemented features:
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// [X] User texture binding. Cast 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
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// **DO NOT USE THIS CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL (SHADERS, VBO, VAO, etc.)**
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// **Prefer using the code in the sdl_opengl3_example/ folder**
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// This code is mostly provided as a reference to learn how ImGui integration works, because it is shorter to read.
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// If your code is using GL3+ context or any semi modern OpenGL calls, using this is likely to make everything more
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// complicated, will require your code to reset every single OpenGL attributes to their initial state, and might
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// confuse your GPU driver.
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// The GL2 code is unable to reset attributes or even call e.g. "glUseProgram(0)" because they don't exist in that API.
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// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
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// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
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// If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
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@ -20,7 +13,7 @@
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// CHANGELOG
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// (minor and older changes stripped away, please see git history for details)
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// 2018-02-16: Inputs: Added support for mouse cursors, honoring ImGui::GetMouseCursor() value.
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// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplSdlGL2_RenderDrawData() in the .h file so you can call it yourself.
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// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplSdlGL3_RenderDrawData() in the .h file so you can call it yourself.
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// 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
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// 2018-02-06: Inputs: Added mapping for ImGuiKey_Space.
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// 2018-02-05: Misc: Using SDL_GetPerformanceCounter() instead of SDL_GetTicks() to be able to handle very high framerate (1000+ FPS).
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@ -28,114 +21,33 @@
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// 2018-01-20: Inputs: Added Horizontal Mouse Wheel support.
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// 2018-01-19: Inputs: When available (SDL 2.0.4+) using SDL_CaptureMouse() to retrieve coordinates outside of client area when dragging. Otherwise (SDL 2.0.3 and before) testing for SDL_WINDOW_INPUT_FOCUS instead of SDL_WINDOW_MOUSE_FOCUS.
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// 2018-01-18: Inputs: Added mapping for ImGuiKey_Insert.
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// 2017-09-01: OpenGL: Save and restore current polygon mode.
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// 2018-01-07: OpenGL: Changed GLSL shader version from 330 to 150.
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// 2017-09-01: OpenGL: Save and restore current bound sampler. Save and restore current polygon mode.
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// 2017-08-25: Inputs: MousePos set to -FLT_MAX,-FLT_MAX when mouse is unavailable/missing (instead of -1,-1).
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// 2017-05-01: OpenGL: Fixed save and restore of current blend func state.
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// 2017-05-01: OpenGL: Fixed save and restore of current GL_ACTIVE_TEXTURE.
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// 2016-10-15: Misc: Added a void* user_data parameter to Clipboard function handlers.
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// 2016-09-05: OpenGL: Fixed save and restore of current scissor rectangle.
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// 2016-07-29: OpenGL: Explicitly setting GL_UNPACK_ROW_LENGTH to reduce issues because SDL changes it. (#752)
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#include "imgui.h"
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#include "imgui_impl_sdl2.h"
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// SDL,GL3W
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#include <SDL.h>
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#include <SDL_syswm.h>
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#include <SDL_opengl.h>
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#include "imgui.h"
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#include "imgui_impl_sdl_gl2.h"
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// Data
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static Uint64 g_Time = 0;
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static bool g_MousePressed[3] = { false, false, false };
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static GLuint g_FontTexture = 0;
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static SDL_Cursor* g_SdlCursors[ImGuiMouseCursor_Count_] = { 0 };
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static SDL_Cursor* g_MouseCursors[ImGuiMouseCursor_Count_] = { 0 };
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// OpenGL2 Render function.
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// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
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// Note that this implementation is little overcomplicated because we are saving/setting up/restoring every OpenGL state explicitly, in order to be able to run within any OpenGL engine that doesn't do so.
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void ImGui_ImplSdlGL2_RenderDrawData(ImDrawData* draw_data)
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{
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// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
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ImGuiIO& io = ImGui::GetIO();
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int fb_width = (int)(io.DisplaySize.x * io.DisplayFramebufferScale.x);
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int fb_height = (int)(io.DisplaySize.y * io.DisplayFramebufferScale.y);
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if (fb_width == 0 || fb_height == 0)
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return;
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draw_data->ScaleClipRects(io.DisplayFramebufferScale);
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// We are using the OpenGL fixed pipeline to make the example code simpler to read!
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// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers, polygon fill.
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GLint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
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GLint last_polygon_mode[2]; glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode);
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GLint last_viewport[4]; glGetIntegerv(GL_VIEWPORT, last_viewport);
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GLint last_scissor_box[4]; glGetIntegerv(GL_SCISSOR_BOX, last_scissor_box);
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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);
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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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glEnableClientState(GL_COLOR_ARRAY);
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glEnable(GL_TEXTURE_2D);
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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//glUseProgram(0); // You may want this if using this code in an OpenGL 3+ context where shaders may be bound
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// Setup viewport, orthographic projection matrix
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glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height);
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glMatrixMode(GL_PROJECTION);
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glPushMatrix();
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glLoadIdentity();
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glOrtho(0.0f, io.DisplaySize.x, io.DisplaySize.y, 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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// Render command lists
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for (int n = 0; n < draw_data->CmdListsCount; n++)
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{
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const ImDrawList* cmd_list = draw_data->CmdLists[n];
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const ImDrawVert* vtx_buffer = cmd_list->VtxBuffer.Data;
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const ImDrawIdx* idx_buffer = cmd_list->IdxBuffer.Data;
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glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (const GLvoid*)((const char*)vtx_buffer + IM_OFFSETOF(ImDrawVert, pos)));
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glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (const GLvoid*)((const char*)vtx_buffer + IM_OFFSETOF(ImDrawVert, uv)));
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glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (const GLvoid*)((const char*)vtx_buffer + IM_OFFSETOF(ImDrawVert, col)));
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for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
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{
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const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
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if (pcmd->UserCallback)
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{
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pcmd->UserCallback(cmd_list, pcmd);
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}
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else
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{
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glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->TextureId);
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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));
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glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, idx_buffer);
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}
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idx_buffer += pcmd->ElemCount;
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}
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}
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// Restore modified state
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glDisableClientState(GL_COLOR_ARRAY);
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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, (GLuint)last_texture);
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glMatrixMode(GL_MODELVIEW);
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glPopMatrix();
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glMatrixMode(GL_PROJECTION);
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glPopMatrix();
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glPopAttrib();
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glPolygonMode(GL_FRONT, last_polygon_mode[0]); glPolygonMode(GL_BACK, last_polygon_mode[1]);
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glViewport(last_viewport[0], last_viewport[1], (GLsizei)last_viewport[2], (GLsizei)last_viewport[3]);
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glScissor(last_scissor_box[0], last_scissor_box[1], (GLsizei)last_scissor_box[2], (GLsizei)last_scissor_box[3]);
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}
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static const char* ImGui_ImplSdlGL2_GetClipboardText(void*)
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static const char* ImGui_ImplSDL2_GetClipboardText(void*)
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{
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return SDL_GetClipboardText();
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}
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static void ImGui_ImplSdlGL2_SetClipboardText(void*, const char* text)
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static void ImGui_ImplSDL2_SetClipboardText(void*, const char* text)
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{
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SDL_SetClipboardText(text);
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}
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@ -144,7 +56,7 @@ static void ImGui_ImplSdlGL2_SetClipboardText(void*, const char* text)
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// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application.
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// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
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// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
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bool ImGui_ImplSdlGL2_ProcessEvent(SDL_Event* event)
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bool ImGui_ImplSDL2_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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@ -185,44 +97,7 @@ bool ImGui_ImplSdlGL2_ProcessEvent(SDL_Event* event)
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return false;
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}
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bool ImGui_ImplSdlGL2_CreateDeviceObjects()
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{
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// Build texture atlas
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ImGuiIO& io = ImGui::GetIO();
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unsigned char* pixels;
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int width, height;
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io.Fonts->GetTexDataAsAlpha8(&pixels, &width, &height);
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// Upload texture to graphics system
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GLint last_texture;
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glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
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glGenTextures(1, &g_FontTexture);
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glBindTexture(GL_TEXTURE_2D, g_FontTexture);
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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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glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
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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
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io.Fonts->TexID = (void *)(intptr_t)g_FontTexture;
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// Restore state
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glBindTexture(GL_TEXTURE_2D, last_texture);
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return true;
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}
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void ImGui_ImplSdlGL2_InvalidateDeviceObjects()
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{
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if (g_FontTexture)
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{
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glDeleteTextures(1, &g_FontTexture);
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ImGui::GetIO().Fonts->TexID = 0;
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g_FontTexture = 0;
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}
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}
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bool ImGui_ImplSdlGL2_Init(SDL_Window* window)
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bool ImGui_ImplSDL2_Init(SDL_Window* window)
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{
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// Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array.
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ImGuiIO& io = ImGui::GetIO();
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@ -248,17 +123,17 @@ bool ImGui_ImplSdlGL2_Init(SDL_Window* window)
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io.KeyMap[ImGuiKey_Y] = SDL_SCANCODE_Y;
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io.KeyMap[ImGuiKey_Z] = SDL_SCANCODE_Z;
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io.SetClipboardTextFn = ImGui_ImplSdlGL2_SetClipboardText;
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io.GetClipboardTextFn = ImGui_ImplSdlGL2_GetClipboardText;
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io.SetClipboardTextFn = ImGui_ImplSDL2_SetClipboardText;
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io.GetClipboardTextFn = ImGui_ImplSDL2_GetClipboardText;
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io.ClipboardUserData = NULL;
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g_SdlCursors[ImGuiMouseCursor_Arrow] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_ARROW);
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g_SdlCursors[ImGuiMouseCursor_TextInput] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_IBEAM);
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g_SdlCursors[ImGuiMouseCursor_ResizeAll] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEALL);
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g_SdlCursors[ImGuiMouseCursor_ResizeNS] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENS);
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g_SdlCursors[ImGuiMouseCursor_ResizeEW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEWE);
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g_SdlCursors[ImGuiMouseCursor_ResizeNESW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENESW);
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g_SdlCursors[ImGuiMouseCursor_ResizeNWSE] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENWSE);
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g_MouseCursors[ImGuiMouseCursor_Arrow] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_ARROW);
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g_MouseCursors[ImGuiMouseCursor_TextInput] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_IBEAM);
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g_MouseCursors[ImGuiMouseCursor_ResizeAll] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEALL);
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g_MouseCursors[ImGuiMouseCursor_ResizeNS] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENS);
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g_MouseCursors[ImGuiMouseCursor_ResizeEW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEWE);
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g_MouseCursors[ImGuiMouseCursor_ResizeNESW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENESW);
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g_MouseCursors[ImGuiMouseCursor_ResizeNWSE] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENWSE);
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#ifdef _WIN32
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SDL_SysWMinfo wmInfo;
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@ -272,20 +147,16 @@ bool ImGui_ImplSdlGL2_Init(SDL_Window* window)
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return true;
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}
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void ImGui_ImplSdlGL2_Shutdown()
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void ImGui_ImplSDL2_Shutdown()
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{
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ImGui_ImplSdlGL2_InvalidateDeviceObjects();
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for (ImGuiMouseCursor cursor_n = 0; cursor_n < ImGuiMouseCursor_Count_; cursor_n++)
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SDL_FreeCursor(g_SdlCursors[cursor_n]);
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SDL_FreeCursor(g_MouseCursors[cursor_n]);
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}
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void ImGui_ImplSdlGL2_NewFrame(SDL_Window *window)
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void ImGui_ImplSDL2_NewFrame(SDL_Window* window)
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{
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if (!g_FontTexture)
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ImGui_ImplSdlGL2_CreateDeviceObjects();
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ImGuiIO& io = ImGui::GetIO();
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IM_ASSERT(io.Fonts->IsBuilt()); // Font atlas needs to be built, call renderer _NewFrame() function e.g. ImGui_ImplOpenGL3_NewFrame()
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// Setup display size (every frame to accommodate for window resizing)
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int w, h;
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@ -334,7 +205,7 @@ void ImGui_ImplSdlGL2_NewFrame(SDL_Window *window)
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}
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else
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{
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SDL_SetCursor(g_SdlCursors[cursor]);
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SDL_SetCursor(g_MouseCursors[cursor]);
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SDL_ShowCursor(1);
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}
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@ -13,12 +13,7 @@
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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 void ImGui_ImplSdlGL3_RenderDrawData(ImDrawData* draw_data);
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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_API bool ImGui_ImplSDL2_Init(SDL_Window* window);
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IMGUI_API void ImGui_ImplSDL2_Shutdown();
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IMGUI_API void ImGui_ImplSDL2_NewFrame(SDL_Window* window);
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IMGUI_API bool ImGui_ImplSDL2_ProcessEvent(SDL_Event* event);
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@ -1,27 +0,0 @@
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// ImGui SDL2 binding with OpenGL (legacy, fixed pipeline)
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// (SDL is a cross-platform general purpose library for handling windows, inputs, OpenGL/Vulkan graphics context creation, etc.)
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// Implemented features:
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// [X] User texture binding. Cast 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
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// **DO NOT USE THIS CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL (SHADERS, VBO, VAO, etc.)**
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// **Prefer using the code in the sdl_opengl3_example/ folder**
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// See imgui_impl_sdl.cpp for details.
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// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
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// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
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// If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
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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_ImplSdlGL2_Init(SDL_Window* window);
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IMGUI_API void ImGui_ImplSdlGL2_Shutdown();
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IMGUI_API void ImGui_ImplSdlGL2_NewFrame(SDL_Window* window);
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IMGUI_API void ImGui_ImplSdlGL2_RenderDrawData(ImDrawData* draw_data);
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IMGUI_API bool ImGui_ImplSdlGL2_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_ImplSdlGL2_InvalidateDeviceObjects();
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IMGUI_API bool ImGui_ImplSdlGL2_CreateDeviceObjects();
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@ -7,7 +7,8 @@
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// See imgui_impl_sdl.cpp for details.
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#include "imgui.h"
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#include "imgui_impl_sdl_gl2.h"
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#include "../imgui_impl_sdl2.h"
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#include "../imgui_impl_opengl2.h"
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#include <stdio.h>
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#include <SDL.h>
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#include <SDL_opengl.h>
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@ -36,7 +37,8 @@ int main(int, char**)
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// Setup ImGui binding
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ImGui::CreateContext();
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ImGuiIO& io = ImGui::GetIO(); (void)io;
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ImGui_ImplSdlGL2_Init(window);
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ImGui_ImplSDL2_Init(window);
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ImGui_ImplOpenGL2_Init();
|
||||
//io.NavFlags |= ImGuiNavFlags_EnableKeyboard; // Enable Keyboard Controls
|
||||
|
||||
// Setup style
|
||||
@ -73,11 +75,12 @@ int main(int, char**)
|
||||
SDL_Event event;
|
||||
while (SDL_PollEvent(&event))
|
||||
{
|
||||
ImGui_ImplSdlGL2_ProcessEvent(&event);
|
||||
ImGui_ImplSDL2_ProcessEvent(&event);
|
||||
if (event.type == SDL_QUIT)
|
||||
done = true;
|
||||
}
|
||||
ImGui_ImplSdlGL2_NewFrame(window);
|
||||
ImGui_ImplOpenGL2_NewFrame();
|
||||
ImGui_ImplSDL2_NewFrame(window);
|
||||
|
||||
// 1. Show a simple window.
|
||||
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
|
||||
@ -122,12 +125,13 @@ int main(int, char**)
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
//glUseProgram(0); // You may want this if using this code in an OpenGL 3+ context where shaders may be bound
|
||||
ImGui::Render();
|
||||
ImGui_ImplSdlGL2_RenderDrawData(ImGui::GetDrawData());
|
||||
ImGui_ImplOpenGL2_RenderDrawData(ImGui::GetDrawData());
|
||||
SDL_GL_SwapWindow(window);
|
||||
}
|
||||
|
||||
// Cleanup
|
||||
ImGui_ImplSdlGL2_Shutdown();
|
||||
ImGui_ImplOpenGL2_Shutdown();
|
||||
ImGui_ImplSDL2_Shutdown();
|
||||
ImGui::DestroyContext();
|
||||
|
||||
SDL_GL_DeleteContext(glcontext);
|
||||
|
||||
@ -153,14 +153,16 @@
|
||||
<ClCompile Include="..\..\imgui.cpp" />
|
||||
<ClCompile Include="..\..\imgui_demo.cpp" />
|
||||
<ClCompile Include="..\..\imgui_draw.cpp" />
|
||||
<ClCompile Include="imgui_impl_sdl_gl2.cpp" />
|
||||
<ClCompile Include="..\imgui_impl_opengl2.cpp" />
|
||||
<ClCompile Include="..\imgui_impl_sdl2.cpp" />
|
||||
<ClCompile Include="main.cpp" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<ClInclude Include="..\..\imconfig.h" />
|
||||
<ClInclude Include="..\..\imgui.h" />
|
||||
<ClInclude Include="..\..\imgui_internal.h" />
|
||||
<ClInclude Include="imgui_impl_sdl_gl2.h" />
|
||||
<ClInclude Include="..\imgui_impl_opengl2.h" />
|
||||
<ClInclude Include="..\imgui_impl_sdl2.h" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<None Include="..\..\misc\natvis\imgui.natvis" />
|
||||
|
||||
@ -22,7 +22,10 @@
|
||||
<ClCompile Include="main.cpp">
|
||||
<Filter>sources</Filter>
|
||||
</ClCompile>
|
||||
<ClCompile Include="imgui_impl_sdl_gl2.cpp">
|
||||
<ClCompile Include="..\imgui_impl_sdl2.cpp">
|
||||
<Filter>sources</Filter>
|
||||
</ClCompile>
|
||||
<ClCompile Include="..\imgui_impl_opengl2.cpp">
|
||||
<Filter>sources</Filter>
|
||||
</ClCompile>
|
||||
</ItemGroup>
|
||||
@ -36,7 +39,10 @@
|
||||
<ClInclude Include="..\..\imgui_internal.h">
|
||||
<Filter>imgui</Filter>
|
||||
</ClInclude>
|
||||
<ClInclude Include="imgui_impl_sdl_gl2.h">
|
||||
<ClInclude Include="..\imgui_impl_opengl2.h">
|
||||
<Filter>sources</Filter>
|
||||
</ClInclude>
|
||||
<ClInclude Include="..\imgui_impl_sdl2.h">
|
||||
<Filter>sources</Filter>
|
||||
</ClInclude>
|
||||
</ItemGroup>
|
||||
|
||||
@ -1,457 +0,0 @@
|
||||
// ImGui SDL2 binding with OpenGL3
|
||||
// (SDL is a cross-platform general purpose library for handling windows, inputs, OpenGL/Vulkan graphics context creation, etc.)
|
||||
// (GL3W is a helper library to access OpenGL functions since there is no standard header to access modern OpenGL functions easily. Alternatives are GLEW, Glad, etc.)
|
||||
|
||||
// Implemented features:
|
||||
// [X] User texture binding. Cast 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
|
||||
|
||||
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
|
||||
// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
|
||||
// If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
|
||||
// https://github.com/ocornut/imgui
|
||||
|
||||
// CHANGELOG
|
||||
// (minor and older changes stripped away, please see git history for details)
|
||||
// 2018-02-16: Inputs: Added support for mouse cursors, honoring ImGui::GetMouseCursor() value.
|
||||
// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplSdlGL3_RenderDrawData() in the .h file so you can call it yourself.
|
||||
// 2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
|
||||
// 2018-02-06: Inputs: Added mapping for ImGuiKey_Space.
|
||||
// 2018-02-05: Misc: Using SDL_GetPerformanceCounter() instead of SDL_GetTicks() to be able to handle very high framerate (1000+ FPS).
|
||||
// 2018-02-05: Inputs: Keyboard mapping is using scancodes everywhere instead of a confusing mixture of keycodes and scancodes.
|
||||
// 2018-01-20: Inputs: Added Horizontal Mouse Wheel support.
|
||||
// 2018-01-19: Inputs: When available (SDL 2.0.4+) using SDL_CaptureMouse() to retrieve coordinates outside of client area when dragging. Otherwise (SDL 2.0.3 and before) testing for SDL_WINDOW_INPUT_FOCUS instead of SDL_WINDOW_MOUSE_FOCUS.
|
||||
// 2018-01-18: Inputs: Added mapping for ImGuiKey_Insert.
|
||||
// 2018-01-07: OpenGL: Changed GLSL shader version from 330 to 150.
|
||||
// 2017-09-01: OpenGL: Save and restore current bound sampler. Save and restore current polygon mode.
|
||||
// 2017-08-25: Inputs: MousePos set to -FLT_MAX,-FLT_MAX when mouse is unavailable/missing (instead of -1,-1).
|
||||
// 2017-05-01: OpenGL: Fixed save and restore of current blend func state.
|
||||
// 2017-05-01: OpenGL: Fixed save and restore of current GL_ACTIVE_TEXTURE.
|
||||
// 2016-10-15: Misc: Added a void* user_data parameter to Clipboard function handlers.
|
||||
// 2016-09-05: OpenGL: Fixed save and restore of current scissor rectangle.
|
||||
// 2016-07-29: OpenGL: Explicitly setting GL_UNPACK_ROW_LENGTH to reduce issues because SDL changes it. (#752)
|
||||
|
||||
#include "imgui.h"
|
||||
#include "imgui_impl_sdl_gl3.h"
|
||||
|
||||
// SDL,GL3W
|
||||
#include <SDL.h>
|
||||
#include <SDL_syswm.h>
|
||||
#include <GL/gl3w.h> // This example is using gl3w to access OpenGL functions (because it is small). You may use glew/glad/glLoadGen/etc. whatever already works for you.
|
||||
|
||||
// Data
|
||||
static Uint64 g_Time = 0;
|
||||
static bool g_MousePressed[3] = { false, false, false };
|
||||
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;
|
||||
static SDL_Cursor* g_SdlCursors[ImGuiMouseCursor_Count_] = { 0 };
|
||||
|
||||
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
|
||||
// Note that this implementation is little overcomplicated because we are saving/setting up/restoring every OpenGL state explicitly, in order to be able to run within any OpenGL engine that doesn't do so.
|
||||
// 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_RenderDrawData(ImDrawData* draw_data)
|
||||
{
|
||||
// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
int fb_width = (int)(io.DisplaySize.x * io.DisplayFramebufferScale.x);
|
||||
int fb_height = (int)(io.DisplaySize.y * io.DisplayFramebufferScale.y);
|
||||
if (fb_width == 0 || fb_height == 0)
|
||||
return;
|
||||
draw_data->ScaleClipRects(io.DisplayFramebufferScale);
|
||||
|
||||
// Backup GL state
|
||||
GLenum last_active_texture; glGetIntegerv(GL_ACTIVE_TEXTURE, (GLint*)&last_active_texture);
|
||||
glActiveTexture(GL_TEXTURE0);
|
||||
GLint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, &last_program);
|
||||
GLint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
|
||||
GLint last_sampler; glGetIntegerv(GL_SAMPLER_BINDING, &last_sampler);
|
||||
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_polygon_mode[2]; glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode);
|
||||
GLint last_viewport[4]; glGetIntegerv(GL_VIEWPORT, last_viewport);
|
||||
GLint last_scissor_box[4]; glGetIntegerv(GL_SCISSOR_BOX, last_scissor_box);
|
||||
GLenum last_blend_src_rgb; glGetIntegerv(GL_BLEND_SRC_RGB, (GLint*)&last_blend_src_rgb);
|
||||
GLenum last_blend_dst_rgb; glGetIntegerv(GL_BLEND_DST_RGB, (GLint*)&last_blend_dst_rgb);
|
||||
GLenum last_blend_src_alpha; glGetIntegerv(GL_BLEND_SRC_ALPHA, (GLint*)&last_blend_src_alpha);
|
||||
GLenum last_blend_dst_alpha; glGetIntegerv(GL_BLEND_DST_ALPHA, (GLint*)&last_blend_dst_alpha);
|
||||
GLenum last_blend_equation_rgb; glGetIntegerv(GL_BLEND_EQUATION_RGB, (GLint*)&last_blend_equation_rgb);
|
||||
GLenum last_blend_equation_alpha; glGetIntegerv(GL_BLEND_EQUATION_ALPHA, (GLint*)&last_blend_equation_alpha);
|
||||
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, polygon fill
|
||||
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);
|
||||
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
|
||||
|
||||
// Setup viewport, orthographic projection matrix
|
||||
glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height);
|
||||
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);
|
||||
glBindSampler(0, 0); // Rely on combined texture/sampler state.
|
||||
|
||||
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), (const GLvoid*)cmd_list->VtxBuffer.Data, GL_STREAM_DRAW);
|
||||
|
||||
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_ElementsHandle);
|
||||
glBufferData(GL_ELEMENT_ARRAY_BUFFER, (GLsizeiptr)cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx), (const GLvoid*)cmd_list->IdxBuffer.Data, GL_STREAM_DRAW);
|
||||
|
||||
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
|
||||
{
|
||||
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
|
||||
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);
|
||||
glBindSampler(0, last_sampler);
|
||||
glActiveTexture(last_active_texture);
|
||||
glBindVertexArray(last_vertex_array);
|
||||
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
|
||||
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, last_element_array_buffer);
|
||||
glBlendEquationSeparate(last_blend_equation_rgb, last_blend_equation_alpha);
|
||||
glBlendFuncSeparate(last_blend_src_rgb, last_blend_dst_rgb, last_blend_src_alpha, last_blend_dst_alpha);
|
||||
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);
|
||||
glPolygonMode(GL_FRONT_AND_BACK, last_polygon_mode[0]);
|
||||
glViewport(last_viewport[0], last_viewport[1], (GLsizei)last_viewport[2], (GLsizei)last_viewport[3]);
|
||||
glScissor(last_scissor_box[0], last_scissor_box[1], (GLsizei)last_scissor_box[2], (GLsizei)last_scissor_box[3]);
|
||||
}
|
||||
|
||||
static const char* ImGui_ImplSdlGL3_GetClipboardText(void*)
|
||||
{
|
||||
return SDL_GetClipboardText();
|
||||
}
|
||||
|
||||
static void ImGui_ImplSdlGL3_SetClipboardText(void*, const char* text)
|
||||
{
|
||||
SDL_SetClipboardText(text);
|
||||
}
|
||||
|
||||
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
|
||||
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application.
|
||||
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
|
||||
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
|
||||
bool ImGui_ImplSdlGL3_ProcessEvent(SDL_Event* event)
|
||||
{
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
switch (event->type)
|
||||
{
|
||||
case SDL_MOUSEWHEEL:
|
||||
{
|
||||
if (event->wheel.x > 0) io.MouseWheelH += 1;
|
||||
if (event->wheel.x < 0) io.MouseWheelH -= 1;
|
||||
if (event->wheel.y > 0) io.MouseWheel += 1;
|
||||
if (event->wheel.y < 0) io.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:
|
||||
{
|
||||
io.AddInputCharactersUTF8(event->text.text);
|
||||
return true;
|
||||
}
|
||||
case SDL_KEYDOWN:
|
||||
case SDL_KEYUP:
|
||||
{
|
||||
int key = event->key.keysym.scancode;
|
||||
IM_ASSERT(key >= 0 && key < IM_ARRAYSIZE(io.KeysDown));
|
||||
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);
|
||||
io.KeySuper = ((SDL_GetModState() & KMOD_GUI) != 0);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
void ImGui_ImplSdlGL3_CreateFontsTexture()
|
||||
{
|
||||
// Build texture atlas
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
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.
|
||||
|
||||
// Upload texture to graphics system
|
||||
GLint last_texture;
|
||||
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_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);
|
||||
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
|
||||
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;
|
||||
|
||||
// Restore state
|
||||
glBindTexture(GL_TEXTURE_2D, last_texture);
|
||||
}
|
||||
|
||||
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 150\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 150\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);
|
||||
|
||||
glVertexAttribPointer(g_AttribLocationPosition, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, pos));
|
||||
glVertexAttribPointer(g_AttribLocationUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, uv));
|
||||
glVertexAttribPointer(g_AttribLocationColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, col));
|
||||
|
||||
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;
|
||||
|
||||
if (g_ShaderHandle && g_VertHandle) glDetachShader(g_ShaderHandle, g_VertHandle);
|
||||
if (g_VertHandle) glDeleteShader(g_VertHandle);
|
||||
g_VertHandle = 0;
|
||||
|
||||
if (g_ShaderHandle && g_FragHandle) glDetachShader(g_ShaderHandle, g_FragHandle);
|
||||
if (g_FragHandle) glDeleteShader(g_FragHandle);
|
||||
g_FragHandle = 0;
|
||||
|
||||
if (g_ShaderHandle) 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)
|
||||
{
|
||||
// Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array.
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
io.KeyMap[ImGuiKey_Tab] = SDL_SCANCODE_TAB;
|
||||
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_Insert] = SDL_SCANCODE_INSERT;
|
||||
io.KeyMap[ImGuiKey_Delete] = SDL_SCANCODE_DELETE;
|
||||
io.KeyMap[ImGuiKey_Backspace] = SDL_SCANCODE_BACKSPACE;
|
||||
io.KeyMap[ImGuiKey_Space] = SDL_SCANCODE_SPACE;
|
||||
io.KeyMap[ImGuiKey_Enter] = SDL_SCANCODE_RETURN;
|
||||
io.KeyMap[ImGuiKey_Escape] = SDL_SCANCODE_ESCAPE;
|
||||
io.KeyMap[ImGuiKey_A] = SDL_SCANCODE_A;
|
||||
io.KeyMap[ImGuiKey_C] = SDL_SCANCODE_C;
|
||||
io.KeyMap[ImGuiKey_V] = SDL_SCANCODE_V;
|
||||
io.KeyMap[ImGuiKey_X] = SDL_SCANCODE_X;
|
||||
io.KeyMap[ImGuiKey_Y] = SDL_SCANCODE_Y;
|
||||
io.KeyMap[ImGuiKey_Z] = SDL_SCANCODE_Z;
|
||||
|
||||
io.SetClipboardTextFn = ImGui_ImplSdlGL3_SetClipboardText;
|
||||
io.GetClipboardTextFn = ImGui_ImplSdlGL3_GetClipboardText;
|
||||
io.ClipboardUserData = NULL;
|
||||
|
||||
g_SdlCursors[ImGuiMouseCursor_Arrow] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_ARROW);
|
||||
g_SdlCursors[ImGuiMouseCursor_TextInput] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_IBEAM);
|
||||
g_SdlCursors[ImGuiMouseCursor_ResizeAll] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEALL);
|
||||
g_SdlCursors[ImGuiMouseCursor_ResizeNS] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENS);
|
||||
g_SdlCursors[ImGuiMouseCursor_ResizeEW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEWE);
|
||||
g_SdlCursors[ImGuiMouseCursor_ResizeNESW] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENESW);
|
||||
g_SdlCursors[ImGuiMouseCursor_ResizeNWSE] = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENWSE);
|
||||
|
||||
#ifdef _WIN32
|
||||
SDL_SysWMinfo wmInfo;
|
||||
SDL_VERSION(&wmInfo.version);
|
||||
SDL_GetWindowWMInfo(window, &wmInfo);
|
||||
io.ImeWindowHandle = wmInfo.info.win.window;
|
||||
#else
|
||||
(void)window;
|
||||
#endif
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void ImGui_ImplSdlGL3_Shutdown()
|
||||
{
|
||||
ImGui_ImplSdlGL3_InvalidateDeviceObjects();
|
||||
|
||||
for (ImGuiMouseCursor cursor_n = 0; cursor_n < ImGuiMouseCursor_Count_; cursor_n++)
|
||||
SDL_FreeCursor(g_SdlCursors[cursor_n]);
|
||||
}
|
||||
|
||||
void ImGui_ImplSdlGL3_NewFrame(SDL_Window* window)
|
||||
{
|
||||
if (!g_FontTexture)
|
||||
ImGui_ImplSdlGL3_CreateDeviceObjects();
|
||||
|
||||
ImGuiIO& io = ImGui::GetIO();
|
||||
|
||||
// Setup display size (every frame to accommodate for window resizing)
|
||||
int w, h;
|
||||
int display_w, display_h;
|
||||
SDL_GetWindowSize(window, &w, &h);
|
||||
SDL_GL_GetDrawableSize(window, &display_w, &display_h);
|
||||
io.DisplaySize = ImVec2((float)w, (float)h);
|
||||
io.DisplayFramebufferScale = ImVec2(w > 0 ? ((float)display_w / w) : 0, h > 0 ? ((float)display_h / h) : 0);
|
||||
|
||||
// Setup time step (we don't use SDL_GetTicks() because it is using millisecond resolution)
|
||||
static Uint64 frequency = SDL_GetPerformanceFrequency();
|
||||
Uint64 current_time = SDL_GetPerformanceCounter();
|
||||
io.DeltaTime = g_Time > 0 ? (float)((double)(current_time - g_Time) / frequency) : (float)(1.0f / 60.0f);
|
||||
g_Time = current_time;
|
||||
|
||||
// Setup mouse inputs (we already got mouse wheel, keyboard keys & characters from our event handler)
|
||||
int mx, my;
|
||||
Uint32 mouse_buttons = SDL_GetMouseState(&mx, &my);
|
||||
io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
|
||||
io.MouseDown[0] = g_MousePressed[0] || (mouse_buttons & 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] || (mouse_buttons & SDL_BUTTON(SDL_BUTTON_RIGHT)) != 0;
|
||||
io.MouseDown[2] = g_MousePressed[2] || (mouse_buttons & SDL_BUTTON(SDL_BUTTON_MIDDLE)) != 0;
|
||||
g_MousePressed[0] = g_MousePressed[1] = g_MousePressed[2] = false;
|
||||
|
||||
// We need to use SDL_CaptureMouse() to easily retrieve mouse coordinates outside of the client area. This is only supported from SDL 2.0.4 (released Jan 2016)
|
||||
#if (SDL_MAJOR_VERSION >= 2) && (SDL_MINOR_VERSION >= 0) && (SDL_PATCHLEVEL >= 4)
|
||||
if ((SDL_GetWindowFlags(window) & (SDL_WINDOW_MOUSE_FOCUS | SDL_WINDOW_MOUSE_CAPTURE)) != 0)
|
||||
io.MousePos = ImVec2((float)mx, (float)my);
|
||||
bool any_mouse_button_down = false;
|
||||
for (int n = 0; n < IM_ARRAYSIZE(io.MouseDown); n++)
|
||||
any_mouse_button_down |= io.MouseDown[n];
|
||||
if (any_mouse_button_down && (SDL_GetWindowFlags(window) & SDL_WINDOW_MOUSE_CAPTURE) == 0)
|
||||
SDL_CaptureMouse(SDL_TRUE);
|
||||
if (!any_mouse_button_down && (SDL_GetWindowFlags(window) & SDL_WINDOW_MOUSE_CAPTURE) != 0)
|
||||
SDL_CaptureMouse(SDL_FALSE);
|
||||
#else
|
||||
if ((SDL_GetWindowFlags(window) & SDL_WINDOW_INPUT_FOCUS) != 0)
|
||||
io.MousePos = ImVec2((float)mx, (float)my);
|
||||
#endif
|
||||
|
||||
// Hide OS mouse cursor if ImGui is drawing it
|
||||
ImGuiMouseCursor cursor = ImGui::GetMouseCursor();
|
||||
if (io.MouseDrawCursor || cursor == ImGuiMouseCursor_None)
|
||||
{
|
||||
SDL_ShowCursor(0);
|
||||
}
|
||||
else
|
||||
{
|
||||
SDL_SetCursor(g_SdlCursors[cursor]);
|
||||
SDL_ShowCursor(1);
|
||||
}
|
||||
|
||||
// Start the frame. This call will update the io.WantCaptureMouse, io.WantCaptureKeyboard flag that you can use to dispatch inputs (or not) to your application.
|
||||
ImGui::NewFrame();
|
||||
}
|
||||
@ -4,7 +4,8 @@
|
||||
// (GL3W is a helper library to access OpenGL functions since there is no standard header to access modern OpenGL functions easily. Alternatives are GLEW, Glad, etc.)
|
||||
|
||||
#include "imgui.h"
|
||||
#include "imgui_impl_sdl_gl3.h"
|
||||
#include "../imgui_impl_sdl2.h"
|
||||
#include "../imgui_impl_opengl3.h"
|
||||
#include <stdio.h>
|
||||
#include <GL/gl3w.h> // This example is using gl3w to access OpenGL functions (because it is small). You may use glew/glad/glLoadGen/etc. whatever already works for you.
|
||||
#include <SDL.h>
|
||||
@ -36,7 +37,8 @@ int main(int, char**)
|
||||
// Setup ImGui binding
|
||||
ImGui::CreateContext();
|
||||
ImGuiIO& io = ImGui::GetIO(); (void)io;
|
||||
ImGui_ImplSdlGL3_Init(window);
|
||||
ImGui_ImplSDL2_Init(window);
|
||||
ImGui_ImplOpenGL3_Init();
|
||||
//io.NavFlags |= ImGuiNavFlags_EnableKeyboard;
|
||||
|
||||
// Setup style
|
||||
@ -73,11 +75,12 @@ int main(int, char**)
|
||||
SDL_Event event;
|
||||
while (SDL_PollEvent(&event))
|
||||
{
|
||||
ImGui_ImplSdlGL3_ProcessEvent(&event);
|
||||
ImGui_ImplSDL2_ProcessEvent(&event);
|
||||
if (event.type == SDL_QUIT)
|
||||
done = true;
|
||||
}
|
||||
ImGui_ImplSdlGL3_NewFrame(window);
|
||||
ImGui_ImplOpenGL3_NewFrame();
|
||||
ImGui_ImplSDL2_NewFrame(window);
|
||||
|
||||
// 1. Show a simple window.
|
||||
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
|
||||
@ -121,12 +124,13 @@ int main(int, char**)
|
||||
glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
ImGui::Render();
|
||||
ImGui_ImplSdlGL3_RenderDrawData(ImGui::GetDrawData());
|
||||
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
|
||||
SDL_GL_SwapWindow(window);
|
||||
}
|
||||
|
||||
// Cleanup
|
||||
ImGui_ImplSdlGL3_Shutdown();
|
||||
ImGui_ImplOpenGL3_Shutdown();
|
||||
ImGui_ImplSDL2_Shutdown();
|
||||
ImGui::DestroyContext();
|
||||
|
||||
SDL_GL_DeleteContext(glcontext);
|
||||
|
||||
@ -153,17 +153,19 @@
|
||||
<ClCompile Include="..\..\imgui.cpp" />
|
||||
<ClCompile Include="..\..\imgui_demo.cpp" />
|
||||
<ClCompile Include="..\..\imgui_draw.cpp" />
|
||||
<ClCompile Include="..\imgui_impl_opengl3.cpp" />
|
||||
<ClCompile Include="..\imgui_impl_sdl2.cpp" />
|
||||
<ClCompile Include="..\libs\gl3w\GL\gl3w.c" />
|
||||
<ClCompile Include="imgui_impl_sdl_gl3.cpp" />
|
||||
<ClCompile Include="main.cpp" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<ClInclude Include="..\..\imconfig.h" />
|
||||
<ClInclude Include="..\..\imgui.h" />
|
||||
<ClInclude Include="..\..\imgui_internal.h" />
|
||||
<ClInclude Include="..\imgui_impl_opengl3.h" />
|
||||
<ClInclude Include="..\imgui_impl_sdl2.h" />
|
||||
<ClInclude Include="..\libs\gl3w\GL\gl3w.h" />
|
||||
<ClInclude Include="..\libs\gl3w\GL\glcorearb.h" />
|
||||
<ClInclude Include="imgui_impl_sdl_gl3.h" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<None Include="..\..\misc\natvis\imgui.natvis" />
|
||||
|
||||
@ -22,15 +22,18 @@
|
||||
<ClCompile Include="..\..\imgui_draw.cpp">
|
||||
<Filter>imgui</Filter>
|
||||
</ClCompile>
|
||||
<ClCompile Include="imgui_impl_sdl_gl3.cpp">
|
||||
<Filter>sources</Filter>
|
||||
</ClCompile>
|
||||
<ClCompile Include="main.cpp">
|
||||
<Filter>sources</Filter>
|
||||
</ClCompile>
|
||||
<ClCompile Include="..\libs\gl3w\GL\gl3w.c">
|
||||
<Filter>gl3w</Filter>
|
||||
</ClCompile>
|
||||
<ClCompile Include="..\imgui_impl_opengl3.cpp">
|
||||
<Filter>sources</Filter>
|
||||
</ClCompile>
|
||||
<ClCompile Include="..\imgui_impl_sdl2.cpp">
|
||||
<Filter>sources</Filter>
|
||||
</ClCompile>
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<ClInclude Include="..\..\imconfig.h">
|
||||
@ -42,15 +45,18 @@
|
||||
<ClInclude Include="..\..\imgui_internal.h">
|
||||
<Filter>imgui</Filter>
|
||||
</ClInclude>
|
||||
<ClInclude Include="imgui_impl_sdl_gl3.h">
|
||||
<Filter>sources</Filter>
|
||||
</ClInclude>
|
||||
<ClInclude Include="..\libs\gl3w\GL\gl3w.h">
|
||||
<Filter>gl3w</Filter>
|
||||
</ClInclude>
|
||||
<ClInclude Include="..\libs\gl3w\GL\glcorearb.h">
|
||||
<Filter>gl3w</Filter>
|
||||
</ClInclude>
|
||||
<ClInclude Include="..\imgui_impl_opengl3.h">
|
||||
<Filter>sources</Filter>
|
||||
</ClInclude>
|
||||
<ClInclude Include="..\imgui_impl_sdl2.h">
|
||||
<Filter>sources</Filter>
|
||||
</ClInclude>
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<None Include="..\README.txt" />
|
||||
|
||||
Loading…
Reference in New Issue
Block a user