changing to imgui sdl

.gitignore

@@ -10,3 +10,4 @@ output/*
 *.obj
 
 imgui.ini
+.DS_Store

README.md

@@ -31,3 +31,15 @@ Implementations are reusable bits of code using popular odin libraries/bidings,
 
 ## Building cimgui
 If you want to build cimgui yourself instead of using the binaries that exist in the repo, you can just call `make cimgui` from a command prompt that has `cl` and `link` in their path.
+
+If you need to build cimgui:
+```
+In the cimgui makefile change the compiler flags to:
+CXXFLAGS=-O2 -fno-exceptions -fno-rtti -fno-threadsafe-statics
+
+1. make
+2. make static
+
+Rename libcimgui.a to cimgui.a
+Move cimgui.a to odin-imgui external.
+```

examples/font_example_glfw_opengl/Roboto/LICENSE.txt

@@ -0,0 +1,202 @@
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examples/font_example_glfw_opengl/font_example.odin

@@ -0,0 +1,161 @@
+package main
+
+import "core:log"
+import "core:runtime"
+import "core:strings"
+import "core:mem"
+import "core:fmt"
+
+import gl "vendor:OpenGL"
+import "vendor:glfw"
+
+DESIRED_GL_MAJOR_VERSION :: 4
+DESIRED_GL_MINOR_VERSION :: 5
+
+import imgui "../.."
+import imgl "../../impl/opengl"
+import imglfw "../../impl/glfw"
+
+show_demo_window := false
+
+main :: proc() {
+	context.logger = get_logger()
+	defer free(context.logger.data)
+
+	if !bool(glfw.Init()) {
+		desc, err := glfw.GetError()
+		log.error("GLFW init failed:", err, desc)
+		return
+	}
+	defer glfw.Terminate()
+
+	glfw.WindowHint(glfw.CONTEXT_VERSION_MAJOR, DESIRED_GL_MAJOR_VERSION)
+	glfw.WindowHint(glfw.CONTEXT_VERSION_MINOR, DESIRED_GL_MINOR_VERSION)
+	glfw.WindowHint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
+	glfw.WindowHint(glfw.DOUBLEBUFFER, 1)
+	glfw.WindowHint(glfw.DEPTH_BITS, 24)
+	glfw.WindowHint(glfw.STENCIL_BITS, 8)
+	window := glfw.CreateWindow(1280, 720, "odin-imgui GLFW+OpenGL FONTS", nil, nil)
+	if window == nil {
+		desc, err := glfw.GetError()
+		log.error("GLFW window creation failed:", err, desc)
+		return
+	}
+	defer glfw.DestroyWindow(window)
+
+	glfw.SetErrorCallback(error_callback)
+	glfw.SetKeyCallback(window, key_callback)
+
+	glfw.MakeContextCurrent(window)
+	glfw.SwapInterval(1)
+
+	gl.load_up_to(
+		DESIRED_GL_MAJOR_VERSION,
+		DESIRED_GL_MINOR_VERSION,
+		glfw.gl_set_proc_address,
+	)
+	gl.ClearColor(0.25, 0.25, 0.25, 1)
+
+	imgui_state := init_imgui_state(window)
+
+	roboto_regular := imgl.imgui_load_font_from_file("Roboto/Roboto-Regular.ttf", 16, true)
+	roboto_bold := imgl.imgui_load_font_from_file("Roboto/Roboto-Bold.ttf", 48)
+
+	io := imgui.get_io()
+
+	running := true
+	for !glfw.WindowShouldClose(window) {
+
+		imglfw_new_frame_update_inputs()
+		imgui.new_frame()
+		{
+			info_overlay()
+
+			if show_demo_window do imgui.show_demo_window(&show_demo_window)
+
+			{
+				imgui.begin("Misc tests")
+					pos := imgui.get_window_pos()
+					size := imgui.get_window_size()
+					imgui.push_font(roboto_bold)
+					imgui.text("pos: {}", pos)
+					imgui.text("size: {}", size)
+					imgui.pop_font()
+
+					imgui.text("pos: {}", pos)
+					imgui.text("size: {}", size)
+				imgui.end()
+			}
+		}
+		imgui.render()
+
+		gl.Viewport(0, 0, i32(io.display_size.x), i32(io.display_size.y))
+		gl.Scissor(0, 0, i32(io.display_size.x), i32(io.display_size.y))
+		gl.Clear(gl.COLOR_BUFFER_BIT)
+		imgl.imgui_render(imgui.get_draw_data(), imgui_state.opengl_state)
+
+		glfw.SwapBuffers(window)
+		glfw.PollEvents()
+	}
+}
+
+get_logger :: proc() -> log.Logger {
+	logger_opts := log.Options{.Level, .Line, .Procedure}
+	return log.create_console_logger(opt = logger_opts)
+}
+
+key_callback :: proc "c" (window: glfw.WindowHandle, key, scancode, action, mods: i32) {
+	context = runtime.default_context()
+
+	if action == glfw.PRESS {
+		switch key {
+		case glfw.KEY_ESCAPE:
+			glfw.SetWindowShouldClose(window, true)
+		case glfw.KEY_TAB:
+			io := imgui.get_io()
+			if io.want_capture_keyboard == false {
+				show_demo_window = true
+			}
+		}
+	}
+}
+
+error_callback :: proc "c" (error: i32, description: cstring) {
+	context = runtime.default_context()
+	context.logger = get_logger()
+	log.error("GLFW error:", error, description)
+}
+
+info_overlay :: proc() {
+	imgui.set_next_window_pos(imgui.Vec2{10, 10})
+	imgui.set_next_window_bg_alpha(0.2)
+	overlay_flags: imgui.Window_Flags = .NoDecoration | .AlwaysAutoResize | .NoSavedSettings |
+                                     .NoFocusOnAppearing | .NoNav | .NoMove
+	imgui.begin("Info", nil, overlay_flags)
+	imgui.text_unformatted("Press Esc to close the application")
+	imgui.text_unformatted("Press Tab to show demo window")
+	imgui.end()
+}
+
+Imgui_State :: struct {
+	opengl_state: imgl.OpenGL_State,
+}
+
+init_imgui_state :: proc(window: glfw.WindowHandle) -> Imgui_State {
+	res := Imgui_State{}
+
+	imgui.create_context()
+	imgui.style_colors_dark()
+
+	imglfw.setup_state(window, true)
+
+	imgl.setup_state(&res.opengl_state)
+
+	return res
+}
+
+imglfw_new_frame_update_inputs :: proc() {
+	imglfw.update_display_size()
+	imglfw.update_mouse()
+	imglfw.update_dt()
+}