Merge pull request #391 from JupiterRider/GuiLoadIcons

[raygui] LoadIcons-, DrawIcon-function and example added

examples/gui/icons/README.md

@@ -0,0 +1,3 @@
+This example loads a custom .rgi-file and draws the 255th icon. You can use the [rGuiIcons](https://raylibtech.itch.io/rguiicons) tool to view or create icon files.
+
+![Screenshot](./screenshot.png)

examples/gui/icons/main.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"github.com/gen2brain/raylib-go/raygui"
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+	rl.InitWindow(800, 600, "raylib-go - icons example")
+	defer rl.CloseWindow()
+
+	raygui.LoadIcons("default_icons_with_255.rgi", false)
+
+	for !rl.WindowShouldClose() {
+		rl.BeginDrawing()
+		rl.ClearBackground(rl.RayWhite)
+		raygui.DrawIcon(raygui.ICON_255, 100, 100, 8, rl.Gray)
+		rl.EndDrawing()
+	}
+}

raygui/raygui.go

@@ -8,6 +8,7 @@ package raygui
 import "C"
 
 import (
+	"image/color"
 	"strings"
 	"unsafe"
 
@@ -1381,3 +1382,15 @@ func GetFont() rl.Font {
 	ptr := unsafe.Pointer(&ret)
 	return *(*rl.Font)(ptr)
 }
+
+// LoadIcons - load raygui icons file (.rgi) into internal icons data
+func LoadIcons(fileName string, loadIconsName bool) {
+	cfileName := C.CString(fileName)
+	defer C.free(unsafe.Pointer(cfileName))
+	C.GuiLoadIcons(cfileName, C.bool(loadIconsName))
+}
+
+// DrawIcon - draw icon using pixel size at specified position
+func DrawIcon(iconId, posX, posY, pixelSize int32, col color.RGBA) {
+	C.GuiDrawIcon(C.int(iconId), C.int(posX), C.int(posY), C.int(pixelSize), *(*C.Color)(unsafe.Pointer(&col)))
+}