add more textures examples

examples/textures/blend_modes/main.go

@@ -0,0 +1,81 @@
+package main
+
+import (
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+var (
+	screenW       = int32(1280)
+	screenH       = int32(720)
+	blendCountMax = 4
+	blendMode     = 0
+)
+
+func main() {
+
+	rl.InitWindow(screenW, screenH, "raylib [textures] example - blend modes")
+
+	bgImg := rl.LoadImage("cyberpunk_street_background.png")
+	bgTex := rl.LoadTextureFromImage(bgImg)
+
+	fgImg := rl.LoadImage("cyberpunk_street_foreground.png")
+	fgTex := rl.LoadTextureFromImage(fgImg)
+
+	rl.UnloadImage(bgImg)
+	rl.UnloadImage(fgImg)
+
+	rl.SetTargetFPS(60)
+
+	for !rl.WindowShouldClose() {
+
+		if rl.IsKeyPressed(rl.KeySpace) {
+			if blendMode >= blendCountMax-1 {
+				blendMode = 0
+			} else {
+				blendMode++
+			}
+
+		}
+
+		rl.BeginDrawing()
+		rl.ClearBackground(rl.RayWhite)
+
+		rl.DrawTexture(bgTex, screenW/2-bgTex.Width/2, screenH/2-bgTex.Height/2, rl.White)
+		rl.BeginBlendMode(rl.BlendMode(blendMode))
+		rl.DrawTexture(fgTex, screenW/2-fgTex.Width/2, screenH/2-fgTex.Height/2, rl.White)
+		rl.EndBlendMode()
+
+		txt := "Press SPACE to change blend modes"
+		txtlen := rl.MeasureText(txt, 20)
+		rl.DrawText(txt, (screenW/2)-txtlen/2, screenH-70, 20, rl.Black)
+		switch rl.BlendMode(blendMode) {
+		case rl.BlendAlpha:
+			txt = "Current rl.BlendAlpha"
+			txtlen = rl.MeasureText(txt, 20)
+			rl.DrawText(txt, (screenW/2)-txtlen/2, screenH-50, 20, rl.Black)
+		case rl.BlendAdditive:
+			txt = "Current rl.BlendAdditive"
+			txtlen = rl.MeasureText(txt, 20)
+			rl.DrawText(txt, (screenW/2)-txtlen/2, screenH-50, 20, rl.Black)
+		case rl.BlendMultiplied:
+			txt = "Current rl.BlendMultiplied"
+			txtlen = rl.MeasureText(txt, 20)
+			rl.DrawText(txt, (screenW/2)-txtlen/2, screenH-50, 20, rl.Black)
+		case rl.BlendAddColors:
+			txt = "Current rl.BlendAddColors"
+			txtlen = rl.MeasureText(txt, 20)
+			rl.DrawText(txt, (screenW/2)-txtlen/2, screenH-50, 20, rl.Black)
+		}
+
+		txt = "(c) Cyberpunk Street Environment by Luis Zuno (@ansimuz)"
+		txtlen = rl.MeasureText(txt, 10)
+		rl.DrawText(txt, (screenW/2)-txtlen/2, screenH-25, 10, rl.Black)
+
+		rl.EndDrawing()
+	}
+
+	rl.UnloadTexture(fgTex)
+	rl.UnloadTexture(bgTex)
+
+	rl.CloseWindow()
+}