Add Texture and TextureView

src/main/kotlin/net/shadowfacts/asmr/TestCacaoScreen.kt

@@ -1,5 +1,6 @@
 package net.shadowfacts.asmr
 
+import net.minecraft.util.Identifier
 import net.shadowfacts.kiwidsl.dsl
 import net.shadowfacts.cacao.CacaoScreen
 import net.shadowfacts.cacao.view.View
@@ -7,8 +8,10 @@ import net.shadowfacts.cacao.Window
 import net.shadowfacts.cacao.geometry.Axis
 import net.shadowfacts.cacao.geometry.Size
 import net.shadowfacts.cacao.util.Color
+import net.shadowfacts.cacao.util.Texture
 import net.shadowfacts.cacao.view.Label
 import net.shadowfacts.cacao.view.StackView
+import net.shadowfacts.cacao.view.TextureView
 import net.shadowfacts.cacao.view.button.Button
 
 /**
@@ -21,9 +24,8 @@ class TestCacaoScreen: CacaoScreen() {
 			val stack = addView(StackView(Axis.VERTICAL, StackView.Distribution.CENTER).apply {
 				backgroundColor = Color.WHITE
 			})
-			val red = stack.addArrangedSubview(View().apply {
+			val red = stack.addArrangedSubview(TextureView(Texture(Identifier("textures/block/birch_log_top.png"), 0, 0, 16, 16)).apply {
 				intrinsicContentSize = Size(50.0, 50.0)
-				backgroundColor = Color(0xff0000)
 			})
 			val green = stack.addArrangedSubview(View().apply {
 				intrinsicContentSize = Size(75.0, 100.0)

src/main/kotlin/net/shadowfacts/cacao/CacaoScreen.kt

@@ -35,6 +35,8 @@ open class CacaoScreen: Screen(TextComponent("CacaoScreen")) {
 	}
 
 	override fun render(mouseX: Int, mouseY: Int, delta: Float) {
+		renderBackground()
+
 		val mouse = Point(mouseX, mouseY)
 		windows.forEach {
 			it.draw(mouse, delta)

src/main/kotlin/net/shadowfacts/cacao/util/RenderHelper.kt

@@ -1,7 +1,9 @@
 package net.shadowfacts.cacao.util
 
 import com.mojang.blaze3d.platform.GlStateManager
+import net.minecraft.client.MinecraftClient
 import net.minecraft.client.gui.DrawableHelper
+import net.shadowfacts.cacao.geometry.Point
 import net.shadowfacts.cacao.geometry.Rect
 
 /**
@@ -22,6 +24,18 @@ object RenderHelper {
 		DrawableHelper.fill(rect.left.toInt(), rect.top.toInt(), rect.right.toInt(), rect.bottom.toInt(), color.argb)
 	}
 
+	/**
+	 * Draws the given [texture] filling the [rect].
+	 */
+	fun draw(rect: Rect, texture: Texture) {
+		if (disabled) return
+		color(1f, 1f, 1f, 1f)
+		MinecraftClient.getInstance().textureManager.bindTexture(texture.location)
+		val u = texture.u / texture.width.toFloat()
+		val v = texture.v / texture.height.toFloat()
+		DrawableHelper.blit(rect.left.toInt(), rect.top.toInt(), u, v, rect.width.toInt(), rect.height.toInt(), texture.width, texture.height)
+	}
+
 	/**
 	 * @see org.lwjgl.opengl.GL11.glPushMatrix
 	 */
@@ -46,4 +60,9 @@ object RenderHelper {
 		GlStateManager.translated(x, y, z)
 	}
 
+	fun color(r: Float, g: Float, b: Float, alpha: Float) {
+		if (disabled) return
+		GlStateManager.color4f(r, g, b, alpha)
+	}
+
 }

src/main/kotlin/net/shadowfacts/cacao/util/Texture.kt

@@ -0,0 +1,15 @@
+package net.shadowfacts.cacao.util
+
+import net.minecraft.util.Identifier
+
+/**
+ * A helper class that represents a texture.
+ *
+ * @author shadowfacts
+ * @param location The identifier representing the resource-pack location of the texture image.
+ * @param u The X coordinate in pixels of where the texture starts within the image.
+ * @param v The Y coordinate in pixels of where the texture starts within the image.
+ * @param width The width in pixels of the entire image.
+ * @param height The height in pixels of the entire image.
+ */
+data class Texture(val location: Identifier, val u: Int, val v: Int, val width: Int = 256, val height: Int = 256)

src/main/kotlin/net/shadowfacts/cacao/view/TextureView.kt

@@ -0,0 +1,19 @@
+package net.shadowfacts.cacao.view
+
+import net.shadowfacts.cacao.geometry.Point
+import net.shadowfacts.cacao.util.RenderHelper
+import net.shadowfacts.cacao.util.Texture
+
+/**
+ * A helper class for drawing a [Texture] in a view.
+ * `TextureView` will draw the given texture filling the bounds of the view.
+ *
+ * @author shadowfacts
+ */
+class TextureView(val texture: Texture): View() {
+
+	override fun drawContent(mouse: Point, delta: Float) {
+		RenderHelper.draw(bounds, texture)
+	}
+
+}