Added support for rendering rounded rectangles. #851

5 files changed, 116 insertions, 26 deletions

diff --git a/src/main/java/at/hannibal2/skyhanni/utils/RenderUtils.kt b/src/main/java/at/hannibal2/skyhanni/utils/RenderUtils.kt
index 7c26c03e2..193beda2a 100644
--- a/src/main/java/at/hannibal2/skyhanni/utils/RenderUtils.kt
+++ b/src/main/java/at/hannibal2/skyhanni/utils/RenderUtils.kt
@@ -6,14 +6,18 @@ import at.hannibal2.skyhanni.data.GuiEditManager.Companion.getAbsX
 import at.hannibal2.skyhanni.data.GuiEditManager.Companion.getAbsY
 import at.hannibal2.skyhanni.events.GuiRenderItemEvent
 import at.hannibal2.skyhanni.events.LorenzRenderWorldEvent
+import at.hannibal2.skyhanni.features.misc.RoundedRectangleShader
 import at.hannibal2.skyhanni.test.command.ErrorManager
 import at.hannibal2.skyhanni.utils.renderables.Renderable
 import at.hannibal2.skyhanni.utils.renderables.RenderableUtils.renderXAligned
+import at.hannibal2.skyhanni.utils.shader.ShaderManager
 import io.github.moulberry.moulconfig.internal.TextRenderUtils
 import io.github.moulberry.notenoughupdates.util.Utils
+import java.awt.Color
 import net.minecraft.client.Minecraft
 import net.minecraft.client.gui.FontRenderer
 import net.minecraft.client.gui.Gui
+import net.minecraft.client.gui.ScaledResolution
 import net.minecraft.client.renderer.GlStateManager
 import net.minecraft.client.renderer.Tessellator
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats
@@ -25,7 +29,6 @@ import net.minecraft.util.AxisAlignedBB
 import net.minecraft.util.MathHelper
 import net.minecraft.util.ResourceLocation
 import org.lwjgl.opengl.GL11
-import java.awt.Color
 import kotlin.math.cos
 import kotlin.math.sin
 import kotlin.math.sqrt
@@ -1130,4 +1133,39 @@ object RenderUtils {
         GlStateManager.enableLighting()
         GlStateManager.enableDepth()
     }
+
+    /**
+     * Method to draw a rounded rectangle.
+     *
+     * **NOTE:** If you are using [GlStateManager.translate] or [GlStateManager.scale]
+     * with this method, ensure they are invoked in the correct order if you use both. That is, [GlStateManager.translate]
+     * is called **BEFORE** [GlStateManager.scale], otherwise the rectangle will not be rendered correctly
+     *
+     * @param color color of rect
+     * @param radius the radius of the corners (default 10)
+     * @param smoothness how smooth the corners will appear (default 2). NOTE: This does very
+     * little to the smoothness of the corners in reality due to how the final pixel color is calculated.
+     * It is best kept at its default.
+     */
+    fun drawRoundRect(x: Int, y: Int, width: Int, height: Int, color: Int, radius: Int = 10, smoothness: Int = 1) {
+        val scaledRes = ScaledResolution(Minecraft.getMinecraft())
+        val widthIn = width * scaledRes.scaleFactor
+        val heightIn = height * scaledRes.scaleFactor
+        val xIn = x * scaledRes.scaleFactor
+        val yIn = y * scaledRes.scaleFactor
+
+        RoundedRectangleShader.scaleFactor = scaledRes.scaleFactor.toFloat()
+        RoundedRectangleShader.radius = radius.toFloat()
+        RoundedRectangleShader.smoothness = smoothness.toFloat()
+        RoundedRectangleShader.halfSize = floatArrayOf(widthIn / 2f, heightIn / 2f)
+        RoundedRectangleShader.centerPos = floatArrayOf(xIn + (widthIn / 2f), yIn + (heightIn / 2f))
+
+        GlStateManager.pushMatrix()
+        ShaderManager.enableShader("rounded_rect")
+
+        Gui.drawRect(x, y, x + width, y + height, color)
+
+        ShaderManager.disableShader()
+        GlStateManager.popMatrix()
+    }
 }
diff --git a/src/main/java/at/hannibal2/skyhanni/utils/shader/Shader.kt b/src/main/java/at/hannibal2/skyhanni/utils/shader/Shader.kt
index 7fb13ab86..6a95655ca 100644
--- a/src/main/java/at/hannibal2/skyhanni/utils/shader/Shader.kt
+++ b/src/main/java/at/hannibal2/skyhanni/utils/shader/Shader.kt
@@ -1,10 +1,12 @@
 package at.hannibal2.skyhanni.utils.shader
 
+import at.hannibal2.skyhanni.test.command.ErrorManager
 import at.hannibal2.skyhanni.utils.LorenzUtils
+import java.util.function.Supplier
 import net.minecraft.client.shader.ShaderLinkHelper
 import org.apache.commons.lang3.StringUtils
 import org.lwjgl.opengl.GL11
-import java.util.function.Supplier
+import org.lwjgl.opengl.OpenGLException
 
 /**
  * Superclass for shader objects to compile and attach vertex and fragment shaders to the shader program
@@ -18,23 +20,39 @@ abstract class Shader(vertex: String, fragment: String) {
     var shaderProgram: Int = ShaderLinkHelper.getStaticShaderLinkHelper().createProgram()
     private val uniforms: MutableList<Uniform<*>> = mutableListOf()
 
+    var created = false
+
     init {
-        val vertexShaderID = ShaderManager.loadShader(ShaderType.VERTEX, vertex)
-        ShaderManager.attachShader(shaderProgram, vertexShaderID)
-        val fragmentShaderID = ShaderManager.loadShader(ShaderType.FRAGMENT, fragment)
-        ShaderManager.attachShader(shaderProgram, fragmentShaderID)
-
-        ShaderHelper.glLinkProgram(shaderProgram)
-
-        val linkStatus = ShaderHelper.glGetProgrami(shaderProgram, ShaderHelper.GL_LINK_STATUS)
-        if (linkStatus == GL11.GL_FALSE) {
-            LorenzUtils.consoleLog(
-                "Error occurred when linking program with Vertex Shader: $vertex and Fragment Shader: $fragment : " +
-                    StringUtils.trim(ShaderHelper.glGetProgramInfoLog(shaderProgram, 1024))
-            )
-        }
+        run {
+            val vertexShaderID = ShaderManager.loadShader(ShaderType.VERTEX, vertex).also { if (it == -1) return@run }
+            ShaderManager.attachShader(shaderProgram, vertexShaderID)
+
+            val fragmentShaderID = ShaderManager.loadShader(ShaderType.FRAGMENT, fragment).also { if (it == -1) return@run }
+            ShaderManager.attachShader(shaderProgram, fragmentShaderID)
 
-        this.registerUniforms()
+            ShaderHelper.glLinkProgram(shaderProgram)
+
+            if (ShaderHelper.glGetProgrami(shaderProgram, ShaderHelper.GL_LINK_STATUS) == GL11.GL_FALSE) {
+                val errorMessage = "Failed to link vertex shader $vertex and fragment shader $fragment. Features that " +
+                        "utilise this shader will not work correctly, if at all."
+                val errorLog = StringUtils.trim(ShaderHelper.glGetShaderInfoLog(shaderProgram, 1024))
+
+                if (ShaderManager.inWorld()) {
+                    ErrorManager.logErrorWithData(
+                            OpenGLException("Shader linking error."),
+                            errorMessage,
+                            "Link Error:\n" to errorLog
+                    )
+                } else {
+                    LorenzUtils.consoleLog("$errorMessage $errorLog")
+                }
+
+                return@run
+            }
+
+            this.registerUniforms()
+            created = true
+        }
     }
 
     abstract fun registerUniforms()
diff --git a/src/main/java/at/hannibal2/skyhanni/utils/shader/ShaderHelper.kt b/src/main/java/at/hannibal2/skyhanni/utils/shader/ShaderHelper.kt
index 6f24d0e89..6e36285b1 100644
--- a/src/main/java/at/hannibal2/skyhanni/utils/shader/ShaderHelper.kt
+++ b/src/main/java/at/hannibal2/skyhanni/utils/shader/ShaderHelper.kt
@@ -137,6 +137,14 @@ class ShaderHelper {
             if (USING_ARB_SHADERS) ARBShaderObjects.glUniform1fARB(location, v0) else GL20.glUniform1f(location, v0)
         }
 
+        fun glUniform2f(location: Int, v0: Float, v1: Float) {
+            if (USING_ARB_SHADERS) ARBShaderObjects.glUniform2fARB(location, v0, v1) else GL20.glUniform2f(
+                    location,
+                    v0,
+                    v1
+            )
+        }
+
         fun glUniform3f(location: Int, v0: Float, v1: Float, v2: Float) {
             if (USING_ARB_SHADERS) ARBShaderObjects.glUniform3fARB(location, v0, v1, v2) else GL20.glUniform3f(
                 location,
diff --git a/src/main/java/at/hannibal2/skyhanni/utils/shader/ShaderManager.kt b/src/main/java/at/hannibal2/skyhanni/utils/shader/ShaderManager.kt
index 6df5c92f8..f9b5541c5 100644
--- a/src/main/java/at/hannibal2/skyhanni/utils/shader/ShaderManager.kt
+++ b/src/main/java/at/hannibal2/skyhanni/utils/shader/ShaderManager.kt
@@ -1,12 +1,15 @@
 package at.hannibal2.skyhanni.utils.shader
 
 import at.hannibal2.skyhanni.features.chroma.ChromaShader
+import at.hannibal2.skyhanni.features.misc.RoundedRectangleShader
+import at.hannibal2.skyhanni.test.command.ErrorManager
 import at.hannibal2.skyhanni.utils.LorenzUtils
+import java.io.BufferedReader
+import java.io.InputStreamReader
 import net.minecraft.client.Minecraft
 import net.minecraft.util.ResourceLocation
 import org.apache.commons.lang3.StringUtils
-import java.io.BufferedReader
-import java.io.InputStreamReader
+import org.lwjgl.opengl.OpenGLException
 
 /**
  * Object to handle shaders for SkyHanni
@@ -19,12 +22,14 @@ object ShaderManager {
      */
     enum class Shaders(val shader: Shader) {
 
-        CHROMA(ChromaShader.INSTANCE);
+        CHROMA(ChromaShader.INSTANCE),
+        ROUNDED_RECTANGLE(RoundedRectangleShader.INSTANCE);
 
         companion object {
 
             fun getShaderInstance(shaderName: String): Shader? = when (shaderName) {
                 "chroma" -> CHROMA.shader
+                "rounded_rect" -> ROUNDED_RECTANGLE.shader
                 else -> {
                     null
                 }
@@ -44,6 +49,8 @@ object ShaderManager {
             shaders[shaderName] = shader
         }
 
+        if (!shader.created) return
+
         activeShader = shader
         shader.enable()
         shader.updateUniforms()
@@ -75,14 +82,27 @@ object ShaderManager {
         ShaderHelper.glCompileShader(shaderID)
 
         if (ShaderHelper.glGetShaderi(shaderID, ShaderHelper.GL_COMPILE_STATUS) == 0) {
-            LorenzUtils.consoleLog(
-                "Error occurred when compiling shader $fileName${type.extension} : " +
-                    StringUtils.trim(ShaderHelper.glGetShaderInfoLog(shaderID, 1024))
-            )
+            val errorMessage = "Failed to compile shader $fileName${type.extension}. Features that utilise this " +
+                    "shader will not work correctly, if at all."
+            val errorLog = StringUtils.trim(ShaderHelper.glGetShaderInfoLog(shaderID, 1024))
+
+            if (inWorld()) {
+                ErrorManager.logErrorWithData(
+                        OpenGLException("Shader compilation error."),
+                        errorMessage,
+                        "GLSL Compilation Error:\n" to errorLog
+                        )
+            } else {
+                LorenzUtils.consoleLog("$errorMessage $errorLog")
+            }
+
+            return -1
         }
 
         return shaderID
     }
+
+    fun inWorld() = (Minecraft.getMinecraft().theWorld != null) && (Minecraft.getMinecraft().thePlayer != null)
 }
 
 enum class ShaderType(val extension: String, val shaderType: Int) {
diff --git a/src/main/java/at/hannibal2/skyhanni/utils/shader/Uniform.kt b/src/main/java/at/hannibal2/skyhanni/utils/shader/Uniform.kt
index c9602d423..496d9c46c 100644
--- a/src/main/java/at/hannibal2/skyhanni/utils/shader/Uniform.kt
+++ b/src/main/java/at/hannibal2/skyhanni/utils/shader/Uniform.kt
@@ -21,6 +21,7 @@ class Uniform<T>(
         companion object {
 
             val FLOAT: UniformType<Float> = UniformType()
+            val VEC2: UniformType<FloatArray> = UniformType()
             val VEC3: UniformType<FloatArray> = UniformType()
             val BOOL: UniformType<Boolean> = UniformType()
         }
@@ -33,12 +34,17 @@ class Uniform<T>(
         val newUniformValue: T = uniformValuesSupplier.get()
         if (!Objects.deepEquals(previousUniformValue, newUniformValue)) {
             when (uniformType) {
-                UniformType.FLOAT -> ShaderHelper.glUniform1f(uniformID, (newUniformValue as Float))
+                UniformType.FLOAT -> {
+                    ShaderHelper.glUniform1f(uniformID, (newUniformValue as Float))
+                }
+                UniformType.VEC2 -> {
+                    val values = newUniformValue as FloatArray
+                    ShaderHelper.glUniform2f(uniformID, values[0], values[1])
+                }
                 UniformType.VEC3 -> {
                     val values = newUniformValue as FloatArray
                     ShaderHelper.glUniform3f(uniformID, values[0], values[1], values[2])
                 }
-
                 UniformType.BOOL -> ShaderHelper.glUniform1f(uniformID, if (newUniformValue as Boolean) 1f else 0f)
             }
             previousUniformValue = newUniformValue