refactor (#36)

* refactor

* fix vig compat

* fix nanovg thingy

* e

* finalize

* gui utils package thingy

1 files changed, 148 insertions, 0 deletions

diff --git a/src/main/java/cc/polyfrost/oneconfig/internal/gui/BlurHandler.java b/src/main/java/cc/polyfrost/oneconfig/internal/gui/BlurHandler.java
new file mode 100644
index 0000000..f5c332f
--- /dev/null
+++ b/src/main/java/cc/polyfrost/oneconfig/internal/gui/BlurHandler.java
@@ -0,0 +1,148 @@
+package cc.polyfrost.oneconfig.internal.gui;
+
+import cc.polyfrost.oneconfig.events.EventManager;
+import cc.polyfrost.oneconfig.events.event.RenderEvent;
+import cc.polyfrost.oneconfig.events.event.ScreenOpenEvent;
+import cc.polyfrost.oneconfig.events.event.Stage;
+import cc.polyfrost.oneconfig.gui.OneConfigGui;
+import cc.polyfrost.oneconfig.internal.mixin.ShaderGroupAccessor;
+import gg.essential.universal.UMinecraft;
+import gg.essential.universal.UScreen;
+import me.kbrewster.eventbus.Subscribe;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.GuiScreen;
+import net.minecraft.client.shader.Shader;
+import net.minecraft.client.shader.ShaderUniform;
+import net.minecraft.util.ResourceLocation;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.List;
+
+/**
+ * An implementation of the BlurMC mod by tterrag1098.
+ * <p>
+ * For the original source see https://github.com/tterrag1098/Blur/blob/1.8.9/src/main/java/com/tterrag/blur/Blur.java
+ * For the public license, see https://github.com/tterrag1098/Blur/blob/1.8.9/LICENSE
+ * <p>
+ * License available under https://github.com/boomboompower/ToggleChat/blob/master/src/main/resources/licenses/BlurMC-License.txt
+ *
+ * @author tterrag1098, boomboompower
+ * <p>
+ * Taken from ToggleChat
+ * https://github.com/boomboompower/ToggleChat/blob/master/LICENSE
+ */
+public class BlurHandler {
+    public static BlurHandler INSTANCE = new BlurHandler();
+    private final ResourceLocation blurShader = new ResourceLocation("shaders/post/fade_in_blur.json");
+    private final Logger logger = LogManager.getLogger("OneConfig - Blur");
+    private long start;
+    private float lastProgress = 0;
+
+    /**
+     * Simply initializes the blur mod so events are properly handled by forge.
+     */
+    public void load() {
+        EventManager.INSTANCE.register(this);
+    }
+
+    @Subscribe
+    private void onGuiChange(ScreenOpenEvent event) {
+        reloadBlur(event.screen);
+    }
+
+    @Subscribe
+    private void onRenderTick(RenderEvent event) {
+        if (event.stage != Stage.END) {
+            return;
+        }
+
+        // Only blur on our own menus
+        if (UScreen.getCurrentScreen() == null) {
+            return;
+        }
+
+        // Only update the shader if one is active
+        if (!UMinecraft.getMinecraft().entityRenderer.isShaderActive()) {
+            return;
+        }
+
+        float progress = getBlurStrengthProgress();
+
+        // If the new progress value matches the old one this
+        // will skip the frame update, which (hopefully) resolves the issue
+        // with the heavy computations after the "animation" is complete.
+        if (progress == this.lastProgress) {
+            return;
+        }
+
+        // Store it for the next iteration!
+        this.lastProgress = progress;
+
+        // This is hilariously bad, and could cause frame issues on low-end computers.
+        // Why is this being computed every tick? Surely there is a better way?
+        // This needs to be optimized.
+        try {
+            final List<Shader> listShaders = ((ShaderGroupAccessor) Minecraft.getMinecraft().entityRenderer.getShaderGroup()).getListShaders();
+
+            // Should not happen. Something bad happened.
+            if (listShaders == null) {
+                return;
+            }
+
+            // Iterate through the list of shaders.
+            for (Shader shader : listShaders) {
+                ShaderUniform su = shader.getShaderManager().getShaderUniform("Progress");
+
+                if (su == null) {
+                    continue;
+                }
+
+                // All this for this.
+                su.set(progress);
+            }
+        } catch (IllegalArgumentException ex) {
+            this.logger.error("An error.png occurred while updating OneConfig's blur. Please report this!", ex);
+        }
+    }
+
+    /**
+     * Activates/deactivates the blur in the current world if
+     * one of many conditions are met, such as no current other shader
+     * is being used, we actually have the blur setting enabled
+     */
+    private void reloadBlur(GuiScreen gui) {
+        // Don't do anything if no world is loaded
+        if (UMinecraft.getWorld() == null) {
+            return;
+        }
+
+        // If a shader is not already active and the UI is
+        // a one of ours, we should load our own blur!
+        if (!UMinecraft.getMinecraft().entityRenderer.isShaderActive() && gui instanceof OneConfigGui) {
+            UMinecraft.getMinecraft().entityRenderer.loadShader(this.blurShader);
+
+            this.start = System.currentTimeMillis();
+
+            // If a shader is active and the incoming UI is null or we have blur disabled, stop using the shader.
+        } else if (UMinecraft.getMinecraft().entityRenderer.isShaderActive() && (gui == null)) {
+            String name = UMinecraft.getMinecraft().entityRenderer.getShaderGroup().getShaderGroupName();
+
+            // Only stop our specific blur ;)
+            if (!name.endsWith("fade_in_blur.json")) {
+                return;
+            }
+
+            UMinecraft.getMinecraft().entityRenderer.stopUseShader();
+        }
+    }
+
+    /**
+     * Returns the strength of the blur as determined by the duration the effect of the blur.
+     * <p>
+     * The strength of the blur does not go below 5.0F.
+     */
+    private float getBlurStrengthProgress() {
+        return Math.min((System.currentTimeMillis() - this.start) / 50F, 5.0F);
+    }
+}