incremental sparse allocation, clear viewport on resize

src/main/java/me/cortex/voxy/client/core/rendering/Viewport.java

@@ -111,7 +111,9 @@ public abstract class Viewport <A extends Viewport<A>> {
                 (float) (this.cameraY-(sy<<5)),
                 (float) (this.cameraZ-(sz<<5)));
 
-        this.depthBoundingBuffer.resize(this.width, this.height);
+        if (this.depthBoundingBuffer.resize(this.width, this.height)) {
+            this.depthBoundingBuffer.clear(0.0f);
+        }
 
         return (A) this;
     }

src/main/java/me/cortex/voxy/client/core/rendering/section/geometry/BasicSectionGeometryData.java

@@ -34,12 +34,12 @@ public class BasicSectionGeometryData implements IGeometryData {
         Logger.info("if your game crashes/exits here without any other log message, try manually decreasing the geometry capacity");
         glGetError();//Clear any errors
         GlBuffer buffer = null;
-        if (!(Capabilities.INSTANCE.isNvidia && ThreadUtils.isWindows)) {
+        if (!(Capabilities.INSTANCE.isNvidia)) {// && ThreadUtils.isWindows
             buffer = new GlBuffer(geometryCapacity, false);//Only do this if we are not on nvidia
             //TODO: FIXME: TEST, see if the issue is that we are trying to zero the entire buffer, try only zeroing increments
             // or dont zero it at all
         } else {
-            Logger.info("Running on windows nvidia, using workaround sparse buffer allocation");
+            Logger.info("Running on nvidia, using workaround sparse buffer allocation");
         }
         int error = glGetError();
         if (error != GL_NO_ERROR || buffer == null) {
@@ -116,6 +116,9 @@ public class BasicSectionGeometryData implements IGeometryData {
         glFinish();
         if (Capabilities.INSTANCE.canQueryGpuMemory) {
             long releaseSize = (long) (this.geometryBuffer.size()*0.75);//if gpu memory usage drops by 75% of the expected value assume we freed it
+            if (this.geometryBuffer.isSparse()) {//If we are using sparse buffers, use the commited size instead
+                releaseSize = (long)(this.sparseCommitment*0.75);
+            }
             if (Capabilities.INSTANCE.getFreeDedicatedGpuMemory()-gpuMemory<=releaseSize) {
                 Logger.info("Attempting to wait for gpu memory to release");
                 long start = System.currentTimeMillis();

src/main/java/me/cortex/voxy/client/core/rendering/util/DepthFramebuffer.java

@@ -22,14 +22,16 @@ public class DepthFramebuffer {
         this.depthType = depthType;
     }
 
-    public void resize(int width, int height) {
+    public boolean resize(int width, int height) {
         if (this.depthBuffer == null || this.depthBuffer.getWidth() != width || this.depthBuffer.getHeight() != height) {
             if (this.depthBuffer != null) {
                 this.depthBuffer.free();
             }
             this.depthBuffer = new GlTexture().store(this.depthType, 1, width, height);
             this.framebuffer.bind(this.depthType == GL_DEPTH24_STENCIL8?GL_DEPTH_STENCIL_ATTACHMENT: GL_DEPTH_ATTACHMENT, this.depthBuffer).verify();
+            return true;
         }
+        return false;
     }
 
     public void clear() {