using weaker and faster fullscreen blurring; this is a style choice

assets/shaders/boxdown.frag

@@ -0,0 +1,31 @@
+#version 120
+#ifdef GL_ES
+    precision mediump float;
+#endif
+
+varying vec4 v_color;
+varying vec2 v_texCoords;
+uniform sampler2D u_texture;
+
+// recommended value: n / vec2(fbo_width, fbo_height) where n is something like {0.5, 1, 2, 4, ... }
+// that, or simply 0.5, depending on how your uv coord works
+uniform vec2 halfpixel = vec2(0.0, 0.0);
+
+vec2 doublex = vec2(2.0, 0.0);
+vec2 doubley = vec2(0.0, 2.0);
+vec2 twister = vec2(1.0, -1.0);
+vec2 boolean = vec2(1.0, 0.0);
+
+void main() {
+    vec4 sum = texture2D(u_texture, v_texCoords) +
+    texture2D(u_texture, v_texCoords + halfpixel) +
+    texture2D(u_texture, v_texCoords - halfpixel) +
+    texture2D(u_texture, v_texCoords + halfpixel * twister) +
+    texture2D(u_texture, v_texCoords - halfpixel * twister) +
+    texture2D(u_texture, v_texCoords + halfpixel * boolean.xy) +
+    texture2D(u_texture, v_texCoords - halfpixel * boolean.xy) +
+    texture2D(u_texture, v_texCoords + halfpixel * boolean.yx) +
+    texture2D(u_texture, v_texCoords - halfpixel * boolean.yx) ;
+
+    gl_FragColor = sum / 9.0;
+}

assets/shaders/boxup.frag

@@ -0,0 +1,31 @@
+#version 120
+#ifdef GL_ES
+    precision mediump float;
+#endif
+
+varying vec4 v_color;
+varying vec2 v_texCoords;
+uniform sampler2D u_texture;
+
+// recommended value: n / vec2(fbo_width, fbo_height) where n is something like {0.5, 1, 2, 4, ... }
+// that, or simply 0.5, depending on how your uv coord works
+uniform vec2 halfpixel = vec2(0.0, 0.0);
+
+vec2 doublex = vec2(2.0, 0.0);
+vec2 doubley = vec2(0.0, 2.0);
+vec2 twister = vec2(1.0, -1.0);
+vec2 boolean = vec2(1.0, 0.0);
+
+void main() {
+    vec4 sum = texture2D(u_texture, v_texCoords) +
+    texture2D(u_texture, v_texCoords + halfpixel) +
+    texture2D(u_texture, v_texCoords - halfpixel) +
+    texture2D(u_texture, v_texCoords + halfpixel * twister) +
+    texture2D(u_texture, v_texCoords - halfpixel * twister) +
+    texture2D(u_texture, v_texCoords + halfpixel * boolean.xy) +
+    texture2D(u_texture, v_texCoords - halfpixel * boolean.xy) +
+    texture2D(u_texture, v_texCoords + halfpixel * boolean.yx) +
+    texture2D(u_texture, v_texCoords - halfpixel * boolean.yx) ;
+
+    gl_FragColor = sum / 9.0;
+}

src/net/torvald/terrarum/modulebasegame/IngameRenderer.kt

@@ -8,10 +8,10 @@ import com.badlogic.gdx.graphics.g2d.TextureRegion
 import com.badlogic.gdx.graphics.glutils.FrameBuffer
 import com.badlogic.gdx.graphics.glutils.ShaderProgram
 import com.badlogic.gdx.utils.Disposable
+import com.badlogic.gdx.utils.GdxRuntimeException
 import net.torvald.random.HQRNG
 import net.torvald.terrarum.*
 import net.torvald.terrarum.App.measureDebugTime
-import net.torvald.terrarum.App.printdbg
 import net.torvald.terrarum.TerrarumAppConfiguration.TILE_SIZE
 import net.torvald.terrarum.TerrarumAppConfiguration.TILE_SIZEF
 import net.torvald.terrarum.gameactors.ActorWithBody
@@ -677,12 +677,22 @@ object IngameRenderer : Disposable {
 
     private const val KAWASE_POWER = 0.667f
 
+    private var blurtex0 = Texture(16, 16, Pixmap.Format.RGBA8888)
+    private var blurtex1 = Texture(16, 16, Pixmap.Format.RGBA8888)
+    private var blurtex2 = Texture(16, 16, Pixmap.Format.RGBA8888)
+    private var blurtex3 = Texture(16, 16, Pixmap.Format.RGBA8888)
+    private var blurtex4 = Texture(16, 16, Pixmap.Format.RGBA8888)
+
+
     fun processKawaseBlur(outFbo: FrameBuffer) {
 
+        blurtex0.dispose()
+
         // initialise readBuffer with untreated lightmap
         outFbo.inAction(camera, batch) {
-            val texture = LightmapRenderer.draw()
-            texture.bind(0)
+            blurtex0 = LightmapRenderer.draw()
+            blurtex0.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear)
+            blurtex0.bind(0)
             shaderPassthru.bind()
             shaderPassthru.setUniformMatrix("u_projTrans", camera.combined)
             shaderPassthru.setUniformi("u_texture", 0)
@@ -690,8 +700,9 @@ object IngameRenderer : Disposable {
         }
 
         fboBlurHalf.inAction(camera, batch) {
-            val texture = outFbo.colorBufferTexture
-            texture.bind(0)
+            blurtex1 = outFbo.colorBufferTexture
+            blurtex1.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear)
+            blurtex1.bind(0)
             shaderKawaseDown.bind()
             shaderKawaseDown.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseDown.setUniformi("u_texture", 0)
@@ -700,8 +711,9 @@ object IngameRenderer : Disposable {
         }
 
         fboBlurQuarter.inAction(camera, batch) {
-            val texture = fboBlurHalf.colorBufferTexture
-            texture.bind(0)
+            blurtex2 = fboBlurHalf.colorBufferTexture
+            blurtex2.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear)
+            blurtex2.bind(0)
             shaderKawaseDown.bind()
             shaderKawaseDown.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseDown.setUniformi("u_texture", 0)
@@ -710,8 +722,9 @@ object IngameRenderer : Disposable {
         }
 
         fboBlurHalf.inAction(camera, batch) {
-            val texture = fboBlurQuarter.colorBufferTexture
-            texture.bind(0)
+            blurtex3 = fboBlurQuarter.colorBufferTexture
+            blurtex3.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear)
+            blurtex3.bind(0)
             shaderKawaseUp.bind()
             shaderKawaseUp.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseUp.setUniformi("u_texture", 0)
@@ -721,8 +734,8 @@ object IngameRenderer : Disposable {
 
         // TODO apply dithering on this specific draw call
         outFbo.inAction(camera, batch) {
-            val texture = fboBlurHalf.colorBufferTexture
-            texture.bind(0)
+            blurtex4 = fboBlurHalf.colorBufferTexture
+            blurtex4.bind(0)
             shaderKawaseUp.bind()
             shaderKawaseUp.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseUp.setUniformi("u_texture", 0)
@@ -732,76 +745,6 @@ object IngameRenderer : Disposable {
 
     }
 
-    fun processNoBlur() {
-        lightmapFboB.inAction(camera, batch) {
-            val texture = LightmapRenderer.draw()
-            texture.bind(0)
-
-            shaderPassthru.bind()
-            shaderPassthru.setUniformMatrix("u_projTrans", camera.combined)
-            shaderPassthru.setUniformi("u_texture", 0)
-            blurWriteQuad.render(shaderPassthru, GL20.GL_TRIANGLES)
-        }
-    }
-
-    fun processBlur(lightmapFboA: FrameBuffer, lightmapFboB: FrameBuffer) {
-        var blurWriteBuffer = lightmapFboA
-        var blurReadBuffer = lightmapFboB
-
-
-        // buffers must be cleared beforehand
-
-
-        // initialise readBuffer with untreated lightmap
-        blurReadBuffer.inAction(camera, batch) {
-            val texture = LightmapRenderer.draw()
-            texture.bind(0)
-
-            shaderPassthru.bind()
-            shaderPassthru.setUniformMatrix("u_projTrans", camera.combined)
-            shaderPassthru.setUniformi("u_texture", 0)
-            blurWriteQuad.render(shaderPassthru, GL20.GL_TRIANGLES)
-        }
-
-        // do blurring
-        for (i in 0 until 4) {
-            val blurRadius = (4f / lightmapDownsample) * (1 shl i.ushr(1))
-
-            blurWriteBuffer.inAction(camera, batch) {
-
-
-                blurTex.texture = blurReadBuffer.colorBufferTexture
-                blurTex.texture.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear)
-                blurTex.texture.bind(0)
-                App.getCurrentDitherTex().bind(1) // order is important!
-
-                shaderBlur.bind()
-                shaderBlur.setUniformMatrix("u_projTrans", camera.combined)
-                shaderBlur.setUniformi("rnd", rng.nextInt(8192), rng.nextInt(8192))
-                shaderBlur.setUniformi("u_pattern", 1)
-                shaderBlur.setUniformi("u_texture", 0)
-                shaderBlur.setUniformf("iResolution",
-                        blurWriteBuffer.width.toFloat(), blurWriteBuffer.height.toFloat())
-                shaderBlur.setUniformf("flip", 1f)
-                if (i % 2 == 0)
-                    shaderBlur.setUniformf("direction", blurRadius, 0f)
-                else
-                    shaderBlur.setUniformf("direction", 0f, blurRadius)
-                blurWriteQuad.render(shaderBlur, GL20.GL_TRIANGLES)
-
-
-                // swap
-                val t = blurWriteBuffer
-                blurWriteBuffer = blurReadBuffer
-                blurReadBuffer = t
-            }
-        }
-
-
-
-        blendNormal(batch)
-    }
-
     private var init = false
 
     fun resize(width: Int, height: Int) {
@@ -914,6 +857,12 @@ object IngameRenderer : Disposable {
         lightmapFboA.dispose()
         lightmapFboB.dispose()
 
+        try { blurtex0.dispose() } catch (e: GdxRuntimeException) {}
+//        try { blurtex1.dispose() } catch (e: GdxRuntimeException) {}
+//        try { blurtex2.dispose() } catch (e: GdxRuntimeException) {}
+//        try { blurtex3.dispose() } catch (e: GdxRuntimeException) {}
+//        try { blurtex4.dispose() } catch (e: GdxRuntimeException) {}
+
         fboBlurHalf.dispose()
         fboBlurQuarter.dispose()
 

src/net/torvald/terrarum/ui/Toolkit.kt

@@ -6,14 +6,10 @@ import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import com.badlogic.gdx.graphics.g2d.TextureRegion
 import com.badlogic.gdx.graphics.glutils.FrameBuffer
 import com.badlogic.gdx.utils.Disposable
-import com.badlogic.gdx.utils.GdxRuntimeException
-import com.badlogic.gdx.utils.ScreenUtils
 import net.torvald.random.HQRNG
 import net.torvald.terrarum.App
-import net.torvald.terrarum.App.printdbg
 import net.torvald.terrarum.CommonResourcePool
 import net.torvald.terrarum.inAction
-import net.torvald.terrarum.modulebasegame.IngameRenderer
 import net.torvald.terrarumsansbitmap.gdx.TextureRegionPack
 import org.lwjgl.opengl.GL20
 
@@ -35,8 +31,8 @@ object Toolkit : Disposable {
     }
 
 
-    private val shaderKawaseDown = App.loadShaderFromFile("assets/shaders/4096.vert", "assets/shaders/kawasedown.frag")
-    private val shaderKawaseUp = App.loadShaderFromFile("assets/shaders/4096.vert", "assets/shaders/kawaseup.frag")
+    private val shaderKawaseDown = App.loadShaderFromFile("assets/shaders/4096.vert", "assets/shaders/boxdown.frag")
+    private val shaderKawaseUp = App.loadShaderFromFile("assets/shaders/4096.vert", "assets/shaders/boxup.frag")
 
     private lateinit var fboBlur: FrameBuffer
     private lateinit var fboBlurHalf: FrameBuffer
@@ -80,7 +76,10 @@ object Toolkit : Disposable {
         shaderKawaseUp.dispose()
         shaderKawaseDown.dispose()
 
-        try { blurIntexture.dispose() } catch (e: GdxRuntimeException) {}
+//        try { blurtex0.dispose() } catch (e: GdxRuntimeException) {}
+//        try { blurtex1.dispose() } catch (e: GdxRuntimeException) {}
+//        try { blurtex2.dispose() } catch (e: GdxRuntimeException) {}
+//        try { blurtex3.dispose() } catch (e: GdxRuntimeException) {}
     }
 
     val drawWidth: Int
@@ -152,17 +151,31 @@ object Toolkit : Disposable {
 
     }
 
-    private var blurIntexture = Texture(16, 16, Pixmap.Format.RGBA8888)
+//    private var blurtex0 = Texture(16, 16, Pixmap.Format.RGBA8888)
+    private var blurtex1 = Texture(16, 16, Pixmap.Format.RGBA8888)
+    private var blurtex2 = Texture(16, 16, Pixmap.Format.RGBA8888)
+    private var blurtex3 = Texture(16, 16, Pixmap.Format.RGBA8888)
 
     fun blurEntireScreen(batch: SpriteBatch, camera: OrthographicCamera, blurRadius0: Float, x: Int, y: Int, w: Int, h: Int) {
-
         batch.end()
 
-        val blurRadius = blurRadius0 * 2f
-        blurIntexture = Texture(Pixmap.createFromFrameBuffer(x, y, w, h))
+        val blurRadius = blurRadius0
 
-        fboBlurHalf.inAction(camera, batch) {
-            blurIntexture.bind(0)
+//        blurtex0.dispose()
+//        blurtex1.dispose()
+//        blurtex2.dispose()
+//        blurtex3.dispose()
+
+
+
+        val pixmap = Pixmap.createFromFrameBuffer(x, y, w, h)
+        val texture: Texture = Texture(pixmap)
+        val t = TextureRegion(texture, 0, h, w, -h)
+        pixmap.dispose()
+
+
+        /*fboBlurHalf.inAction(camera, batch) {
+            t.texture.bind(0)
             shaderKawaseDown.bind()
             shaderKawaseDown.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseDown.setUniformi("u_texture", 0)
@@ -171,8 +184,8 @@ object Toolkit : Disposable {
         }
 
         fboBlurQuarter.inAction(camera, batch) {
-            val texture = fboBlurHalf.colorBufferTexture
-            texture.bind(0)
+            blurtex1 = fboBlurHalf.colorBufferTexture
+            blurtex1.bind(0)
             shaderKawaseDown.bind()
             shaderKawaseDown.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseDown.setUniformi("u_texture", 0)
@@ -181,8 +194,8 @@ object Toolkit : Disposable {
         }
 
         fboBlurHalf.inAction(camera, batch) {
-            val texture = fboBlurQuarter.colorBufferTexture
-            texture.bind(0)
+            blurtex2 = fboBlurQuarter.colorBufferTexture
+            blurtex2.bind(0)
             shaderKawaseUp.bind()
             shaderKawaseUp.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseUp.setUniformi("u_texture", 0)
@@ -192,8 +205,30 @@ object Toolkit : Disposable {
 
         // TODO apply dithering on this specific draw call
         fboBlur.inAction(camera,  batch) {
-            val texture = fboBlurHalf.colorBufferTexture
-            texture.bind(0)
+            blurtex3 = fboBlurHalf.colorBufferTexture
+            blurtex3.bind(0)
+            shaderKawaseUp.bind()
+            shaderKawaseUp.setUniformMatrix("u_projTrans", camera.combined)
+            shaderKawaseUp.setUniformi("u_texture", 0)
+            shaderKawaseUp.setUniformf("halfpixel", blurRadius / fboBlurHalf.width, blurRadius / fboBlurHalf.height)
+            blurWriteQuad.render(shaderKawaseUp, GL20.GL_TRIANGLES)
+        }*/
+
+
+        fboBlurHalf.inAction(camera, batch) {
+            t.texture.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear)
+            t.texture.bind(0)
+            shaderKawaseDown.bind()
+            shaderKawaseDown.setUniformMatrix("u_projTrans", camera.combined)
+            shaderKawaseDown.setUniformi("u_texture", 0)
+            shaderKawaseDown.setUniformf("halfpixel", blurRadius / fboBlurHalf.width, blurRadius / fboBlurHalf.height)
+            blurWriteQuad2.render(shaderKawaseDown, GL20.GL_TRIANGLES)
+        }
+
+        fboBlur.inAction(camera,  batch) {
+            blurtex3 = fboBlurHalf.colorBufferTexture
+            blurtex3.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear)
+            blurtex3.bind(0)
             shaderKawaseUp.bind()
             shaderKawaseUp.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseUp.setUniformi("u_texture", 0)
@@ -201,13 +236,13 @@ object Toolkit : Disposable {
             blurWriteQuad.render(shaderKawaseUp, GL20.GL_TRIANGLES)
         }
 
+        t.texture.dispose()
 
-        blurIntexture.dispose()
         Gdx.gl.glActiveTexture(GL20.GL_TEXTURE0) // so that batch that comes next will bind any tex to it
 
         batch.begin()
         batch.shader = null
-        batch.draw(fboBlur.colorBufferTexture, x.toFloat(), y.toFloat(), w.toFloat(), h.toFloat())
+        batch.draw(fboBlur.colorBufferTexture, x.toFloat(), y.toFloat())
     }
 
     fun drawBaloon(batch: SpriteBatch, x: Float, y: Float, w: Float, h: Float) {
@@ -264,44 +299,47 @@ object Toolkit : Disposable {
                 VertexAttribute.TexCoords(0)
         )
 
+        val fw = App.scr.width//MathUtils.nextPowerOfTwo(App.scr.width)
+        val fh = App.scr.height//MathUtils.nextPowerOfTwo(App.scr.height)
+
         fboBlur = FrameBuffer(
                 Pixmap.Format.RGBA8888,
-                App.scr.width,
-                App.scr.height,
+                fw,
+                fh,
                 true
         )
         fboBlurHalf = FrameBuffer(
                 Pixmap.Format.RGBA8888,
-                App.scr.width / 2,
-                App.scr.height / 2,
+                fw / 2,
+                fh / 2,
                 true
         )
         fboBlurQuarter = FrameBuffer(
                 Pixmap.Format.RGBA8888,
-                App.scr.width / 4,
-                App.scr.height / 4,
+                fw / 4,
+                fh / 4,
                 true
         )
 
         blurWriteQuad.setVertices(floatArrayOf(
                 0f,0f,0f, 1f,1f,1f,1f, 0f,1f,
-                App.scr.width.toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
-                App.scr.width.toFloat(), App.scr.height.toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
-                0f, App.scr.height.toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
+                fw.toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
+                fw.toFloat(), fh.toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
+                0f, fh.toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
         blurWriteQuad.setIndices(shortArrayOf(0, 1, 2, 2, 3, 0))
 
         blurWriteQuad2.setVertices(floatArrayOf(
                 0f,0f,0f, 1f,1f,1f,1f, 0f,1f,
-                App.scr.width.div(2).toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
-                App.scr.width.div(2).toFloat(), App.scr.height.div(2).toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
-                0f, App.scr.height.div(2).toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
+                fw.div(2).toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
+                fw.div(2).toFloat(), fh.div(2).toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
+                0f, fh.div(2).toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
         blurWriteQuad2.setIndices(shortArrayOf(0, 1, 2, 2, 3, 0))
 
         blurWriteQuad4.setVertices(floatArrayOf(
                 0f,0f,0f, 1f,1f,1f,1f, 0f,1f,
-                App.scr.width.div(4).toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
-                App.scr.width.div(4).toFloat(), App.scr.height.div(4).toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
-                0f, App.scr.height.div(4).toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
+                fw.div(4).toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
+                fw.div(4).toFloat(), fh.div(4).toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
+                0f, fh.div(4).toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
         blurWriteQuad4.setIndices(shortArrayOf(0, 1, 2, 2, 3, 0))
     }
 }