Use downscaling to sixteenth res for bloom

src/Data/Preload/Render.hs

@@ -29,8 +29,8 @@ data RenderData = RenderData
     , _silhouetteEBO :: UintBO
     , _pictureShaders :: MV.MVector (PrimState IO) (GLuint,VBO)
     , _fboFullscreen :: (FBO,TO)
-    , _fboHalf1 :: (FBO, TO)
-    , _fboHalf2 :: (FBO, TO)
+    , _fboHalf :: (FBO, TO)
+    , _fboQuarter :: (FBO, TO)
     , _fboBase :: (FBO, (TO, TO, TO))
     , _fboCloud :: (FBO, (TO, TO, TO))
     , _fboWindow :: (FBO, (TO, TO))

src/Dodge/Render.hs

@@ -205,7 +205,7 @@ doDrawing' win pdata u = do
 
     --setup downscale viewport for blurring bloom
     setViewport _gr_downsize_res cfig
-    glBindFramebuffer GL_FRAMEBUFFER (_unFBO (fst (_fboHalf1 pdata)))
+    glBindFramebuffer GL_FRAMEBUFFER (_unFBO (fst (_fboHalf pdata)))
     glDepthFunc GL_ALWAYS
     glBindTextureUnit 0 (pdata ^. fboBloom . _2 . unTO)
     glGenerateTextureMipmap (pdata ^. fboBloom . _2 . unTO)
@@ -221,13 +221,19 @@ doDrawing' win pdata u = do
     glUseProgram (_bloomBlurShader pdata)
     --glDrawArrays GL_TRIANGLES 0 6
     glDrawArrays GL_TRIANGLES 0 3
-    when (cfig ^. gr_bloom) $ do
-        replicateM_ 1 $
-            pingPongBetween
-                (_fboHalf1 pdata)
-                (_fboHalf2 pdata)
-                (_bloomBlurShader pdata)
-        glEnable GL_BLEND
+    glBindFramebuffer GL_FRAMEBUFFER $ pdata ^. fboQuarter . _1 . unFBO
+    glGenerateTextureMipmap (pdata ^. fboHalf . _2 . unTO)
+    glBindTextureUnit 0 (pdata ^. fboHalf . _2 . unTO)
+    setViewport (const SixteenthRes) cfig
+    glDrawArrays GL_TRIANGLES 0 3
+    glEnable GL_BLEND
+--    when (cfig ^. gr_bloom) $ do
+--        replicateM_ 1 $
+--            pingPongBetween
+--                (_fboHalf1 pdata)
+--                (_fboHalf2 pdata)
+--                (_bloomBlurShader pdata)
+--        glEnable GL_BLEND
     setViewport _gr_world_res cfig
     --draw clouds onto cloud buffer
     glBindFramebuffer GL_FRAMEBUFFER (pdata ^. fboCloud . _1 . unFBO)
@@ -354,7 +360,7 @@ doDrawing' win pdata u = do
     glEnable GL_BLEND
     glBlendFunc GL_SRC_ALPHA GL_ONE
     --glBlendFunc GL_ONE GL_ONE
-    glBindTextureUnit 0 (_unTO . snd $ _fboHalf1 pdata)
+    glBindTextureUnit 0 (_unTO . snd $ _fboQuarter pdata)
     glUseProgram (pdata ^. fullscreenShader)
     --glDrawArrays GL_TRIANGLES 0 6
     glDrawArrays GL_TRIANGLES 0 3

src/Framebuffer/Update.hs

@@ -66,7 +66,6 @@ sizeFBOs cfig rdata =
                     GL_LINEAR_MIPMAP_LINEAR
                     GL_LINEAR
                     GL_RGBA16F
-                    --                [fboBloom] -- fboPos probably doesn't need the alpha channel
                 )
             >>= fboPos
                 ( resizeFBOTO
@@ -75,12 +74,26 @@ sizeFBOs cfig rdata =
                     GL_NEAREST
                     GL_RGBA16F -- possibly doesn't need the alpha channel...
                 )
+            >>= fboHalf
+                ( resizeFBOTO'
+                    (getWindowSize (const EighthRes) cfig)
+                    5
+                    GL_LINEAR_MIPMAP_LINEAR
+                    GL_LINEAR
+                    GL_RGBA16F
+                )
+--            >>= foldUpdateFBOTO
+--                _gr_downsize_res
+--                GL_LINEAR_MIPMAP_LINEAR
+--                GL_LINEAR
+--                GL_RGBA16F
+--                [fboHalf]
             >>= foldUpdateFBOTO
-                _gr_downsize_res
+                (const SixteenthRes)
                 GL_LINEAR_MIPMAP_LINEAR
                 GL_LINEAR
                 GL_RGBA16F
-                [fboHalf1, fboHalf2]
+                [fboQuarter]
             >>= fboWindow
                 ( resizeFBOTO2
                     (getWindowSize _gr_world_res cfig)

src/Preload/Render.hs

@@ -179,8 +179,8 @@ preloadRender = do
     fboLightingName <- setupFramebufferGivenStencil rboBaseBloomName
 
     fbofullscreen <- newTextureFramebuffer
-    fboHalf1Name <- newTextureFramebuffer
-    fboHalf2Name <- newTextureFramebuffer
+    fbohalf <- newTextureFramebuffer
+    fboquarter <- newTextureFramebuffer
 
     -- reset to default framebuffer, ready for drawing direct to screen
     glBindFramebuffer GL_FRAMEBUFFER 0
@@ -208,8 +208,8 @@ preloadRender = do
             , _barrelShader = (barrelShad,distvbo)
 --            , _fbo2 = framebuf2
             , _fboFullscreen = fbofullscreen
-            , _fboHalf1 = fboHalf1Name
-            , _fboHalf2 = fboHalf2Name
+            , _fboHalf = fbohalf
+            , _fboQuarter = fboquarter
             , _fboLighting = fboLightingName
             , _fboBase = fboBaseName
             , _fboWindow = fbowindow