BNTX : Add BC4 alpha support

File_Format_Library/GUI/TextureUI/Importers/BNTX/BinaryTextureImporterList.Designer.cs

@@ -52,6 +52,7 @@
             this.dataSizeLbl = new Toolbox.Library.Forms.STLabel();
             this.cnkGammaFix = new Toolbox.Library.Forms.STCheckBox();
             this.chkMultiThreading = new Toolbox.Library.Forms.STCheckBox();
+            this.chkBC4Alpha = new Toolbox.Library.Forms.STCheckBox();
             this.contentContainer.SuspendLayout();
             ((System.ComponentModel.ISupportInitialize)(this.SwizzleNum)).BeginInit();
             ((System.ComponentModel.ISupportInitialize)(this.MipmapNum)).BeginInit();
@@ -60,6 +61,7 @@
             // 
             // contentContainer
             // 
+            this.contentContainer.Controls.Add(this.chkBC4Alpha);
             this.contentContainer.Controls.Add(this.chkMultiThreading);
             this.contentContainer.Controls.Add(this.cnkGammaFix);
             this.contentContainer.Controls.Add(this.dataSizeLbl);
@@ -103,6 +105,7 @@
             this.contentContainer.Controls.SetChildIndex(this.dataSizeLbl, 0);
             this.contentContainer.Controls.SetChildIndex(this.cnkGammaFix, 0);
             this.contentContainer.Controls.SetChildIndex(this.chkMultiThreading, 0);
+            this.contentContainer.Controls.SetChildIndex(this.chkBC4Alpha, 0);
             // 
             // button2
             // 
@@ -316,7 +319,7 @@
             // cnkGammaFix
             // 
             this.cnkGammaFix.AutoSize = true;
-            this.cnkGammaFix.Location = new System.Drawing.Point(757, 345);
+            this.cnkGammaFix.Location = new System.Drawing.Point(754, 345);
             this.cnkGammaFix.Name = "cnkGammaFix";
             this.cnkGammaFix.Size = new System.Drawing.Size(160, 17);
             this.cnkGammaFix.TabIndex = 32;
@@ -335,6 +338,17 @@
             this.chkMultiThreading.UseVisualStyleBackColor = true;
             this.chkMultiThreading.CheckedChanged += new System.EventHandler(this.chkMultiThreading_CheckedChanged);
             // 
+            // chkBC4Alpha
+            // 
+            this.chkBC4Alpha.AutoSize = true;
+            this.chkBC4Alpha.Location = new System.Drawing.Point(754, 368);
+            this.chkBC4Alpha.Name = "chkBC4Alpha";
+            this.chkBC4Alpha.Size = new System.Drawing.Size(76, 17);
+            this.chkBC4Alpha.TabIndex = 34;
+            this.chkBC4Alpha.Text = "BC4 Alpha";
+            this.chkBC4Alpha.UseVisualStyleBackColor = true;
+            this.chkBC4Alpha.CheckedChanged += new System.EventHandler(this.chkBC4Alpha_CheckedChanged);
+            // 
             // BinaryTextureImporterList
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
@@ -377,5 +391,6 @@
         private Toolbox.Library.Forms.STLabel compModeLbl;
         private Toolbox.Library.Forms.STCheckBox cnkGammaFix;
         private Toolbox.Library.Forms.STCheckBox chkMultiThreading;
+        private Toolbox.Library.Forms.STCheckBox chkBC4Alpha;
     }
 }

File_Format_Library/GUI/TextureUI/Importers/BNTX/BinaryTextureImporterList.cs

@@ -53,7 +53,6 @@ namespace FirstPlugin
                 //  if (format != SurfaceFormat.Invalid)
             }
 
-            
             formatComboBox.Items.Add(SurfaceFormat.D32_FLOAT_S8X24_UINT);
             formatComboBox.Items.Add(SurfaceFormat.A1_B5_G5_R5_UNORM);
             formatComboBox.Items.Add(SurfaceFormat.A4_B4_G4_R4_UNORM);
@@ -93,6 +92,7 @@ namespace FirstPlugin
             compressionModeCB.SelectedIndex = 0;
             compressionModeCB.Visible = false;
             compModeLbl.Visible = false;
+            chkBC4Alpha.Enabled = false;
 
             foreach (SurfaceDim dim in (SurfaceDim[])Enum.GetValues(typeof(SurfaceDim)))
             {
@@ -166,6 +166,11 @@ namespace FirstPlugin
                 compModeLbl.Visible = false;
             }
 
+            if (setting.Format == SurfaceFormat.BC4_UNORM || setting.Format == SurfaceFormat.BC4_SNORM)
+                chkBC4Alpha.Enabled = true;
+            else
+                chkBC4Alpha.Enabled = false;
+
             Bitmap bitmap = Toolbox.Library.Imaging.GetLoadingImage();
 
             if (compressionModeCB.SelectedIndex == 0)
@@ -180,7 +185,8 @@ namespace FirstPlugin
 
                 pictureBox1.Image = bitmap;
 
-                var mips = setting.GenerateMipList(CompressionMode, MultiThreading);
+                var mips = setting.GenerateMipList(CompressionMode, MultiThreading, chkBC4Alpha.Checked);
+
                 setting.DataBlockOutput.Clear();
                 setting.DataBlockOutput.Add(Utils.CombineByteArray(mips.ToArray()));
 
@@ -198,6 +204,10 @@ namespace FirstPlugin
                         bitmap = STGenericTexture.DecodeBlockGetBitmap(mips[0],
                         setting.TexWidth, setting.TexHeight, TextureData.ConvertFormat(setting.Format), new byte[0]);
                     }
+
+                    if (chkBC4Alpha.Checked)
+                        bitmap = BitmapExtension.SetChannel(bitmap, STChannelType.Red,
+                            STChannelType.Red, STChannelType.Red, STChannelType.Red);
                 }
 
                 if (pictureBox1.InvokeRequired)
@@ -253,7 +263,6 @@ namespace FirstPlugin
             {
                 SetupSettings(SelectedTexSettings);
             }
-
         }
 
         private void listViewCustom1_SelectedIndexChanged(object sender, EventArgs e)
@@ -341,5 +350,11 @@ namespace FirstPlugin
                 SetupSettings(SelectedTexSettings, false);
             }
         }
+
+        private void chkBC4Alpha_CheckedChanged(object sender, EventArgs e) {
+            if (SelectedTexSettings != null) {
+                SetupSettings(SelectedTexSettings, false);
+            }
+        }
     }
 }

File_Format_Library/GUI/TextureUI/Importers/BNTX/TextureImporterSettings.cs

@@ -159,11 +159,13 @@ namespace FirstPlugin
         }
 
 
-        public List<byte[]> GenerateMipList(STCompressionMode CompressionMode, bool multiThread, int SurfaceLevel = 0)
+        public List<byte[]> GenerateMipList(STCompressionMode CompressionMode, bool multiThread, bool bc4Alpha, int SurfaceLevel = 0)
         {
             Bitmap Image = BitmapExtension.GetBitmap(DecompressedData[SurfaceLevel], (int)TexWidth, (int)TexHeight);
             if (GammaFix)
                 Image = BitmapExtension.AdjustGamma(Image, 2.2f);
+            if (bc4Alpha)
+                Image = BitmapExtension.SetChannel(Image, STChannelType.Alpha, STChannelType.Alpha, STChannelType.Alpha, STChannelType.Alpha);
 
             List<byte[]> mipmaps = new List<byte[]>();
             for (int mipLevel = 0; mipLevel < MipCount; mipLevel++)
@@ -172,7 +174,7 @@ namespace FirstPlugin
                 int MipHeight = Math.Max(1, (int)TexHeight >> mipLevel);
 
                 if (mipLevel != 0)
-                    Image = BitmapExtension.ResizeImage(Image, MipWidth, MipHeight);
+                    Image = BitmapExtension.Resize(Image, MipWidth, MipHeight);
 
                 mipmaps.Add(STGenericTexture.CompressBlock(BitmapExtension.ImageToByte(Image),
                     Image.Width, Image.Height, TextureData.ConvertFormat(Format), alphaRef, multiThread, CompressionMode));