Add ability to change quality of BPTC encoder.

CLTool/src/clunix.cpp

@@ -41,7 +41,7 @@ int main(int argc, char **argv) {
     if(strcmp(argv[fileArg], "-q") == 0) {
       fileArg++;
       
-      if(fileArg == argc || (quality = atoi(argv[fileArg])) < 1) {
+      if(fileArg == argc || (quality = atoi(argv[fileArg])) < 0) {
 	PrintUsage();
 	exit(1);
       }
@@ -62,6 +62,7 @@ int main(int argc, char **argv) {
   SCompressionSettings settings;
   settings.bUseSIMD = bUseSIMD;
   settings.iNumThreads = numThreads;
+  settings.iQuality = quality;
 
   CompressedImage *ci = CompressImage(file, settings);
 

Core/include/TexComp.h

@@ -9,6 +9,7 @@ struct SCompressionSettings {
   ECompressionFormat format; 
   bool bUseSIMD;
   int iNumThreads;
+  int iQuality;
 };
 
 extern CompressedImage * CompressImage(

Core/src/TexComp.cpp

@@ -5,16 +5,35 @@
 #include <stdlib.h>
 #include <stdio.h>
 
+template <typename T>
+static T min(const T &a, const T &b) {
+  return (a < b)? a : b;
+}
+
+template <typename T>
+static T max(const T &a, const T &b) {
+  return (a > b)? a : b;
+}
+
+template <typename T>
+static void clamp(T &x, const T &minX, const T &maxX) {
+  x = max(min(maxX, x), minX);
+}
+
 SCompressionSettings:: SCompressionSettings()
   : format(eCompressionFormat_BPTC)
   , bUseSIMD(false)
   , iNumThreads(1)
-{}
+  , iQuality(50)
+{
+  clamp(iQuality, 0, 256);
+}
 
 static CompressionFunc ChooseFuncFromSettings(const SCompressionSettings &s) {
   switch(s.format) {
     case eCompressionFormat_BPTC:
     {
+      BC7C::SetQualityLevel(s.iQuality);
       if(s.bUseSIMD) {
 	return BC7C::CompressImageBC7SIMD;
       }