[project @ Adding Transparency Filter]

src/Makefile.am

@@ -18,7 +18,7 @@ alphaover.la  darken.la      gamma.la          ising0r.la      overlay.la    sof
 alphaxor.la   delay0r.la                lighten.la      pixeliz0r.la  squareblur.la  contrast0r.la\
 blend.la      difference.la  grain_extract.la  lissajous0r.la  saturat0r.la\
 subtract.la letterb0xed.la R.la G.la B.la RGB.la composition.la alphainjection.la\
-water.la cartoon.la  glow.la
+water.la cartoon.la  glow.la lenscorrection.la transparency.la
 
 if HAVE_GAVL
 plugin_LTLIBRARIES += scale0tilt.la
@@ -32,6 +32,8 @@ facedetect_la_SOURCES = filter/facedetect/facedetect.c
 facedetect_la_CFLAGS = @OPENCV_CFLAGS@ @CFLAGS@ 
 endif
 
+transparency_la_SOURCES = filter/transparency/transparency.c
+lenscorrection_la_SOURCES = filter/lenscorrection/lenscorrection.c
 glow_la_SOURCES = filter/glow/glow.c filter/glow/blur.h
 cartoon_la_SOURCES = filter/cartoon/cartoon.cpp
 water_la_SOURCES = filter/water/water.cpp

src/filter/transparency/transparency.c

@@ -0,0 +1,115 @@
+#include "frei0r.h"
+#include "frei0r_math.h"
+#include <stdlib.h>
+#include <assert.h>
+
+typedef struct transparency_instance
+{
+  unsigned int width;
+  unsigned int height;
+  double transparency;
+} transparency_instance_t;
+
+int f0r_init()
+{
+  return 1;
+}
+
+void f0r_deinit()
+{ /* no initialization required */ }
+
+void f0r_get_plugin_info(f0r_plugin_info_t* transparencyInfo)
+{
+  transparencyInfo->name = "Transparency";
+  transparencyInfo->author = "Richard Spindler";
+  transparencyInfo->plugin_type = F0R_PLUGIN_TYPE_FILTER;
+  transparencyInfo->color_model = F0R_COLOR_MODEL_RGBA8888;
+  transparencyInfo->frei0r_version = FREI0R_MAJOR_VERSION;
+  transparencyInfo->major_version = 0; 
+  transparencyInfo->minor_version = 9; 
+  transparencyInfo->num_params =  1; 
+  transparencyInfo->explanation = "Tunes the alpha channel.";
+}
+
+void f0r_get_param_info(f0r_param_info_t* info, int param_index)
+{
+	switch(param_index)
+	{
+		case 0:
+			info->name = "Transparency";
+			info->type = F0R_PARAM_DOUBLE;
+			info->explanation = "The transparency value";
+			break;
+	}
+}
+
+f0r_instance_t f0r_construct(unsigned int width, unsigned int height)
+{
+  transparency_instance_t* inst = 
+    (transparency_instance_t*)malloc(sizeof(transparency_instance_t));
+  inst->width = width; inst->height = height;
+  inst->transparency = 0.0;
+  return (f0r_instance_t)inst;
+}
+
+void f0r_destruct(f0r_instance_t instance)
+{
+  free(instance);
+}
+
+void f0r_set_param_value(f0r_instance_t instance, 
+			 f0r_param_t param, int param_index)
+{
+	assert(instance);
+	transparency_instance_t* inst = (transparency_instance_t*)instance;
+
+	switch(param_index)
+	{
+		double val;
+		case 0:
+		/* transparency */
+		val = *((double*)param);
+		if (val != inst->transparency)
+		{
+			inst->transparency = val;
+		}
+		break;
+	}
+
+}
+
+void f0r_get_param_value(f0r_instance_t instance,
+			 f0r_param_t param, int param_index)
+{
+	assert(instance);
+	transparency_instance_t* inst = (transparency_instance_t*)instance;
+	switch(param_index)
+	{
+		case 0:
+			*((double*)param) = inst->transparency;
+			break;
+	}
+}
+
+void f0r_update(f0r_instance_t instance, double time,
+		const uint32_t* inframe, uint32_t* outframe)
+{
+  assert(instance);
+  transparency_instance_t* inst = (transparency_instance_t*)instance;
+  unsigned int w = inst->width;
+  unsigned int h = inst->height;
+  unsigned int x,y;
+  
+  uint32_t* dst = outframe;
+  const uint32_t* src = inframe;
+  uint8_t alpha  = (uint8_t)( inst->transparency * 255 );
+  for(y=h;y>0;--y)
+      for(x=w;x>0;--x,++src,++dst)
+	{
+	  uint8_t tmpalpha;
+	  uint8_t* tmpc = (uint8_t*)src;
+	  tmpalpha = MIN(alpha, tmpc[3]);
+	  *dst = (tmpalpha << 24) | (tmpc[2] << 16) | (tmpc[1] << 8) | tmpc[0];
+	}
+}
+