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authorThomas White <taw@physics.org>2011-02-25 17:23:15 +0100
committerThomas White <taw@physics.org>2012-02-22 15:27:15 +0100
commit0874634448299691ab5891dee45f0bf275dff07c (patch)
tree0f118f70a563ae6984f0d9646ed3f8182c3414b2 /src/render.c
parentff5f60512263afac7059c2748511e4e0244f7940 (diff)
hdfsee: Work on view using geometry
Diffstat (limited to 'src/render.c')
-rw-r--r--src/render.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/src/render.c b/src/render.c
index 231225f2..96fab6d2 100644
--- a/src/render.c
+++ b/src/render.c
@@ -185,6 +185,50 @@ static float *get_binned_image(struct image *image, int binning, float *pmax)
}
+static float *get_binned_panel(struct image *image, int binning,
+ int min_fs, int max_fs, int min_ss, int max_ss)
+{
+ float *data;
+ int x, y;
+ int w, h;
+ int fw;
+ float *in;
+
+ fw = image->width;
+ in = image->data;
+
+ /* Some pixels might get discarded */
+ w = (max_fs - min_fs + 1) / binning;
+ h = (max_ss - min_ss + 1) / binning;
+
+ data = malloc(w*h*sizeof(float));
+
+ for ( x=0; x<w; x++ ) {
+ for ( y=0; y<h; y++ ) {
+
+ double total;
+ size_t xb, yb;
+
+ total = 0;
+ for ( xb=0; xb<binning; xb++ ) {
+ for ( yb=0; yb<binning; yb++ ) {
+
+ double v;
+ v = in[binning*x+xb+min_fs + (binning*y+yb+min_ss)*fw];
+ total += v;
+
+ }
+ }
+
+ data[x+w*y] = total / ((double)binning * (double)binning);
+
+ }
+ }
+
+ return data;
+}
+
+
/* NB This function is shared between render_get_image() and
* render_get_colour_scale() */
static void render_free_data(guchar *data, gpointer p)
@@ -254,6 +298,104 @@ GdkPixbuf *render_get_image(struct image *image, int binning, int scale,
}
+static GdkPixbuf *render_panel(struct image *image,
+ int binning, int scale, double boost,
+ int min_fs, int max_fs, int min_ss, int max_ss)
+{
+ int w, h;
+ guchar *data;
+ float *hdr;
+ int x, y;
+ double max;
+ int pw, ph;
+ int i;
+
+ /* Calculate panel width and height
+ * (add one because min and max are inclusive) */
+ pw = max_fs - min_fs + 1;
+ ph = max_ss - min_ss + 1;
+ w = pw / binning;
+ h = ph / binning;
+
+ /* High dynamic range version */
+ max = 0.0;
+ for ( i=0; i<image->width*image->height; i++ ) {
+ if ( image->data[i] > max ) max = image->data[i];
+ }
+ hdr = get_binned_panel(image, binning, min_fs, max_fs, min_ss, max_ss);
+ if ( hdr == NULL ) return NULL;
+
+ /* Rendered (colourful) version */
+ data = malloc(3*w*h);
+ if ( data == NULL ) {
+ free(hdr);
+ return NULL;
+ }
+
+ max /= boost;
+ if ( max <= 6 ) { max = 10; }
+ /* These x,y coordinates are measured relative to the bottom-left
+ * corner */
+ for ( y=0; y<h; y++ ) {
+ for ( x=0; x<w; x++ ) {
+
+ float val;
+ float r, g, b;
+
+ val = hdr[x+w*y];
+ render_scale(val, max, scale, &r, &g, &b);
+
+ /* Stuff inside square brackets makes this pixel go to
+ * the expected location in the pixbuf (which measures
+ * from the top-left corner */
+ data[3*( x+w*(h-1-y) )+0] = 255*r;
+ data[3*( x+w*(h-1-y) )+1] = 255*g;
+ data[3*( x+w*(h-1-y) )+2] = 255*b;
+
+ }
+ }
+
+ /* Finished with this */
+ free(hdr);
+
+ /* Create the pixbuf from the 8-bit display data */
+ return gdk_pixbuf_new_from_data(data, GDK_COLORSPACE_RGB, FALSE, 8,
+ w, h, w*3, render_free_data, NULL);
+
+}
+
+
+/* Render an image into multiple pixbufs according to geometry */
+GdkPixbuf **render_panels(struct image *image,
+ int binning, int scale, double boost,
+ int *n_pixbufs)
+{
+ int i;
+ int np = image->det->n_panels;
+ GdkPixbuf **pixbufs;
+
+ pixbufs = calloc(np, sizeof(GdkPixbuf*));
+ if ( pixbufs == NULL ) {
+ *n_pixbufs = 0;
+ return NULL;
+ }
+
+ for ( i=0; i<np; i++ ) {
+
+ pixbufs[i] = render_panel(image, binning, scale, boost,
+ image->det->panels[i].min_fs,
+ image->det->panels[i].max_fs,
+ image->det->panels[i].min_ss,
+ image->det->panels[i].max_ss);
+
+ }
+
+ *n_pixbufs = np;
+
+ return pixbufs;
+}
+
+
GdkPixbuf *render_get_colour_scale(size_t w, size_t h, int scale)
{
guchar *data;