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-rw-r--r--src/render.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/src/render.c b/src/render.c
index 7c66f67c..e0189b0a 100644
--- a/src/render.c
+++ b/src/render.c
@@ -17,6 +17,7 @@
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <math.h>
#include <stdint.h>
+#include <png.h>
#include "hdf5-file.h"
#include "render.h"
@@ -325,3 +326,112 @@ GdkPixbuf *render_get_colour_scale(size_t w, size_t h, int monochrome)
return gdk_pixbuf_new_from_data(data, GDK_COLORSPACE_RGB, FALSE, 8,
w, h, w*3, render_free_data, NULL);
}
+
+
+int render_png(DisplayWindow *dw, const char *filename)
+{
+ FILE *fh;
+ png_structp png_ptr;
+ png_infop info_ptr;
+ png_bytep *row_pointers;
+ int x, y;
+ float *hdr;
+ float max;
+ int w, h;
+
+ w = dw->width;
+ h = dw->height;
+
+ hdr = render_get_image_binned(dw, dw->binning, &max);
+ if ( hdr == NULL ) return 1;
+
+ fh = fopen(filename, "wb");
+ if ( !fh ) {
+ ERROR("Couldn't open output file.\n");
+ return 1;
+ }
+ png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,
+ NULL, NULL, NULL);
+ if ( !png_ptr ) {
+ ERROR("Couldn't create PNG write structure.\n");
+ fclose(fh);
+ return 1;
+ }
+ info_ptr = png_create_info_struct(png_ptr);
+ if ( !info_ptr ) {
+ png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
+ ERROR("Couldn't create PNG info structure.\n");
+ fclose(fh);
+ return 1;
+ }
+ if ( setjmp(png_jmpbuf(png_ptr)) ) {
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ fclose(fh);
+ ERROR( "PNG write failed.\n");
+ return 1;
+ }
+ png_init_io(png_ptr, fh);
+
+ png_set_IHDR(png_ptr, info_ptr, w, h, 8,
+ PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
+ PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
+
+ row_pointers = malloc(h*sizeof(png_bytep *));
+
+ /* Write the image data */
+ max /= dw->boostint;
+ if ( max <= 6 ) { max = 10; }
+
+ for ( y=0; y<h; y++ ) {
+
+ row_pointers[y] = malloc(w*3);
+
+ for ( x=0; x<w; x++ ) {
+
+ int r, g, b;
+ float val;
+
+ val = hdr[x+w*y];
+
+ RENDER_RGB
+
+ row_pointers[y][3*x] = (png_byte)r;
+ row_pointers[y][3*x+1] = (png_byte)g;
+ row_pointers[y][3*x+2] = (png_byte)b;
+
+ }
+ }
+
+ for ( y=0; y<h/2+1; y++ ) {
+ png_bytep scratch;
+ scratch = row_pointers[y];
+ row_pointers[y] = row_pointers[h-y-1];
+ row_pointers[h-y-1] = scratch;
+ }
+
+ png_set_rows(png_ptr, info_ptr, row_pointers);
+ png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
+
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ for ( y=0; y<h; y++ ) {
+ free(row_pointers[y]);
+ }
+ free(row_pointers);
+ fclose(fh);
+
+ free(hdr);
+
+ return 0;
+}
+
+
+int render_tiff_fp(DisplayWindow *dw, const char *filename)
+{
+ return 1;
+}
+
+
+int render_tiff_int16(DisplayWindow *dw, const char *filename)
+{
+ return 1;
+}