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-rw-r--r--src/JPEGOutputImage.cxx121
1 files changed, 121 insertions, 0 deletions
diff --git a/src/JPEGOutputImage.cxx b/src/JPEGOutputImage.cxx
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+++ b/src/JPEGOutputImage.cxx
@@ -0,0 +1,121 @@
+//
+// Copyright 2006 by Johannes Hofmann
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+// USA.
+//
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+extern "C" {
+#include <jpeglib.h>
+}
+
+#include "JPEGOutputImage.H"
+
+JPEGOutputImage::JPEGOutputImage(const char *f, int q) {
+ file = strdup(f);
+ fp = NULL;
+ row = NULL;
+ quality = q;
+}
+
+JPEGOutputImage::~JPEGOutputImage() {
+ if (row) {
+ free(row);
+ }
+ if (file) {
+ free(file);
+ }
+}
+
+int
+JPEGOutputImage::init_internal(int w1, int h1) {
+ if (row) {
+ free(row);
+ row = NULL;
+ }
+
+ row = (unsigned char*) malloc(sizeof(char) * 3 * W);
+ if (!row) {
+ perror("malloc");
+ return 1;
+ }
+ memset(row, 0, sizeof(char) * 3 * W);
+
+ if (fp) {
+ fclose(fp);
+ }
+
+ if ((fp = fopen(file, "wb")) == NULL) {
+ fprintf(stderr, "can't open %s\n", file);
+ return 1;
+ }
+
+ cinfo.err = jpeg_std_error(&jerr);
+ jpeg_create_compress(&cinfo);
+ jpeg_stdio_dest(&cinfo, fp);
+ cinfo.image_width = W;
+ cinfo.image_height = H;
+ cinfo.input_components = 3; /* # of color components per pixel */
+ cinfo.in_color_space = JCS_RGB;
+
+ jpeg_set_defaults(&cinfo);
+ jpeg_set_quality(&cinfo, quality, TRUE);
+
+ jpeg_start_compress(&cinfo, TRUE);
+
+}
+
+int
+JPEGOutputImage::set_pixel_internal(int x, char r, char g, char b) {
+ row[x*3+0] = r;
+ row[x*3+1] = g;
+ row[x*3+2] = b;
+
+ return 0;
+}
+
+int
+JPEGOutputImage::next_line_internal() {
+ JSAMPROW row_pointer[1];
+
+ row_pointer[0] = row;
+ jpeg_write_scanlines(&cinfo, row_pointer, 1);
+ memset(row, 0, sizeof(char) * 3 * W);
+ return 0;
+}
+
+int
+JPEGOutputImage::done_internal() {
+ jpeg_finish_compress(&cinfo);
+ jpeg_destroy_compress(&cinfo);
+
+ if (fp) {
+ fclose(fp);
+ fp = NULL;
+ }
+ if (row) {
+ free(row);
+ }
+
+ if (fp) {
+ fclose(fp);
+ fp = NULL;
+ }
+ return 0;
+}
+