JPEG screenshots

1 files changed, 89 insertions, 0 deletions

diff --git a/src/render/jpgfile.cc b/src/render/jpgfile.cc
new file mode 100644
index 0000000..74cdea9
--- /dev/null
+++ b/src/render/jpgfile.cc
@@ -0,0 +1,89 @@
+/*
+   render/jpgfile.cc
+   This file is part of the Osirion project and is distributed under
+   the terms of the GNU General Public License version 2
+*/
+
+/*
+Notes:
+
+http://www.zarb.org/~gc/html/libpng.html
+
+*/
+
+#include <cstring>
+#include <iostream>
+
+#include "filesystem/filesystem.h"
+#include "render/jpgfile.h"
+#include "sys/sys.h"
+
+extern "C" {
+	#include "jpeglib.h"
+}
+
+namespace render {
+
+Image *JPG::load(const char *filename)
+{
+	Image *image = 0;
+
+	if (!filename)
+		return 0;
+
+	filesystem::File *jpg_file = filesystem::open(filename);
+	if (!jpg_file) {
+		//con_warn << "Could not open " << filename << std::endl;
+		return 0;
+	}
+
+
+        filesystem::close(jpg_file);
+
+//	con_debug << "  " << filename << " " << png_width << "x" << png_height << "x" << channels * png_depth << "bpp" << std::endl;
+
+	return image;
+}
+
+void JPG::save(const char *filename, Image & image, int jpeg_quality)
+{
+	struct jpeg_compress_struct jpeg_compression_info;
+	struct jpeg_error_mgr jerr;
+
+	JSAMPROW row_pointer[1];
+	int row_stride;
+
+        FILE *jpg_file = fopen(filename, "wb");
+        if (!jpg_file) {
+     		con_warn << "Could not write " << filename << std::endl;
+                return;
+	}
+
+	jpeg_compression_info.err = jpeg_std_error(&jerr);
+	jpeg_create_compress(&jpeg_compression_info);
+	jpeg_stdio_dest(&jpeg_compression_info, jpg_file);
+
+	jpeg_compression_info.image_width = image.width();
+	jpeg_compression_info.image_height = image.height();
+	jpeg_compression_info.input_components = image.channels();
+	jpeg_compression_info.in_color_space = JCS_RGB;
+
+	jpeg_set_defaults(&jpeg_compression_info);
+	jpeg_set_quality(&jpeg_compression_info, jpeg_quality, TRUE);
+	jpeg_start_compress(&jpeg_compression_info, TRUE);
+	row_stride = image.width() * image.channels();
+
+	while (jpeg_compression_info.next_scanline < jpeg_compression_info.image_height) {
+		row_pointer[0] = image[jpeg_compression_info.next_scanline * row_stride];
+		jpeg_write_scanlines(&jpeg_compression_info, row_pointer, 1);
+	}
+
+	jpeg_finish_compress(&jpeg_compression_info);
+	fclose(jpg_file);
+
+	jpeg_destroy_compress(&jpeg_compression_info);
+
+	con_print << "Wrote " << filename << std::endl;
+}
+
+}