From dd7595a3475407a7fa96a97393bae8c5220e8762 Mon Sep 17 00:00:00 2001
From: David Walter Seikel
Date: Wed, 4 Jan 2012 18:41:13 +1000
Subject: Add the base Enlightenment Foundation Libraries - eina, eet, evas,
 ecore, embryo, and edje.

Note that embryo wont be used, but I'm not sure yet if you can build edje without it.
---
 .../src/modules/savers/jpeg/evas_image_save_jpeg.c | 156 +++++++++++++++++++++
 1 file changed, 156 insertions(+)
 create mode 100644 libraries/evas/src/modules/savers/jpeg/evas_image_save_jpeg.c

(limited to 'libraries/evas/src/modules/savers/jpeg/evas_image_save_jpeg.c')

diff --git a/libraries/evas/src/modules/savers/jpeg/evas_image_save_jpeg.c b/libraries/evas/src/modules/savers/jpeg/evas_image_save_jpeg.c
new file mode 100644
index 0000000..247f0af
--- /dev/null
+++ b/libraries/evas/src/modules/savers/jpeg/evas_image_save_jpeg.c
@@ -0,0 +1,156 @@
+#include "evas_common.h"
+#include "evas_private.h"
+
+#include <stdio.h>
+#include <jpeglib.h>
+#include <setjmp.h>
+
+static int evas_image_save_file_jpeg(RGBA_Image *im, const char *file, const char *key, int quality, int compress);
+
+static Evas_Image_Save_Func evas_image_save_jpeg_func =
+{
+   evas_image_save_file_jpeg
+};
+
+struct _JPEG_error_mgr
+{
+   struct     jpeg_error_mgr pub;
+   jmp_buf    setjmp_buffer;
+};
+typedef struct _JPEG_error_mgr *emptr;
+
+static void _JPEGFatalErrorHandler(j_common_ptr cinfo);
+static void
+_JPEGFatalErrorHandler(j_common_ptr cinfo)
+{
+   emptr errmgr;
+
+   errmgr = (emptr) cinfo->err;
+   longjmp(errmgr->setjmp_buffer, 1);
+   return;
+}
+
+static void
+_JPEGErrorHandler(j_common_ptr cinfo __UNUSED__)
+{
+/*    emptr errmgr; */
+
+/*    errmgr = (emptr) cinfo->err; */
+   return;
+}
+
+static void
+_JPEGErrorHandler2(j_common_ptr cinfo __UNUSED__, int msg_level __UNUSED__)
+{
+/*    emptr errmgr; */
+
+/*    errmgr = (emptr) cinfo->err; */
+   return;
+}
+
+static int
+save_image_jpeg(RGBA_Image *im, const char *file, int quality)
+{
+   struct _JPEG_error_mgr jerr;
+   struct jpeg_compress_struct cinfo;
+   FILE               *f;
+   DATA8              *buf;
+   DATA32             *ptr;
+   JSAMPROW           *jbuf;
+   int                 y = 0;
+
+   if (!im || !im->image.data || !file)
+      return 0;
+
+   buf = alloca(im->cache_entry.w * 3 * sizeof(DATA8));
+   f = fopen(file, "wb");
+   if (!f)
+     {
+	return 0;
+     }
+   jerr.pub.error_exit = _JPEGFatalErrorHandler;
+   jerr.pub.emit_message = _JPEGErrorHandler2;
+   jerr.pub.output_message = _JPEGErrorHandler;
+   cinfo.err = jpeg_std_error(&(jerr.pub));
+   if (sigsetjmp(jerr.setjmp_buffer, 1))
+     {
+	jpeg_destroy_compress(&cinfo);
+	fclose(f);
+	return 0;
+     }
+   jpeg_create_compress(&cinfo);
+   jpeg_stdio_dest(&cinfo, f);
+   cinfo.image_width = im->cache_entry.w;
+   cinfo.image_height = im->cache_entry.h;
+   cinfo.input_components = 3;
+   cinfo.in_color_space = JCS_RGB;
+   cinfo.optimize_coding = FALSE;
+   cinfo.dct_method = JDCT_ISLOW; // JDCT_FLOAT JDCT_IFAST(quality loss)
+   if (quality < 60) cinfo.dct_method = JDCT_IFAST;
+   jpeg_set_defaults(&cinfo);
+   jpeg_set_quality(&cinfo, quality, TRUE);
+   if (quality >= 90)
+     {
+        cinfo.comp_info[0].h_samp_factor = 1;
+        cinfo.comp_info[0].v_samp_factor = 1;
+        cinfo.comp_info[1].h_samp_factor = 1;
+        cinfo.comp_info[1].v_samp_factor = 1;
+        cinfo.comp_info[2].h_samp_factor = 1;
+        cinfo.comp_info[2].v_samp_factor = 1;
+     }
+   jpeg_start_compress(&cinfo, TRUE);
+   ptr = im->image.data;
+   while (cinfo.next_scanline < cinfo.image_height)
+     {
+	unsigned int i, j;
+	for (j = 0, i = 0; i < im->cache_entry.w; i++)
+	  {
+	     buf[j++] = ((*ptr) >> 16) & 0xff;
+	     buf[j++] = ((*ptr) >> 8) & 0xff;
+	     buf[j++] = ((*ptr)) & 0xff;
+	     ptr++;
+	  }
+	jbuf = (JSAMPROW *) (&buf);
+	jpeg_write_scanlines(&cinfo, jbuf, 1);
+	y++;
+     }
+   jpeg_finish_compress(&cinfo);
+   jpeg_destroy_compress(&cinfo);
+   fclose(f);
+   return 1;
+}
+
+static int evas_image_save_file_jpeg(RGBA_Image *im, const char *file, const char *key __UNUSED__, int quality, int compress __UNUSED__)
+{
+   return save_image_jpeg(im, file, quality);
+}
+
+static int
+module_open(Evas_Module *em)
+{
+   if (!em) return 0;
+   em->functions = (void *)(&evas_image_save_jpeg_func);
+   return 1;
+}
+
+static void
+module_close(Evas_Module *em __UNUSED__)
+{
+}
+
+static Evas_Module_Api evas_modapi =
+{
+   EVAS_MODULE_API_VERSION,
+   "jpeg",
+   "none",
+   {
+     module_open,
+     module_close
+   }
+};
+
+EVAS_MODULE_DEFINE(EVAS_MODULE_TYPE_IMAGE_SAVER, image_saver, jpeg);
+
+#ifndef EVAS_STATIC_BUILD_JPEG
+EVAS_EINA_MODULE_DEFINE(image_saver, jpeg);
+#endif
-- 
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