* Added hability to save jpeg using modular codec

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@3081 92316355-f0b4-4df1-b90c-862c8a59935f

pipi/codec.c

@@ -38,7 +38,7 @@ pipi_image_t *pipi_load(char const *name)
     if(!ret)
         ret = pipi_load_oric(name);
 
-#if USE_LIBJPEG
+#if USE_MODULAR
     if(!ret)
         ret = pipi_load_modular(name);
 #endif
@@ -90,6 +90,10 @@ int pipi_save(pipi_image_t *img, const char *name)
     if(ret < 0)
         ret = pipi_save_oric(img, name);
 
+#if USE_MODULAR
+    if(ret < 0)
+        ret = pipi_save_modular(img, name);
+#endif
 #if USE_IMLIB2
     if(ret < 0)
         ret = pipi_save_imlib2(img, name);

pipi/codec/modular/jpeg.c

@@ -119,11 +119,79 @@ end:
 
 int pipi_save_jpeg(pipi_image_t *img, const char *name)
 {
-    return 0;
+    int quality = 75; /* FIXME */
+
+    struct jpeg_compress_struct cinfo;
+    struct jpeg_error_mgr jerr;
+    unsigned char *data = NULL;
+    unsigned char *line = NULL;
+
+    pipi_pixels_t *pixels = pipi_getpixels(img, PIPI_PIXELS_RGBA_C);
+
+    if (!pixels)
+        return 0;
+
+    data = pixels->pixels;
+
+
+    line = malloc(img->w * 3 * sizeof(unsigned char));
+    if (!line)
+        return 0;
+
+    FILE *fp = fopen(name, "wb");
+    if (!fp) {
+        free(line);
+        return 0;
+    }
+
+    jerr.error_exit = error_msg;
+    jerr.emit_message = emit_msg;
+    jerr.output_message = output_msg;
+
+    cinfo.err = jpeg_std_error(&(jerr));
+
+    jpeg_create_compress(&cinfo);
+    jpeg_stdio_dest(&cinfo, fp);
+    cinfo.image_width = img->w;
+    cinfo.image_height = img->h;
+    cinfo.input_components = 3;
+    cinfo.in_color_space = JCS_RGB;
+
+    jpeg_set_defaults(&cinfo);
+    jpeg_set_quality(&cinfo, quality, TRUE);
+    jpeg_start_compress(&cinfo, TRUE);
+
+    int j, i, y = 0;
+    uint32_t *ptr = (uint32_t*)data;
+    JSAMPROW           *jbuf;
+
+    while (cinfo.next_scanline < cinfo.image_height)
+    {
+        for (j = 0, i = 0; i < img->w; i++)
+        {
+            line[j++] = ((*ptr) >> 16) & 0xff;
+            line[j++] = ((*ptr) >> 8) & 0xff;
+            line[j++] = ((*ptr)) & 0xff;
+            ptr++;
+        }
+        /* write scanline */
+        jbuf = (JSAMPROW *) (&line);
+        jpeg_write_scanlines(&cinfo, jbuf, 1);
+        y++;
+    }
+
+    jpeg_finish_compress(&cinfo);
+    jpeg_destroy_compress(&cinfo);
+    free(line);
+    fclose(fp);
+
+    return 1;
 }
 
 static int pipi_free_jpeg(pipi_image_t *img)
 {
+    if(img->p[PIPI_PIXELS_RGBA_C].pixels)
+        free(img->p[PIPI_PIXELS_RGBA_C].pixels);
     return 0;
 }