Differences

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--- merkalt:label_image_render [2012/11/07 19:27] – created dmitriy
+++ merkalt:label_image_render [2013/05/21 17:53] (current) – [Background actions for rendering] ramil
@@ Line 1: / Line 1: @@
+Render label requests are coming from the next sources
+  - Customer rendering of preview (saved in temporary file as it is impossible to identify customer berofe order issued. Temporary files are cleared by system)
+  - When order is processed, customer and webmaster emails image attachements are used. Additionally each order label could be retrieved as URL with a special unique label marker
+==== Background actions for rendering ====
 Rendering of image is based on 'layers' abstraction. There are several type of layers - some applied to the whole picture, some render small object like text inside container, or image.
-  - color or backgroundColor layers fill either background or all label objects with cerain color
+  - color or backgroundColor layers fill either background or all label objects with certain color
+  - backgroundImage layer sets certain image as background
   - size layer allows to setup canvas size used
   - motif layer allows to setup an image inside the label. Specific top margin could be setup for motif layer
-  - text layers allows to add different text blocks to label. The algorythm includes the such steps as: definition of font type, setting up an initial free area of the text container
+  - text layers allows to add different text blocks to label. The algorythm includes the such steps as:
+      - definition of font type
+      - setting up an initial free area of the text container
+      - definition of font size to be used (based on available free space)
+      - re-calculation of text container sizes (if there are several lines)
+      - definition of horizontal offset for the certain block (if there are several lines)
+      - setup correct vertical gaps (if there are several lines)