69 lines
6.2 KiB
Plaintext
69 lines
6.2 KiB
Plaintext
~~Title: Evas Programming Guide~~
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{{page>index}}
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===== Evas Programming Guide =====
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Evas is a clean display canvas API for several target display systems that can
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draw anti-aliased text, smooth super and sub-sampled scaled images,
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alpha-blend objects and much more.
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It abstracts any need to know much about what the characteristics of your
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display system are, what graphics calls are used to draw them, and how. It
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deals on an object level where all you do is create and manipulate objects in
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a canvas and set their properties.
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Evas optimizes the rendering pipeline to minimize effort in redrawing changes
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made to the canvas and so takes this work out of the programmers hand, saving
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a lot of time and energy.
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It is designed to work on embedded systems all the way to large and powerful
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multi-cpu workstations. It can be compiled to only have the features you need
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for your target platform if you so wish. It has several display back-ends,
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allowing it display on several display systems, making it portable for
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cross-device and cross-platform development.
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Evas is not a widget set or a widget toolkit, but it is their base. See
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Elementary for a toolkit based on Evas, Edje, Ecore and other Enlightenment
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technologies.
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It is not dependent or aware of main loops, input or output systems. Input
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must be polled from various sources and fed to Evas. It does not create
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windows or report windows updates to your system, but draws the pixels and
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reports to the user the areas that are changed. These operations are ready to
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be used in Ecore, particularly in Ecore_Evas wrapper/helper set of functions.
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=== Table of Contents ===
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* [[/program_guide/evas/rendering_concept_and_method_in_evas|Rendering Concept and Method in Evas]]
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* [[/program_guide/evas/evas_object|Evas Object]]
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* [[program_guide/evas/evas_object#Primitive_Renderable_Objects|Primitive Renderable Objects]]
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* [[program_guide/evas/evas_object#Rectangle|Rectangle]] ([[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/group__Evas__Object__Rectangle.html|API]]).
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* [[program_guide/evas/evas_object#Text|Text]] ([[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/group__Evas__Object__Text.html| API]]).
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* [[/program_guide/evas/textblock_objects|Textblock]] ([[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/group__Evas__Object__Textblock.html|API]])
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* [[/program_guide/evas/image_objects|Image]] ([[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/group__Evas__Object__Image.html|API]])
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* [[program_guide/evas/evas_object#Primitive_Smart_Objects|Primitive Smart Objects]] ([[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/group__Evas__Smart__Object__Group.html|API]])
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* [[program_guide/evas/evas_object#Primitive_Container_Objects|Primitive Container Objects]]
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* [[program_guide/evas/evas_object#Table|Table]] ([[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/group__Evas__Object__Table.html|API]])
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* [[program_guide/evas/evas_object#Grid|Grid]] ([[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/group__Evas__Object__Grid.html|API]])
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* [[program_guide/evas/evas_object#Box|Box]] ([[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/group__Evas__Object__Box.html|API]])
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* [[/program_guide/evas/clipping_objects|Clipping Objects]]
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* [[/program_guide/evas/mapping_objects|Mapping Objects]]
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* [[/program_guide/evas/evas_engines_concept|Evas Engines Concept]]
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* [[/program_guide/evas/ui_rendering_mode|UI Rendering Mode]]
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=== Related Info ===
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* [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/evas_main.html|Evas API]]
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* [[/program_guide/event_effect/evas_smart_events|Evas Smart Object Events PG]]
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* [[/program_guide/event_effect/evas_object_events|Evas Object Events PG]]
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* [[/program_guide/event_effect/evas_events|Evas Events PG]]
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* [[/program_guide/event_effect/evas_map_animations|Evas Map Effects PG]]
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\\
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^ Evas Examples ^^^^^^
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| [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Buffer_Simple.html|Simple Evas canvas]] | [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Init_Shutdown.html|Evas' init/shutdown routines]] | [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Text.html|Evas text object]] | [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Images.html|Some image object functions]] | [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Images_2.html|Some more image object functions]] | [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Events.html|Evas events (canvas and object ones) and some canvas operations]] |
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| [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Object_Manipulation.html|Evas objects basic manipulation]] | [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Aspect_Hints.html|Evas aspect hints example]] | [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Size_Hints.html|Evas alignment, minimum size, maximum size, padding and weight hints]] | [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Stacking.html|Evas object stacking functions (and some event handling)]] | [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Smart_Objects.html|Evas object smart objects]] | [[https://build.enlightenment.org/job/nightly_efl_gcc_x86_64/lastSuccessfulBuild/artifact/doc/html/Example_Evas_Box.html|Evas box]] |
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\\
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----
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{{page>index}}
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