~~Title: Ector.Buffer.Flag~~

===== Description =====

%%Buffer capabilities%%

{{page>:develop:api-include:ector:buffer:flag:description&nouser&nolink&nodate}}

===== Fields =====

{{page>:develop:api-include:ector:buffer:flag:fields&nouser&nolink&nodate}}

  * **none** - %%Buffer may not have any backing, indicates an invalid buffer.%%
  * **cpu_readable** - %%Can be read from the CPU after map. Reading may still be very slow.%%
  * **cpu_writable** - %%Can be written to by the CPU after map. Writing may still be very slow.%%
  * **renderable** - %%Can be rendered to, ie CPU memory for SW rendering, or an FBO for GL engine.%%
  * **drawable** - %%Can be used as a source of pixels to draw on Evas.%%
  * **cpu_readable_fast** - %%Can be read by the CPU at high speed, ie no need for glReadPixels.%%
  * **cpu_writable_fast** - %%Can be written by the CPU at high speed, ie no need for GPU texture upload.%%
  * **uncached** - %%Backed by uncached memory, ie. slow-ish reads but faster than glReadPixels.%%

===== Signature =====

<code>
enum Ector.Buffer.Flag {
    none: 0,
    cpu_readable: 1,
    cpu_writable: 2,
    renderable: 4,
    drawable: 8,
    cpu_readable_fast: 16,
    cpu_writable_fast: 32,
    uncached: 64
}
</code>

===== C signature =====

<code c>
typedef enum {
    ECTOR_BUFFER_FLAG_NONE = 0,
    ECTOR_BUFFER_FLAG_CPU_READABLE = 1,
    ECTOR_BUFFER_FLAG_CPU_WRITABLE = 2,
    ECTOR_BUFFER_FLAG_RENDERABLE = 4,
    ECTOR_BUFFER_FLAG_DRAWABLE = 8,
    ECTOR_BUFFER_FLAG_CPU_READABLE_FAST = 16,
    ECTOR_BUFFER_FLAG_CPU_WRITABLE_FAST = 32,
    ECTOR_BUFFER_FLAG_UNCACHED = 64
} Ector_Buffer_Flag;
</code>