Graphics Reference
In-Depth Information
__pixel_localEXT FragLocalData
{
highp uint
v0
;
// all of these will use the
highp uint
v1
;
// default r32ui layout .
highp uint
v2
;
}
Storage
;
Listing 3.5.
All variables will use the default
r32ui
storage layout.
layout
(
r32f
)
__pixel_localEXT FragLocalData
{
highp float
v0
;
// all of these will inherit the r32f layout
highp float
v1
;
// from the local storage declaration.
highp float
v2
;
}
Storage
;
Listing 3.6.
All variables will inherit the
r32f
storage layout.
__pixel_localEXT FragLocalData
{
layout
(
r11f_g11f_b10f
)
vec3
v0
;
layout
(
r32ui
)
uint
v1
;
layout
(
rg16
)
vec2
v2
;
vec2
v3
;
// v3 will inherit from the previously
// defined layout qualifier (rg16).
}
Storage
;
Listing 3.7.
Multiple storage layouts used together.
3.3.4 Usage Patterns
There are multiple ways to use this extension.
Pixel local storage.
This example uses the Shader Pixel Local Storage to do all
the rendering.
1. Clear framebuffer to 0.
2. Call
glEnable(GL_SHADER_PIXEL_LOCAL_STORAGE_EXT)
.
3. Do operations on the pixel local storage by rendering geometry, etc.
4. Resolve from pixel local storage to one or more user-defined fragment shader
outputs.
5. Call
glDisable(GL_SHADER_PIXEL_LOCAL_STORAGE_EXT)
.
6. Call
eglSwapbuffer
.
