Struct RenderDtypeSupport 

pub struct RenderDtypeSupport {
    pub f32: bool,
    pub f16: bool,
}

Reports which float-color-buffer extensions the GPU backend detected. Returned by ImageProcessor::supported_render_dtypes; the two flags are independent.

Linux: reflects the real probe results from GL_EXT_color_buffer_half_float and GL_EXT_color_buffer_float. On V3D (RPi 5) and Mali-G310 (i.MX 95) both flags are typically true; on Vivante GC7000UL both are forced false (float readback measured 170–320 ms — disabled). Tegra Orin exposes both via PBO; the flags match the GPU report.

macOS (ANGLE): f16 == true gates the RGBA16F-packed IOSurface path for F16 PlanarRgb destinations. f32 reflects the GL extension probe but is not actionable — ANGLE’s EGL_ANGLE_iosurface_client_buffer rejects every (GL_FLOAT, *) combination with EGL_BAD_ATTRIBUTE, so there is no F32 IOSurface path.

Regardless of these flags, ImageProcessor::convert never returns an error due to float capability — it falls back to CPU when the GPU path is unavailable.

Fields

f32: bool

GL_EXT_color_buffer_float is available on the current GPU.

On Linux, true enables F32 Rgb NHWC PBO readback. On macOS this flag is informational only — no F32 IOSurface path exists.

f16: bool

GL_EXT_color_buffer_half_float is available on the current GPU.

On Linux, true enables F16 PlanarRgb NCHW PBO readback and, on V3D/Mali, zero-copy DMA-BUF render. On macOS, true enables F16 PlanarRgb via RGBA16F-packed IOSurface (zero-copy).

Trait Implementations

impl Clone for RenderDtypeSupport

fn clone(&self) -> RenderDtypeSupport

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for RenderDtypeSupport

impl Debug for RenderDtypeSupport

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RenderDtypeSupport

fn default() -> RenderDtypeSupport

Returns the “default value” for a type.

impl Eq for RenderDtypeSupport

impl PartialEq for RenderDtypeSupport

fn eq(&self, other: &RenderDtypeSupport) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for RenderDtypeSupport