NVIDIA DRIVE OS Linux API Reference

5.1.3.0 Release

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Detailed Description

Transformations are used to rotate and mirror the source surface of a blit operation.

The destination rectangle is not affected by any transformation settings.

NvMediaTransform identifies the transformations that can be applied as a combination of rotation and mirroring

Specifically, given a hypothetical 2x2 image, applying these operations would yield the following results

INPUT OUTPUT
+---+---+ +---+---+
| 0 | 1 | IDENTITY | 0 | 1 |
+---+---+ ---------------> +---+---+
| 2 | 3 | | 2 | 3 |
+---+---+ +---+---+
+---+---+ +---+---+
| 0 | 1 | ROTATE_90 | 1 | 3 |
+---+---+ ---------------> +---+---+
| 2 | 3 | | 0 | 2 |
+---+---+ +---+---+
+---+---+ +---+---+
| 0 | 1 | ROTATE_180 | 3 | 2 |
+---+---+ ---------------> +---+---+
| 2 | 3 | | 1 | 0 |
+---+---+ +---+---+
+---+---+ +---+---+
| 0 | 1 | ROTATE_270 | 2 | 0 |
+---+---+ ---------------> +---+---+
| 2 | 3 | | 3 | 1 |
+---+---+ +---+---+
+---+---+ +---+---+
| 0 | 1 | FLIP_HORIZONTAL | 1 | 0 |
+---+---+ ---------------> +---+---+
| 2 | 3 | | 3 | 2 |
+---+---+ +---+---+
+---+---+ +---+---+
| 0 | 1 | INVTRANSPOSE | 3 | 1 |
+---+---+ ---------------> +---+---+
| 2 | 3 | | 2 | 0 |
+---+---+ +---+---+
+---+---+ +---+---+
| 0 | 1 | FLIP_VERTICAL | 2 | 3 |
+---+---+ ---------------> +---+---+
| 2 | 3 | | 0 | 1 |
+---+---+ +---+---+
+---+---+ +---+---+
| 0 | 1 | TRANSPOSE | 0 | 2 |
+---+---+ ---------------> +---+---+
| 2 | 3 | | 1 | 3 |
+---+---+ +---+---+

Enumerations

enum  NvMediaTransform {
  NVMEDIA_TRANSFORM_NONE = 0x0,
  NVMEDIA_TRANSFORM_ROTATE_90,
  NVMEDIA_TRANSFORM_ROTATE_180,
  NVMEDIA_TRANSFORM_ROTATE_270,
  NVMEDIA_TRANSFORM_FLIP_HORIZONTAL,
  NVMEDIA_TRANSFORM_INV_TRANSPOSE,
  NVMEDIA_TRANSFORM_FLIP_VERTICAL,
  NVMEDIA_TRANSFORM_TRANSPOSE
}
 Transformations. More...
 

Enumeration Type Documentation

Transformations.

Enumerator
NVMEDIA_TRANSFORM_NONE 

No transformation.

NVMEDIA_TRANSFORM_ROTATE_90 

Rotation by 90 degrees.

NVMEDIA_TRANSFORM_ROTATE_180 

Rotation by 180 degrees.

NVMEDIA_TRANSFORM_ROTATE_270 

Rotation by 270 degrees.

NVMEDIA_TRANSFORM_FLIP_HORIZONTAL 

Mirroring in the horizontal.

NVMEDIA_TRANSFORM_INV_TRANSPOSE 

Mirroring along a diagonal axis from the top right to the bottom left of the rectangular region.

NVMEDIA_TRANSFORM_FLIP_VERTICAL 

Mirroring in the vertical direction.

NVMEDIA_TRANSFORM_TRANSPOSE 

Mirroring along a diagonal axis from the top left to the bottom right of the rectangular region.

Definition at line 3057 of file nvmedia_common.h.