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 |
+---+---+ +---+---+
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 3042 of file nvmedia_common.h.