Transformations

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

enum NvMediaTransform

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 3045 of file nvmedia_common.h.