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 }
	2D rotation/transform. More...

Enumeration Type Documentation

NvMediaTransform

enum NvMediaTransform

2D rotation/transform.

This enum describes the 2D transform to apply during a blit operation.

Enumerator
NVMEDIA_TRANSFORM_NONE	No transform.
NVMEDIA_TRANSFORM_ROTATE_90	Rotate 90 degrees anti-clockwise.
NVMEDIA_TRANSFORM_ROTATE_180	Rotate 180 degrees.
NVMEDIA_TRANSFORM_ROTATE_270	Rotate 270 degrees anti-clockwise.
NVMEDIA_TRANSFORM_FLIP_HORIZONTAL	Flip horizontally (mirror along Y axis).
NVMEDIA_TRANSFORM_INV_TRANSPOSE	Apply inverse transpose (mirror along diagonal axis from top-right to bottom-left).
NVMEDIA_TRANSFORM_FLIP_VERTICAL	Flip vertically (mirror along X axis).
NVMEDIA_TRANSFORM_TRANSPOSE	Apply transpose (mirror along diagonal axis from top-left to bottom-right).

Definition at line 151 of file multimedia/tvmr/include/nvmedia_2d.h.