commit 0ca8f64f61b534ba2428236fec2c8879fe58c059
Author: Mattias Andrée <[email protected]>
AuthorDate: Fri Jul 14 16:30:30 2017 +0200
Commit: Mattias Andrée <[email protected]>
CommitDate: Fri Jul 14 16:30:30 2017 +0200
Add
blind-matrix-{orthoproject,reflect,rotate,scale,shear,translate,transpose}
Signed-off-by: Mattias Andrée <[email protected]>
diff --git a/Makefile b/Makefile
index fda6b87..20325cb 100644
--- a/Makefile
+++ b/Makefile
@@ -41,6 +41,13 @@ BIN =\
blind-invert-luma\
blind-linear-gradient\
blind-make-kernel\
+ blind-matrix-orthoproject\
+ blind-matrix-reflect\
+ blind-matrix-rotate\
+ blind-matrix-scale\
+ blind-matrix-shear\
+ blind-matrix-translate\
+ blind-matrix-transpose\
blind-mosaic\
blind-mosaic-edges\
blind-next-frame\
diff --git a/README b/README
index 08b691b..d2a0125 100644
--- a/README
+++ b/README
@@ -117,6 +117,27 @@ UTILITIES
blind-make-kernel(1)
Create a custom convolution matrix
+ blind-matrix-orthoproject(1)
+ Create an affine 2D-transformation matrix for othogonal
projection
+
+ blind-matrix-reflect(1)
+ Create an affine 2D-transformation matrix for reflection about a
line
+
+ blind-matrix-rotate(1)
+ Create an affine 2D-transformation matrix for rotation
+
+ blind-matrix-scale(1)
+ Create an affine 2D-transformation matrix for scaling
+
+ blind-matrix-shear(1)
+ Create an affine 2D-transformation matrix for shearing
+
+ blind-matrix-translate(1)
+ Create an affine 2D-transformation matrix for translation
+
+ blind-matrix-transpose(1)
+ Create an affine 2D-transformation matrix for transposition
+
blind-mosaic(1)
Redraw each frame in video as a mosaic
diff --git a/man/blind-matrix-orthoproject.1 b/man/blind-matrix-orthoproject.1
new file mode 100644
index 0000000..f23e437
--- /dev/null
+++ b/man/blind-matrix-orthoproject.1
@@ -0,0 +1,43 @@
+.TH BLIND-MATRIX-ORTHOPROJECT 1 blind
+.SH NAME
+blind-matrix-orthoproject - Create an affine 2D-transformation matrix for
othogonal projection
+.SH SYNOPSIS
+.B blind-matrix-orthoproject
+[-c]
+.SH DESCRIPTION
+.B blind-matrix-orthoproject
+creates an affine 2D-transformation matrix for
+othogonal projection. The parameters for the
+matrix is read in stdin in format of a blind video,
+one matrix per frame in stdin created and printed
+to stdout in format of a blind video.
+.P
+Each frame in stdin shall contain exactly 2 pixels,
+the first pixel holds the x-value of the vector the
+image is projected along, the second pixel holds the
+y-value of this vector.
+.P
+The luma (encoding in the Y-channel, the second
+channel) multiplied by the alpha (the fourth channel)
+of the input pixels are used as the values. Each
+values in the resulting matrices are stored
+in all channels.
+.SH OPTIONS
+.TP
+.B -c
+Create different matrices for each channel. Use
+values from each channel in stdin to create
+matrices whose values are stored in the same
+channels in stdout.
+.SH SEE ALSO
+.BR blind (7),
+.BR blind-from-text (1),
+.BR blind-matrix-reflect (1),
+.BR blind-matrix-rotate (1),
+.BR blind-matrix-scale (1),
+.BR blind-matrix-shear (1),
+.BR blind-matrix-translate (1),
+.BR blind-matrix-transpose (1)
+.SH AUTHORS
+Mattias Andrée
+.RI < [email protected] >
diff --git a/man/blind-matrix-reflect.1 b/man/blind-matrix-reflect.1
new file mode 100644
index 0000000..6cc294c
--- /dev/null
+++ b/man/blind-matrix-reflect.1
@@ -0,0 +1,43 @@
+.TH BLIND-MATRIX-REFLECT 1 blind
+.SH NAME
+blind-matrix-reflect - Create an affine 2D-transformation matrix for
reflection about a line
+.SH SYNOPSIS
+.B blind-matrix-reflect
+[-c]
+.SH DESCRIPTION
+.B blind-matrix-reflect
+creates an affine 2D-transformation matrix for
+reflection about a line. The parameters for the
+matrix is read in stdin in format of a blind video,
+one matrix per frame in stdin created and printed
+to stdout in format of a blind video.
+.P
+Each frame in stdin shall contain exactly 2 pixels,
+the first pixel holds the x-value of the line going
+out from origo the image is reflected around, the
+second pixel holds the y-value of this line.
+.P
+The luma (encoding in the Y-channel, the second
+channel) multiplied by the alpha (the fourth channel)
+of the input pixels are used as the values. Each
+values in the resulting matrices are stored
+in all channels.
+.SH OPTIONS
+.TP
+.B -c
+Create different matrices for each channel. Use
+values from each channel in stdin to create
+matrices whose values are stored in the same
+channels in stdout.
+.SH SEE ALSO
+.BR blind (7),
+.BR blind-from-text (1),
+.BR blind-matrix-orthoproject (1),
+.BR blind-matrix-rotate (1),
+.BR blind-matrix-scale (1),
+.BR blind-matrix-shear (1),
+.BR blind-matrix-translate (1),
+.BR blind-matrix-transpose (1)
+.SH AUTHORS
+Mattias Andrée
+.RI < [email protected] >
diff --git a/man/blind-matrix-rotate.1 b/man/blind-matrix-rotate.1
new file mode 100644
index 0000000..b97206b
--- /dev/null
+++ b/man/blind-matrix-rotate.1
@@ -0,0 +1,45 @@
+.TH BLIND-MATRIX-ROTATE 1 blind
+.SH NAME
+blind-matrix-rotate - Create an affine 2D-transformation matrix for rotation
+.SH SYNOPSIS
+.B blind-matrix-rotate
+[-c]
+.SH DESCRIPTION
+.B blind-matrix-rotate
+creates an affine 2D-transformation matrix for
+rotation. The parameters for the matrix is read
+in stdin in format of a blind video, one matrix
+per frame in stdin created and printed to stdout
+in format of a blind video.
+.P
+Each frame in stdin shall contain exactly 1 pixel,
+this pixel holds the number of radians the image
+is to be rotated clockwise around origo.
+.P
+The luma (encoding in the Y-channel, the second
+channel) multiplied by the alpha (the fourth channel)
+of the input pixels are used as the values. Each
+values in the resulting matrices are stored
+in all channels.
+.SH OPTIONS
+.TP
+.B -c
+Create different matrices for each channel. Use
+values from each channel in stdin to create
+matrices whose values are stored in the same
+channels in stdout.
+.SH NOTES
+The image is rotated anti-clockwise if the Y-axis
+grows upwards rather than downwards.
+.SH SEE ALSO
+.BR blind (7),
+.BR blind-from-text (1),
+.BR blind-matrix-orthoproject (1),
+.BR blind-matrix-reflect (1),
+.BR blind-matrix-scale (1),
+.BR blind-matrix-shear (1),
+.BR blind-matrix-translate (1),
+.BR blind-matrix-transpose (1)
+.SH AUTHORS
+Mattias Andrée
+.RI < [email protected] >
diff --git a/man/blind-matrix-scale.1 b/man/blind-matrix-scale.1
new file mode 100644
index 0000000..9d35527
--- /dev/null
+++ b/man/blind-matrix-scale.1
@@ -0,0 +1,43 @@
+.TH BLIND-MATRIX-SCALE 1 blind
+.SH NAME
+blind-matrix-scale - Create an affine 2D-transformation matrix for scaling
+.SH SYNOPSIS
+.B blind-matrix-scale
+[-c]
+.SH DESCRIPTION
+.B blind-matrix-scale
+creates an affine 2D-transformation matrix for
+scaling. The parameters for the matrix is read
+in stdin in format of a blind video, one matrix
+per frame in stdin created and printed to stdout
+in format of a blind video.
+.P
+Each frame in stdin shall contain exactly 2 pixel,
+the first pixel holds the scale factor for the
+width and the second pixel holds the scale factor
+for the height.
+.P
+The luma (encoding in the Y-channel, the second
+channel) multiplied by the alpha (the fourth channel)
+of the input pixels are used as the values. Each
+values in the resulting matrices are stored
+in all channels.
+.SH OPTIONS
+.TP
+.B -c
+Create different matrices for each channel. Use
+values from each channel in stdin to create
+matrices whose values are stored in the same
+channels in stdout.
+.SH SEE ALSO
+.BR blind (7),
+.BR blind-from-text (1),
+.BR blind-matrix-orthoproject (1),
+.BR blind-matrix-reflect (1),
+.BR blind-matrix-rotate (1),
+.BR blind-matrix-shear (1),
+.BR blind-matrix-translate (1),
+.BR blind-matrix-transpose (1)
+.SH AUTHORS
+Mattias Andrée
+.RI < [email protected] >
diff --git a/man/blind-matrix-shear.1 b/man/blind-matrix-shear.1
new file mode 100644
index 0000000..1eed202
--- /dev/null
+++ b/man/blind-matrix-shear.1
@@ -0,0 +1,58 @@
+.TH BLIND-MATRIX-SHEAR 1 blind
+.SH NAME
+blind-matrix-shear - Create an affine 2D-transformation matrix for shearing
+.SH SYNOPSIS
+.B blind-matrix-shear
+[-ac]
+.SH DESCRIPTION
+.B blind-matrix-shear
+creates an affine 2D-transformation matrix for
+shearing. The parameters for the matrix is read
+in stdin in format of a blind video, one matrix
+per frame in stdin created and printed to stdout
+in format of a blind video.
+.P
+Each frame in stdin shall contain exactly 2 pixel.
+The first pixel holds the amount the image shall
+be sheared horizontally, that is, how much all
+pixels 1 pixel above the X-axis shall be moved
+rightward. The second pixel holds the amount the
+image shall be sheared vertically, that is, how
+much all pixels 1 pixel right of the Y-axis shall
+be moved downward.
+.P
+The luma (encoding in the Y-channel, the second
+channel) multiplied by the alpha (the fourth channel)
+of the input pixels are used as the values. Each
+values in the resulting matrices are stored
+in all channels.
+.SH OPTIONS
+.TP
+.B -a
+The pixels holds the angles of the shearing rather
+than the amount of the shearing.
+.TP
+.B -c
+Create different matrices for each channel. Use
+values from each channel in stdin to create
+matrices whose values are stored in the same
+channels in stdout.
+.SH NOTES
+The description assumes the Y-axis grows downwards.
+.P
+Horizontal shearing and vertical shearing is not
+mutually commutative, this tool performs the
+shearing at the same time rather than after each
+other.
+.SH SEE ALSO
+.BR blind (7),
+.BR blind-from-text (1),
+.BR blind-matrix-orthoproject (1),
+.BR blind-matrix-reflect (1),
+.BR blind-matrix-rotate (1),
+.BR blind-matrix-scale (1),
+.BR blind-matrix-translate (1),
+.BR blind-matrix-transpose (1)
+.SH AUTHORS
+Mattias Andrée
+.RI < [email protected] >
diff --git a/man/blind-matrix-translate.1 b/man/blind-matrix-translate.1
new file mode 100644
index 0000000..d2b4d00
--- /dev/null
+++ b/man/blind-matrix-translate.1
@@ -0,0 +1,47 @@
+.TH BLIND-MATRIX-TRANSLATE 1 blind
+.SH NAME
+blind-matrix-translate - Create an affine 2D-transformation matrix for
translation
+.SH SYNOPSIS
+.B blind-matrix-translate
+[-c]
+.SH DESCRIPTION
+.B blind-matrix-translate
+creates an affine 2D-transformation matrix for
+translation. The parameters for the matrix is read
+in stdin in format of a blind video, one matrix
+per frame in stdin created and printed to stdout
+in format of a blind video.
+.P
+Each frame in stdin shall contain exactly 2 pixel,
+the first pixel holds the number of pixels the
+image shall be translated rightwards, and the
+second pixel holds the number of pixels the
+image shall be translated downwards.
+.P
+The luma (encoding in the Y-channel, the second
+channel) multiplied by the alpha (the fourth channel)
+of the input pixels are used as the values. Each
+values in the resulting matrices are stored
+in all channels.
+.SH OPTIONS
+.TP
+.B -c
+Create different matrices for each channel. Use
+values from each channel in stdin to create
+matrices whose values are stored in the same
+channels in stdout.
+.SH NOTES
+The image upwards rather than downwards if the
+Y-axis grows upwards rather than downwards.
+.SH SEE ALSO
+.BR blind (7),
+.BR blind-from-text (1),
+.BR blind-matrix-orthoproject (1),
+.BR blind-matrix-reflect (1),
+.BR blind-matrix-rotate (1),
+.BR blind-matrix-scale (1),
+.BR blind-matrix-shear (1),
+.BR blind-matrix-transpose (1)
+.SH AUTHORS
+Mattias Andrée
+.RI < [email protected] >
diff --git a/man/blind-matrix-transpose.1 b/man/blind-matrix-transpose.1
new file mode 100644
index 0000000..c8aafd0
--- /dev/null
+++ b/man/blind-matrix-transpose.1
@@ -0,0 +1,43 @@
+.TH BLIND-MATRIX-TRANSPOSE 1 blind
+.SH NAME
+blind-matrix-transpose - Create an affine 2D-transformation matrix for
transposition
+.SH SYNOPSIS
+.B blind-matrix-transpose
+[-c]
+.SH DESCRIPTION
+.B blind-matrix-transpose
+creates an affine 2D-transformation matrix for
+transposition. The parameters for the matrix is read
+in stdin in format of a blind video, one matrix
+per frame in stdin created and printed to stdout
+in format of a blind video.
+.P
+Each frame in stdin shall contain exactly 1 pixel,
+this pixel holds degree of the transposition, 0
+meaning no transposition at all, 1 meaning full
+transposition.
+.P
+The luma (encoding in the Y-channel, the second
+channel) multiplied by the alpha (the fourth channel)
+of the input pixels are used as the values. Each
+values in the resulting matrices are stored
+in all channels.
+.SH OPTIONS
+.TP
+.B -c
+Create different matrices for each channel. Use
+values from each channel in stdin to create
+matrices whose values are stored in the same
+channels in stdout.
+.SH SEE ALSO
+.BR blind (7),
+.BR blind-from-text (1),
+.BR blind-matrix-orthoproject (1),
+.BR blind-matrix-reflect (1),
+.BR blind-matrix-rotate (1),
+.BR blind-matrix-scale (1),
+.BR blind-matrix-shear (1),
+.BR blind-matrix-translate (1)
+.SH AUTHORS
+Mattias Andrée
+.RI < [email protected] >
diff --git a/man/blind.7 b/man/blind.7
index 7386861..eac666b 100644
--- a/man/blind.7
+++ b/man/blind.7
@@ -133,6 +133,27 @@ Generate a video with a linear gradient
.BR blind-make-kernel (1)
Create a custom convolution matrix
.TP
+.BR blind-matrix-orthoproject (1)
+Create an affine 2D-transformation matrix for othogonal projection
+.TP
+.BR blind-matrix-reflect (1)
+Create an affine 2D-transformation matrix for reflection about a line
+.TP
+.BR blind-matrix-rotate (1)
+Create an affine 2D-transformation matrix for rotation
+.TP
+.BR blind-matrix-scale (1)
+Create an affine 2D-transformation matrix for scaling
+.TP
+.BR blind-matrix-shear (1)
+Create an affine 2D-transformation matrix for shearing
+.TP
+.BR blind-matrix-translate (1)
+Create an affine 2D-transformation matrix for translation
+.TP
+.BR blind-matrix-transpose (1)
+Create an affine 2D-transformation matrix for transposition
+.TP
.BR blind-mosaic (1)
Redraw each frame in video as a mosaic
.TP
diff --git a/src/blind-matrix-orthoproject.c b/src/blind-matrix-orthoproject.c
new file mode 100644
index 0000000..2fe82a2
--- /dev/null
+++ b/src/blind-matrix-orthoproject.c
@@ -0,0 +1,89 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+USAGE("[-c]")
+
+static int per_channel = 0;
+
+#define PROCESS(TYPE)\
+ do {\
+ typedef TYPE pixel_t[4];\
+ pixel_t matrix[9];\
+ pixel_t buf[2];\
+ TYPE x2, y2, norm2;\
+ int i;\
+ \
+ for (i = 0; i < 4; i++) {\
+ matrix[0][i] = 1, matrix[1][i] = 0, matrix[2][i] = 0;\
+ matrix[3][i] = 0, matrix[4][i] = 1, matrix[5][i] = 0;\
+ matrix[6][i] = 0, matrix[7][i] = 0, matrix[8][i] = 1;\
+ }\
+ \
+ while (eread_frame(stream, buf)) {\
+ if (per_channel) {\
+ for (i = 0; i < 4; i++) {\
+ x2 = buf[0][i] * buf[0][i];\
+ y2 = buf[1][i] * buf[1][i];\
+ norm2 = x2 + y2;\
+ matrix[0][i] = x2 / norm2;\
+ matrix[4][i] = y2 / norm2;\
+ matrix[3][i] = matrix[1][i] = buf[0][i]
* buf[1][i] / norm2;\
+ }\
+ } else {\
+ buf[0][1] *= buf[0][3];\
+ buf[1][1] *= buf[1][3];\
+ x2 = buf[0][1] * buf[0][1];\
+ y2 = buf[1][1] * buf[1][1];\
+ norm2 = x2 + y2;\
+ matrix[0][0] = x2 / norm2;\
+ matrix[4][0] = y2 / norm2;\
+ matrix[3][0] = matrix[1][0] = buf[0][1] *
buf[1][1] / norm2;\
+ matrix[0][3] = matrix[0][2] = matrix[0][1] =
matrix[0][0];\
+ matrix[1][3] = matrix[1][2] = matrix[1][1] =
matrix[1][0];\
+ matrix[3][3] = matrix[3][2] = matrix[3][1] =
matrix[3][0];\
+ matrix[4][3] = matrix[4][2] = matrix[4][1] =
matrix[4][0];\
+ }\
+ ewriteall(STDOUT_FILENO, matrix, sizeof(matrix),
"<stdout>");\
+ }\
+ } while (0)
+
+static void process_lf(struct stream *stream) { PROCESS(double); }
+static void process_f(struct stream *stream) { PROCESS(float); }
+
+int
+main(int argc, char *argv[])
+{
+ struct stream stream;
+ void (*process)(struct stream *stream);
+
+ ARGBEGIN {
+ case 'c':
+ per_channel = 1;
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if (argc)
+ usage();
+
+ eopen_stream(&stream, NULL);
+
+ if (stream.width > 2 || stream.height > 2 || stream.width *
stream.height != 2)
+ eprintf("<stdin>: each frame must contain exactly 2 pixels\n");
+
+ stream.width = 3;
+ stream.height = 3;
+ fprint_stream_head(stdout, &stream);
+ efflush(stdout, "<stdout>");
+
+ if (!strcmp(stream.pixfmt, "xyza"))
+ process = process_lf;
+ else if (!strcmp(stream.pixfmt, "xyza f"))
+ process = process_f;
+ else
+ eprintf("pixel format %s is not supported, try xyza\n",
stream.pixfmt);
+
+ process(&stream);
+ return 0;
+}
diff --git a/src/blind-matrix-reflect.c b/src/blind-matrix-reflect.c
new file mode 100644
index 0000000..905ec96
--- /dev/null
+++ b/src/blind-matrix-reflect.c
@@ -0,0 +1,87 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+USAGE("[-c]")
+
+static int per_channel = 0;
+
+#define PROCESS(TYPE)\
+ do {\
+ typedef TYPE pixel_t[4];\
+ pixel_t matrix[9];\
+ pixel_t buf[2];\
+ TYPE x2, y2, norm2;\
+ int i;\
+ \
+ for (i = 0; i < 4; i++) {\
+ matrix[0][i] = 1, matrix[1][i] = 0, matrix[2][i] = 0;\
+ matrix[3][i] = 0, matrix[4][i] = 1, matrix[5][i] = 0;\
+ matrix[6][i] = 0, matrix[7][i] = 0, matrix[8][i] = 1;\
+ }\
+ \
+ while (eread_frame(stream, buf)) {\
+ if (per_channel) {\
+ for (i = 0; i < 4; i++) {\
+ x2 = buf[0][i] * buf[0][i];\
+ y2 = buf[1][i] * buf[1][i];\
+ norm2 = x2 + y2;\
+ matrix[4][i] = -(matrix[0][i] = (x2 -
y2) / norm2);\
+ matrix[3][i] = matrix[1][i] = 2 *
buf[0][i] * buf[1][i] / norm2;\
+ }\
+ } else {\
+ buf[0][1] *= buf[0][3];\
+ buf[1][1] *= buf[1][3];\
+ x2 = buf[0][1] * buf[0][1];\
+ y2 = buf[1][1] * buf[1][1];\
+ norm2 = x2 + y2;\
+ matrix[4][0] = -(matrix[0][0] = (x2 - y2) /
norm2);\
+ matrix[3][0] = matrix[1][0] = 2 * buf[0][1] *
buf[1][1] / norm2;\
+ matrix[0][3] = matrix[0][2] = matrix[0][1] =
matrix[0][0];\
+ matrix[1][3] = matrix[1][2] = matrix[1][1] =
matrix[1][0];\
+ matrix[3][3] = matrix[3][2] = matrix[3][1] =
matrix[3][0];\
+ matrix[4][3] = matrix[4][2] = matrix[4][1] =
matrix[4][0];\
+ }\
+ ewriteall(STDOUT_FILENO, matrix, sizeof(matrix),
"<stdout>");\
+ }\
+ } while (0)
+
+static void process_lf(struct stream *stream) { PROCESS(double); }
+static void process_f(struct stream *stream) { PROCESS(float); }
+
+int
+main(int argc, char *argv[])
+{
+ struct stream stream;
+ void (*process)(struct stream *stream);
+
+ ARGBEGIN {
+ case 'c':
+ per_channel = 1;
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if (argc)
+ usage();
+
+ eopen_stream(&stream, NULL);
+
+ if (stream.width > 2 || stream.height > 2 || stream.width *
stream.height != 2)
+ eprintf("<stdin>: each frame must contain exactly 2 pixels\n");
+
+ stream.width = 3;
+ stream.height = 3;
+ fprint_stream_head(stdout, &stream);
+ efflush(stdout, "<stdout>");
+
+ if (!strcmp(stream.pixfmt, "xyza"))
+ process = process_lf;
+ else if (!strcmp(stream.pixfmt, "xyza f"))
+ process = process_f;
+ else
+ eprintf("pixel format %s is not supported, try xyza\n",
stream.pixfmt);
+
+ process(&stream);
+ return 0;
+}
diff --git a/src/blind-matrix-rotate.c b/src/blind-matrix-rotate.c
new file mode 100644
index 0000000..3e2f5e3
--- /dev/null
+++ b/src/blind-matrix-rotate.c
@@ -0,0 +1,79 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+USAGE("[-c]")
+
+static int per_channel = 0;
+
+#define PROCESS(TYPE)\
+ do {\
+ typedef TYPE pixel_t[4];\
+ pixel_t matrix[9];\
+ pixel_t buf;\
+ int i;\
+ \
+ for (i = 0; i < 4; i++) {\
+ matrix[0][i] = 1, matrix[1][i] = 0, matrix[2][i] = 0;\
+ matrix[3][i] = 0, matrix[4][i] = 1, matrix[5][i] = 0;\
+ matrix[6][i] = 0, matrix[7][i] = 0, matrix[8][i] = 1;\
+ }\
+ \
+ while (eread_frame(stream, buf)) {\
+ if (per_channel) {\
+ for (i = 0; i < 4; i++) {\
+ matrix[4][i] = matrix[0][i] =
cos(buf[i]);\
+ matrix[3][i] = -(matrix[1][i] =
sin(buf[i]));\
+ }\
+ } else {\
+ buf[1] *= buf[3];\
+ matrix[4][0] = matrix[0][0] = cos(buf[1]);\
+ matrix[3][0] = -(matrix[1][0] = sin(buf[1]));\
+ matrix[0][3] = matrix[0][2] = matrix[0][1] =
matrix[0][0];\
+ matrix[1][3] = matrix[0][2] = matrix[0][1] =
matrix[1][0];\
+ matrix[3][3] = matrix[0][2] = matrix[0][1] =
matrix[3][0];\
+ matrix[4][3] = matrix[0][2] = matrix[0][1] =
matrix[4][0];\
+ }\
+ ewriteall(STDOUT_FILENO, matrix, sizeof(matrix),
"<stdout>");\
+ }\
+ } while (0)
+
+static void process_lf(struct stream *stream) { PROCESS(double); }
+static void process_f(struct stream *stream) { PROCESS(float); }
+
+int
+main(int argc, char *argv[])
+{
+ struct stream stream;
+ void (*process)(struct stream *stream);
+
+ ARGBEGIN {
+ case 'c':
+ per_channel = 1;
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if (argc)
+ usage();
+
+ eopen_stream(&stream, NULL);
+
+ if (stream.width != 1 && stream.height != 1)
+ eprintf("<stdin>: each frame must contain exactly 1 pixels\n");
+
+ stream.width = 3;
+ stream.height = 3;
+ fprint_stream_head(stdout, &stream);
+ efflush(stdout, "<stdout>");
+
+ if (!strcmp(stream.pixfmt, "xyza"))
+ process = process_lf;
+ else if (!strcmp(stream.pixfmt, "xyza f"))
+ process = process_f;
+ else
+ eprintf("pixel format %s is not supported, try xyza\n",
stream.pixfmt);
+
+ process(&stream);
+ return 0;
+}
diff --git a/src/blind-matrix-scale.c b/src/blind-matrix-scale.c
new file mode 100644
index 0000000..8dd6b83
--- /dev/null
+++ b/src/blind-matrix-scale.c
@@ -0,0 +1,74 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+USAGE("[-c]")
+
+static int per_channel = 0;
+
+#define PROCESS(TYPE)\
+ do {\
+ typedef TYPE pixel_t[4];\
+ pixel_t matrix[9];\
+ pixel_t buf[2];\
+ int i;\
+ \
+ for (i = 0; i < 4; i++) {\
+ matrix[0][i] = 1, matrix[1][i] = 0, matrix[2][i] = 0;\
+ matrix[3][i] = 0, matrix[4][i] = 1, matrix[5][i] = 0;\
+ matrix[6][i] = 0, matrix[7][i] = 0, matrix[8][i] = 1;\
+ }\
+ \
+ while (eread_frame(stream, buf)) {\
+ if (per_channel) {\
+ for (i = 0; i < 4; i++) {\
+ matrix[0][i] = buf[0][i];\
+ matrix[4][i] = buf[1][i];\
+ }\
+ } else {\
+ matrix[0][3] = matrix[0][2] = matrix[0][1] =
matrix[0][0] = buf[0][1] * buf[0][3];\
+ matrix[4][3] = matrix[4][2] = matrix[4][1] =
matrix[4][0] = buf[1][1] * buf[1][3];\
+ }\
+ ewriteall(STDOUT_FILENO, matrix, sizeof(matrix),
"<stdout>");\
+ }\
+ } while (0)
+
+static void process_lf(struct stream *stream) { PROCESS(double); }
+static void process_f(struct stream *stream) { PROCESS(float); }
+
+int
+main(int argc, char *argv[])
+{
+ struct stream stream;
+ void (*process)(struct stream *stream);
+
+ ARGBEGIN {
+ case 'c':
+ per_channel = 1;
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if (argc)
+ usage();
+
+ eopen_stream(&stream, NULL);
+
+ if (stream.width > 2 || stream.height > 2 || stream.width *
stream.height != 2)
+ eprintf("<stdin>: each frame must contain exactly 2 pixels\n");
+
+ stream.width = 3;
+ stream.height = 3;
+ fprint_stream_head(stdout, &stream);
+ efflush(stdout, "<stdout>");
+
+ if (!strcmp(stream.pixfmt, "xyza"))
+ process = process_lf;
+ else if (!strcmp(stream.pixfmt, "xyza f"))
+ process = process_f;
+ else
+ eprintf("pixel format %s is not supported, try xyza\n",
stream.pixfmt);
+
+ process(&stream);
+ return 0;
+}
diff --git a/src/blind-matrix-shear.c b/src/blind-matrix-shear.c
new file mode 100644
index 0000000..a4c742b
--- /dev/null
+++ b/src/blind-matrix-shear.c
@@ -0,0 +1,84 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+USAGE("[-ac]")
+
+static int by_angle = 0;
+static int per_channel = 0;
+
+#define PROCESS(TYPE)\
+ do {\
+ typedef TYPE pixel_t[4];\
+ pixel_t matrix[9];\
+ pixel_t buf[2];\
+ int i;\
+ \
+ for (i = 0; i < 4; i++) {\
+ matrix[0][i] = 1, matrix[1][i] = 0, matrix[2][i] = 0;\
+ matrix[3][i] = 0, matrix[4][i] = 1, matrix[5][i] = 0;\
+ matrix[6][i] = 0, matrix[7][i] = 0, matrix[8][i] = 1;\
+ }\
+ \
+ while (eread_frame(stream, buf)) {\
+ if (by_angle) {\
+ for (i = !per_channel; i < (per_channel ? 4 :
2); i++) {\
+ buf[0][i] = tan(buf[0][i]);\
+ buf[1][i] = tan(buf[1][i]);\
+ }\
+ }\
+ if (per_channel) {\
+ for (i = 0; i < 4; i++) {\
+ matrix[1][i] = buf[0][i];\
+ matrix[3][i] = buf[1][i];\
+ }\
+ } else {\
+ matrix[1][3] = matrix[1][2] = matrix[1][1] =
matrix[1][0] = buf[0][1] * buf[0][3];\
+ matrix[3][3] = matrix[3][2] = matrix[3][1] =
matrix[3][0] = buf[1][1] * buf[1][3];\
+ }\
+ ewriteall(STDOUT_FILENO, matrix, sizeof(matrix),
"<stdout>");\
+ }\
+ } while (0)
+
+static void process_lf(struct stream *stream) { PROCESS(double); }
+static void process_f(struct stream *stream) { PROCESS(float); }
+
+int
+main(int argc, char *argv[])
+{
+ struct stream stream;
+ void (*process)(struct stream *stream);
+
+ ARGBEGIN {
+ case 'a':
+ by_angle = 1;
+ break;
+ case 'c':
+ per_channel = 1;
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if (argc)
+ usage();
+
+ eopen_stream(&stream, NULL);
+
+ if (stream.width > 2 || stream.height > 2 || stream.width *
stream.height != 2)
+ eprintf("<stdin>: each frame must contain exactly 2 pixels\n");
+
+ stream.width = 3;
+ stream.height = 3;
+ fprint_stream_head(stdout, &stream);
+ efflush(stdout, "<stdout>");
+
+ if (!strcmp(stream.pixfmt, "xyza"))
+ process = process_lf;
+ else if (!strcmp(stream.pixfmt, "xyza f"))
+ process = process_f;
+ else
+ eprintf("pixel format %s is not supported, try xyza\n",
stream.pixfmt);
+
+ process(&stream);
+ return 0;
+}
diff --git a/src/blind-matrix-translate.c b/src/blind-matrix-translate.c
new file mode 100644
index 0000000..c761a7f
--- /dev/null
+++ b/src/blind-matrix-translate.c
@@ -0,0 +1,74 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+USAGE("[-c]")
+
+static int per_channel = 0;
+
+#define PROCESS(TYPE)\
+ do {\
+ typedef TYPE pixel_t[4];\
+ pixel_t matrix[9];\
+ pixel_t buf[2];\
+ int i;\
+ \
+ for (i = 0; i < 4; i++) {\
+ matrix[0][i] = 1, matrix[1][i] = 0, matrix[2][i] = 0;\
+ matrix[3][i] = 0, matrix[4][i] = 1, matrix[5][i] = 0;\
+ matrix[6][i] = 0, matrix[7][i] = 0, matrix[8][i] = 1;\
+ }\
+ \
+ while (eread_frame(stream, buf)) {\
+ if (per_channel) {\
+ for (i = 0; i < 4; i++) {\
+ matrix[2][i] = buf[0][i];\
+ matrix[5][i] = buf[1][i];\
+ }\
+ } else {\
+ matrix[2][3] = matrix[2][2] = matrix[2][1] =
matrix[2][0] = buf[0][1] * buf[0][3];\
+ matrix[5][3] = matrix[5][2] = matrix[5][1] =
matrix[5][0] = buf[1][1] * buf[1][3];\
+ }\
+ ewriteall(STDOUT_FILENO, matrix, sizeof(matrix),
"<stdout>");\
+ }\
+ } while (0)
+
+static void process_lf(struct stream *stream) { PROCESS(double); }
+static void process_f(struct stream *stream) { PROCESS(float); }
+
+int
+main(int argc, char *argv[])
+{
+ struct stream stream;
+ void (*process)(struct stream *stream);
+
+ ARGBEGIN {
+ case 'c':
+ per_channel = 1;
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if (argc)
+ usage();
+
+ eopen_stream(&stream, NULL);
+
+ if (stream.width > 2 || stream.height > 2 || stream.width *
stream.height != 2)
+ eprintf("<stdin>: each frame must contain exactly 2 pixels\n");
+
+ stream.width = 3;
+ stream.height = 3;
+ fprint_stream_head(stdout, &stream);
+ efflush(stdout, "<stdout>");
+
+ if (!strcmp(stream.pixfmt, "xyza"))
+ process = process_lf;
+ else if (!strcmp(stream.pixfmt, "xyza f"))
+ process = process_f;
+ else
+ eprintf("pixel format %s is not supported, try xyza\n",
stream.pixfmt);
+
+ process(&stream);
+ return 0;
+}
diff --git a/src/blind-matrix-transpose.c b/src/blind-matrix-transpose.c
new file mode 100644
index 0000000..2103205
--- /dev/null
+++ b/src/blind-matrix-transpose.c
@@ -0,0 +1,76 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+USAGE("[-c]")
+
+static int per_channel = 0;
+
+#define PROCESS(TYPE)\
+ do {\
+ typedef TYPE pixel_t[4];\
+ pixel_t matrix[9];\
+ pixel_t buf;\
+ int i;\
+ \
+ for (i = 0; i < 4; i++) {\
+ matrix[0][i] = 1, matrix[1][i] = 0, matrix[2][i] = 0;\
+ matrix[3][i] = 0, matrix[4][i] = 1, matrix[5][i] = 0;\
+ matrix[6][i] = 0, matrix[7][i] = 0, matrix[8][i] = 1;\
+ }\
+ \
+ while (eread_frame(stream, buf)) {\
+ if (per_channel) {\
+ for (i = 0; i < 4; i++) {\
+ matrix[3][i] = matrix[1][i] = buf[i];\
+ matrix[4][i] = matrix[0][i] = 1 -
buf[i];\
+ }\
+ } else {\
+ for (i = 0; i < 4; i++) {\
+ matrix[3][i] = matrix[1][i] = buf[1] *
buf[3];\
+ matrix[4][i] = matrix[0][i] = 1 -
matrix[3][i];\
+ }\
+ }\
+ ewriteall(STDOUT_FILENO, matrix, sizeof(matrix),
"<stdout>");\
+ }\
+ } while (0)
+
+static void process_lf(struct stream *stream) { PROCESS(double); }
+static void process_f(struct stream *stream) { PROCESS(float); }
+
+int
+main(int argc, char *argv[])
+{
+ struct stream stream;
+ void (*process)(struct stream *stream);
+
+ ARGBEGIN {
+ case 'c':
+ per_channel = 1;
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if (argc)
+ usage();
+
+ eopen_stream(&stream, NULL);
+
+ if (stream.width != 1 && stream.height != 12)
+ eprintf("<stdin>: each frame must contain exactly 1 pixels\n");
+
+ stream.width = 3;
+ stream.height = 3;
+ fprint_stream_head(stdout, &stream);
+ efflush(stdout, "<stdout>");
+
+ if (!strcmp(stream.pixfmt, "xyza"))
+ process = process_lf;
+ else if (!strcmp(stream.pixfmt, "xyza f"))
+ process = process_f;
+ else
+ eprintf("pixel format %s is not supported, try xyza\n",
stream.pixfmt);
+
+ process(&stream);
+ return 0;
+}
diff --git a/src/video-math.h b/src/video-math.h
index 281c8f6..28ac4f2 100644
--- a/src/video-math.h
+++ b/src/video-math.h
@@ -71,6 +71,7 @@ posmodf(float a, float b)
#define posmod(...) MATH_GENERIC_N(posmod, __VA_ARGS__)
#define cos(...) MATH_GENERIC_1(cos, __VA_ARGS__)
#define sin(...) MATH_GENERIC_1(sin, __VA_ARGS__)
+#define tan(...) MATH_GENERIC_1(tan, __VA_ARGS__)
#define atan2(...) MATH_GENERIC_N(atan2, __VA_ARGS__)
#define srgb_encode(...) BLIND_GENERIC_1(srgb_encode, __VA_ARGS__)
