forked from 12to11/12to11
Add files for viewporter support
* transform.c: * viewporter.xml: * wp_viewporter.c: New files.
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oldosfan
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3 changed files with 623 additions and 0 deletions
177
transform.c
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177
transform.c
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/* Wayland compositor running on top of an X server.
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Copyright (C) 2022 to various contributors.
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This file is part of 12to11.
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12to11 is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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12to11 is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with 12to11. If not, see <https://www.gnu.org/licenses/>. */
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/* Generic 3x3 matrix transform code. */
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#include <string.h>
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#include <stdio.h>
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#include "compositor.h"
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#include <X11/extensions/Xrender.h>
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/* These macros make column major order easier to reason about for C
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folks. */
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#define Index(matrix, row, column) \
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((matrix)[(column) * 3 + (row)])
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#define MultiplySub(a, b, a_row, a_column, b_row, b_column) \
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(Index (a, a_row, a_column) * Index (b, b_row, b_column))
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#if 0
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static void
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MatrixPrint (Matrix *matrix)
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{
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fprintf (stderr,
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"%4f %4f %4f\n"
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"%4f %4f %4f\n"
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"%4f %4f %4f\n\n",
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(double) Index (*matrix, 0, 0),
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(double) Index (*matrix, 0, 1),
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(double) Index (*matrix, 0, 2),
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(double) Index (*matrix, 1, 0),
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(double) Index (*matrix, 1, 1),
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(double) Index (*matrix, 1, 2),
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(double) Index (*matrix, 2, 0),
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(double) Index (*matrix, 2, 1),
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(double) Index (*matrix, 2, 2));
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}
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#endif
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void
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MatrixMultiply (Matrix a, Matrix b, Matrix *product)
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{
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Index (*product, 0, 0) = (MultiplySub (a, b, 0, 0, 0, 0)
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+ MultiplySub (a, b, 0, 1, 1, 0)
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+ MultiplySub (a, b, 0, 2, 2, 0));
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Index (*product, 0, 1) = (MultiplySub (a, b, 0, 0, 0, 1)
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+ MultiplySub (a, b, 0, 1, 1, 1)
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+ MultiplySub (a, b, 0, 2, 2, 1));
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Index (*product, 0, 2) = (MultiplySub (a, b, 0, 0, 0, 2)
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+ MultiplySub (a, b, 0, 1, 1, 2)
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+ MultiplySub (a, b, 0, 2, 2, 2));
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Index (*product, 1, 0) = (MultiplySub (a, b, 1, 0, 0, 0)
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+ MultiplySub (a, b, 1, 1, 1, 0)
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+ MultiplySub (a, b, 1, 2, 2, 0));
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Index (*product, 1, 1) = (MultiplySub (a, b, 1, 0, 0, 1)
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+ MultiplySub (a, b, 1, 1, 1, 1)
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+ MultiplySub (a, b, 1, 2, 2, 1));
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Index (*product, 1, 2) = (MultiplySub (a, b, 1, 0, 0, 2)
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+ MultiplySub (a, b, 1, 1, 1, 2)
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+ MultiplySub (a, b, 1, 2, 2, 2));
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Index (*product, 2, 0) = (MultiplySub (a, b, 2, 0, 0, 0)
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+ MultiplySub (a, b, 2, 1, 1, 0)
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+ MultiplySub (a, b, 2, 2, 2, 0));
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Index (*product, 2, 1) = (MultiplySub (a, b, 2, 0, 0, 1)
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+ MultiplySub (a, b, 2, 1, 1, 1)
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+ MultiplySub (a, b, 2, 2, 2, 1));
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Index (*product, 2, 2) = (MultiplySub (a, b, 2, 0, 0, 2)
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+ MultiplySub (a, b, 2, 1, 1, 2)
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+ MultiplySub (a, b, 2, 2, 2, 2));
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}
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void
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MatrixIdentity (Matrix *matrix)
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{
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memset (matrix, 0, sizeof *matrix);
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Index (*matrix, 0, 0) = 1.0f;
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Index (*matrix, 1, 1) = 1.0f;
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Index (*matrix, 2, 2) = 1.0f;
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}
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void
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MatrixTranslate (Matrix *transform, float tx, float ty)
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{
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Matrix temp, copy;
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MatrixIdentity (&temp);
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memcpy (copy, transform, sizeof copy);
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/* Set the tx and ty. */
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Index (temp, 0, 2) = tx;
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Index (temp, 1, 2) = ty;
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/* Multiply it with the transform. */
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MatrixMultiply (copy, temp, transform);
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}
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void
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MatrixScale (Matrix *transform, float sx, float sy)
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{
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Matrix temp, copy;
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MatrixIdentity (&temp);
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memcpy (copy, transform, sizeof copy);
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/* Set the scale factors. */
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Index (temp, 0, 0) = sx;
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Index (temp, 1, 1) = sy;
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/* Multiply it with the transform. */
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MatrixMultiply (copy, temp, transform);
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}
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void
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MatrixExport (Matrix *transform, XTransform *xtransform)
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{
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/* M1 M2 M3 X
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M4 M5 M6 * Y
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M7 M8 M9 Z
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=
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M1*X + M2*Y + M3*1 = X1
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M4*X + M5*Y + M6*1 = Y1
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M7*X + M8*Y + M9*1 = Z1 (Only on some drivers)
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where
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M1 = matrix[0][0]
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M2 = matrix[0][1]
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M3 = matrix[0][2]
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M4 = matrix[1][0]
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M5 = matrix[1][1]
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M6 = matrix[1][2]
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M7 = matrix[2][0]
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M8 = matrix[2][1]
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M9 = matrix[2][2] */
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#define Export(row, column) \
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xtransform->matrix[row][column] \
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= XDoubleToFixed (Index (*transform, row, column))
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Export (0, 0);
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Export (0, 1);
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Export (0, 2);
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Export (1, 0);
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Export (1, 1);
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Export (1, 2);
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Export (2, 0);
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Export (2, 1);
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Export (2, 2);
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#undef Export
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}
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180
viewporter.xml
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180
viewporter.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<protocol name="viewporter">
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<copyright>
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Copyright © 2013-2016 Collabora, Ltd.
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice (including the next
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paragraph) shall be included in all copies or substantial portions of the
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Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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</copyright>
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<interface name="wp_viewporter" version="1">
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<description summary="surface cropping and scaling">
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The global interface exposing surface cropping and scaling
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capabilities is used to instantiate an interface extension for a
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wl_surface object. This extended interface will then allow
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cropping and scaling the surface contents, effectively
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disconnecting the direct relationship between the buffer and the
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surface size.
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</description>
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<request name="destroy" type="destructor">
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<description summary="unbind from the cropping and scaling interface">
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Informs the server that the client will not be using this
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protocol object anymore. This does not affect any other objects,
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wp_viewport objects included.
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</description>
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</request>
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<enum name="error">
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<entry name="viewport_exists" value="0"
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summary="the surface already has a viewport object associated"/>
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</enum>
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<request name="get_viewport">
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<description summary="extend surface interface for crop and scale">
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Instantiate an interface extension for the given wl_surface to
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crop and scale its content. If the given wl_surface already has
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a wp_viewport object associated, the viewport_exists
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protocol error is raised.
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</description>
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<arg name="id" type="new_id" interface="wp_viewport"
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summary="the new viewport interface id"/>
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<arg name="surface" type="object" interface="wl_surface"
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summary="the surface"/>
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</request>
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</interface>
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<interface name="wp_viewport" version="1">
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<description summary="crop and scale interface to a wl_surface">
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An additional interface to a wl_surface object, which allows the
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client to specify the cropping and scaling of the surface
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contents.
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This interface works with two concepts: the source rectangle (src_x,
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src_y, src_width, src_height), and the destination size (dst_width,
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dst_height). The contents of the source rectangle are scaled to the
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destination size, and content outside the source rectangle is ignored.
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This state is double-buffered, and is applied on the next
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wl_surface.commit.
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The two parts of crop and scale state are independent: the source
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rectangle, and the destination size. Initially both are unset, that
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is, no scaling is applied. The whole of the current wl_buffer is
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used as the source, and the surface size is as defined in
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wl_surface.attach.
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If the destination size is set, it causes the surface size to become
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dst_width, dst_height. The source (rectangle) is scaled to exactly
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this size. This overrides whatever the attached wl_buffer size is,
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unless the wl_buffer is NULL. If the wl_buffer is NULL, the surface
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has no content and therefore no size. Otherwise, the size is always
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at least 1x1 in surface local coordinates.
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If the source rectangle is set, it defines what area of the wl_buffer is
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taken as the source. If the source rectangle is set and the destination
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size is not set, then src_width and src_height must be integers, and the
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surface size becomes the source rectangle size. This results in cropping
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without scaling. If src_width or src_height are not integers and
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destination size is not set, the bad_size protocol error is raised when
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the surface state is applied.
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The coordinate transformations from buffer pixel coordinates up to
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the surface-local coordinates happen in the following order:
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1. buffer_transform (wl_surface.set_buffer_transform)
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2. buffer_scale (wl_surface.set_buffer_scale)
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3. crop and scale (wp_viewport.set*)
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This means, that the source rectangle coordinates of crop and scale
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are given in the coordinates after the buffer transform and scale,
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i.e. in the coordinates that would be the surface-local coordinates
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if the crop and scale was not applied.
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If src_x or src_y are negative, the bad_value protocol error is raised.
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Otherwise, if the source rectangle is partially or completely outside of
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the non-NULL wl_buffer, then the out_of_buffer protocol error is raised
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when the surface state is applied. A NULL wl_buffer does not raise the
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out_of_buffer error.
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If the wl_surface associated with the wp_viewport is destroyed,
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all wp_viewport requests except 'destroy' raise the protocol error
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no_surface.
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If the wp_viewport object is destroyed, the crop and scale
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state is removed from the wl_surface. The change will be applied
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on the next wl_surface.commit.
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</description>
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<request name="destroy" type="destructor">
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<description summary="remove scaling and cropping from the surface">
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The associated wl_surface's crop and scale state is removed.
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The change is applied on the next wl_surface.commit.
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</description>
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</request>
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<enum name="error">
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<entry name="bad_value" value="0"
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summary="negative or zero values in width or height"/>
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<entry name="bad_size" value="1"
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summary="destination size is not integer"/>
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<entry name="out_of_buffer" value="2"
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summary="source rectangle extends outside of the content area"/>
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<entry name="no_surface" value="3"
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summary="the wl_surface was destroyed"/>
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</enum>
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<request name="set_source">
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<description summary="set the source rectangle for cropping">
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Set the source rectangle of the associated wl_surface. See
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wp_viewport for the description, and relation to the wl_buffer
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size.
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If all of x, y, width and height are -1.0, the source rectangle is
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unset instead. Any other set of values where width or height are zero
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or negative, or x or y are negative, raise the bad_value protocol
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error.
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The crop and scale state is double-buffered state, and will be
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applied on the next wl_surface.commit.
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</description>
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<arg name="x" type="fixed" summary="source rectangle x"/>
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<arg name="y" type="fixed" summary="source rectangle y"/>
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<arg name="width" type="fixed" summary="source rectangle width"/>
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<arg name="height" type="fixed" summary="source rectangle height"/>
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</request>
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<request name="set_destination">
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<description summary="set the surface size for scaling">
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Set the destination size of the associated wl_surface. See
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wp_viewport for the description, and relation to the wl_buffer
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size.
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If width is -1 and height is -1, the destination size is unset
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instead. Any other pair of values for width and height that
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contains zero or negative values raises the bad_value protocol
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error.
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The crop and scale state is double-buffered state, and will be
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applied on the next wl_surface.commit.
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</description>
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<arg name="width" type="int" summary="surface width"/>
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<arg name="height" type="int" summary="surface height"/>
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</request>
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</interface>
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</protocol>
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266
wp_viewporter.c
Normal file
266
wp_viewporter.c
Normal file
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@ -0,0 +1,266 @@
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/* Wayland compositor running on top of an X server.
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Copyright (C) 2022 to various contributors.
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This file is part of 12to11.
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12to11 is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
|
||||||
|
option) any later version.
|
||||||
|
|
||||||
|
12to11 is distributed in the hope that it will be useful, but WITHOUT
|
||||||
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||||
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||||
|
for more details.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
along with 12to11. If not, see <https://www.gnu.org/licenses/>. */
|
||||||
|
|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
#include "compositor.h"
|
||||||
|
#include "viewporter.h"
|
||||||
|
|
||||||
|
typedef struct _ViewportExt ViewportExt;
|
||||||
|
|
||||||
|
struct _ViewportExt
|
||||||
|
{
|
||||||
|
/* The attached surface. */
|
||||||
|
Surface *surface;
|
||||||
|
|
||||||
|
/* The attached callback. */
|
||||||
|
DestroyCallback *destroy_callback;
|
||||||
|
|
||||||
|
/* The associated wl_resource. */
|
||||||
|
struct wl_resource *resource;
|
||||||
|
};
|
||||||
|
|
||||||
|
/* The wp_viewporter global. */
|
||||||
|
static struct wl_global *viewporter_global;
|
||||||
|
|
||||||
|
static void
|
||||||
|
HandleResourceDestroy (struct wl_resource *resource)
|
||||||
|
{
|
||||||
|
ViewportExt *ext;
|
||||||
|
|
||||||
|
ext = wl_resource_get_user_data (resource);
|
||||||
|
|
||||||
|
/* Free the user data and detach the surface destroy callback. */
|
||||||
|
|
||||||
|
if (ext->surface)
|
||||||
|
{
|
||||||
|
XLSurfaceCancelRunOnFree (ext->destroy_callback);
|
||||||
|
ext->surface->viewport = NULL;
|
||||||
|
|
||||||
|
/* Clear viewport data. */
|
||||||
|
ext->surface->pending_state.pending |= PendingViewportSrc;
|
||||||
|
ext->surface->pending_state.pending |= PendingViewportDest;
|
||||||
|
ext->surface->pending_state.src_x = -1.0;
|
||||||
|
ext->surface->pending_state.src_y = -1.0;
|
||||||
|
ext->surface->pending_state.src_width = -1.0;
|
||||||
|
ext->surface->pending_state.src_height = -1.0;
|
||||||
|
ext->surface->pending_state.dest_width = -1;
|
||||||
|
ext->surface->pending_state.dest_height = -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
XLFree (ext);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
HandleSurfaceDestroy (void *data)
|
||||||
|
{
|
||||||
|
ViewportExt *ext;
|
||||||
|
|
||||||
|
ext = data;
|
||||||
|
|
||||||
|
/* Clear callbacks and surface, as they are now gone. */
|
||||||
|
ext->surface = NULL;
|
||||||
|
ext->destroy_callback = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
DestroyViewport (struct wl_client *client, struct wl_resource *resource)
|
||||||
|
{
|
||||||
|
wl_resource_destroy (resource);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
SetSource (struct wl_client *client, struct wl_resource *resource,
|
||||||
|
wl_fixed_t x, wl_fixed_t y, wl_fixed_t width, wl_fixed_t height)
|
||||||
|
{
|
||||||
|
ViewportExt *ext;
|
||||||
|
double src_x, src_y, src_width, src_height;
|
||||||
|
|
||||||
|
ext = wl_resource_get_user_data (resource);
|
||||||
|
|
||||||
|
/* Check that the surface is still attached. */
|
||||||
|
if (!ext->surface)
|
||||||
|
{
|
||||||
|
wl_resource_post_error (resource, WP_VIEWPORT_ERROR_NO_SURFACE,
|
||||||
|
"the surface has been detached");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
src_x = wl_fixed_to_double (x);
|
||||||
|
src_y = wl_fixed_to_double (y);
|
||||||
|
src_width = wl_fixed_to_double (width);
|
||||||
|
src_height = wl_fixed_to_double (height);
|
||||||
|
|
||||||
|
/* Now, verify that the values are correct. They can either all be
|
||||||
|
-1, or the origin must be positive, and width and height must be
|
||||||
|
more than 0. */
|
||||||
|
if (!(src_x == -1.0 && src_y == -1.0 && src_width == -1.0
|
||||||
|
&& src_height == -1.0)
|
||||||
|
&& (src_x < 0 || src_y < 0
|
||||||
|
|| src_width < 1.0 || src_height < 1.0))
|
||||||
|
wl_resource_post_error (resource, WP_VIEWPORT_ERROR_BAD_VALUE,
|
||||||
|
"invalid source rectangle specified");
|
||||||
|
|
||||||
|
ext->surface->pending_state.pending |= PendingViewportSrc;
|
||||||
|
ext->surface->pending_state.src_x = src_x;
|
||||||
|
ext->surface->pending_state.src_y = src_y;
|
||||||
|
ext->surface->pending_state.src_width = src_width;
|
||||||
|
ext->surface->pending_state.src_height = src_height;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
SetDestination (struct wl_client *client, struct wl_resource *resource,
|
||||||
|
int32_t width, int32_t height)
|
||||||
|
{
|
||||||
|
ViewportExt *ext;
|
||||||
|
|
||||||
|
ext = wl_resource_get_user_data (resource);
|
||||||
|
|
||||||
|
/* Check that the surface is still attached. */
|
||||||
|
if (!ext->surface)
|
||||||
|
{
|
||||||
|
wl_resource_post_error (resource, WP_VIEWPORT_ERROR_NO_SURFACE,
|
||||||
|
"the surface has been detached");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
if ((width <= 0 || height <= 0)
|
||||||
|
&& !(width == -1 && height == -1))
|
||||||
|
{
|
||||||
|
wl_resource_post_error (resource, WP_VIEWPORT_ERROR_BAD_VALUE,
|
||||||
|
"invalid destination size specified");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
ext->surface->pending_state.pending |= PendingViewportDest;
|
||||||
|
ext->surface->pending_state.dest_width = width;
|
||||||
|
ext->surface->pending_state.dest_height = height;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct wp_viewport_interface wp_viewport_impl =
|
||||||
|
{
|
||||||
|
.destroy = DestroyViewport,
|
||||||
|
.set_source = SetSource,
|
||||||
|
.set_destination = SetDestination,
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
static void
|
||||||
|
Destroy (struct wl_client *client, struct wl_resource *resource)
|
||||||
|
{
|
||||||
|
wl_resource_destroy (resource);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
GetViewport (struct wl_client *client, struct wl_resource *resource,
|
||||||
|
uint32_t id, struct wl_resource *surface_resource)
|
||||||
|
{
|
||||||
|
ViewportExt *ext;
|
||||||
|
Surface *surface;
|
||||||
|
|
||||||
|
surface = wl_resource_get_user_data (surface_resource);
|
||||||
|
|
||||||
|
/* If the surface already has a viewport resource attached, post an
|
||||||
|
error. */
|
||||||
|
if (surface->viewport)
|
||||||
|
{
|
||||||
|
wl_resource_post_error (resource, WP_VIEWPORTER_ERROR_VIEWPORT_EXISTS,
|
||||||
|
"viewport already exists");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
ext = XLSafeMalloc (sizeof *ext);
|
||||||
|
|
||||||
|
if (!ext)
|
||||||
|
{
|
||||||
|
wl_resource_post_no_memory (resource);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
memset (ext, 0, sizeof *ext);
|
||||||
|
ext->resource
|
||||||
|
= wl_resource_create (client, &wp_viewport_interface,
|
||||||
|
wl_resource_get_version (resource), id);
|
||||||
|
|
||||||
|
if (!ext->resource)
|
||||||
|
{
|
||||||
|
XLFree (ext);
|
||||||
|
wl_resource_post_no_memory (resource);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Attach the surface. */
|
||||||
|
ext->surface = wl_resource_get_user_data (surface_resource);
|
||||||
|
ext->destroy_callback
|
||||||
|
= XLSurfaceRunOnFree (ext->surface, HandleSurfaceDestroy,
|
||||||
|
ext);
|
||||||
|
surface->viewport = ext;
|
||||||
|
|
||||||
|
wl_resource_set_implementation (ext->resource, &wp_viewport_impl,
|
||||||
|
ext, HandleResourceDestroy);
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct wp_viewporter_interface wp_viewporter_impl =
|
||||||
|
{
|
||||||
|
.destroy = Destroy,
|
||||||
|
.get_viewport = GetViewport,
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
static void
|
||||||
|
HandleBind (struct wl_client *client, void *data, uint32_t version,
|
||||||
|
uint32_t id)
|
||||||
|
{
|
||||||
|
struct wl_resource *resource;
|
||||||
|
|
||||||
|
resource = wl_resource_create (client, &wp_viewporter_interface,
|
||||||
|
version, id);
|
||||||
|
if (!resource)
|
||||||
|
{
|
||||||
|
wl_client_post_no_memory (client);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
wl_resource_set_implementation (resource, &wp_viewporter_impl, NULL,
|
||||||
|
NULL);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
XLInitWpViewporter (void)
|
||||||
|
{
|
||||||
|
viewporter_global = wl_global_create (compositor.wl_display,
|
||||||
|
&wp_viewporter_interface,
|
||||||
|
1, NULL, HandleBind);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
XLWpViewportReportBadSize (ViewportExt *ext)
|
||||||
|
{
|
||||||
|
wl_resource_post_error (ext->resource, WP_VIEWPORT_ERROR_BAD_SIZE,
|
||||||
|
"invalid non-integer size specified");
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
XLWpViewportReportOutOfBuffer (ViewportExt *ext)
|
||||||
|
{
|
||||||
|
wl_resource_post_error (ext->resource, WP_VIEWPORT_ERROR_OUT_OF_BUFFER,
|
||||||
|
"viewport source rectangle out of buffer");
|
||||||
|
}
|
||||||
Loading…
Add table
Reference in a new issue