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/*----------------------------------------------------------------------* |
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* File: rxvtimg.C |
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*----------------------------------------------------------------------* |
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* |
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* All portions of code are copyright by their respective author/s. |
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* Copyright (c) 2012 Marc Lehmann <schmorp@schmorp.de> |
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* Copyright (c) 2012 Emanuele Giaquinta <e.giaquinta@glauco.it> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*---------------------------------------------------------------------*/ |
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|
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#include <string.h> |
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#include <math.h> |
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#include "../config.h" |
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#include "rxvt.h" |
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|
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#if HAVE_IMG |
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|
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typedef rxvt_img::nv nv; |
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|
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namespace |
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{ |
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struct mat3x3 |
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{ |
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nv v[3][3]; |
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|
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mat3x3 () |
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{ |
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} |
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|
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mat3x3 (const nv *matrix) |
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{ |
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memcpy (v, matrix, sizeof (v)); |
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} |
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|
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mat3x3 (nv v11, nv v12, nv v13, nv v21, nv v22, nv v23, nv v31, nv v32, nv v33) |
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{ |
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v[0][0] = v11; v[0][1] = v12; v[0][2] = v13; |
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v[1][0] = v21; v[1][1] = v22; v[1][2] = v23; |
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v[2][0] = v31; v[2][1] = v32; v[2][2] = v33; |
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} |
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|
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mat3x3 inverse (); |
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|
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nv *operator [](int i) { return &v[i][0]; } |
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const nv *operator [](int i) const { return &v[i][0]; } |
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|
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operator const nv * () const { return &v[0][0]; } |
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operator nv * () { return &v[0][0]; } |
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|
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// quite inefficient, hopefully gcc pulls the w calc out of any loops |
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nv apply1 (int i, nv x, nv y) |
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{ |
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mat3x3 &m = *this; |
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|
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nv v = m[i][0] * x + m[i][1] * y + m[i][2]; |
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nv w = m[2][0] * x + m[2][1] * y + m[2][2]; |
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|
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return v * (1. / w); |
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} |
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|
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static mat3x3 translate (nv x, nv y); |
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static mat3x3 scale (nv s, nv t); |
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static mat3x3 rotate (nv phi); |
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}; |
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|
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mat3x3 |
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mat3x3::inverse () |
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{ |
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mat3x3 &m = *this; |
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mat3x3 inv; |
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|
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nv s0 = m[2][2] * m[1][1] - m[2][1] * m[1][2]; |
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nv s1 = m[2][1] * m[0][2] - m[2][2] * m[0][1]; |
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nv s2 = m[1][2] * m[0][1] - m[1][1] * m[0][2]; |
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|
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nv invdet = 1. / (m[0][0] * s0 + m[1][0] * s1 + m[2][0] * s2); |
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|
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inv[0][0] = invdet * s0; |
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inv[0][1] = invdet * s1; |
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inv[0][2] = invdet * s2; |
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|
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inv[1][0] = invdet * (m[2][0] * m[1][2] - m[2][2] * m[1][0]); |
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inv[1][1] = invdet * (m[2][2] * m[0][0] - m[2][0] * m[0][2]); |
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inv[1][2] = invdet * (m[1][0] * m[0][2] - m[1][2] * m[0][0]); |
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|
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inv[2][0] = invdet * (m[2][1] * m[1][0] - m[2][0] * m[1][1]); |
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inv[2][1] = invdet * (m[2][0] * m[0][1] - m[2][1] * m[0][0]); |
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inv[2][2] = invdet * (m[1][1] * m[0][0] - m[1][0] * m[0][1]); |
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|
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return inv; |
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} |
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|
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static mat3x3 |
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operator *(const mat3x3 &a, const mat3x3 &b) |
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{ |
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mat3x3 r; |
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|
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for (int i = 0; i < 3; ++i) |
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for (int j = 0; j < 3; ++j) |
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r[i][j] = a[i][0] * b[0][j] |
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+ a[i][1] * b[1][j] |
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+ a[i][2] * b[2][j]; |
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|
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return r; |
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} |
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|
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mat3x3 |
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mat3x3::translate (nv x, nv y) |
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{ |
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return mat3x3 ( |
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1, 0, x, |
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0, 1, y, |
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0, 0, 1 |
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); |
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} |
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|
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mat3x3 |
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mat3x3::scale (nv s, nv t) |
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{ |
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return mat3x3 ( |
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s, 0, 0, |
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0, t, 0, |
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0, 0, 1 |
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); |
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} |
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|
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// clockwise |
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mat3x3 |
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mat3x3::rotate (nv phi) |
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{ |
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nv s = sin (phi); |
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nv c = cos (phi); |
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|
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return mat3x3 ( |
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c, -s, 0, |
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s, c, 0, |
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0, 0, 1 |
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); |
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} |
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|
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struct composer |
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{ |
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rxvt_img *srcimg, *dstimg; |
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Picture src, dst, msk; |
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Display *dpy; |
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|
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ecb_noinline |
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composer (rxvt_img *srcimg, rxvt_img *dstimg = 0) |
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: srcimg (srcimg), dstimg (dstimg), msk (0) |
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{ |
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if (!this->dstimg) |
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this->dstimg = srcimg->new_empty (); |
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else if (!this->dstimg->pm) // somewhat unsatisfying |
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this->dstimg->alloc (); |
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|
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dpy = srcimg->d->dpy; |
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src = srcimg->picture (); |
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dst = this->dstimg->picture (); |
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} |
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|
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ecb_noinline |
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void mask (bool rgb = true, int w = 1, int h = 1) |
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{ |
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Pixmap pixmap = XCreatePixmap (dpy, srcimg->pm, w, h, rgb ? 32 : 8); |
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|
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XRenderPictFormat *format = XRenderFindStandardFormat (dpy, rgb ? PictStandardARGB32 : PictStandardA8); |
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XRenderPictureAttributes pa; |
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pa.repeat = RepeatNormal; |
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pa.component_alpha = rgb; |
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msk = XRenderCreatePicture (dpy, pixmap, format, CPRepeat | CPComponentAlpha, &pa); |
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|
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XFreePixmap (dpy, pixmap); |
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|
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ecb_assume (msk); |
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} |
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|
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// CreateSolidFill creates a very very very weird picture |
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void mask (const rgba &c) |
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{ |
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// the casts are needed in C++11 (see 8.5.1) |
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XRenderColor rc = { |
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(unsigned short)(c.r * c.a / 65535), |
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(unsigned short)(c.g * c.a / 65535), |
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(unsigned short)(c.b * c.a / 65535), |
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c.a |
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}; |
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msk = XRenderCreateSolidFill (dpy, &rc); |
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ecb_assume (msk); |
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} |
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|
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void fill (const rgba &c) |
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{ |
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XRenderColor rc = { |
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(unsigned short)(c.r * c.a / 65535), |
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(unsigned short)(c.g * c.a / 65535), |
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(unsigned short)(c.b * c.a / 65535), |
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c.a |
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}; |
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|
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XRenderFillRectangle (dpy, PictOpSrc, msk, &rc, 0, 0, 1, 1); |
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} |
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|
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operator rxvt_img *() |
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{ |
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return dstimg; |
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} |
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|
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ecb_noinline |
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~composer () |
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{ |
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XRenderFreePicture (dpy, src); |
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XRenderFreePicture (dpy, dst); |
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if (msk) XRenderFreePicture (dpy, msk); |
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} |
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}; |
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} |
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|
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static XRenderPictFormat * |
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find_alpha_format_for (Display *dpy, XRenderPictFormat *format) |
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{ |
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if (format->direct.alphaMask) |
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return format; // already has alpha |
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|
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// try to find a suitable alpha format, one bit alpha is enough for our purposes |
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if (format->type == PictTypeDirect) |
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for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n) |
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if (f->direct.alphaMask |
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&& f->type == PictTypeDirect |
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&& ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask ) |
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&& ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask) |
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&& ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask )) |
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return f; |
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|
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// should be a very good fallback |
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return XRenderFindStandardFormat (dpy, PictStandardARGB32); |
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} |
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|
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rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height, int repeat) |
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: d(screen->display), x(x), y(y), w(width), h(height), format(format), repeat(repeat), |
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pm(0), ref(0) |
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{ |
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} |
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|
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rxvt_img::rxvt_img (rxvt_display *display, XRenderPictFormat *format, int x, int y, int width, int height, int repeat) |
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: d(display), x(x), y(y), w(width), h(height), format(format), repeat(repeat), |
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pm(0), ref(0) |
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{ |
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} |
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|
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rxvt_img::rxvt_img (const rxvt_img &img) |
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: d(img.d), x(img.x), y(img.y), w(img.w), h(img.h), format(img.format), repeat(img.repeat), pm(img.pm), ref(img.ref) |
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{ |
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++ref->cnt; |
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} |
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|
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rxvt_img * |
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rxvt_img::new_from_root (rxvt_screen *s) |
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{ |
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Display *dpy = s->dpy; |
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unsigned int root_pm_w, root_pm_h; |
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Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa [XA_XROOTPMAP_ID]); |
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if (root_pixmap == None) |
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root_pixmap = s->display->get_pixmap_property (s->display->xa [XA_ESETROOT_PMAP_ID]); |
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|
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if (root_pixmap == None) |
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return 0; |
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|
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Window wdummy; |
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int idummy; |
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unsigned int udummy; |
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|
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if (!XGetGeometry (dpy, root_pixmap, &wdummy, &idummy, &idummy, &root_pm_w, &root_pm_h, &udummy, &udummy)) |
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return 0; |
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|
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rxvt_img *img = new rxvt_img ( |
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s, |
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XRenderFindVisualFormat (dpy, DefaultVisual (dpy, s->display->screen)), |
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0, |
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0, |
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root_pm_w, |
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root_pm_h |
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); |
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|
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img->pm = root_pixmap; |
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img->ref = new pixref (root_pm_w, root_pm_h); |
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img->ref->ours = false; |
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|
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return img; |
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} |
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|
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# if HAVE_PIXBUF |
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|
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rxvt_img * |
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rxvt_img::new_from_pixbuf (rxvt_screen *s, GdkPixbuf *pb) |
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{ |
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Display *dpy = s->dpy; |
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|
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int width = gdk_pixbuf_get_width (pb); |
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int height = gdk_pixbuf_get_height (pb); |
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|
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if (width > 32767 || height > 32767) // well, we *could* upload in chunks |
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rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n"); |
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|
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// since we require rgb24/argb32 formats from xrender we assume |
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// that both 24 and 32 bpp MUST be supported by any screen that supports xrender |
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|
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int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst; |
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|
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XImage xi; |
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|
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xi.width = width; |
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xi.height = height; |
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xi.xoffset = 0; |
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xi.format = ZPixmap; |
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xi.byte_order = ImageByteOrder (dpy); |
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xi.bitmap_unit = 0; //XY only, unused |
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xi.bitmap_bit_order = 0; //XY only, unused |
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xi.bitmap_pad = BitmapPad (dpy); |
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xi.depth = 32; |
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xi.bytes_per_line = 0; |
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xi.bits_per_pixel = 32; //Z only |
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xi.red_mask = 0x00000000; //Z only, unused |
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xi.green_mask = 0x00000000; //Z only, unused |
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xi.blue_mask = 0x00000000; //Z only, unused |
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xi.obdata = 0; // probably unused |
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|
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bool byte_order_mismatch = byte_order != xi.byte_order; |
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|
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if (!XInitImage (&xi)) |
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rxvt_fatal ("unable to initialise ximage, please report.\n"); |
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|
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if (height > INT_MAX / xi.bytes_per_line) |
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rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n"); |
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|
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xi.data = (char *)rxvt_malloc (height * xi.bytes_per_line); |
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|
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int rowstride = gdk_pixbuf_get_rowstride (pb); |
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bool pb_has_alpha = gdk_pixbuf_get_has_alpha (pb); |
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unsigned char *row = gdk_pixbuf_get_pixels (pb); |
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|
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char *line = xi.data; |
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|
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for (int y = 0; y < height; y++) |
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{ |
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unsigned char *src = row; |
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uint32_t *dst = (uint32_t *)line; |
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|
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for (int x = 0; x < width; x++) |
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{ |
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uint8_t r = *src++; |
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uint8_t g = *src++; |
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uint8_t b = *src++; |
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uint8_t a = *src; |
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|
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// this is done so it can be jump-free, but newer gcc's clone inner the loop |
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a = pb_has_alpha ? a : 255; |
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src += pb_has_alpha; |
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|
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r = (r * a + 127) / 255; |
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g = (g * a + 127) / 255; |
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b = (b * a + 127) / 255; |
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|
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uint32_t v = (a << 24) | (r << 16) | (g << 8) | b; |
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|
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if (ecb_big_endian () ? !byte_order_mismatch : byte_order_mismatch) |
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v = ecb_bswap32 (v); |
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|
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*dst++ = v; |
| 382 |
} |
| 383 |
|
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row += rowstride; |
| 385 |
line += xi.bytes_per_line; |
| 386 |
} |
| 387 |
|
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rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, PictStandardARGB32), 0, 0, width, height); |
| 389 |
img->alloc (); |
| 390 |
|
| 391 |
GC gc = XCreateGC (dpy, img->pm, 0, 0); |
| 392 |
XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height); |
| 393 |
XFreeGC (dpy, gc); |
| 394 |
|
| 395 |
free (xi.data); |
| 396 |
|
| 397 |
return img; |
| 398 |
} |
| 399 |
|
| 400 |
rxvt_img * |
| 401 |
rxvt_img::new_from_file (rxvt_screen *s, const char *filename) |
| 402 |
{ |
| 403 |
GError *err; |
| 404 |
GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err); |
| 405 |
|
| 406 |
if (!pb) |
| 407 |
try |
| 408 |
{ |
| 409 |
rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message); |
| 410 |
} |
| 411 |
catch (...) |
| 412 |
{ |
| 413 |
g_error_free (err); |
| 414 |
throw; |
| 415 |
} |
| 416 |
|
| 417 |
rxvt_img *img = new_from_pixbuf (s, pb); |
| 418 |
|
| 419 |
g_object_unref (pb); |
| 420 |
|
| 421 |
return img; |
| 422 |
} |
| 423 |
|
| 424 |
# endif |
| 425 |
|
| 426 |
void |
| 427 |
rxvt_img::destroy () |
| 428 |
{ |
| 429 |
if (--ref->cnt) |
| 430 |
return; |
| 431 |
|
| 432 |
if (pm && ref->ours) |
| 433 |
XFreePixmap (d->dpy, pm); |
| 434 |
|
| 435 |
delete ref; |
| 436 |
} |
| 437 |
|
| 438 |
rxvt_img::~rxvt_img () |
| 439 |
{ |
| 440 |
destroy (); |
| 441 |
} |
| 442 |
|
| 443 |
void |
| 444 |
rxvt_img::alloc () |
| 445 |
{ |
| 446 |
pm = XCreatePixmap (d->dpy, d->root, w, h, format->depth); |
| 447 |
ref = new pixref (w, h); |
| 448 |
} |
| 449 |
|
| 450 |
rxvt_img * |
| 451 |
rxvt_img::new_empty () |
| 452 |
{ |
| 453 |
rxvt_img *img = new rxvt_img (d, format, x, y, w, h, repeat); |
| 454 |
img->alloc (); |
| 455 |
|
| 456 |
return img; |
| 457 |
} |
| 458 |
|
| 459 |
Picture |
| 460 |
rxvt_img::picture () |
| 461 |
{ |
| 462 |
Display *dpy = d->dpy; |
| 463 |
|
| 464 |
XRenderPictureAttributes pa; |
| 465 |
pa.repeat = repeat; |
| 466 |
Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa); |
| 467 |
|
| 468 |
return pic; |
| 469 |
} |
| 470 |
|
| 471 |
void |
| 472 |
rxvt_img::unshare () |
| 473 |
{ |
| 474 |
if (ref->cnt == 1 && ref->ours) |
| 475 |
return; |
| 476 |
|
| 477 |
Pixmap pm2 = XCreatePixmap (d->dpy, d->root, ref->w, ref->h, format->depth); |
| 478 |
GC gc = XCreateGC (d->dpy, pm, 0, 0); |
| 479 |
XCopyArea (d->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0); |
| 480 |
XFreeGC (d->dpy, gc); |
| 481 |
|
| 482 |
destroy (); |
| 483 |
|
| 484 |
pm = pm2; |
| 485 |
ref = new pixref (ref->w, ref->h); |
| 486 |
} |
| 487 |
|
| 488 |
void |
| 489 |
rxvt_img::fill (const rgba &c, int x, int y, int w, int h) |
| 490 |
{ |
| 491 |
XRenderColor rc = { c.r, c.g, c.b, c.a }; |
| 492 |
|
| 493 |
Display *dpy = d->dpy; |
| 494 |
Picture src = picture (); |
| 495 |
XRenderFillRectangle (dpy, PictOpSrc, src, &rc, x, y, w, h); |
| 496 |
XRenderFreePicture (dpy, src); |
| 497 |
} |
| 498 |
|
| 499 |
void |
| 500 |
rxvt_img::fill (const rgba &c) |
| 501 |
{ |
| 502 |
fill (c, 0, 0, w, h); |
| 503 |
} |
| 504 |
|
| 505 |
void |
| 506 |
rxvt_img::add_alpha () |
| 507 |
{ |
| 508 |
if (format->direct.alphaMask) |
| 509 |
return; |
| 510 |
|
| 511 |
composer cc (this, new rxvt_img (d, find_alpha_format_for (d->dpy, format), x, y, w, h, repeat)); |
| 512 |
|
| 513 |
XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w, h); |
| 514 |
|
| 515 |
rxvt_img *img = cc; |
| 516 |
|
| 517 |
::swap (img->ref, ref); |
| 518 |
::swap (img->pm , pm ); |
| 519 |
|
| 520 |
delete img; |
| 521 |
} |
| 522 |
|
| 523 |
static void |
| 524 |
get_gaussian_kernel (int radius, int width, nv *kernel, XFixed *params) |
| 525 |
{ |
| 526 |
nv sigma = radius / 2.0; |
| 527 |
nv scale = sqrt (2.0 * M_PI) * sigma; |
| 528 |
nv sum = 0.0; |
| 529 |
|
| 530 |
for (int i = 0; i < width; i++) |
| 531 |
{ |
| 532 |
nv x = i - width / 2; |
| 533 |
kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale; |
| 534 |
sum += kernel[i]; |
| 535 |
} |
| 536 |
|
| 537 |
params[0] = XDoubleToFixed (width); |
| 538 |
params[1] = XDoubleToFixed (1); |
| 539 |
|
| 540 |
for (int i = 0; i < width; i++) |
| 541 |
params[i+2] = XDoubleToFixed (kernel[i] / sum); |
| 542 |
} |
| 543 |
|
| 544 |
rxvt_img * |
| 545 |
rxvt_img::blur (int rh, int rv) |
| 546 |
{ |
| 547 |
if (!(d->flags & DISPLAY_HAS_RENDER_CONV)) |
| 548 |
return clone (); |
| 549 |
|
| 550 |
Display *dpy = d->dpy; |
| 551 |
int size = max (rh, rv) * 2 + 1; |
| 552 |
nv *kernel = (nv *)malloc (size * sizeof (nv)); |
| 553 |
XFixed *params = rxvt_temp_buf<XFixed> (size + 2); |
| 554 |
rxvt_img *img = new_empty (); |
| 555 |
|
| 556 |
XRenderPictureAttributes pa; |
| 557 |
pa.repeat = RepeatPad; |
| 558 |
Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa); |
| 559 |
Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0); |
| 560 |
|
| 561 |
Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth); |
| 562 |
Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa); |
| 563 |
XFreePixmap (dpy, tmp_pm); |
| 564 |
|
| 565 |
if (kernel && params) |
| 566 |
{ |
| 567 |
size = rh * 2 + 1; |
| 568 |
get_gaussian_kernel (rh, size, kernel, params); |
| 569 |
|
| 570 |
XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2); |
| 571 |
XRenderComposite (dpy, |
| 572 |
PictOpSrc, |
| 573 |
src, |
| 574 |
None, |
| 575 |
tmp, |
| 576 |
0, 0, |
| 577 |
0, 0, |
| 578 |
0, 0, |
| 579 |
w, h); |
| 580 |
|
| 581 |
size = rv * 2 + 1; |
| 582 |
get_gaussian_kernel (rv, size, kernel, params); |
| 583 |
::swap (params[0], params[1]); |
| 584 |
|
| 585 |
XRenderSetPictureFilter (dpy, tmp, FilterConvolution, params, size+2); |
| 586 |
XRenderComposite (dpy, |
| 587 |
PictOpSrc, |
| 588 |
tmp, |
| 589 |
None, |
| 590 |
dst, |
| 591 |
0, 0, |
| 592 |
0, 0, |
| 593 |
0, 0, |
| 594 |
w, h); |
| 595 |
} |
| 596 |
|
| 597 |
free (kernel); |
| 598 |
|
| 599 |
XRenderFreePicture (dpy, src); |
| 600 |
XRenderFreePicture (dpy, dst); |
| 601 |
XRenderFreePicture (dpy, tmp); |
| 602 |
|
| 603 |
return img; |
| 604 |
} |
| 605 |
|
| 606 |
rxvt_img * |
| 607 |
rxvt_img::muladd (nv mul, nv add) |
| 608 |
{ |
| 609 |
// STEP 1: double the image width, fill all odd columns with white (==1) |
| 610 |
|
| 611 |
composer cc (this, new rxvt_img (d, format, 0, 0, w * 2, h, repeat)); |
| 612 |
|
| 613 |
// why the hell does XRenderSetPictureTransform want a writable matrix :( |
| 614 |
// that keeps us from just static const'ing this matrix. |
| 615 |
XTransform h_double = { |
| 616 |
0x08000, 0, 0, |
| 617 |
0, 0x10000, 0, |
| 618 |
0, 0, 0x10000 |
| 619 |
}; |
| 620 |
|
| 621 |
XRenderSetPictureFilter (cc.dpy, cc.src, "nearest", 0, 0); |
| 622 |
XRenderSetPictureTransform (cc.dpy, cc.src, &h_double); |
| 623 |
XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w * 2, h); |
| 624 |
|
| 625 |
cc.mask (false, 2, 1); |
| 626 |
|
| 627 |
static const XRenderColor c0 = { 0, 0, 0, 0 }; |
| 628 |
XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &c0, 0, 0, 1, 1); |
| 629 |
static const XRenderColor c1 = { 65535, 65535, 65535, 65535 }; |
| 630 |
XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &c1, 1, 0, 1, 1); |
| 631 |
|
| 632 |
Picture white = XRenderCreateSolidFill (cc.dpy, &c1); |
| 633 |
|
| 634 |
XRenderComposite (cc.dpy, PictOpOver, white, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w * 2, h); |
| 635 |
|
| 636 |
XRenderFreePicture (cc.dpy, white); |
| 637 |
|
| 638 |
// STEP 2: convolve the image with a 3x1 filter |
| 639 |
// a 2x1 filter would obviously suffice, but given the total lack of specification |
| 640 |
// for xrender, I expect different xrender implementations to randomly diverge. |
| 641 |
// we also halve the image, and hope for the best (again, for lack of specs). |
| 642 |
composer cc2 (cc.dstimg); |
| 643 |
|
| 644 |
XFixed kernel [] = { |
| 645 |
XDoubleToFixed (3), XDoubleToFixed (1), |
| 646 |
XDoubleToFixed (0), XDoubleToFixed (mul), XDoubleToFixed (add) |
| 647 |
}; |
| 648 |
|
| 649 |
XTransform h_halve = { |
| 650 |
0x20000, 0, 0, |
| 651 |
0, 0x10000, 0, |
| 652 |
0, 0, 0x10000 |
| 653 |
}; |
| 654 |
|
| 655 |
XRenderSetPictureFilter (cc.dpy, cc2.src, "nearest", 0, 0); |
| 656 |
XRenderSetPictureTransform (cc.dpy, cc2.src, &h_halve); |
| 657 |
XRenderSetPictureFilter (cc.dpy, cc2.src, FilterConvolution, kernel, ecb_array_length (kernel)); |
| 658 |
|
| 659 |
XRenderComposite (cc.dpy, PictOpSrc, cc2.src, None, cc2.dst, 0, 0, 0, 0, 0, 0, w * 2, h); |
| 660 |
|
| 661 |
return cc2; |
| 662 |
} |
| 663 |
|
| 664 |
ecb_noinline static void |
| 665 |
extract (int32_t cl0, int32_t cl1, int32_t &c, unsigned short &xc) |
| 666 |
{ |
| 667 |
int32_t x = clamp (c, cl0, cl1); |
| 668 |
c -= x; |
| 669 |
xc = x; |
| 670 |
} |
| 671 |
|
| 672 |
ecb_noinline static bool |
| 673 |
extract (int32_t cl0, int32_t cl1, int32_t &r, int32_t &g, int32_t &b, int32_t &a, unsigned short &xr, unsigned short &xg, unsigned short &xb, unsigned short &xa) |
| 674 |
{ |
| 675 |
extract (cl0, cl1, r, xr); |
| 676 |
extract (cl0, cl1, g, xg); |
| 677 |
extract (cl0, cl1, b, xb); |
| 678 |
extract (cl0, cl1, a, xa); |
| 679 |
|
| 680 |
return xr | xg | xb | xa; |
| 681 |
} |
| 682 |
|
| 683 |
void |
| 684 |
rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a) |
| 685 |
{ |
| 686 |
unshare (); |
| 687 |
|
| 688 |
Display *dpy = d->dpy; |
| 689 |
Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); |
| 690 |
|
| 691 |
// loop should not be needed for brightness, as only -1..1 makes sense |
| 692 |
//while (r | g | b | a) |
| 693 |
{ |
| 694 |
unsigned short xr, xg, xb, xa; |
| 695 |
XRenderColor mask_c; |
| 696 |
|
| 697 |
if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha)) |
| 698 |
XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h); |
| 699 |
|
| 700 |
if (extract (-65535, 0, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha)) |
| 701 |
{ |
| 702 |
XRenderColor mask_w = { 65535, 65535, 65535, 65535 }; |
| 703 |
XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h); |
| 704 |
mask_c.red = -mask_c.red; //TODO: verify that doing clamp, assign, and negation does the right thing |
| 705 |
mask_c.green = -mask_c.green; |
| 706 |
mask_c.blue = -mask_c.blue; |
| 707 |
mask_c.alpha = -mask_c.alpha; |
| 708 |
XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h); |
| 709 |
XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h); |
| 710 |
} |
| 711 |
} |
| 712 |
|
| 713 |
XRenderFreePicture (dpy, dst); |
| 714 |
} |
| 715 |
|
| 716 |
void |
| 717 |
rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a) |
| 718 |
{ |
| 719 |
if (r < 0 || g < 0 || b < 0 || a < 0) |
| 720 |
rxvt_fatal ("rxvt_img::contrast does not support negative values.\n"); |
| 721 |
|
| 722 |
// premultiply (yeah, these are not exact, sue me or fix it) |
| 723 |
r = (r * (a >> 8)) >> 8; |
| 724 |
g = (g * (a >> 8)) >> 8; |
| 725 |
b = (b * (a >> 8)) >> 8; |
| 726 |
|
| 727 |
composer cc (this); |
| 728 |
rxvt_img *img = cc; |
| 729 |
img->fill (rgba (0, 0, 0, 0)); |
| 730 |
|
| 731 |
cc.mask (true); |
| 732 |
|
| 733 |
//TODO: this operator does not yet implement some useful contrast |
| 734 |
while (r | g | b | a) |
| 735 |
{ |
| 736 |
unsigned short xr, xg, xb, xa; |
| 737 |
XRenderColor mask_c; |
| 738 |
|
| 739 |
if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha)) |
| 740 |
{ |
| 741 |
XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &mask_c, 0, 0, 1, 1); |
| 742 |
XRenderComposite (cc.dpy, PictOpAdd, cc.src, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w, h); |
| 743 |
} |
| 744 |
} |
| 745 |
|
| 746 |
::swap (img->ref, ref); |
| 747 |
::swap (img->pm , pm ); |
| 748 |
|
| 749 |
delete img; |
| 750 |
} |
| 751 |
|
| 752 |
void |
| 753 |
rxvt_img::draw (rxvt_img *img, int op, nv mask) |
| 754 |
{ |
| 755 |
unshare (); |
| 756 |
|
| 757 |
composer cc (img, this); |
| 758 |
|
| 759 |
if (mask != 1.) |
| 760 |
cc.mask (rgba (0, 0, 0, float_to_component (mask))); |
| 761 |
|
| 762 |
XRenderComposite (cc.dpy, op, cc.src, cc.msk, cc.dst, x - img->x, y - img->y, 0, 0, 0, 0, w, h); |
| 763 |
} |
| 764 |
|
| 765 |
rxvt_img * |
| 766 |
rxvt_img::clone () |
| 767 |
{ |
| 768 |
return new rxvt_img (*this); |
| 769 |
} |
| 770 |
|
| 771 |
rxvt_img * |
| 772 |
rxvt_img::reify () |
| 773 |
{ |
| 774 |
if (x == 0 && y == 0 && w == ref->w && h == ref->h) |
| 775 |
return clone (); |
| 776 |
|
| 777 |
// add an alpha channel if... |
| 778 |
bool alpha = !format->direct.alphaMask // pixmap has none yet |
| 779 |
&& (x || y) // we need one because of non-zero offset |
| 780 |
&& repeat == RepeatNone; // and we have no good pixels to fill with |
| 781 |
|
| 782 |
composer cc (this, new rxvt_img (d, alpha ? find_alpha_format_for (d->dpy, format) : format, |
| 783 |
0, 0, w, h, repeat)); |
| 784 |
|
| 785 |
if (repeat == RepeatNone) |
| 786 |
{ |
| 787 |
XRenderColor rc = { 0, 0, 0, 0 }; |
| 788 |
XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles |
| 789 |
XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, x, y, ref->w, ref->h); |
| 790 |
} |
| 791 |
else |
| 792 |
XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, -x, -y, 0, 0, 0, 0, w, h); |
| 793 |
|
| 794 |
return cc; |
| 795 |
} |
| 796 |
|
| 797 |
rxvt_img * |
| 798 |
rxvt_img::sub_rect (int x, int y, int width, int height) |
| 799 |
{ |
| 800 |
rxvt_img *img = clone (); |
| 801 |
|
| 802 |
img->x -= x; |
| 803 |
img->y -= y; |
| 804 |
|
| 805 |
if (w != width || h != height) |
| 806 |
{ |
| 807 |
img->w = width; |
| 808 |
img->h = height; |
| 809 |
|
| 810 |
rxvt_img *img2 = img->reify (); |
| 811 |
delete img; |
| 812 |
img = img2; |
| 813 |
} |
| 814 |
|
| 815 |
return img; |
| 816 |
} |
| 817 |
|
| 818 |
rxvt_img * |
| 819 |
rxvt_img::transform (const nv matrix[3][3]) |
| 820 |
{ |
| 821 |
return transform (mat3x3 (&matrix[0][0])); |
| 822 |
} |
| 823 |
|
| 824 |
rxvt_img * |
| 825 |
rxvt_img::transform (const nv *matrix) |
| 826 |
{ |
| 827 |
mat3x3 m (matrix); |
| 828 |
|
| 829 |
// calculate new pixel bounding box coordinates |
| 830 |
nv rmin[2], rmax[2]; |
| 831 |
|
| 832 |
for (int i = 0; i < 2; ++i) |
| 833 |
{ |
| 834 |
nv v; |
| 835 |
|
| 836 |
v = m.apply1 (i, 0+x, 0+y); rmin [i] = rmax [i] = v; |
| 837 |
v = m.apply1 (i, w+x, 0+y); min_it (rmin [i], v); max_it (rmax [i], v); |
| 838 |
v = m.apply1 (i, 0+x, h+y); min_it (rmin [i], v); max_it (rmax [i], v); |
| 839 |
v = m.apply1 (i, w+x, h+y); min_it (rmin [i], v); max_it (rmax [i], v); |
| 840 |
} |
| 841 |
|
| 842 |
float sx = rmin [0] - x; |
| 843 |
float sy = rmin [1] - y; |
| 844 |
|
| 845 |
// TODO: adjust matrix for subpixel accuracy |
| 846 |
int nx = floor (rmin [0]); |
| 847 |
int ny = floor (rmin [1]); |
| 848 |
|
| 849 |
int new_width = ceil (rmax [0] - rmin [0]); |
| 850 |
int new_height = ceil (rmax [1] - rmin [1]); |
| 851 |
|
| 852 |
mat3x3 inv = (mat3x3::translate (-x, -y) * m * mat3x3::translate (x, y)).inverse (); |
| 853 |
|
| 854 |
composer cc (this, new rxvt_img (d, format, nx, ny, new_width, new_height, repeat)); |
| 855 |
|
| 856 |
XTransform xfrm; |
| 857 |
|
| 858 |
for (int i = 0; i < 3; ++i) |
| 859 |
for (int j = 0; j < 3; ++j) |
| 860 |
xfrm.matrix [i][j] = XDoubleToFixed (inv [i][j]); |
| 861 |
|
| 862 |
XRenderSetPictureFilter (cc.dpy, cc.src, "good", 0, 0); |
| 863 |
XRenderSetPictureTransform (cc.dpy, cc.src, &xfrm); |
| 864 |
XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, sx, sy, 0, 0, 0, 0, new_width, new_height); |
| 865 |
|
| 866 |
return cc; |
| 867 |
} |
| 868 |
|
| 869 |
rxvt_img * |
| 870 |
rxvt_img::scale (int new_width, int new_height) |
| 871 |
{ |
| 872 |
if (w == new_width && h == new_height) |
| 873 |
return clone (); |
| 874 |
|
| 875 |
int old_repeat_mode = repeat; |
| 876 |
repeat = RepeatPad; // not right, but xrender can't properly scale it seems |
| 877 |
|
| 878 |
rxvt_img *img = transform (mat3x3::scale (new_width / (nv)w, new_height / (nv)h)); |
| 879 |
|
| 880 |
repeat = old_repeat_mode; |
| 881 |
img->repeat = repeat; |
| 882 |
|
| 883 |
return img; |
| 884 |
} |
| 885 |
|
| 886 |
rxvt_img * |
| 887 |
rxvt_img::rotate (int cx, int cy, nv phi) |
| 888 |
{ |
| 889 |
move (-cx, -cy); |
| 890 |
rxvt_img *img = transform (mat3x3::rotate (phi)); |
| 891 |
move ( cx, cy); |
| 892 |
img->move (cx, cy); |
| 893 |
|
| 894 |
return img; |
| 895 |
} |
| 896 |
|
| 897 |
rxvt_img * |
| 898 |
rxvt_img::convert_format (XRenderPictFormat *new_format, const rgba &bg) |
| 899 |
{ |
| 900 |
if (new_format == format) |
| 901 |
return clone (); |
| 902 |
|
| 903 |
composer cc (this, new rxvt_img (d, new_format, x, y, w, h, repeat)); |
| 904 |
|
| 905 |
int op = PictOpSrc; |
| 906 |
|
| 907 |
if (format->direct.alphaMask && !new_format->direct.alphaMask) |
| 908 |
{ |
| 909 |
// does it have to be that complicated |
| 910 |
XRenderColor rc = { bg.r, bg.g, bg.b, bg.a }; |
| 911 |
XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h); |
| 912 |
|
| 913 |
op = PictOpOver; |
| 914 |
} |
| 915 |
|
| 916 |
XRenderComposite (cc.dpy, op, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w, h); |
| 917 |
|
| 918 |
return cc; |
| 919 |
} |
| 920 |
|
| 921 |
rxvt_img * |
| 922 |
rxvt_img::tint (const rgba &c) |
| 923 |
{ |
| 924 |
composer cc (this); |
| 925 |
cc.mask (true); |
| 926 |
cc.fill (c); |
| 927 |
|
| 928 |
XRenderComposite (cc.dpy, PictOpSrc, cc.src, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w, h); |
| 929 |
|
| 930 |
return cc; |
| 931 |
} |
| 932 |
|
| 933 |
rxvt_img * |
| 934 |
rxvt_img::shade (nv factor, rgba c) |
| 935 |
{ |
| 936 |
clamp_it (factor, -1., 1.); |
| 937 |
factor++; |
| 938 |
|
| 939 |
if (factor > 1) |
| 940 |
{ |
| 941 |
c.r = c.r * (2 - factor); |
| 942 |
c.g = c.g * (2 - factor); |
| 943 |
c.b = c.b * (2 - factor); |
| 944 |
} |
| 945 |
else |
| 946 |
{ |
| 947 |
c.r = c.r * factor; |
| 948 |
c.g = c.g * factor; |
| 949 |
c.b = c.b * factor; |
| 950 |
} |
| 951 |
|
| 952 |
rxvt_img *img = this->tint (c); |
| 953 |
|
| 954 |
if (factor > 1) |
| 955 |
{ |
| 956 |
c.a = 0xffff; |
| 957 |
c.r = |
| 958 |
c.g = |
| 959 |
c.b = 0xffff * (factor - 1); |
| 960 |
|
| 961 |
img->brightness (c.r, c.g, c.b, c.a); |
| 962 |
} |
| 963 |
|
| 964 |
return img; |
| 965 |
} |
| 966 |
|
| 967 |
rxvt_img * |
| 968 |
rxvt_img::filter (const char *name, int nparams, nv *params) |
| 969 |
{ |
| 970 |
composer cc (this); |
| 971 |
|
| 972 |
XFixed *xparams = rxvt_temp_buf<XFixed> (nparams); |
| 973 |
|
| 974 |
for (int i = 0; i < nparams; ++i) |
| 975 |
xparams [i] = XDoubleToFixed (params [i]); |
| 976 |
|
| 977 |
XRenderSetPictureFilter (cc.dpy, cc.src, name, xparams, nparams); |
| 978 |
|
| 979 |
XRenderComposite (cc.dpy, PictOpSrc, cc.src, 0, cc.dst, 0, 0, 0, 0, 0, 0, w, h); |
| 980 |
|
| 981 |
return cc; |
| 982 |
} |
| 983 |
|
| 984 |
#endif |
| 985 |
|
