picom/src/config.c

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#include <stdlib.h>
#include <stdbool.h>
#include "common.h"
#include "config.h"
#include "utils.h"
#include "c2.h"
/**
* Parse a long number.
*/
bool
parse_long(const char *s, long *dest) {
const char *endptr = NULL;
long val = strtol(s, (char **) &endptr, 0);
if (!endptr || endptr == s) {
printf_errf("(\"%s\"): Invalid number.", s);
return false;
}
while (isspace(*endptr))
++endptr;
if (*endptr) {
printf_errf("(\"%s\"): Trailing characters.", s);
return false;
}
*dest = val;
return true;
}
/**
* Parse a floating-point number in matrix.
*/
const char *
parse_matrix_readnum(const char *src, double *dest) {
char *pc = NULL;
double val = strtod(src, &pc);
if (!pc || pc == src) {
printf_errf("(\"%s\"): No number found.", src);
return src;
}
while (*pc && (isspace(*pc) || ',' == *pc))
++pc;
*dest = val;
return pc;
}
/**
* Parse a matrix.
*/
xcb_render_fixed_t *
parse_matrix(session_t *ps, const char *src, const char **endptr) {
int wid = 0, hei = 0;
const char *pc = NULL;
xcb_render_fixed_t *matrix = NULL;
// Get matrix width and height
{
double val = 0.0;
if (src == (pc = parse_matrix_readnum(src, &val)))
goto parse_matrix_err;
src = pc;
wid = val;
if (src == (pc = parse_matrix_readnum(src, &val)))
goto parse_matrix_err;
src = pc;
hei = val;
}
// Validate matrix width and height
if (wid <= 0 || hei <= 0) {
printf_errf("(): Invalid matrix width/height.");
goto parse_matrix_err;
}
if (!(wid % 2 && hei % 2)) {
printf_errf("(): Width/height not odd.");
goto parse_matrix_err;
}
if (wid > 16 || hei > 16)
printf_errf("(): Matrix width/height too large, may slow down"
"rendering, and/or consume lots of memory");
// Allocate memory
matrix = calloc(wid * hei + 2, sizeof(xcb_render_fixed_t));
if (!matrix) {
printf_errf("(): Failed to allocate memory for matrix.");
goto parse_matrix_err;
}
// Read elements
{
int skip = hei / 2 * wid + wid / 2;
bool hasneg = false;
for (int i = 0; i < wid * hei; ++i) {
// Ignore the center element
if (i == skip) {
matrix[2 + i] = DOUBLE_TO_XFIXED(0);
continue;
}
double val = 0;
if (src == (pc = parse_matrix_readnum(src, &val)))
goto parse_matrix_err;
src = pc;
if (val < 0) hasneg = true;
matrix[2 + i] = DOUBLE_TO_XFIXED(val);
}
if (BKEND_XRENDER == ps->o.backend && hasneg)
printf_errf("(): A convolution kernel with negative values "
"may not work properly under X Render backend.");
}
// Detect trailing characters
for ( ;*pc && ';' != *pc; ++pc)
if (!isspace(*pc) && ',' != *pc) {
printf_errf("(): Trailing characters in matrix string.");
goto parse_matrix_err;
}
// Jump over spaces after ';'
if (';' == *pc) {
++pc;
while (*pc && isspace(*pc))
++pc;
}
// Require an end of string if endptr is not provided, otherwise
// copy end pointer to endptr
if (endptr)
*endptr = pc;
else if (*pc) {
printf_errf("(): Only one matrix expected.");
goto parse_matrix_err;
}
// Fill in width and height
matrix[0] = DOUBLE_TO_XFIXED(wid);
matrix[1] = DOUBLE_TO_XFIXED(hei);
return matrix;
parse_matrix_err:
free(matrix);
return NULL;
}
/**
* Parse a convolution kernel.
*/
xcb_render_fixed_t *
parse_conv_kern(session_t *ps, const char *src, const char **endptr) {
return parse_matrix(ps, src, endptr);
}
/**
* Parse a list of convolution kernels.
*/
bool
parse_conv_kern_lst(session_t *ps, const char *src, xcb_render_fixed_t **dest, int max) {
static const struct {
const char *name;
const char *kern_str;
} CONV_KERN_PREDEF[] = {
{ "3x3box", "3,3,1,1,1,1,1,1,1,1," },
{ "5x5box", "5,5,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1," },
{ "7x7box", "7,7,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1," },
{ "3x3gaussian", "3,3,0.243117,0.493069,0.243117,0.493069,0.493069,0.243117,0.493069,0.243117," },
{ "5x5gaussian", "5,5,0.003493,0.029143,0.059106,0.029143,0.003493,0.029143,0.243117,0.493069,0.243117,0.029143,0.059106,0.493069,0.493069,0.059106,0.029143,0.243117,0.493069,0.243117,0.029143,0.003493,0.029143,0.059106,0.029143,0.003493," },
{ "7x7gaussian", "7,7,0.000003,0.000102,0.000849,0.001723,0.000849,0.000102,0.000003,0.000102,0.003493,0.029143,0.059106,0.029143,0.003493,0.000102,0.000849,0.029143,0.243117,0.493069,0.243117,0.029143,0.000849,0.001723,0.059106,0.493069,0.493069,0.059106,0.001723,0.000849,0.029143,0.243117,0.493069,0.243117,0.029143,0.000849,0.000102,0.003493,0.029143,0.059106,0.029143,0.003493,0.000102,0.000003,0.000102,0.000849,0.001723,0.000849,0.000102,0.000003," },
{ "9x9gaussian", "9,9,0.000000,0.000000,0.000001,0.000006,0.000012,0.000006,0.000001,0.000000,0.000000,0.000000,0.000003,0.000102,0.000849,0.001723,0.000849,0.000102,0.000003,0.000000,0.000001,0.000102,0.003493,0.029143,0.059106,0.029143,0.003493,0.000102,0.000001,0.000006,0.000849,0.029143,0.243117,0.493069,0.243117,0.029143,0.000849,0.000006,0.000012,0.001723,0.059106,0.493069,0.493069,0.059106,0.001723,0.000012,0.000006,0.000849,0.029143,0.243117,0.493069,0.243117,0.029143,0.000849,0.000006,0.000001,0.000102,0.003493,0.029143,0.059106,0.029143,0.003493,0.000102,0.000001,0.000000,0.000003,0.000102,0.000849,0.001723,0.000849,0.000102,0.000003,0.000000,0.000000,0.000000,0.000001,0.000006,0.000012,0.000006,0.000001,0.000000,0.000000," },
{ "11x11gaussian", "11,11,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000001,0.000006,0.000012,0.000006,0.000001,0.000000,0.000000,0.000000,0.000000,0.000000,0.000003,0.000102,0.000849,0.001723,0.000849,0.000102,0.000003,0.000000,0.000000,0.000000,0.000001,0.000102,0.003493,0.029143,0.059106,0.029143,0.003493,0.000102,0.000001,0.000000,0.000000,0.000006,0.000849,0.029143,0.243117,0.493069,0.243117,0.029143,0.000849,0.000006,0.000000,0.000000,0.000012,0.001723,0.059106,0.493069,0.493069,0.059106,0.001723,0.000012,0.000000,0.000000,0.000006,0.000849,0.029143,0.243117,0.493069,0.243117,0.029143,0.000849,0.000006,0.000000,0.000000,0.000001,0.000102,0.003493,0.029143,0.059106,0.029143,0.003493,0.000102,0.000001,0.000000,0.000000,0.000000,0.000003,0.000102,0.000849,0.001723,0.000849,0.000102,0.000003,0.000000,0.000000,0.000000,0.000000,0.000000,0.000001,0.000006,0.000012,0.000006,0.000001,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000," },
};
2018-08-22 21:25:40 +08:00
for (unsigned int i = 0;
i < sizeof(CONV_KERN_PREDEF) / sizeof(CONV_KERN_PREDEF[0]); ++i)
if (!strcmp(CONV_KERN_PREDEF[i].name, src))
return parse_conv_kern_lst(ps, CONV_KERN_PREDEF[i].kern_str, dest, max);
int i = 0;
const char *pc = src;
// Free old kernels
for (i = 0; i < max; ++i) {
free(dest[i]);
dest[i] = NULL;
}
// Continue parsing until the end of source string
i = 0;
while (pc && *pc && i < max - 1) {
if (!(dest[i++] = parse_conv_kern(ps, pc, &pc)))
return false;
}
if (*pc) {
printf_errf("(): Too many blur kernels!");
return false;
}
return true;
}
/**
* Parse a X geometry.
*
* ps->root_width and ps->root_height must be valid
*/
bool
parse_geometry(session_t *ps, const char *src, region_t *dest) {
pixman_region32_clear(dest);
if (!src)
return true;
if (!ps->root_width || !ps->root_height)
return true;
geometry_t geom = { .wid = ps->root_width, .hei = ps->root_height, .x = 0, .y = 0 };
long val = 0L;
char *endptr = NULL;
src = skip_space(src);
if (!*src)
goto parse_geometry_end;
// Parse width
// Must be base 10, because "0x0..." may appear
if (!('+' == *src || '-' == *src)) {
val = strtol(src, &endptr, 10);
assert(endptr);
if (src != endptr) {
geom.wid = val;
if (geom.wid < 0) {
printf_errf("(\"%s\"): Invalid width.", src);
return false;
}
src = endptr;
}
src = skip_space(src);
}
// Parse height
if ('x' == *src) {
++src;
val = strtol(src, &endptr, 10);
assert(endptr);
if (src != endptr) {
geom.hei = val;
if (geom.hei < 0) {
printf_errf("(\"%s\"): Invalid height.", src);
return false;
}
src = endptr;
}
src = skip_space(src);
}
// Parse x
if ('+' == *src || '-' == *src) {
val = strtol(src, &endptr, 10);
if (endptr && src != endptr) {
geom.x = val;
if (*src == '-')
geom.x += ps->root_width - geom.wid;
src = endptr;
}
src = skip_space(src);
}
// Parse y
if ('+' == *src || '-' == *src) {
val = strtol(src, &endptr, 10);
if (endptr && src != endptr) {
geom.y = val;
if (*src == '-')
geom.y += ps->root_height - geom.hei;
src = endptr;
}
src = skip_space(src);
}
if (*src) {
printf_errf("(\"%s\"): Trailing characters.", src);
return false;
}
parse_geometry_end:
pixman_region32_union_rect(dest, dest, geom.x, geom.y, geom.wid, geom.hei);
return true;
}
/**
* Parse a list of opacity rules.
*/
bool parse_rule_opacity(session_t *ps, const char *src) {
// Find opacity value
char *endptr = NULL;
long val = strtol(src, &endptr, 0);
if (!endptr || endptr == src) {
printf_errf("(\"%s\"): No opacity specified?", src);
return false;
}
if (val > 100 || val < 0) {
printf_errf("(\"%s\"): Opacity %ld invalid.", src, val);
return false;
}
// Skip over spaces
while (*endptr && isspace(*endptr))
++endptr;
if (':' != *endptr) {
printf_errf("(\"%s\"): Opacity terminator not found.", src);
return false;
}
++endptr;
// Parse pattern
// I hope 1-100 is acceptable for (void *)
return c2_parsed(ps, &ps->o.opacity_rules, endptr, (void *) val);
}
/**
* Add a pattern to a condition linked list.
*/
bool
condlst_add(session_t *ps, c2_lptr_t **pcondlst, const char *pattern) {
if (!pattern)
return false;
if (!c2_parse(ps, pcondlst, pattern))
exit(1);
return true;
}