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cairo-xcb-surface-render.c
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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2009 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* Contributor(s):
* Chris Wilson <[email protected]>
*/
#include "cairoint.h"
#include "cairo-xcb-private.h"
#include "cairo-boxes-private.h"
#include "cairo-clip-inline.h"
#include "cairo-clip-private.h"
#include "cairo-composite-rectangles-private.h"
#include "cairo-image-surface-private.h"
#include "cairo-list-inline.h"
#include "cairo-region-private.h"
#include "cairo-surface-offset-private.h"
#include "cairo-surface-snapshot-inline.h"
#include "cairo-surface-subsurface-private.h"
#include "cairo-traps-private.h"
#include "cairo-recording-surface-inline.h"
#include "cairo-paginated-private.h"
#include "cairo-pattern-inline.h"
#define PIXMAN_MAX_INT ((pixman_fixed_1 >> 1) - pixman_fixed_e) /* need to ensure deltas also fit */
static cairo_status_t
_clip_and_composite_boxes (cairo_xcb_surface_t *dst,
cairo_operator_t op,
const cairo_pattern_t *src,
cairo_boxes_t *boxes,
cairo_composite_rectangles_t *extents);
static inline cairo_xcb_connection_t *
_picture_to_connection (cairo_xcb_picture_t *picture)
{
return (cairo_xcb_connection_t *) picture->base.device;
}
static void
_cairo_xcb_surface_ensure_picture (cairo_xcb_surface_t *surface);
static uint32_t
hars_petruska_f54_1_random (void)
{
#define rol(x,k) ((x << k) | (x >> (32-k)))
static uint32_t x;
return x = (x ^ rol (x, 5) ^ rol (x, 24)) + 0x37798849;
#undef rol
}
static cairo_status_t
_cairo_xcb_picture_finish (void *abstract_surface)
{
cairo_xcb_picture_t *surface = abstract_surface;
cairo_xcb_connection_t *connection = _picture_to_connection (surface);
cairo_status_t status;
status = _cairo_xcb_connection_acquire (connection);
cairo_list_del (&surface->link);
if (unlikely (status))
return status;
_cairo_xcb_connection_render_free_picture (connection, surface->picture);
_cairo_xcb_connection_release (connection);
return CAIRO_STATUS_SUCCESS;
}
static const cairo_surface_backend_t _cairo_xcb_picture_backend = {
CAIRO_SURFACE_TYPE_XCB,
_cairo_xcb_picture_finish,
};
static const struct xcb_render_transform_t identity_transform = {
1 << 16, 0, 0,
0, 1 << 16, 0,
0, 0, 1 << 16,
};
static cairo_xcb_picture_t *
_cairo_xcb_picture_create (cairo_xcb_screen_t *screen,
pixman_format_code_t pixman_format,
xcb_render_pictformat_t xrender_format,
int width, int height)
{
cairo_xcb_picture_t *surface;
surface = malloc (sizeof (cairo_xcb_picture_t));
if (unlikely (surface == NULL))
return (cairo_xcb_picture_t *)
_cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
_cairo_surface_init (&surface->base,
&_cairo_xcb_picture_backend,
&screen->connection->device,
_cairo_content_from_pixman_format (pixman_format));
cairo_list_add (&surface->link, &screen->pictures);
surface->screen = screen;
surface->picture = _cairo_xcb_connection_get_xid (screen->connection);
surface->pixman_format = pixman_format;
surface->xrender_format = xrender_format;
surface->x0 = surface->y0 = 0;
surface->x = surface->y = 0;
surface->width = width;
surface->height = height;
surface->transform = identity_transform;
surface->extend = CAIRO_EXTEND_NONE;
surface->filter = CAIRO_FILTER_NEAREST;
surface->has_component_alpha = FALSE;
return surface;
}
static inline cairo_bool_t
_operator_is_supported (uint32_t flags, cairo_operator_t op)
{
if (op <= CAIRO_OPERATOR_SATURATE)
return TRUE;
/* Can we use PDF operators? */
#if CAIRO_XCB_RENDER_AT_LEAST(0, 11)
if (op <= CAIRO_OPERATOR_HSL_LUMINOSITY)
return flags & CAIRO_XCB_RENDER_HAS_PDF_OPERATORS;
#endif
return FALSE;
}
static int
_render_operator (cairo_operator_t op)
{
#define C(x,y) case CAIRO_OPERATOR_##x: return XCB_RENDER_PICT_OP_##y
switch (op) {
C(CLEAR, CLEAR);
C(SOURCE, SRC);
C(OVER, OVER);
C(IN, IN);
C(OUT, OUT);
C(ATOP, ATOP);
C(DEST, DST);
C(DEST_OVER, OVER_REVERSE);
C(DEST_IN, IN_REVERSE);
C(DEST_OUT, OUT_REVERSE);
C(DEST_ATOP, ATOP_REVERSE);
C(XOR, XOR);
C(ADD, ADD);
C(SATURATE, SATURATE);
/* PDF operators were added in RENDER 0.11, check if the xcb headers have
* the defines, else fall through to the default case. */
#if CAIRO_XCB_RENDER_AT_LEAST(0, 11)
#define BLEND(x,y) C(x,y)
#else
#define BLEND(x,y) case CAIRO_OPERATOR_##x:
#endif
BLEND(MULTIPLY, MULTIPLY);
BLEND(SCREEN, SCREEN);
BLEND(OVERLAY, OVERLAY);
BLEND(DARKEN, DARKEN);
BLEND(LIGHTEN, LIGHTEN);
BLEND(COLOR_DODGE, COLOR_DODGE);
BLEND(COLOR_BURN, COLOR_BURN);
BLEND(HARD_LIGHT, HARD_LIGHT);
BLEND(SOFT_LIGHT, SOFT_LIGHT);
BLEND(DIFFERENCE, DIFFERENCE);
BLEND(EXCLUSION, EXCLUSION);
BLEND(HSL_HUE, HSL_HUE);
BLEND(HSL_SATURATION, HSL_SATURATION);
BLEND(HSL_COLOR, HSL_COLOR);
BLEND(HSL_LUMINOSITY, HSL_LUMINOSITY);
default:
ASSERT_NOT_REACHED;
return XCB_RENDER_PICT_OP_OVER;
}
}
static cairo_status_t
_cairo_xcb_surface_set_clip_region (cairo_xcb_surface_t *surface,
cairo_region_t *region)
{
xcb_rectangle_t stack_rects[CAIRO_STACK_ARRAY_LENGTH (xcb_rectangle_t)];
xcb_rectangle_t *rects = stack_rects;
int i, num_rects;
num_rects = cairo_region_num_rectangles (region);
if (num_rects > ARRAY_LENGTH (stack_rects)) {
rects = _cairo_malloc_ab (num_rects, sizeof (xcb_rectangle_t));
if (unlikely (rects == NULL)) {
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
}
for (i = 0; i < num_rects; i++) {
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (region, i, &rect);
rects[i].x = rect.x;
rects[i].y = rect.y;
rects[i].width = rect.width;
rects[i].height = rect.height;
}
_cairo_xcb_connection_render_set_picture_clip_rectangles (surface->connection,
surface->picture,
0, 0,
num_rects, rects);
if (rects != stack_rects)
free (rects);
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_xcb_surface_clear_clip_region (cairo_xcb_surface_t *surface)
{
uint32_t values[] = { XCB_NONE };
_cairo_xcb_connection_render_change_picture (surface->connection,
surface->picture,
XCB_RENDER_CP_CLIP_MASK,
values);
}
static void
_cairo_xcb_surface_set_precision (cairo_xcb_surface_t *surface,
cairo_antialias_t antialias)
{
cairo_xcb_connection_t *connection = surface->connection;
uint32_t precision;
if (connection->force_precision != -1)
precision = connection->force_precision;
else switch (antialias) {
default:
case CAIRO_ANTIALIAS_DEFAULT:
case CAIRO_ANTIALIAS_GRAY:
case CAIRO_ANTIALIAS_NONE:
case CAIRO_ANTIALIAS_FAST:
case CAIRO_ANTIALIAS_GOOD:
precision = XCB_RENDER_POLY_MODE_IMPRECISE;
break;
case CAIRO_ANTIALIAS_SUBPIXEL:
case CAIRO_ANTIALIAS_BEST:
precision = XCB_RENDER_POLY_MODE_PRECISE;
break;
}
if (surface->precision != precision) {
_cairo_xcb_connection_render_change_picture (connection,
surface->picture,
XCB_RENDER_CP_POLY_MODE,
&precision);
surface->precision = precision;
}
}
static void
_cairo_xcb_surface_ensure_picture (cairo_xcb_surface_t *surface)
{
assert (surface->fallback == NULL);
if (surface->picture == XCB_NONE) {
uint32_t values[1];
uint32_t flags = 0;
if (surface->precision != XCB_RENDER_POLY_MODE_PRECISE) {
flags |= XCB_RENDER_CP_POLY_MODE;
values[0] = surface->precision;
}
surface->picture = _cairo_xcb_connection_get_xid (surface->connection);
_cairo_xcb_connection_render_create_picture (surface->connection,
surface->picture,
surface->drawable,
surface->xrender_format,
flags, values);
}
}
static cairo_xcb_picture_t *
_picture_from_image (cairo_xcb_surface_t *target,
xcb_render_pictformat_t format,
cairo_image_surface_t *image,
cairo_xcb_shm_info_t *shm_info)
{
xcb_pixmap_t pixmap;
xcb_gcontext_t gc;
cairo_xcb_picture_t *picture;
pixmap = _cairo_xcb_connection_create_pixmap (target->connection,
image->depth,
target->drawable,
image->width, image->height);
gc = _cairo_xcb_screen_get_gc (target->screen, pixmap, image->depth);
if (shm_info != NULL) {
_cairo_xcb_connection_shm_put_image (target->connection,
pixmap, gc,
image->width, image->height,
0, 0,
image->width, image->height,
0, 0,
image->depth,
shm_info->shm,
shm_info->offset);
} else {
int len;
/* Do we need to trim the image? */
len = CAIRO_STRIDE_FOR_WIDTH_BPP (image->width, PIXMAN_FORMAT_BPP (image->pixman_format));
if (len == image->stride) {
_cairo_xcb_connection_put_image (target->connection,
pixmap, gc,
image->width, image->height,
0, 0,
image->depth,
image->stride,
image->data);
} else {
_cairo_xcb_connection_put_subimage (target->connection,
pixmap, gc,
0, 0,
image->width, image->height,
PIXMAN_FORMAT_BPP (image->pixman_format) / 8,
image->stride,
0, 0,
image->depth,
image->data);
}
}
_cairo_xcb_screen_put_gc (target->screen, image->depth, gc);
picture = _cairo_xcb_picture_create (target->screen,
image->pixman_format, format,
image->width, image->height);
if (likely (picture->base.status == CAIRO_STATUS_SUCCESS)) {
_cairo_xcb_connection_render_create_picture (target->connection,
picture->picture, pixmap, format,
0, 0);
}
_cairo_xcb_connection_free_pixmap (target->connection, pixmap);
return picture;
}
static cairo_bool_t
_pattern_is_supported (uint32_t flags,
const cairo_pattern_t *pattern)
{
if (pattern->type == CAIRO_PATTERN_TYPE_SOLID)
return TRUE;
if (! _cairo_matrix_is_integer_translation (&pattern->matrix, NULL, NULL)) {
if ((flags & CAIRO_XCB_RENDER_HAS_PICTURE_TRANSFORM) == 0)
return FALSE;
}
switch (pattern->extend) {
default:
ASSERT_NOT_REACHED;
case CAIRO_EXTEND_NONE:
case CAIRO_EXTEND_REPEAT:
break;
case CAIRO_EXTEND_PAD:
case CAIRO_EXTEND_REFLECT:
if ((flags & CAIRO_XCB_RENDER_HAS_EXTENDED_REPEAT) == 0)
return FALSE;
}
if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) {
cairo_filter_t filter;
filter = pattern->filter;
if (_cairo_matrix_has_unity_scale (&pattern->matrix) &&
_cairo_matrix_is_integer_translation (&pattern->matrix, NULL, NULL))
{
filter = CAIRO_FILTER_NEAREST;
}
if (! (filter == CAIRO_FILTER_NEAREST || filter == CAIRO_FILTER_FAST)) {
if ((flags & CAIRO_XCB_RENDER_HAS_FILTERS) == 0)
return FALSE;
}
} else { /* gradient */
if ((flags & CAIRO_XCB_RENDER_HAS_GRADIENTS) == 0)
return FALSE;
/* The RENDER specification says that the inner circle has to be
* completely contained inside the outer one. */
if (pattern->type == CAIRO_PATTERN_TYPE_RADIAL &&
! _cairo_radial_pattern_focus_is_inside ((cairo_radial_pattern_t *) pattern))
{
return FALSE;
}
}
return pattern->type != CAIRO_PATTERN_TYPE_MESH;
}
static void
_cairo_xcb_picture_set_matrix (cairo_xcb_picture_t *picture,
const cairo_matrix_t *matrix,
cairo_filter_t filter,
double xc, double yc)
{
xcb_render_transform_t transform;
pixman_transform_t *pixman_transform;
cairo_int_status_t ignored;
/* Casting between pixman_transform_t and xcb_render_transform_t is safe
* because they happen to be the exact same type.
*/
pixman_transform = (pixman_transform_t *) &transform;
picture->x = picture->x0;
picture->y = picture->y0;
ignored = _cairo_matrix_to_pixman_matrix_offset (matrix, filter, xc, yc,
pixman_transform,
&picture->x, &picture->y);
(void) ignored;
if (memcmp (&picture->transform, &transform, sizeof (xcb_render_transform_t))) {
_cairo_xcb_connection_render_set_picture_transform (_picture_to_connection (picture),
picture->picture,
&transform);
picture->transform = transform;
}
}
static void
_cairo_xcb_picture_set_filter (cairo_xcb_picture_t *picture,
cairo_filter_t filter)
{
const char *render_filter;
int len;
if (picture->filter == filter)
return;
switch (filter) {
case CAIRO_FILTER_FAST:
render_filter = "fast";
len = strlen ("fast");
break;
case CAIRO_FILTER_GOOD:
render_filter = "good";
len = strlen ("good");
break;
case CAIRO_FILTER_BEST:
render_filter = "best";
len = strlen ("best");
break;
case CAIRO_FILTER_NEAREST:
render_filter = "nearest";
len = strlen ("nearest");
break;
case CAIRO_FILTER_BILINEAR:
render_filter = "bilinear";
len = strlen ("bilinear");
break;
default:
ASSERT_NOT_REACHED;
case CAIRO_FILTER_GAUSSIAN:
render_filter = "best";
len = strlen ("best");
break;
}
_cairo_xcb_connection_render_set_picture_filter (_picture_to_connection (picture),
picture->picture,
len, (char *) render_filter);
picture->filter = filter;
}
static void
_cairo_xcb_picture_set_extend (cairo_xcb_picture_t *picture,
cairo_extend_t extend)
{
uint32_t pa[1];
if (picture->extend == extend)
return;
switch (extend) {
default:
ASSERT_NOT_REACHED;
case CAIRO_EXTEND_NONE:
pa[0] = XCB_RENDER_REPEAT_NONE;
break;
case CAIRO_EXTEND_REPEAT:
pa[0] = XCB_RENDER_REPEAT_NORMAL;
break;
case CAIRO_EXTEND_REFLECT:
pa[0] = XCB_RENDER_REPEAT_REFLECT;
break;
case CAIRO_EXTEND_PAD:
pa[0] = XCB_RENDER_REPEAT_PAD;
break;
}
_cairo_xcb_connection_render_change_picture (_picture_to_connection (picture),
picture->picture,
XCB_RENDER_CP_REPEAT, pa);
picture->extend = extend;
}
static void
_cairo_xcb_picture_set_component_alpha (cairo_xcb_picture_t *picture,
cairo_bool_t ca)
{
uint32_t pa[1];
if (picture->has_component_alpha == ca)
return;
pa[0] = ca;
_cairo_xcb_connection_render_change_picture (_picture_to_connection (picture),
picture->picture,
XCB_RENDER_CP_COMPONENT_ALPHA,
pa);
picture->has_component_alpha = ca;
}
static cairo_xcb_picture_t *
_solid_picture (cairo_xcb_surface_t *target,
const cairo_color_t *color)
{
xcb_render_color_t xcb_color;
xcb_render_pictformat_t xrender_format;
cairo_xcb_picture_t *picture;
xcb_color.red = color->red_short;
xcb_color.green = color->green_short;
xcb_color.blue = color->blue_short;
xcb_color.alpha = color->alpha_short;
xrender_format = target->screen->connection->standard_formats[CAIRO_FORMAT_ARGB32];
picture = _cairo_xcb_picture_create (target->screen,
PIXMAN_a8r8g8b8,
xrender_format,
-1, -1);
if (unlikely (picture->base.status))
return picture;
if (target->connection->flags & CAIRO_XCB_RENDER_HAS_GRADIENTS) {
_cairo_xcb_connection_render_create_solid_fill (target->connection,
picture->picture,
xcb_color);
} else {
xcb_pixmap_t pixmap;
uint32_t values[] = { XCB_RENDER_REPEAT_NORMAL };
pixmap = _cairo_xcb_connection_create_pixmap (target->connection,
32, target->drawable, 1, 1);
_cairo_xcb_connection_render_create_picture (target->connection,
picture->picture,
pixmap,
xrender_format,
XCB_RENDER_CP_REPEAT,
values);
if (target->connection->flags & CAIRO_XCB_RENDER_HAS_FILL_RECTANGLES) {
xcb_rectangle_t rect;
rect.x = rect.y = 0;
rect.width = rect.height = 1;
_cairo_xcb_connection_render_fill_rectangles (_picture_to_connection (picture),
XCB_RENDER_PICT_OP_SRC,
picture->picture,
xcb_color, 1, &rect);
} else {
xcb_gcontext_t gc;
uint32_t pixel;
gc = _cairo_xcb_screen_get_gc (target->screen, pixmap, 32);
/* XXX byte ordering? */
pixel = ((color->alpha_short >> 8) << 24) |
((color->red_short >> 8) << 16) |
((color->green_short >> 8) << 8) |
((color->blue_short >> 8) << 0);
_cairo_xcb_connection_put_image (target->connection,
pixmap, gc,
1, 1, 0, 0,
32, 4, &pixel);
_cairo_xcb_screen_put_gc (target->screen, 32, gc);
}
_cairo_xcb_connection_free_pixmap (target->connection, pixmap);
}
return picture;
}
static cairo_xcb_picture_t *
_cairo_xcb_transparent_picture (cairo_xcb_surface_t *target)
{
cairo_xcb_picture_t *picture;
picture = (cairo_xcb_picture_t *) target->screen->stock_colors[CAIRO_STOCK_TRANSPARENT];
if (picture == NULL) {
picture = _solid_picture (target, CAIRO_COLOR_TRANSPARENT);
target->screen->stock_colors[CAIRO_STOCK_TRANSPARENT] = &picture->base;
}
return (cairo_xcb_picture_t *) cairo_surface_reference (&picture->base);
}
static cairo_xcb_picture_t *
_cairo_xcb_black_picture (cairo_xcb_surface_t *target)
{
cairo_xcb_picture_t *picture;
picture = (cairo_xcb_picture_t *) target->screen->stock_colors[CAIRO_STOCK_BLACK];
if (picture == NULL) {
picture = _solid_picture (target, CAIRO_COLOR_BLACK);
target->screen->stock_colors[CAIRO_STOCK_BLACK] = &picture->base;
}
return (cairo_xcb_picture_t *) cairo_surface_reference (&picture->base);
}
static cairo_xcb_picture_t *
_cairo_xcb_white_picture (cairo_xcb_surface_t *target)
{
cairo_xcb_picture_t *picture;
picture = (cairo_xcb_picture_t *) target->screen->stock_colors[CAIRO_STOCK_WHITE];
if (picture == NULL) {
picture = _solid_picture (target, CAIRO_COLOR_WHITE);
target->screen->stock_colors[CAIRO_STOCK_WHITE] = &picture->base;
}
return (cairo_xcb_picture_t *) cairo_surface_reference (&picture->base);
}
static cairo_xcb_picture_t *
_cairo_xcb_solid_picture (cairo_xcb_surface_t *target,
const cairo_solid_pattern_t *pattern)
{
cairo_xcb_picture_t *picture;
cairo_xcb_screen_t *screen;
int i, n_cached;
if (pattern->color.alpha_short <= 0x00ff)
return _cairo_xcb_transparent_picture (target);
if (pattern->color.alpha_short >= 0xff00) {
if (pattern->color.red_short <= 0x00ff &&
pattern->color.green_short <= 0x00ff &&
pattern->color.blue_short <= 0x00ff)
{
return _cairo_xcb_black_picture (target);
}
if (pattern->color.red_short >= 0xff00 &&
pattern->color.green_short >= 0xff00 &&
pattern->color.blue_short >= 0xff00)
{
return _cairo_xcb_white_picture (target);
}
}
screen = target->screen;
n_cached = screen->solid_cache_size;
for (i = 0; i < n_cached; i++) {
if (_cairo_color_equal (&screen->solid_cache[i].color, &pattern->color)) {
return (cairo_xcb_picture_t *) cairo_surface_reference (screen->solid_cache[i].picture);
}
}
picture = _solid_picture (target, &pattern->color);
if (unlikely (picture->base.status))
return picture;
if (screen->solid_cache_size < ARRAY_LENGTH (screen->solid_cache)) {
i = screen->solid_cache_size++;
} else {
i = hars_petruska_f54_1_random () % ARRAY_LENGTH (screen->solid_cache);
cairo_surface_destroy (screen->solid_cache[i].picture);
}
screen->solid_cache[i].picture = cairo_surface_reference (&picture->base);
screen->solid_cache[i].color = pattern->color;
return picture;
}
static cairo_xcb_picture_t *
_render_to_picture (cairo_xcb_surface_t *target,
const cairo_pattern_t *pattern,
const cairo_rectangle_int_t *extents)
{
cairo_image_surface_t *image;
cairo_xcb_shm_info_t *shm_info;
cairo_pattern_union_t copy;
cairo_status_t status;
cairo_xcb_picture_t *picture;
pixman_format_code_t pixman_format;
xcb_render_pictformat_t xrender_format;
/* XXX handle extend modes via tiling? */
/* XXX alpha-only masks? */
pixman_format = PIXMAN_a8r8g8b8;
xrender_format = target->screen->connection->standard_formats[CAIRO_FORMAT_ARGB32];
status = _cairo_xcb_shm_image_create (target->screen->connection,
pixman_format,
extents->width, extents->height,
&image, &shm_info);
if (unlikely (status))
return (cairo_xcb_picture_t *) _cairo_surface_create_in_error (status);
_cairo_pattern_init_static_copy (©.base, pattern);
cairo_matrix_translate (©.base.matrix, extents->x, extents->y);
status = _cairo_surface_paint (&image->base,
CAIRO_OPERATOR_SOURCE,
©.base,
NULL);
if (unlikely (status)) {
cairo_surface_destroy (&image->base);
return (cairo_xcb_picture_t *) _cairo_surface_create_in_error (status);
}
picture = _picture_from_image (target, xrender_format, image, shm_info);
cairo_surface_destroy (&image->base);
if (unlikely (picture->base.status))
return picture;
_cairo_xcb_picture_set_component_alpha (picture, pattern->has_component_alpha);
picture->x = -extents->x;
picture->y = -extents->y;
return picture;
}
static xcb_render_fixed_t *
_gradient_to_xcb (const cairo_gradient_pattern_t *gradient,
unsigned int *n_stops,
char *buf, unsigned int buflen)
{
xcb_render_fixed_t *stops;
xcb_render_color_t *colors;
unsigned int i;
assert (gradient->n_stops > 0);
*n_stops = MAX (gradient->n_stops, 2);
if (*n_stops * (sizeof (xcb_render_fixed_t) + sizeof (xcb_render_color_t)) < buflen)
{
stops = (xcb_render_fixed_t *) buf;
}
else
{
stops =
_cairo_malloc_ab (*n_stops,
sizeof (xcb_render_fixed_t) + sizeof (xcb_render_color_t));
if (unlikely (stops == NULL))
return NULL;
}
colors = (xcb_render_color_t *) (stops + *n_stops);
for (i = 0; i < gradient->n_stops; i++) {
stops[i] =
_cairo_fixed_16_16_from_double (gradient->stops[i].offset);
colors[i].red = gradient->stops[i].color.red_short;
colors[i].green = gradient->stops[i].color.green_short;
colors[i].blue = gradient->stops[i].color.blue_short;
colors[i].alpha = gradient->stops[i].color.alpha_short;
}
/* RENDER does not support gradients with less than 2 stops. If a
* gradient has only a single stop, duplicate it to make RENDER
* happy. */
if (gradient->n_stops == 1) {
stops[1] = _cairo_fixed_16_16_from_double (gradient->stops[0].offset);
colors[1].red = gradient->stops[0].color.red_short;
colors[1].green = gradient->stops[0].color.green_short;
colors[1].blue = gradient->stops[0].color.blue_short;
colors[1].alpha = gradient->stops[0].color.alpha_short;
}
return stops;
}
static cairo_xcb_picture_t *
_cairo_xcb_linear_picture (cairo_xcb_surface_t *target,
const cairo_linear_pattern_t *pattern,
const cairo_rectangle_int_t *extents)
{
char buf[CAIRO_STACK_BUFFER_SIZE];
xcb_render_fixed_t *stops;
xcb_render_color_t *colors;
xcb_render_pointfix_t p1, p2;
cairo_matrix_t matrix;
cairo_circle_double_t extremes[2];
cairo_xcb_picture_t *picture;
cairo_status_t status;
unsigned int n_stops;
_cairo_gradient_pattern_fit_to_range (&pattern->base, PIXMAN_MAX_INT >> 1, &matrix, extremes);
picture = (cairo_xcb_picture_t *)
_cairo_xcb_screen_lookup_linear_picture (target->screen, pattern);
if (picture != NULL)
goto setup_picture;
stops = _gradient_to_xcb (&pattern->base, &n_stops, buf, sizeof (buf));
if (unlikely (stops == NULL))
return (cairo_xcb_picture_t *) _cairo_surface_create_in_error (CAIRO_STATUS_NO_MEMORY);
picture = _cairo_xcb_picture_create (target->screen,
target->screen->connection->standard_formats[CAIRO_FORMAT_ARGB32],
PIXMAN_a8r8g8b8,
-1, -1);
if (unlikely (picture->base.status)) {
if (stops != (xcb_render_fixed_t *) buf)
free (stops);
return picture;
}
picture->filter = CAIRO_FILTER_DEFAULT;
colors = (xcb_render_color_t *) (stops + n_stops);
p1.x = _cairo_fixed_16_16_from_double (extremes[0].center.x);
p1.y = _cairo_fixed_16_16_from_double (extremes[0].center.y);
p2.x = _cairo_fixed_16_16_from_double (extremes[1].center.x);
p2.y = _cairo_fixed_16_16_from_double (extremes[1].center.y);
_cairo_xcb_connection_render_create_linear_gradient (target->connection,
picture->picture,
p1, p2,
n_stops,
stops, colors);
if (stops != (xcb_render_fixed_t *) buf)
free (stops);
status = _cairo_xcb_screen_store_linear_picture (target->screen,
pattern,
&picture->base);
if (unlikely (status)) {
cairo_surface_destroy (&picture->base);
return (cairo_xcb_picture_t *) _cairo_surface_create_in_error (status);
}
setup_picture:
_cairo_xcb_picture_set_matrix (picture, &matrix,
pattern->base.base.filter,
extents->x + extents->width/2.,
extents->y + extents->height/2.);
_cairo_xcb_picture_set_filter (picture, pattern->base.base.filter);
_cairo_xcb_picture_set_extend (picture, pattern->base.base.extend);
_cairo_xcb_picture_set_component_alpha (picture,
pattern->base.base.has_component_alpha);
return picture;
}
static cairo_xcb_picture_t *
_cairo_xcb_radial_picture (cairo_xcb_surface_t *target,
const cairo_radial_pattern_t *pattern,
const cairo_rectangle_int_t *extents)
{
char buf[CAIRO_STACK_BUFFER_SIZE];
xcb_render_fixed_t *stops;
xcb_render_color_t *colors;
xcb_render_pointfix_t p1, p2;
xcb_render_fixed_t r1, r2;
cairo_matrix_t matrix;
cairo_circle_double_t extremes[2];
cairo_xcb_picture_t *picture;
cairo_status_t status;
unsigned int n_stops;
_cairo_gradient_pattern_fit_to_range (&pattern->base, PIXMAN_MAX_INT >> 1, &matrix, extremes);
picture = (cairo_xcb_picture_t *)
_cairo_xcb_screen_lookup_radial_picture (target->screen, pattern);
if (picture != NULL)
goto setup_picture;
stops = _gradient_to_xcb (&pattern->base, &n_stops, buf, sizeof (buf));
if (unlikely (stops == NULL))
return (cairo_xcb_picture_t *) _cairo_surface_create_in_error (CAIRO_STATUS_NO_MEMORY);
picture = _cairo_xcb_picture_create (target->screen,
target->screen->connection->standard_formats[CAIRO_FORMAT_ARGB32],
PIXMAN_a8r8g8b8,
-1, -1);
if (unlikely (picture->base.status)) {
if (stops != (xcb_render_fixed_t *) buf)
free (stops);
return picture;
}
picture->filter = CAIRO_FILTER_DEFAULT;
colors = (xcb_render_color_t *) (stops + n_stops);
p1.x = _cairo_fixed_16_16_from_double (extremes[0].center.x);
p1.y = _cairo_fixed_16_16_from_double (extremes[0].center.y);
p2.x = _cairo_fixed_16_16_from_double (extremes[1].center.x);
p2.y = _cairo_fixed_16_16_from_double (extremes[1].center.y);
r1 = _cairo_fixed_16_16_from_double (extremes[0].radius);
r2 = _cairo_fixed_16_16_from_double (extremes[1].radius);
_cairo_xcb_connection_render_create_radial_gradient (target->connection,
picture->picture,
p1, p2, r1, r2,
n_stops,
stops, colors);
if (stops != (xcb_render_fixed_t *) buf)
free (stops);
status = _cairo_xcb_screen_store_radial_picture (target->screen,
pattern,
&picture->base);
if (unlikely (status)) {
cairo_surface_destroy (&picture->base);
return (cairo_xcb_picture_t *) _cairo_surface_create_in_error (status);
}
setup_picture:
_cairo_xcb_picture_set_matrix (picture, &matrix,
pattern->base.base.filter,
extents->x + extents->width/2.,
extents->y + extents->height/2.);
_cairo_xcb_picture_set_filter (picture, pattern->base.base.filter);
_cairo_xcb_picture_set_extend (picture, pattern->base.base.extend);
_cairo_xcb_picture_set_component_alpha (picture,
pattern->base.base.has_component_alpha);
return picture;
}
static cairo_xcb_picture_t *
_copy_to_picture (cairo_xcb_surface_t *source)
{
cairo_xcb_picture_t *picture;
uint32_t values[] = { 0, 1 };