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640 lines
15 KiB
640 lines
15 KiB
/*
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* Copyright © 2008 Kristian Høgsberg
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* Copyright © 2012 Intel Corporation
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include "../config.h"
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <math.h>
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#include <cairo.h>
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#include "cairo-util.h"
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#include <jpeglib.h>
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#include <png.h>
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#ifdef HAVE_WEBP
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#include <webp/decode.h>
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#endif
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#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
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void
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surface_flush_device(cairo_surface_t *surface)
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{
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cairo_device_t *device;
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device = cairo_surface_get_device(surface);
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if (device)
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cairo_device_flush(device);
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}
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void
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blur_surface(cairo_surface_t *surface, int margin)
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{
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int32_t width, height, stride, x, y, z, w;
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uint8_t *src, *dst;
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uint32_t *s, *d, a, p;
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int i, j, k, size, half;
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uint32_t kernel[49];
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double f;
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size = ARRAY_LENGTH(kernel);
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width = cairo_image_surface_get_width(surface);
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height = cairo_image_surface_get_height(surface);
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stride = cairo_image_surface_get_stride(surface);
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src = cairo_image_surface_get_data(surface);
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dst = malloc(height * stride);
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half = size / 2;
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a = 0;
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for (i = 0; i < size; i++) {
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f = (i - half);
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kernel[i] = exp(- f * f / ARRAY_LENGTH(kernel)) * 10000;
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a += kernel[i];
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}
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for (i = 0; i < height; i++) {
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s = (uint32_t *) (src + i * stride);
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d = (uint32_t *) (dst + i * stride);
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for (j = 0; j < width; j++) {
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if (margin < j && j < width - margin) {
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d[j] = s[j];
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continue;
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}
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x = 0;
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y = 0;
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z = 0;
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w = 0;
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for (k = 0; k < size; k++) {
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if (j - half + k < 0 || j - half + k >= width)
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continue;
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p = s[j - half + k];
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x += (p >> 24) * kernel[k];
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y += ((p >> 16) & 0xff) * kernel[k];
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z += ((p >> 8) & 0xff) * kernel[k];
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w += (p & 0xff) * kernel[k];
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}
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d[j] = (x / a << 24) | (y / a << 16) | (z / a << 8) | w / a;
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}
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}
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for (i = 0; i < height; i++) {
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s = (uint32_t *) (dst + i * stride);
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d = (uint32_t *) (src + i * stride);
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for (j = 0; j < width; j++) {
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if (margin <= i && i < height - margin) {
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d[j] = s[j];
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continue;
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}
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x = 0;
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y = 0;
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z = 0;
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w = 0;
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for (k = 0; k < size; k++) {
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if (i - half + k < 0 || i - half + k >= height)
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continue;
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s = (uint32_t *) (dst + (i - half + k) * stride);
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p = s[j];
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x += (p >> 24) * kernel[k];
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y += ((p >> 16) & 0xff) * kernel[k];
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z += ((p >> 8) & 0xff) * kernel[k];
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w += (p & 0xff) * kernel[k];
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}
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d[j] = (x / a << 24) | (y / a << 16) | (z / a << 8) | w / a;
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}
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}
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free(dst);
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cairo_surface_mark_dirty(surface);
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}
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void
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tile_mask(cairo_t *cr, cairo_surface_t *surface,
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int x, int y, int width, int height, int margin, int top_margin)
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{
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cairo_pattern_t *pattern;
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cairo_matrix_t matrix;
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int i, fx, fy, vmargin;
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cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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pattern = cairo_pattern_create_for_surface (surface);
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for (i = 0; i < 4; i++) {
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fx = i & 1;
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fy = i >> 1;
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cairo_matrix_init_translate(&matrix,
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-x + fx * (128 - width),
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-y + fy * (128 - height));
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cairo_pattern_set_matrix(pattern, &matrix);
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if (fy)
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vmargin = margin;
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else
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vmargin = top_margin;
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cairo_reset_clip(cr);
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cairo_rectangle(cr,
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x + fx * (width - margin),
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y + fy * (height - vmargin),
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margin, vmargin);
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cairo_clip (cr);
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cairo_mask(cr, pattern);
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}
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/* Top strecth */
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cairo_matrix_init_translate(&matrix, 64, 0);
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cairo_matrix_scale(&matrix, 64.0 / (width - 2 * margin), 1);
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cairo_matrix_translate(&matrix, -x - width / 2, -y);
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cairo_pattern_set_matrix(pattern, &matrix);
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cairo_rectangle(cr, x + margin, y, width - 2 * margin, margin);
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cairo_reset_clip(cr);
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cairo_rectangle(cr,
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x + margin,
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y,
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width - 2 * margin, margin);
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cairo_clip (cr);
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cairo_mask(cr, pattern);
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/* Bottom strecth */
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cairo_matrix_translate(&matrix, 0, -height + 128);
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cairo_pattern_set_matrix(pattern, &matrix);
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cairo_reset_clip(cr);
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cairo_rectangle(cr, x + margin, y + height - margin,
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width - 2 * margin, margin);
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cairo_clip (cr);
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cairo_mask(cr, pattern);
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/* Left strecth */
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cairo_matrix_init_translate(&matrix, 0, 64);
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cairo_matrix_scale(&matrix, 1, 64.0 / (height - 2 * margin));
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cairo_matrix_translate(&matrix, -x, -y - height / 2);
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cairo_pattern_set_matrix(pattern, &matrix);
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cairo_reset_clip(cr);
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cairo_rectangle(cr, x, y + margin, margin, height - 2 * margin);
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cairo_clip (cr);
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cairo_mask(cr, pattern);
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/* Right strecth */
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cairo_matrix_translate(&matrix, -width + 128, 0);
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cairo_pattern_set_matrix(pattern, &matrix);
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cairo_rectangle(cr, x + width - margin, y + margin,
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margin, height - 2 * margin);
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cairo_reset_clip(cr);
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cairo_clip (cr);
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cairo_mask(cr, pattern);
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cairo_pattern_destroy(pattern);
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cairo_reset_clip(cr);
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}
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void
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tile_source(cairo_t *cr, cairo_surface_t *surface,
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int x, int y, int width, int height, int margin, int top_margin)
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{
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cairo_pattern_t *pattern;
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cairo_matrix_t matrix;
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int i, fx, fy, vmargin;
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cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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pattern = cairo_pattern_create_for_surface (surface);
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cairo_set_source(cr, pattern);
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cairo_pattern_destroy(pattern);
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for (i = 0; i < 4; i++) {
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fx = i & 1;
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fy = i >> 1;
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cairo_matrix_init_translate(&matrix,
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-x + fx * (128 - width),
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-y + fy * (128 - height));
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cairo_pattern_set_matrix(pattern, &matrix);
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if (fy)
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vmargin = margin;
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else
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vmargin = top_margin;
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cairo_rectangle(cr,
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x + fx * (width - margin),
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y + fy * (height - vmargin),
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margin, vmargin);
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cairo_fill(cr);
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}
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/* Top strecth */
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cairo_matrix_init_translate(&matrix, 64, 0);
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cairo_matrix_scale(&matrix, 64.0 / (width - 2 * margin), 1);
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cairo_matrix_translate(&matrix, -x - width / 2, -y);
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cairo_pattern_set_matrix(pattern, &matrix);
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cairo_rectangle(cr, x + margin, y, width - 2 * margin, top_margin);
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cairo_fill(cr);
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/* Bottom strecth */
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cairo_matrix_translate(&matrix, 0, -height + 128);
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cairo_pattern_set_matrix(pattern, &matrix);
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cairo_rectangle(cr, x + margin, y + height - margin,
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width - 2 * margin, margin);
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cairo_fill(cr);
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/* Left strecth */
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cairo_matrix_init_translate(&matrix, 0, 64);
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cairo_matrix_scale(&matrix, 1, 64.0 / (height - margin - top_margin));
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cairo_matrix_translate(&matrix, -x, -y - height / 2);
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cairo_pattern_set_matrix(pattern, &matrix);
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cairo_rectangle(cr, x, y + top_margin,
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margin, height - margin - top_margin);
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cairo_fill(cr);
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/* Right strecth */
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cairo_matrix_translate(&matrix, -width + 128, 0);
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cairo_pattern_set_matrix(pattern, &matrix);
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cairo_rectangle(cr, x + width - margin, y + top_margin,
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margin, height - margin - top_margin);
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cairo_fill(cr);
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}
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void
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rounded_rect(cairo_t *cr, int x0, int y0, int x1, int y1, int radius)
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{
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cairo_move_to(cr, x0, y0 + radius);
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cairo_arc(cr, x0 + radius, y0 + radius, radius, M_PI, 3 * M_PI / 2);
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cairo_line_to(cr, x1 - radius, y0);
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cairo_arc(cr, x1 - radius, y0 + radius, radius, 3 * M_PI / 2, 2 * M_PI);
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cairo_line_to(cr, x1, y1 - radius);
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cairo_arc(cr, x1 - radius, y1 - radius, radius, 0, M_PI / 2);
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cairo_line_to(cr, x0 + radius, y1);
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cairo_arc(cr, x0 + radius, y1 - radius, radius, M_PI / 2, M_PI);
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cairo_close_path(cr);
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}
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static void
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swizzle_row(JSAMPLE *row, JDIMENSION width)
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{
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JSAMPLE *s;
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uint32_t *d;
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s = row + (width - 1) * 3;
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d = (uint32_t *) (row + (width - 1) * 4);
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while (s >= row) {
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*d = 0xff000000 | (s[0] << 16) | (s[1] << 8) | (s[2] << 0);
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s -= 3;
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d--;
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}
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}
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static void
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error_exit(j_common_ptr cinfo)
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{
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longjmp(cinfo->client_data, 1);
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}
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static cairo_surface_t *
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load_jpeg(FILE *fp)
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{
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struct jpeg_decompress_struct cinfo;
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struct jpeg_error_mgr jerr;
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int stride, i, first;
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JSAMPLE *data, *rows[4];
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jmp_buf env;
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cinfo.err = jpeg_std_error(&jerr);
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jerr.error_exit = error_exit;
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cinfo.client_data = env;
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if (setjmp(env))
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return NULL;
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jpeg_create_decompress(&cinfo);
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jpeg_stdio_src(&cinfo, fp);
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jpeg_read_header(&cinfo, TRUE);
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cinfo.out_color_space = JCS_RGB;
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jpeg_start_decompress(&cinfo);
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stride = cairo_format_stride_for_width(CAIRO_FORMAT_RGB24,
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cinfo.output_width);
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data = malloc(stride * cinfo.output_height);
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if (data == NULL) {
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fprintf(stderr, "couldn't allocate image data\n");
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return NULL;
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}
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while (cinfo.output_scanline < cinfo.output_height) {
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first = cinfo.output_scanline;
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for (i = 0; i < ARRAY_LENGTH(rows); i++)
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rows[i] = data + (first + i) * stride;
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jpeg_read_scanlines(&cinfo, rows, ARRAY_LENGTH(rows));
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for (i = 0; first + i < cinfo.output_scanline; i++)
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swizzle_row(rows[i], cinfo.output_width);
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}
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jpeg_finish_decompress(&cinfo);
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jpeg_destroy_decompress(&cinfo);
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return cairo_image_surface_create_for_data (data,
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CAIRO_FORMAT_RGB24,
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cinfo.output_width,
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cinfo.output_height,
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stride);
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}
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static inline int
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multiply_alpha(int alpha, int color)
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{
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int temp = (alpha * color) + 0x80;
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return ((temp + (temp >> 8)) >> 8);
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}
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static void
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premultiply_data(png_structp png,
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png_row_infop row_info,
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png_bytep data)
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{
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unsigned int i;
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png_bytep p;
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for (i = 0, p = data; i < row_info->rowbytes; i += 4, p += 4) {
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png_byte alpha = p[3];
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uint32_t w;
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if (alpha == 0) {
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w = 0;
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} else {
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png_byte red = p[0];
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png_byte green = p[1];
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png_byte blue = p[2];
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if (alpha != 0xff) {
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red = multiply_alpha(alpha, red);
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green = multiply_alpha(alpha, green);
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blue = multiply_alpha(alpha, blue);
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}
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w = (alpha << 24) | (red << 16) | (green << 8) | (blue << 0);
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}
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* (uint32_t *) p = w;
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}
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}
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static void
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read_func(png_structp png, png_bytep data, png_size_t size)
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{
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FILE *fp = png_get_io_ptr(png);
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if (fread(data, 1, size, fp) < 0)
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png_error(png, NULL);
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}
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static void
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png_error_callback(png_structp png, png_const_charp error_msg)
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{
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longjmp (png_jmpbuf (png), 1);
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}
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static cairo_surface_t *
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load_png(FILE *fp)
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{
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png_struct *png;
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png_info *info;
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png_byte *data = NULL;
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png_byte **row_pointers = NULL;
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png_uint_32 width, height;
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int depth, color_type, interlace, stride;
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unsigned int i;
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png = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL,
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png_error_callback, NULL);
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if (!png)
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return NULL;
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info = png_create_info_struct(png);
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if (!info) {
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png_destroy_read_struct(&png, &info, NULL);
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return NULL;
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}
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if (setjmp(png_jmpbuf(png))) {
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if (data)
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free(data);
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if (row_pointers)
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free(row_pointers);
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png_destroy_read_struct(&png, &info, NULL);
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return NULL;
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}
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png_set_read_fn(png, fp, read_func);
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png_read_info(png, info);
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png_get_IHDR(png, info,
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&width, &height, &depth,
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&color_type, &interlace, NULL, NULL);
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if (color_type == PNG_COLOR_TYPE_PALETTE)
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png_set_palette_to_rgb(png);
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if (color_type == PNG_COLOR_TYPE_GRAY)
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png_set_expand_gray_1_2_4_to_8(png);
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if (png_get_valid(png, info, PNG_INFO_tRNS))
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png_set_tRNS_to_alpha(png);
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if (depth == 16)
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png_set_strip_16(png);
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if (depth < 8)
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png_set_packing(png);
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if (color_type == PNG_COLOR_TYPE_GRAY ||
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color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
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png_set_gray_to_rgb(png);
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if (interlace != PNG_INTERLACE_NONE)
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png_set_interlace_handling(png);
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png_set_filler(png, 0xff, PNG_FILLER_AFTER);
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png_set_read_user_transform_fn(png, premultiply_data);
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png_read_update_info(png, info);
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png_get_IHDR(png, info,
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&width, &height, &depth,
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&color_type, &interlace, NULL, NULL);
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stride = cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, width);
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data = malloc(stride * height);
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if (!data) {
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png_destroy_read_struct(&png, &info, NULL);
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return NULL;
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}
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row_pointers = malloc(height * sizeof row_pointers[0]);
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if (row_pointers == NULL) {
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free(data);
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png_destroy_read_struct(&png, &info, NULL);
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return NULL;
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}
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|
|
for (i = 0; i < height; i++)
|
|
row_pointers[i] = &data[i * stride];
|
|
|
|
png_read_image(png, row_pointers);
|
|
png_read_end(png, info);
|
|
|
|
free(row_pointers);
|
|
png_destroy_read_struct(&png, &info, NULL);
|
|
|
|
return cairo_image_surface_create_for_data (data,
|
|
CAIRO_FORMAT_RGB24,
|
|
width, height, stride);
|
|
}
|
|
|
|
#ifdef HAVE_WEBP
|
|
|
|
static cairo_surface_t *
|
|
load_webp(FILE *fp)
|
|
{
|
|
WebPDecoderConfig config;
|
|
uint8_t buffer[16 * 1024];
|
|
int len;
|
|
VP8StatusCode status;
|
|
WebPIDecoder *idec;
|
|
|
|
if (!WebPInitDecoderConfig(&config)) {
|
|
fprintf(stderr, "Library version mismatch!\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* webp decoding api doesn't seem to specify a min size that's
|
|
usable for GetFeatures, but 256 works... */
|
|
len = fread(buffer, 1, 256, fp);
|
|
status = WebPGetFeatures(buffer, len, &config.input);
|
|
if (status != VP8_STATUS_OK) {
|
|
fprintf(stderr, "failed to parse webp header\n");
|
|
WebPFreeDecBuffer(&config.output);
|
|
return NULL;
|
|
}
|
|
|
|
config.output.colorspace = MODE_BGRA;
|
|
config.output.u.RGBA.stride =
|
|
cairo_format_stride_for_width(CAIRO_FORMAT_RGB24,
|
|
config.input.width);
|
|
config.output.u.RGBA.size =
|
|
config.output.u.RGBA.stride * config.input.height;
|
|
config.output.u.RGBA.rgba =
|
|
malloc(config.output.u.RGBA.stride * config.input.height);
|
|
config.output.is_external_memory = 1;
|
|
if (!config.output.u.RGBA.rgba) {
|
|
WebPFreeDecBuffer(&config.output);
|
|
return NULL;
|
|
}
|
|
|
|
rewind(fp);
|
|
idec = WebPINewDecoder(&config.output);
|
|
if (!idec) {
|
|
WebPFreeDecBuffer(&config.output);
|
|
return NULL;
|
|
}
|
|
|
|
while (!feof(fp)) {
|
|
len = fread(buffer, 1, sizeof buffer, fp);
|
|
status = WebPIAppend(idec, buffer, len);
|
|
if (status != VP8_STATUS_OK) {
|
|
fprintf(stderr, "webp decode status %d\n", status);
|
|
WebPIDelete(idec);
|
|
WebPFreeDecBuffer(&config.output);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
WebPIDelete(idec);
|
|
WebPFreeDecBuffer(&config.output);
|
|
|
|
return cairo_image_surface_create_for_data (config.output.u.RGBA.rgba,
|
|
CAIRO_FORMAT_RGB24,
|
|
config.input.width,
|
|
config.input.height,
|
|
config.output.u.RGBA.stride);
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
struct image_loader {
|
|
char header[4];
|
|
int header_size;
|
|
cairo_surface_t *(*load)(FILE *fp);
|
|
};
|
|
|
|
static const struct image_loader loaders[] = {
|
|
{ { 0x89, 'P', 'N', 'G' }, 4, load_png },
|
|
{ { 0xff, 0xd8 }, 2, load_jpeg },
|
|
#ifdef HAVE_WEBP
|
|
{ { 'R', 'I', 'F', 'F' }, 4, load_webp }
|
|
#endif
|
|
};
|
|
|
|
cairo_surface_t *
|
|
load_image(const char *filename)
|
|
{
|
|
cairo_surface_t *surface;
|
|
unsigned char header[4];
|
|
FILE *fp;
|
|
int i;
|
|
|
|
fp = fopen(filename, "rb");
|
|
if (fp == NULL)
|
|
return NULL;
|
|
|
|
fread(header, sizeof header, 1, fp);
|
|
rewind(fp);
|
|
for (i = 0; i < ARRAY_LENGTH(loaders); i++) {
|
|
if (memcmp(header, loaders[i].header,
|
|
loaders[i].header_size) == 0) {
|
|
surface = loaders[i].load(fp);
|
|
break;
|
|
}
|
|
}
|
|
|
|
fclose(fp);
|
|
|
|
if (i == ARRAY_LENGTH(loaders)) {
|
|
fprintf(stderr, "unrecognized file header for %s: "
|
|
"0x%02x 0x%02x 0x%02x 0x%02x\n",
|
|
filename, header[0], header[1], header[2], header[3]);
|
|
surface = NULL;
|
|
}
|
|
|
|
return surface;
|
|
}
|
|
|