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/*************************************************************************/
/* image_loader_svg.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "image_loader_svg.h"
#include "core/os/memory.h"
#include "core/variant/variant.h"
#include <thorvg.h>
HashMap<Color, Color> ImageLoaderSVG::forced_color_map = HashMap<Color, Color>();
void ImageLoaderSVG::set_forced_color_map(const HashMap<Color, Color> &p_color_map) {
forced_color_map = p_color_map;
}
void ImageLoaderSVG::_replace_color_property(const HashMap<Color, Color> &p_color_map, const String &p_prefix, String &r_string) {
// Replace colors in the SVG based on what is passed in `p_color_map`.
// Used to change the colors of editor icons based on the used theme.
// The strings being replaced are typically of the form:
// fill="#5abbef"
// But can also be 3-letter codes, include alpha, be "none" or a named color
// string ("blue"). So we convert to Godot Color to compare with `p_color_map`.
const int prefix_len = p_prefix.length();
int pos = r_string.find(p_prefix);
while (pos != -1) {
pos += prefix_len; // Skip prefix.
int end_pos = r_string.find("\"", pos);
ERR_FAIL_COND_MSG(end_pos == -1, vformat("Malformed SVG string after property \"%s\".", p_prefix));
const String color_code = r_string.substr(pos, end_pos - pos);
if (color_code != "none" && !color_code.begins_with("url(")) {
const Color color = Color(color_code); // Handles both HTML codes and named colors.
if (p_color_map.has(color)) {
r_string = r_string.left(pos) + "#" + p_color_map[color].to_html(false) + r_string.substr(end_pos);
}
}
// Search for other occurrences.
pos = r_string.find(p_prefix, pos);
}
}
void ImageLoaderSVG::create_image_from_string(Ref<Image> p_image, String p_string, float p_scale, bool p_upsample, const HashMap<Color, Color> &p_color_map) {
ERR_FAIL_COND(Math::is_zero_approx(p_scale));
if (p_color_map.size()) {
_replace_color_property(p_color_map, "stop-color=\"", p_string);
_replace_color_property(p_color_map, "fill=\"", p_string);
_replace_color_property(p_color_map, "stroke=\"", p_string);
}
std::unique_ptr<tvg::Picture> picture = tvg::Picture::gen();
PackedByteArray bytes = p_string.to_utf8_buffer();
tvg::Result result = picture->load((const char *)bytes.ptr(), bytes.size(), "svg", true);
if (result != tvg::Result::Success) {
return;
}
float fw, fh;
picture->size(&fw, &fh);
uint32_t width = MIN(round(fw * p_scale), 16 * 1024);
uint32_t height = MIN(round(fh * p_scale), 16 * 1024);
picture->size(width, height);
std::unique_ptr<tvg::SwCanvas> sw_canvas = tvg::SwCanvas::gen();
// Note: memalloc here, be sure to memfree before any return.
uint32_t *buffer = (uint32_t *)memalloc(sizeof(uint32_t) * width * height);
tvg::Result res = sw_canvas->target(buffer, width, width, height, tvg::SwCanvas::ARGB8888_STRAIGHT);
if (res != tvg::Result::Success) {
memfree(buffer);
ERR_FAIL_MSG("ImageLoaderSVG can't create image.");
}
res = sw_canvas->push(std::move(picture));
if (res != tvg::Result::Success) {
memfree(buffer);
ERR_FAIL_MSG("ImageLoaderSVG can't create image.");
}
res = sw_canvas->draw();
if (res != tvg::Result::Success) {
memfree(buffer);
ERR_FAIL_MSG("ImageLoaderSVG can't create image.");
}
res = sw_canvas->sync();
if (res != tvg::Result::Success) {
memfree(buffer);
ERR_FAIL_MSG("ImageLoaderSVG can't create image.");
}
Vector<uint8_t> image;
image.resize(width * height * sizeof(uint32_t));
for (uint32_t y = 0; y < height; y++) {
for (uint32_t x = 0; x < width; x++) {
uint32_t n = buffer[y * width + x];
const size_t offset = sizeof(uint32_t) * width * y + sizeof(uint32_t) * x;
image.write[offset + 0] = (n >> 16) & 0xff;
image.write[offset + 1] = (n >> 8) & 0xff;
image.write[offset + 2] = n & 0xff;
image.write[offset + 3] = (n >> 24) & 0xff;
}
}
res = sw_canvas->clear(true);
memfree(buffer);
p_image->create(width, height, false, Image::FORMAT_RGBA8, image);
}
void ImageLoaderSVG::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("svg");
}
Error ImageLoaderSVG::load_image(Ref<Image> p_image, Ref<FileAccess> p_fileaccess, uint32_t p_flags, float p_scale) {
String svg = p_fileaccess->get_as_utf8_string();
if (p_flags & FLAG_CONVERT_COLORS) {
create_image_from_string(p_image, svg, p_scale, false, forced_color_map);
} else {
create_image_from_string(p_image, svg, p_scale, false, HashMap<Color, Color>());
}
ERR_FAIL_COND_V(p_image->is_empty(), FAILED);
if (p_flags & FLAG_FORCE_LINEAR) {
p_image->srgb_to_linear();
}
return OK;
}
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