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https://github.com/godotengine/godot
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208 lines
8.4 KiB
C++
208 lines
8.4 KiB
C++
/**************************************************************************/
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/* image_loader_svg.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "image_loader_svg.h"
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#include "core/os/memory.h"
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#include "core/variant/variant.h"
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#include <thorvg.h>
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HashMap<Color, Color> ImageLoaderSVG::forced_color_map = HashMap<Color, Color>();
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void ImageLoaderSVG::set_forced_color_map(const HashMap<Color, Color> &p_color_map) {
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forced_color_map = p_color_map;
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}
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void ImageLoaderSVG::_replace_color_property(const HashMap<Color, Color> &p_color_map, const String &p_prefix, String &r_string) {
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// Replace colors in the SVG based on what is passed in `p_color_map`.
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// Used to change the colors of editor icons based on the used theme.
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// The strings being replaced are typically of the form:
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// fill="#5abbef"
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// But can also be 3-letter codes, include alpha, be "none" or a named color
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// string ("blue"). So we convert to Godot Color to compare with `p_color_map`.
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const int prefix_len = p_prefix.length();
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int pos = r_string.find(p_prefix);
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while (pos != -1) {
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pos += prefix_len; // Skip prefix.
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int end_pos = r_string.find("\"", pos);
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ERR_FAIL_COND_MSG(end_pos == -1, vformat("Malformed SVG string after property \"%s\".", p_prefix));
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const String color_code = r_string.substr(pos, end_pos - pos);
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if (color_code != "none" && !color_code.begins_with("url(")) {
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const Color color = Color(color_code); // Handles both HTML codes and named colors.
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if (p_color_map.has(color)) {
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r_string = r_string.left(pos) + "#" + p_color_map[color].to_html(false) + r_string.substr(end_pos);
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}
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}
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// Search for other occurrences.
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pos = r_string.find(p_prefix, pos);
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}
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}
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Ref<Image> ImageLoaderSVG::load_mem_svg(const uint8_t *p_svg, int p_size, float p_scale) {
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Ref<Image> img;
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img.instantiate();
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Error err = create_image_from_utf8_buffer(img, p_svg, p_size, p_scale, false);
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ERR_FAIL_COND_V_MSG(err != OK, Ref<Image>(), vformat("ImageLoaderSVG: Failed to create SVG from buffer, error code %d.", err));
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return img;
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}
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Error ImageLoaderSVG::create_image_from_utf8_buffer(Ref<Image> p_image, const uint8_t *p_buffer, int p_buffer_size, float p_scale, bool p_upsample) {
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ERR_FAIL_COND_V_MSG(Math::is_zero_approx(p_scale), ERR_INVALID_PARAMETER, "ImageLoaderSVG: Can't load SVG with a scale of 0.");
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std::unique_ptr<tvg::Picture> picture = tvg::Picture::gen();
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tvg::Result result = picture->load((const char *)p_buffer, p_buffer_size, "svg", true);
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if (result != tvg::Result::Success) {
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return ERR_INVALID_DATA;
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}
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float fw, fh;
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picture->size(&fw, &fh);
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uint32_t width = MAX(1, round(fw * p_scale));
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uint32_t height = MAX(1, round(fh * p_scale));
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const uint32_t max_dimension = 16384;
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if (width > max_dimension || height > max_dimension) {
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WARN_PRINT(vformat(
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String::utf8("ImageLoaderSVG: Target canvas dimensions %d×%d (with scale %.2f) exceed the max supported dimensions %d×%d. The target canvas will be scaled down."),
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width, height, p_scale, max_dimension, max_dimension));
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width = MIN(width, max_dimension);
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height = MIN(height, max_dimension);
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}
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picture->size(width, height);
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std::unique_ptr<tvg::SwCanvas> sw_canvas = tvg::SwCanvas::gen();
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// Note: memalloc here, be sure to memfree before any return.
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uint32_t *buffer = (uint32_t *)memalloc(sizeof(uint32_t) * width * height);
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tvg::Result res = sw_canvas->target(buffer, width, width, height, tvg::SwCanvas::ARGB8888S);
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if (res != tvg::Result::Success) {
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memfree(buffer);
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ERR_FAIL_V_MSG(FAILED, "ImageLoaderSVG: Couldn't set target on ThorVG canvas.");
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}
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res = sw_canvas->push(std::move(picture));
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if (res != tvg::Result::Success) {
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memfree(buffer);
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ERR_FAIL_V_MSG(FAILED, "ImageLoaderSVG: Couldn't insert ThorVG picture on canvas.");
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}
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res = sw_canvas->draw();
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if (res != tvg::Result::Success) {
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memfree(buffer);
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ERR_FAIL_V_MSG(FAILED, "ImageLoaderSVG: Couldn't draw ThorVG pictures on canvas.");
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}
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res = sw_canvas->sync();
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if (res != tvg::Result::Success) {
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memfree(buffer);
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ERR_FAIL_V_MSG(FAILED, "ImageLoaderSVG: Couldn't sync ThorVG canvas.");
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}
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Vector<uint8_t> image;
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image.resize(width * height * sizeof(uint32_t));
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for (uint32_t y = 0; y < height; y++) {
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for (uint32_t x = 0; x < width; x++) {
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uint32_t n = buffer[y * width + x];
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const size_t offset = sizeof(uint32_t) * width * y + sizeof(uint32_t) * x;
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image.write[offset + 0] = (n >> 16) & 0xff;
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image.write[offset + 1] = (n >> 8) & 0xff;
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image.write[offset + 2] = n & 0xff;
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image.write[offset + 3] = (n >> 24) & 0xff;
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}
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}
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res = sw_canvas->clear(true);
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memfree(buffer);
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p_image->set_data(width, height, false, Image::FORMAT_RGBA8, image);
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return OK;
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}
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Error ImageLoaderSVG::create_image_from_utf8_buffer(Ref<Image> p_image, const PackedByteArray &p_buffer, float p_scale, bool p_upsample) {
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return create_image_from_utf8_buffer(p_image, p_buffer.ptr(), p_buffer.size(), p_scale, p_upsample);
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}
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Error 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) {
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if (p_color_map.size()) {
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_replace_color_property(p_color_map, "stop-color=\"", p_string);
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_replace_color_property(p_color_map, "fill=\"", p_string);
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_replace_color_property(p_color_map, "stroke=\"", p_string);
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}
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PackedByteArray bytes = p_string.to_utf8_buffer();
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return create_image_from_utf8_buffer(p_image, bytes, p_scale, p_upsample);
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}
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void ImageLoaderSVG::get_recognized_extensions(List<String> *p_extensions) const {
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p_extensions->push_back("svg");
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}
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Error ImageLoaderSVG::load_image(Ref<Image> p_image, Ref<FileAccess> p_fileaccess, BitField<ImageFormatLoader::LoaderFlags> p_flags, float p_scale) {
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const uint64_t len = p_fileaccess->get_length() - p_fileaccess->get_position();
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Vector<uint8_t> buffer;
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buffer.resize(len);
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p_fileaccess->get_buffer(buffer.ptrw(), buffer.size());
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String svg;
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Error err = svg.parse_utf8((const char *)buffer.ptr(), buffer.size());
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if (err != OK) {
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return err;
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}
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if (p_flags & FLAG_CONVERT_COLORS) {
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err = create_image_from_string(p_image, svg, p_scale, false, forced_color_map);
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} else {
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err = create_image_from_string(p_image, svg, p_scale, false, HashMap<Color, Color>());
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}
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if (err != OK) {
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return err;
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} else if (p_image->is_empty()) {
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return ERR_INVALID_DATA;
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}
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if (p_flags & FLAG_FORCE_LINEAR) {
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p_image->srgb_to_linear();
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}
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return OK;
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}
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ImageLoaderSVG::ImageLoaderSVG() {
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Image::_svg_scalable_mem_loader_func = load_mem_svg;
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}
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