godot/modules/svg/image_loader_svg.cpp
Felipe Augusto Marques 26eb3db234 Added Image's load_svg_from_(buffer|string)
No core dependency to the svg module.
2023-06-23 00:43:43 -03:00

200 lines
8.1 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/**************************************************************************/
/* image_loader_svg.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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);
}
}
Ref<Image> ImageLoaderSVG::load_mem_svg(const uint8_t *p_svg, int p_size, float p_scale) {
Ref<Image> img;
img.instantiate();
Error err = create_image_from_utf8_buffer(img, p_svg, p_size, p_scale, false);
ERR_FAIL_COND_V(err, Ref<Image>());
return img;
}
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) {
ERR_FAIL_COND_V_MSG(Math::is_zero_approx(p_scale), ERR_INVALID_PARAMETER, "ImageLoaderSVG: Can't load SVG with a scale of 0.");
std::unique_ptr<tvg::Picture> picture = tvg::Picture::gen();
tvg::Result result = picture->load((const char *)p_buffer, p_buffer_size, "svg", true);
if (result != tvg::Result::Success) {
return ERR_INVALID_DATA;
}
float fw, fh;
picture->size(&fw, &fh);
uint32_t width = MAX(1, round(fw * p_scale));
uint32_t height = MAX(1, round(fh * p_scale));
const uint32_t max_dimension = 16384;
if (width > max_dimension || height > max_dimension) {
WARN_PRINT(vformat(
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."),
width, height, p_scale, max_dimension, max_dimension));
width = MIN(width, max_dimension);
height = MIN(height, max_dimension);
}
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_V_MSG(FAILED, "ImageLoaderSVG: Couldn't set target on ThorVG canvas.");
}
res = sw_canvas->push(std::move(picture));
if (res != tvg::Result::Success) {
memfree(buffer);
ERR_FAIL_V_MSG(FAILED, "ImageLoaderSVG: Couldn't insert ThorVG picture on canvas.");
}
res = sw_canvas->draw();
if (res != tvg::Result::Success) {
memfree(buffer);
ERR_FAIL_V_MSG(FAILED, "ImageLoaderSVG: Couldn't draw ThorVG pictures on canvas.");
}
res = sw_canvas->sync();
if (res != tvg::Result::Success) {
memfree(buffer);
ERR_FAIL_V_MSG(FAILED, "ImageLoaderSVG: Couldn't sync ThorVG canvas.");
}
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->set_data(width, height, false, Image::FORMAT_RGBA8, image);
return OK;
}
Error ImageLoaderSVG::create_image_from_utf8_buffer(Ref<Image> p_image, const PackedByteArray &p_buffer, float p_scale, bool p_upsample) {
return create_image_from_utf8_buffer(p_image, p_buffer.ptr(), p_buffer.size(), p_scale, p_upsample);
}
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) {
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);
}
PackedByteArray bytes = p_string.to_utf8_buffer();
return create_image_from_utf8_buffer(p_image, bytes, p_scale, p_upsample);
}
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, BitField<ImageFormatLoader::LoaderFlags> p_flags, float p_scale) {
String svg = p_fileaccess->get_as_utf8_string();
Error err;
if (p_flags & FLAG_CONVERT_COLORS) {
err = create_image_from_string(p_image, svg, p_scale, false, forced_color_map);
} else {
err = create_image_from_string(p_image, svg, p_scale, false, HashMap<Color, Color>());
}
if (err != OK) {
return err;
} else if (p_image->is_empty()) {
return ERR_INVALID_DATA;
}
if (p_flags & FLAG_FORCE_LINEAR) {
p_image->srgb_to_linear();
}
return OK;
}
ImageLoaderSVG::ImageLoaderSVG() {
Image::_svg_scalable_mem_loader_func = load_mem_svg;
}