initial commit, 4.5 stable

thirdparty/thorvg/src/loaders/external_webp/tvgWebpLoader.cpp

@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2023 - 2024 the ThorVG project. All rights reserved.
+
+ * 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 <memory.h>
+#include <webp/decode.h>
+
+#include "tvgWebpLoader.h"
+
+
+/************************************************************************/
+/* Internal Class Implementation                                        */
+/************************************************************************/
+
+
+void WebpLoader::run(unsigned tid)
+{
+    //TODO: acquire the current colorspace format & pre-multiplied alpha image.
+    surface.buf8 = WebPDecodeBGRA(data, size, nullptr, nullptr);
+    surface.stride = (uint32_t)w;
+    surface.w = (uint32_t)w;
+    surface.h = (uint32_t)h;
+    surface.channelSize = sizeof(uint32_t);
+    surface.cs = ColorSpace::ARGB8888;
+    surface.premultiplied = false;
+
+}
+
+
+/************************************************************************/
+/* External Class Implementation                                        */
+/************************************************************************/
+
+WebpLoader::WebpLoader() : ImageLoader(FileType::Webp)
+{
+}
+
+
+WebpLoader::~WebpLoader()
+{
+    done();
+
+    if (freeData) free(data);
+    data = nullptr;
+    size = 0;
+    freeData = false;
+    WebPFree(surface.buf8);
+}
+
+
+bool WebpLoader::open(const string& path)
+{
+#ifdef THORVG_FILE_IO_SUPPORT
+    auto webpFile = fopen(path.c_str(), "rb");
+    if (!webpFile) return false;
+
+    auto ret = false;
+
+    //determine size
+    if (fseek(webpFile, 0, SEEK_END) < 0) goto finalize;
+    if (((size = ftell(webpFile)) < 1)) goto finalize;
+    if (fseek(webpFile, 0, SEEK_SET)) goto finalize;
+
+    data = (unsigned char *) malloc(size);
+    if (!data) goto finalize;
+
+    freeData = true;
+
+    if (fread(data, size, 1, webpFile) < 1) goto finalize;
+
+    int width, height;
+    if (!WebPGetInfo(data, size, &width, &height)) goto finalize;
+
+    w = static_cast<float>(width);
+    h = static_cast<float>(height);
+
+    ret = true;
+
+finalize:
+    fclose(webpFile);
+    return ret;
+#else
+    return false;
+#endif
+}
+
+
+bool WebpLoader::open(const char* data, uint32_t size, bool copy)
+{
+    if (copy) {
+        this->data = (unsigned char *) malloc(size);
+        if (!this->data) return false;
+        memcpy((unsigned char *)this->data, data, size);
+        freeData = true;
+    } else {
+        this->data = (unsigned char *) data;
+        freeData = false;
+    }
+
+    int width, height;
+    if (!WebPGetInfo(this->data, size, &width, &height)) return false;
+
+    w = static_cast<float>(width);
+    h = static_cast<float>(height);
+    surface.cs = ColorSpace::ARGB8888;
+    this->size = size;
+    return true;
+}
+
+
+bool WebpLoader::read()
+{
+    if (!LoadModule::read()) return true;
+
+    if (!data || w == 0 || h == 0) return false;
+
+    TaskScheduler::request(this);
+
+    return true;
+}
+
+
+RenderSurface* WebpLoader::bitmap()
+{
+    this->done();
+
+    return ImageLoader::bitmap();
+}