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https://github.com/gosticks/gml.git
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95 lines
2.4 KiB
Go
95 lines
2.4 KiB
Go
/*
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* GML - Go QML
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Roland Singer <roland.singer[at]desertbit.com>
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* Copyright (c) 2019 Sebastian Borchers <sebastian[at]desertbit.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package gml
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// #include <gml.h>
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import "C"
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import (
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"fmt"
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"runtime"
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"unsafe"
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)
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// TODO: add LoadFromBuffer & LoadFromGoImage
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type Image struct {
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freed bool
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img C.gml_image
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}
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func NewImage() (img *Image) {
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return newImage(C.gml_image_new(), true)
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}
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func newImage(imgC C.gml_image, free bool) (img *Image) {
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// Check if something failed.
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// This should never happen is signalizes a fatal error.
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if imgC == nil {
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panic(fmt.Errorf("gml image: C pointer is nil"))
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}
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img = &Image{
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freed: !free,
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img: imgC,
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}
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// Always free the C++ value if defined so.
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if free {
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runtime.SetFinalizer(img, freeImage)
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}
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return
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}
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func freeImage(img *Image) {
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if img.freed {
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return
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}
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img.freed = true
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C.gml_image_free(img.img)
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}
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func (img *Image) Free() {
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freeImage(img)
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}
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func (img *Image) LoadFromData(data []byte) error {
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if len(data) == 0 {
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return fmt.Errorf("empty data")
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}
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apiErr := errorPool.Get()
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defer errorPool.Put(apiErr)
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ret := C.gml_image_load_from_data(img.img, (*C.char)(unsafe.Pointer(&data[0])), C.int(len(data)), apiErr.err)
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if ret != 0 {
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return apiErr.Err("failed to load from data")
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}
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return nil
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}
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