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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,12 @@ | ||
| module github.com/kelindar/tile | ||
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| go 1.16 | ||
| go 1.17 | ||
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| require github.com/stretchr/testify v1.7.0 | ||
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| require ( | ||
| github.com/davecgh/go-spew v1.1.0 // indirect | ||
| github.com/kelindar/iostream v1.2.0 // indirect | ||
| github.com/pmezard/go-difflib v1.0.0 // indirect | ||
| gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,67 +1,66 @@ | ||
| // Copyright (c) Roman Atachiants and contributors. All rights reserved. | ||
| // Licensed under the MIT license. See LICENSE file in the project root for details. | ||
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| package tile | ||
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| import ( | ||
| "bufio" | ||
| "encoding/binary" | ||
| "io" | ||
| ) | ||
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| const tileDataSize = 54 | ||
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| // WriteTo writes the grid to a specific writer. | ||
| func (m *Grid) WriteTo(dst io.Writer) (n int64, err error) { | ||
| var c int | ||
| p1 := At(0, 0) | ||
| p2 := At(m.Size.X-1, m.Size.Y-1) | ||
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| // Write the viewport size | ||
| header := make([]byte, 8) | ||
| binary.BigEndian.PutUint16(header[0:2], uint16(p1.X)) | ||
| binary.BigEndian.PutUint16(header[2:4], uint16(p1.Y)) | ||
| binary.BigEndian.PutUint16(header[4:6], uint16(p2.X)) | ||
| binary.BigEndian.PutUint16(header[6:8], uint16(p2.Y)) | ||
| if c, err = dst.Write(header); err != nil { | ||
| return | ||
| } | ||
| n += int64(c) | ||
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| // Write the grid data | ||
| m.pagesWithin(p1, p2, func(page *page) { | ||
| if c, err = dst.Write(page.Data()); err != nil { | ||
| return | ||
| } | ||
| n += int64(c) | ||
| }) | ||
| return | ||
| } | ||
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| // ReadFrom reads the grid from the reader. | ||
| func ReadFrom(rdr io.Reader) (grid *Grid, err error) { | ||
| reader := bufio.NewReader(rdr) | ||
| header := make([]byte, 8) | ||
| if _, err = io.ReadFull(reader, header); err != nil { | ||
| return | ||
| } | ||
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| // Read the size | ||
| var view Rect | ||
| view.Min.X = int16(binary.BigEndian.Uint16(header[0:2])) | ||
| view.Min.Y = int16(binary.BigEndian.Uint16(header[2:4])) | ||
| view.Max.X = int16(binary.BigEndian.Uint16(header[4:6])) | ||
| view.Max.Y = int16(binary.BigEndian.Uint16(header[6:8])) | ||
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| // Allocate a new grid | ||
| grid = NewGrid(view.Max.X+1, view.Max.Y+1) | ||
| buf := make([]byte, tileDataSize) | ||
| grid.pagesWithin(view.Min, view.Max, func(page *page) { | ||
| if _, err = io.ReadFull(reader, buf); err != nil { | ||
| return | ||
| } | ||
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| copy(page.Data(), buf) | ||
| }) | ||
| return | ||
| } | ||
| // Copyright (c) Roman Atachiants and contributors. All rights reserved. | ||
| // Licensed under the MIT license. See LICENSE file in the project root for details. | ||
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| package tile | ||
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| import ( | ||
| "encoding/binary" | ||
| "io" | ||
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| "github.com/kelindar/iostream" | ||
| ) | ||
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| const tileDataSize = 54 | ||
|
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| // WriteTo writes the grid to a specific writer. | ||
| func (m *Grid) WriteTo(dst io.Writer) (n int64, err error) { | ||
| p1 := At(0, 0) | ||
| p2 := At(m.Size.X-1, m.Size.Y-1) | ||
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| // Write the viewport size | ||
| w := iostream.NewWriter(dst) | ||
| header := make([]byte, 8) | ||
| binary.BigEndian.PutUint16(header[0:2], uint16(p1.X)) | ||
| binary.BigEndian.PutUint16(header[2:4], uint16(p1.Y)) | ||
| binary.BigEndian.PutUint16(header[4:6], uint16(p2.X)) | ||
| binary.BigEndian.PutUint16(header[6:8], uint16(p2.Y)) | ||
| if _, err := w.Write(header); err != nil { | ||
| return w.Offset(), err | ||
| } | ||
|
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| // Write the grid data | ||
| m.pagesWithin(p1, p2, func(page *page) { | ||
| if _, err := w.Write(page.Data()); err != nil { | ||
| return | ||
| } | ||
| }) | ||
| return w.Offset(), nil | ||
| } | ||
|
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| // ReadFrom reads the grid from the reader. | ||
| func ReadFrom(src io.Reader) (grid *Grid, err error) { | ||
| r := iostream.NewReader(src) | ||
| header := make([]byte, 8) | ||
| if _, err := io.ReadFull(r, header); err != nil { | ||
| return nil, err | ||
| } | ||
|
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| // Read the size | ||
| var view Rect | ||
| view.Min.X = int16(binary.BigEndian.Uint16(header[0:2])) | ||
| view.Min.Y = int16(binary.BigEndian.Uint16(header[2:4])) | ||
| view.Max.X = int16(binary.BigEndian.Uint16(header[4:6])) | ||
| view.Max.Y = int16(binary.BigEndian.Uint16(header[6:8])) | ||
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| // Allocate a new grid | ||
| grid = NewGrid(view.Max.X+1, view.Max.Y+1) | ||
| buf := make([]byte, tileDataSize) | ||
| grid.pagesWithin(view.Min, view.Max, func(page *page) { | ||
| if _, err := io.ReadFull(r, buf); err != nil { | ||
| return | ||
| } | ||
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| copy(page.Data(), buf) | ||
| }) | ||
| return | ||
| } |
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