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Fix off-by-one in NRGB

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Kovid Goyal
2025-10-09 08:30:20 +05:30
parent d598157590
commit aecf13302a
1 changed files with 3 additions and 3 deletions
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6
tools/utils/images/to_rgb.go
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@@ -31,8 +31,8 @@ func (c NRGBColor) RGBA() (r, g, b, a uint32) {
// NRGB is an in-memory image whose At method returns NRGBColor values. // NRGB is an in-memory image whose At method returns NRGBColor values.
type NRGB struct { type NRGB struct {
// Pix holds the image's pixels, in R, G, B, A order. The pixel at // Pix holds the image's pixels, in R, G, B order. The pixel at
// (x, y) starts at Pix[(y-Rect.Min.Y)*Stride + (x-Rect.Min.X)*4]. // (x, y) starts at Pix[(y-Rect.Min.Y)*Stride + (x-Rect.Min.X)*3].
Pix []uint8 Pix []uint8
// Stride is the Pix stride (in bytes) between vertically adjacent pixels. // Stride is the Pix stride (in bytes) between vertically adjacent pixels.
Stride int Stride int
@@ -80,7 +80,7 @@ func (p *NRGB) NRGBAt(x, y int) NRGBColor {
// PixOffset returns the index of the first element of Pix that corresponds to // PixOffset returns the index of the first element of Pix that corresponds to
// the pixel at (x, y). // the pixel at (x, y).
func (p *NRGB) PixOffset(x, y int) int { func (p *NRGB) PixOffset(x, y int) int {
return (y-p.Rect.Min.Y)*p.Stride + (x-p.Rect.Min.X)*4 return (y-p.Rect.Min.Y)*p.Stride + (x-p.Rect.Min.X)*3
} }
func (p *NRGB) Set(x, y int, c color.Color) { func (p *NRGB) Set(x, y int, c color.Color) {