英文:
OpenGL texture from SDL Surface in Go
问题
我正在使用go-sdl2和go-gl，并尝试从sdl surface创建一个gl纹理。在C语言中，我会通过调用glTexImage2D并将surface->pixels作为最后一个参数来实现。然而，在go-sdl中，pixels是一个私有字段，而且我应该使用Pixels()来访问它，但它返回的是[]byte类型，与期望最后一个参数为unsafe.Pointer的gl.TexImage2D不兼容。
image, err := img.Load("img.png")
if err != nil {
//...
}
var texture uint32
gl.GenTextures(1, &texture)
gl.BindTexture(gl.TEXTURE_2D, texture)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, image.W, image.H, 0, gl.RGBA, gl.UNSIGNED_BYTE, image.Pixels())
> cannot use image.Pixels() (value of type []byte) as type unsafe.Pointer in argument to gl.TexImage2D
那么在Go语言中，从sdl surface创建gl纹理的正确方法是什么呢？
英文:
I'm using go-sdl2 and go-gl and I'm trying to create a gl texture from sdl surface. In C I would do that by calling glTexImage2D with surface->pixels as the last argument. In go-sdl, however, pixels is a private field and Pixels() (that I'm supposed to use to access it) returns []byte, which is incompatible with gl.TexImage2D that expects the last argument to be an unsafe.Pointer.
image, err := img.Load("img.png")
if err != nil {
//...
}
var texture uint32
gl.GenTextures(1, &texture)
gl.BindTexture(gl.TEXTURE_2D, texture)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, image.W, image.H, 0, gl.RGBA, gl.UNSIGNED_BYTE, image.Pixels())
> cannot use image.Pixels() (value of type []byte) as type unsafe.Pointer in argument to gl.TexImage2D
So what would be the proper way of creating gl texture from sdl surface in go?
答案1
得分: 0
原文翻译如下：
原来有一个名为 Surface.Data 的函数可以返回实际的指针。
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, image.W, image.H, 0, gl.RGBA, gl.UNSIGNED_BYTE, image.Data())
英文:
It turns out that there is Surface.Data function that returns the actual pointer.
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, image.W, image.H, 0, gl.RGBA, gl.UNSIGNED_BYTE, image.Data())
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