49 lines
1.3 KiB
Odin
49 lines
1.3 KiB
Odin
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package texture
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import "../image"
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import "core:math"
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import gl "vendor:OpenGL"
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import "core:fmt"
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@(require_results)
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load :: proc(
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img: image.Image,
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image_error: image.Error = nil,
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) -> (
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texture: Texture,
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image_error_fallthrough: image.Error,
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) {
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image_error_fallthrough = image_error
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gl.CreateTextures(gl.TEXTURE_2D, 1, &texture.id)
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mipmap_levels := math.log2(f32(max(img.width, img.height))) + 1
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// fmt.printfln("{}, {}: using {} levels", img.width, img.height, mipmap_levels)
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gl.TextureStorage2D(texture.id, i32(mipmap_levels), gl.RGBA8, img.width, img.height)
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gl.TextureSubImage2D(
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texture.id,
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0,
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0,
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0,
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img.width,
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img.height,
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gl.RGBA,
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gl.UNSIGNED_BYTE,
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&img.pixels[0],
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)
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max_aniso: f32
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gl.GetFloatv(gl.MAX_TEXTURE_MAX_ANISOTROPY, &max_aniso)
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gl.TextureParameterf(texture.id, gl.TEXTURE_MAX_ANISOTROPY, max_aniso)
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gl.TextureParameteri(texture.id, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
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gl.TextureParameteri(texture.id, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
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//
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// gl.TextureParameteri(texture.id, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
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// gl.TextureParameteri(texture.id, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
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gl.GenerateTextureMipmap(texture.id)
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return
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}
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