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internal/graphicsdriver/opengl: Bug fix: getBufferSubData was available only with WebGL2

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This commit is contained in:
Hajime Hoshi
2021-04-06 00:09:50 +09:00
parent bd8367588e
commit 6fe6543b4b
2 changed files with 8 additions and 7 deletions
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10
internal/graphicsdriver/opengl/context_js.go
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@@ -587,15 +587,15 @@ func (c *context) replacePixelsWithPBO(buffer buffer, t textureNative, width, he
}
func (c *context) getBufferSubData(buffer buffer, width, height int) []byte {
if !isWebGL2Available {
panic("opengl: WebGL2 must be available when getBufferSubData is called")
}
gl := c.gl
gl.bindBuffer.Invoke(gles.PIXEL_UNPACK_BUFFER, js.Value(buffer))
l := 4 * width * height
arr := jsutil.TemporaryUint8Array(l, nil)
if isWebGL2Available {
gl.getBufferSubData.Invoke(gles.PIXEL_UNPACK_BUFFER, 0, arr, 0, l)
} else {
gl.getBufferSubData.Invoke(gles.PIXEL_UNPACK_BUFFER, 0, arr.Call("subarray", 0, l))
}
gl.getBufferSubData.Invoke(gles.PIXEL_UNPACK_BUFFER, 0, arr, 0, l)
gl.bindBuffer.Invoke(gles.PIXEL_UNPACK_BUFFER, nil)
return jsutil.Uint8ArrayToSlice(arr, l)
}