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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)
}

5
internal/graphicsdriver/opengl/gl_js.go
View File

@ -112,7 +112,6 @@ func newGL(v js.Value) *gl {
enableVertexAttribArray: v.Get("enableVertexAttribArray").Call("bind", v),
framebufferTexture2D: v.Get("framebufferTexture2D").Call("bind", v),
flush: v.Get("flush").Call("bind", v),
getBufferSubData: v.Get("getBufferSubData").Call("bind", v),
getParameter: v.Get("getParameter").Call("bind", v),
getProgramInfoLog: v.Get("getProgramInfoLog").Call("bind", v),
getProgramParameter: v.Get("getProgramParameter").Call("bind", v),
@ -145,7 +144,9 @@ func newGL(v js.Value) *gl {
vertexAttribPointer: v.Get("vertexAttribPointer").Call("bind", v),
viewport: v.Get("viewport").Call("bind", v),
}
if !isWebGL2Available {
if isWebGL2Available {
g.getExtension = v.Get("getBufferSubData").Call("bind", v)
} else {
g.getExtension = v.Get("getExtension").Call("bind", v)
}
return g