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gpu/internal/opengl: fix glCopyTexSubImage2D on Samsung J2

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To use glCopyTexSubImage2D on the Samsung J2 it's not enough to
set GL_READ_FRAMEBUFFER. This change binds GL_FRAMEBUFFER, setting both
READ_FRAMEBUFFER and DRAW_FRAMEBUFFER, fixing the issue.

Setting only GL_READ_FRAMEBUFFER was also a genuine bug, because OpenGL
ES 2.0 doesn't support it.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2021-09-23 09:49:09 +02:00
parent 6665e0ef0f
commit d9effdad8e
1 changed files with 1 additions and 1 deletions
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gpu/internal/opengl/opengl.go
+1 -1
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@@ -1123,7 +1123,7 @@ func (b *Backend) CopyTexture(dst driver.Texture, dstOrigin image.Point, src dri
b.glstate.bindTexture(b.funcs, unit, oldTex)
}()
b.glstate.bindTexture(b.funcs, unit, dst.(*texture).obj)
b.glstate.bindFramebuffer(b.funcs, gl.READ_FRAMEBUFFER, src.(*texture).ensureFBO())
b.glstate.bindFramebuffer(b.funcs, gl.FRAMEBUFFER, src.(*texture).ensureFBO())
sz := srcRect.Size()
b.funcs.CopyTexSubImage2D(gl.TEXTURE_2D, 0, dstOrigin.X, dstOrigin.Y, srcRect.Min.X, srcRect.Min.Y, sz.X, sz.Y)
}