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Fri, 19 Feb 2021 21:50:24 -0800 (PST) MIME-Version: 1.0 References: <20210219094803.90860-1-akihiko.odaki@gmail.com> <20210219141446.ne2mutkfa5pa2dhu@sirius.home.kraxel.org> In-Reply-To: <20210219141446.ne2mutkfa5pa2dhu@sirius.home.kraxel.org> From: Akihiko Odaki Date: Sat, 20 Feb 2021 14:50:14 +0900 Message-ID: Subject: Re: [PATCH] opengl: Do not convert format with glTexImage2D on OpenGL ES To: Gerd Hoffmann Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::631; envelope-from=akihiko.odaki@gmail.com; helo=mail-ej1-x631.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu Developers Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 2021=E5=B9=B42=E6=9C=8819=E6=97=A5(=E9=87=91) 23:14 Gerd Hoffmann : > > On Fri, Feb 19, 2021 at 06:48:03PM +0900, Akihiko Odaki wrote: > > OpenGL ES does not support conversion from the given data format > > to the internal format with glTexImage2D. > > > > Use the given data format as the internal format, and ignore > > the given alpha channels with GL_TEXTURE_SWIZZLE_A in case the > > format contains alpha channels. > > Hmm. Do you know what effect this has performance-wise? > Is it maybe useful to not convert for desktop gl too? I have no idea about performance, but I am concerned about compatibility. OpenGL 4.6 core profile does not support GL_BGRA, which is aliased as GL_BGRA_EXT by epoxy, as internalformat. I also tested with Intel HD Graphics 3000/Mesa 20.3.4 but it didn't work. > > take care, > Gerd >