[18/30] libcamera: software_isp: egl: Use Texture Unit 3 for final output texture
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Message ID 20260618122245.946138-19-bryan.odonoghue@linaro.org
State New
Headers show
Series
  • RFC/RFT: gpuisp: Multipass with speed optimisations on top
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Commit Message

Bryan O'Donoghue June 18, 2026, 12:22 p.m. UTC 
We will use ping/pong buffers as intermediary steps in the GPUISP pipeline.
The last texture should logically be texture unit #3.

TEXTURE0 = Input
TEXTURE1 = Ping
TEXTURE2 = Pong
TEXTURE3 = Output

We don't have ping/pong yet but in preparation make the small change to
TEXTURE3 for the existing output framebuffer.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 src/libcamera/software_isp/software_isp_pipeline_gpu.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch
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diff --git a/src/libcamera/software_isp/software_isp_pipeline_gpu.cpp b/src/libcamera/software_isp/software_isp_pipeline_gpu.cpp
index 8bafd70f8..458b65854 100644
--- a/src/libcamera/software_isp/software_isp_pipeline_gpu.cpp
+++ b/src/libcamera/software_isp/software_isp_pipeline_gpu.cpp
@@ -336,7 +336,7 @@  int SoftwareIspPipelineGpu::start()
 	eglImageBayerIn_ = std::make_unique<eGLImage>(gpuIspShaderPassDemosiac_.glFormat_, inputConfig_.stride / gpuIspShaderPassDemosiac_.getBytesPerPixel(), height_, inputConfig_.stride, GL_TEXTURE0, 0);
 
 	/* Texture we will render to */
-	eglImageRGBAOut_ = std::make_unique<eGLImage>(GL_RGBA, outputSize_.width, outputSize_.height, outputConfig_.stride, GL_TEXTURE1, 1);
+	eglImageRGBAOut_ = std::make_unique<eGLImage>(GL_RGBA, outputSize_.width, outputSize_.height, outputConfig_.stride, GL_TEXTURE3, 3);
 
 	return 0;
 }