[21/30] libcamera: software_isp: egl: Add createOutputTexture2D
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Message ID 20260618122245.946138-22-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 
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
 include/libcamera/internal/egl.h |  1 +
 src/libcamera/egl.cpp            | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

Patch
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diff --git a/include/libcamera/internal/egl.h b/include/libcamera/internal/egl.h
index 182a4dc55..d3749d2e7 100644
--- a/include/libcamera/internal/egl.h
+++ b/include/libcamera/internal/egl.h
@@ -107,6 +107,7 @@  public:
 	int createInputDMABufTexture2D(eGLImage &eglImage, int fd);
 	int createOutputDMABufTexture2D(eGLImage &eglImage, int fd);
 	void createInputTexture2D(eGLImage &eglImage, void *data);
+	void createOutputTexture2D(eGLImage &eglImage);
 
 	int attachTextureToFBO(eGLImage &eglImage);
 
diff --git a/src/libcamera/egl.cpp b/src/libcamera/egl.cpp
index ffaa6bc49..8d135e092 100644
--- a/src/libcamera/egl.cpp
+++ b/src/libcamera/egl.cpp
@@ -297,6 +297,22 @@  void eGL::createInputTexture2D(eGLImage &eglImage, void *data)
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 }
 
+/**
+ * \brief Create a 2D texture attached to an FBO for render-to-texture
+ * \param[in,out] eglImage EGL image to associate with the texture
+ * \param[in] format OpenGL internal format (e.g., GL_RGB, GL_RGBA)
+ *
+ * Creates a 2D texture in VRAM. The texture
+ * is configured with nearest filtering and clamp-to-edge wrapping. This
+ * is useful for uploading static data like lookup tables or uniform color
+ * matrices to the GPU.
+ */
+void eGL::createOutputTexture2D(eGLImage &eglImage)
+{
+	createInputTexture2D(eglImage, NULL);
+	attachTextureToFBO(eglImage);
+}
+
 /**
  * \brief Initialise the EGL context
  *