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RGB888 format not working in eglCreateImageKHR

samicko over 6 years ago

I implemented an opengl-es application running on mali-400 gpu. I grab the 1280x960 RGB buffer from camera and render on GPU , I use zero copy operation using EGL_EXT_image_dma_buf_importextension.

My problem is that the Besler camera gives frames in RGB888 format.

but eglCreateImageKHR is working only if I give RGBA8888 format .

If I pass RGB888 to eglCreateImageKHR it gives black screen and also egl image returned is 0.

If I convert RGB888 data to RGBA8888 it works . but I don't want to do extra conversions for better performance. How can I use the RGB888 data with eglCreateImageKHR?

Please find the code below:

EGLint egl_img_attr[] = { EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
    EGL_DMA_BUF_PLANE0_FD_EXT, buffer->dbuf_fd,
    EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
    EGL_DMA_BUF_PLANE0_PITCH_EXT, TEX_WIDTH * 4,
    EGL_WIDTH, TEX_WIDTH,
    EGL_HEIGHT, TEX_HEIGHT,
    EGL_LINUX_DRM_FOURCC_EXT, DRM_FORMAT_RGBA8888 ,             
    EGL_NONE, EGL_NONE };

buffer->egl_img = eglCreateImageKHR(egl_dpy, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, (EGLClientBuffer)0, egl_img_attr);

Top replies

Peter Harris over 6 years ago +1 suggested

Hi samicko, Looking at the code here I think it should be supported, although without knowing what error is being thrown it's hard to tell where it's failing. For next steps can you: Check the eglGetError...

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0 axelv over 4 years ago in reply to Peter Harris

Hi Peter,

I got the same error as mentioned above. I can't create an RGB texture but an RGBA texture. The DRM framebuffer format is AR24. Is there a list which formats are supported?

When calling:

EGLint egl_img_attr[] = { EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
    EGL_DMA_BUF_PLANE0_FD_EXT, buffer->dbuf_fd,
    EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
    EGL_DMA_BUF_PLANE0_PITCH_EXT, TEX_WIDTH * 3,
    EGL_WIDTH, TEX_WIDTH,
    EGL_HEIGHT, TEX_HEIGHT,
    EGL_LINUX_DRM_FOURCC_EXT, DRM_FORMAT_RGB888 ,             
    EGL_NONE, EGL_NONE };

glCreateImageKHR(egl_dpy, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, (EGLClientBuffer)0, egl_img_attr);

I get error 0x3009 (EGL_BAD_MATCH).

Is the OpenSource Lima driver a better alternative.

My EGL version is: 1.4 Linux-r9p0-01rel0 ?

Thanks and best regards.

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