[libcamera-devel,0/7] qcam: Accelerate packed YUV rendering with OpenGL
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Message ID 20200916145254.1644-1-laurent.pinchart@ideasonboard.com
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  • qcam: Accelerate packed YUV rendering with OpenGL
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Laurent Pinchart Sept. 16, 2020, 2:52 p.m. UTC 
Hello,

This patch series adds a shader to convert packed YUV formats to RGB. It
has been developed as I reviewed Show's OpenGL support work, to help me
understand the OpenGL and GLSL code.

The series starts with a few cleanups in patches 1/7 to 3/7. It then
renames shader files in 4/7 to prepare for packed YUV support, and adds
support for preprocessor macros in the shaders in 5/7. Patch 6/7 uses
macros to select the YUV pattern in the semi-planar fragment shader,
instead of duplicating the shader code. Finally, patch 7/7 adds a
fragment shader for YUYV.

Laurent Pinchart (7):
  qcam: Remove unneeded './' file prefix in *.qrc
  qcam: viewfinder_gl: Don't store texture IDs in class members
  qcam: viewfinder_gl: Hardcode the vertex shader file name
  qcam: viewfinder_gl: Rename shader files
  qcam: viewfinder_gl: Support #define in shaders
  qcam: viewfinder_gl: Merge the semi-planar UV and VU shaders
  qcam: viewfinder_gl: Add shader to render packed YUV formats

 src/qcam/assets/feathericons/feathericons.qrc |  12 +-
 src/qcam/assets/shader/NV_2_planes_VU_f.glsl  |  32 ----
 .../{NV_vertex_shader.glsl => YUV.vert}       |   2 +-
 ...V_2_planes_UV_f.glsl => YUV_2_planes.frag} |   9 +-
 .../{NV_3_planes_f.glsl => YUV_3_planes.frag} |   2 +-
 src/qcam/assets/shader/YUV_packed.frag        |  82 +++++++++++
 src/qcam/assets/shader/shaders.qrc            |   8 +-
 src/qcam/viewfinder_gl.cpp                    | 137 +++++++++++++-----
 src/qcam/viewfinder_gl.h                      |  18 +--
 9 files changed, 212 insertions(+), 90 deletions(-)
 delete mode 100644 src/qcam/assets/shader/NV_2_planes_VU_f.glsl
 rename src/qcam/assets/shader/{NV_vertex_shader.glsl => YUV.vert} (79%)
 rename src/qcam/assets/shader/{NV_2_planes_UV_f.glsl => YUV_2_planes.frag} (68%)
 rename src/qcam/assets/shader/{NV_3_planes_f.glsl => YUV_3_planes.frag} (90%)
 create mode 100644 src/qcam/assets/shader/YUV_packed.frag