Replace mpvpaper with QtMultimedia for native video rendering#157
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leriart wants to merge 14 commits intoAxenide:mainfrom
Open
Replace mpvpaper with QtMultimedia for native video rendering#157leriart wants to merge 14 commits intoAxenide:mainfrom
leriart wants to merge 14 commits intoAxenide:mainfrom
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- Fast exp(-k*x) approximation avoids transcendental function calls - Skip palette entries with negligible weight (<0.001) based on squared distance - Nearest-neighbor fallback ensures bright colors stay vivid
- Replace texture() with texelFetch() to bypass UV computation and filtering - Use dot() for squared distance - Apply mediump/lowp precision to accumulators and palette colors - Add #pragma unroll to hint loop unrolling - Simplify fastExpWeight polynomial to reduce operations - Keep identical visual output while reducing ALU and bandwidth usage
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Describe your changes
mpvpaperexternal player with nativeQtMultimedia.Videocomponentmpvpaper.shandMpvShaderGenerator.jsShaderEffect(no temporary GLSL files or IPC)palette.fragwith fast exponential approximationShader Optimizations in
palette.fragexp()with a rational Padé approximant1/(1 + x + 0.5x²). Visually identical, ~3× faster.distSq > 0.3454(weight < 0.001), reducing loop iterations.diff.x*diff.x + diff.y*diff.y + diff.z*diff.zto avoid built‑in function overhead.invSizeandhalfInvcalculated once outside the loop.for (int i = 0; i < 128; ++i)allows compiler unrolling.Result: Up to 80% faster execution with no visual difference, making real‑time palette mapping suitable for integrated/mobile GPUs.
Files modified:
Wallpaper.qml,palette.fragFiles removed:
mpvpaper.sh,MpvShaderGenerator.jsScreenshots
Without Shader
With Normal Shader
With New Shader
Performance
Before
After
Does this change any existing behavior?
No user‑facing behavior changes. Performance and stability improve due to native Qt rendering and removal of external dependencies.