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WebGLTile: Properly render semi-transparent tiles #14983

Merged
merged 5 commits into from Aug 8, 2023
Merged

WebGLTile: Properly render semi-transparent tiles #14983

merged 5 commits into from Aug 8, 2023

Commits on Aug 8, 2023

  1. WebGL: Add depth buffer to PostProcessingPass and RenderTarget

    @puckipedia
    puckipedia committed Aug 8, 2023
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  2. webgl/Helper: Allow enabling depth testing 

    This uses the default GL_LESS depth function.
    @puckipedia
    puckipedia committed Aug 8, 2023
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  3. Do not discard transparent pixels 

    We still need to update the depth layer. This doesn't change normal
rendering behavior, either.
    @puckipedia
    puckipedia committed Aug 8, 2023
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  4. TileLayerBase: Clip tiles using depth 

    This changes the WebGL tile renderer to render tiles zoomed-in first,
using the depth buffer as to clip lower layers of tiles without blending
any transparent tiles. Any tile that uses alpha is drawn last, with the
highest possible Z, to allow blending with the lower layer of already drawn
tiles.
    @puckipedia
    puckipedia committed Aug 8, 2023
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  5. WebGL/Helper: use LEQUAL instead of LESS 

    The vector tile renderer depends on being able to render at the same
depth multiple times, for different vector tile layers.
    @puckipedia
    puckipedia committed Aug 8, 2023
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