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[core] Enable opaque pass for background layer. fix heatmap+background test.

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Follow the approach from mapbox-gl-js for enabling opaque pass for background layer (same as for fill layer).

Fix combinations/heatmap-translucent--background-opaque render test.
This commit is contained in:
Aleksandar Stojiljkovic
2019-08-01 12:23:04 +03:00
parent c523391b20
commit 8103a2b028
3 changed files with 21 additions and 13 deletions
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20
src/mbgl/renderer/layers/render_background_layer.cpp
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@@ -37,8 +37,14 @@ void RenderBackgroundLayer::evaluate(const PropertyEvaluationParameters &paramet
parameters.getCrossfadeParameters(),
unevaluated.evaluate(parameters));
passes = properties->evaluated.get<style::BackgroundOpacity>() > 0 ? RenderPass::Translucent
: RenderPass::None;
passes = properties->evaluated.get<style::BackgroundOpacity>() == 0.0f
? RenderPass::None
: (!unevaluated.get<style::BackgroundPattern>().isUndefined()
|| properties->evaluated.get<style::BackgroundOpacity>() < 1.0f
|| properties->evaluated.get<style::BackgroundColor>().a < 1.0f)
? RenderPass::Translucent
// Supply both - evaluated based on opaquePassCutoff in render().
: RenderPass::Opaque | RenderPass::Translucent;
properties->renderPasses = mbgl::underlying_type(passes);
evaluatedProperties = std::move(properties);
}
@@ -77,7 +83,9 @@ void RenderBackgroundLayer::render(PaintParameters& parameters) {
parameters.context,
*parameters.renderPass,
gfx::Triangles(),
parameters.depthModeForSublayer(0, gfx::DepthMaskType::ReadOnly),
parameters.depthModeForSublayer(0, parameters.pass == RenderPass::Opaque
? gfx::DepthMaskType::ReadWrite
: gfx::DepthMaskType::ReadOnly),
gfx::StencilMode::disabled(),
parameters.colorModeForRenderPass(),
gfx::CullFaceMode::disabled(),
@@ -118,6 +126,12 @@ void RenderBackgroundLayer::render(PaintParameters& parameters) {
);
}
} else {
auto backgroundRenderPass = (evaluated.get<BackgroundColor>().a >= 1.0f
&& evaluated.get<BackgroundOpacity>() >= 1.0f
&& parameters.currentLayer >= parameters.opaquePassCutoff) ? RenderPass::Opaque : RenderPass::Translucent;
if (parameters.pass != backgroundRenderPass) {
return;
}
for (const auto& tileID : util::tileCover(parameters.state, parameters.state.getIntegerZoom())) {
draw(
parameters.programs.getBackgroundLayerPrograms().background,