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#include <mbgl/renderer/layers/render_background_layer.hpp>
#include <mbgl/style/layers/background_layer_impl.hpp>
#include <mbgl/renderer/bucket.hpp>
#include <mbgl/renderer/paint_parameters.hpp>
#include <mbgl/renderer/image_manager.hpp>
#include <mbgl/renderer/render_static_data.hpp>
#include <mbgl/programs/programs.hpp>
#include <mbgl/programs/background_program.hpp>
#include <mbgl/util/tile_cover.hpp>
#include <mbgl/map/transform_state.hpp>
#include <mbgl/gfx/cull_face_mode.hpp>
namespace mbgl {
using namespace style;
inline const BackgroundLayer::Impl& impl(const Immutable<style::Layer::Impl>& impl) {
return static_cast<const style::BackgroundLayer::Impl&>(*impl);
}
RenderBackgroundLayer::RenderBackgroundLayer(Immutable<style::BackgroundLayer::Impl> _impl)
: RenderLayer(makeMutable<BackgroundLayerProperties>(std::move(_impl))),
unevaluated(impl(baseImpl).paint.untransitioned()) {
}
RenderBackgroundLayer::~RenderBackgroundLayer() = default;
void RenderBackgroundLayer::transition(const TransitionParameters ¶meters) {
unevaluated = impl(baseImpl).paint.transitioned(parameters, std::move(unevaluated));
}
void RenderBackgroundLayer::evaluate(const PropertyEvaluationParameters ¶meters) {
auto properties = makeMutable<BackgroundLayerProperties>(
staticImmutableCast<BackgroundLayer::Impl>(baseImpl),
parameters.getCrossfadeParameters(),
unevaluated.evaluate(parameters));
passes = properties->evaluated.get<style::BackgroundOpacity>() > 0 ? RenderPass::Translucent
: RenderPass::None;
evaluatedProperties = std::move(properties);
}
bool RenderBackgroundLayer::hasTransition() const {
return unevaluated.hasTransition();
}
bool RenderBackgroundLayer::hasCrossfade() const {
return getCrossfade<BackgroundLayerProperties>(evaluatedProperties).t != 1;
}
void RenderBackgroundLayer::render(PaintParameters& parameters, RenderSource*) {
// Note that for bottommost layers without a pattern, the background color is drawn with
// glClear rather than this method.
const Properties<>::PossiblyEvaluated properties;
const BackgroundProgram::Binders paintAttributeData(properties, 0);
auto draw = [&](auto& program, auto&& uniformValues, const auto& textureBindings) {
const auto allUniformValues = program.computeAllUniformValues(
std::move(uniformValues),
paintAttributeData,
properties,
parameters.state.getZoom()
);
const auto allAttributeBindings = program.computeAllAttributeBindings(
parameters.staticData.tileVertexBuffer,
paintAttributeData,
properties
);
checkRenderability(parameters, program.activeBindingCount(allAttributeBindings));
program.draw(
parameters.context,
*parameters.renderPass,
gfx::Triangles(),
parameters.depthModeForSublayer(0, gfx::DepthMaskType::ReadOnly),
gfx::StencilMode::disabled(),
parameters.colorModeForRenderPass(),
gfx::CullFaceMode::disabled(),
parameters.staticData.quadTriangleIndexBuffer,
parameters.staticData.tileTriangleSegments,
allUniformValues,
allAttributeBindings,
textureBindings,
getID()
);
};
const auto& evaluated = static_cast<const BackgroundLayerProperties&>(*evaluatedProperties).evaluated;
const auto& crossfade = static_cast<const BackgroundLayerProperties&>(*evaluatedProperties).crossfade;
if (!evaluated.get<BackgroundPattern>().to.empty()) {
optional<ImagePosition> imagePosA = parameters.imageManager.getPattern(evaluated.get<BackgroundPattern>().from);
optional<ImagePosition> imagePosB = parameters.imageManager.getPattern(evaluated.get<BackgroundPattern>().to);
if (!imagePosA || !imagePosB)
return;
for (const auto& tileID : util::tileCover(parameters.state, parameters.state.getIntegerZoom())) {
draw(
parameters.programs.getBackgroundLayerPrograms().backgroundPattern,
BackgroundPatternProgram::layoutUniformValues(
parameters.matrixForTile(tileID),
evaluated.get<BackgroundOpacity>(),
parameters.imageManager.getPixelSize(),
*imagePosA,
*imagePosB,
crossfade,
tileID,
parameters.state
),
BackgroundPatternProgram::TextureBindings{
textures::image::Value{ parameters.imageManager.textureBinding(parameters.context) },
}
);
}
} else {
for (const auto& tileID : util::tileCover(parameters.state, parameters.state.getIntegerZoom())) {
draw(
parameters.programs.getBackgroundLayerPrograms().background,
BackgroundProgram::LayoutUniformValues {
uniforms::matrix::Value( parameters.matrixForTile(tileID) ),
uniforms::color::Value( evaluated.get<BackgroundColor>() ),
uniforms::opacity::Value( evaluated.get<BackgroundOpacity>() ),
},
BackgroundProgram::TextureBindings{}
);
}
}
}
optional<Color> RenderBackgroundLayer::getSolidBackground() const {
const auto& evaluated = static_cast<const BackgroundLayerProperties&>(*evaluatedProperties).evaluated;
if (!evaluated.get<BackgroundPattern>().from.empty()) {
return nullopt;
}
return { evaluated.get<BackgroundColor>() * evaluated.get<BackgroundOpacity>() };
}
} // namespace mbgl
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