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#include <mbgl/renderer/layers/render_raster_layer.hpp>
#include <mbgl/renderer/buckets/raster_bucket.hpp>
#include <mbgl/renderer/render_tile.hpp>
#include <mbgl/renderer/paint_parameters.hpp>
#include <mbgl/renderer/render_static_data.hpp>
#include <mbgl/renderer/sources/render_image_source.hpp>
#include <mbgl/programs/programs.hpp>
#include <mbgl/programs/raster_program.hpp>
#include <mbgl/tile/tile.hpp>
#include <mbgl/gfx/cull_face_mode.hpp>
#include <mbgl/style/layers/raster_layer_impl.hpp>
namespace mbgl {
using namespace style;
namespace {
inline const RasterLayer::Impl& impl_cast(const Immutable<style::Layer::Impl>& impl) {
assert(impl->getTypeInfo() == RasterLayer::Impl::staticTypeInfo());
return static_cast<const RasterLayer::Impl&>(*impl);
}
} // namespace
RenderRasterLayer::RenderRasterLayer(Immutable<style::RasterLayer::Impl> _impl)
: RenderLayer(makeMutable<RasterLayerProperties>(std::move(_impl))),
unevaluated(impl_cast(baseImpl).paint.untransitioned()) {}
RenderRasterLayer::~RenderRasterLayer() = default;
void RenderRasterLayer::transition(const TransitionParameters& parameters) {
unevaluated = impl_cast(baseImpl).paint.transitioned(parameters, std::move(unevaluated));
}
void RenderRasterLayer::evaluate(const PropertyEvaluationParameters& parameters) {
auto properties = makeMutable<RasterLayerProperties>(
staticImmutableCast<RasterLayer::Impl>(baseImpl),
unevaluated.evaluate(parameters));
passes = properties->evaluated.get<style::RasterOpacity>() > 0 ? RenderPass::Translucent : RenderPass::None;
properties->renderPasses = mbgl::underlying_type(passes);
evaluatedProperties = std::move(properties);
}
bool RenderRasterLayer::hasTransition() const {
return unevaluated.hasTransition();
}
bool RenderRasterLayer::hasCrossfade() const {
return false;
}
static float saturationFactor(float saturation) {
if (saturation > 0) {
return 1 - 1 / (1.001 - saturation);
} else {
return -saturation;
}
}
static float contrastFactor(float contrast) {
if (contrast > 0) {
return 1 / (1 - contrast);
} else {
return 1 + contrast;
}
}
static std::array<float, 3> spinWeights(float spin) {
spin *= util::DEG2RAD;
float s = std::sin(spin);
float c = std::cos(spin);
std::array<float, 3> spin_weights = {{
(2 * c + 1) / 3,
(-std::sqrt(3.0f) * s - c + 1) / 3,
(std::sqrt(3.0f) * s - c + 1) / 3
}};
return spin_weights;
}
void RenderRasterLayer::prepare(const LayerPrepareParameters& params) {
renderTiles = params.source->getRenderTiles();
imageData = params.source->getImageRenderData();
// It is possible image data is not available until the source loads it.
assert(renderTiles || imageData || !params.source->isEnabled());
}
void RenderRasterLayer::render(PaintParameters& parameters) {
if (parameters.pass != RenderPass::Translucent || (!renderTiles && !imageData)) {
return;
}
const auto& evaluated = static_cast<const RasterLayerProperties&>(*evaluatedProperties).evaluated;
RasterProgram::Binders paintAttributeData{ evaluated, 0 };
auto draw = [&] (const mat4& matrix,
const auto& vertexBuffer,
const auto& indexBuffer,
const auto& segments,
const auto& textureBindings,
const std::string& drawScopeID) {
auto& programInstance = parameters.programs.getRasterLayerPrograms().raster;
const auto allUniformValues = RasterProgram::computeAllUniformValues(
RasterProgram::LayoutUniformValues{
uniforms::matrix::Value(matrix),
uniforms::opacity::Value(evaluated.get<RasterOpacity>()),
uniforms::fade_t::Value(1),
uniforms::brightness_low::Value(evaluated.get<RasterBrightnessMin>()),
uniforms::brightness_high::Value(evaluated.get<RasterBrightnessMax>()),
uniforms::saturation_factor::Value(saturationFactor(evaluated.get<RasterSaturation>())),
uniforms::contrast_factor::Value(contrastFactor(evaluated.get<RasterContrast>())),
uniforms::spin_weights::Value(spinWeights(evaluated.get<RasterHueRotate>())),
uniforms::buffer_scale::Value(1.0f),
uniforms::scale_parent::Value(1.0f),
uniforms::tl_parent::Value(std::array<float, 2>{{0.0f, 0.0f}}),
},
paintAttributeData,
evaluated,
parameters.state.getZoom());
const auto allAttributeBindings =
RasterProgram::computeAllAttributeBindings(vertexBuffer, paintAttributeData, evaluated);
checkRenderability(parameters, RasterProgram::activeBindingCount(allAttributeBindings));
programInstance.draw(
parameters.context,
*parameters.renderPass,
gfx::Triangles(),
parameters.depthModeForSublayer(0, gfx::DepthMaskType::ReadOnly),
gfx::StencilMode::disabled(),
parameters.colorModeForRenderPass(),
gfx::CullFaceMode::disabled(),
indexBuffer,
segments,
allUniformValues,
allAttributeBindings,
textureBindings,
getID() + "/" + drawScopeID
);
};
const gfx::TextureFilterType filter = evaluated.get<RasterResampling>() == RasterResamplingType::Nearest ? gfx::TextureFilterType::Nearest : gfx::TextureFilterType::Linear;
if (imageData && !imageData->bucket->needsUpload()) {
RasterBucket& bucket = *imageData->bucket;
assert(bucket.texture);
size_t i = 0;
for (const auto& matrix_ : imageData->matrices) {
draw(matrix_,
*bucket.vertexBuffer,
*bucket.indexBuffer,
bucket.segments,
RasterProgram::TextureBindings{
textures::image0::Value{bucket.texture->getResource(), filter},
textures::image1::Value{bucket.texture->getResource(), filter},
},
std::to_string(i++));
}
} else if (renderTiles) {
for (const RenderTile& tile : *renderTiles) {
auto* bucket_ = tile.getBucket(*baseImpl);
if (!bucket_) {
continue;
}
auto& bucket = static_cast<RasterBucket&>(*bucket_);
if (!bucket.hasData())
continue;
assert(bucket.texture);
if (bucket.vertexBuffer && bucket.indexBuffer) {
// Draw only the parts of the tile that aren't drawn by another tile in the layer.
draw(parameters.matrixForTile(tile.id, true),
*bucket.vertexBuffer,
*bucket.indexBuffer,
bucket.segments,
RasterProgram::TextureBindings{
textures::image0::Value{bucket.texture->getResource(), filter},
textures::image1::Value{bucket.texture->getResource(), filter},
},
"image");
} else {
// Draw the full tile.
if (bucket.segments.empty()) {
// Copy over the segments so that we can create our own DrawScopes.
bucket.segments = RenderStaticData::rasterSegments();
}
draw(parameters.matrixForTile(tile.id, true),
*parameters.staticData.rasterVertexBuffer,
*parameters.staticData.quadTriangleIndexBuffer,
bucket.segments,
RasterProgram::TextureBindings{
textures::image0::Value{bucket.texture->getResource(), filter},
textures::image1::Value{bucket.texture->getResource(), filter},
},
"image");
}
}
}
}
} // namespace mbgl
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