255 lines
9.8 KiB
C++
255 lines
9.8 KiB
C++
#include <mbgl/renderer/painter.hpp>
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#include <mbgl/renderer/symbol_bucket.hpp>
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#include <mbgl/style/style_layer.hpp>
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#include <mbgl/style/style_properties.hpp>
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#include <mbgl/geometry/glyph_atlas.hpp>
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#include <mbgl/geometry/sprite_atlas.hpp>
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#include <mbgl/shader/sdf_shader.hpp>
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#include <mbgl/shader/icon_shader.hpp>
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#include <mbgl/shader/box_shader.hpp>
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#include <mbgl/map/tile_id.hpp>
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#include <mbgl/map/map_data.hpp>
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#include <mbgl/util/math.hpp>
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#include <cmath>
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using namespace mbgl;
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template <typename BucketProperties, typename StyleProperties>
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void Painter::renderSDF(SymbolBucket &bucket,
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const TileID &id,
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const mat4 &matrix,
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const BucketProperties& bucketProperties,
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const StyleProperties& styleProperties,
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float sdfFontSize,
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std::array<float, 2> texsize,
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SDFShader& sdfShader,
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void (SymbolBucket::*drawSDF)(SDFShader&))
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{
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mat4 vtxMatrix = translatedMatrix(matrix, styleProperties.translate, id, styleProperties.translate_anchor);
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bool aligned_with_map = (bucketProperties.rotation_alignment == RotationAlignmentType::Map);
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bool skewed = aligned_with_map;
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mat4 exMatrix;
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float s;
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float gammaScale;
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if (skewed) {
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matrix::identity(exMatrix);
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s = 4096.0f / util::tileSize / id.overscaling / std::pow(2, state.getZoom() - id.z);
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gammaScale = 1.0f / std::cos(state.getPitch());
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} else {
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exMatrix = extrudeMatrix;
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s = state.getAltitude();
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gammaScale = 1.0f;
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}
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matrix::scale(exMatrix, exMatrix, s, s, 1);
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// If layerStyle.size > bucket.info.fontSize then labels may collide
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float fontSize = styleProperties.size;
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float fontScale = fontSize / sdfFontSize;
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matrix::scale(exMatrix, exMatrix, fontScale, fontScale, 1.0f);
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// calculate how much longer the real world distance is at the top of the screen
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// than at the middle of the screen.
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float topedgelength = std::sqrt(std::pow(state.getHeight(), 2) / 4.0f * (1.0f + std::pow(state.getAltitude(), 2)));
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float x = state.getHeight() / 2.0f * std::tan(state.getPitch());
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float extra = (topedgelength + x) / topedgelength - 1;
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useProgram(sdfShader.program);
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sdfShader.u_matrix = vtxMatrix;
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sdfShader.u_exmatrix = exMatrix;
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sdfShader.u_texsize = texsize;
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sdfShader.u_skewed = skewed;
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sdfShader.u_extra = extra;
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// adjust min/max zooms for variable font sies
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float zoomAdjust = std::log(fontSize / bucketProperties.size) / std::log(2);
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sdfShader.u_zoom = (state.getNormalizedZoom() - zoomAdjust) * 10; // current zoom level
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FadeProperties f = frameHistory.getFadeProperties(data.getAnimationTime(), data.getDefaultFadeDuration());
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sdfShader.u_fadedist = f.fadedist * 10;
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sdfShader.u_minfadezoom = std::floor(f.minfadezoom * 10);
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sdfShader.u_maxfadezoom = std::floor(f.maxfadezoom * 10);
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sdfShader.u_fadezoom = (state.getNormalizedZoom() + f.bump) * 10;
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// The default gamma value has to be adjust for the current pixelratio so that we're not
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// drawing blurry font on retina screens.
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const float gamma = 0.105 * sdfFontSize / fontSize / data.pixelRatio;
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const float sdfPx = 8.0f;
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const float blurOffset = 1.19f;
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const float haloOffset = 6.0f;
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// We're drawing in the translucent pass which is bottom-to-top, so we need
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// to draw the halo first.
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if (styleProperties.halo_color[3] > 0.0f && styleProperties.halo_width > 0.0f) {
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sdfShader.u_gamma = (styleProperties.halo_blur * blurOffset / fontScale / sdfPx + gamma) * gammaScale;
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if (styleProperties.opacity < 1.0f) {
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Color color = styleProperties.halo_color;
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color[0] *= styleProperties.opacity;
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color[1] *= styleProperties.opacity;
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color[2] *= styleProperties.opacity;
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color[3] *= styleProperties.opacity;
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sdfShader.u_color = color;
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} else {
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sdfShader.u_color = styleProperties.halo_color;
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}
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sdfShader.u_buffer = (haloOffset - styleProperties.halo_width / fontScale) / sdfPx;
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setDepthSublayer(0);
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(bucket.*drawSDF)(sdfShader);
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}
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// Then, we draw the text/icon over the halo
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if (styleProperties.color[3] > 0.0f) {
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sdfShader.u_gamma = gamma * gammaScale;
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if (styleProperties.opacity < 1.0f) {
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Color color = styleProperties.color;
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color[0] *= styleProperties.opacity;
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color[1] *= styleProperties.opacity;
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color[2] *= styleProperties.opacity;
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color[3] *= styleProperties.opacity;
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sdfShader.u_color = color;
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} else {
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sdfShader.u_color = styleProperties.color;
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}
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sdfShader.u_buffer = (256.0f - 64.0f) / 256.0f;
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setDepthSublayer(1);
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(bucket.*drawSDF)(sdfShader);
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}
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}
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void Painter::renderSymbol(SymbolBucket &bucket, const StyleLayer &layer_desc, const TileID &id, const mat4 &matrix) {
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// Abort early.
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if (pass == RenderPass::Opaque) {
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return;
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}
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const auto& properties = layer_desc.getProperties<SymbolPaintProperties>();
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const auto& layout = bucket.layout;
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config.depthMask = GL_FALSE;
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if (bucket.hasCollisionBoxData()) {
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config.stencilTest = true;
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useProgram(collisionBoxShader->program);
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collisionBoxShader->u_matrix = matrix;
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collisionBoxShader->u_scale = std::pow(2, state.getNormalizedZoom() - id.z);
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collisionBoxShader->u_zoom = state.getNormalizedZoom() * 10;
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collisionBoxShader->u_maxzoom = (id.z + 1) * 10;
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lineWidth(1.0f);
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setDepthSublayer(0);
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bucket.drawCollisionBoxes(*collisionBoxShader);
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}
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// TODO remove the `|| true` when #1673 is implemented
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const bool drawAcrossEdges = !(layout.text.allow_overlap || layout.icon.allow_overlap ||
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layout.text.ignore_placement || layout.icon.ignore_placement) || true;
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// Disable the stencil test so that labels aren't clipped to tile boundaries.
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//
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// Layers with features that may be drawn overlapping aren't clipped. These
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// layers are sorted in the y direction, and to draw the correct ordering near
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// tile edges the icons are included in both tiles and clipped when drawing.
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config.stencilTest = drawAcrossEdges ? false : true;
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if (bucket.hasIconData()) {
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config.depthTest = layout.icon.rotation_alignment == RotationAlignmentType::Map;
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bool sdf = bucket.sdfIcons;
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const float angleOffset =
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layout.icon.rotation_alignment == RotationAlignmentType::Map
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? state.getAngle()
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: 0;
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const float fontSize = properties.icon.size;
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const float fontScale = fontSize / 1.0f;
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spriteAtlas->bind(state.isChanging() || layout.placement == PlacementType::Line
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|| angleOffset != 0 || fontScale != 1 || sdf || state.getPitch() != 0);
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if (sdf) {
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renderSDF(bucket,
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id,
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matrix,
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layout.icon,
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properties.icon,
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1.0f,
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{{ float(spriteAtlas->getWidth()) / 4.0f, float(spriteAtlas->getHeight()) / 4.0f }},
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*sdfIconShader,
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&SymbolBucket::drawIcons);
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} else {
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mat4 vtxMatrix = translatedMatrix(matrix, properties.icon.translate, id, properties.icon.translate_anchor);
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bool skewed = layout.icon.rotation_alignment == RotationAlignmentType::Map;
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mat4 exMatrix;
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float s;
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if (skewed) {
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matrix::identity(exMatrix);
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s = 4096.0f / util::tileSize / id.overscaling / std::pow(2, state.getZoom() - id.z);
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} else {
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exMatrix = extrudeMatrix;
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s = state.getAltitude();
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}
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matrix::scale(exMatrix, exMatrix, s, s, 1);
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matrix::scale(exMatrix, exMatrix, fontScale, fontScale, 1.0f);
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// calculate how much longer the real world distance is at the top of the screen
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// than at the middle of the screen.
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float topedgelength = std::sqrt(std::pow(state.getHeight(), 2) / 4.0f * (1.0f + std::pow(state.getAltitude(), 2)));
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float x = state.getHeight() / 2.0f * std::tan(state.getPitch());
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float extra = (topedgelength + x) / topedgelength - 1;
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useProgram(iconShader->program);
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iconShader->u_matrix = vtxMatrix;
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iconShader->u_exmatrix = exMatrix;
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iconShader->u_texsize = {{ float(spriteAtlas->getWidth()) / 4.0f, float(spriteAtlas->getHeight()) / 4.0f }};
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iconShader->u_skewed = skewed;
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iconShader->u_extra = extra;
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// adjust min/max zooms for variable font sies
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float zoomAdjust = std::log(fontSize / layout.icon.size) / std::log(2);
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iconShader->u_zoom = (state.getNormalizedZoom() - zoomAdjust) * 10; // current zoom level
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iconShader->u_fadedist = 0 * 10;
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iconShader->u_minfadezoom = state.getNormalizedZoom() * 10;
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iconShader->u_maxfadezoom = state.getNormalizedZoom() * 10;
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iconShader->u_fadezoom = state.getNormalizedZoom() * 10;
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iconShader->u_opacity = properties.icon.opacity;
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setDepthSublayer(0);
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bucket.drawIcons(*iconShader);
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}
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}
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if (bucket.hasTextData()) {
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config.depthTest = layout.text.rotation_alignment == RotationAlignmentType::Map;
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glyphAtlas->bind();
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renderSDF(bucket,
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id,
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matrix,
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layout.text,
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properties.text,
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24.0f,
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{{ float(glyphAtlas->width) / 4, float(glyphAtlas->height) / 4 }},
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*sdfGlyphShader,
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&SymbolBucket::drawGlyphs);
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}
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}
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