diff options
Diffstat (limited to 'src/mbgl/renderer/painter_symbol.cpp')
| -rw-r--r-- | src/mbgl/renderer/painter_symbol.cpp | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/src/mbgl/renderer/painter_symbol.cpp b/src/mbgl/renderer/painter_symbol.cpp new file mode 100644 index 0000000000..79625f1681 --- /dev/null +++ b/src/mbgl/renderer/painter_symbol.cpp @@ -0,0 +1,208 @@ +#include <mbgl/renderer/painter.hpp> +#include <mbgl/renderer/symbol_bucket.hpp> +#include <mbgl/style/style_layer.hpp> +#include <mbgl/geometry/glyph_atlas.hpp> +#include <mbgl/geometry/sprite_atlas.hpp> +#include <mbgl/map/map.hpp> +#include <mbgl/util/math.hpp> +#include <cmath> + +using namespace mbgl; + +template <typename BucketProperties, typename StyleProperties> +void Painter::renderSDF(SymbolBucket &bucket, + const Tile::ID &id, + const mat4 &matrix, + const BucketProperties& bucketProperties, + const StyleProperties& styleProperties, + float sdfFontSize, + std::array<float, 2> texsize, + SDFShader& sdfShader, + void (SymbolBucket::*drawSDF)(SDFShader&)) +{ + mat4 vtxMatrix = translatedMatrix(matrix, styleProperties.translate, id, styleProperties.translate_anchor); + + mat4 exMatrix; + matrix::copy(exMatrix, projMatrix); + + bool aligned_with_map = (bucketProperties.rotation_alignment == RotationAlignmentType::Map); + const float angleOffset = aligned_with_map ? state.getAngle() : 0; + + if (angleOffset) { + matrix::rotate_z(exMatrix, exMatrix, angleOffset); + } + + // If layerStyle.size > bucket.info.fontSize then labels may collide + float fontSize = std::fmin(styleProperties.size, bucketProperties.max_size); + float fontScale = fontSize / sdfFontSize; + matrix::scale(exMatrix, exMatrix, fontScale, fontScale, 1.0f); + + useProgram(sdfShader.program); + sdfShader.u_matrix = vtxMatrix; + sdfShader.u_exmatrix = exMatrix; + sdfShader.u_texsize = texsize; + + // Convert the -pi..pi to an int8 range. + float angle = std::round(state.getAngle() / M_PI * 128); + + // adjust min/max zooms for variable font sies + float zoomAdjust = std::log(fontSize / bucketProperties.max_size) / std::log(2); + + sdfShader.u_flip = (aligned_with_map && bucketProperties.keep_upright) ? 1 : 0; + sdfShader.u_angle = (int32_t)(angle + 256) % 256; + sdfShader.u_zoom = (state.getNormalizedZoom() - zoomAdjust) * 10; // current zoom level + + FadeProperties f = frameHistory.getFadeProperties(300_milliseconds); + sdfShader.u_fadedist = f.fadedist * 10; + sdfShader.u_minfadezoom = std::floor(f.minfadezoom * 10); + sdfShader.u_maxfadezoom = std::floor(f.maxfadezoom * 10); + sdfShader.u_fadezoom = (state.getNormalizedZoom() + f.bump) * 10; + + // The default gamma value has to be adjust for the current pixelratio so that we're not + // drawing blurry font on retina screens. + const float gamma = 0.105 * sdfFontSize / fontSize / state.getPixelRatio(); + + const float sdfPx = 8.0f; + const float blurOffset = 1.19f; + const float haloOffset = 6.0f; + + // We're drawing in the translucent pass which is bottom-to-top, so we need + // to draw the halo first. + if (styleProperties.halo_color[3] > 0.0f) { + sdfShader.u_gamma = styleProperties.halo_blur * blurOffset / fontScale / sdfPx + gamma; + + if (styleProperties.opacity < 1.0f) { + Color color = styleProperties.halo_color; + color[0] *= styleProperties.opacity; + color[1] *= styleProperties.opacity; + color[2] *= styleProperties.opacity; + color[3] *= styleProperties.opacity; + sdfShader.u_color = color; + } else { + sdfShader.u_color = styleProperties.halo_color; + } + + sdfShader.u_buffer = (haloOffset - styleProperties.halo_width / fontScale) / sdfPx; + + depthRange(strata, 1.0f); + (bucket.*drawSDF)(sdfShader); + } + + // Then, we draw the text/icon over the halo + if (styleProperties.color[3] > 0.0f) { + sdfShader.u_gamma = gamma; + + if (styleProperties.opacity < 1.0f) { + Color color = styleProperties.color; + color[0] *= styleProperties.opacity; + color[1] *= styleProperties.opacity; + color[2] *= styleProperties.opacity; + color[3] *= styleProperties.opacity; + sdfShader.u_color = color; + } else { + sdfShader.u_color = styleProperties.color; + } + + sdfShader.u_buffer = (256.0f - 64.0f) / 256.0f; + + depthRange(strata + strata_epsilon, 1.0f); + (bucket.*drawSDF)(sdfShader); + } +} + +void Painter::renderSymbol(SymbolBucket &bucket, util::ptr<StyleLayer> layer_desc, const Tile::ID &id, const mat4 &matrix) { + // Abort early. + if (pass == RenderPass::Opaque) { + return; + } + + const SymbolProperties &properties = layer_desc->getProperties<SymbolProperties>(); + + glDisable(GL_STENCIL_TEST); + + if (bucket.hasIconData()) { + bool sdf = bucket.sdfIcons; + + const float angleOffset = + bucket.properties.icon.rotation_alignment == RotationAlignmentType::Map + ? state.getAngle() + : 0; + + // If layerStyle.size > bucket.info.fontSize then labels may collide + const float fontSize = properties.icon.size != 0 ? properties.icon.size : bucket.properties.icon.max_size; + const float fontScale = fontSize / 1.0f; + + spriteAtlas.bind(state.isChanging() || bucket.properties.placement == PlacementType::Line || angleOffset != 0 || fontScale != 1 || sdf); + + std::array<float, 2> texsize = {{ + float(spriteAtlas.getWidth()), + float(spriteAtlas.getHeight()) + }}; + + if (sdf) { + renderSDF(bucket, + id, + matrix, + bucket.properties.icon, + properties.icon, + 1.0f, + texsize, + *sdfIconShader, + &SymbolBucket::drawIcons); + } else { + mat4 vtxMatrix = translatedMatrix(matrix, properties.icon.translate, id, properties.icon.translate_anchor); + + mat4 exMatrix; + matrix::copy(exMatrix, projMatrix); + + if (angleOffset) { + matrix::rotate_z(exMatrix, exMatrix, angleOffset); + } + + matrix::scale(exMatrix, exMatrix, fontScale, fontScale, 1.0f); + + useProgram(iconShader->program); + iconShader->u_matrix = vtxMatrix; + iconShader->u_exmatrix = exMatrix; + iconShader->u_texsize = texsize; + + // Convert the -pi..pi to an int8 range. + const float angle = std::round(state.getAngle() / M_PI * 128); + + // adjust min/max zooms for variable font sies + float zoomAdjust = std::log(fontSize / bucket.properties.icon.max_size) / std::log(2); + + iconShader->u_angle = (int32_t)(angle + 256) % 256; + + bool flip = (bucket.properties.icon.rotation_alignment == RotationAlignmentType::Map) + && bucket.properties.icon.keep_upright; + iconShader->u_flip = flip ? 1 : 0; + iconShader->u_zoom = (state.getNormalizedZoom() - zoomAdjust) * 10; // current zoom level + + iconShader->u_fadedist = 0 * 10; + iconShader->u_minfadezoom = state.getNormalizedZoom() * 10; + iconShader->u_maxfadezoom = state.getNormalizedZoom() * 10; + iconShader->u_fadezoom = state.getNormalizedZoom() * 10; + iconShader->u_opacity = properties.icon.opacity; + + depthRange(strata, 1.0f); + bucket.drawIcons(*iconShader); + } + } + + if (bucket.hasTextData()) { + glyphAtlas.bind(); + + renderSDF(bucket, + id, + matrix, + bucket.properties.text, + properties.text, + 24.0f, + {{ float(glyphAtlas.width) / 4, float(glyphAtlas.height) / 4 }}, + *sdfGlyphShader, + &SymbolBucket::drawGlyphs); + } + + glEnable(GL_STENCIL_TEST); +} |