void Painter::renderSDF(SymbolBucket& bucket,
const RenderTile& tile,
float sdfFontSize,
std::array<float, 2> texsize,
SDFShader& sdfShader,
void (SymbolBucket::*drawSDF)(SDFShader&, gl::ObjectStore&, bool),
// Layout
AlignmentType rotationAlignment,
AlignmentType pitchAlignment,
float layoutSize,
// Paint
float opacity,
Color color,
Color haloColor,
float haloWidth,
float haloBlur,
std::array<float, 2> translate,
TranslateAnchorType translateAnchor,
float paintSize)
{
mat4 vtxMatrix = tile.translatedMatrix(translate, translateAnchor, state);
// If layerStyle.size > bucket.info.fontSize then labels may collide
float fontSize = paintSize;
float fontScale = fontSize / sdfFontSize;
bool rotateWithMap = rotationAlignment == AlignmentType::Map;
bool pitchWithMap = pitchAlignment == AlignmentType::Map;
std::array<float, 2> extrudeScale;
float gammaScale;
if (pitchWithMap) {
gammaScale = 1.0 / std::cos(state.getPitch());
extrudeScale.fill(tile.id.pixelsToTileUnits(1, state.getZoom()) * fontScale);
} else {
gammaScale = 1.0;
extrudeScale = {{
pixelsToGLUnits[0] * fontScale * state.getAltitude(),
pixelsToGLUnits[1] * fontScale * state.getAltitude()
}};
}
config.program = sdfShader.getID();
sdfShader.u_matrix = vtxMatrix;
sdfShader.u_extrude_scale = extrudeScale;
sdfShader.u_texsize = texsize;
sdfShader.u_rotate_with_map = rotateWithMap;
sdfShader.u_pitch_with_map = pitchWithMap;
sdfShader.u_texture = 0;
sdfShader.u_pitch = state.getPitch() * util::DEG2RAD;
sdfShader.u_bearing = -1.0f * state.getAngle();
sdfShader.u_aspect_ratio = (state.getWidth() * 1.0f) / (state.getHeight() * 1.0f);
// adjust min/max zooms for variable font sies
float zoomAdjust = std::log(fontSize / layoutSize) / std::log(2);
sdfShader.u_zoom = (state.getZoom() - zoomAdjust) * 10; // current zoom level
frameHistory.bind(store, config, 1);
sdfShader.u_fadetexture = 1;
// 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 / frame.pixelRatio;
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 (haloColor.a > 0.0f && haloWidth > 0.0f) {
sdfShader.u_gamma = (haloBlur * blurOffset / fontScale / sdfPx + gamma) * gammaScale;
sdfShader.u_color = haloColor;
sdfShader.u_opacity = opacity;
sdfShader.u_buffer = (haloOffset - haloWidth / fontScale) / sdfPx;
setDepthSublayer(0);
(bucket.*drawSDF)(sdfShader, store, isOverdraw());
}
// Then, we draw the text/icon over the halo
if (color.a > 0.0f) {
sdfShader.u_gamma = gamma * gammaScale;
sdfShader.u_color = color;
sdfShader.u_opacity = opacity;
sdfShader.u_buffer = (256.0f - 64.0f) / 256.0f;
setDepthSublayer(1);
(bucket.*drawSDF)(sdfShader, store, isOverdraw());
}
}
void Painter::renderSDF(SymbolBucket &bucket,
const UnwrappedTileID &tileID,
const mat4 &matrix,
float sdfFontSize,
std::array<float, 2> texsize,
SDFShader& sdfShader,
void (SymbolBucket::*drawSDF)(SDFShader&, gl::ObjectStore&),
// Layout
RotationAlignmentType rotationAlignment,
float layoutSize,
// Paint
float opacity,
Color color,
Color haloColor,
float haloWidth,
float haloBlur,
std::array<float, 2> translate,
TranslateAnchorType translateAnchor,
float paintSize)
{
mat4 vtxMatrix = translatedMatrix(matrix, translate, tileID, translateAnchor);
// If layerStyle.size > bucket.info.fontSize then labels may collide
float fontSize = paintSize;
float fontScale = fontSize / sdfFontSize;
float scale = fontScale;
std::array<float, 2> exScale = extrudeScale;
bool alignedWithMap = rotationAlignment == RotationAlignmentType::Map;
float gammaScale = 1.0f;
if (alignedWithMap) {
scale *= tileID.pixelsToTileUnits(1, state.getZoom());
exScale.fill(scale);
gammaScale /= std::cos(state.getPitch());
} else {
exScale = {{ exScale[0] * scale, exScale[1] * scale }};
}
config.program = sdfShader.getID();
sdfShader.u_matrix = vtxMatrix;
sdfShader.u_extrude_scale = exScale;
sdfShader.u_texsize = texsize;
sdfShader.u_skewed = alignedWithMap;
sdfShader.u_texture = 0;
// adjust min/max zooms for variable font sies
float zoomAdjust = std::log(fontSize / layoutSize) / std::log(2);
sdfShader.u_zoom = (state.getZoom() - zoomAdjust) * 10; // current zoom level
config.activeTexture = GL_TEXTURE1;
frameHistory.bind(store);
sdfShader.u_fadetexture = 1;
// 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 / frame.pixelRatio;
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 (haloColor[3] > 0.0f && haloWidth > 0.0f) {
sdfShader.u_gamma = (haloBlur * blurOffset / fontScale / sdfPx + gamma) * gammaScale;
sdfShader.u_color = haloColor;
sdfShader.u_opacity = opacity;
sdfShader.u_buffer = (haloOffset - haloWidth / fontScale) / sdfPx;
setDepthSublayer(0);
(bucket.*drawSDF)(sdfShader, store);
}
// Then, we draw the text/icon over the halo
if (color[3] > 0.0f) {
sdfShader.u_gamma = gamma * gammaScale;
sdfShader.u_color = color;
sdfShader.u_opacity = opacity;
sdfShader.u_buffer = (256.0f - 64.0f) / 256.0f;
setDepthSublayer(1);
(bucket.*drawSDF)(sdfShader, store);
}
}