832 lines
27 KiB
C++
832 lines
27 KiB
C++
#pragma once
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#include <mbgl/shaders/shader_source.hpp>
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#include <mbgl/shaders/vulkan/shader_program.hpp>
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namespace mbgl {
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namespace shaders {
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constexpr auto symbolShaderPrelude = R"(
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#define idSymbolDrawableUBO idDrawableReservedVertexOnlyUBO
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#define idSymbolTilePropsUBO idDrawableReservedFragmentOnlyUBO
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#define idSymbolEvaluatedPropsUBO layerUBOStartId
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)";
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template <>
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struct ShaderSource<BuiltIn::SymbolIconShader, gfx::Backend::Type::Vulkan> {
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static constexpr const char* name = "SymbolIconShader";
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static const std::array<AttributeInfo, 6> attributes;
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static constexpr std::array<AttributeInfo, 0> instanceAttributes{};
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static const std::array<TextureInfo, 1> textures;
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static constexpr auto prelude = symbolShaderPrelude;
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static constexpr auto vertex = R"(
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layout(location = 0) in ivec4 in_pos_offset;
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layout(location = 1) in uvec4 in_data;
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layout(location = 2) in ivec4 in_pixeloffset;
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layout(location = 3) in vec3 in_projected_pos;
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layout(location = 4) in float in_fade_opacity;
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#if !defined(HAS_UNIFORM_u_opacity)
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layout(location = 5) in vec2 in_opacity;
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#endif
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layout(push_constant) uniform Constants {
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int ubo_index;
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} constant;
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struct SymbolDrawableUBO {
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mat4 matrix;
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mat4 label_plane_matrix;
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mat4 coord_matrix;
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vec2 texsize;
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vec2 texsize_icon;
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bool is_text_prop;
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bool rotate_symbol;
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bool pitch_with_map;
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bool is_size_zoom_constant;
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bool is_size_feature_constant;
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float size_t;
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float size;
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// Interpolations
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float fill_color_t;
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float halo_color_t;
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float opacity_t;
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float halo_width_t;
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float halo_blur_t;
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};
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layout(std140, set = LAYER_SET_INDEX, binding = idSymbolDrawableUBO) readonly buffer SymbolDrawableUBOVector {
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SymbolDrawableUBO drawable_ubo[];
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} drawableVector;
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layout(location = 0) out mediump vec2 frag_tex;
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layout(location = 1) out mediump float frag_opacity;
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void main() {
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const SymbolDrawableUBO drawable = drawableVector.drawable_ubo[constant.ubo_index];
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const vec2 a_pos = in_pos_offset.xy;
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const vec2 a_offset = in_pos_offset.zw;
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const vec2 a_tex = in_data.xy;
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const vec2 a_size = in_data.zw;
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const float a_size_min = floor(a_size[0] * 0.5);
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const vec2 a_pxoffset = in_pixeloffset.xy;
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const vec2 a_minFontScale = in_pixeloffset.zw / 256.0;
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const float segment_angle = -in_projected_pos[2];
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float size;
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if (!drawable.is_size_zoom_constant && !drawable.is_size_feature_constant) {
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size = mix(a_size_min, a_size[1], drawable.size_t) / 128.0;
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} else if (drawable.is_size_zoom_constant && !drawable.is_size_feature_constant) {
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size = a_size_min / 128.0;
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} else {
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size = drawable.size;
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}
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const vec4 projectedPoint = drawable.matrix * vec4(a_pos, 0, 1);
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const float camera_to_anchor_distance = projectedPoint.w;
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// See comments in symbol_sdf.vertex
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const float distance_ratio = drawable.pitch_with_map ?
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camera_to_anchor_distance / paintParams.camera_to_center_distance :
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paintParams.camera_to_center_distance / camera_to_anchor_distance;
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const float perspective_ratio = clamp(
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0.5 + 0.5 * distance_ratio,
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0.0, // Prevents oversized near-field symbols in pitched/overzoomed tiles
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4.0);
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size *= perspective_ratio;
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const float fontScale = drawable.is_text_prop ? size / 24.0 : size;
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float symbol_rotation = 0.0;
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if (drawable.rotate_symbol) {
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// See comments in symbol_sdf.vertex
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const vec4 offsetProjectedPoint = drawable.matrix * vec4(a_pos + vec2(1, 0), 0, 1);
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const vec2 a = projectedPoint.xy / projectedPoint.w;
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const vec2 b = offsetProjectedPoint.xy / offsetProjectedPoint.w;
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symbol_rotation = atan((b.y - a.y) / paintParams.aspect_ratio, b.x - a.x);
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}
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const float angle_sin = sin(segment_angle + symbol_rotation);
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const float angle_cos = cos(segment_angle + symbol_rotation);
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const mat2 rotation_matrix = mat2(angle_cos, -1.0 * angle_sin, angle_sin, angle_cos);
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const vec4 projected_pos = drawable.label_plane_matrix * vec4(in_projected_pos.xy, 0.0, 1.0);
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const vec2 pos0 = projected_pos.xy / projected_pos.w;
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const vec2 posOffset = a_offset * max(a_minFontScale, fontScale) / 32.0 + a_pxoffset / 16.0;
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gl_Position = drawable.coord_matrix * vec4(pos0 + rotation_matrix * posOffset, 0.0, 1.0);
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applySurfaceTransform();
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const vec2 raw_fade_opacity = unpack_opacity(in_fade_opacity);
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const float fade_change = raw_fade_opacity[1] > 0.5 ? paintParams.symbol_fade_change : -paintParams.symbol_fade_change;
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const float fade_opacity = max(0.0, min(1.0, raw_fade_opacity[0] + fade_change));
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frag_tex = a_tex / drawable.texsize;
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#if defined(HAS_UNIFORM_u_opacity)
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frag_opacity = fade_opacity;
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#else
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frag_opacity = unpack_mix_float(in_opacity, drawable.opacity_t) * fade_opacity;
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#endif
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}
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)";
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static constexpr auto fragment = R"(
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layout(location = 0) in mediump vec2 frag_tex;
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layout(location = 1) in mediump float frag_opacity;
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layout(location = 0) out vec4 out_color;
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layout(push_constant) uniform Constants {
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int ubo_index;
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} constant;
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struct SymbolTilePropsUBO {
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bool is_text;
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bool is_halo;
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float gamma_scale;
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float pad1;
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};
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layout(std140, set = LAYER_SET_INDEX, binding = idSymbolTilePropsUBO) readonly buffer SymbolTilePropsUBOVector {
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SymbolTilePropsUBO tile_props_ubo[];
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} tilePropsVector;
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layout(set = LAYER_SET_INDEX, binding = idSymbolEvaluatedPropsUBO) uniform SymbolEvaluatedPropsUBO {
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vec4 text_fill_color;
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vec4 text_halo_color;
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float text_opacity;
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float text_halo_width;
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float text_halo_blur;
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float pad1;
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vec4 icon_fill_color;
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vec4 icon_halo_color;
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float icon_opacity;
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float icon_halo_width;
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float icon_halo_blur;
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float pad2;
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} props;
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layout(set = DRAWABLE_IMAGE_SET_INDEX, binding = 0) uniform sampler2D image0_sampler;
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void main() {
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#if defined(OVERDRAW_INSPECTOR)
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out_color = vec4(1.0);
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return;
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#endif
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const SymbolTilePropsUBO tileProps = tilePropsVector.tile_props_ubo[constant.ubo_index];
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#if defined(HAS_UNIFORM_u_opacity)
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const float opacity = (tileProps.is_text ? props.text_opacity : props.icon_opacity) * frag_opacity;
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#else
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const float opacity = frag_opacity; // fade_opacity is baked in for this case
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#endif
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out_color = texture(image0_sampler, frag_tex) * opacity;
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}
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)";
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};
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template <>
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struct ShaderSource<BuiltIn::SymbolSDFShader, gfx::Backend::Type::Vulkan> {
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static constexpr const char* name = "SymbolSDFShader";
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static const std::array<AttributeInfo, 10> attributes;
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static constexpr std::array<AttributeInfo, 0> instanceAttributes{};
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static const std::array<TextureInfo, 1> textures;
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static constexpr auto prelude = symbolShaderPrelude;
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static constexpr auto vertex = R"(
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layout(location = 0) in ivec4 in_pos_offset;
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layout(location = 1) in uvec4 in_data;
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layout(location = 2) in ivec4 in_pixeloffset;
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layout(location = 3) in vec3 in_projected_pos;
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layout(location = 4) in float in_fade_opacity;
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#if !defined(HAS_UNIFORM_u_fill_color)
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layout(location = 5) in vec4 in_fill_color;
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#endif
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#if !defined(HAS_UNIFORM_u_halo_color)
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layout(location = 6) in vec4 in_halo_color;
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#endif
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#if !defined(HAS_UNIFORM_u_opacity)
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layout(location = 7) in vec2 in_opacity;
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#endif
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#if !defined(HAS_UNIFORM_u_halo_width)
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layout(location = 8) in vec2 in_halo_width;
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#endif
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#if !defined(HAS_UNIFORM_u_halo_blur)
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layout(location = 9) in vec2 in_halo_blur;
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#endif
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layout(push_constant) uniform Constants {
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int ubo_index;
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} constant;
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struct SymbolDrawableUBO {
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mat4 matrix;
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mat4 label_plane_matrix;
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mat4 coord_matrix;
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vec2 texsize;
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vec2 texsize_icon;
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bool is_text_prop;
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bool rotate_symbol;
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bool pitch_with_map;
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bool is_size_zoom_constant;
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bool is_size_feature_constant;
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float size_t;
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float size;
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// Interpolations
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float fill_color_t;
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float halo_color_t;
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float opacity_t;
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float halo_width_t;
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float halo_blur_t;
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};
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layout(std140, set = LAYER_SET_INDEX, binding = idSymbolDrawableUBO) readonly buffer SymbolDrawableUBOVector {
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SymbolDrawableUBO drawable_ubo[];
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} drawableVector;
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layout(location = 0) out mediump vec2 frag_tex;
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layout(location = 1) out mediump float frag_fade_opacity;
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layout(location = 2) out mediump float frag_font_scale;
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layout(location = 3) out mediump float frag_gamma_scale;
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#if !defined(HAS_UNIFORM_u_fill_color)
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layout(location = 4) out mediump vec4 frag_fill_color;
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#endif
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#if !defined(HAS_UNIFORM_u_halo_color)
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layout(location = 5) out mediump vec4 frag_halo_color;
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#endif
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#if !defined(HAS_UNIFORM_u_opacity)
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layout(location = 6) out mediump float frag_opacity;
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#endif
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#if !defined(HAS_UNIFORM_u_halo_width)
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layout(location = 7) out mediump float frag_halo_width;
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#endif
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#if !defined(HAS_UNIFORM_u_halo_blur)
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layout(location = 8) out mediump float frag_halo_blur;
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#endif
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void main() {
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const SymbolDrawableUBO drawable = drawableVector.drawable_ubo[constant.ubo_index];
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const vec2 a_pos = in_pos_offset.xy;
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const vec2 a_offset = in_pos_offset.zw;
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const vec2 a_tex = in_data.xy;
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const vec2 a_size = in_data.zw;
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const float a_size_min = floor(a_size[0] * 0.5);
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const vec2 a_pxoffset = in_pixeloffset.xy;
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const float segment_angle = -in_projected_pos[2];
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float size;
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if (!drawable.is_size_zoom_constant && !drawable.is_size_feature_constant) {
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size = mix(a_size_min, a_size[1], drawable.size_t) / 128.0;
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} else if (drawable.is_size_zoom_constant && !drawable.is_size_feature_constant) {
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size = a_size_min / 128.0;
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} else {
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size = drawable.size;
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}
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const vec4 projectedPoint = drawable.matrix * vec4(a_pos, 0, 1);
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const float camera_to_anchor_distance = projectedPoint.w;
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// If the label is pitched with the map, layout is done in pitched space,
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// which makes labels in the distance smaller relative to viewport space.
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// We counteract part of that effect by multiplying by the perspective ratio.
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// If the label isn't pitched with the map, we do layout in viewport space,
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// which makes labels in the distance larger relative to the features around
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// them. We counteract part of that effect by dividing by the perspective ratio.
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const float distance_ratio = drawable.pitch_with_map ?
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camera_to_anchor_distance / paintParams.camera_to_center_distance :
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paintParams.camera_to_center_distance / camera_to_anchor_distance;
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const float perspective_ratio = clamp(
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0.5 + 0.5 * distance_ratio,
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0.0, // Prevents oversized near-field symbols in pitched/overzoomed tiles
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4.0);
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size *= perspective_ratio;
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const float fontScale = drawable.is_text_prop ? size / 24.0 : size;
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float symbol_rotation = 0.0;
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if (drawable.rotate_symbol) {
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// Point labels with 'rotation-alignment: map' are horizontal with respect to tile units
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// To figure out that angle in projected space, we draw a short horizontal line in tile
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// space, project it, and measure its angle in projected space.
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const vec4 offsetProjectedPoint = drawable.matrix * vec4(a_pos + vec2(1, 0), 0, 1);
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const vec2 a = projectedPoint.xy / projectedPoint.w;
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const vec2 b = offsetProjectedPoint.xy / offsetProjectedPoint.w;
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symbol_rotation = atan((b.y - a.y) / paintParams.aspect_ratio, b.x - a.x);
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}
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const float angle_sin = sin(segment_angle + symbol_rotation);
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const float angle_cos = cos(segment_angle + symbol_rotation);
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const mat2 rotation_matrix = mat2(angle_cos, -1.0 * angle_sin, angle_sin, angle_cos);
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const vec4 projected_pos = drawable.label_plane_matrix * vec4(in_projected_pos.xy, 0.0, 1.0);
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const vec2 pos_rot = a_offset / 32.0 * fontScale + a_pxoffset;
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const vec2 pos0 = projected_pos.xy / projected_pos.w + rotation_matrix * pos_rot;
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gl_Position = drawable.coord_matrix * vec4(pos0, 0.0, 1.0);
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applySurfaceTransform();
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const vec2 raw_fade_opacity = unpack_opacity(in_fade_opacity);
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const float fade_change = raw_fade_opacity[1] > 0.5 ? paintParams.symbol_fade_change : -paintParams.symbol_fade_change;
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frag_tex = a_tex / drawable.texsize;
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frag_fade_opacity = max(0.0, min(1.0, raw_fade_opacity[0] + fade_change));
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frag_font_scale = fontScale;
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frag_gamma_scale = gl_Position.w;
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#if !defined(HAS_UNIFORM_u_fill_color)
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frag_fill_color = unpack_mix_color(in_fill_color, drawable.fill_color_t);
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#endif
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#if !defined(HAS_UNIFORM_u_halo_color)
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frag_halo_color = unpack_mix_color(in_halo_color, drawable.halo_color_t);
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#endif
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#if !defined(HAS_UNIFORM_u_halo_width)
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frag_halo_width = unpack_mix_float(in_halo_width, drawable.halo_width_t);
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#endif
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#if !defined(HAS_UNIFORM_u_halo_blur)
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frag_halo_blur = unpack_mix_float(in_halo_blur, drawable.halo_blur_t);
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#endif
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#if !defined(HAS_UNIFORM_u_opacity)
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frag_opacity = unpack_mix_float(in_opacity, drawable.opacity_t);
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#endif
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}
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)";
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static constexpr auto fragment = R"(
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layout(location = 0) in mediump vec2 frag_tex;
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layout(location = 1) in mediump float frag_fade_opacity;
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layout(location = 2) in mediump float frag_font_scale;
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layout(location = 3) in mediump float frag_gamma_scale;
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#if !defined(HAS_UNIFORM_u_fill_color)
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layout(location = 4) in mediump vec4 frag_fill_color;
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#endif
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#if !defined(HAS_UNIFORM_u_halo_color)
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layout(location = 5) in mediump vec4 frag_halo_color;
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#endif
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#if !defined(HAS_UNIFORM_u_opacity)
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layout(location = 6) in mediump float frag_opacity;
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#endif
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#if !defined(HAS_UNIFORM_u_halo_width)
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layout(location = 7) in mediump float frag_halo_width;
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#endif
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#if !defined(HAS_UNIFORM_u_halo_blur)
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layout(location = 8) in mediump float frag_halo_blur;
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#endif
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layout(location = 0) out vec4 out_color;
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layout(push_constant) uniform Constants {
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int ubo_index;
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} constant;
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struct SymbolTilePropsUBO {
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bool is_text;
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bool is_halo;
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float gamma_scale;
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float pad1;
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};
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layout(std140, set = LAYER_SET_INDEX, binding = idSymbolTilePropsUBO) readonly buffer SymbolTilePropsUBOVector {
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SymbolTilePropsUBO tile_props_ubo[];
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} tilePropsVector;
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layout(set = LAYER_SET_INDEX, binding = idSymbolEvaluatedPropsUBO) uniform SymbolEvaluatedPropsUBO {
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vec4 text_fill_color;
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vec4 text_halo_color;
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float text_opacity;
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float text_halo_width;
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float text_halo_blur;
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float pad1;
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vec4 icon_fill_color;
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vec4 icon_halo_color;
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float icon_opacity;
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float icon_halo_width;
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float icon_halo_blur;
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float pad2;
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} props;
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layout(set = DRAWABLE_IMAGE_SET_INDEX, binding = 0) uniform sampler2D image0_sampler;
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void main() {
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#if defined(OVERDRAW_INSPECTOR)
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out_color = vec4(1.0);
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return;
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#endif
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const SymbolTilePropsUBO tileProps = tilePropsVector.tile_props_ubo[constant.ubo_index];
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#if defined(HAS_UNIFORM_u_fill_color)
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const vec4 fill_color = tileProps.is_text ? props.text_fill_color : props.icon_fill_color;
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#else
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const vec4 fill_color = frag_fill_color;
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#endif
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#if defined(HAS_UNIFORM_u_halo_color)
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const vec4 halo_color = tileProps.is_text ? props.text_halo_color : props.icon_halo_color;
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#else
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const vec4 halo_color = frag_halo_color;
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#endif
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#if defined(HAS_UNIFORM_u_opacity)
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const float opacity = tileProps.is_text ? props.text_opacity : props.icon_opacity;
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#else
|
|
const float opacity = frag_opacity;
|
|
#endif
|
|
#if defined(HAS_UNIFORM_u_halo_width)
|
|
const float halo_width = tileProps.is_text ? props.text_halo_width : props.icon_halo_width;
|
|
#else
|
|
const float halo_width = frag_halo_width;
|
|
#endif
|
|
#if defined(HAS_UNIFORM_u_halo_blur)
|
|
const float halo_blur = tileProps.is_text ? props.text_halo_blur : props.icon_halo_blur;
|
|
#else
|
|
const float halo_blur = frag_halo_blur;
|
|
#endif
|
|
|
|
const float EDGE_GAMMA = 0.105 / DEVICE_PIXEL_RATIO;
|
|
const float fontGamma = frag_font_scale * tileProps.gamma_scale;
|
|
const float fillGamma = EDGE_GAMMA / fontGamma;
|
|
const float haloGamma = (halo_blur * 1.19 / SDF_PX + EDGE_GAMMA) / fontGamma;
|
|
const float gamma = tileProps.is_halo ? haloGamma : fillGamma;
|
|
const float gammaScaled = gamma * frag_gamma_scale;
|
|
const vec4 color = tileProps.is_halo ? halo_color : fill_color;
|
|
const float fillInnerEdge = (256.0 - 64.0) / 256.0;
|
|
const float haloInnerEdge = fillInnerEdge + haloGamma * frag_gamma_scale;
|
|
const float innerEdge = tileProps.is_halo ? haloInnerEdge : fillInnerEdge;
|
|
const float dist = texture(image0_sampler, frag_tex).a;
|
|
float alpha = smoothstep(innerEdge - gammaScaled, innerEdge + gammaScaled, dist);
|
|
if (tileProps.is_halo) {
|
|
// When drawing halos, if the fill is translucent we want
|
|
// the inside of the halo to be translucent as well
|
|
const float haloEdge = (6.0 - halo_width / frag_font_scale) / SDF_PX;
|
|
alpha = min(smoothstep(haloEdge - gammaScaled, haloEdge + gammaScaled, dist), 1.0 - alpha);
|
|
}
|
|
|
|
out_color = color * (alpha * opacity * frag_fade_opacity);
|
|
}
|
|
)";
|
|
};
|
|
|
|
template <>
|
|
struct ShaderSource<BuiltIn::SymbolTextAndIconShader, gfx::Backend::Type::Vulkan> {
|
|
static constexpr const char* name = "SymbolTextAndIconShader";
|
|
|
|
static const std::array<AttributeInfo, 9> attributes;
|
|
static constexpr std::array<AttributeInfo, 0> instanceAttributes{};
|
|
static const std::array<TextureInfo, 2> textures;
|
|
|
|
static constexpr auto prelude = symbolShaderPrelude;
|
|
static constexpr auto vertex = R"(
|
|
|
|
#define SDF 1.0
|
|
#define ICON 0.0
|
|
|
|
layout(location = 0) in ivec4 in_pos_offset;
|
|
layout(location = 1) in uvec4 in_data;
|
|
layout(location = 2) in vec3 in_projected_pos;
|
|
layout(location = 3) in float in_fade_opacity;
|
|
|
|
#if !defined(HAS_UNIFORM_u_fill_color)
|
|
layout(location = 4) in vec4 in_fill_color;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_halo_color)
|
|
layout(location = 5) in vec4 in_halo_color;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_opacity)
|
|
layout(location = 6) in vec2 in_opacity;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_halo_width)
|
|
layout(location = 7) in vec2 in_halo_width;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_halo_blur)
|
|
layout(location = 8) in vec2 in_halo_blur;
|
|
#endif
|
|
|
|
layout(push_constant) uniform Constants {
|
|
int ubo_index;
|
|
} constant;
|
|
|
|
struct SymbolDrawableUBO {
|
|
mat4 matrix;
|
|
mat4 label_plane_matrix;
|
|
mat4 coord_matrix;
|
|
|
|
vec2 texsize;
|
|
vec2 texsize_icon;
|
|
|
|
bool is_text_prop;
|
|
bool rotate_symbol;
|
|
bool pitch_with_map;
|
|
bool is_size_zoom_constant;
|
|
bool is_size_feature_constant;
|
|
|
|
float size_t;
|
|
float size;
|
|
|
|
// Interpolations
|
|
float fill_color_t;
|
|
float halo_color_t;
|
|
float opacity_t;
|
|
float halo_width_t;
|
|
float halo_blur_t;
|
|
};
|
|
|
|
layout(std140, set = LAYER_SET_INDEX, binding = idSymbolDrawableUBO) readonly buffer SymbolDrawableUBOVector {
|
|
SymbolDrawableUBO drawable_ubo[];
|
|
} drawableVector;
|
|
|
|
layout(location = 0) out mediump vec2 frag_tex;
|
|
layout(location = 1) out mediump float frag_fade_opacity;
|
|
layout(location = 2) out mediump float frag_font_scale;
|
|
layout(location = 3) out mediump float frag_gamma_scale;
|
|
|
|
#if !defined(HAS_UNIFORM_u_fill_color)
|
|
layout(location = 4) out mediump vec4 frag_fill_color;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_halo_color)
|
|
layout(location = 5) out mediump vec4 frag_halo_color;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_opacity)
|
|
layout(location = 6) out mediump float frag_opacity;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_halo_width)
|
|
layout(location = 7) out mediump float frag_halo_width;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_halo_blur)
|
|
layout(location = 8) out mediump float frag_halo_blur;
|
|
#endif
|
|
|
|
layout(location = 9) out int frag_is_icon;
|
|
|
|
void main() {
|
|
const SymbolDrawableUBO drawable = drawableVector.drawable_ubo[constant.ubo_index];
|
|
|
|
const vec2 a_pos = in_pos_offset.xy;
|
|
const vec2 a_offset = in_pos_offset.zw;
|
|
|
|
const vec2 a_tex = in_data.xy;
|
|
const vec2 a_size = in_data.zw;
|
|
|
|
const float a_size_min = floor(a_size[0] * 0.5);
|
|
const float is_sdf = a_size[0] - 2.0 * a_size_min;
|
|
const float segment_angle = -in_projected_pos[2];
|
|
|
|
float size;
|
|
if (!drawable.is_size_zoom_constant && !drawable.is_size_feature_constant) {
|
|
size = mix(a_size_min, a_size[1], drawable.size_t) / 128.0;
|
|
} else if (drawable.is_size_zoom_constant && !drawable.is_size_feature_constant) {
|
|
size = a_size_min / 128.0;
|
|
} else {
|
|
size = drawable.size;
|
|
}
|
|
|
|
const vec4 projectedPoint = drawable.matrix * vec4(a_pos, 0, 1);
|
|
const float camera_to_anchor_distance = projectedPoint.w;
|
|
// If the label is pitched with the map, layout is done in pitched space,
|
|
// which makes labels in the distance smaller relative to viewport space.
|
|
// We counteract part of that effect by multiplying by the perspective ratio.
|
|
// If the label isn't pitched with the map, we do layout in viewport space,
|
|
// which makes labels in the distance larger relative to the features around
|
|
// them. We counteract part of that effect by dividing by the perspective ratio.
|
|
const float distance_ratio = drawable.pitch_with_map ?
|
|
camera_to_anchor_distance / paintParams.camera_to_center_distance :
|
|
paintParams.camera_to_center_distance / camera_to_anchor_distance;
|
|
const float perspective_ratio = clamp(
|
|
0.5 + 0.5 * distance_ratio,
|
|
0.0, // Prevents oversized near-field symbols in pitched/overzoomed tiles
|
|
4.0);
|
|
|
|
size *= perspective_ratio;
|
|
|
|
const float fontScale = size / 24.0;
|
|
|
|
float symbol_rotation = 0.0;
|
|
if (drawable.rotate_symbol) {
|
|
// Point labels with 'rotation-alignment: map' are horizontal with respect to tile units
|
|
// To figure out that angle in projected space, we draw a short horizontal line in tile
|
|
// space, project it, and measure its angle in projected space.
|
|
const vec4 offsetProjectedPoint = drawable.matrix * vec4(a_pos + vec2(1, 0), 0, 1);
|
|
|
|
const vec2 a = projectedPoint.xy / projectedPoint.w;
|
|
const vec2 b = offsetProjectedPoint.xy / offsetProjectedPoint.w;
|
|
symbol_rotation = atan((b.y - a.y) / paintParams.aspect_ratio, b.x - a.x);
|
|
}
|
|
|
|
const float angle_sin = sin(segment_angle + symbol_rotation);
|
|
const float angle_cos = cos(segment_angle + symbol_rotation);
|
|
const mat2 rotation_matrix = mat2(angle_cos, -1.0 * angle_sin, angle_sin, angle_cos);
|
|
|
|
const vec4 projected_pos = drawable.label_plane_matrix * vec4(in_projected_pos.xy, 0.0, 1.0);
|
|
const vec2 pos_rot = a_offset / 32.0 * fontScale;
|
|
const vec2 pos0 = projected_pos.xy / projected_pos.w + rotation_matrix * pos_rot;
|
|
gl_Position = drawable.coord_matrix * vec4(pos0, 0.0, 1.0);
|
|
applySurfaceTransform();
|
|
|
|
const vec2 raw_fade_opacity = unpack_opacity(in_fade_opacity);
|
|
const float fade_change = raw_fade_opacity[1] > 0.5 ? paintParams.symbol_fade_change : -paintParams.symbol_fade_change;
|
|
|
|
const bool is_icon = (is_sdf == ICON);
|
|
frag_is_icon = int(is_icon);
|
|
|
|
frag_tex = a_tex / (is_icon ? drawable.texsize_icon : drawable.texsize);
|
|
frag_fade_opacity = max(0.0, min(1.0, raw_fade_opacity[0] + fade_change));
|
|
frag_font_scale = fontScale;
|
|
frag_gamma_scale = gl_Position.w;
|
|
|
|
#if !defined(HAS_UNIFORM_u_fill_color)
|
|
frag_fill_color = unpack_mix_color(in_fill_color, drawable.fill_color_t);
|
|
#endif
|
|
#if !defined(HAS_UNIFORM_u_halo_color)
|
|
frag_halo_color = unpack_mix_color(in_halo_color, drawable.halo_color_t);
|
|
#endif
|
|
#if !defined(HAS_UNIFORM_u_halo_width)
|
|
frag_halo_width = unpack_mix_float(in_halo_width, drawable.halo_width_t);
|
|
#endif
|
|
#if !defined(HAS_UNIFORM_u_halo_blur)
|
|
frag_halo_blur = unpack_mix_float(in_halo_blur, drawable.halo_blur_t);
|
|
#endif
|
|
#if !defined(HAS_UNIFORM_u_opacity)
|
|
frag_opacity = unpack_mix_float(in_opacity, drawable.opacity_t);
|
|
#endif
|
|
}
|
|
)";
|
|
|
|
static constexpr auto fragment = R"(
|
|
|
|
layout(location = 0) in mediump vec2 frag_tex;
|
|
layout(location = 1) in mediump float frag_fade_opacity;
|
|
layout(location = 2) in mediump float frag_font_scale;
|
|
layout(location = 3) in mediump float frag_gamma_scale;
|
|
|
|
#if !defined(HAS_UNIFORM_u_fill_color)
|
|
layout(location = 4) in mediump vec4 frag_fill_color;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_halo_color)
|
|
layout(location = 5) in mediump vec4 frag_halo_color;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_opacity)
|
|
layout(location = 6) in mediump float frag_opacity;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_halo_width)
|
|
layout(location = 7) in mediump float frag_halo_width;
|
|
#endif
|
|
|
|
#if !defined(HAS_UNIFORM_u_halo_blur)
|
|
layout(location = 8) in mediump float frag_halo_blur;
|
|
#endif
|
|
|
|
layout(location = 9) flat in int frag_is_icon;
|
|
|
|
layout(location = 0) out vec4 out_color;
|
|
|
|
layout(push_constant) uniform Constants {
|
|
int ubo_index;
|
|
} constant;
|
|
|
|
struct SymbolTilePropsUBO {
|
|
bool is_text;
|
|
bool is_halo;
|
|
float gamma_scale;
|
|
float pad1;
|
|
};
|
|
|
|
layout(std140, set = LAYER_SET_INDEX, binding = idSymbolTilePropsUBO) readonly buffer SymbolTilePropsUBOVector {
|
|
SymbolTilePropsUBO tile_props_ubo[];
|
|
} tilePropsVector;
|
|
|
|
layout(set = LAYER_SET_INDEX, binding = idSymbolEvaluatedPropsUBO) uniform SymbolEvaluatedPropsUBO {
|
|
vec4 text_fill_color;
|
|
vec4 text_halo_color;
|
|
float text_opacity;
|
|
float text_halo_width;
|
|
float text_halo_blur;
|
|
float pad1;
|
|
vec4 icon_fill_color;
|
|
vec4 icon_halo_color;
|
|
float icon_opacity;
|
|
float icon_halo_width;
|
|
float icon_halo_blur;
|
|
float pad2;
|
|
} props;
|
|
|
|
layout(set = DRAWABLE_IMAGE_SET_INDEX, binding = 0) uniform sampler2D glyph_image;
|
|
layout(set = DRAWABLE_IMAGE_SET_INDEX, binding = 1) uniform sampler2D icon_image;
|
|
|
|
void main() {
|
|
#if defined(OVERDRAW_INSPECTOR)
|
|
out_color = vec4(1.0);
|
|
return;
|
|
#endif
|
|
|
|
const SymbolTilePropsUBO tileProps = tilePropsVector.tile_props_ubo[constant.ubo_index];
|
|
|
|
#if defined(HAS_UNIFORM_u_fill_color)
|
|
const vec4 fill_color = tileProps.is_text ? props.text_fill_color : props.icon_fill_color;
|
|
#else
|
|
const vec4 fill_color = frag_fill_color;
|
|
#endif
|
|
#if defined(HAS_UNIFORM_u_halo_color)
|
|
const vec4 halo_color = tileProps.is_text ? props.text_halo_color : props.icon_halo_color;
|
|
#else
|
|
const vec4 halo_color = frag_halo_color;
|
|
#endif
|
|
#if defined(HAS_UNIFORM_u_opacity)
|
|
const float opacity = tileProps.is_text ? props.text_opacity : props.icon_opacity;
|
|
#else
|
|
const float opacity = frag_opacity;
|
|
#endif
|
|
#if defined(HAS_UNIFORM_u_halo_width)
|
|
const float halo_width = tileProps.is_text ? props.text_halo_width : props.icon_halo_width;
|
|
#else
|
|
const float halo_width = frag_halo_width;
|
|
#endif
|
|
#if defined(HAS_UNIFORM_u_halo_blur)
|
|
const float halo_blur = tileProps.is_text ? props.text_halo_blur : props.icon_halo_blur;
|
|
#else
|
|
const float halo_blur = frag_halo_blur;
|
|
#endif
|
|
|
|
if (bool(frag_is_icon)) {
|
|
const float alpha = opacity * frag_fade_opacity;
|
|
out_color = texture(icon_image, frag_tex) * alpha;
|
|
return;
|
|
}
|
|
|
|
const float EDGE_GAMMA = 0.105 / DEVICE_PIXEL_RATIO;
|
|
const float fontGamma = frag_font_scale * tileProps.gamma_scale;
|
|
const float fillGamma = EDGE_GAMMA / fontGamma;
|
|
const float haloGamma = (halo_blur * 1.19 / SDF_PX + EDGE_GAMMA) / fontGamma;
|
|
const float gamma = tileProps.is_halo ? haloGamma : fillGamma;
|
|
const float gammaScaled = gamma * frag_gamma_scale;
|
|
const vec4 color = tileProps.is_halo ? halo_color : fill_color;
|
|
const float fillInnerEdge = (256.0 - 64.0) / 256.0;
|
|
const float haloInnerEdge = fillInnerEdge + haloGamma * frag_gamma_scale;
|
|
const float innerEdge = tileProps.is_halo ? haloInnerEdge : fillInnerEdge;
|
|
const float dist = texture(glyph_image, frag_tex).a;
|
|
float alpha = smoothstep(innerEdge - gammaScaled, innerEdge + gammaScaled, dist);
|
|
if (tileProps.is_halo) {
|
|
// When drawing halos, if the fill is translucent we want
|
|
// the inside of the halo to be translucent as well
|
|
const float haloEdge = (6.0 - halo_width / frag_font_scale) / SDF_PX;
|
|
alpha = min(smoothstep(haloEdge - gammaScaled, haloEdge + gammaScaled, dist), 1.0 - alpha);
|
|
}
|
|
|
|
out_color = color * (alpha * opacity * frag_fade_opacity);
|
|
}
|
|
)";
|
|
};
|
|
|
|
} // namespace shaders
|
|
} // namespace mbgl
|