a650df219d
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
98 lines
3.5 KiB
GLSL
98 lines
3.5 KiB
GLSL
layout (location = 0) in vec2 a_pos;
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out vec3 v_data;
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layout (std140) uniform GlobalPaintParamsUBO {
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highp vec2 u_pattern_atlas_texsize;
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highp vec2 u_units_to_pixels;
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highp vec2 u_world_size;
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highp float u_camera_to_center_distance;
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highp float u_symbol_fade_change;
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highp float u_aspect_ratio;
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highp float u_pixel_ratio;
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highp float u_map_zoom;
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lowp float global_pad1;
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};
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layout (std140) uniform CircleDrawableUBO {
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highp mat4 u_matrix;
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highp vec2 u_extrude_scale;
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// Interpolations
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lowp float u_color_t;
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lowp float u_radius_t;
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lowp float u_blur_t;
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lowp float u_opacity_t;
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lowp float u_stroke_color_t;
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lowp float u_stroke_width_t;
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lowp float u_stroke_opacity_t;
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lowp float drawable_pad1;
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lowp float drawable_pad2;
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lowp float drawable_pad3;
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};
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layout (std140) uniform CircleEvaluatedPropsUBO {
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highp vec4 u_color;
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highp vec4 u_stroke_color;
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mediump float u_radius;
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lowp float u_blur;
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lowp float u_opacity;
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mediump float u_stroke_width;
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lowp float u_stroke_opacity;
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bool u_scale_with_map;
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bool u_pitch_with_map;
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lowp float props_pad1;
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};
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#pragma mapbox: define highp vec4 color
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#pragma mapbox: define mediump float radius
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#pragma mapbox: define lowp float blur
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#pragma mapbox: define lowp float opacity
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#pragma mapbox: define highp vec4 stroke_color
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#pragma mapbox: define mediump float stroke_width
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#pragma mapbox: define lowp float stroke_opacity
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void main(void) {
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#pragma mapbox: initialize highp vec4 color
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#pragma mapbox: initialize mediump float radius
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#pragma mapbox: initialize lowp float blur
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#pragma mapbox: initialize lowp float opacity
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#pragma mapbox: initialize highp vec4 stroke_color
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#pragma mapbox: initialize mediump float stroke_width
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#pragma mapbox: initialize lowp float stroke_opacity
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// unencode the extrusion vector that we snuck into the a_pos vector
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vec2 extrude = vec2(mod(a_pos, 2.0) * 2.0 - 1.0);
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// multiply a_pos by 0.5, since we had it * 2 in order to sneak
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// in extrusion data
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vec2 circle_center = floor(a_pos * 0.5);
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if (u_pitch_with_map) {
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vec2 corner_position = circle_center;
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if (u_scale_with_map) {
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corner_position += extrude * (radius + stroke_width) * u_extrude_scale;
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} else {
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// Pitching the circle with the map effectively scales it with the map
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// To counteract the effect for pitch-scale: viewport, we rescale the
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// whole circle based on the pitch scaling effect at its central point
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vec4 projected_center = u_matrix * vec4(circle_center, 0, 1);
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corner_position += extrude * (radius + stroke_width) * u_extrude_scale * (projected_center.w / u_camera_to_center_distance);
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}
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gl_Position = u_matrix * vec4(corner_position, 0, 1);
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} else {
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gl_Position = u_matrix * vec4(circle_center, 0, 1);
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if (u_scale_with_map) {
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gl_Position.xy += extrude * (radius + stroke_width) * u_extrude_scale * u_camera_to_center_distance;
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} else {
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gl_Position.xy += extrude * (radius + stroke_width) * u_extrude_scale * gl_Position.w;
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}
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}
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// This is a minimum blur distance that serves as a faux-antialiasing for
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// the circle. since blur is a ratio of the circle's size and the intent is
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// to keep the blur at roughly 1px, the two are inversely related.
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lowp float antialiasblur = 1.0 / DEVICE_PIXEL_RATIO / (radius + stroke_width);
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v_data = vec3(extrude.x, extrude.y, antialiasblur);
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}
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