@deck.gl/layers/dist/text-layer/text-background-layer/text-background-layer-vertex.glsl.js

deck.gl core layers

// deck.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
export default `\
#version 300 es
#define SHADER_NAME text-background-layer-vertex-shader
in vec2 positions;
in vec3 instancePositions;
in vec3 instancePositions64Low;
in vec4 instanceRects;
in float instanceSizes;
in float instanceAngles;
in vec2 instancePixelOffsets;
in float instanceLineWidths;
in vec4 instanceFillColors;
in vec4 instanceLineColors;
in vec3 instancePickingColors;
out vec4 vFillColor;
out vec4 vLineColor;
out float vLineWidth;
out vec2 uv;
out vec2 dimensions;
vec2 rotate_by_angle(vec2 vertex, float angle) {
float angle_radian = radians(angle);
float cos_angle = cos(angle_radian);
float sin_angle = sin(angle_radian);
mat2 rotationMatrix = mat2(cos_angle, -sin_angle, sin_angle, cos_angle);
return rotationMatrix * vertex;
}
void main(void) {
geometry.worldPosition = instancePositions;
geometry.uv = positions;
geometry.pickingColor = instancePickingColors;
uv = positions;
vLineWidth = instanceLineWidths;
float sizePixels = clamp(
project_size_to_pixel(instanceSizes * textBackground.sizeScale, textBackground.sizeUnits),
textBackground.sizeMinPixels, textBackground.sizeMaxPixels
);
dimensions = instanceRects.zw * sizePixels + textBackground.padding.xy + textBackground.padding.zw;
vec2 pixelOffset = (positions * instanceRects.zw + instanceRects.xy) * sizePixels + mix(-textBackground.padding.xy, textBackground.padding.zw, positions);
pixelOffset = rotate_by_angle(pixelOffset, instanceAngles);
pixelOffset += instancePixelOffsets;
pixelOffset.y *= -1.0;
if (textBackground.billboard)  {
gl_Position = project_position_to_clipspace(instancePositions, instancePositions64Low, vec3(0.0), geometry.position);
DECKGL_FILTER_GL_POSITION(gl_Position, geometry);
vec3 offset = vec3(pixelOffset, 0.0);
DECKGL_FILTER_SIZE(offset, geometry);
gl_Position.xy += project_pixel_size_to_clipspace(offset.xy);
} else {
vec3 offset_common = vec3(project_pixel_size(pixelOffset), 0.0);
DECKGL_FILTER_SIZE(offset_common, geometry);
gl_Position = project_position_to_clipspace(instancePositions, instancePositions64Low, offset_common, geometry.position);
DECKGL_FILTER_GL_POSITION(gl_Position, geometry);
}
vFillColor = vec4(instanceFillColors.rgb, instanceFillColors.a * layer.opacity);
DECKGL_FILTER_COLOR(vFillColor, geometry);
vLineColor = vec4(instanceLineColors.rgb, instanceLineColors.a * layer.opacity);
DECKGL_FILTER_COLOR(vLineColor, geometry);
}
`;
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