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58c7df469d
* replace one_minus_focal_x and abs_one_minus_focal_x variables with the actual expressions * replace division by r^2-1 with multiplication by reciprocal * revert chain selects to branchy code for clarity. Branching is dynamically uniform so shouldn't affect performance * add suggested comment describing gradient kind/flags constants
65 lines
1.6 KiB
WebGPU Shading Language
65 lines
1.6 KiB
WebGPU Shading Language
// SPDX-License-Identifier: Apache-2.0 OR MIT OR Unlicense
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// This must be kept in sync with the struct in src/encoding/resolve.rs
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struct Config {
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width_in_tiles: u32,
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height_in_tiles: u32,
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target_width: u32,
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target_height: u32,
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// The initial color applied to the pixels in a tile during the fine stage.
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// This is only used in the full pipeline. The format is packed RGBA8 in MSB
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// order.
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base_color: u32,
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n_drawobj: u32,
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n_path: u32,
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n_clip: u32,
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// To reduce the number of bindings, info and bin data are combined
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// into one buffer.
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bin_data_start: u32,
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// offsets within scene buffer (in u32 units)
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pathtag_base: u32,
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pathdata_base: u32,
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drawtag_base: u32,
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drawdata_base: u32,
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transform_base: u32,
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linewidth_base: u32,
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// Sizes of bump allocated buffers (in element size units)
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binning_size: u32,
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tiles_size: u32,
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segments_size: u32,
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ptcl_size: u32,
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}
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// Geometry of tiles and bins
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let TILE_WIDTH = 16u;
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let TILE_HEIGHT = 16u;
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// Number of tiles per bin
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let N_TILE_X = 16u;
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let N_TILE_Y = 16u;
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//let N_TILE = N_TILE_X * N_TILE_Y;
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let N_TILE = 256u;
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let BLEND_STACK_SPLIT = 4u;
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// The following are computed in draw_leaf from the generic gradient parameters
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// encoded in the scene, and stored in the gradient's info struct, for
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// consumption during fine rasterization.
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// Radial gradient kinds
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let RAD_GRAD_KIND_CIRCULAR = 1u;
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let RAD_GRAD_KIND_STRIP = 2u;
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let RAD_GRAD_KIND_FOCAL_ON_CIRCLE = 3u;
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let RAD_GRAD_KIND_CONE = 4u;
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// Radial gradient flags
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let RAD_GRAD_SWAPPED = 1u;
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