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4de67d9081
Merge all static and dynamic buffers to just one, "memory". Add a malloc function for dynamic allocations. Unify static allocation offsets into a "config" buffer containing scene setup (number of paths, number of path segments), as well as the memory offsets of the static allocations. Finally, set an overflow flag when an allocation fail, and make sure to exit shader execution as soon as that triggers. Add checks before beginning execution in case the client wants to run two or more shaders before checking the flag. The "state" buffer is left alone because it needs zero'ing and because it is accessed with the "volatile" keyword. Fixes #40 Signed-off-by: Elias Naur <mail@eliasnaur.com>
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
// SPDX-License-Identifier: Apache-2.0 OR MIT OR Unlicense
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// Various constants for the sizes of groups and tiles.
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// Much of this will be made dynamic in various ways, but for now it's easiest
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// to hardcode and keep all in one place.
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// A LG_WG_FACTOR of n scales workgroup sizes by 2^n. Use 0 for a
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// maximum workgroup size of 128, or 1 for a maximum size of 256.
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#define LG_WG_FACTOR 1
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#define WG_FACTOR (1<<LG_WG_FACTOR)
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// TODO: compute all these
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#define WIDTH_IN_TILES 128
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#define HEIGHT_IN_TILES 96
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#define TILE_WIDTH_PX 16
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#define TILE_HEIGHT_PX 16
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#define PTCL_INITIAL_ALLOC 1024
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// These should probably be renamed and/or reworked. In the binning
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// kernel, they represent the number of bins. Also, the workgroup size
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// of that kernel is equal to the number of bins, but should probably
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// be more flexible (it's 512 in the K&L paper).
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#define N_TILE_X 16
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#define N_TILE_Y (8 * WG_FACTOR)
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#define N_TILE (N_TILE_X * N_TILE_Y)
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#define LG_N_TILE (7 + LG_WG_FACTOR)
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#define N_SLICE (N_TILE / 32)
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struct Config {
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uint n_elements; // paths
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uint n_pathseg;
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uint tile_base;
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uint bin_base;
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uint ptcl_base;
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uint pathseg_base;
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uint anno_base;
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};
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