mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-25 18:05:12 -04:00
Matthew Stanley
19e526d57d
Apply the PS1 1023x511 size rule to every polygon triangle, line, and polyline continuation before widescreen transforms while preserving textured-command state latching. Co-authored-by: Martin Penkava <mpenkava1337@gmail.com> Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
35 lines
1.2 KiB
C
35 lines
1.2 KiB
C
#ifndef PSX_GPU_PRIMITIVE_REJECT_H
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#define PSX_GPU_PRIMITIVE_REJECT_H
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#include <stdint.h>
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/* PS1 hardware primitive-size rejection. Parsed coordinates are checked before
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* widescreen transforms and draw offsets; offsets do not change distances.
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* Quads are tested as their two rendered triangles independently. */
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static inline int psx_gpu_triangle_oversize(const int32_t* vx,
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const int32_t* vy,
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int a, int b, int c) {
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int32_t minx = vx[a], maxx = vx[a];
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if (vx[b] < minx) minx = vx[b];
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if (vx[b] > maxx) maxx = vx[b];
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if (vx[c] < minx) minx = vx[c];
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if (vx[c] > maxx) maxx = vx[c];
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if (maxx - minx > 1023) return 1;
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int32_t miny = vy[a], maxy = vy[a];
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if (vy[b] < miny) miny = vy[b];
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if (vy[b] > maxy) maxy = vy[b];
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if (vy[c] < miny) miny = vy[c];
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if (vy[c] > maxy) maxy = vy[c];
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return maxy - miny > 511;
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}
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static inline int psx_gpu_line_oversize(int32_t x0, int32_t y0,
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int32_t x1, int32_t y1) {
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int32_t dx = x0 > x1 ? x0 - x1 : x1 - x0;
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int32_t dy = y0 > y1 ? y0 - y1 : y1 - y0;
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return dx > 1023 || dy > 511;
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}
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#endif
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