The OpenGL renderer has always drawn shaded and texture-modulated pixels
at 8 bits per channel with no dither pattern (true colour). That stays the
default. 'on' applies the PS1 4x4 offset matrix and 5-bit truncation per
internal-resolution pixel; 'scaled' puts the pattern on the native grid,
so it reads like the console at any scale and the native VRAM is the same
at every internal resolution.
GP0(E1h) bit 9 reaches the backend through a new optional facade hook
(gr_set_dither) recorded for the render thread and Smooth motion redraws.
With the mode off nothing flushes and no uniform changes. Flat, raw and
other 5-bit-exact pixels are never touched.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
NVIDIA quantises the constant blend colour to the 8-bit target (0.5 ->
127/255), putting B/2+F/2 and B+F/4 one step under a k*8 boundary, so
gl_blend_accuracy_test failed there (2016 mismatches). With accurate
blending on, use 128/255 and 64/255: exact in unorm8, and the small upward
bias stays inside the PS1 truncation bucket for every 5-bit operand, so
fixed-point and float blenders agree. Passes on Apple M-series GL and an
RTX 4080 SUPER (NVIDIA 610.88). Default path unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Verifies the four PS1 semi-transparency modes, set-mask, mask check and
texel STP at 4x internal resolution with PGXP depth on and off, directly
and on the render thread, against the PS1 formulas and the software
rasterizer (new gl_blend_accuracy_test).
Finding: with the historical surface bases (fills and texels stored as
k*255/31, everything else as k*8) single-layer blends are off by one 5-bit
step in places (1312 of the test's checked pixels, e.g. B+F/4 over a fill).
[video] accurate_blending = true stores every VRAM write as k*8 so GL's
8-bit blend truncated by the readback is exactly the PS1 arithmetic; whites
of fills/texels then present as 248 like uploads already do. Default off.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Filter mode 3 magnifies textures with an edge-directed rule after Hyllian's
xBR (written from the published description, no code reused): for the
texel corner nearest a sample, weighted YUV colour distances over a 5x5
neighbourhood decide whether an edge runs along the corner's diagonal; if
so the corner is cut with an anti-aliased boundary and takes the closer
side neighbour. Flat areas, straight edges, gradients, cutouts and 1:1 draws
stay nearest. Selectable from [video] texture_filtering, settings.toml,
PSX_TEXTURE_FILTER and the new texture_filter TCP command. Default unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Enhancement arenas (GPU DMA aperture, Expansion-1 mod memory) were untracked, so Crash widescreen drew every vertex native with no depth. Adds depth stats/clear causes to pgxp, depth to pgxp_tri_ring, input_route_start at_frame, integer number keys in game.toml.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Some titles compute vibration for every pad but only send it over SIO to a
DualShock (R4 with a presented NeGcon). A trusted mod can now hand the runtime
DualShock motor values per seat; the host pad gets the louder of that and the
guest's SIO motors. Values lapse 8 VBlanks after the last call and are cleared
at every session reset, so nothing can stick on. Opt-in: no title that does
not call it changes. PSX_RUMBLE_TRACE now also logs headless.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
[video] fmv_chroma_smoothing = true makes the OpenGL present of a 24-bit
(MDEC) frame keep each sample's luma and take its chroma from a [1 2 1]
tent over the 3x3 source pixels, hiding the 2x2 colour blocks of 4:2:0
video without softening luma. Pairs with the existing fmv_filter upscale.
Guest VRAM/MDEC output untouched; 15-bit presents and the default unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
[video] texture_lod = "mipmap" emulates mip levels for PS1 texture pages,
which are decoded per fetch from VRAM and so have no GL mip chain: the
screen-space UV footprint of a minified, proven-3D primitive is box-averaged
(opaque texels of the fragment's STP class only), and anisotropic_filtering
(1..16) spreads that many taps along the footprint's major axis. Every tap
clamps to the primitive's UV bounds or texture window, so packed atlases
never bleed. The mode rides in the textured batch's filter key; off (the
default), sprites/HUD and magnified textures are unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Track an open GP0(A0) upload in the renderer whatever the HD state
(facade gr_vram_upload_begin/commit/set_open): HD activation mid-A0
waits for the commit instead of reading the FBO over received words,
and a full-VRAM load no longer ends the hold; gpu.c restores it from
gp0_state on load and ends it on GP1(01h). Sync the render thread
before flushing dumps or reading HD diagnostics, suppress dumps from
generated frames, use _putenv on MinGW, drop a stale log. Adversarial
fixtures for both cases in full-VRAM and high-resolution-window modes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
#575 stopped tracking generated/SCPH1001_*, but check_generated.sh and the
game-release template still required them, failing title release packaging.
SCPH1001 is now optional/local: complete -> noted, absent -> skipped with a
note, partial -> error.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Generated frames are presentation only: their replayed draws skip the CPU
raster and the pack flush, and textured draws resolve the same HD
replacements as the real frame. Drop the HD gate on frame generation. The
HD fixture runs a 30 Hz game with generation off and forced on: real frames
and native VRAM are identical, and every generated frame shows the HD HUD.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A GP0(A0) under HD authority takes the context at its header and keeps it
until the payload commits, so gpu.c's array holds every earlier native draw:
unwritten words keep queued draws and mask checks see the prior native mask.
Publication copies the whole private VRAM (no A0 can be open then), and
render_thread_stop publishes the final private draws before freeing them.
HD replacements and dumping no longer refuse startup or park the thread;
Smooth motion stays off under HD. Adds the review reproduction and #570's
HD safety cases with the render thread running.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
dynamic_resolution_min = "display" (game.toml, settings.toml,
PSX_DYNRES_MIN) floors the controller at the selected internal resolution
without the supersample factor, so with supersample > 1 it only trades
supersampling and never renders below the output. psx_dynres_floor_scale
in internal_resolution.h, tested in test_internal_resolution. OpenBIOS
emitter stamp regenerated (config_loader changed).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Shokunin