tools: a test disc that writes into its textures a few bytes at a time

live_disc.py --atlas draws textures of every layout texel for texel and writes a little of each every frame. tools/vulkan/vk_parts.sh runs it on each renderer, with GPU decode and threaded rendering on and off: the pictures have to be the same, and the same as another core's when given.
2026-11-07 04:25:58 -10:00 · 2026-10-28 16:41:24 +01:00
1 parent 8245523a55
commit 1bdca17e0e
@@ -2,7 +2,7 @@
 """Write a bootable GD-ROM image (GDI + three track files) around the
 bare-metal test program in live_prog.c, for tools/threads/live.sh.

-Usage: live_disc.py out.gdi [--no-region-array | --mmu-align | --slant | --hscale | --cull]
+Usage: live_disc.py out.gdi [--no-region-array | --mmu-align | --slant | --hscale | --cull | --atlas]
       live_disc.py out.elf

 The program is carried here already compiled, so the test needs no SH-4
@@ -12,7 +12,8 @@ takes the build of it that renders without ever writing a region array;
 misaligned accesses; --slant the build with a slanted shaded triangle
 over the picture; --hscale that with the screen's renders through the X
 scaler as well; --cull the build with modifier volumes and translucent
-polygons of each cull mode.
+polygons of each cull mode; --atlas the build with textures written a few
+bytes at a time.
 The image is the least the core's HLE BIOS needs to boot it: an IP.BIN
 whose bootstrap jumps to the boot file, and an ISO 9660 volume holding
 1ST_READ.BIN.
@@ -2072,6 +2073,434 @@ ffffffff78563412efbeadde000001005345474120534547414b4154414e4120
 0000803fffffffff
 """)

+# The program built with -DLIVE_ATLAS (live_prog.c): with textures of every
+# layout drawn texel for texel, a few bytes of each written every frame,
+# for the texture cache's updates of parts of them (tools/vulkan/vk_parts.sh).
+PROGRAM_ATLAS = bytes.fromhex("""
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+""")
+
 # The same program built with -DLIVE_MMU_ALIGN: its MMU test also asks for
 # the address errors a misaligned access raises (live_prog.c). For a core
 # that keeps translations in a table, which they all do: it is the build
@@ -2630,7 +3059,7 @@ def main():
    if len(sys.argv) == 2 and sys.argv[1].endswith('.elf'):
        write_elf(sys.argv[1])
        return 0
-    if len(sys.argv) not in (2, 3) or sys.argv[2:] not in ([], ['--no-region-array'], ['--mmu-align'], ['--slant'], ['--hscale'], ['--cull']):
+    if len(sys.argv) not in (2, 3) or sys.argv[2:] not in ([], ['--no-region-array'], ['--mmu-align'], ['--slant'], ['--hscale'], ['--cull'], ['--atlas']):
        sys.stderr.write(__doc__)
        return 2
    out = sys.argv[1]
@@ -2645,6 +3074,8 @@ def main():
        program = PROGRAM_HSCALE
    elif sys.argv[2:] == ['--cull']:
        program = PROGRAM_CULL
+    elif sys.argv[2:] == ['--atlas']:
+        program = PROGRAM_ATLAS
    d = os.path.dirname(out) or '.'

    ip = bytearray(16 * 2048)
@@ -27,8 +27,8 @@
 * and paste the bytes of live_prog.bin into PROGRAM; the same again with
 * -DNO_REGION_ARRAY for PROGRAM_NO_REGION_ARRAY, with -DLIVE_MMU_ALIGN
 * for PROGRAM_MMU_ALIGN, with -DLIVE_SLANT for PROGRAM_SLANT, and with
- * -DLIVE_SLANT -DLIVE_HSCALE for PROGRAM_HSCALE, and with -DLIVE_CULL for
- * PROGRAM_CULL. */
+ * -DLIVE_SLANT -DLIVE_HSCALE for PROGRAM_HSCALE, with -DLIVE_CULL for
+ * PROGRAM_CULL, and with -DLIVE_ATLAS for PROGRAM_ATLAS. */
 typedef unsigned int u32;
 typedef unsigned short u16;
 #define PVR(off) (*(volatile u32 *)(0xA05F8000 + (off)))
@@ -504,6 +504,105 @@ static void ta_volume(u32 x0, u32 y0, u32 x1, u32 y1, u32 near)
   ta_send(0, 0, 0, 0, 0, 0, 0, 0);                    /* end of the volume list */
 }

+#ifdef LIVE_ATLAS
+/* With -DLIVE_ATLAS, over the top of the screen: textures of every
+ * layout, each drawn texel for texel at an internal resolution of 2x, a
+ * few bytes of every one of them written every frame from frame 64 on and
+ * now and then much of it, as a game writes into an atlas. Twiddled 565,
+ * 4444 512 by 512 and YUV; compressed; planar 4444 with a stride of 320
+ * (TEXT_CONTROL) and planar compressed 1555; 8-bit palette indices;
+ * mipmapped 565, drawn at five sizes for its levels. Not starting where
+ * the pieces of video memory a texture cache may watch them by start. */
+static const u32 atlas[][4] = {
+   /* address,  bytes,  texture control word (address apart),  texture size bits */
+   { 0x180000, 0x80000, (2u << 27),                           (6u << 3) | 6u },
+   { 0x100238, 0x20000, (1u << 27),                           (5u << 3) | 5u },
+   { 0x121828, 0x04800, (1u << 30) | (1u << 27),              (5u << 3) | 5u },
+   { 0x126f98, 0x0a000, (2u << 27) | (1u << 26) | (1u << 25), (5u << 3) | 3u },
+   { 0x14a000, 0x02800, (1u << 30) | (1u << 26),              (5u << 3) | 4u },
+   { 0x131000, 0x04000, (6u << 27),                           (4u << 3) | 4u },
+   { 0x141108, 0x08000, (3u << 27),                           (4u << 3) | 4u },
+   { 0x135040, 0x0aab0, (1u << 31) | (1u << 27),              (4u << 3) | 4u },
+};
+#define ATLAS_TEXTURES (sizeof(atlas) / sizeof(atlas[0]))
+/* Where each is drawn, and the mipmapped one (the last) four times more,
+ * smaller and smaller */
+static const u32 atlas_of[] = { 0, 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7 };
+static const float atlas_at[][4] = {
+   /* x0, y0, x1, y1 */
+   {   0.0f,   0.0f, 128.0f, 128.0f },
+   { 128.0f,   0.0f, 192.0f,  64.0f },
+   { 192.0f,   0.0f, 256.0f,  64.0f },
+   { 128.0f,  64.0f, 192.0f,  80.0f },
+   { 192.0f,  64.0f, 256.0f,  96.0f },
+   { 256.0f,   0.0f, 288.0f,  32.0f },
+   { 256.0f,  32.0f, 288.0f,  64.0f },
+   { 256.0f,  64.0f, 288.0f,  96.0f },
+   { 256.0f,  96.0f, 272.0f, 112.0f },
+   { 272.0f,  96.0f, 280.0f, 104.0f },
+   { 280.0f,  96.0f, 284.0f, 100.0f },
+   { 284.0f,  96.0f, 286.0f,  98.0f },
+};
+static u32 atlas_seed = 0x2545F491;
+
+static u32 atlas_rnd(void)
+{
+   atlas_seed ^= atlas_seed << 13;
+   atlas_seed ^= atlas_seed >> 17;
+   atlas_seed ^= atlas_seed << 5;
+   return atlas_seed;
+}
+
+/* @n halves of texture @i from its byte @at on */
+static void atlas_write(u32 i, u32 at, u32 n)
+{
+   volatile u16 *texel = (volatile u16 *)(0xA4000000 + atlas[i][0]);
+   u32 k;
+
+   at /= 2;
+   if (at + n > atlas[i][1] / 2)
+      n = atlas[i][1] / 2 - at;
+   for (k = 0; k < n; k++)
+      texel[at + k] = (u16)atlas_rnd();
+}
+
+/* A byte of texture @i (with no division: the program has none) */
+static u32 atlas_at_random(u32 i)
+{
+   return ((atlas_rnd() >> 16) * (atlas[i][1] >> 4)) >> 12;
+}
+
+static void atlas_frame(u32 frame)
+{
+   u32 i;
+
+   for (i = 0; i < ATLAS_TEXTURES; i++)
+   {
+      if (frame == 0)
+         atlas_write(i, 0, atlas[i][1] / 2);
+      else if ((frame & 31) == 31)
+         atlas_write(i, atlas_at_random(i), atlas[i][1] / 4);
+      else
+      {
+         atlas_write(i, atlas_at_random(i), 1 + (atlas_rnd() & 255));
+         atlas_write(i, atlas_at_random(i), 1 + (atlas_rnd() & 7));
+      }
+   }
+}
+
+static void ta_atlas(void)
+{
+   u32 q;
+
+   for (q = 0; q < sizeof(atlas_of) / sizeof(atlas_of[0]); q++)
+   {
+      const u32 i = atlas_of[q];
+      ta_quad(TA_TEXTURED, TSP_PLAIN | (4u << 8) | atlas[i][3], atlas[i][2] | (atlas[i][0] >> 3), 0xFFFFFFFF, F(0.95f),
+            F(atlas_at[q][0]), F(atlas_at[q][1]), F(atlas_at[q][2]), F(atlas_at[q][3]));
+   }
+}
+#endif
+
 /* What every render draws on top of the background: three polygons that
 * take shadows and a modifier volume that crosses them all.
 *
@@ -611,6 +710,9 @@ static void ta_scene(void)
   ta_send(TA_VERTEX, F(150.1f), F(205.9f), F(0.92f), 0, 0, 0xFF10E010, 0);
   ta_send(TA_VERTEX | TA_LAST, F(290.6f), F(130.2f), F(0.92f), 0, 0, 0xFF1010E0, 0);
 #endif
+#ifdef LIVE_ATLAS
+   ta_atlas();
+#endif
 #ifdef LIVE_CULL
   /* With -DLIVE_CULL, on the left: two white polygons that take shadows,
    * under the two volumes below, which differ only in their cull modes */
@@ -656,6 +758,7 @@ static void ta_scene(void)
   ta_send(0, 0, 0, 0, 0, 0, 0, 0);                    /* end of the translucent list */
 }

+
 /* A render to a texture: 128 by 128, at 0x700000 in video memory, orange
 * with its top left quarter blue. The screen's scene then has a polygon
 * with that texture, which has to show it the same way up. */
@@ -1791,6 +1894,10 @@ void cmain(void)
          * of two buffers in turn */
         if (frame >= 64)
         {
+#ifdef LIVE_ATLAS
+            atlas_frame(frame - 64);
+            PVR(0xE4) = 10;                            /* TEXT_CONTROL: a stride of 320 */
+#endif
            PVR(0x60) = (frame & 1) ? 0x400000 : 0x200000;   /* FB_W_SOF1 */
            render_to_texture();
            scene_in_part = frame >= 260;
@@ -0,0 +1,89 @@
+#!/bin/sh
+# Textures written a few bytes at a time, as a game writes into an atlas
+# (the test disc built with -DLIVE_ATLAS: tools/threads/live_disc.py
+# --atlas), with Vulkan, on a frontend that runs the core's frames as
+# RetroArch does (vk_hdr.c), under the validation layer. The texture
+# cache makes only the parts of them that changed again; for each
+# renderer, the picture is the same with the textures made on the GPU and
+# on the CPU, with threaded rendering on and off - and, given a second
+# core (one built before a change to the texture cache), the same as that
+# core's in each.
+#
+#   sh tools/vulkan/vk_parts.sh [core.so [other.so]]
+#
+# VKPARTS_FRAMES: how many frames are run before the picture is taken
+# (160 by default; the disc writes into its textures from frame 64 on, and
+# much of each at frames 95, 127, 159...). VKPARTS_RENDERERS: the lanes,
+# of per-triangle, per-strip, per-pixel and compute (all but compute by
+# default: lavapipe takes minutes over the compute renderer's frames).
+# KEEP=1: the pictures and logs are kept, in $TMPDIR/vk_parts.<pid>.
+#
+# Needs the core built with Vulkan, a Vulkan driver (lavapipe will do:
+# VK_DRIVER_FILES=/usr/share/vulkan/icd.d/lvp_icd.json) and python3 for
+# the test disc.
+set -e
+cd "$(dirname "$0")/../.."
+CORE=$(readlink -f "${1:-parallel_dc_libretro.so}")
+OTHER=${2:+$(readlink -f "$2")}
+WORK=${TMPDIR:-/tmp}/vk_parts.$$
+mkdir -p "$WORK"
+[ -n "${KEEP:-}" ] || trap 'rm -rf "$WORK"' EXIT
+${CC:-cc} -O1 -g -Wall -I./core/libretro-common/include -I./core/deps/khronos \
+   -DTARGET_NO_THREADS -o "$WORK/vk_hdr" tools/vulkan/vk_hdr.c tools/hdr/hdr_post_ref.c \
+   core/rend/hdr/hdr_output.c core/rend/hdr/hdr_transform.c core/rend/hdr/hdr_aces2.c \
+   core/rend/hdr/hdr_libretro.c core/rend/hdr/hdr_display.c -ldl -lm -lpthread
+python3 tools/threads/live_disc.py "$WORK/test.gdi" --atlas
+FRAMES=${VKPARTS_FRAMES:-160}
+RENDERERS=${VKPARTS_RENDERERS:-"per-triangle per-strip per-pixel"}
+fails=0
+
+# run <core> <name> <options...>: from nothing kept by an earlier run (the
+# disc writes to the memory card)
+run() {
+   run_core=$1; run_name=$2; shift 2
+   rm -rf "$WORK/dir"; mkdir -p "$WORK/dir"
+   VKH_DIR="$WORK/dir" VKH_FRONTEND=sdr "$WORK/vk_hdr" "$run_core" "$WORK/test.gdi" "$WORK/$run_name.raw" $FRAMES \
+      reicast_internal_resolution=2x "$@" > "$WORK/$run_name.log" 2>&1 || {
+      { echo "  FAIL: the $run_name run failed:"; tail -5 "$WORK/$run_name.log"; } >&2; return 1; }
+}
+
+for r in $RENDERERS; do
+   case $r in
+      per-triangle) set -- "reicast_alpha_sorting=per-triangle (normal)" ;;
+      per-strip) set -- "reicast_alpha_sorting=per-strip (fast, least accurate)" ;;
+      per-pixel) set -- "reicast_alpha_sorting=per-pixel (accurate)" ;;
+      compute) set -- "reicast_alpha_sorting=per-pixel (accurate)" "reicast_rendering_method=compute" ;;
+      *) echo "vk_parts: no renderer $r" >&2; exit 2 ;;
+   esac
+   echo "$r"
+   before=$fails
+   first=
+   for gpu in enabled disabled; do
+      for threaded in enabled disabled; do
+         name="$r-$gpu-$threaded"
+         run "$CORE" "$name" "$@" reicast_gpu_texture_decode=$gpu reicast_threaded_rendering=$threaded || { fails=$((fails + 1)); continue; }
+         if [ -z "$first" ]; then
+            first=$name
+         elif ! cmp -s "$WORK/$first.raw" "$WORK/$name.raw"; then
+            echo "  FAIL: the picture with GPU decode $gpu, threaded rendering $threaded is not the one with $first's"
+            fails=$((fails + 1))
+         fi
+         if [ -n "$OTHER" ]; then
+            run "$OTHER" "other-$name" "$@" reicast_gpu_texture_decode=$gpu reicast_threaded_rendering=$threaded || { fails=$((fails + 1)); continue; }
+            if ! cmp -s "$WORK/$name.raw" "$WORK/other-$name.raw"; then
+               echo "  FAIL: the picture with GPU decode $gpu, threaded rendering $threaded is not the other core's"
+               fails=$((fails + 1))
+            fi
+         fi
+      done
+   done
+   if [ $fails = $before ]; then
+      echo "  GPU decode on and off, threaded rendering on and off: the same picture${OTHER:+, the other core's}"
+   fi
+done
+
+if [ $fails != 0 ]; then
+   echo "vk_parts: $fails failed"
+   exit 1
+fi
+echo "vk_parts: all passed"