Squashed 'subprojects/pixpat/' content from commit d444626

git-subtree-dir: subprojects/pixpat
git-subtree-split: d444626e6ba988ec6d487800721e447f94b1eaf5

1 files changed, 64 insertions, 0 deletions

diff --git a/pixpat-native/src/pattern_catalog.h b/pixpat-native/src/pattern_catalog.h
new file mode 100644
index 0000000..6576b2b
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+++ b/pixpat-native/src/pattern_catalog.h
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+#pragma once
+
+// Catalog of every named pattern the C++ side knows. Mirrors the
+// shape of format_catalog.h. The X-macro is a list of
+// (Label, RgbType, YuvType, "name") rows:
+//
+//   X(Label, RgbType, YuvType, "name")
+//
+// `Label` is the C++ identifier doubling as the PatternId enum value
+// and the s_pattern_caps[] index. `RgbType` and `YuvType` resolve to
+// classes in `pixpat::patterns::` (defined in pattern.h) that satisfy
+// the pattern interface (sample(), Pixel) — one per color kind. Use
+// `void` if the pattern has no variant in that kind. At least one
+// must be non-void. When both are present, dispatch_draw_pattern
+// picks the variant matching the sink's color kind so the cross-kind
+// pass is a no-op; when only one is present, the pipeline runs the
+// cross-kind pass for the opposite-kind sinks. `name` is the
+// lowercase identifier exposed via the C ABI.
+//
+// Adding a pattern = a row here AND its class(es) in pattern.h. The
+// codegen (pixpat-native/codegen/gen_pixpat.py) parses this X-macro
+// to learn the pattern set; pixpat_pattern.cpp re-expands it to build
+// the dispatch arms and the default-pattern fallback.
+
+#include <cstddef>
+#include <cstdint>
+
+namespace pixpat
+{
+
+#define PIXPAT_PATTERN_LIST(X)                        \
+	X(Kmstest,   Kmstest,   void,      "kmstest") \
+	X(Smpte,     void,      Smpte,     "smpte")   \
+	X(Plain,     Plain,     void,      "plain")   \
+	X(Checker,   Checker,   void,      "checker") \
+	X(Hramp,     Hramp,     void,      "hramp")   \
+	X(Vramp,     Vramp,     void,      "vramp")   \
+	X(HBar,      HBarRGB,   HBarYUV,   "hbar")    \
+	X(VBar,      VBarRGB,   VBarYUV,   "vbar")    \
+	X(Dramp,     Dramp,     void,      "dramp")   \
+	X(Zoneplate, Zoneplate, void,      "zoneplate")
+
+enum class PatternId : uint8_t {
+#define X(label, rgb, yuv, name) label,
+	PIXPAT_PATTERN_LIST(X)
+#undef X
+	Unknown,
+};
+
+struct PatternEntry {
+	const char* name;
+	PatternId id;
+};
+
+inline constexpr PatternEntry s_pattern_table[] = {
+#define X(label, rgb, yuv, name) { name, PatternId::label },
+	PIXPAT_PATTERN_LIST(X)
+#undef X
+};
+
+inline constexpr size_t s_pattern_catalog_count =
+	sizeof(s_pattern_table) / sizeof(s_pattern_table[0]);
+
+} // namespace pixpat