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ucode-mod-plutovg: add ucode binding for plutovg
Make the plutovg drawing API usable from ucode. Surfaces, canvases, paths, paints and font faces become ucode resource types with method tables, while colours, points, rectangles, matrices and gradient stops cross the boundary as plain ucode objects or arrays, so a whole scene can be built and mutated from script. Enumerations are spelled as strings rather than opaque integers. Each resource holds one plutovg reference and drops it from the type destructor; getters that return a borrowed pointer take a reference before wrapping it, so a canvas keeps its surface alive and nothing is released twice at collection time. The value conversion helpers live in a separate header installed into the staging directory because the plutosvg binding needs the same colour and rectangle marshalling. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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include $(TOPDIR)/rules.mk
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PKG_NAME:=ucode-mod-plutovg
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PKG_RELEASE:=1
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PKG_MAINTAINER:=Daniel Golle <daniel@makrotopia.org>
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PKG_LICENSE:=ISC
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PKG_LICENSE_FILES:=LICENSE
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include $(INCLUDE_DIR)/package.mk
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define Package/ucode-mod-plutovg
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SECTION:=libs
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CATEGORY:=Libraries
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SUBMENU:=ucode
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TITLE:=ucode binding for the plutovg 2D vector graphics library
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DEPENDS:=+libucode +plutovg
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endef
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define Package/ucode-mod-plutovg/description
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Exposes the plutovg drawing API to ucode scripts: surfaces, canvases,
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paths, matrices, solid, gradient and texture paints, stroking with dash
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patterns, clipping, compositing and text rendering. Colours, points,
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rectangles, matrices and gradient stops are passed as plain ucode
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objects or arrays.
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endef
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define Build/Configure
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endef
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define Build/Compile
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$(TARGET_CC) $(TARGET_CFLAGS) $(TARGET_CPPFLAGS) $(TARGET_LDFLAGS) \
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$(FPIC) -Wall -ffunction-sections -Wl,--gc-sections -shared \
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-o $(PKG_BUILD_DIR)/plutovg.so $(PKG_BUILD_DIR)/plutovg.c \
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-lplutovg
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endef
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define Build/InstallDev
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$(INSTALL_DIR) $(1)/usr/include
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$(CP) $(PKG_BUILD_DIR)/uc-plutovg.h $(1)/usr/include/
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endef
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define Package/ucode-mod-plutovg/install
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$(INSTALL_DIR) $(1)/usr/lib/ucode
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$(CP) $(PKG_BUILD_DIR)/plutovg.so $(1)/usr/lib/ucode/
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endef
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$(eval $(call BuildPackage,ucode-mod-plutovg))
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@@ -0,0 +1,13 @@
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Copyright (C) 2026 Daniel Golle <daniel@makrotopia.org>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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/*
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* Copyright (C) 2026 Daniel Golle <daniel@makrotopia.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef UC_PLUTOVG_H
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#define UC_PLUTOVG_H
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#include <plutovg/plutovg.h>
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#include <ucode/module.h>
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#define UC_PVG_SURFACE "plutovg.surface"
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#define UC_PVG_CANVAS "plutovg.canvas"
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#define UC_PVG_PATH "plutovg.path"
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#define UC_PVG_PAINT "plutovg.paint"
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#define UC_PVG_FONT_FACE "plutovg.font_face"
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static inline float
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uc_pvg_number(uc_value_t *uv, float fallback)
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{
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if (ucv_type(uv) != UC_INTEGER && ucv_type(uv) != UC_DOUBLE)
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return fallback;
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return (float)ucv_to_double(uv);
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}
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static inline bool
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uc_pvg_component(uc_value_t *uv, const char *key, size_t idx, float *out)
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{
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uc_value_t *val;
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if (ucv_type(uv) == UC_OBJECT)
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val = ucv_object_get(uv, key, NULL);
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else
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val = ucv_array_get(uv, idx);
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if (ucv_type(val) != UC_INTEGER && ucv_type(val) != UC_DOUBLE)
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return false;
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*out = (float)ucv_to_double(val);
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return true;
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}
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static inline bool
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uc_pvg_color_get(uc_value_t *uv, plutovg_color_t *color)
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{
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uc_value_t *alpha;
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if (ucv_type(uv) == UC_STRING)
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return plutovg_color_parse(color, ucv_string_get(uv),
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ucv_string_length(uv)) > 0;
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if (ucv_type(uv) != UC_OBJECT && ucv_type(uv) != UC_ARRAY)
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return false;
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if (!uc_pvg_component(uv, "r", 0, &color->r))
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return false;
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if (!uc_pvg_component(uv, "g", 1, &color->g))
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return false;
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if (!uc_pvg_component(uv, "b", 2, &color->b))
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return false;
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if (ucv_type(uv) == UC_OBJECT)
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alpha = ucv_object_get(uv, "a", NULL);
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else
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alpha = ucv_array_get(uv, 3);
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color->a = uc_pvg_number(alpha, 1.0f);
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return true;
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}
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static inline uc_value_t *
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uc_pvg_color_new(uc_vm_t *vm, const plutovg_color_t *color)
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{
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uc_value_t *rv = ucv_object_new(vm);
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ucv_object_add(rv, "r", ucv_double_new(color->r));
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ucv_object_add(rv, "g", ucv_double_new(color->g));
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ucv_object_add(rv, "b", ucv_double_new(color->b));
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ucv_object_add(rv, "a", ucv_double_new(color->a));
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return rv;
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}
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static inline bool
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uc_pvg_rect_get(uc_value_t *uv, plutovg_rect_t *rect)
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{
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if (ucv_type(uv) != UC_OBJECT && ucv_type(uv) != UC_ARRAY)
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return false;
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return uc_pvg_component(uv, "x", 0, &rect->x) &&
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uc_pvg_component(uv, "y", 1, &rect->y) &&
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uc_pvg_component(uv, "w", 2, &rect->w) &&
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uc_pvg_component(uv, "h", 3, &rect->h);
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}
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static inline uc_value_t *
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uc_pvg_rect_new(uc_vm_t *vm, const plutovg_rect_t *rect)
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{
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uc_value_t *rv = ucv_object_new(vm);
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ucv_object_add(rv, "x", ucv_double_new(rect->x));
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ucv_object_add(rv, "y", ucv_double_new(rect->y));
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ucv_object_add(rv, "w", ucv_double_new(rect->w));
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ucv_object_add(rv, "h", ucv_double_new(rect->h));
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return rv;
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}
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static inline bool
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uc_pvg_point_get(uc_value_t *uv, plutovg_point_t *point)
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{
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if (ucv_type(uv) != UC_OBJECT && ucv_type(uv) != UC_ARRAY)
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return false;
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return uc_pvg_component(uv, "x", 0, &point->x) &&
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uc_pvg_component(uv, "y", 1, &point->y);
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}
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static inline uc_value_t *
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uc_pvg_point_new(uc_vm_t *vm, const plutovg_point_t *point)
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{
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uc_value_t *rv = ucv_object_new(vm);
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ucv_object_add(rv, "x", ucv_double_new(point->x));
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ucv_object_add(rv, "y", ucv_double_new(point->y));
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return rv;
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}
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static inline bool
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uc_pvg_matrix_get(uc_value_t *uv, plutovg_matrix_t *matrix)
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{
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if (ucv_type(uv) == UC_STRING)
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return plutovg_matrix_parse(matrix, ucv_string_get(uv),
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ucv_string_length(uv));
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if (ucv_type(uv) != UC_OBJECT && ucv_type(uv) != UC_ARRAY)
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return false;
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return uc_pvg_component(uv, "a", 0, &matrix->a) &&
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uc_pvg_component(uv, "b", 1, &matrix->b) &&
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uc_pvg_component(uv, "c", 2, &matrix->c) &&
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uc_pvg_component(uv, "d", 3, &matrix->d) &&
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uc_pvg_component(uv, "e", 4, &matrix->e) &&
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uc_pvg_component(uv, "f", 5, &matrix->f);
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}
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static inline uc_value_t *
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uc_pvg_matrix_new(uc_vm_t *vm, const plutovg_matrix_t *matrix)
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{
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uc_value_t *rv = ucv_object_new(vm);
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ucv_object_add(rv, "a", ucv_double_new(matrix->a));
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ucv_object_add(rv, "b", ucv_double_new(matrix->b));
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ucv_object_add(rv, "c", ucv_double_new(matrix->c));
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ucv_object_add(rv, "d", ucv_double_new(matrix->d));
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ucv_object_add(rv, "e", ucv_double_new(matrix->e));
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ucv_object_add(rv, "f", ucv_double_new(matrix->f));
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return rv;
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}
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#endif
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