Adding upstream version 1.3+ds.upstream/1.3+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 184 insertions, 0 deletions

diff --git a/src/display/drawing-paintserver.cpp b/src/display/drawing-paintserver.cpp
new file mode 100644
index 0000000..e018d8b
--- /dev/null
+++ b/src/display/drawing-paintserver.cpp
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "drawing-paintserver.h"
+#include "cairo-utils.h"
+
+namespace Inkscape {
+
+DrawingPaintServer::~DrawingPaintServer() = default;
+
+cairo_pattern_t *DrawingSolidColor::create_pattern(cairo_t *, Geom::OptRect const &, double opacity) const
+{
+    return cairo_pattern_create_rgba(c[0], c[1], c[2], alpha * opacity);
+}
+
+void DrawingGradient::common_setup(cairo_pattern_t *pat, Geom::OptRect const &bbox, double opacity) const
+{
+    // set spread type
+    switch (spread) {
+        case SP_GRADIENT_SPREAD_REFLECT:
+            cairo_pattern_set_extend(pat, CAIRO_EXTEND_REFLECT);
+            break;
+        case SP_GRADIENT_SPREAD_REPEAT:
+            cairo_pattern_set_extend(pat, CAIRO_EXTEND_REPEAT);
+            break;
+        case SP_GRADIENT_SPREAD_PAD:
+        default:
+            cairo_pattern_set_extend(pat, CAIRO_EXTEND_PAD);
+            break;
+    }
+
+    // set pattern transform matrix
+    auto gs2user = transform;
+    if (units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX && bbox) {
+        auto bbox2user = Geom::Affine(bbox->width(), 0, 0, bbox->height(), bbox->left(), bbox->top());
+        gs2user *= bbox2user;
+    }
+    ink_cairo_pattern_set_matrix(pat, gs2user.inverse());
+}
+
+cairo_pattern_t *DrawingLinearGradient::create_pattern(cairo_t *, Geom::OptRect const &bbox, double opacity) const
+{
+    auto pat = cairo_pattern_create_linear(x1, y1, x2, y2);
+
+    common_setup(pat, bbox, opacity);
+
+    // add stops
+    for (auto &stop : stops) {
+        // multiply stop opacity by paint opacity
+        cairo_pattern_add_color_stop_rgba(pat, stop.offset, stop.color.v.c[0], stop.color.v.c[1], stop.color.v.c[2], stop.opacity * opacity);
+    }
+
+    return pat;
+}
+
+cairo_pattern_t *DrawingRadialGradient::create_pattern(cairo_t *ct, Geom::OptRect const &bbox, double opacity) const
+{
+    Geom::Point focus(fx, fy);
+    Geom::Point center(cx, cy);
+
+    double radius = r;
+    double focusr = fr;
+    double scale = 1.0;
+    double tolerance = cairo_get_tolerance(ct);
+
+    Geom::Affine gs2user = transform;
+
+    if (units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX && bbox) {
+        Geom::Affine bbox2user(bbox->width(), 0, 0, bbox->height(), bbox->left(), bbox->top());
+        gs2user *= bbox2user;
+    }
+
+    // we need to use vectors with the same direction to represent the transformed
+    // radius and the focus-center delta, because gs2user might contain non-uniform scaling
+    Geom::Point d(focus - center);
+    Geom::Point d_user(d.length(), 0);
+    Geom::Point r_user(radius, 0);
+    Geom::Point fr_user(focusr, 0);
+    d_user *= gs2user.withoutTranslation();
+    r_user *= gs2user.withoutTranslation();
+    fr_user *= gs2user.withoutTranslation();
+
+    double dx = d_user.x(), dy = d_user.y();
+    cairo_user_to_device_distance(ct, &dx, &dy);
+
+    // compute the tolerance distance in user space
+    // create a vector with the same direction as the transformed d,
+    // with the length equal to tolerance
+    double dl = hypot(dx, dy);
+    double tx = tolerance * dx / dl, ty = tolerance * dy / dl;
+    cairo_device_to_user_distance(ct, &tx, &ty);
+    double tolerance_user = hypot(tx, ty);
+
+    if (d_user.length() + tolerance_user > r_user.length()) {
+        scale = r_user.length() / d_user.length();
+
+        // nudge the focus slightly inside
+        scale *= 1.0 - 2.0 * tolerance / dl;
+    }
+
+    auto pat = cairo_pattern_create_radial(scale * d.x() + center.x(), scale * d.y() + center.y(), focusr, center.x(), center.y(), radius);
+
+    common_setup(pat, bbox, opacity);
+
+    // add stops
+    for (auto &stop : stops) {
+        // multiply stop opacity by paint opacity
+        cairo_pattern_add_color_stop_rgba(pat, stop.offset, stop.color.v.c[0], stop.color.v.c[1], stop.color.v.c[2], stop.opacity * opacity);
+    }
+
+    return pat;
+}
+
+cairo_pattern_t *DrawingMeshGradient::create_pattern(cairo_t *, Geom::OptRect const &bbox, double opacity) const
+{
+#ifdef MESH_DEBUG
+    std::cout << "sp_meshgradient_create_pattern: " << bbox << " " << opacity << std::endl;
+#endif
+
+    auto pat = cairo_pattern_create_mesh();
+
+    for (int i = 0; i < rows; i++) {
+        for (int j = 0; j < cols; j++) {
+            auto &data = patchdata[i][j];
+
+            cairo_mesh_pattern_begin_patch(pat);
+            cairo_mesh_pattern_move_to(pat, data.points[0][0].x(), data.points[0][0].y());
+
+            for (int k = 0; k < 4; k++) {
+                switch (data.pathtype[k]) {
+                case 'l':
+                case 'L':
+                case 'z':
+                case 'Z':
+                    cairo_mesh_pattern_line_to(pat, data.points[k][3].x(), data.points[k][3].y());
+                    break;
+                case 'c':
+                case 'C':
+                    cairo_mesh_pattern_curve_to(pat, data.points[k][1].x(), data.points[k][1].y(),
+                            data.points[k][2].x(), data.points[k][2].y(),
+                            data.points[k][3].x(), data.points[k][3].y());
+                    break;
+                default:
+                    // Shouldn't happen
+                    std::cerr << "sp_mesh_create_pattern: path error" << std::endl;
+                }
+
+                if (data.tensorIsSet[k]) {
+                    Geom::Point t = data.tensorpoints[k];
+                    cairo_mesh_pattern_set_control_point(pat, k, t.x(), t.y());
+                }
+
+                cairo_mesh_pattern_set_corner_color_rgba(pat, k,
+                                                         data.color[k][0],
+                        data.color[k][1],
+                        data.color[k][2],
+                        data.opacity[k] * opacity);
+            }
+
+            cairo_mesh_pattern_end_patch(pat);
+        }
+    }
+
+    // set pattern transform matrix
+    Geom::Affine gs2user = transform;
+    if (units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX && bbox) {
+        Geom::Affine bbox2user(bbox->width(), 0, 0, bbox->height(), bbox->left(), bbox->top());
+        gs2user *= bbox2user;
+    }
+    ink_cairo_pattern_set_matrix(pat, gs2user.inverse());
+
+    return pat;
+}
+
+} // namespace Inkscape
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :