142 lines
3.1 KiB
C
142 lines
3.1 KiB
C
// 6 september 2015
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#include "uipriv_unix.h"
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#include "draw.h"
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uiDrawContext *newContext(cairo_t *cr)
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{
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uiDrawContext *c;
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c = uiNew(uiDrawContext);
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c->cr = cr;
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return c;
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}
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void freeContext(uiDrawContext *c)
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{
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uiFree(c);
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}
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static cairo_pattern_t *mkbrush(uiDrawBrush *b)
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{
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cairo_pattern_t *pat;
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size_t i;
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switch (b->Type) {
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case uiDrawBrushTypeSolid:
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pat = cairo_pattern_create_rgba(b->R, b->G, b->B, b->A);
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break;
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case uiDrawBrushTypeLinearGradient:
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pat = cairo_pattern_create_linear(b->X0, b->Y0, b->X1, b->Y1);
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break;
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case uiDrawBrushTypeRadialGradient:
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// make the start circle radius 0 to make it a point
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pat = cairo_pattern_create_radial(
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b->X0, b->Y0, 0,
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b->X1, b->Y1, b->OuterRadius);
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break;
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// case uiDrawBrushTypeImage:
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}
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if (cairo_pattern_status(pat) != CAIRO_STATUS_SUCCESS)
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implbug("error creating pattern in mkbrush(): %s",
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cairo_status_to_string(cairo_pattern_status(pat)));
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switch (b->Type) {
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case uiDrawBrushTypeLinearGradient:
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case uiDrawBrushTypeRadialGradient:
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for (i = 0; i < b->NumStops; i++)
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cairo_pattern_add_color_stop_rgba(pat,
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b->Stops[i].Pos,
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b->Stops[i].R,
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b->Stops[i].G,
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b->Stops[i].B,
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b->Stops[i].A);
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}
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return pat;
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}
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void uiDrawStroke(uiDrawContext *c, uiDrawPath *path, uiDrawBrush *b, uiDrawStrokeParams *p)
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{
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cairo_pattern_t *pat;
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runPath(path, c->cr);
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pat = mkbrush(b);
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cairo_set_source(c->cr, pat);
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switch (p->Cap) {
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case uiDrawLineCapFlat:
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cairo_set_line_cap(c->cr, CAIRO_LINE_CAP_BUTT);
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break;
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case uiDrawLineCapRound:
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cairo_set_line_cap(c->cr, CAIRO_LINE_CAP_ROUND);
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break;
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case uiDrawLineCapSquare:
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cairo_set_line_cap(c->cr, CAIRO_LINE_CAP_SQUARE);
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break;
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}
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switch (p->Join) {
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case uiDrawLineJoinMiter:
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cairo_set_line_join(c->cr, CAIRO_LINE_JOIN_MITER);
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cairo_set_miter_limit(c->cr, p->MiterLimit);
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break;
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case uiDrawLineJoinRound:
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cairo_set_line_join(c->cr, CAIRO_LINE_JOIN_ROUND);
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break;
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case uiDrawLineJoinBevel:
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cairo_set_line_join(c->cr, CAIRO_LINE_JOIN_BEVEL);
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break;
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}
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cairo_set_line_width(c->cr, p->Thickness);
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cairo_set_dash(c->cr, p->Dashes, p->NumDashes, p->DashPhase);
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cairo_stroke(c->cr);
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cairo_pattern_destroy(pat);
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}
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void uiDrawFill(uiDrawContext *c, uiDrawPath *path, uiDrawBrush *b)
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{
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cairo_pattern_t *pat;
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runPath(path, c->cr);
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pat = mkbrush(b);
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cairo_set_source(c->cr, pat);
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switch (pathFillMode(path)) {
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case uiDrawFillModeWinding:
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cairo_set_fill_rule(c->cr, CAIRO_FILL_RULE_WINDING);
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break;
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case uiDrawFillModeAlternate:
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cairo_set_fill_rule(c->cr, CAIRO_FILL_RULE_EVEN_ODD);
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break;
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}
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cairo_fill(c->cr);
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cairo_pattern_destroy(pat);
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}
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void uiDrawTransform(uiDrawContext *c, uiDrawMatrix *m)
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{
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cairo_matrix_t cm;
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m2c(m, &cm);
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cairo_transform(c->cr, &cm);
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}
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void uiDrawClip(uiDrawContext *c, uiDrawPath *path)
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{
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runPath(path, c->cr);
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switch (pathFillMode(path)) {
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case uiDrawFillModeWinding:
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cairo_set_fill_rule(c->cr, CAIRO_FILL_RULE_WINDING);
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break;
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case uiDrawFillModeAlternate:
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cairo_set_fill_rule(c->cr, CAIRO_FILL_RULE_EVEN_ODD);
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break;
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}
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cairo_clip(c->cr);
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}
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void uiDrawSave(uiDrawContext *c)
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{
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cairo_save(c->cr);
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}
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void uiDrawRestore(uiDrawContext *c)
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{
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cairo_restore(c->cr);
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}
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