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Diffstat (limited to 'canvas.lv2/render.h')
| -rw-r--r-- | canvas.lv2/render.h | 592 |
1 files changed, 0 insertions, 592 deletions
diff --git a/canvas.lv2/render.h b/canvas.lv2/render.h deleted file mode 100644 index 2882c87..0000000 --- a/canvas.lv2/render.h +++ /dev/null @@ -1,592 +0,0 @@ -/* - * Copyright (c) 2016 Hanspeter Portner (dev@open-music-kontrollers.ch) - * - * This is free software: you can redistribute it and/or modify - * it under the terms of the Artistic License 2.0 as published by - * The Perl Foundation. - * - * This source is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * Artistic License 2.0 for more details. - * - * You should have received a copy of the Artistic License 2.0 - * along the source as a COPYING file. If not, obtain it from - * http://www.perlfoundation.org/artistic_license_2_0. - */ - -#ifndef _LV2_CANVAS_RENDER_H -#define _LV2_CANVAS_RENDER_H - -#include <assert.h> - -#include <canvas.lv2/canvas.h> - -#include <cairo/cairo.h> - -#ifdef __cplusplus -extern "C" { -#endif - -#define LV2_CANVAS_NUM_METHODS 26 - -typedef struct _LV2_Canvas_Meth LV2_Canvas_Meth; -typedef struct _LV2_Canvas LV2_Canvas; -typedef void (*LV2_Canvas_Func)(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body); - -struct _LV2_Canvas_Meth { - LV2_URID command; - LV2_Canvas_Func func; -}; - -struct _LV2_Canvas { - LV2_Canvas_URID urid; - LV2_Canvas_Meth methods [LV2_CANVAS_NUM_METHODS]; -}; - -static inline const float * -_lv2_canvas_render_get_float_vecs(LV2_Canvas_URID *urid, const LV2_Atom *body, - uint32_t *n) -{ - const LV2_Atom_Vector *vec = (const LV2_Atom_Vector *)body; - const float *flt = LV2_ATOM_CONTENTS_CONST(LV2_Atom_Vector, vec); - *n = (vec->atom.type == urid->forge.Vector) - && (vec->body.child_type == urid->forge.Float) - && (vec->body.child_size == sizeof(float)) - ? (vec->atom.size - sizeof(LV2_Atom_Vector_Body)) / vec->body.child_size - : 0; - - return flt; -} - -static inline const float * -_lv2_canvas_render_get_float_vec(LV2_Canvas_URID *urid, const LV2_Atom *body, - uint32_t n) -{ - uint32_t N; - const float *flt = _lv2_canvas_render_get_float_vecs(urid, body, &N); - - return n == N ? flt : NULL; -} - -static inline const void * -_lv2_canvas_render_get_type(const LV2_Atom *body, LV2_URID type) -{ - return body->type == type - ? LV2_ATOM_BODY_CONST(body) - : NULL; -} - -static inline void -_lv2_canvas_render_beginPath(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - cairo_new_sub_path(ctx); -} - -static inline void -_lv2_canvas_render_closePath(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - cairo_close_path(ctx); -} - -static inline void -_lv2_canvas_render_arc(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_float_vec(urid, body, 5); - - if(v) - { - cairo_arc(ctx, v[0], v[1], v[2], v[3], v[4]); - } -} - -static inline void -_lv2_canvas_render_curveTo(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_float_vec(urid, body, 6); - - if(v) - { - cairo_curve_to(ctx, v[0], v[1], v[2], v[3], v[4], v[5]); - } -} - -static inline void -_lv2_canvas_render_lineTo(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_float_vec(urid, body, 2); - - if(v) - { - cairo_line_to(ctx, v[0], v[1]); - } -} - -static inline void -_lv2_canvas_render_moveTo(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_float_vec(urid, body, 2); - - if(v) - { - cairo_move_to(ctx, v[0], v[1]); - } -} - -static inline void -_lv2_canvas_render_rectangle(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_float_vec(urid, body, 4); - - if(v) - { - cairo_rectangle(ctx, v[0], v[1], v[2], v[3]); - } -} - -static inline void -_lv2_canvas_render_polyline(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - uint32_t N; - const float *v = _lv2_canvas_render_get_float_vecs(urid, body, &N); - - if(v) - { - for(uint32_t i = 0; i < 2; i += 2) - { - cairo_move_to(ctx, v[i], v[i+1]); - } - - for(uint32_t i = 2; i < N; i += 2) - { - cairo_line_to(ctx, v[i], v[i+1]); - } - } -} - -static inline void -_lv2_canvas_render_style(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const int64_t *v = _lv2_canvas_render_get_type(body, urid->forge.Long); - - if(v) - { - const float r = (float)((*v >> 24) & 0xff) / 0xff; - const float g = (float)((*v >> 16) & 0xff) / 0xff; - const float b = (float)((*v >> 8) & 0xff) / 0xff; - const float a = (float)((*v >> 0) & 0xff) / 0xff; - - cairo_set_source_rgba(ctx, r, g, b, a); - } -} - -static inline void -_lv2_canvas_render_lineWidth(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_type(body, urid->forge.Float); - - if(v) - { - cairo_set_line_width(ctx, *v); - } -} - -static inline void -_lv2_canvas_render_lineDash(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_float_vec(urid, body, 2); - - if(v) - { - const double d[2] = {v[0], v[1]}; - cairo_set_dash(ctx, d, 2, 0); - } -} - -static inline void -_lv2_canvas_render_lineCap(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const LV2_URID *v = _lv2_canvas_render_get_type(body, urid->forge.URID); - - if(v) - { - cairo_line_cap_t cap = CAIRO_LINE_CAP_BUTT; - - if(*v == urid->Canvas_lineCapButt) - cap = CAIRO_LINE_CAP_BUTT; - else if(*v == urid->Canvas_lineCapRound) - cap = CAIRO_LINE_CAP_ROUND; - else if(*v == urid->Canvas_lineCapSquare) - cap = CAIRO_LINE_CAP_SQUARE; - - cairo_set_line_cap(ctx, cap); - } -} - -static inline void -_lv2_canvas_render_lineJoin(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const LV2_URID *v = _lv2_canvas_render_get_type(body, urid->forge.URID); - - if(v) - { - cairo_line_join_t join = CAIRO_LINE_JOIN_MITER; - - if(*v == urid->Canvas_lineJoinMiter) - join = CAIRO_LINE_JOIN_MITER; - else if(*v == urid->Canvas_lineJoinRound) - join = CAIRO_LINE_JOIN_ROUND; - else if(*v == urid->Canvas_lineJoinBevel) - join = CAIRO_LINE_JOIN_BEVEL; - - cairo_set_line_join(ctx, join); - } -} - -static inline void -_lv2_canvas_render_miterLimit(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_type(body, urid->forge.Float); - - if(v) - { - cairo_set_miter_limit(ctx, *v); - } -} - -static inline void -_lv2_canvas_render_stroke(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - cairo_stroke(ctx); -} - -static inline void -_lv2_canvas_render_fill(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - cairo_fill(ctx); -} - -static inline void -_lv2_canvas_render_clip(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - cairo_clip(ctx); -} - -static inline void -_lv2_canvas_render_save(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - cairo_save(ctx); -} - -static inline void -_lv2_canvas_render_restore(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - cairo_restore(ctx); -} - -static inline void -_lv2_canvas_render_translate(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_float_vec(urid, body, 2); - - if(v) - { - cairo_translate(ctx, v[0], v[1]); - } -} - -static inline void -_lv2_canvas_render_scale(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_float_vec(urid, body, 2); - - if(v) - { - cairo_scale(ctx, v[0], v[1]); - } -} - -static inline void -_lv2_canvas_render_rotate(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_type(body, urid->forge.Float); - - if(v) - { - cairo_rotate(ctx, *v); - } -} - -static inline void -_lv2_canvas_render_transform(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_float_vec(urid, body, 6); - - if(v) - { - const cairo_matrix_t matrix = { - .xx = v[0], - .xy = v[1], - .x0 = v[2], - .yy = v[3], - .yx = v[4], - .y0 = v[5] - }; - - cairo_transform(ctx, &matrix); - } -} - -static inline void -_lv2_canvas_render_reset(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - cairo_identity_matrix(ctx); -} - -static inline void -_lv2_canvas_render_fontSize(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const float *v = _lv2_canvas_render_get_type(body, urid->forge.Float); - - if(v) - { - cairo_set_font_size(ctx, *v); - } -} - -static inline void -_lv2_canvas_render_fillText(cairo_t *ctx, - LV2_Canvas_URID *urid, const LV2_Atom *body) -{ - const char *v = _lv2_canvas_render_get_type(body, urid->forge.String); - - if(v) - { - cairo_text_extents_t extents; - cairo_text_extents(ctx, v, &extents); - const float dx = extents.width/2 + extents.x_bearing; - const float dy = extents.height/2 + extents.y_bearing; - cairo_rel_move_to(ctx, -dx, -dy); - cairo_show_text(ctx, v); - } -} - -static inline void -_lv2_canvas_qsort(LV2_Canvas_Meth *A, int n) -{ - if(n < 2) - return; - - LV2_Canvas_Meth *p = A; - - int i = -1; - int j = n; - - while(true) - { - do { - i += 1; - } while(A[i].command < p->command); - - do { - j -= 1; - } while(A[j].command > p->command); - - if(i >= j) - break; - - const LV2_Canvas_Meth tmp = A[i]; - A[i] = A[j]; - A[j] = tmp; - } - - _lv2_canvas_qsort(A, j + 1); - _lv2_canvas_qsort(A + j + 1, n - j - 1); -} - -static inline LV2_Canvas_Meth * -_lv2_canvas_bsearch(LV2_URID p, LV2_Canvas_Meth *a, int n) -{ - LV2_Canvas_Meth *base = a; - - for(int N = n, half; N > 1; N -= half) - { - half = N/2; - LV2_Canvas_Meth *dst = &base[half]; - base = (dst->command > p) ? base : dst; - } - - return (base->command == p) ? base : NULL; -} - -static inline void -lv2_canvas_init(LV2_Canvas *canvas, LV2_URID_Map *map) -{ - lv2_canvas_urid_init(&canvas->urid, map); - - unsigned ptr = 0; - - canvas->methods[ptr].command = canvas->urid.Canvas_BeginPath; - canvas->methods[ptr++].func = _lv2_canvas_render_beginPath; - - canvas->methods[ptr].command = canvas->urid.Canvas_ClosePath; - canvas->methods[ptr++].func = _lv2_canvas_render_closePath; - - canvas->methods[ptr].command = canvas->urid.Canvas_Arc; - canvas->methods[ptr++].func = _lv2_canvas_render_arc; - - canvas->methods[ptr].command = canvas->urid.Canvas_CurveTo; - canvas->methods[ptr++].func = _lv2_canvas_render_curveTo; - - canvas->methods[ptr].command = canvas->urid.Canvas_LineTo; - canvas->methods[ptr++].func = _lv2_canvas_render_lineTo; - - canvas->methods[ptr].command = canvas->urid.Canvas_MoveTo; - canvas->methods[ptr++].func = _lv2_canvas_render_moveTo; - - canvas->methods[ptr].command = canvas->urid.Canvas_Rectangle; - canvas->methods[ptr++].func = _lv2_canvas_render_rectangle; - - canvas->methods[ptr].command = canvas->urid.Canvas_PolyLine; - canvas->methods[ptr++].func = _lv2_canvas_render_polyline; - - canvas->methods[ptr].command = canvas->urid.Canvas_Style; - canvas->methods[ptr++].func = _lv2_canvas_render_style; - - canvas->methods[ptr].command = canvas->urid.Canvas_LineWidth; - canvas->methods[ptr++].func = _lv2_canvas_render_lineWidth; - - canvas->methods[ptr].command = canvas->urid.Canvas_LineDash; - canvas->methods[ptr++].func = _lv2_canvas_render_lineDash; - - canvas->methods[ptr].command = canvas->urid.Canvas_LineCap; - canvas->methods[ptr++].func = _lv2_canvas_render_lineCap; - - canvas->methods[ptr].command = canvas->urid.Canvas_LineJoin; - canvas->methods[ptr++].func = _lv2_canvas_render_lineJoin; - - canvas->methods[ptr].command = canvas->urid.Canvas_MiterLimit; - canvas->methods[ptr++].func = _lv2_canvas_render_miterLimit; - - canvas->methods[ptr].command = canvas->urid.Canvas_Stroke; - canvas->methods[ptr++].func = _lv2_canvas_render_stroke; - - canvas->methods[ptr].command = canvas->urid.Canvas_Fill; - canvas->methods[ptr++].func = _lv2_canvas_render_fill; - - canvas->methods[ptr].command = canvas->urid.Canvas_Clip; - canvas->methods[ptr++].func = _lv2_canvas_render_clip; - - canvas->methods[ptr].command = canvas->urid.Canvas_Save; - canvas->methods[ptr++].func = _lv2_canvas_render_save; - - canvas->methods[ptr].command = canvas->urid.Canvas_Restore; - canvas->methods[ptr++].func = _lv2_canvas_render_restore; - - canvas->methods[ptr].command = canvas->urid.Canvas_Translate; - canvas->methods[ptr++].func = _lv2_canvas_render_translate; - - canvas->methods[ptr].command = canvas->urid.Canvas_Scale; - canvas->methods[ptr++].func = _lv2_canvas_render_scale; - - canvas->methods[ptr].command = canvas->urid.Canvas_Rotate; - canvas->methods[ptr++].func = _lv2_canvas_render_rotate; - - canvas->methods[ptr].command = canvas->urid.Canvas_Transform; - canvas->methods[ptr++].func = _lv2_canvas_render_transform; - - canvas->methods[ptr].command = canvas->urid.Canvas_Reset; - canvas->methods[ptr++].func = _lv2_canvas_render_reset; - - canvas->methods[ptr].command = canvas->urid.Canvas_FontSize; - canvas->methods[ptr++].func = _lv2_canvas_render_fontSize; - - canvas->methods[ptr].command = canvas->urid.Canvas_FillText; - canvas->methods[ptr++].func = _lv2_canvas_render_fillText; - - assert(ptr == LV2_CANVAS_NUM_METHODS); - - _lv2_canvas_qsort(canvas->methods, LV2_CANVAS_NUM_METHODS); -} - -static inline bool -lv2_canvas_render(LV2_Canvas *canvas, cairo_t *ctx, const LV2_Atom_Tuple *tup) -{ - LV2_Canvas_URID *urid = &canvas->urid; - - if(!tup || (tup->atom.type != urid->forge.Tuple) ) - return false; - - // save state - cairo_save(ctx); - - // clear surface - cairo_set_operator(ctx, CAIRO_OPERATOR_CLEAR); - cairo_paint(ctx); - - // default attributes - cairo_set_operator(ctx, CAIRO_OPERATOR_SOURCE); - cairo_set_font_size(ctx, 0.1); - cairo_set_line_width(ctx, 0.01); - cairo_set_source_rgba(ctx, 1.0, 1.0, 1.0, 1.0); - - LV2_ATOM_TUPLE_FOREACH(tup, itm) - { - if(lv2_atom_forge_is_object_type(&urid->forge, itm->type)) - { - const LV2_Atom_Object *obj = (const LV2_Atom_Object *)itm; - const LV2_Atom *body = NULL; - - lv2_atom_object_get(obj, urid->Canvas_body, &body, 0); - - LV2_Canvas_Meth *meth = _lv2_canvas_bsearch(obj->body.otype, - canvas->methods, LV2_CANVAS_NUM_METHODS); - - if(meth) - { - meth->func(ctx, urid, body); - } - } - } - - // save state - cairo_restore(ctx); - - // flush - cairo_surface_t *surface = cairo_get_target(ctx); - cairo_surface_flush(surface); - - return true; -} - -#ifdef __cplusplus -} -#endif - -#endif // CANVAS_IMPLEMENTATION |