diff options
Diffstat (limited to 'libs/cairo-1.16.0/src/cairo-vg-surface.c')
| -rw-r--r-- | libs/cairo-1.16.0/src/cairo-vg-surface.c | 1854 |
1 files changed, 1854 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/src/cairo-vg-surface.c b/libs/cairo-1.16.0/src/cairo-vg-surface.c new file mode 100644 index 0000000..7798633 --- /dev/null +++ b/libs/cairo-1.16.0/src/cairo-vg-surface.c @@ -0,0 +1,1854 @@ +/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */ +/* cairo - a vector graphics library with display and print output + * + * Copyright © 2008 Opened Hand Ltd. + * Copyright © 2009 Chris Wilson + * + * This library is free software; you can redistribute it and/or + * modify it either under the terms of the GNU Lesser General Public + * License version 2.1 as published by the Free Software Foundation + * (the "LGPL") or, at your option, under the terms of the Mozilla + * Public License Version 1.1 (the "MPL"). If you do not alter this + * notice, a recipient may use your version of this file under either + * the MPL or the LGPL. + * + * You should have received a copy of the LGPL along with this library + * in the file COPYING-LGPL-2.1; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA + * You should have received a copy of the MPL along with this library + * in the file COPYING-MPL-1.1 + * + * The contents of this file are subject to the Mozilla Public License + * Version 1.1 (the "License"); you may not use this file except in + * compliance with the License. You may obtain a copy of the License at + * http://www.mozilla.og/MPL/ + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY + * OF ANY KIND, either express or implied. See the LGPL or the MPL for + * the specific language governing rights and limitations. + * + * Contributor(s): + * Pierre Tardy <tardyp@gmail.com> + * Øyvind Kolås <pippin@gimp.org> + * Vladimi Vukicevic <vladimir@mozilla.com> (stubbed out base backend) + * Chris Wilson <chris@chris-wilson.co.uk> + */ + +#include "cairoint.h" + +#include "cairo-vg.h" + +#include "cairo-cache-private.h" +#include "cairo-default-context-private.h" +#include "cairo-error-private.h" +#include "cairo-image-surface-private.h" +#include "cairo-path-fixed-private.h" +#include "cairo-recording-surface-inline.h" +#include "cairo-surface-clipper-private.h" + +#include <pixman.h> +#include <VG/openvg.h> + +//#define OPENVG_DEBUG + +/* + * Work that needs to be done: + * - Glyph cache / proper font support + * + * - First-class paths + * Paths are expensive for OpenVG, reuse paths whenever possible. + * So add a path cache, and first class paths! + */ + +typedef struct _cairo_vg_surface cairo_vg_surface_t; + +/* XXX need GL specific context control. :( */ +struct _cairo_vg_context { + cairo_status_t status; + cairo_reference_count_t ref_count; + + unsigned long target_id; + + VGPaint paint; + cairo_vg_surface_t *source; + double alpha; + + cairo_cache_t snapshot_cache; + + void *display; + void *context; + + cairo_status_t (*create_target) (cairo_vg_context_t *, + cairo_vg_surface_t *); + cairo_status_t (*set_target) (cairo_vg_context_t *, + cairo_vg_surface_t *); + void (*destroy_target) (cairo_vg_context_t *, cairo_vg_surface_t *); +}; + +struct _cairo_vg_surface { + cairo_surface_t base; + + cairo_vg_context_t *context; + + VGImage image; + VGImageFormat format; + int width; + int height; + cairo_bool_t own_image; + + cairo_cache_entry_t snapshot_cache_entry; + + cairo_surface_clipper_t clipper; + + unsigned long target_id; +}; + +static const cairo_surface_backend_t cairo_vg_surface_backend; + +slim_hidden_proto (cairo_vg_surface_create); + +static cairo_surface_t * +_vg_surface_create_internal (cairo_vg_context_t *context, + VGImage image, + VGImageFormat format, + int width, int height); + +static cairo_vg_context_t * +_vg_context_reference (cairo_vg_context_t *context) +{ + assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&context->ref_count)); + + _cairo_reference_count_inc (&context->ref_count); + + return context; +} + +static cairo_vg_context_t * +_vg_context_lock (cairo_vg_context_t *context) +{ + /* XXX if we need to add locking, then it has to be recursive */ + return context; +} + +static cairo_int_status_t +_vg_context_set_target (cairo_vg_context_t *context, + cairo_vg_surface_t *surface) +{ + cairo_status_t status; + + if (surface->target_id == 0) { + status = context->create_target (context, surface); + if (unlikely (status)) + return status; + } + + if (context->target_id == surface->target_id) + return CAIRO_STATUS_SUCCESS; + + context->target_id = surface->target_id; + + return context->set_target (context, surface); +} + +static void +_vg_context_destroy_target (cairo_vg_context_t *context, + cairo_vg_surface_t *surface) +{ + if (surface->target_id == 0) + return; + + if (context->target_id == surface->target_id) + context->set_target (context, NULL); + + context->destroy_target (context, surface); +} + +static cairo_bool_t +_vg_snapshot_cache_can_remove (const void *entry) +{ + return TRUE; +} + +static void +_vg_snapshot_cache_remove (void *cache_entry) +{ + cairo_vg_surface_t *surface = cairo_container_of (cache_entry, + cairo_vg_surface_t, + snapshot_cache_entry); + surface->snapshot_cache_entry.hash = 0; + cairo_surface_destroy (&surface->base); +} + +static cairo_status_t +_vg_context_init (cairo_vg_context_t *context) +{ + cairo_status_t status; + + context->status = CAIRO_STATUS_SUCCESS; + CAIRO_REFERENCE_COUNT_INIT (&context->ref_count, 1); + + status = _cairo_cache_init (&context->snapshot_cache, + NULL, + _vg_snapshot_cache_can_remove, + _vg_snapshot_cache_remove, + 16*1024*1024); + if (unlikely (status)) + return status; + + context->target_id = 0; + context->source = NULL; + context->alpha = 1.0; + + context->paint = vgCreatePaint (); + vgLoadIdentity (); + + return CAIRO_STATUS_SUCCESS; +} + +static void +_vg_context_destroy (cairo_vg_context_t *context) +{ + assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&context->ref_count)); + + if (! _cairo_reference_count_dec_and_test (&context->ref_count)) + return; + + if (context->paint != VG_INVALID_HANDLE) + vgDestroyPaint (context->paint); + + _cairo_cache_fini (&context->snapshot_cache); + free (context); +} + +static void +_vg_context_unlock (cairo_vg_context_t *context) +{ +} + +#ifdef OPENVG_DEBUG +static void check_vg_errors(const char*function,int line) +{ + int err = vgGetError(); + if (err != VG_NO_ERROR){ + printf("%s+%d:vgError detected: 0x%08x.\n",function, line,err); + assert(err == VG_NO_ERROR); + } + +} +#define CHECK_VG_ERRORS() check_vg_errors(__FILE__,__LINE__) +#else +#define CHECK_VG_ERRORS() do{}while(0) +#endif //OPENVG_DEBUG + +static pixman_format_code_t +_vg_format_to_pixman (VGImageFormat format, + cairo_bool_t *needs_premult_fixup) +{ + *needs_premult_fixup = FALSE; + switch (format) { + /* RGB{A,X} channel ordering */ + case VG_sRGBX_8888: return PIXMAN_r8g8b8x8; + case VG_sRGBA_8888: *needs_premult_fixup = TRUE; return PIXMAN_r8g8b8a8; + case VG_sRGBA_8888_PRE: return PIXMAN_r8g8b8a8; + case VG_sRGB_565: return PIXMAN_r5g6b5; + case VG_sRGBA_5551: return 0; + case VG_sRGBA_4444: return 0; + case VG_sL_8: return PIXMAN_g8; + case VG_lRGBX_8888: return 0; + case VG_lRGBA_8888: return 0; + case VG_lRGBA_8888_PRE: return 0; + case VG_lL_8: return 0; + case VG_A_8: return PIXMAN_a8; + case VG_BW_1: return PIXMAN_a1; + case VG_A_1: return PIXMAN_a1; + case VG_A_4: return PIXMAN_a4; + + /* {A,X}RGB channel ordering */ + case VG_sXRGB_8888: return PIXMAN_x8r8g8b8; + case VG_sARGB_8888: *needs_premult_fixup = TRUE; return PIXMAN_a8r8g8b8; + case VG_sARGB_8888_PRE: return PIXMAN_a8r8g8b8; + case VG_sARGB_1555: return 0; + case VG_sARGB_4444: return 0; + case VG_lXRGB_8888: return 0; + case VG_lARGB_8888: return 0; + case VG_lARGB_8888_PRE: return 0; + + /* BGR{A,X} channel ordering */ + case VG_sBGRX_8888: return PIXMAN_b8g8r8x8; + case VG_sBGRA_8888: *needs_premult_fixup = TRUE; return PIXMAN_b8g8r8a8; + case VG_sBGRA_8888_PRE: return PIXMAN_b8g8r8a8; + case VG_sBGR_565: return PIXMAN_b5g6r5; + case VG_sBGRA_5551: return 0; + case VG_sBGRA_4444: return 0; + case VG_lBGRX_8888: return 0; + case VG_lBGRA_8888: return 0; + case VG_lBGRA_8888_PRE: return 0; + + /* {A,X}BGR channel ordering */ + case VG_sXBGR_8888: return PIXMAN_x8b8g8r8; + case VG_sABGR_8888: *needs_premult_fixup = TRUE; return PIXMAN_a8b8g8r8; + case VG_sABGR_8888_PRE: return PIXMAN_a8b8g8r8; + case VG_sABGR_1555: return 0; + case VG_sABGR_4444: return 0; + case VG_lXBGR_8888: return 0; + case VG_lABGR_8888: return 0; + case VG_lABGR_8888_PRE: return 0; + default: return 0; + } +} + +static pixman_format_code_t +_vg_format_to_content (VGImageFormat format) +{ + /* XXX could use more simple bit tests */ + switch (format) { + /* RGB{A,X} channel ordering */ + case VG_sRGBX_8888: return CAIRO_CONTENT_COLOR; + case VG_sRGBA_8888: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sRGBA_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sRGB_565: return CAIRO_CONTENT_COLOR; + case VG_sRGBA_5551: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sRGBA_4444: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sL_8: return CAIRO_CONTENT_ALPHA; + case VG_lRGBX_8888: return CAIRO_CONTENT_COLOR; + case VG_lRGBA_8888: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_lRGBA_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_lL_8: return CAIRO_CONTENT_ALPHA; + case VG_A_8: return CAIRO_CONTENT_ALPHA; + case VG_A_4: return CAIRO_CONTENT_ALPHA; + case VG_A_1: return CAIRO_CONTENT_ALPHA; + case VG_BW_1: return CAIRO_CONTENT_ALPHA; + + /* {A,X}RGB channel ordering */ + case VG_sXRGB_8888: return CAIRO_CONTENT_COLOR; + case VG_sARGB_8888: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sARGB_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sARGB_1555: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sARGB_4444: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_lXRGB_8888: return CAIRO_CONTENT_COLOR; + case VG_lARGB_8888: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_lARGB_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA; + + /* BGR{A,X} channel ordering */ + case VG_sBGRX_8888: return CAIRO_CONTENT_COLOR; + case VG_sBGRA_8888: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sBGRA_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sBGR_565: return CAIRO_CONTENT_COLOR; + case VG_sBGRA_5551: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sBGRA_4444: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_lBGRX_8888: return CAIRO_CONTENT_COLOR; + case VG_lBGRA_8888: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_lBGRA_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA; + + /* {A,X}BGR channel ordering */ + case VG_sXBGR_8888: return CAIRO_CONTENT_COLOR; + case VG_sABGR_8888: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sABGR_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sABGR_1555: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_sABGR_4444: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_lXBGR_8888: return CAIRO_CONTENT_COLOR; + case VG_lABGR_8888: return CAIRO_CONTENT_COLOR_ALPHA; + case VG_lABGR_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA; + default: return 0; + } +} + +static VGImageFormat +_vg_format_from_pixman (pixman_format_code_t format) +{ + /* XXX _PRE needs fixup */ + switch ((int) format) { + case PIXMAN_r5g6b5: return VG_sRGB_565; + case PIXMAN_g8: return VG_sL_8; + case PIXMAN_a8: return VG_A_8; + case PIXMAN_a1: return VG_BW_1; + case PIXMAN_x8r8g8b8: return VG_sXRGB_8888; + case PIXMAN_a8r8g8b8: return VG_sARGB_8888; // _PRE + case PIXMAN_b8g8r8x8: return VG_sBGRX_8888; + case PIXMAN_b8g8r8a8: return VG_sBGRA_8888; // _PRE + case PIXMAN_b5g6r5: return VG_sBGR_565; + case PIXMAN_x8b8g8r8: return VG_sXBGR_8888; + case PIXMAN_a8b8g8r8: return VG_sABGR_8888; // _PRE + default: return 0; + } +} + +static VGImageFormat +_vg_format_for_content (cairo_content_t content) +{ + switch (content) { + case CAIRO_CONTENT_ALPHA: return VG_A_8; + case CAIRO_CONTENT_COLOR: return VG_sXRGB_8888; + default: ASSERT_NOT_REACHED; + case CAIRO_CONTENT_COLOR_ALPHA: return VG_sARGB_8888; // _PRE + } +} + +static cairo_surface_t * +_vg_surface_create_similar (void *abstract_surface, + cairo_content_t content, + int width, + int height) +{ + cairo_vg_surface_t *surface = abstract_surface; + + if (width > vgGeti (VG_MAX_IMAGE_WIDTH) || + height > vgGeti (VG_MAX_IMAGE_HEIGHT)) + { + return NULL; + } + + return cairo_vg_surface_create (surface->context, content, width, height); +} + +static cairo_status_t +_vg_surface_clipper_intersect_clip_path (cairo_surface_clipper_t *clipper, + cairo_path_fixed_t *path, + cairo_fill_rule_t fill_rule, + double tolerance, + cairo_antialias_t antialias) +{ + cairo_vg_surface_t *surface = cairo_container_of (clipper, + cairo_vg_surface_t, + clipper); + cairo_vg_surface_t *mask; + cairo_status_t status; + + if (path == NULL) { + vgMask (VG_INVALID_HANDLE, + VG_FILL_MASK, 0, 0, surface->width, surface->height); + vgSeti (VG_MASKING, VG_FALSE); + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; + } + + mask = (cairo_vg_surface_t *) + _vg_surface_create_similar (surface, CAIRO_CONTENT_ALPHA, + surface->width, surface->height); + if (unlikely (mask == NULL)) + return CAIRO_INT_STATUS_UNSUPPORTED; + if (unlikely (mask->base.status)) + return mask->base.status; + + status = _cairo_surface_fill (&mask->base, + CAIRO_OPERATOR_SOURCE, + &_cairo_pattern_white.base, + path, fill_rule, tolerance, antialias, + NULL); + if (status) { + cairo_surface_destroy (&mask->base); + return status; + } + + vgSeti (VG_MASKING, VG_TRUE); + vgMask (mask->image, VG_INTERSECT_MASK, 0, 0, mask->width, mask->height); + + cairo_surface_destroy (&mask->base); + + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; +} + +static cairo_bool_t +_vg_surface_get_extents (void *abstract_surface, + cairo_rectangle_int_t *extents) +{ + cairo_vg_surface_t *surface = abstract_surface; + + extents->x = 0; + extents->y = 0; + extents->width = surface->width; + extents->height = surface->height; + + return TRUE; +} + +#define MAX_SEG 16 /* max number of knots to upload in a batch */ + +typedef struct _vg_path { + VGPath path; + const cairo_matrix_t *ctm_inverse; + + VGubyte gseg[MAX_SEG]; + VGfloat gdata[MAX_SEG*3*2]; + int dcount; + int scount; +} vg_path_t; + +static cairo_status_t +_vg_move_to (void *closure, + const cairo_point_t *point) +{ + vg_path_t *path = closure; + double x = _cairo_fixed_to_double (point->x); + double y = _cairo_fixed_to_double (point->y); + + if (path->ctm_inverse) + cairo_matrix_transform_point (path->ctm_inverse, &x, &y); + + path->gseg[path->scount++] = VG_MOVE_TO; + path->gdata[path->dcount++] = x; + path->gdata[path->dcount++] = y; + + if (path->scount >= MAX_SEG-1) { + vgAppendPathData (path->path, path->scount, path->gseg, path->gdata); + path->scount = 0; + path->dcount = 0; + } + + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +_vg_line_to (void *closure, + const cairo_point_t *point) +{ + vg_path_t *path = closure; + double x = _cairo_fixed_to_double (point->x); + double y = _cairo_fixed_to_double (point->y); + + if (path->ctm_inverse) + cairo_matrix_transform_point (path->ctm_inverse, &x, &y); + + path->gseg[path->scount++] = VG_LINE_TO; + path->gdata[path->dcount++] = x; + path->gdata[path->dcount++] = y; + + if (path->scount >= MAX_SEG-1) { + vgAppendPathData (path->path, path->scount, path->gseg, path->gdata); + path->scount = 0; + path->dcount = 0; + } + + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +_vg_curve_to (void *closure, + const cairo_point_t *p0, + const cairo_point_t *p1, + const cairo_point_t *p2) +{ + vg_path_t *path = closure; + double x0 = _cairo_fixed_to_double (p0->x); + double y0 = _cairo_fixed_to_double (p0->y); + double x1 = _cairo_fixed_to_double (p1->x); + double y1 = _cairo_fixed_to_double (p1->y); + double x2 = _cairo_fixed_to_double (p2->x); + double y2 = _cairo_fixed_to_double (p2->y); + + if (path->ctm_inverse) { + cairo_matrix_transform_point (path->ctm_inverse, &x0, &y0); + cairo_matrix_transform_point (path->ctm_inverse, &x1, &y1); + cairo_matrix_transform_point (path->ctm_inverse, &x2, &y2); + } + + path->gseg[path->scount++] = VG_CUBIC_TO; + path->gdata[path->dcount++] = x0; + path->gdata[path->dcount++] = y0; + path->gdata[path->dcount++] = x1; + path->gdata[path->dcount++] = y1; + path->gdata[path->dcount++] = x2; + path->gdata[path->dcount++] = y2; + + if (path->scount >= MAX_SEG-1) { + vgAppendPathData(path->path, path->scount, path->gseg, path->gdata); + path->scount = 0; + path->dcount = 0; + } + + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +_vg_close_path (void *closure) +{ + vg_path_t *path = closure; + + path->gseg[path->scount++] = VG_CLOSE_PATH; + + if (path->scount >= MAX_SEG-1) { + vgAppendPathData (path->path, path->scount, path->gseg, path->gdata); + path->scount = 0; + path->dcount = 0; + } + + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; +} + +static void +_vg_path_from_cairo (vg_path_t *vg_path, + const cairo_path_fixed_t *path) +{ + cairo_status_t status; + + vg_path->scount = 0; + vg_path->dcount = 0; + + status = _cairo_path_fixed_interpret (path, + _vg_move_to, + _vg_line_to, + _vg_curve_to, + _vg_close_path, + vg_path); + assert (status == CAIRO_STATUS_SUCCESS); + + vgAppendPathData (vg_path->path, + vg_path->scount, vg_path->gseg, vg_path->gdata); + CHECK_VG_ERRORS(); +} + +static cairo_bool_t +_vg_is_supported_operator (cairo_operator_t op) +{ + switch ((int) op) { + case CAIRO_OPERATOR_SOURCE: + case CAIRO_OPERATOR_OVER: + case CAIRO_OPERATOR_IN: + case CAIRO_OPERATOR_DEST_OVER: + case CAIRO_OPERATOR_DEST_IN: + case CAIRO_OPERATOR_ADD: + return TRUE; + + default: + return FALSE; + } +} + +static VGBlendMode +_vg_operator (cairo_operator_t op) +{ + switch ((int) op) { + case CAIRO_OPERATOR_SOURCE: + return VG_BLEND_SRC; + case CAIRO_OPERATOR_OVER: + return VG_BLEND_SRC_OVER; + case CAIRO_OPERATOR_IN: + return VG_BLEND_SRC_IN; + case CAIRO_OPERATOR_DEST_OVER: + return VG_BLEND_DST_OVER; + case CAIRO_OPERATOR_DEST_IN: + return VG_BLEND_DST_IN; + case CAIRO_OPERATOR_ADD: + return VG_BLEND_ADDITIVE; + default: + ASSERT_NOT_REACHED; + return VG_BLEND_SRC_OVER; + } +} + +static VGFillRule +_vg_fill_rule_from_cairo (cairo_fill_rule_t rule) +{ + switch (rule) { + case CAIRO_FILL_RULE_EVEN_ODD: return VG_EVEN_ODD; + case CAIRO_FILL_RULE_WINDING: return VG_NON_ZERO; + } + + ASSERT_NOT_REACHED; + return VG_NON_ZERO; +} + +static VGRenderingQuality +_vg_rendering_quality_from_cairo (cairo_antialias_t aa) +{ + switch (aa) { + case CAIRO_ANTIALIAS_DEFAULT: + case CAIRO_ANTIALIAS_SUBPIXEL: + case CAIRO_ANTIALIAS_GOOD: + case CAIRO_ANTIALIAS_BEST: + return VG_RENDERING_QUALITY_BETTER; + + case CAIRO_ANTIALIAS_GRAY: + case CAIRO_ANTIALIAS_FAST: + return VG_RENDERING_QUALITY_FASTER; + + case CAIRO_ANTIALIAS_NONE: + return VG_RENDERING_QUALITY_NONANTIALIASED; + } + + ASSERT_NOT_REACHED; + return VG_RENDERING_QUALITY_BETTER; +} + +static VGCapStyle +_vg_line_cap_from_cairo (cairo_line_cap_t cap) +{ + switch (cap) { + case CAIRO_LINE_CAP_BUTT: return VG_CAP_BUTT; + case CAIRO_LINE_CAP_ROUND: return VG_CAP_ROUND; + case CAIRO_LINE_CAP_SQUARE: return VG_CAP_SQUARE; + } + + ASSERT_NOT_REACHED; + return VG_CAP_BUTT; +} + +static VGJoinStyle +_vg_line_join_from_cairo (cairo_line_join_t join) +{ + switch (join) { + case CAIRO_LINE_JOIN_MITER: return VG_JOIN_MITER; + case CAIRO_LINE_JOIN_ROUND: return VG_JOIN_ROUND; + case CAIRO_LINE_JOIN_BEVEL: return VG_JOIN_BEVEL; + } + + ASSERT_NOT_REACHED; + return VG_JOIN_MITER; +} + +static void +_vg_matrix_from_cairo (VGfloat *dst, const cairo_matrix_t *src) +{ + dst[0] = /* sx */ src->xx; + dst[1] = /* shy */ src->yx; + dst[2] = /* w0 */ 0; + dst[3] = /* shx */ src->xy; + dst[4] = /* sy */ src->yy; + dst[5] = /* w1 */ 0; + dst[6] = /* tx */ src->x0; + dst[7] = /* ty */ src->y0; + dst[8] = /* w2 */ 0; +} + +static cairo_status_t +_vg_setup_gradient_stops (cairo_vg_context_t *context, + const cairo_gradient_pattern_t *pattern) +{ + VGint numstops = pattern->n_stops; + VGfloat *stops, stack_stops[CAIRO_STACK_ARRAY_LENGTH (VGfloat)]; + int i; + + if (numstops*5 < ARRAY_LENGTH (stack_stops)) { + stops = stack_stops; + } else { + stops = _cairo_malloc_ab (numstops, 5*sizeof (VGfloat)); + if (unlikely (stops == NULL)) + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + } + + for (i = 0; i < numstops; i++) { + stops[i*5 + 0] = pattern->stops[i].offset; + stops[i*5 + 1] = pattern->stops[i].color.red; + stops[i*5 + 2] = pattern->stops[i].color.green; + stops[i*5 + 3] = pattern->stops[i].color.blue; + stops[i*5 + 4] = pattern->stops[i].color.alpha * context->alpha; + } + + vgSetParameterfv (context->paint, + VG_PAINT_COLOR_RAMP_STOPS, numstops * 5, stops); + + if (stops != stack_stops) + free (stops); + + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; +} + +static void +_vg_set_source_matrix (const cairo_pattern_t *pat) +{ + cairo_matrix_t mat; + cairo_status_t status; + VGfloat vmat[9]; + + mat = pat->matrix; + status = cairo_matrix_invert (&mat); + assert (status == CAIRO_STATUS_SUCCESS); + + _vg_matrix_from_cairo (vmat, &mat); + + vgSeti (VG_MATRIX_MODE, VG_MATRIX_FILL_PAINT_TO_USER); + vgLoadMatrix (vmat); + vgSeti (VG_MATRIX_MODE, VG_MATRIX_STROKE_PAINT_TO_USER); + vgLoadMatrix (vmat); + vgSeti (VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE); + + CHECK_VG_ERRORS(); +} + +static cairo_status_t +_vg_setup_linear_source (cairo_vg_context_t *context, + const cairo_linear_pattern_t *lpat) +{ + VGfloat linear[4]; + + linear[0] = lpat->pd1.x; + linear[1] = lpat->pd1.y; + linear[2] = lpat->pd2.x; + linear[3] = lpat->pd2.y; + + vgSetParameteri (context->paint, + VG_PAINT_COLOR_RAMP_SPREAD_MODE, + VG_COLOR_RAMP_SPREAD_PAD); + vgSetParameteri (context->paint, + VG_PAINT_TYPE, + VG_PAINT_TYPE_LINEAR_GRADIENT); + vgSetParameterfv (context->paint, + VG_PAINT_LINEAR_GRADIENT, 4, linear); + + _vg_set_source_matrix (&lpat->base.base); + + CHECK_VG_ERRORS(); + return _vg_setup_gradient_stops (context, &lpat->base); + +} + +static cairo_status_t +_vg_setup_radial_source (cairo_vg_context_t *context, + const cairo_radial_pattern_t *rpat) +{ + VGfloat radial[5]; + + radial[0] = rpat->cd1.center.x; + radial[1] = rpat->cd1.center.y; + radial[2] = rpat->cd2.center.x; + radial[3] = rpat->cd2.center.y; + radial[4] = rpat->cd2.radius; + + vgSetParameteri (context->paint, + VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_PAD); + vgSetParameteri (context->paint, + VG_PAINT_TYPE, VG_PAINT_TYPE_RADIAL_GRADIENT); + vgSetParameterfv (context->paint, + VG_PAINT_RADIAL_GRADIENT, 5, radial); + + _vg_set_source_matrix (&rpat->base.base); + + /* FIXME: copy/adapt fixes from SVG backend to add inner radius */ + + CHECK_VG_ERRORS(); + return _vg_setup_gradient_stops (context, &rpat->base); +} + +static cairo_status_t +_vg_setup_solid_source (cairo_vg_context_t *context, + const cairo_solid_pattern_t *spat) +{ + VGfloat color[] = { + spat->color.red, + spat->color.green, + spat->color.blue, + spat->color.alpha * context->alpha + }; + + vgSetParameteri (context->paint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR); + vgSetParameterfv (context->paint, VG_PAINT_COLOR, 4, color); + + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; +} + +static cairo_vg_surface_t * +_vg_clone_recording_surface (cairo_vg_context_t *context, + cairo_surface_t *surface) +{ + VGImage vg_image; + VGImageFormat format; + cairo_status_t status; + cairo_rectangle_int_t extents; + cairo_vg_surface_t *clone; + + status = _cairo_surface_get_extents (surface, &extents); + if (status) + return NULL; + + if (extents.width > vgGeti (VG_MAX_IMAGE_WIDTH) || + extents.height > vgGeti (VG_MAX_IMAGE_HEIGHT)) + { + return NULL; + } + + format = _vg_format_for_content (surface->content); + + /* NONALIASED, FASTER, BETTER */ + vg_image = vgCreateImage (format, + extents.width, extents.height, + VG_IMAGE_QUALITY_FASTER); + clone = (cairo_vg_surface_t *) + _vg_surface_create_internal (context, vg_image, format, + extents.width, extents.height); + cairo_surface_set_device_offset (&clone->base, -extents.x, -extents.y); + + status = _cairo_recording_surface_replay (surface, &clone->base); + if (unlikely (status)) { + cairo_surface_destroy (&clone->base); + return (cairo_vg_surface_t *) _cairo_surface_create_in_error (status); + } + + return clone; +} + +static cairo_vg_surface_t * +_vg_clone_image_surface (cairo_vg_context_t *context, + cairo_surface_t *surface) +{ + cairo_image_surface_t *image; + void *image_extra; + cairo_status_t status; + VGImage vg_image; + VGImageFormat format; + cairo_rectangle_int_t extents; + cairo_vg_surface_t *clone; + + if (surface->backend->acquire_source_image == NULL) + return NULL; + + status = _cairo_surface_get_extents (surface, &extents); + if (status) + return NULL; + + if (extents.width > vgGeti (VG_MAX_IMAGE_WIDTH) || + extents.height > vgGeti (VG_MAX_IMAGE_HEIGHT)) + { + return NULL; + } + + status = _cairo_surface_acquire_source_image (surface, + &image, &image_extra); + if (unlikely (status)) + return (cairo_vg_surface_t *) _cairo_surface_create_in_error (status); + + format = _vg_format_from_pixman (image->pixman_format); + if (format == 0) + format = _vg_format_for_content (image->base.content); + + /* NONALIASED, FASTER, BETTER */ + vg_image = vgCreateImage (format, + image->width, image->height, + VG_IMAGE_QUALITY_FASTER); + clone = (cairo_vg_surface_t *) + _vg_surface_create_internal (context, vg_image, format, + image->width, image->height); + if (unlikely (clone->base.status)) + return clone; + + vgImageSubData (clone->image, + image->data, image->stride, + format, 0, 0, image->width, image->height); + + _cairo_surface_release_source_image (surface, image, image_extra); + + return clone; +} + +static void +_vg_surface_remove_from_cache (cairo_surface_t *abstract_surface) +{ + cairo_vg_surface_t *surface = (cairo_vg_surface_t *) abstract_surface; + + if (surface->snapshot_cache_entry.hash) { + cairo_vg_context_t *context; + + context = _vg_context_lock (surface->context); + _cairo_cache_remove (&context->snapshot_cache, + &surface->snapshot_cache_entry); + _vg_context_unlock (context); + + surface->snapshot_cache_entry.hash = 0; + } +} + +static cairo_status_t +_vg_setup_surface_source (cairo_vg_context_t *context, + const cairo_surface_pattern_t *spat) +{ + cairo_surface_t *snapshot; + cairo_vg_surface_t *clone; + cairo_status_t status; + + snapshot = _cairo_surface_has_snapshot (spat->surface, + &cairo_vg_surface_backend); + if (snapshot != NULL) { + clone = (cairo_vg_surface_t *) cairo_surface_reference (snapshot); + goto DONE; + } + + if (_cairo_surface_is_recording (spat->surface)) + clone = _vg_clone_recording_surface (context, spat->surface); + else + clone = _vg_clone_image_surface (context, spat->surface); + if (clone == NULL) + return CAIRO_INT_STATUS_UNSUPPORTED; + if (unlikely (clone->base.status)) + return clone->base.status; + + clone->snapshot_cache_entry.hash = clone->base.unique_id; + status = _cairo_cache_insert (&context->snapshot_cache, + &clone->snapshot_cache_entry); + if (unlikely (status)) { + clone->snapshot_cache_entry.hash = 0; + cairo_surface_destroy (&clone->base); + return status; + } + + _cairo_surface_attach_snapshot (spat->surface, &clone->base, + _vg_surface_remove_from_cache); + +DONE: + cairo_surface_destroy (&context->source->base); + context->source = clone; + + vgSetParameteri (context->paint, VG_PAINT_TYPE, VG_PAINT_TYPE_PATTERN); + + switch (spat->base.extend) { + case CAIRO_EXTEND_PAD: + vgSetParameteri (context->paint, + VG_PAINT_PATTERN_TILING_MODE, + VG_TILE_PAD); + break; + + case CAIRO_EXTEND_NONE: + vgSetParameteri (context->paint, + VG_PAINT_PATTERN_TILING_MODE, + VG_TILE_FILL); + { + VGfloat color[] = {0,0,0,0}; + vgSetfv (VG_TILE_FILL_COLOR, 4, color); + } + break; + + case CAIRO_EXTEND_REPEAT: + vgSetParameteri (context->paint, + VG_PAINT_PATTERN_TILING_MODE, + VG_TILE_REPEAT); + break; + + default: + ASSERT_NOT_REACHED; + case CAIRO_EXTEND_REFLECT: + vgSetParameteri (context->paint, + VG_PAINT_PATTERN_TILING_MODE, + VG_TILE_REFLECT); + break; + } + vgPaintPattern (context->paint, context->source->image); + + _vg_set_source_matrix (&spat->base); + + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +setup_source (cairo_vg_context_t *context, + const cairo_pattern_t *source) +{ + switch (source->type) { + case CAIRO_PATTERN_TYPE_SOLID: + return _vg_setup_solid_source (context, + (cairo_solid_pattern_t *) source); + case CAIRO_PATTERN_TYPE_LINEAR: + return _vg_setup_linear_source (context, + (cairo_linear_pattern_t *) source); + case CAIRO_PATTERN_TYPE_RADIAL: + return _vg_setup_radial_source (context, + (cairo_radial_pattern_t *) source); + case CAIRO_PATTERN_TYPE_SURFACE: + return _vg_setup_surface_source (context, + (cairo_surface_pattern_t *) source); + default: + ASSERT_NOT_REACHED; + return CAIRO_INT_STATUS_UNSUPPORTED; + } +} + +static cairo_int_status_t +_vg_surface_stroke (void *abstract_surface, + cairo_operator_t op, + const cairo_pattern_t *source, + const cairo_path_fixed_t *path, + const cairo_stroke_style_t *style, + const cairo_matrix_t *ctm, + const cairo_matrix_t *ctm_inverse, + double tolerance, + cairo_antialias_t antialias, + const cairo_clip_t *clip) +{ + cairo_vg_surface_t *surface = abstract_surface; + cairo_vg_context_t *context; + cairo_status_t status; + VGfloat state[9]; + VGfloat strokeTransform[9]; + vg_path_t vg_path; + + if (! _vg_is_supported_operator (op)) + return CAIRO_INT_STATUS_UNSUPPORTED; + + context = _vg_context_lock (surface->context); + status = _vg_context_set_target (context, surface); + if (status) { + _vg_context_unlock (context); + return status; + } + + status = setup_source (context, source); + if (status) { + _vg_context_unlock (context); + return status; + } + + status = _cairo_surface_clipper_set_clip (&surface->clipper, clip); + if (unlikely (status)) { + _vg_context_unlock (context); + return status; + } + + vg_path.path = vgCreatePath (VG_PATH_FORMAT_STANDARD, + VG_PATH_DATATYPE_F, + 1, 0, 0, 0, + VG_PATH_CAPABILITY_ALL); + + vgGetMatrix (state); + _vg_matrix_from_cairo (strokeTransform, ctm); + vgMultMatrix (strokeTransform); + + vg_path.ctm_inverse = ctm_inverse; + + _vg_path_from_cairo (&vg_path, path); + + /* XXX DASH_PATTERN, DASH_PHASE */ + vgSetf (VG_STROKE_LINE_WIDTH, style->line_width); + vgSetf (VG_STROKE_MITER_LIMIT, style->miter_limit); + vgSetf (VG_STROKE_JOIN_STYLE, _vg_line_join_from_cairo (style->line_join)); + vgSetf (VG_STROKE_CAP_STYLE, _vg_line_cap_from_cairo (style->line_cap)); + + vgSeti (VG_BLEND_MODE, _vg_operator (op)); + + vgSetPaint (context->paint, VG_STROKE_PATH); + + vgDrawPath (vg_path.path, VG_STROKE_PATH); + + vgDestroyPath (vg_path.path); + + vgLoadMatrix (state); + + CHECK_VG_ERRORS(); + _vg_context_unlock (context); + + return CAIRO_STATUS_SUCCESS; +} + +static cairo_int_status_t +_vg_surface_fill (void *abstract_surface, + cairo_operator_t op, + const cairo_pattern_t *source, + const cairo_path_fixed_t *path, + cairo_fill_rule_t fill_rule, + double tolerance, + cairo_antialias_t antialias, + const cairo_clip_t *clip) +{ + cairo_vg_surface_t *surface = abstract_surface; + cairo_vg_context_t *context; + cairo_status_t status; + vg_path_t vg_path; + + if (op == CAIRO_OPERATOR_DEST) + return CAIRO_STATUS_SUCCESS; + + if (! _vg_is_supported_operator (op)) + return CAIRO_INT_STATUS_UNSUPPORTED; + + context = _vg_context_lock (surface->context); + status = _vg_context_set_target (context, surface); + if (status) { + _vg_context_unlock (context); + return status; + } + + status = setup_source (context, source); + if (status) { + _vg_context_unlock (context); + return status; + } + + status = _cairo_surface_clipper_set_clip (&surface->clipper, clip); + if (unlikely (status)) { + _vg_context_unlock (context); + return status; + } + + vg_path.path = vgCreatePath (VG_PATH_FORMAT_STANDARD, + VG_PATH_DATATYPE_F, + 1, 0, + 0, 0, + VG_PATH_CAPABILITY_ALL); + vg_path.ctm_inverse = NULL; + + _vg_path_from_cairo (&vg_path, path); + + /* XXX tolerance */ + + vgSeti (VG_BLEND_MODE, _vg_operator (op)); + vgSetf (VG_FILL_RULE, _vg_fill_rule_from_cairo (fill_rule)); + vgSetf (VG_RENDERING_QUALITY, _vg_rendering_quality_from_cairo (antialias)); + + vgSetPaint (context->paint, VG_FILL_PATH); + + vgDrawPath (vg_path.path, VG_FILL_PATH); + + vgDestroyPath (vg_path.path); + + _vg_context_unlock (context); + + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; +} + +static cairo_int_status_t +_vg_surface_paint (void *abstract_surface, + cairo_operator_t op, + const cairo_pattern_t *source, + const cairo_clip_t *clip) +{ + cairo_vg_surface_t *surface = abstract_surface; + cairo_vg_context_t *context; + cairo_status_t status; + + if (op == CAIRO_OPERATOR_DEST) + return CAIRO_STATUS_SUCCESS; + + if (! _vg_is_supported_operator (op)) + return CAIRO_INT_STATUS_UNSUPPORTED; + + context = _vg_context_lock (surface->context); + status = _vg_context_set_target (context, surface); + if (status) { + _vg_context_unlock (context); + return status; + } + + status = setup_source (context, source); + if (status) { + _vg_context_unlock (context); + return status; + } + + status = _cairo_surface_clipper_set_clip (&surface->clipper, clip); + if (unlikely (status)) { + _vg_context_unlock (context); + return status; + } + + vgSeti (VG_BLEND_MODE, _vg_operator (op)); + vgSetPaint (context->paint, VG_FILL_PATH); + + { /* creating a rectangular path that should cover the extent */ + VGubyte segs[] = { + VG_MOVE_TO_ABS, VG_LINE_TO_ABS, + VG_LINE_TO_ABS, VG_LINE_TO_ABS, + VG_CLOSE_PATH + }; + VGfloat data[] = { + 0, 0, + surface->width, 0, + surface->width, surface->height, + 0, surface->height + }; + VGPath fullext; + + fullext = vgCreatePath (VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F, + 1,0,0,0, VG_PATH_CAPABILITY_ALL); + vgAppendPathData (fullext, sizeof(segs), segs, data); + + vgDrawPath (fullext, VG_FILL_PATH); + + vgDestroyPath (fullext); + } + + _vg_context_unlock (context); + + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; +} + +static cairo_int_status_t +_vg_surface_mask (void *abstract_surface, + cairo_operator_t op, + const cairo_pattern_t *source, + const cairo_pattern_t *mask, + const cairo_clip_t *clip) +{ + cairo_vg_surface_t *surface = abstract_surface; + cairo_status_t status; + + if (! _vg_is_supported_operator (op)) + return CAIRO_INT_STATUS_UNSUPPORTED; + + /* Handle paint-with-alpha to do fades cheaply */ + if (mask->type == CAIRO_PATTERN_TYPE_SOLID) { + cairo_solid_pattern_t *solid = (cairo_solid_pattern_t *) mask; + cairo_vg_context_t *context = _vg_context_lock (surface->context); + double alpha = context->alpha; + + context->alpha = solid->color.alpha; + status = _vg_surface_paint (abstract_surface, op, source, clip); + context->alpha = alpha; + + _vg_context_unlock (context); + + return status; + } + + return CAIRO_INT_STATUS_UNSUPPORTED; +} + +static void +_vg_surface_get_font_options (void *abstract_surface, + cairo_font_options_t *options) +{ + _cairo_font_options_init_default (options); + + cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_ON); + _cairo_font_options_set_round_glyph_positions (options, CAIRO_ROUND_GLYPH_POS_OFF); +} + +static cairo_int_status_t +_vg_surface_show_glyphs (void *abstract_surface, + cairo_operator_t op, + const cairo_pattern_t *source, + cairo_glyph_t *glyphs, + int num_glyphs, + cairo_scaled_font_t *scaled_font, + const cairo_clip_t *clip) +{ + cairo_status_t status = CAIRO_STATUS_SUCCESS; + cairo_path_fixed_t path; + + if (num_glyphs <= 0) + return CAIRO_STATUS_SUCCESS; + + _cairo_path_fixed_init (&path); + + /* XXX Glyph cache! OpenVG font support in 1.1? */ + + status = _cairo_scaled_font_glyph_path (scaled_font, + glyphs, num_glyphs, + &path); + if (unlikely (status)) + goto BAIL; + + status = _vg_surface_fill (abstract_surface, + op, source, &path, + CAIRO_FILL_RULE_WINDING, + CAIRO_GSTATE_TOLERANCE_DEFAULT, + CAIRO_ANTIALIAS_DEFAULT, + clip); +BAIL: + _cairo_path_fixed_fini (&path); + return status; +} + +static inline int +multiply_alpha (int alpha, int color) +{ + int temp = alpha * color + 0x80; + return (temp + (temp >> 8)) >> 8; +} + +static void +premultiply_argb (uint8_t *data, + int width, + int height, + int stride) +{ + int i; + + while (height --) { + uint32_t *row = (uint32_t *) data; + + for (i = 0; i < width; i++) { + uint32_t p = row[i]; + uint8_t alpha; + + alpha = p >> 24; + if (alpha == 0) { + row[i] = 0; + } else if (alpha != 0xff) { + uint8_t r = multiply_alpha (alpha, (p >> 16) & 0xff); + uint8_t g = multiply_alpha (alpha, (p >> 8) & 0xff); + uint8_t b = multiply_alpha (alpha, (p >> 0) & 0xff); + row[i] = (alpha << 24) | (r << 16) | (g << 8) | (b << 0); + } + } + + data += stride; + } +} + +static cairo_int_status_t +_vg_get_image (cairo_vg_surface_t *surface, + int x, int y, + int width, int height, + cairo_image_surface_t **image_out) +{ + cairo_image_surface_t *image; + pixman_image_t *pixman_image; + pixman_format_code_t pixman_format; + cairo_bool_t needs_premultiply; + + pixman_format = _vg_format_to_pixman (surface->format, + &needs_premultiply); + if (pixman_format == 0) + return CAIRO_INT_STATUS_UNSUPPORTED; + + pixman_image = pixman_image_create_bits (pixman_format, + width, height, + NULL, 0); + if (unlikely (pixman_image == NULL)) + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + + vgFinish (); + CHECK_VG_ERRORS(); + + vgGetImageSubData (surface->image, + pixman_image_get_data (pixman_image), + pixman_image_get_stride (pixman_image), + surface->format, + x, y, width, height); + + image = (cairo_image_surface_t *) + _cairo_image_surface_create_for_pixman_image (pixman_image, + pixman_format); + if (unlikely (image->base.status)) { + pixman_image_unref (pixman_image); + return image->base.status; + } + + if (needs_premultiply) + premultiply_argb (image->data, width, height, image->stride); + + *image_out = image; + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +_vg_surface_acquire_source_image (void *abstract_surface, + cairo_image_surface_t **image_out, + void **image_extra) +{ + cairo_vg_surface_t *surface = abstract_surface; + + CHECK_VG_ERRORS(); + *image_extra = NULL; + return _vg_get_image (surface, + 0, 0, surface->width, surface->height, + image_out); +} + +static void +_vg_surface_release_source_image (void *abstract_surface, + cairo_image_surface_t *image, + void *image_extra) +{ + cairo_surface_destroy (&image->base); +} + +static cairo_status_t +_vg_surface_finish (void *abstract_surface) +{ + cairo_vg_surface_t *surface = abstract_surface; + cairo_vg_context_t *context = _vg_context_lock (surface->context); + + if (surface->snapshot_cache_entry.hash) { + _cairo_cache_remove (&context->snapshot_cache, + &surface->snapshot_cache_entry); + + surface->snapshot_cache_entry.hash = 0; + } + + _cairo_surface_clipper_reset (&surface->clipper); + + if (surface->own_image) + vgDestroyImage (surface->image); + + _vg_context_destroy_target (context, surface); + + _vg_context_unlock (context); + _vg_context_destroy (context); + + CHECK_VG_ERRORS(); + return CAIRO_STATUS_SUCCESS; +} + +static const cairo_surface_backend_t cairo_vg_surface_backend = { + CAIRO_SURFACE_TYPE_VG, + _vg_surface_finish, + + _cairo_default_context_create, /* XXX */ + + _vg_surface_create_similar, + NULL, /* create similar image */ + NULL, /* map to image */ + NULL, /* unmap image */ + + _cairo_surface_default_source, + _vg_surface_acquire_source_image, + _vg_surface_release_source_image, + NULL, /* snapshot */ + + NULL, /* copy_page */ + NULL, /* show_page */ + + _vg_surface_get_extents, + _vg_surface_get_font_options, /* get_font_options */ + + NULL, /* flush */ + NULL, /* mark dirty */ + + _vg_surface_paint, + _vg_surface_mask, + _vg_surface_stroke, + _vg_surface_fill, + NULL, /* fill-stroke */ + _vg_surface_show_glyphs, +}; + +static cairo_surface_t * +_vg_surface_create_internal (cairo_vg_context_t *context, + VGImage image, + VGImageFormat format, + int width, int height) +{ + cairo_vg_surface_t *surface; + + surface = _cairo_malloc (sizeof (cairo_vg_surface_t)); + if (unlikely (surface == NULL)) + return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY)); + + surface->context = _vg_context_reference (context); + + surface->image = image; + surface->format = format; + + _cairo_surface_init (&surface->base, + &cairo_vg_surface_backend, + NULL, /* device */ + _vg_format_to_content (format), + FALSE); /* is_vector */ + + surface->width = width; + surface->height = height; + + _cairo_surface_clipper_init (&surface->clipper, + _vg_surface_clipper_intersect_clip_path); + + surface->snapshot_cache_entry.hash = 0; + + surface->target_id = 0; + + CHECK_VG_ERRORS(); + return &surface->base; +} + +cairo_surface_t * +cairo_vg_surface_create_for_image (cairo_vg_context_t *context, + VGImage image, + VGImageFormat format, + int width, int height) +{ + cairo_bool_t premult; + + if (context->status) + return _cairo_surface_create_in_error (context->status); + + if (image == VG_INVALID_HANDLE) + return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY)); + if (_vg_format_to_pixman (format, &premult) == 0) + return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_FORMAT)); + + return _vg_surface_create_internal (context, image, format, width, height); +} + +cairo_surface_t * +cairo_vg_surface_create (cairo_vg_context_t *context, + cairo_content_t content, + int width, + int height) +{ + VGImage image; + VGImageFormat format; + cairo_surface_t *surface; + + if (context->status) + return _cairo_surface_create_in_error (context->status); + + if (! CAIRO_CONTENT_VALID (content)) + return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_CONTENT)); + + if (width > vgGeti (VG_MAX_IMAGE_WIDTH) || + height > vgGeti (VG_MAX_IMAGE_HEIGHT)) + { + return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE)); + } + + + format = _vg_format_for_content (content); + image = vgCreateImage (format, width, height, VG_IMAGE_QUALITY_BETTER); + if (image == VG_INVALID_HANDLE) + return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY)); + + surface = _vg_surface_create_internal (context, + image, format, width, height); + if (unlikely (surface->status)) + return surface; + + ((cairo_vg_surface_t *) surface)->own_image = TRUE; + return surface; +} +slim_hidden_def (cairo_vg_surface_create); + +VGImage +cairo_vg_surface_get_image (cairo_surface_t *abstract_surface) +{ + cairo_vg_surface_t *surface; + + if (abstract_surface->backend != &cairo_vg_surface_backend) { + _cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); + return VG_INVALID_HANDLE; + } + + surface = (cairo_vg_surface_t *) abstract_surface; + return surface->image; +} + +int +cairo_vg_surface_get_width (cairo_surface_t *abstract_surface) +{ + cairo_vg_surface_t *surface; + + if (abstract_surface->backend != &cairo_vg_surface_backend) { + _cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); + return 0; + } + + surface = (cairo_vg_surface_t *) abstract_surface; + return surface->width; +} + +int +cairo_vg_surface_get_height (cairo_surface_t *abstract_surface) +{ + cairo_vg_surface_t *surface; + + if (abstract_surface->backend != &cairo_vg_surface_backend) { + _cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); + return 0; + } + + surface = (cairo_vg_surface_t *) abstract_surface; + return surface->height; +} + +VGImageFormat +cairo_vg_surface_get_format (cairo_surface_t *abstract_surface) +{ + cairo_vg_surface_t *surface; + + if (abstract_surface->backend != &cairo_vg_surface_backend) { + _cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); + return 0; + } + + surface = (cairo_vg_surface_t *) abstract_surface; + return surface->format; +} + +/* GL specific context support :-( + * + * OpenVG like cairo defers creation of surface (and the necessary + * paraphernalia to the application. + */ + +static const cairo_vg_context_t _vg_context_nil = { + CAIRO_STATUS_NO_MEMORY, + CAIRO_REFERENCE_COUNT_INVALID +}; + +static const cairo_vg_context_t _vg_context_nil_invalid_visual = { + CAIRO_STATUS_INVALID_VISUAL, + CAIRO_REFERENCE_COUNT_INVALID +}; + +#if CAIRO_HAS_GLX_FUNCTIONS +#include <GL/glx.h> + +static cairo_status_t +glx_create_target (cairo_vg_context_t *context, + cairo_vg_surface_t *surface) +{ + /* XXX hmm, magic required for creating an FBO points to VGImage! */ + return CAIRO_INT_STATUS_UNSUPPORTED; +} + +static cairo_status_t +glx_set_target (cairo_vg_context_t *context, + cairo_vg_surface_t *surface) +{ +#if 0 + glXMakeContextCurrent (context->display, + (GLXDrawable) surface->target_id, + (GLXDrawable) surface->target_id, + context->context); +#else + return CAIRO_INT_STATUS_UNSUPPORTED; +#endif +} + +static void +glx_destroy_target (cairo_vg_context_t *context, + cairo_vg_surface_t *surface) +{ +} + +cairo_vg_context_t * +cairo_vg_context_create_for_glx (Display *dpy, GLXContext ctx) +{ + cairo_vg_context_t *context; + cairo_status_t status; + + context = _cairo_malloc (sizeof (*context)); + if (unlikely (context == NULL)) + return (cairo_vg_context_t *) &_vg_context_nil; + + context->display = dpy; + context->context = ctx; + + context->create_target = glx_create_target; + context->set_target = glx_set_target; + context->destroy_target = glx_destroy_target; + + status = _vg_context_init (context); + if (unlikely (status)) { + free (context); + return (cairo_vg_context_t *) &_vg_context_nil; + } + + return context; +} +#endif + +#if CAIRO_HAS_EGL_FUNCTIONS +static cairo_status_t +egl_create_target (cairo_vg_context_t *context, + cairo_vg_surface_t *surface) +{ + EGLSurface *egl_surface; +#define RED 1 +#define GREEN 3 +#define BLUE 5 +#define ALPHA 7 + int attribs[] = { + EGL_RED_SIZE, 0, + EGL_GREEN_SIZE, 0, + EGL_BLUE_SIZE, 0, + EGL_ALPHA_SIZE, 0, + EGL_SURFACE_TYPE, EGL_PBUFFER_BIT, + EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT, + EGL_NONE + }; + pixman_format_code_t pixman_format; + EGLConfig config; + int num_configs = 0; + cairo_bool_t needs_premultiply; + + pixman_format = _vg_format_to_pixman (surface->format, &needs_premultiply); + if (pixman_format == 0) + return CAIRO_INT_STATUS_UNSUPPORTED; + + /* XXX no control over pixel ordering! */ + attribs[RED] = PIXMAN_FORMAT_R (pixman_format); + attribs[GREEN] = PIXMAN_FORMAT_G (pixman_format); + attribs[BLUE] = PIXMAN_FORMAT_B (pixman_format); + attribs[ALPHA] = PIXMAN_FORMAT_A (pixman_format); + + if (! eglChooseConfig (context->display, + attribs, + &config, 1, &num_configs) || + num_configs != 1) + { + fprintf(stderr, "Error: eglChooseConfig() failed.\n"); + return CAIRO_INT_STATUS_UNSUPPORTED; + } + + egl_surface = + eglCreatePbufferFromClientBuffer (context->display, + EGL_OPENVG_IMAGE, + (EGLClientBuffer) surface->image, + config, + NULL); + surface->target_id = (unsigned long) egl_surface; + + return CAIRO_STATUS_SUCCESS; +} + +static cairo_status_t +egl_set_target (cairo_vg_context_t *context, + cairo_vg_surface_t *surface) +{ + if (! eglMakeCurrent (context->display, + (EGLSurface *) surface->target_id, + (EGLSurface *) surface->target_id, + context->context)) + { + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + } + + return CAIRO_STATUS_SUCCESS; +} + +static void +egl_destroy_target (cairo_vg_context_t *context, + cairo_vg_surface_t *surface) +{ + eglDestroySurface (context->display, + (EGLSurface *) surface->target_id); +} + +cairo_vg_context_t * +cairo_vg_context_create_for_egl (EGLDisplay egl_display, + EGLContext egl_context) +{ + cairo_vg_context_t *context; + cairo_status_t status; + + context = _cairo_malloc (sizeof (*context)); + if (unlikely (context == NULL)) + return (cairo_vg_context_t *) &_vg_context_nil; + + status = _vg_context_init (context); + if (unlikely (status)) { + free (context); + return (cairo_vg_context_t *) &_vg_context_nil; + } + + context->display = egl_display; + context->context = egl_context; + + context->create_target = egl_create_target; + context->set_target = egl_set_target; + context->destroy_target = egl_destroy_target; + + return context; +} +#endif + +cairo_status_t +cairo_vg_context_status (cairo_vg_context_t *context) +{ + return context->status; +} + +void +cairo_vg_context_destroy (cairo_vg_context_t *context) +{ + if (context == NULL || CAIRO_REFERENCE_COUNT_IS_INVALID (&context->ref_count)) + return; + + _vg_context_destroy (context); +} |