/* -*- 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 * Øyvind Kolås * Vladimi Vukicevic (stubbed out base backend) * Chris Wilson */ #include "cairoint.h" #include "cairo-vg.h" #include "cairo-cache-private.h" #include "cairo-error-private.h" #include "cairo-path-fixed-private.h" #include "cairo-recording-surface-private.h" #include "cairo-surface-clipper-private.h" #include #include //#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 0; //PIXMAN_r8g8b8x8; case VG_sRGBA_8888: return 0; case VG_sRGBA_8888_PRE: return 0; //PIXMAN_r8b8g8a8; 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; 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, CAIRO_DIRECTION_FORWARD, _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: return VG_RENDERING_QUALITY_BETTER; case CAIRO_ANTIALIAS_GRAY: 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] = _cairo_fixed_to_double (lpat->p1.x); linear[1] = _cairo_fixed_to_double (lpat->p1.y); linear[2] = _cairo_fixed_to_double (lpat->p2.x); linear[3] = _cairo_fixed_to_double (lpat->p2.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] = _cairo_fixed_to_double (rpat->c1.x); radial[1] = _cairo_fixed_to_double (rpat->c1.y); radial[2] = _cairo_fixed_to_double (rpat->c2.x); radial[3] = _cairo_fixed_to_double (rpat->c2.y); radial[4] = _cairo_fixed_to_double (rpat->r2); 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, cairo_path_fixed_t *path, cairo_stroke_style_t *style, cairo_matrix_t *ctm, cairo_matrix_t *ctm_inverse, double tolerance, cairo_antialias_t antialias, 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, cairo_path_fixed_t *path, cairo_fill_rule_t fill_rule, double tolerance, cairo_antialias_t antialias, 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, 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, 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); } 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, cairo_clip_t *clip, int *remaining_glyphs) { 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_SUBPIXEL, 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_acquire_dest_image (void *abstract_surface, cairo_rectangle_int_t *interest_rect, cairo_image_surface_t **image_out, cairo_rectangle_int_t *image_rect_out, void **image_extra) { cairo_vg_surface_t *surface = abstract_surface; *image_rect_out = *interest_rect; *image_extra = NULL; return _vg_get_image (surface, interest_rect->x, interest_rect->y, interest_rect->width, interest_rect->height, image_out); } static void unpremultiply_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 = (((p >> 16) & 0xff) * 255 + alpha / 2) / alpha; uint8_t g = (((p >> 8) & 0xff) * 255 + alpha / 2) / alpha; uint8_t b = (((p >> 0) & 0xff) * 255 + alpha / 2) / alpha; row[i] = (alpha << 24) | (r << 16) | (g << 8) | (b << 0); } } data += stride; } } static void _vg_surface_release_dest_image (void *abstract_surface, cairo_rectangle_int_t *interest_rect, cairo_image_surface_t *image, cairo_rectangle_int_t *image_rect, void *image_extra) { cairo_vg_surface_t *surface = abstract_surface; cairo_bool_t needs_unpremultiply; _vg_format_to_pixman (surface->format, &needs_unpremultiply); if (needs_unpremultiply) { unpremultiply_argb (image->data, image->width, image->height, image->stride); } vgImageSubData (surface->image, image->data, image->stride, surface->format, image_rect->x, image_rect->y, image_rect->width, image_rect->height); 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_create_similar, _vg_surface_finish, _vg_surface_acquire_source_image, _vg_surface_release_source_image, _vg_surface_acquire_dest_image, _vg_surface_release_dest_image, NULL, /* clone_similar */ NULL, /* composite */ NULL, /* fill_rectangles */ NULL, /* composite_trapezoids */ NULL, /* create_span_renderer */ NULL, /* check_span_renderer */ NULL, /* copy_page */ NULL, /* show_page */ _vg_surface_get_extents, NULL, /* old_show_glyphs */ _vg_surface_get_font_options, /* get_font_options */ NULL, /* flush */ NULL, /* mark_dirty_rectangle */ NULL, /* scaled_font_fini */ NULL, /* scaled_glyph_fini */ _vg_surface_paint, _vg_surface_mask, _vg_surface_stroke, _vg_surface_fill, _vg_surface_show_glyphs, NULL, /* snapshot */ NULL, /* is_similar */ }; 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 = 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)); 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 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 = 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 = 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); }