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cairo-cogl-surface.c
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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2011 Intel Corporation.
*
* 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):
* Robert Bragg <[email protected]>
*/
#include "cairoint.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 "cairo-fixed-private.h"
#include "cairo-device-private.h"
#include "cairo-composite-rectangles-private.h"
#include "cairo-image-surface-inline.h"
#include "cairo-cogl-private.h"
#include "cairo-cogl-gradient-private.h"
#include "cairo-arc-private.h"
#include "cairo-traps-private.h"
#include "cairo-cogl-context-private.h"
#include "cairo-cogl-utils-private.h"
#include "cairo-box-inline.h"
#include "cairo-surface-subsurface-inline.h"
#include "cairo-surface-fallback-private.h"
#include "cairo-surface-offset-private.h"
#include "cairo-cogl.h"
#include <cogl/cogl2-experimental.h>
#include <glib.h>
#define CAIRO_COGL_DEBUG 0
//#define FILL_WITH_COGL_PATH
//#define USE_CAIRO_PATH_FLATTENER
#define ENABLE_PATH_CACHE
//#define DISABLE_BATCHING
#define USE_COGL_RECTANGLE_API
#define ENABLE_RECTANGLES_FASTPATH
#if defined (USE_COGL_RECTANGLE_API) || defined (ENABLE_PATH_CACHE)
#define NEED_COGL_CONTEXT
#endif
#if CAIRO_COGL_DEBUG && __GNUC__
#define UNSUPPORTED(reason) ({ \
g_warning ("cairo-cogl: hit unsupported operation: %s", reason); \
CAIRO_INT_STATUS_UNSUPPORTED; \
})
#else
#define UNSUPPORTED(reason) CAIRO_INT_STATUS_UNSUPPORTED
#endif
#define CAIRO_COGL_PATH_META_CACHE_SIZE (1024 * 1024)
typedef struct _cairo_cogl_texture_attributes {
/* nabbed from cairo_surface_attributes_t... */
cairo_matrix_t matrix;
cairo_extend_t extend;
cairo_filter_t filter;
cairo_bool_t has_component_alpha;
CoglPipelineWrapMode s_wrap;
CoglPipelineWrapMode t_wrap;
} cairo_cogl_texture_attributes_t;
typedef enum _cairo_cogl_journal_entry_type {
CAIRO_COGL_JOURNAL_ENTRY_TYPE_RECTANGLE,
CAIRO_COGL_JOURNAL_ENTRY_TYPE_PRIMITIVE,
CAIRO_COGL_JOURNAL_ENTRY_TYPE_PATH,
CAIRO_COGL_JOURNAL_ENTRY_TYPE_CLIP
} cairo_cogl_journal_entry_type_t;
typedef struct _cairo_cogl_journal_entry {
cairo_cogl_journal_entry_type_t type;
} cairo_cogl_journal_entry_t;
typedef struct _cairo_cogl_journal_clip_entry {
cairo_cogl_journal_entry_t base;
cairo_clip_t *clip;
} cairo_cogl_journal_clip_entry_t;
typedef struct _cairo_cogl_journal_rect_entry {
cairo_cogl_journal_entry_t base;
CoglPipeline *pipeline;
float x;
float y;
float width;
float height;
int n_layers;
cairo_matrix_t ctm;
} cairo_cogl_journal_rect_entry_t;
typedef struct _cairo_cogl_journal_prim_entry {
cairo_cogl_journal_entry_t base;
CoglPipeline *pipeline;
CoglPrimitive *primitive;
gboolean has_transform;
cairo_matrix_t transform;
} cairo_cogl_journal_prim_entry_t;
typedef struct _cairo_cogl_journal_path_entry {
cairo_cogl_journal_entry_t base;
CoglPipeline *pipeline;
CoglPath *path;
} cairo_cogl_journal_path_entry_t;
typedef struct _cairo_cogl_path_fill_meta {
cairo_cache_entry_t cache_entry;
cairo_reference_count_t ref_count;
int counter;
cairo_path_fixed_t *user_path;
cairo_matrix_t ctm_inverse;
/* TODO */
#if 0
/* A cached path tessellation should be re-usable with different rotations
* and translations but not for different scales.
*
* one idea is to track the diagonal lenghts of a unit rectangle
* transformed through the original ctm use to tesselate the geometry
* so we can check what the lengths are for any new ctm to know if
* this geometry is compatible.
*/
#endif
CoglPrimitive *prim;
} cairo_cogl_path_fill_meta_t;
typedef struct _cairo_cogl_path_stroke_meta {
cairo_cache_entry_t cache_entry;
cairo_reference_count_t ref_count;
int counter;
cairo_path_fixed_t *user_path;
cairo_matrix_t ctm_inverse;
cairo_stroke_style_t style;
double tolerance;
/* TODO */
#if 0
/* A cached path tessellation should be re-usable with different rotations
* and translations but not for different scales.
*
* one idea is to track the diagonal lenghts of a unit rectangle
* transformed through the original ctm use to tesselate the geometry
* so we can check what the lengths are for any new ctm to know if
* this geometry is compatible.
*/
#endif
CoglPrimitive *prim;
} cairo_cogl_path_stroke_meta_t;
static cairo_surface_t *
_cairo_cogl_surface_create_full (cairo_cogl_device_t *dev,
cairo_bool_t ignore_alpha,
CoglFramebuffer *framebuffer,
CoglTexture *texture);
static cairo_int_status_t
_cairo_cogl_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);
static void
_cairo_cogl_journal_flush (cairo_cogl_surface_t *surface);
cairo_private extern const cairo_surface_backend_t _cairo_cogl_surface_backend;
slim_hidden_proto (cairo_cogl_device_create);
slim_hidden_proto (cairo_cogl_surface_create);
slim_hidden_proto (cairo_cogl_surface_get_framebuffer);
slim_hidden_proto (cairo_cogl_surface_get_texture);
slim_hidden_proto (cairo_cogl_surface_end_frame);
static cairo_cogl_device_t *
to_device (cairo_device_t *device)
{
return (cairo_cogl_device_t *)device;
}
/* moves trap points such that they become the actual corners of the trapezoid */
static void
_sanitize_trap (cairo_trapezoid_t *t)
{
cairo_trapezoid_t s = *t;
#define FIX(lr, tb, p) \
if (t->lr.p.y != t->tb) { \
t->lr.p.x = s.lr.p2.x + _cairo_fixed_mul_div_floor (s.lr.p1.x - s.lr.p2.x, s.tb - s.lr.p2.y, s.lr.p1.y - s.lr.p2.y); \
t->lr.p.y = s.tb; \
}
FIX (left, top, p1);
FIX (left, bottom, p2);
FIX (right, top, p1);
FIX (right, bottom, p2);
}
static cairo_status_t
_cairo_cogl_surface_ensure_framebuffer (cairo_cogl_surface_t *surface)
{
GError *error = NULL;
if (surface->framebuffer)
return CAIRO_STATUS_SUCCESS;
surface->framebuffer = COGL_FRAMEBUFFER (cogl_offscreen_new_to_texture (surface->texture));
if (!cogl_framebuffer_allocate (surface->framebuffer, &error)) {
g_error_free (error);
cogl_object_unref (surface->framebuffer);
surface->framebuffer = NULL;
return CAIRO_STATUS_NO_MEMORY;
}
cogl_push_framebuffer (surface->framebuffer);
cogl_ortho (0, surface->width,
surface->height, 0,
-1, 100);
cogl_pop_framebuffer ();
return CAIRO_STATUS_SUCCESS;
}
static cairo_surface_t *
_cairo_cogl_surface_create_similar (void *abstract_surface,
cairo_content_t content,
int width,
int height)
{
cairo_cogl_surface_t *reference_surface = abstract_surface;
cairo_cogl_surface_t *surface;
CoglTexture *texture;
cairo_status_t status;
texture = cogl_texture_new_with_size (width, height,
COGL_TEXTURE_NO_SLICING,
(content & CAIRO_CONTENT_COLOR) ?
COGL_PIXEL_FORMAT_BGRA_8888_PRE :
COGL_PIXEL_FORMAT_A_8);
if (!texture)
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
surface = (cairo_cogl_surface_t *)
_cairo_cogl_surface_create_full (to_device(reference_surface->base.device),
(content & CAIRO_CONTENT_ALPHA) == 0,
NULL,
texture);
if (unlikely (surface->base.status))
return &surface->base;
status = _cairo_cogl_surface_ensure_framebuffer (surface);
if (unlikely (status)) {
cairo_surface_destroy (&surface->base);
return _cairo_surface_create_in_error (status);
}
return &surface->base;
}
static cairo_bool_t
_cairo_cogl_surface_get_extents (void *abstract_surface,
cairo_rectangle_int_t *extents)
{
cairo_cogl_surface_t *surface = abstract_surface;
extents->x = 0;
extents->y = 0;
extents->width = surface->width;
extents->height = surface->height;
return TRUE;
}
static void
_cairo_cogl_journal_free (cairo_cogl_surface_t *surface)
{
GList *l;
for (l = surface->journal->head; l; l = l->next) {
cairo_cogl_journal_entry_t *entry = l->data;
if (entry->type == CAIRO_COGL_JOURNAL_ENTRY_TYPE_PRIMITIVE) {
cairo_cogl_journal_prim_entry_t *prim_entry =
(cairo_cogl_journal_prim_entry_t *)entry;
cogl_object_unref (prim_entry->primitive);
} else if (entry->type == CAIRO_COGL_JOURNAL_ENTRY_TYPE_PATH) {
cairo_cogl_journal_path_entry_t *path_entry =
(cairo_cogl_journal_path_entry_t *)entry;
cogl_object_unref (path_entry->path);
}
}
g_queue_free (surface->journal);
surface->journal = NULL;
}
#ifdef FILL_WITH_COGL_PATH
static void
_cairo_cogl_journal_log_path (cairo_cogl_surface_t *surface,
CoglPipeline *pipeline,
CoglPath *path)
{
cairo_cogl_journal_path_entry_t *entry;
if (unlikely (surface->journal == NULL))
surface->journal = g_queue_new ();
/* FIXME: Instead of a GList here we should stack allocate the journal
* entries so it would be cheaper to allocate and they can all be freed in
* one go after flushing! */
entry = g_slice_new (cairo_cogl_journal_path_entry_t);
entry->base.type = CAIRO_COGL_JOURNAL_ENTRY_TYPE_PATH;
entry->pipeline = cogl_object_ref (pipeline);
entry->path = cogl_object_ref (path);
g_queue_push_tail (surface->journal, entry);
#ifdef DISABLE_BATCHING
_cairo_cogl_journal_flush (surface);
#endif
}
#endif /* FILL_WITH_COGL_PATH */
static void
_cairo_cogl_journal_log_primitive (cairo_cogl_surface_t *surface,
CoglPipeline *pipeline,
CoglPrimitive *primitive,
cairo_matrix_t *transform)
{
cairo_cogl_journal_prim_entry_t *entry;
if (unlikely (surface->journal == NULL))
surface->journal = g_queue_new ();
/* FIXME: Instead of a GList here we should stack allocate the journal
* entries so it would be cheaper to allocate and they can all be freed in
* one go after flushing! */
entry = g_slice_new (cairo_cogl_journal_prim_entry_t);
entry->base.type = CAIRO_COGL_JOURNAL_ENTRY_TYPE_PRIMITIVE;
entry->pipeline = cogl_object_ref (pipeline);
if (transform) {
entry->transform = *transform;
entry->has_transform = TRUE;
} else
entry->has_transform = FALSE;
entry->primitive = cogl_object_ref (primitive);
g_queue_push_tail (surface->journal, entry);
#ifdef DISABLE_BATCHING
_cairo_cogl_journal_flush (surface);
#endif
}
static void
_cairo_cogl_journal_log_rectangle (cairo_cogl_surface_t *surface,
CoglPipeline *pipeline,
float x,
float y,
float width,
float height,
int n_layers,
cairo_matrix_t *ctm)
{
cairo_cogl_journal_rect_entry_t *entry;
if (unlikely (surface->journal == NULL))
surface->journal = g_queue_new ();
/* FIXME: Instead of a GList here we should stack allocate the journal
* entries so it would be cheaper to allocate and they can all be freed in
* one go after flushing! */
entry = g_slice_new (cairo_cogl_journal_rect_entry_t);
entry->base.type = CAIRO_COGL_JOURNAL_ENTRY_TYPE_RECTANGLE;
entry->pipeline = cogl_object_ref (pipeline);
entry->x = x;
entry->y = y;
entry->width = width;
entry->height = height;
entry->ctm = *ctm;
entry->n_layers = n_layers;
g_queue_push_tail (surface->journal, entry);
#ifdef DISABLE_BATCHING
_cairo_cogl_journal_flush (surface);
#endif
}
static void
_cairo_cogl_journal_log_clip (cairo_cogl_surface_t *surface,
const cairo_clip_t *clip)
{
cairo_cogl_journal_clip_entry_t *entry;
if (unlikely (surface->journal == NULL))
surface->journal = g_queue_new ();
/* FIXME: Instead of a GList here we should stack allocate the journal
* entries so it would be cheaper to allocate and they can all be freed in
* one go after flushing! */
entry = g_slice_new (cairo_cogl_journal_clip_entry_t);
entry->base.type = CAIRO_COGL_JOURNAL_ENTRY_TYPE_CLIP;
entry->clip = _cairo_clip_copy (clip);
g_queue_push_tail (surface->journal, entry);
}
static void
_cairo_cogl_journal_discard (cairo_cogl_surface_t *surface)
{
GList *l;
if (!surface->journal) {
assert (surface->last_clip == NULL);
return;
}
if (surface->buffer_stack && surface->buffer_stack_offset) {
cogl_buffer_unmap (COGL_BUFFER (surface->buffer_stack));
cogl_object_unref (surface->buffer_stack);
surface->buffer_stack = NULL;
}
for (l = surface->journal->head; l; l = l->next) {
cairo_cogl_journal_entry_t *entry = l->data;
gsize entry_size;
switch (entry->type)
{
case CAIRO_COGL_JOURNAL_ENTRY_TYPE_CLIP: {
cairo_cogl_journal_clip_entry_t *clip_entry =
(cairo_cogl_journal_clip_entry_t *)entry;
_cairo_clip_destroy (clip_entry->clip);
entry_size = sizeof (cairo_cogl_journal_clip_entry_t);
break;
}
case CAIRO_COGL_JOURNAL_ENTRY_TYPE_RECTANGLE: {
cairo_cogl_journal_rect_entry_t *rect_entry =
(cairo_cogl_journal_rect_entry_t *)entry;
cogl_object_unref (rect_entry->pipeline);
entry_size = sizeof (cairo_cogl_journal_rect_entry_t);
break;
}
case CAIRO_COGL_JOURNAL_ENTRY_TYPE_PRIMITIVE: {
cairo_cogl_journal_prim_entry_t *prim_entry =
(cairo_cogl_journal_prim_entry_t *)entry;
cogl_object_unref (prim_entry->pipeline);
cogl_object_unref (prim_entry->primitive);
entry_size = sizeof (cairo_cogl_journal_prim_entry_t);
break;
}
case CAIRO_COGL_JOURNAL_ENTRY_TYPE_PATH: {
cairo_cogl_journal_path_entry_t *path_entry =
(cairo_cogl_journal_path_entry_t *)entry;
cogl_object_unref (path_entry->pipeline);
cogl_object_unref (path_entry->path);
entry_size = sizeof (cairo_cogl_journal_path_entry_t);
break;
}
default:
assert (0); /* not reached! */
entry_size = 0; /* avoid compiler warning */
}
g_slice_free1 (entry_size, entry);
}
g_queue_clear (surface->journal);
if (surface->last_clip) {
_cairo_clip_destroy (surface->last_clip);
surface->last_clip = NULL;
}
}
static CoglAttributeBuffer *
_cairo_cogl_surface_allocate_buffer_space (cairo_cogl_surface_t *surface,
size_t size,
size_t *offset,
void **pointer)
{
/* XXX: In the Cogl journal we found it more efficient to have a pool of
* buffers that we re-cycle but for now we simply thow away our stack
* buffer each time we flush. */
if (unlikely (surface->buffer_stack &&
(surface->buffer_stack_size - surface->buffer_stack_offset) < size)) {
cogl_buffer_unmap (COGL_BUFFER (surface->buffer_stack));
cogl_object_unref (surface->buffer_stack);
surface->buffer_stack = NULL;
surface->buffer_stack_size *= 2;
}
if (unlikely (surface->buffer_stack_size < size))
surface->buffer_stack_size = size * 2;
if (unlikely (surface->buffer_stack == NULL)) {
surface->buffer_stack = cogl_attribute_buffer_new (surface->buffer_stack_size, NULL);
surface->buffer_stack_pointer =
cogl_buffer_map (COGL_BUFFER (surface->buffer_stack),
COGL_BUFFER_ACCESS_WRITE,
COGL_BUFFER_MAP_HINT_DISCARD);
surface->buffer_stack_offset = 0;
}
*pointer = surface->buffer_stack_pointer + surface->buffer_stack_offset;
*offset = surface->buffer_stack_offset;
surface->buffer_stack_offset += size;
return cogl_object_ref (surface->buffer_stack);
}
static CoglAttributeBuffer *
_cairo_cogl_traps_to_triangles_buffer (cairo_cogl_surface_t *surface,
cairo_traps_t *traps,
size_t *offset,
gboolean one_shot)
{
CoglAttributeBuffer *buffer;
int n_traps = traps->num_traps;
int i;
CoglVertexP2 *triangles;
if (one_shot) {
buffer = _cairo_cogl_surface_allocate_buffer_space (surface,
n_traps * sizeof (CoglVertexP2) * 6,
offset,
(void **)&triangles);
if (!buffer)
return NULL;
} else {
buffer = cogl_attribute_buffer_new (n_traps * sizeof (CoglVertexP2) * 6, NULL);
if (!buffer)
return NULL;
triangles = cogl_buffer_map (COGL_BUFFER (buffer),
COGL_BUFFER_ACCESS_WRITE,
COGL_BUFFER_MAP_HINT_DISCARD);
if (!triangles)
return NULL;
*offset = 0;
}
/* XXX: This is can be very expensive. I'm not sure a.t.m if it's
* predominantly the bandwidth required or the cost of the fixed_to_float
* conversions but either way we should try using an index buffer to
* reduce the amount we upload by 1/3 (offset by allocating and uploading
* indices though) sadly though my experience with the intel mesa drivers
* is that slow paths can easily be hit when starting to use indices.
*/
for (i = 0; i < n_traps; i++)
{
CoglVertexP2 *p = &triangles[i * 6];
cairo_trapezoid_t *trap = &traps->traps[i];
p[0].x = _cairo_cogl_util_fixed_to_float (trap->left.p1.x);
p[0].y = _cairo_cogl_util_fixed_to_float (trap->left.p1.y);
p[1].x = _cairo_cogl_util_fixed_to_float (trap->left.p2.x);
p[1].y = _cairo_cogl_util_fixed_to_float (trap->left.p2.y);
p[2].x = _cairo_cogl_util_fixed_to_float (trap->right.p2.x);
p[2].y = _cairo_cogl_util_fixed_to_float (trap->right.p2.y);
p[3].x = _cairo_cogl_util_fixed_to_float (trap->left.p1.x);
p[3].y = _cairo_cogl_util_fixed_to_float (trap->left.p1.y);
p[4].x = _cairo_cogl_util_fixed_to_float (trap->right.p2.x);
p[4].y = _cairo_cogl_util_fixed_to_float (trap->right.p2.y);
p[5].x = _cairo_cogl_util_fixed_to_float (trap->right.p1.x);
p[5].y = _cairo_cogl_util_fixed_to_float (trap->right.p1.y);
}
if (!one_shot)
cogl_buffer_unmap (COGL_BUFFER (buffer));
return buffer;
}
/* Used for solid fills, in this case we just need a mesh made of
* a single (2-component) position attribute. */
static CoglPrimitive *
_cairo_cogl_traps_to_composite_prim_p2 (cairo_cogl_surface_t *surface,
cairo_traps_t *traps,
gboolean one_shot)
{
size_t offset;
CoglAttributeBuffer *buffer = _cairo_cogl_traps_to_triangles_buffer (surface, traps, &offset, one_shot);
CoglAttribute *pos = cogl_attribute_new (buffer,
"cogl_position_in",
sizeof (CoglVertexP2),
offset,
2,
COGL_ATTRIBUTE_TYPE_FLOAT);
CoglPrimitive *prim;
/* The attribute will have taken a reference on the buffer */
cogl_object_unref (buffer);
prim = cogl_primitive_new (COGL_VERTICES_MODE_TRIANGLES,
traps->num_traps * 6, pos, NULL);
/* The primitive will now keep the attribute alive... */
cogl_object_unref (pos);
return prim;
}
/* Used for surface fills, in this case we need a mesh made of a single
* (2-component) position attribute + we also alias the same attribute as
* (2-component) texture coordinates */
static CoglPrimitive *
_cairo_cogl_traps_to_composite_prim_p2t2 (cairo_cogl_surface_t *surface,
cairo_traps_t *traps,
gboolean one_shot)
{
size_t offset;
CoglAttributeBuffer *buffer = _cairo_cogl_traps_to_triangles_buffer (surface, traps, &offset, one_shot);
CoglAttribute *pos = cogl_attribute_new (buffer,
"cogl_position_in",
sizeof (CoglVertexP2),
offset,
2,
COGL_ATTRIBUTE_TYPE_FLOAT);
CoglAttribute *tex_coords = cogl_attribute_new (buffer,
"cogl_tex_coord0_in",
sizeof (CoglVertexP2),
0,
2,
COGL_ATTRIBUTE_TYPE_FLOAT);
CoglPrimitive *prim;
/* The attributes will have taken references on the buffer */
cogl_object_unref (buffer);
prim = cogl_primitive_new (COGL_VERTICES_MODE_TRIANGLES,
traps->num_traps * 6, pos, tex_coords, NULL);
/* The primitive will now keep the attributes alive... */
cogl_object_unref (pos);
cogl_object_unref (tex_coords);
return prim;
}
static CoglPrimitive *
_cairo_cogl_traps_to_composite_prim (cairo_cogl_surface_t *surface,
cairo_traps_t *traps,
int n_layers,
gboolean one_shot)
{
int n_traps = traps->num_traps;
int i;
/* XXX: Ideally we would skip tessellating to traps entirely since
* given their representation, conversion to triangles is quite expensive.
*
* This simplifies the conversion to triangles by making the end points of
* the two side lines actually just correspond to the corners of the
* traps.
*/
for (i = 0; i < n_traps; i++)
_sanitize_trap (&traps->traps[i]);
if (n_layers == 0)
return _cairo_cogl_traps_to_composite_prim_p2 (surface, traps, one_shot);
else {
assert (n_layers == 1);
return _cairo_cogl_traps_to_composite_prim_p2t2 (surface, traps, one_shot);
}
}
static cairo_int_status_t
_cairo_cogl_fill_to_primitive (cairo_cogl_surface_t *surface,
const cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
int n_layers,
cairo_bool_t one_shot,
CoglPrimitive **primitive,
size_t *size)
{
cairo_traps_t traps;
cairo_int_status_t status;
_cairo_traps_init (&traps);
status = _cairo_path_fixed_fill_to_traps (path, fill_rule, tolerance, &traps);
if (unlikely (status))
goto BAIL;
if (traps.num_traps == 0) {
status = CAIRO_INT_STATUS_NOTHING_TO_DO;
goto BAIL;
}
*size = traps.num_traps * sizeof (CoglVertexP2) * 6;
*primitive = _cairo_cogl_traps_to_composite_prim (surface, &traps, n_layers, one_shot);
if (!*primitive) {
status = CAIRO_INT_STATUS_NO_MEMORY;
goto BAIL;
}
BAIL:
_cairo_traps_fini (&traps);
return status;
}
static void
_cairo_cogl_clip_push_box (const cairo_box_t *box)
{
if (_cairo_box_is_pixel_aligned (box)) {
cairo_rectangle_int_t rect;
_cairo_box_round_to_rectangle (box, &rect);
cogl_clip_push_window_rectangle (rect.x, rect.y,
rect.width, rect.height);
} else {
double x1, y1, x2, y2;
_cairo_box_to_doubles (box, &x1, &y1, &x2, &y2);
cogl_clip_push_rectangle (x1, y1, x2, y2);
}
}
static void
_cairo_cogl_journal_flush (cairo_cogl_surface_t *surface)
{
GList *l;
int clip_stack_depth = 0;
int i;
if (!surface->journal)
return;
if (surface->buffer_stack && surface->buffer_stack_offset) {
cogl_buffer_unmap (COGL_BUFFER (surface->buffer_stack));
cogl_object_unref (surface->buffer_stack);
surface->buffer_stack = NULL;
}
cogl_set_framebuffer (surface->framebuffer);
cogl_push_matrix ();
for (l = surface->journal->head; l; l = l->next) {
cairo_cogl_journal_entry_t *entry = l->data;
switch (entry->type)
{
case CAIRO_COGL_JOURNAL_ENTRY_TYPE_CLIP: {
cairo_cogl_journal_clip_entry_t *clip_entry =
(cairo_cogl_journal_clip_entry_t *)entry;
cairo_clip_path_t *path;
#if 0
cairo_bool_t checked_for_primitives = FALSE;
cairo_cogl_clip_primitives_t *clip_primitives;
#endif
for (i = 0; i < clip_stack_depth; i++)
cogl_clip_pop ();
clip_stack_depth = 0;
for (path = clip_entry->clip->path, i = 0; path; path = path->prev, i++) {
cairo_rectangle_int_t extents;
cairo_int_status_t status;
CoglPrimitive *prim;
size_t prim_size;
_cairo_path_fixed_approximate_clip_extents (&path->path, &extents);
/* TODO - maintain a fifo of the last 10 used clips with cached
* primitives to see if we can avoid tesselating the path and
* uploading the vertices...
*/
#if 0
if (!checked_for_primitives) {
clip_primitives = find_clip_primitives (clip);
checked_for_primitives = TRUE;
}
if (clip_primitives)
prim = clip_primitives->primitives[i];
#endif
status = _cairo_cogl_fill_to_primitive (surface,
&path->path,
path->fill_rule,
path->tolerance,
0,
TRUE,
&prim,
&prim_size);
if (unlikely (status)) {
g_warning ("Failed to get primitive for clip path while flushing journal");
continue;
}
clip_stack_depth++;
cogl_clip_push_primitive (prim,
extents.x, extents.y,
extents.x + extents.width,
extents.y + extents.height);
cogl_object_unref (prim);
}
for (i = 0; i < clip_entry->clip->num_boxes; i++) {
clip_stack_depth++;
_cairo_cogl_clip_push_box (&clip_entry->clip->boxes[i]);
}
surface->n_clip_updates_per_frame++;
break;
}
case CAIRO_COGL_JOURNAL_ENTRY_TYPE_RECTANGLE: {
cairo_cogl_journal_rect_entry_t *rect_entry =
(cairo_cogl_journal_rect_entry_t *)entry;
float tex_coords[8];
float x1 = rect_entry->x;
float y1 = rect_entry->y;
float x2 = rect_entry->x + rect_entry->width;
float y2 = rect_entry->y + rect_entry->height;
cairo_matrix_t *ctm = &rect_entry->ctm;
float ctmfv[16] = {
ctm->xx, ctm->yx, 0, 0,
ctm->xy, ctm->yy, 0, 0,
0, 0, 1, 0,
ctm->x0, ctm->y0, 0, 1
};
CoglMatrix transform;
cogl_matrix_init_from_array (&transform, ctmfv);
if (rect_entry->n_layers) {
g_assert (rect_entry->n_layers <= 2);
tex_coords[0] = x1;
tex_coords[1] = y1;
tex_coords[2] = x2;
tex_coords[3] = y2;
if (rect_entry->n_layers > 1)
memcpy (&tex_coords[4], tex_coords, sizeof (float) * 4);
}
cogl_set_source (rect_entry->pipeline);
cogl_push_matrix ();
cogl_transform (&transform);
cogl_rectangle_with_multitexture_coords (x1, y1, x2, y2,
tex_coords, 4 * rect_entry->n_layers);
cogl_pop_matrix ();
break;
}
case CAIRO_COGL_JOURNAL_ENTRY_TYPE_PRIMITIVE: {
cairo_cogl_journal_prim_entry_t *prim_entry =
(cairo_cogl_journal_prim_entry_t *)entry;
CoglMatrix transform;
cogl_push_matrix ();
if (prim_entry->has_transform) {
cairo_matrix_t *ctm = &prim_entry->transform;
float ctmfv[16] = {
ctm->xx, ctm->yx, 0, 0,
ctm->xy, ctm->yy, 0, 0,
0, 0, 1, 0,
ctm->x0, ctm->y0, 0, 1
};
cogl_matrix_init_from_array (&transform, ctmfv);
cogl_transform (&transform);
} else {
cogl_matrix_init_identity (&transform);
cogl_set_modelview_matrix (&transform);
}
cogl_set_source (prim_entry->pipeline);
cogl_primitive_draw (prim_entry->primitive);
cogl_pop_matrix ();
break;
}
case CAIRO_COGL_JOURNAL_ENTRY_TYPE_PATH: {
cairo_cogl_journal_path_entry_t *path_entry =
(cairo_cogl_journal_path_entry_t *)entry;
cogl_set_source (path_entry->pipeline);
cogl_path_fill (path_entry->path);
break;
}
default:
assert (0); /* not reached! */
}
}
cogl_pop_matrix ();
for (i = 0; i < clip_stack_depth; i++)
cogl_clip_pop ();
_cairo_cogl_journal_discard (surface);
}
static cairo_status_t
_cairo_cogl_surface_flush (void *abstract_surface,
unsigned flags)
{
cairo_cogl_surface_t *surface = (cairo_cogl_surface_t *)abstract_surface;
if (flags)
return CAIRO_STATUS_SUCCESS;
_cairo_cogl_journal_flush (surface);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_cogl_surface_finish (void *abstract_surface)
{
cairo_cogl_surface_t *surface = abstract_surface;
if (surface->texture)
cogl_object_unref (surface->texture);
if (surface->framebuffer)
cogl_object_unref (surface->framebuffer);
if (surface->journal)
_cairo_cogl_journal_free (surface);
/*XXX wtf */
cairo_device_release (surface->base.device);
return CAIRO_STATUS_SUCCESS;
}
static CoglPixelFormat
get_cogl_format_from_cairo_format (cairo_format_t cairo_format);
/* XXX: We often use RGBA format for onscreen framebuffers so make sure
* to handle CAIRO_FORMAT_INVALID sensibly */
static cairo_format_t
get_cairo_format_from_cogl_format (CoglPixelFormat format)
{
switch ((int)format)
{
case COGL_PIXEL_FORMAT_A_8:
return CAIRO_FORMAT_A8;
case COGL_PIXEL_FORMAT_RGB_565:
return CAIRO_FORMAT_RGB16_565;
case COGL_PIXEL_FORMAT_BGRA_8888_PRE:
case COGL_PIXEL_FORMAT_ARGB_8888_PRE:
case COGL_PIXEL_FORMAT_RGBA_8888_PRE:
/* Note: this is ambiguous since CAIRO_FORMAT_RGB24
* would also map to the same CoglPixelFormat */
return CAIRO_FORMAT_ARGB32;
default:
g_warning("bad format: %x a? %d, bgr? %d, pre %d, format: %d\n",
format,
format & COGL_A_BIT,
format & COGL_BGR_BIT,
format & COGL_PREMULT_BIT,
format & ~(COGL_A_BIT | COGL_BGR_BIT | COGL_PREMULT_BIT));
return CAIRO_FORMAT_INVALID;
}
}
static CoglPixelFormat
get_cogl_format_from_cairo_format (cairo_format_t cairo_format)
{