static cairo_int_status_t
_cairo_surface_subsurface_stroke (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_path_fixed_t *path,
const cairo_stroke_style_t *stroke_style,
const cairo_matrix_t *ctm,
const cairo_matrix_t *ctm_inverse,
double tolerance,
cairo_antialias_t antialias,
const cairo_clip_t *clip)
{
cairo_surface_subsurface_t *surface = abstract_surface;
cairo_rectangle_int_t rect = { 0, 0, surface->extents.width, surface->extents.height };
cairo_status_t status;
cairo_clip_t *target_clip;
target_clip = _cairo_clip_copy_intersect_rectangle (clip, &rect);
status = _cairo_surface_offset_stroke (surface->target,
-surface->extents.x, -surface->extents.y,
op, source, path, stroke_style, ctm, ctm_inverse,
tolerance, antialias,
target_clip);
_cairo_clip_destroy (target_clip);
return status;
}
static cairo_int_status_t
_prevent_overlapping_drawing (cairo_gl_context_t *ctx,
cairo_gl_composite_t *setup,
cairo_composite_rectangles_t *composite,
const cairo_path_fixed_t *path,
const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm)
{
cairo_rectangle_int_t stroke_extents;
const cairo_pattern_t *pattern = composite->original_source_pattern;
cairo_pattern_type_t type = cairo_pattern_get_type ((cairo_pattern_t *) pattern);
if (! _cairo_gl_ensure_stencil (ctx, setup->dst))
return CAIRO_INT_STATUS_UNSUPPORTED;
/* XXX: improve me - since we have lazy init, we cannot use sample
area */
if (type == CAIRO_PATTERN_TYPE_SOLID &&
_cairo_pattern_is_opaque_solid (pattern))
return CAIRO_INT_STATUS_SUCCESS;
if (glIsEnabled (GL_STENCIL_TEST) == FALSE) {
/* In case we have pending operations we have to flush before
adding the stencil buffer. */
_cairo_gl_composite_flush (ctx);
/* Enable the stencil buffer, even if we are not using it for clipping,
so we can use it below to prevent overlapping shapes. We initialize
it all to one here which represents infinite clip. */
if (! ctx->states_cache.depth_mask) {
glDepthMask (GL_TRUE);
ctx->states_cache.depth_mask = TRUE;
}
glEnable (GL_STENCIL_TEST);
/* If we don't have clip, then we will setup clip extents based on
approximate stroke extent. */
if (! setup->clip) {
_cairo_path_fixed_approximate_stroke_extents (path, style, ctm,
&stroke_extents);
_cairo_gl_scissor_to_extents (setup->dst, &stroke_extents);
}
glClearStencil (1);
glClear (GL_STENCIL_BUFFER_BIT);
glStencilFunc (GL_EQUAL, 1, 1);
}
/* This means that once we draw to a particular pixel nothing else can
be drawn there until the stencil buffer is reset or the stencil test
is disabled. */
glStencilOp (GL_ZERO, GL_ZERO, GL_ZERO);
/* we need to clean up clip cache */
_cairo_clip_destroy (ctx->clip);
ctx->clip = NULL;
return CAIRO_INT_STATUS_SUCCESS;
}
cairo_status_t
_cairo_surface_offset_paint (cairo_surface_t *target,
int x, int y,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_clip_t *clip)
{
cairo_status_t status;
cairo_clip_t *dev_clip = (cairo_clip_t *) clip;
cairo_pattern_union_t source_copy;
if (unlikely (target->status))
return target->status;
if (_cairo_clip_is_all_clipped (clip))
return CAIRO_STATUS_SUCCESS;
if (x | y) {
cairo_matrix_t m;
dev_clip = _cairo_clip_copy_with_translation (clip, -x, -y);
cairo_matrix_init_translate (&m, x, y);
_copy_transformed_pattern (&source_copy.base, source, &m);
source = &source_copy.base;
}
status = _cairo_surface_paint (target, op, source, dev_clip);
if (dev_clip != clip)
_cairo_clip_destroy (dev_clip);
return status;
}
cairo_status_t
_cairo_surface_wrapper_paint (cairo_surface_wrapper_t *wrapper,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_clip_t *clip)
{
cairo_status_t status;
cairo_clip_t *dev_clip;
cairo_pattern_union_t source_copy;
if (unlikely (wrapper->target->status))
return wrapper->target->status;
dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip);
if (_cairo_clip_is_all_clipped (dev_clip))
return (cairo_status_t)CAIRO_INT_STATUS_NOTHING_TO_DO;
if (wrapper->needs_transform) {
cairo_matrix_t m;
_cairo_surface_wrapper_get_transform (wrapper, &m);
status = cairo_matrix_invert (&m);
assert (status == CAIRO_STATUS_SUCCESS);
_copy_transformed_pattern (&source_copy.base, source, &m);
source = &source_copy.base;
}
status = _cairo_surface_paint (wrapper->target, op, source, dev_clip);
_cairo_clip_destroy (dev_clip);
return status;
}
static void
_gl_destroy (void *device)
{
cairo_gl_context_t *ctx = device;
ctx->acquire (ctx);
while (! cairo_list_is_empty (&ctx->fonts)) {
cairo_gl_font_t *font;
font = cairo_list_first_entry (&ctx->fonts,
cairo_gl_font_t,
link);
cairo_list_del (&font->base.link);
cairo_list_del (&font->link);
free (font);
}
_cairo_array_fini (&ctx->tristrip_indices);
cairo_region_destroy (ctx->clip_region);
_cairo_clip_destroy (ctx->clip);
free (ctx->vb);
ctx->destroy (ctx);
free (ctx);
}
static cairo_int_status_t
_cairo_gl_composite_setup_clipping (cairo_gl_composite_t *setup,
cairo_gl_context_t *ctx,
int vertex_size)
{
if (! _cairo_gl_context_is_flushed (ctx) &&
(! cairo_region_equal (ctx->clip_region, setup->clip_region) ||
! _cairo_clip_equal (ctx->clip, setup->clip)))
_cairo_gl_composite_flush (ctx);
cairo_region_destroy (ctx->clip_region);
ctx->clip_region = cairo_region_reference (setup->clip_region);
_cairo_clip_destroy (ctx->clip);
ctx->clip = _cairo_clip_copy (setup->clip);
assert (!setup->clip_region || !setup->clip);
if (ctx->clip_region) {
_disable_stencil_buffer ();
glEnable (GL_SCISSOR_TEST);
return CAIRO_INT_STATUS_SUCCESS;
}
if (ctx->clip)
return _cairo_gl_composite_setup_painted_clipping (setup, ctx,
vertex_size);
_disable_stencil_buffer ();
glDisable (GL_SCISSOR_TEST);
return CAIRO_INT_STATUS_SUCCESS;
}
static cairo_int_status_t
clip_and_composite_polygon (const cairo_spans_compositor_t *compositor,
cairo_composite_rectangles_t *extents,
cairo_polygon_t *polygon,
cairo_fill_rule_t fill_rule,
cairo_antialias_t antialias)
{
cairo_int_status_t status;
/* XXX simply uses polygon limits.point extemities, tessellation? */
status = trim_extents_to_polygon (extents, polygon);
if (unlikely (status))
return status;
if (_cairo_polygon_is_empty (polygon)) {
cairo_boxes_t boxes;
if (extents->is_bounded)
return CAIRO_STATUS_SUCCESS;
_cairo_boxes_init (&boxes);
extents->bounded.width = extents->bounded.height = 0;
return fixup_unbounded_boxes (compositor, extents, &boxes);
}
if (extents->is_bounded && extents->clip->path) {
cairo_polygon_t clipper;
cairo_antialias_t clip_antialias;
cairo_fill_rule_t clip_fill_rule;
status = _cairo_clip_get_polygon (extents->clip,
&clipper,
&clip_fill_rule,
&clip_antialias);
if (likely (status == CAIRO_INT_STATUS_SUCCESS)) {
cairo_clip_t *old_clip;
if (clip_antialias == antialias) {
/* refresh limits after trimming extents */
_cairo_polygon_limit_to_clip(polygon, extents->clip);
status = _cairo_polygon_intersect (polygon, fill_rule,
&clipper, clip_fill_rule);
_cairo_polygon_fini (&clipper);
if (unlikely (status))
return status;
old_clip = extents->clip;
extents->clip = _cairo_clip_copy_region (extents->clip);
_cairo_clip_destroy (old_clip);
} else {
_cairo_polygon_fini (&clipper);
}
}
}
return composite_polygon (compositor, extents,
polygon, fill_rule, antialias);
}
static cairo_int_status_t
_prevent_overlapping_strokes (cairo_gl_context_t *ctx,
cairo_gl_composite_t *setup,
cairo_composite_rectangles_t *composite,
const cairo_path_fixed_t *path,
const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm)
{
cairo_rectangle_int_t stroke_extents;
if (! _cairo_gl_ensure_stencil (ctx, setup->dst))
return CAIRO_INT_STATUS_UNSUPPORTED;
if (_cairo_pattern_is_opaque (&composite->source_pattern.base,
&composite->source_sample_area))
return CAIRO_INT_STATUS_SUCCESS;
if (glIsEnabled (GL_STENCIL_TEST) == FALSE) {
cairo_bool_t scissor_was_enabled;
/* In case we have pending operations we have to flush before
adding the stencil buffer. */
_cairo_gl_composite_flush (ctx);
/* Enable the stencil buffer, even if we are not using it for clipping,
so we can use it below to prevent overlapping shapes. We initialize
it all to one here which represents infinite clip. */
glDepthMask (GL_TRUE);
glEnable (GL_STENCIL_TEST);
/* We scissor here so that we don't have to clear the entire stencil
* buffer. If the scissor test is already enabled, it was enabled
* for clipping. In that case, instead of calculating an intersection,
* we just reuse it, and risk clearing too much. */
scissor_was_enabled = glIsEnabled (GL_SCISSOR_TEST);
if (! scissor_was_enabled) {
_cairo_path_fixed_approximate_stroke_extents (path, style, ctm,
FALSE, /* is_vector */
&stroke_extents);
_cairo_gl_scissor_to_rectangle (setup->dst, &stroke_extents);
}
glClearStencil (1);
glClear (GL_STENCIL_BUFFER_BIT);
if (! scissor_was_enabled)
glDisable (GL_SCISSOR_TEST);
glStencilFunc (GL_EQUAL, 1, 1);
}
/* This means that once we draw to a particular pixel nothing else can
be drawn there until the stencil buffer is reset or the stencil test
is disabled. */
glStencilOp (GL_ZERO, GL_ZERO, GL_ZERO);
_cairo_clip_destroy (setup->dst->clip_on_stencil_buffer);
setup->dst->clip_on_stencil_buffer = NULL;
return CAIRO_INT_STATUS_SUCCESS;
}
cairo_status_t
_cairo_surface_clipper_set_clip (cairo_surface_clipper_t *clipper,
const cairo_clip_t *clip)
{
cairo_status_t status;
cairo_bool_t incremental = FALSE;
if (_cairo_clip_equal (clip, clipper->clip))
return CAIRO_STATUS_SUCCESS;
/* all clipped out state should never propagate this far */
assert (!_cairo_clip_is_all_clipped (clip));
/* XXX Is this an incremental clip? */
if (clipper->clip && clip &&
clip->num_boxes == clipper->clip->num_boxes &&
memcmp (clip->boxes, clipper->clip->boxes,
sizeof (cairo_box_t) * clip->num_boxes) == 0)
{
cairo_clip_path_t *clip_path = clip->path;
while (clip_path != NULL && clip_path != clipper->clip->path)
clip_path = clip_path->prev;
if (clip_path) {
incremental = TRUE;
status = _cairo_surface_clipper_intersect_clip_path_recursive (clipper,
clip->path,
clipper->clip->path);
}
}
_cairo_clip_destroy (clipper->clip);
clipper->clip = _cairo_clip_copy (clip);
if (incremental)
return status;
status = clipper->intersect_clip_path (clipper, NULL, 0, 0, 0);
if (unlikely (status))
return status;
if (clip == NULL)
return CAIRO_STATUS_SUCCESS;
status = _cairo_surface_clipper_intersect_clip_boxes (clipper, clip);
if (unlikely (status))
return status;
if (clip->path != NULL) {
status = _cairo_surface_clipper_intersect_clip_path_recursive (clipper,
clip->path,
NULL);
}
return status;
}
cairo_status_t
_cairo_surface_offset_glyphs (cairo_surface_t *surface,
int x, int y,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
const cairo_clip_t *clip)
{
cairo_status_t status;
cairo_clip_t *dev_clip = (cairo_clip_t *) clip;
cairo_pattern_union_t source_copy;
cairo_glyph_t *dev_glyphs;
int i;
if (unlikely (surface->status))
return surface->status;
if (_cairo_clip_is_all_clipped (clip))
return CAIRO_STATUS_SUCCESS;
dev_glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t));
if (dev_glyphs == NULL)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
memcpy (dev_glyphs, glyphs, sizeof (cairo_glyph_t) * num_glyphs);
if (x | y) {
cairo_matrix_t m;
dev_clip = _cairo_clip_copy_with_translation (clip, -x, -y);
cairo_matrix_init_translate (&m, x, y);
_copy_transformed_pattern (&source_copy.base, source, &m);
source = &source_copy.base;
for (i = 0; i < num_glyphs; i++) {
dev_glyphs[i].x -= x;
dev_glyphs[i].y -= y;
}
}
status = _cairo_surface_show_text_glyphs (surface, op, source,
NULL, 0,
dev_glyphs, num_glyphs,
NULL, 0, 0,
scaled_font,
dev_clip);
if (dev_clip != clip)
_cairo_clip_destroy (dev_clip);
cr_free (dev_glyphs);
return status;
}
cairo_status_t
_cairo_surface_offset_fill (cairo_surface_t *surface,
int x, int y,
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_status_t status;
cairo_path_fixed_t path_copy, *dev_path = (cairo_path_fixed_t *) path;
cairo_clip_t *dev_clip = (cairo_clip_t *) clip;
cairo_pattern_union_t source_copy;
if (unlikely (surface->status))
return surface->status;
if (_cairo_clip_is_all_clipped (clip))
return CAIRO_STATUS_SUCCESS;
if (x | y) {
cairo_matrix_t m;
dev_clip = _cairo_clip_copy_with_translation (clip, -x, -y);
status = _cairo_path_fixed_init_copy (&path_copy, dev_path);
if (unlikely (status))
goto FINISH;
_cairo_path_fixed_translate (&path_copy,
_cairo_fixed_from_int (-x),
_cairo_fixed_from_int (-y));
dev_path = &path_copy;
cairo_matrix_init_translate (&m, x, y);
_copy_transformed_pattern (&source_copy.base, source, &m);
source = &source_copy.base;
}
status = _cairo_surface_fill (surface, op, source,
dev_path, fill_rule,
tolerance, antialias,
dev_clip);
FINISH:
if (dev_path != path)
_cairo_path_fixed_fini (dev_path);
if (dev_clip != clip)
_cairo_clip_destroy (dev_clip);
return status;
}
cairo_status_t
_cairo_surface_wrapper_fill (cairo_surface_wrapper_t *wrapper,
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_status_t status;
cairo_path_fixed_t path_copy, *dev_path = (cairo_path_fixed_t *) path;
cairo_pattern_union_t source_copy;
cairo_clip_t *dev_clip;
if (unlikely (wrapper->target->status))
return wrapper->target->status;
dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip);
if (_cairo_clip_is_all_clipped (dev_clip))
return CAIRO_INT_STATUS_NOTHING_TO_DO;
if (wrapper->needs_transform) {
cairo_matrix_t m;
_cairo_surface_wrapper_get_transform (wrapper, &m);
status = _cairo_path_fixed_init_copy (&path_copy, dev_path);
if (unlikely (status))
goto FINISH;
_cairo_path_fixed_transform (&path_copy, &m);
dev_path = &path_copy;
status = cairo_matrix_invert (&m);
assert (status == CAIRO_STATUS_SUCCESS);
_copy_transformed_pattern (&source_copy.base, source, &m);
source = &source_copy.base;
}
status = _cairo_surface_fill (wrapper->target, op, source,
dev_path, fill_rule,
tolerance, antialias,
dev_clip);
FINISH:
if (dev_path != path)
_cairo_path_fixed_fini (dev_path);
_cairo_clip_destroy (dev_clip);
return status;
}
static cairo_int_status_t
_paint_fallback_image (cairo_paginated_surface_t *surface,
cairo_rectangle_int_t *rect)
{
double x_scale = surface->base.x_fallback_resolution / surface->target->x_resolution;
double y_scale = surface->base.y_fallback_resolution / surface->target->y_resolution;
int x, y, width, height;
cairo_status_t status;
cairo_surface_t *image;
cairo_surface_pattern_t pattern;
cairo_clip_t *clip;
x = rect->x;
y = rect->y;
width = rect->width;
height = rect->height;
image = _cairo_paginated_surface_create_image_surface (surface,
ceil (width * x_scale),
ceil (height * y_scale));
_cairo_surface_set_device_scale (image, x_scale, y_scale);
/* set_device_offset just sets the x0/y0 components of the matrix;
* so we have to do the scaling manually. */
cairo_surface_set_device_offset (image, -x*x_scale, -y*y_scale);
status = _cairo_recording_surface_replay (surface->recording_surface, image);
if (unlikely (status))
goto CLEANUP_IMAGE;
_cairo_pattern_init_for_surface (&pattern, image);
cairo_matrix_init (&pattern.base.matrix,
x_scale, 0, 0, y_scale, -x*x_scale, -y*y_scale);
/* the fallback should be rendered at native resolution, so disable
* filtering (if possible) to avoid introducing potential artifacts. */
pattern.base.filter = CAIRO_FILTER_NEAREST;
clip = _cairo_clip_intersect_rectangle (NULL, rect);
status = _cairo_surface_paint (surface->target,
CAIRO_OPERATOR_SOURCE,
&pattern.base, clip);
_cairo_clip_destroy (clip);
_cairo_pattern_fini (&pattern.base);
CLEANUP_IMAGE:
cairo_surface_destroy (image);
return (cairo_int_status_t)status;
}
cairo_status_t
_cairo_surface_wrapper_tag (cairo_surface_wrapper_t *wrapper,
cairo_bool_t begin,
const char *tag_name,
const char *attributes,
const cairo_pattern_t *source,
const cairo_stroke_style_t *stroke_style,
const cairo_matrix_t *ctm,
const cairo_matrix_t *ctm_inverse,
const cairo_clip_t *clip)
{
cairo_status_t status;
cairo_clip_t *dev_clip;
cairo_matrix_t dev_ctm = *ctm;
cairo_matrix_t dev_ctm_inverse = *ctm_inverse;
cairo_pattern_union_t source_copy;
if (unlikely (wrapper->target->status))
return wrapper->target->status;
dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip);
if (wrapper->needs_transform) {
cairo_matrix_t m;
_cairo_surface_wrapper_get_transform (wrapper, &m);
cairo_matrix_multiply (&dev_ctm, &dev_ctm, &m);
status = cairo_matrix_invert (&m);
assert (status == CAIRO_STATUS_SUCCESS);
cairo_matrix_multiply (&dev_ctm_inverse, &m, &dev_ctm_inverse);
_copy_transformed_pattern (&source_copy.base, source, &m);
source = &source_copy.base;
}
status = _cairo_surface_tag (wrapper->target,
begin, tag_name, attributes,
source, stroke_style,
&dev_ctm, &dev_ctm_inverse,
dev_clip);
_cairo_clip_destroy (dev_clip);
return status;
}
static cairo_int_status_t
_cairo_surface_subsurface_paint (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_clip_t *clip)
{
cairo_surface_subsurface_t *surface = abstract_surface;
cairo_rectangle_int_t rect = { 0, 0, surface->extents.width, surface->extents.height };
cairo_status_t status;
cairo_clip_t *target_clip;
target_clip = _cairo_clip_copy_intersect_rectangle (clip, &rect);
status = _cairo_surface_offset_paint (surface->target,
-surface->extents.x, -surface->extents.y,
op, source, target_clip);
_cairo_clip_destroy (target_clip);
return status;
}
static cairo_int_status_t
_cairo_gl_composite_setup_clipping (cairo_gl_composite_t *setup,
cairo_gl_context_t *ctx,
int vertex_size)
{
cairo_bool_t clip_changing = TRUE;
cairo_bool_t clip_region_changing = TRUE;
if (! ctx->clip && ! setup->clip && ! setup->clip_region && ! ctx->clip_region)
goto disable_all_clipping;
clip_changing = ! _cairo_clip_equal (ctx->clip, setup->clip);
clip_region_changing = ! cairo_region_equal (ctx->clip_region, setup->clip_region);
if (! _cairo_gl_context_is_flushed (ctx) &&
(clip_region_changing || clip_changing))
_cairo_gl_composite_flush (ctx);
assert (!setup->clip_region || !setup->clip);
/* setup->clip is only used by the msaa compositor and setup->clip_region
* only by the other compositors, so it's safe to wait to clean up obsolete
* clips. */
if (clip_region_changing) {
cairo_region_destroy (ctx->clip_region);
ctx->clip_region = cairo_region_reference (setup->clip_region);
}
if (clip_changing) {
_cairo_clip_destroy (ctx->clip);
ctx->clip = _cairo_clip_copy (setup->clip);
}
/* For clip regions, we scissor right before drawing. */
if (setup->clip_region)
goto disable_all_clipping;
if (setup->clip)
return _cairo_gl_composite_setup_painted_clipping (setup, ctx,
vertex_size);
disable_all_clipping:
_disable_stencil_buffer ();
glDisable (GL_SCISSOR_TEST);
return CAIRO_INT_STATUS_SUCCESS;
}
cairo_status_t
_cairo_clip_combine_with_surface (const cairo_clip_t *clip,
cairo_surface_t *dst,
int dst_x, int dst_y)
{
cairo_clip_path_t *copy_path;
cairo_clip_path_t *clip_path;
cairo_clip_t *copy;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
copy = _cairo_clip_copy_with_translation (clip, -dst_x, -dst_y);
copy_path = copy->path;
copy->path = NULL;
if (copy->boxes) {
status = _cairo_surface_paint (dst,
CAIRO_OPERATOR_IN,
&_cairo_pattern_white.base,
copy);
}
clip = NULL;
if (_cairo_clip_is_region (copy))
clip = copy;
clip_path = copy_path;
while (status == CAIRO_STATUS_SUCCESS && clip_path) {
status = _cairo_surface_fill (dst,
CAIRO_OPERATOR_IN,
&_cairo_pattern_white.base,
&clip_path->path,
clip_path->fill_rule,
clip_path->tolerance,
clip_path->antialias,
clip);
clip_path = clip_path->prev;
}
copy->path = copy_path;
_cairo_clip_destroy (copy);
return status;
}
cairo_surface_t *
_cairo_clip_get_surface (const cairo_clip_t *clip,
cairo_surface_t *target,
int *tx, int *ty)
{
cairo_surface_t *surface;
cairo_status_t status;
cairo_clip_t *copy, *region;
cairo_clip_path_t *copy_path, *clip_path;
if (clip->num_boxes) {
cairo_path_fixed_t path;
int i;
surface = _cairo_surface_create_scratch (target,
CAIRO_CONTENT_ALPHA,
clip->extents.width,
clip->extents.height,
CAIRO_COLOR_TRANSPARENT);
if (unlikely (surface->status))
return surface;
_cairo_path_fixed_init (&path);
status = CAIRO_STATUS_SUCCESS;
for (i = 0; status == CAIRO_STATUS_SUCCESS && i < clip->num_boxes; i++) {
status = _cairo_path_fixed_add_box (&path, &clip->boxes[i],
-_cairo_fixed_from_int (clip->extents.x),
-_cairo_fixed_from_int (clip->extents.y));
}
if (status == CAIRO_STATUS_SUCCESS)
status = _cairo_surface_fill (surface,
CAIRO_OPERATOR_ADD,
&_cairo_pattern_white.base,
&path,
CAIRO_FILL_RULE_WINDING,
1.,
CAIRO_ANTIALIAS_DEFAULT,
NULL);
_cairo_path_fixed_fini (&path);
if (unlikely (status)) {
cairo_surface_destroy (surface);
return _cairo_surface_create_in_error (status);
}
} else {
surface = _cairo_surface_create_scratch (target,
CAIRO_CONTENT_ALPHA,
clip->extents.width,
clip->extents.height,
CAIRO_COLOR_WHITE);
if (unlikely (surface->status))
return surface;
}
copy = _cairo_clip_copy_with_translation (clip,
-clip->extents.x,
-clip->extents.y);
copy_path = copy->path;
copy->path = NULL;
region = copy;
if (! _cairo_clip_is_region (copy))
region = _cairo_clip_copy_region (copy);
status = CAIRO_STATUS_SUCCESS;
clip_path = copy_path;
while (status == CAIRO_STATUS_SUCCESS && clip_path) {
status = _cairo_surface_fill (surface,
CAIRO_OPERATOR_IN,
&_cairo_pattern_white.base,
&clip_path->path,
clip_path->fill_rule,
clip_path->tolerance,
clip_path->antialias,
region);
clip_path = clip_path->prev;
}
copy->path = copy_path;
_cairo_clip_destroy (copy);
if (region != copy)
_cairo_clip_destroy (region);
if (unlikely (status)) {
cairo_surface_destroy (surface);
return _cairo_surface_create_in_error (status);
}
*tx = clip->extents.x;
*ty = clip->extents.y;
return surface;
}
static cairo_int_status_t
clip_and_composite_boxes (const cairo_spans_compositor_t *compositor,
cairo_composite_rectangles_t *extents,
cairo_boxes_t *boxes)
{
cairo_int_status_t status;
cairo_polygon_t polygon;
TRACE ((stderr, "%s\n", __FUNCTION__));
status = trim_extents_to_boxes (extents, boxes);
if (unlikely (status))
return status;
if (boxes->num_boxes == 0) {
if (extents->is_bounded)
return CAIRO_STATUS_SUCCESS;
return fixup_unbounded_boxes (compositor, extents, boxes);
}
/* Can we reduce drawing through a clip-mask to simply drawing the clip? */
if (extents->clip->path != NULL && extents->is_bounded) {
cairo_polygon_t polygon;
cairo_fill_rule_t fill_rule;
cairo_antialias_t antialias;
cairo_clip_t *clip;
clip = _cairo_clip_copy (extents->clip);
clip = _cairo_clip_intersect_boxes (clip, boxes);
if (_cairo_clip_is_all_clipped (clip))
return CAIRO_INT_STATUS_NOTHING_TO_DO;
status = _cairo_clip_get_polygon (clip, &polygon,
&fill_rule, &antialias);
_cairo_clip_path_destroy (clip->path);
clip->path = NULL;
if (likely (status == CAIRO_INT_STATUS_SUCCESS)) {
cairo_clip_t *saved_clip = extents->clip;
extents->clip = clip;
status = clip_and_composite_polygon (compositor, extents, &polygon,
fill_rule, antialias);
clip = extents->clip;
extents->clip = saved_clip;
_cairo_polygon_fini (&polygon);
}
_cairo_clip_destroy (clip);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
}
if (boxes->is_pixel_aligned) {
status = composite_aligned_boxes (compositor, extents, boxes);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
}
status = composite_boxes (compositor, extents, boxes);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
status = _cairo_polygon_init_boxes (&polygon, boxes);
if (unlikely (status))
return status;
status = composite_polygon (compositor, extents, &polygon,
CAIRO_FILL_RULE_WINDING,
CAIRO_ANTIALIAS_DEFAULT);
_cairo_polygon_fini (&polygon);
return status;
}
static cairo_int_status_t
_cairo_spans_compositor_stroke (const cairo_compositor_t *_compositor,
cairo_composite_rectangles_t *extents,
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_spans_compositor_t *compositor = (cairo_spans_compositor_t*)_compositor;
cairo_int_status_t status;
TRACE_ (_cairo_debug_print_path (stderr, path));
status = CAIRO_INT_STATUS_UNSUPPORTED;
if (_cairo_path_fixed_stroke_is_rectilinear (path)) {
cairo_boxes_t boxes;
_cairo_boxes_init (&boxes);
if (! _cairo_clip_contains_rectangle (extents->clip, &extents->mask))
_cairo_boxes_limit (&boxes,
extents->clip->boxes,
extents->clip->num_boxes);
status = _cairo_path_fixed_stroke_rectilinear_to_boxes (path,
style,
ctm,
antialias,
&boxes);
if (likely (status == CAIRO_INT_STATUS_SUCCESS))
status = clip_and_composite_boxes (compositor, extents, &boxes);
_cairo_boxes_fini (&boxes);
}
if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
cairo_polygon_t polygon;
cairo_fill_rule_t fill_rule = CAIRO_FILL_RULE_WINDING;
if (extents->mask.width > extents->unbounded.width ||
extents->mask.height > extents->unbounded.height)
{
cairo_box_t limits;
_cairo_box_from_rectangle (&limits, &extents->unbounded);
_cairo_polygon_init (&polygon, &limits, 1);
}
else
{
_cairo_polygon_init (&polygon, NULL, 0);
}
status = _cairo_path_fixed_stroke_to_polygon (path,
style,
ctm, ctm_inverse,
tolerance,
&polygon);
TRACE_ (_cairo_debug_print_polygon (stderr, &polygon));
if (status == CAIRO_INT_STATUS_SUCCESS && extents->clip->num_boxes > 1) {
status = _cairo_polygon_intersect_with_boxes (&polygon, &fill_rule,
extents->clip->boxes,
extents->clip->num_boxes);
}
if (likely (status == CAIRO_INT_STATUS_SUCCESS)) {
cairo_clip_t *saved_clip = extents->clip;
if (extents->is_bounded) {
extents->clip = _cairo_clip_copy_path (extents->clip);
extents->clip = _cairo_clip_intersect_box(extents->clip,
&polygon.extents);
}
status = clip_and_composite_polygon (compositor, extents, &polygon,
fill_rule, antialias);
if (extents->is_bounded) {
_cairo_clip_destroy (extents->clip);
extents->clip = saved_clip;
}
}
_cairo_polygon_fini (&polygon);
}
return status;
}
void _cairo_composite_rectangles_fini (cairo_composite_rectangles_t *extents)
{
_cairo_clip_destroy (extents->clip);
}
cairo_int_status_t
_cairo_composite_rectangles_intersect_mask_extents (cairo_composite_rectangles_t *extents,
const cairo_box_t *box)
{
cairo_rectangle_int_t mask;
cairo_clip_t *clip;
_cairo_box_round_to_rectangle (box, &mask);
if (mask.x == extents->mask.x &&
mask.y == extents->mask.y &&
mask.width == extents->mask.width &&
mask.height == extents->mask.height)
{
return CAIRO_INT_STATUS_SUCCESS;
}
_cairo_rectangle_intersect (&extents->mask, &mask);
mask = extents->bounded;
if (! _cairo_rectangle_intersect (&extents->bounded, &extents->mask) &&
extents->is_bounded & CAIRO_OPERATOR_BOUND_BY_MASK)
return CAIRO_INT_STATUS_NOTHING_TO_DO;
if (mask.width == extents->bounded.width &&
mask.height == extents->bounded.height)
return CAIRO_INT_STATUS_SUCCESS;
if (extents->is_bounded == (CAIRO_OPERATOR_BOUND_BY_MASK | CAIRO_OPERATOR_BOUND_BY_SOURCE)) {
extents->unbounded = extents->bounded;
} else if (extents->is_bounded & CAIRO_OPERATOR_BOUND_BY_MASK) {
if (!_cairo_rectangle_intersect (&extents->unbounded, &extents->mask))
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
clip = extents->clip;
extents->clip = _cairo_clip_reduce_for_composite (clip, extents);
if (clip != extents->clip)
_cairo_clip_destroy (clip);
if (_cairo_clip_is_all_clipped (extents->clip))
return CAIRO_INT_STATUS_NOTHING_TO_DO;
if (! _cairo_rectangle_intersect (&extents->unbounded,
_cairo_clip_get_extents (extents->clip)))
return CAIRO_INT_STATUS_NOTHING_TO_DO;
if (extents->source_pattern.base.type != CAIRO_PATTERN_TYPE_SOLID)
_cairo_pattern_sampled_area (&extents->source_pattern.base,
&extents->bounded,
&extents->source_sample_area);
if (extents->mask_pattern.base.type != CAIRO_PATTERN_TYPE_SOLID) {
_cairo_pattern_sampled_area (&extents->mask_pattern.base,
&extents->bounded,
&extents->mask_sample_area);
if (extents->mask_sample_area.width == 0 ||
extents->mask_sample_area.height == 0)
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
return CAIRO_INT_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_gl_msaa_compositor_fill (const cairo_compositor_t *compositor,
cairo_composite_rectangles_t *composite,
const cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias)
{
cairo_gl_composite_t setup;
cairo_gl_surface_t *dst = (cairo_gl_surface_t *) composite->surface;
cairo_gl_context_t *ctx = NULL;
cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS;
cairo_traps_t traps;
cairo_bool_t use_color_attr = FALSE;
if (! can_use_msaa_compositor (dst, antialias))
return CAIRO_INT_STATUS_UNSUPPORTED;
if (composite->is_bounded == FALSE) {
cairo_surface_t* surface = _prepare_unbounded_surface (dst);
if (unlikely (surface == NULL))
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_compositor_fill (compositor, surface,
CAIRO_OPERATOR_SOURCE,
&composite->source_pattern.base,
path, fill_rule, tolerance,
antialias, NULL);
if (unlikely (status)) {
cairo_surface_destroy (surface);
return status;
}
return _paint_back_unbounded_surface (compositor, composite, surface);
}
if (_cairo_path_fixed_fill_is_rectilinear (path) &&
composite->clip != NULL &&
composite->clip->num_boxes == 1 &&
composite->clip->path == NULL) {
cairo_clip_t *clip = _cairo_clip_copy (composite->clip);
clip = _cairo_clip_intersect_rectilinear_path (clip,
path,
fill_rule,
antialias);
if (clip->num_boxes)
status = _cairo_gl_msaa_compositor_fill_rectilinear (compositor,
composite,
path,
fill_rule,
tolerance,
antialias,
clip);
_cairo_clip_destroy (clip);
return status;
}
status = _cairo_gl_composite_init (&setup,
composite->op,
dst,
FALSE /* assume_component_alpha */);
if (unlikely (status)) {
_cairo_gl_composite_fini (&setup);
return status;
}
_cairo_traps_init (&traps);
if (_cairo_path_fixed_fill_is_rectilinear (path)) {
status = _cairo_path_fixed_fill_rectilinear_to_traps (path,
fill_rule,
antialias,
&traps);
use_color_attr = TRUE;
} else
status = _cairo_path_fixed_fill_to_traps (path, fill_rule,
tolerance, &traps);
if (unlikely (status))
goto cleanup_traps;
status = _cairo_gl_composite_set_source (&setup,
composite->original_source_pattern,
&composite->source_sample_area,
&composite->bounded,
use_color_attr);
if (unlikely (status))
goto cleanup_setup;
_cairo_gl_msaa_compositor_set_clip (composite, &setup);
status = _cairo_gl_composite_begin_multisample (&setup, &ctx,
antialias != CAIRO_ANTIALIAS_NONE);
if (unlikely (status))
goto cleanup_setup;
status = _draw_traps (ctx, &setup, &traps);
if (unlikely (status))
goto cleanup_setup;
cleanup_setup:
_cairo_gl_composite_fini (&setup);
if (ctx)
status = _cairo_gl_context_release (ctx, status);
cleanup_traps:
_cairo_traps_fini (&traps);
return status;
}
static cairo_int_status_t
_cairo_shape_mask_compositor_stroke (const cairo_compositor_t *_compositor,
cairo_composite_rectangles_t *extents,
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)
{
cairo_surface_t *mask;
cairo_surface_pattern_t pattern;
cairo_int_status_t status;
cairo_clip_t *clip;
if (! extents->is_bounded)
return CAIRO_INT_STATUS_UNSUPPORTED;
TRACE ((stderr, "%s\n", __FUNCTION__));
mask = _cairo_surface_create_scratch (extents->surface,
CAIRO_CONTENT_ALPHA,
extents->bounded.width,
extents->bounded.height,
NULL);
if (unlikely (mask->status))
return mask->status;
clip = extents->clip;
if (! _cairo_clip_is_region (clip))
clip = _cairo_clip_copy_region (clip);
if (! mask->is_clear) {
status = _cairo_surface_offset_paint (mask,
extents->bounded.x,
extents->bounded.y,
CAIRO_OPERATOR_CLEAR,
&_cairo_pattern_clear.base,
clip);
if (unlikely (status))
goto error;
}
status = _cairo_surface_offset_stroke (mask,
extents->bounded.x,
extents->bounded.y,
CAIRO_OPERATOR_ADD,
&_cairo_pattern_white.base,
path, style, ctm, ctm_inverse,
tolerance, antialias,
clip);
if (unlikely (status))
goto error;
if (clip != extents->clip) {
status = _cairo_clip_combine_with_surface (extents->clip, mask,
extents->bounded.x,
extents->bounded.y);
if (unlikely (status))
goto error;
}
_cairo_pattern_init_for_surface (&pattern, mask);
cairo_matrix_init_translate (&pattern.base.matrix,
-extents->bounded.x,
-extents->bounded.y);
pattern.base.filter = CAIRO_FILTER_NEAREST;
pattern.base.extend = CAIRO_EXTEND_NONE;
if (extents->op == CAIRO_OPERATOR_SOURCE) {
status = _cairo_surface_mask (extents->surface,
CAIRO_OPERATOR_DEST_OUT,
&_cairo_pattern_white.base,
&pattern.base,
clip);
if ((status == CAIRO_INT_STATUS_SUCCESS)) {
status = _cairo_surface_mask (extents->surface,
CAIRO_OPERATOR_ADD,
&extents->source_pattern.base,
&pattern.base,
clip);
}
} else {
status = _cairo_surface_mask (extents->surface,
extents->op,
&extents->source_pattern.base,
&pattern.base,
clip);
}
_cairo_pattern_fini (&pattern.base);
error:
cairo_surface_destroy (mask);
if (clip != extents->clip)
_cairo_clip_destroy (clip);
return status;
}
static cairo_int_status_t
composite_aligned_boxes (const cairo_spans_compositor_t *compositor,
const cairo_composite_rectangles_t *extents,
cairo_boxes_t *boxes)
{
cairo_surface_t *dst = extents->surface;
cairo_operator_t op = extents->op;
const cairo_pattern_t *source = &extents->source_pattern.base;
cairo_int_status_t status;
cairo_bool_t need_clip_mask = ! _clip_is_region (extents->clip);
cairo_bool_t op_is_source;
cairo_bool_t no_mask;
cairo_bool_t inplace;
TRACE ((stderr, "%s: need_clip_mask=%d, is-bounded=%d\n",
__FUNCTION__, need_clip_mask, extents->is_bounded));
if (need_clip_mask && ! extents->is_bounded)
return CAIRO_INT_STATUS_UNSUPPORTED;
no_mask = extents->mask_pattern.base.type == CAIRO_PATTERN_TYPE_SOLID &&
CAIRO_COLOR_IS_OPAQUE (&extents->mask_pattern.solid.color);
op_is_source = op_reduces_to_source (extents, no_mask);
inplace = ! need_clip_mask && op_is_source && no_mask;
TRACE ((stderr, "%s: op-is-source=%d [op=%d], no-mask=%d, inplace=%d\n",
__FUNCTION__, op_is_source, op, no_mask, inplace));
if (op == CAIRO_OPERATOR_SOURCE && (need_clip_mask || ! no_mask)) {
/* SOURCE with a mask is actually a LERP in cairo semantics */
if ((compositor->flags & CAIRO_SPANS_COMPOSITOR_HAS_LERP) == 0)
return CAIRO_INT_STATUS_UNSUPPORTED;
}
/* Are we just copying a recording surface? */
if (inplace &&
recording_pattern_contains_sample (&extents->source_pattern.base,
&extents->source_sample_area))
{
cairo_clip_t *recording_clip;
const cairo_pattern_t *source = &extents->source_pattern.base;
/* XXX could also do tiling repeat modes... */
/* first clear the area about to be overwritten */
if (! dst->is_clear)
status = compositor->fill_boxes (dst,
CAIRO_OPERATOR_CLEAR,
CAIRO_COLOR_TRANSPARENT,
boxes);
recording_clip = _cairo_clip_from_boxes (boxes);
status = _cairo_recording_surface_replay_with_clip (unwrap_source (source),
&source->matrix,
dst, recording_clip);
_cairo_clip_destroy (recording_clip);
return status;
}
status = CAIRO_INT_STATUS_UNSUPPORTED;
if (! need_clip_mask && no_mask && source->type == CAIRO_PATTERN_TYPE_SOLID) {
const cairo_color_t *color;
color = &((cairo_solid_pattern_t *) source)->color;
if (op_is_source)
op = CAIRO_OPERATOR_SOURCE;
status = compositor->fill_boxes (dst, op, color, boxes);
} else if (inplace && source->type == CAIRO_PATTERN_TYPE_SURFACE) {
status = upload_boxes (compositor, extents, boxes);
}
if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
cairo_surface_t *src;
cairo_surface_t *mask = NULL;
int src_x, src_y;
int mask_x = 0, mask_y = 0;
/* All typical cases will have been resolved before now... */
if (need_clip_mask) {
mask = get_clip_surface (compositor, dst, extents->clip,
&extents->bounded);
if (unlikely (mask->status))
return mask->status;
mask_x = -extents->bounded.x;
mask_y = -extents->bounded.y;
}
/* XXX but this is still ugly */
if (! no_mask) {
src = compositor->pattern_to_surface (dst,
&extents->mask_pattern.base,
TRUE,
&extents->bounded,
&extents->mask_sample_area,
&src_x, &src_y);
if (unlikely (src->status)) {
cairo_surface_destroy (mask);
return src->status;
}
if (mask != NULL) {
status = compositor->composite_boxes (mask, CAIRO_OPERATOR_IN,
src, NULL,
src_x, src_y,
0, 0,
mask_x, mask_y,
boxes, &extents->bounded);
cairo_surface_destroy (src);
} else {
mask = src;
mask_x = src_x;
mask_y = src_y;
}
}
src = compositor->pattern_to_surface (dst, source, FALSE,
&extents->bounded,
&extents->source_sample_area,
&src_x, &src_y);
if (likely (src->status == CAIRO_STATUS_SUCCESS)) {
status = compositor->composite_boxes (dst, op, src, mask,
src_x, src_y,
mask_x, mask_y,
0, 0,
boxes, &extents->bounded);
cairo_surface_destroy (src);
} else
status = src->status;
cairo_surface_destroy (mask);
}
if (status == CAIRO_INT_STATUS_SUCCESS && ! extents->is_bounded)
status = fixup_unbounded_boxes (compositor, extents, boxes);
return status;
}
cairo_status_t
_cairo_surface_wrapper_show_text_glyphs (cairo_surface_wrapper_t *wrapper,
cairo_operator_t op,
const cairo_pattern_t *source,
const char *utf8,
int utf8_len,
const cairo_glyph_t *glyphs,
int num_glyphs,
const cairo_text_cluster_t *clusters,
int num_clusters,
cairo_text_cluster_flags_t cluster_flags,
cairo_scaled_font_t *scaled_font,
const cairo_clip_t *clip)
{
cairo_status_t status;
cairo_clip_t *dev_clip;
cairo_glyph_t stack_glyphs [CAIRO_STACK_ARRAY_LENGTH(cairo_glyph_t)];
cairo_glyph_t *dev_glyphs = stack_glyphs;
cairo_scaled_font_t *dev_scaled_font = scaled_font;
cairo_pattern_union_t source_copy;
cairo_font_options_t options;
if (unlikely (wrapper->target->status))
return wrapper->target->status;
dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip);
if (_cairo_clip_is_all_clipped (dev_clip))
return CAIRO_INT_STATUS_NOTHING_TO_DO;
cairo_surface_get_font_options (wrapper->target, &options);
cairo_font_options_merge (&options, &scaled_font->options);
if (wrapper->needs_transform) {
cairo_matrix_t m;
int i;
_cairo_surface_wrapper_get_transform (wrapper, &m);
if (! _cairo_matrix_is_translation (&wrapper->transform)) {
cairo_matrix_t ctm;
/* XXX No device-transform? A bug in the tangle of layers? */
_cairo_matrix_multiply (&ctm,
&wrapper->transform,
&scaled_font->ctm);
dev_scaled_font = cairo_scaled_font_create (scaled_font->font_face,
&scaled_font->font_matrix,
&ctm, &options);
}
if (num_glyphs > ARRAY_LENGTH (stack_glyphs)) {
dev_glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t));
if (unlikely (dev_glyphs == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FINISH;
}
}
for (i = 0; i < num_glyphs; i++) {
dev_glyphs[i] = glyphs[i];
cairo_matrix_transform_point (&m,
&dev_glyphs[i].x,
&dev_glyphs[i].y);
}
status = cairo_matrix_invert (&m);
assert (status == CAIRO_STATUS_SUCCESS);
_copy_transformed_pattern (&source_copy.base, source, &m);
source = &source_copy.base;
} else {
if (! cairo_font_options_equal (&options, &scaled_font->options)) {
dev_scaled_font = cairo_scaled_font_create (scaled_font->font_face,
&scaled_font->font_matrix,
&scaled_font->ctm,
&options);
}
/* show_text_glyphs is special because _cairo_surface_show_text_glyphs is allowed
* to modify the glyph array that's passed in. We must always
* copy the array before handing it to the backend.
*/
if (num_glyphs > ARRAY_LENGTH (stack_glyphs)) {
dev_glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t));
if (unlikely (dev_glyphs == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FINISH;
}
}
memcpy (dev_glyphs, glyphs, sizeof (cairo_glyph_t) * num_glyphs);
}
status = _cairo_surface_show_text_glyphs (wrapper->target, op, source,
utf8, utf8_len,
dev_glyphs, num_glyphs,
clusters, num_clusters,
cluster_flags,
dev_scaled_font,
dev_clip);
FINISH:
_cairo_clip_destroy (dev_clip);
if (dev_glyphs != stack_glyphs)
free (dev_glyphs);
if (dev_scaled_font != scaled_font)
cairo_scaled_font_destroy (dev_scaled_font);
return status;
}
void
_cairo_surface_clipper_reset (cairo_surface_clipper_t *clipper)
{
_cairo_clip_destroy (clipper->clip);
clipper->clip = NULL;
}
cairo_status_t
_cairo_gl_surface_draw_image (cairo_gl_surface_t *dst,
cairo_image_surface_t *src,
int src_x, int src_y,
int width, int height,
int dst_x, int dst_y)
{
GLenum internal_format, format, type;
cairo_bool_t has_alpha, needs_swap;
cairo_image_surface_t *clone = NULL;
cairo_gl_context_t *ctx;
int cpp;
cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS;
status = _cairo_gl_context_acquire (dst->base.device, &ctx);
if (unlikely (status))
return status;
if (! _cairo_gl_get_image_format_and_type (ctx->gl_flavor,
src->pixman_format,
&internal_format,
&format,
&type,
&has_alpha,
&needs_swap))
{
cairo_bool_t is_supported;
clone = _cairo_image_surface_coerce (src);
if (unlikely (status = clone->base.status))
goto FAIL;
is_supported =
_cairo_gl_get_image_format_and_type (ctx->gl_flavor,
clone->pixman_format,
&internal_format,
&format,
&type,
&has_alpha,
&needs_swap);
assert (is_supported);
assert (!needs_swap);
src = clone;
}
cpp = PIXMAN_FORMAT_BPP (src->pixman_format) / 8;
status = _cairo_gl_surface_flush (&dst->base);
if (unlikely (status))
goto FAIL;
if (_cairo_gl_surface_is_texture (dst)) {
void *data_start = src->data + src_y * src->stride + src_x * cpp;
void *data_start_gles2 = NULL;
/*
* Due to GL_UNPACK_ROW_LENGTH missing in GLES2 we have to extract the
* image data ourselves in some cases. In particular, we must extract
* the pixels if:
* a. we don't want full-length lines or
* b. the row stride cannot be handled by GL itself using a 4 byte
* alignment constraint
*/
if (ctx->gl_flavor == CAIRO_GL_FLAVOR_ES &&
(src->width * cpp < src->stride - 3 ||
width != src->width))
{
glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
status = _cairo_gl_surface_extract_image_data (src, src_x, src_y,
width, height,
&data_start_gles2);
if (unlikely (status))
goto FAIL;
data_start = data_start_gles2;
}
else
{
glPixelStorei (GL_UNPACK_ALIGNMENT, 4);
if (ctx->gl_flavor == CAIRO_GL_FLAVOR_DESKTOP)
glPixelStorei (GL_UNPACK_ROW_LENGTH, src->stride / cpp);
}
_cairo_gl_context_activate (ctx, CAIRO_GL_TEX_TEMP);
glBindTexture (ctx->tex_target, dst->tex);
glTexParameteri (ctx->tex_target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri (ctx->tex_target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexSubImage2D (ctx->tex_target, 0,
dst_x, dst_y, width, height,
format, type, data_start);
free (data_start_gles2);
/* If we just treated some rgb-only data as rgba, then we have to
* go back and fix up the alpha channel where we filled in this
* texture data.
*/
if (!has_alpha) {
_cairo_gl_surface_fill_alpha_channel (dst, ctx,
dst_x, dst_y,
width, height);
}
} else {
cairo_surface_t *tmp;
tmp = _cairo_gl_surface_create_scratch (ctx,
dst->base.content,
width, height);
if (unlikely (tmp->status))
goto FAIL;
status = _cairo_gl_surface_draw_image ((cairo_gl_surface_t *) tmp,
src,
src_x, src_y,
width, height,
0, 0);
if (status == CAIRO_INT_STATUS_SUCCESS) {
cairo_surface_pattern_t tmp_pattern;
cairo_rectangle_int_t r;
cairo_clip_t *clip;
_cairo_pattern_init_for_surface (&tmp_pattern, tmp);
cairo_matrix_init_translate (&tmp_pattern.base.matrix,
-dst_x, -dst_y);
tmp_pattern.base.filter = CAIRO_FILTER_NEAREST;
tmp_pattern.base.extend = CAIRO_EXTEND_NONE;
r.x = dst_x;
r.y = dst_y;
r.width = width;
r.height = height;
clip = _cairo_clip_intersect_rectangle (NULL, &r);
status = _cairo_surface_paint (&dst->base,
CAIRO_OPERATOR_SOURCE,
&tmp_pattern.base,
clip);
_cairo_clip_destroy (clip);
_cairo_pattern_fini (&tmp_pattern.base);
}
cairo_surface_destroy (tmp);
}
FAIL:
status = _cairo_gl_context_release (ctx, status);
if (clone)
cairo_surface_destroy (&clone->base);
return status;
}
static cairo_int_status_t
render_glyphs_via_mask (cairo_gl_surface_t *dst,
int dst_x, int dst_y,
cairo_operator_t op,
cairo_surface_t *source,
cairo_composite_glyphs_info_t *info,
cairo_clip_t *clip,
cairo_bool_t via_msaa_compositor)
{
cairo_surface_t *mask;
cairo_status_t status;
cairo_bool_t has_component_alpha;
TRACE ((stderr, "%s\n", __FUNCTION__));
/* XXX: For non-CA, this should be CAIRO_CONTENT_ALPHA to save memory */
mask = cairo_gl_surface_create (dst->base.device,
CAIRO_CONTENT_COLOR_ALPHA,
info->extents.width,
info->extents.height);
if (unlikely (mask->status))
return mask->status;
status = render_glyphs ((cairo_gl_surface_t *) mask,
info->extents.x, info->extents.y,
CAIRO_OPERATOR_ADD, NULL,
info, &has_component_alpha, NULL,
via_msaa_compositor);
if (likely (status == CAIRO_STATUS_SUCCESS)) {
cairo_surface_pattern_t mask_pattern;
cairo_surface_pattern_t source_pattern;
cairo_rectangle_int_t clip_extents;
mask->is_clear = FALSE;
_cairo_pattern_init_for_surface (&mask_pattern, mask);
mask_pattern.base.has_component_alpha = has_component_alpha;
mask_pattern.base.filter = CAIRO_FILTER_NEAREST;
mask_pattern.base.extend = CAIRO_EXTEND_NONE;
cairo_matrix_init_translate (&mask_pattern.base.matrix,
dst_x-info->extents.x, dst_y-info->extents.y);
_cairo_pattern_init_for_surface (&source_pattern, source);
cairo_matrix_init_translate (&source_pattern.base.matrix,
dst_x-info->extents.x, dst_y-info->extents.y);
clip = _cairo_clip_copy (clip);
clip_extents.x = info->extents.x - dst_x;
clip_extents.y = info->extents.y - dst_y;
clip_extents.width = info->extents.width;
clip_extents.height = info->extents.height;
clip = _cairo_clip_intersect_rectangle (clip, &clip_extents);
status = _cairo_surface_mask (&dst->base, op,
&source_pattern.base,
&mask_pattern.base,
clip);
_cairo_clip_destroy (clip);
_cairo_pattern_fini (&mask_pattern.base);
_cairo_pattern_fini (&source_pattern.base);
}
cairo_surface_destroy (mask);
return status;
}
static cairo_int_status_t
_cairo_spans_compositor_fill (const cairo_compositor_t *_compositor,
cairo_composite_rectangles_t *extents,
const cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias)
{
const cairo_spans_compositor_t *compositor = (cairo_spans_compositor_t*)_compositor;
cairo_int_status_t status;
TRACE((stderr, "%s op=%d, antialias=%d\n", __FUNCTION__, extents->op, antialias));
status = CAIRO_INT_STATUS_UNSUPPORTED;
if (_cairo_path_fixed_fill_is_rectilinear (path)) {
cairo_boxes_t boxes;
TRACE((stderr, "%s - rectilinear\n", __FUNCTION__));
_cairo_boxes_init (&boxes);
if (! _cairo_clip_contains_rectangle (extents->clip, &extents->mask))
_cairo_boxes_limit (&boxes,
extents->clip->boxes,
extents->clip->num_boxes);
status = _cairo_path_fixed_fill_rectilinear_to_boxes (path,
fill_rule,
antialias,
&boxes);
if (likely (status == CAIRO_INT_STATUS_SUCCESS))
status = clip_and_composite_boxes (compositor, extents, &boxes);
_cairo_boxes_fini (&boxes);
}
if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
cairo_polygon_t polygon;
TRACE((stderr, "%s - polygon\n", __FUNCTION__));
if (extents->mask.width > extents->unbounded.width ||
extents->mask.height > extents->unbounded.height)
{
cairo_box_t limits;
TRACE((stderr, "%s - clipping to bounds\n", __FUNCTION__));
_cairo_box_from_rectangle (&limits, &extents->unbounded);
_cairo_polygon_init (&polygon, &limits, 1);
}
else
{
_cairo_polygon_init (&polygon, NULL, 0);
}
status = _cairo_path_fixed_fill_to_polygon (path, tolerance, &polygon);
if (status == CAIRO_INT_STATUS_SUCCESS && extents->clip->num_boxes > 1) {
TRACE((stderr, "%s - polygon intersect with %d clip boxes\n",
__FUNCTION__, extents->clip->num_boxes));
status = _cairo_polygon_intersect_with_boxes (&polygon, &fill_rule,
extents->clip->boxes,
extents->clip->num_boxes);
}
if (likely (status == CAIRO_INT_STATUS_SUCCESS)) {
cairo_clip_t *saved_clip = extents->clip;
if (extents->is_bounded) {
TRACE((stderr, "%s - polygon discard clip boxes\n",
__FUNCTION__));
extents->clip = _cairo_clip_copy_path (extents->clip);
extents->clip = _cairo_clip_intersect_box(extents->clip,
&polygon.extents);
}
status = clip_and_composite_polygon (compositor, extents, &polygon,
fill_rule, antialias);
if (extents->is_bounded) {
_cairo_clip_destroy (extents->clip);
extents->clip = saved_clip;
}
}
_cairo_polygon_fini (&polygon);
TRACE((stderr, "%s - polygon status=%d\n", __FUNCTION__, status));
}
return status;
}
