void
_cairo_path_fixed_init (cairo_path_fixed_t *path)
{
VG (VALGRIND_MAKE_MEM_UNDEFINED (path, sizeof (cairo_path_fixed_t)));
cairo_list_init (&path->buf.base.link);
path->buf.base.num_ops = 0;
path->buf.base.num_points = 0;
path->buf.base.size_ops = ARRAY_LENGTH (path->buf.op);
path->buf.base.size_points = ARRAY_LENGTH (path->buf.points);
path->buf.base.op = path->buf.op;
path->buf.base.points = path->buf.points;
path->current_point.x = 0;
path->current_point.y = 0;
path->last_move_point = path->current_point;
path->has_last_move_point = FALSE;
path->has_current_point = FALSE;
path->has_curve_to = FALSE;
path->is_rectilinear = TRUE;
path->maybe_fill_region = TRUE;
path->is_empty_fill = TRUE;
path->extents.p1.x = path->extents.p1.y = INT_MAX;
path->extents.p2.x = path->extents.p2.y = INT_MIN;
}
cairo_status_t
_cairo_gl_context_init (cairo_gl_context_t *ctx)
{
cairo_status_t status;
cairo_gl_dispatch_t *dispatch = &ctx->dispatch;
int gl_version = _cairo_gl_get_version ();
cairo_gl_flavor_t gl_flavor = _cairo_gl_get_flavor ();
int n;
_cairo_device_init (&ctx->base, &_cairo_gl_device_backend);
/* XXX The choice of compositor should be made automatically at runtime.
* However, it is useful to force one particular compositor whilst
* testing.
*/
if (_cairo_gl_msaa_compositor_enabled ())
ctx->compositor = _cairo_gl_msaa_compositor_get ();
else
ctx->compositor = _cairo_gl_span_compositor_get ();
ctx->thread_aware = TRUE;
memset (ctx->glyph_cache, 0, sizeof (ctx->glyph_cache));
cairo_list_init (&ctx->fonts);
/* Support only GL version >= 1.3 */
if (gl_version < CAIRO_GL_VERSION_ENCODE (1, 3))
return _cairo_error (CAIRO_STATUS_DEVICE_ERROR);
/* Check for required extensions */
if (gl_flavor == CAIRO_GL_FLAVOR_DESKTOP) {
if (_cairo_gl_has_extension ("GL_ARB_texture_non_power_of_two")) {
ctx->tex_target = GL_TEXTURE_2D;
ctx->has_npot_repeat = TRUE;
} else if (_cairo_gl_has_extension ("GL_ARB_texture_rectangle")) {
ctx->tex_target = GL_TEXTURE_RECTANGLE;
ctx->has_npot_repeat = FALSE;
} else
return _cairo_error (CAIRO_STATUS_DEVICE_ERROR);
} else {
ctx->tex_target = GL_TEXTURE_2D;
if (_cairo_gl_has_extension ("GL_OES_texture_npot"))
ctx->has_npot_repeat = TRUE;
else
ctx->has_npot_repeat = FALSE;
}
if (gl_flavor == CAIRO_GL_FLAVOR_DESKTOP &&
gl_version < CAIRO_GL_VERSION_ENCODE (2, 1) &&
! _cairo_gl_has_extension ("GL_ARB_pixel_buffer_object"))
return _cairo_error (CAIRO_STATUS_DEVICE_ERROR);
if (gl_flavor == CAIRO_GL_FLAVOR_ES &&
! _cairo_gl_has_extension ("GL_EXT_texture_format_BGRA8888"))
return _cairo_error (CAIRO_STATUS_DEVICE_ERROR);
ctx->has_map_buffer = (gl_flavor == CAIRO_GL_FLAVOR_DESKTOP ||
(gl_flavor == CAIRO_GL_FLAVOR_ES &&
_cairo_gl_has_extension ("GL_OES_mapbuffer")));
ctx->has_mesa_pack_invert =
_cairo_gl_has_extension ("GL_MESA_pack_invert");
ctx->has_packed_depth_stencil =
((gl_flavor == CAIRO_GL_FLAVOR_DESKTOP &&
_cairo_gl_has_extension ("GL_EXT_packed_depth_stencil")) ||
(gl_flavor == CAIRO_GL_FLAVOR_ES &&
_cairo_gl_has_extension ("GL_OES_packed_depth_stencil")));
ctx->num_samples = 1;
#if CAIRO_HAS_GL_SURFACE
if (ctx->has_packed_depth_stencil &&
_cairo_gl_has_extension ("GL_ARB_framebuffer_object")) {
glGetIntegerv(GL_MAX_SAMPLES_EXT, &ctx->num_samples);
}
#endif
#if CAIRO_HAS_GLESV2_SURFACE && defined(GL_MAX_SAMPLES_EXT)
if (ctx->has_packed_depth_stencil &&
_cairo_gl_has_extension ("GL_EXT_multisampled_render_to_texture")) {
glGetIntegerv(GL_MAX_SAMPLES_EXT, &ctx->num_samples);
}
#endif
ctx->supports_msaa = ctx->num_samples > 1;
if (ctx->num_samples > MAX_MSAA_SAMPLES)
ctx->num_samples = MAX_MSAA_SAMPLES;
ctx->current_operator = -1;
ctx->gl_flavor = gl_flavor;
status = _cairo_gl_context_init_shaders (ctx);
if (unlikely (status))
return status;
status = _cairo_cache_init (&ctx->gradients,
_cairo_gl_gradient_equal,
NULL,
(cairo_destroy_func_t) _cairo_gl_gradient_destroy,
CAIRO_GL_GRADIENT_CACHE_SIZE);
if (unlikely (status))
return status;
ctx->vb = malloc (CAIRO_GL_VBO_SIZE);
if (unlikely (ctx->vb == NULL)) {
_cairo_cache_fini (&ctx->gradients);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
ctx->primitive_type = CAIRO_GL_PRIMITIVE_TYPE_TRIANGLES;
_cairo_array_init (&ctx->tristrip_indices, sizeof (unsigned short));
/* PBO for any sort of texture upload */
dispatch->GenBuffers (1, &ctx->texture_load_pbo);
ctx->max_framebuffer_size = 0;
glGetIntegerv (GL_MAX_RENDERBUFFER_SIZE, &ctx->max_framebuffer_size);
ctx->max_texture_size = 0;
glGetIntegerv (GL_MAX_TEXTURE_SIZE, &ctx->max_texture_size);
ctx->max_textures = 0;
glGetIntegerv (GL_MAX_TEXTURE_IMAGE_UNITS, &ctx->max_textures);
for (n = 0; n < ARRAY_LENGTH (ctx->glyph_cache); n++)
_cairo_gl_glyph_cache_init (&ctx->glyph_cache[n]);
return CAIRO_STATUS_SUCCESS;
}
cairo_status_t
_cairo_path_fixed_init_copy (cairo_path_fixed_t *path,
const cairo_path_fixed_t *other)
{
cairo_path_buf_t *buf, *other_buf;
unsigned int num_points, num_ops;
VG (VALGRIND_MAKE_MEM_UNDEFINED (path, sizeof (cairo_path_fixed_t)));
cairo_list_init (&path->buf.base.link);
path->buf.base.op = path->buf.op;
path->buf.base.points = path->buf.points;
path->buf.base.size_ops = ARRAY_LENGTH (path->buf.op);
path->buf.base.size_points = ARRAY_LENGTH (path->buf.points);
path->current_point = other->current_point;
path->last_move_point = other->last_move_point;
path->has_last_move_point = other->has_last_move_point;
path->has_current_point = other->has_current_point;
path->has_curve_to = other->has_curve_to;
path->is_rectilinear = other->is_rectilinear;
path->maybe_fill_region = other->maybe_fill_region;
path->is_empty_fill = other->is_empty_fill;
path->extents = other->extents;
path->buf.base.num_ops = other->buf.base.num_ops;
path->buf.base.num_points = other->buf.base.num_points;
memcpy (path->buf.op, other->buf.base.op,
other->buf.base.num_ops * sizeof (other->buf.op[0]));
memcpy (path->buf.points, other->buf.points,
other->buf.base.num_points * sizeof (other->buf.points[0]));
num_points = num_ops = 0;
for (other_buf = cairo_path_buf_next (cairo_path_head (other));
other_buf != cairo_path_head (other);
other_buf = cairo_path_buf_next (other_buf))
{
num_ops += other_buf->num_ops;
num_points += other_buf->num_points;
}
if (num_ops) {
buf = _cairo_path_buf_create (num_ops, num_points);
if (unlikely (buf == NULL)) {
_cairo_path_fixed_fini (path);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
for (other_buf = cairo_path_buf_next (cairo_path_head (other));
other_buf != cairo_path_head (other);
other_buf = cairo_path_buf_next (other_buf))
{
memcpy (buf->op + buf->num_ops, other_buf->op,
other_buf->num_ops * sizeof (buf->op[0]));
buf->num_ops += other_buf->num_ops;
memcpy (buf->points + buf->num_points, other_buf->points,
other_buf->num_points * sizeof (buf->points[0]));
buf->num_points += other_buf->num_points;
}
_cairo_path_fixed_add_buf (path, buf);
}
return CAIRO_STATUS_SUCCESS;
}
