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115 lines
5.2 KiB
C
115 lines
5.2 KiB
C
#ifndef __GSK_RENDER_NODE_PRIVATE_H__
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#define __GSK_RENDER_NODE_PRIVATE_H__
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#include "gskrendernode.h"
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#include <cairo.h>
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G_BEGIN_DECLS
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/*<private>
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* GskMatrixCategory:
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* @GSK_MATRIX_CATEGORY_UNKNOWN: The category of the matrix has not been
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* determined.
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* @GSK_MATRIX_CATEGORY_ANY: Analyzing the matrix concluded that it does
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* not fit in any other category.
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* @GSK_MATRIX_CATEGORY_INVERTIBLE: The matrix is linear independant and
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* should therefor be invertible. Note that this is not guaranteed
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* to actually be true due to rounding errors when inverting.
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* @GSK_MATRIX_CATEGORY_2D: The matrix is a 2D matrix. This is equivalent
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* to graphene_matrix_is_2d() returning %TRUE. In particular, this
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* means that Cairo can deal with the matrix.
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* @GSK_MATRIX_CATEGORY_2D_AFFINE: The matrix is a combination of 2D scale
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* and 2D translation operations. In particular, this means that any
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* rectangle can be transformed exactly using this matrix.
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* @GSK_MATRIX_CATEGORY_2D_TRANSLATE: The matrix is a 2D translation.
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* @GSK_MATRIX_CATEGORY_IDENTITY: The matrix is the identity matrix.
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*
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* The categories of matrices relevant for GSK and GTK. Note that any
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* category includes matrices of all later categories. So if you want
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* to for example check if a matrix is a 2D matrix,
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* `category >= GSK_MATRIX_CATEGORY_2D` is the way to do this.
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*
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* Also keep in mind that rounding errors may cause matrices to not
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* conform to their categories. Otherwise, matrix operations done via
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* mutliplication will not worsen categories. So for the matrix
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* multiplication `C = A * B`, `category(C) = MIN (category(A), category(B))`.
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*/
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typedef enum
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{
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GSK_MATRIX_CATEGORY_UNKNOWN,
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GSK_MATRIX_CATEGORY_ANY,
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GSK_MATRIX_CATEGORY_INVERTIBLE,
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GSK_MATRIX_CATEGORY_2D_AFFINE,
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GSK_MATRIX_CATEGORY_2D_TRANSLATE,
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GSK_MATRIX_CATEGORY_IDENTITY
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} GskMatrixCategory;
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typedef struct _GskRenderNodeClass GskRenderNodeClass;
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#define GSK_IS_RENDER_NODE_TYPE(node,type) (GSK_IS_RENDER_NODE (node) && (node)->node_class->node_type == (type))
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struct _GskRenderNode
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{
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const GskRenderNodeClass *node_class;
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volatile int ref_count;
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graphene_rect_t bounds;
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};
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struct _GskRenderNodeClass
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{
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GskRenderNodeType node_type;
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gsize struct_size;
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const char *type_name;
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void (* finalize) (GskRenderNode *node);
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void (* draw) (GskRenderNode *node,
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cairo_t *cr);
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gboolean (* can_diff) (GskRenderNode *node1,
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GskRenderNode *node2);
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void (* diff) (GskRenderNode *node1,
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GskRenderNode *node2,
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cairo_region_t *region);
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GVariant * (* serialize) (GskRenderNode *node);
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GskRenderNode * (* deserialize) (GVariant *variant,
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GError **error);
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};
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GskRenderNode * gsk_render_node_new (const GskRenderNodeClass *node_class,
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gsize extra_size);
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gboolean gsk_render_node_can_diff (GskRenderNode *node1,
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GskRenderNode *node2);
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void gsk_render_node_diff (GskRenderNode *node1,
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GskRenderNode *node2,
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cairo_region_t *region);
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void gsk_render_node_diff_impossible (GskRenderNode *node1,
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GskRenderNode *node2,
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cairo_region_t *region);
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GVariant * gsk_render_node_serialize_node (GskRenderNode *node);
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GskRenderNode * gsk_render_node_deserialize_node (GskRenderNodeType type,
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GVariant *variant,
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GError **error);
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GskRenderNode * gsk_cairo_node_new_for_surface (const graphene_rect_t *bounds,
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cairo_surface_t *surface);
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GskRenderNode * gsk_transform_node_new_with_category (GskRenderNode *child,
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const graphene_matrix_t *transform,
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GskMatrixCategory category);
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GskMatrixCategory gsk_transform_node_get_category (GskRenderNode *node);
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GskRenderNode * gsk_text_node_new_with_bounds (PangoFont *font,
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PangoGlyphString *glyphs,
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const GdkRGBA *color,
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double x,
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double y,
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const graphene_rect_t *bounds);
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G_END_DECLS
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#endif /* __GSK_RENDER_NODE_PRIVATE_H__ */
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