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A GskGLShader is an abstraction of a GLSL fragment shader that can produce pixel values given inputs: * N (currently max 4) textures * Current arguments for the shader uniform Uniform types are: float,(u)int,bool,vec234) There is also a builder for the uniform arguments which are passed around as immutable GBytes in the built form. A GskGLShaderNode is a render node that renders a GskGLShader inside a specified rectangular bounds. It renders its child nodes as textures and passes those as texture arguments to the shader. You also pass it a uniform arguments object.
102 lines
4.0 KiB
C
102 lines
4.0 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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typedef struct _GskRenderNodeClass GskRenderNodeClass;
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/* Keep this in sync with the GskRenderNodeType enumeration.
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*
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* We don't add an "n-types" value to avoid having to handle
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* it in every single switch.
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*/
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#define GSK_RENDER_NODE_TYPE_N_TYPES (GSK_GL_SHADER_NODE + 1)
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extern GType gsk_render_node_types[];
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#define GSK_IS_RENDER_NODE_TYPE(node,type) \
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(G_TYPE_INSTANCE_GET_CLASS ((node), GSK_TYPE_RENDER_NODE, GskRenderNodeClass)->node_type == (type))
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struct _GskRenderNode
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{
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GTypeInstance parent_instance;
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gatomicrefcount 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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GTypeClass parent_class;
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GskRenderNodeType node_type;
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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) (const GskRenderNode *node1,
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const 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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};
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/*< private >
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* GskRenderNodeTypeInfo:
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* @node_type: the render node type in the #GskRenderNodeType enumeration
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* @instance_size: the size of the render node instance
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* @instance_init: (nullable): the instance initialization function
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* @finalize: (nullable): the instance finalization function; must chain up to the
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* implementation of the parent class
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* @draw: the function called by gsk_render_node_draw()
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* @can_diff: (nullable): the function called by gsk_render_node_can_diff(); if
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* unset, gsk_render_node_can_diff_true() will be used
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* @diff: (nullable): the function called by gsk_render_node_diff(); if unset,
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* gsk_render_node_diff_impossible() will be used
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*
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* A struction that contains the type information for a #GskRenderNode subclass,
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* to be used by gsk_render_node_type_register_static().
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*/
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typedef struct
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{
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GskRenderNodeType node_type;
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gsize instance_size;
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void (* instance_init) (GskRenderNode *node);
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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) (const GskRenderNode *node1,
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const 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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} GskRenderNodeTypeInfo;
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void gsk_render_node_init_types (void);
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GType gsk_render_node_type_register_static (const char *node_name,
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const GskRenderNodeTypeInfo *node_info);
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gpointer gsk_render_node_alloc (GskRenderNodeType node_type);
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gboolean gsk_render_node_can_diff (const GskRenderNode *node1,
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const GskRenderNode *node2) G_GNUC_PURE;
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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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bool gsk_border_node_get_uniform (GskRenderNode *self);
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G_END_DECLS
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#endif /* __GSK_RENDER_NODE_PRIVATE_H__ */
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