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13d943f763
A problem with textures is that they can become too big for GPU memory, which would require tiling. But for tiling we only need to download the pixels needed by the tile. Similarly, there might be interest to not upload full textures if a renderer knows it only needs a small part. Both of these methods require the ability to specify an area of the texture to be downloaded. So change the download vfunc to include this parameter now before we add even more textures later. A private gdk_texture_download_area() function has also been added, but nobody is using it yet.
55 lines
2.5 KiB
C
55 lines
2.5 KiB
C
#ifndef __GDK_TEXTURE_PRIVATE_H__
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#define __GDK_TEXTURE_PRIVATE_H__
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#include "gdktexture.h"
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G_BEGIN_DECLS
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#define GDK_TEXTURE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_TEXTURE, GdkTextureClass))
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#define GDK_IS_TEXTURE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_TEXTURE))
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#define GDK_TEXTURE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_TEXTURE, GdkTextureClass))
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struct _GdkTexture
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{
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GObject parent_instance;
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int width;
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int height;
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gpointer render_key;
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gpointer render_data;
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GDestroyNotify render_notify;
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};
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struct _GdkTextureClass {
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GObjectClass parent_class;
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void (* download) (GdkTexture *texture,
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const GdkRectangle *area,
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guchar *data,
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gsize stride);
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cairo_surface_t * (* download_surface) (GdkTexture *texture);
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};
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gpointer gdk_texture_new (const GdkTextureClass *klass,
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int width,
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int height);
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GdkTexture * gdk_texture_new_for_surface (cairo_surface_t *surface);
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cairo_surface_t * gdk_texture_download_surface (GdkTexture *texture);
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void gdk_texture_download_area (GdkTexture *texture,
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const GdkRectangle *area,
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guchar *data,
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gsize stride);
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gboolean gdk_texture_set_render_data (GdkTexture *self,
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gpointer key,
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gpointer data,
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GDestroyNotify notify);
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void gdk_texture_clear_render_data (GdkTexture *self);
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gpointer gdk_texture_get_render_data (GdkTexture *self,
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gpointer key);
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G_END_DECLS
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#endif /* __GDK_TEXTURE_PRIVATE_H__ */
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