gdk: Add a gl texture implementation

This will be used to pass a GL textures from the application
(or rather, GtkGLArea) down to the GSK GL renderer.
This commit is contained in:
Matthias Clasen 2018-01-17 00:32:26 -05:00
parent e7cab2bc0c
commit b366ea84a7
3 changed files with 125 additions and 0 deletions

View File

@ -39,6 +39,8 @@
#include "gdkinternals.h"
#include "gdkcairo.h"
#include <epoxy/gl.h>
/**
* SECTION:gdktexture
* @Short_description: Image data for display
@ -432,6 +434,88 @@ gdk_pixbuf_texture_init (GdkPixbufTexture *self)
{
}
/* GdkGLTexture */
struct _GdkGLTexture {
GdkTexture parent_instance;
GdkGLContext *context;
int id;
GDestroyNotify destroy;
gpointer data;
};
struct _GdkGLTextureClass {
GdkTextureClass parent_class;
};
G_DEFINE_TYPE (GdkGLTexture, gdk_gl_texture, GDK_TYPE_TEXTURE)
static void
gdk_gl_texture_dispose (GObject *object)
{
GdkGLTexture *self = GDK_GL_TEXTURE (object);
g_object_unref (self->context);
if (self->destroy)
self->destroy (self->data);
G_OBJECT_CLASS (gdk_gl_texture_parent_class)->dispose (object);
}
static void
gdk_gl_texture_download (GdkTexture *texture,
guchar *data,
gsize stride)
{
GdkGLTexture *self = GDK_GL_TEXTURE (texture);
cairo_surface_t *surface;
cairo_t *cr;
GdkWindow *window;
surface = cairo_image_surface_create_for_data (data,
CAIRO_FORMAT_ARGB32,
texture->width, texture->height,
stride);
cr = cairo_create (surface);
window = gdk_gl_context_get_window (self->context);
gdk_cairo_draw_from_gl (cr, window, self->id, GL_TEXTURE, 1, 0, 0, texture->width, texture->height);
cairo_destroy (cr);
cairo_surface_finish (surface);
cairo_surface_destroy (surface);
}
static void
gdk_gl_texture_class_init (GdkGLTextureClass *klass)
{
GdkTextureClass *texture_class = GDK_TEXTURE_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
texture_class->download = gdk_gl_texture_download;
gobject_class->dispose = gdk_gl_texture_dispose;
}
static void
gdk_gl_texture_init (GdkGLTexture *self)
{
}
GdkGLContext *
gdk_gl_texture_get_context (GdkGLTexture *self)
{
return self->context;
}
int
gdk_gl_texture_get_id (GdkGLTexture *self)
{
return self->id;
}
/**
* gdk_texture_new_for_pixbuf:
* @pixbuf: a #GdkPixbuf
@ -532,6 +616,31 @@ gdk_texture_new_from_file (GFile *file,
return texture;
}
GdkTexture *
gdk_texture_new_for_gl (GdkGLContext *context,
int id,
int width,
int height,
GDestroyNotify destroy,
gpointer data)
{
GdkGLTexture *self;
g_return_val_if_fail (GDK_IS_GL_CONTEXT (context), NULL);
self = g_object_new (GDK_TYPE_GL_TEXTURE,
"width", width,
"height", height,
NULL);
self->context = g_object_ref (context);
self->id = id;
self->destroy = destroy;
self->data = data;
return GDK_TEXTURE (self);
}
/**
* gdk_texture_get_width:
* @texture: a #GdkTexture

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@ -26,6 +26,7 @@
#include <gdk/gdkversionmacros.h>
#include <gdk/gdktypes.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gdk/gdkglcontext.h>
G_BEGIN_DECLS
@ -55,6 +56,14 @@ GDK_AVAILABLE_IN_3_94
GdkTexture * gdk_texture_new_from_file (GFile *file,
GError **error);
GDK_AVAILABLE_IN_3_94
GdkTexture * gdk_texture_new_for_gl (GdkGLContext *context,
int id,
int width,
int height,
GDestroyNotify destroy,
gpointer data);
GDK_AVAILABLE_IN_3_94
int gdk_texture_get_width (GdkTexture *texture);
GDK_AVAILABLE_IN_3_94

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@ -44,6 +44,13 @@ void gdk_texture_clear_render_data (GdkTexture
gpointer gdk_texture_get_render_data (GdkTexture *self,
gpointer key);
#define GDK_TYPE_GL_TEXTURE (gdk_gl_texture_get_type ())
G_DECLARE_FINAL_TYPE (GdkGLTexture, gdk_gl_texture, GDK, GL_TEXTURE, GdkTexture)
GdkGLContext * gdk_gl_texture_get_context (GdkGLTexture *self);
int gdk_gl_texture_get_id (GdkGLTexture *self);
G_END_DECLS
#endif /* __GDK_TEXTURE_PRIVATE_H__ */