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gsk: Allocate a white 1px texture target

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This allows us to efficiently render things like solid colors.
This commit is contained in:
Emmanuele Bassi
2016-11-16 17:30:59 +00:00
parent 54fe34f94a
commit cd2c20251e
2 changed files with 28 additions and 0 deletions
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26
gsk/gskgldriver.c
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@@ -42,6 +42,8 @@ struct _GskGLDriver
Fbo default_fbo;
Texture white_texture;
GHashTable *textures;
GHashTable *vaos;
@@ -219,6 +221,22 @@ gsk_gl_driver_begin_frame (GskGLDriver *driver)
GSK_NOTE (OPENGL, g_print ("GL max texture size: %d\n", driver->max_texture_size));
}
if (driver->white_texture.texture_id == 0)
{
const float white_pixel[4] = { 1, 1, 1, 1, };
glGenTextures (1, &(driver->white_texture.texture_id));
driver->white_texture.width = 1;
driver->white_texture.height = 1;
driver->white_texture.min_filter = GL_NEAREST;
driver->white_texture.mag_filter = GL_NEAREST;
driver->white_texture.in_use = TRUE;
glBindTexture (GL_TEXTURE_2D, driver->white_texture.texture_id);
glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_FLOAT, white_pixel);
}
glGetIntegerv (GL_FRAMEBUFFER_BINDING, (GLint *) &(driver->default_fbo.fbo_id));
driver->bound_fbo = &driver->default_fbo;
@@ -848,3 +866,11 @@ gsk_gl_driver_init_texture_with_surface (GskGLDriver *driver,
glBindTexture (GL_TEXTURE_2D, 0);
}
int
gsk_gl_driver_get_white_texture (GskGLDriver *driver)
{
g_return_val_if_fail (GSK_IS_GL_DRIVER (driver), -1);
return driver->white_texture.texture_id;
}

2
gsk/gskgldriverprivate.h
View File

@@ -67,6 +67,8 @@ void gsk_gl_driver_destroy_vao (GskGLDriver *driver
int gsk_gl_driver_collect_textures (GskGLDriver *driver);
int gsk_gl_driver_collect_vaos (GskGLDriver *driver);
int gsk_gl_driver_get_white_texture (GskGLDriver *driver);
G_END_DECLS
#endif /* __GSK_GL_DRIVER_PRIVATE_H__ */