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Support foreign textures in the texture-2d and rectangle backends

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This adds two new internal functions to create a foreign texture for
the texture 2d and rectangle backends. cogl_texture_new_from_foreign
will now use one of these backends directly if there is no waste
instead of always using the sliced texture backend.
This commit is contained in:
Neil Roberts
2010-10-04 15:27:38 +01:00
parent c6977cdb13
commit b540dcb75a
5 changed files with 287 additions and 22 deletions
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118
cogl/cogl-texture-rectangle.c
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@ -167,7 +167,7 @@ _cogl_texture_rectangle_set_wrap_mode_parameters (CoglTexture *tex,
GE( _cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE) );
tex_rect->is_foreign) );
GE( glTexParameteri (GL_TEXTURE_RECTANGLE_ARB,
GL_TEXTURE_WRAP_S, wrap_mode_s) );
GE( glTexParameteri (GL_TEXTURE_RECTANGLE_ARB,
@ -181,7 +181,8 @@ _cogl_texture_rectangle_set_wrap_mode_parameters (CoglTexture *tex,
static void
_cogl_texture_rectangle_free (CoglTextureRectangle *tex_rect)
{
_cogl_delete_gl_texture (tex_rect->gl_texture);
if (!tex_rect->is_foreign)
_cogl_delete_gl_texture (tex_rect->gl_texture);
/* Chain up */
_cogl_texture_free (COGL_TEXTURE (tex_rect));
@ -270,7 +271,7 @@ _cogl_texture_rectangle_new_with_size (unsigned int width,
_cogl_texture_driver_gen (GL_TEXTURE_RECTANGLE_ARB, 1, &tex_rect->gl_texture);
GE( _cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE) );
tex_rect->is_foreign) );
GE( glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, gl_intformat,
width, height, 0, gl_format, gl_type, NULL) );
@ -330,6 +331,105 @@ _cogl_texture_rectangle_new_from_bitmap (CoglBitmap *bmp,
return _cogl_texture_rectangle_handle_new (tex_rect);
}
CoglHandle
_cogl_texture_rectangle_new_from_foreign (GLuint gl_handle,
GLuint width,
GLuint height,
CoglPixelFormat format)
{
/* NOTE: width, height and internal format are not queriable
* in GLES, hence such a function prototype.
*/
GLenum gl_error = 0;
GLint gl_compressed = GL_FALSE;
GLenum gl_int_format = 0;
CoglTextureRectangle *tex_rect;
if (!_cogl_texture_driver_allows_foreign_gl_target (GL_TEXTURE_RECTANGLE_ARB))
return COGL_INVALID_HANDLE;
/* Make sure it is a valid GL texture object */
if (!glIsTexture (gl_handle))
return COGL_INVALID_HANDLE;
/* Make sure binding succeeds */
while ((gl_error = glGetError ()) != GL_NO_ERROR)
;
_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB, gl_handle, TRUE);
if (glGetError () != GL_NO_ERROR)
return COGL_INVALID_HANDLE;
/* Obtain texture parameters */
#if HAVE_COGL_GL
GE( glGetTexLevelParameteriv (GL_TEXTURE_RECTANGLE_ARB, 0,
GL_TEXTURE_COMPRESSED,
&gl_compressed) );
{
GLint val;
GE( glGetTexLevelParameteriv (GL_TEXTURE_RECTANGLE_ARB, 0,
GL_TEXTURE_INTERNAL_FORMAT,
&val) );
gl_int_format = val;
}
/* If we can query GL for the actual pixel format then we'll ignore
the passed in format and use that. */
if (!_cogl_pixel_format_from_gl_internal (gl_int_format, &format))
return COGL_INVALID_HANDLE;
#else
/* Otherwise we'll assume we can derive the GL format from the
passed in format */
_cogl_pixel_format_to_gl (format,
&gl_int_format,
NULL,
NULL);
#endif
/* Note: We always trust the given width and height without querying
* the texture object because the user may be creating a Cogl
* texture for a texture_from_pixmap object where glTexImage2D may
* not have been called and the texture_from_pixmap spec doesn't
* clarify that it is reliable to query back the size from OpenGL.
*/
/* Validate width and height */
if (width <= 0 || height <= 0)
return COGL_INVALID_HANDLE;
/* Compressed texture images not supported */
if (gl_compressed == GL_TRUE)
return COGL_INVALID_HANDLE;
/* Create new texture */
tex_rect = _cogl_texture_rectangle_create_base (width, height,
COGL_TEXTURE_NO_AUTO_MIPMAP,
format);
/* Setup bitmap info */
tex_rect->is_foreign = TRUE;
tex_rect->format = format;
tex_rect->gl_texture = gl_handle;
tex_rect->gl_format = gl_int_format;
/* Unknown filter */
tex_rect->min_filter = GL_FALSE;
tex_rect->mag_filter = GL_FALSE;
return _cogl_texture_rectangle_handle_new (tex_rect);
}
static int
_cogl_texture_rectangle_get_max_waste (CoglTexture *tex)
{
@ -415,7 +515,7 @@ _cogl_texture_rectangle_set_filters (CoglTexture *tex,
/* Apply new filters to the texture */
GE( _cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE) );
tex_rect->is_foreign) );
GE( glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
mag_filter) );
GE( glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
@ -493,7 +593,7 @@ _cogl_texture_rectangle_get_data (CoglTexture *tex,
GE( _cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
tex_rect->gl_texture,
FALSE) );
tex_rect->is_foreign) );
return _cogl_texture_driver_gl_get_tex_image (GL_TEXTURE_RECTANGLE_ARB,
gl_format,
gl_type,
@ -524,6 +624,12 @@ _cogl_texture_rectangle_get_height (CoglTexture *tex)
return COGL_TEXTURE_RECTANGLE (tex)->height;
}
static gboolean
_cogl_texture_rectangle_is_foreign (CoglTexture *tex)
{
return COGL_TEXTURE_RECTANGLE (tex)->is_foreign;
}
static const CoglTextureVtable
cogl_texture_rectangle_vtable =
{
@ -544,5 +650,5 @@ cogl_texture_rectangle_vtable =
_cogl_texture_rectangle_get_gl_format,
_cogl_texture_rectangle_get_width,
_cogl_texture_rectangle_get_height,
NULL /* is_foreign */
_cogl_texture_rectangle_is_foreign
};