static CoglBool
recreate_store (CoglBuffer *buffer,
CoglError **error)
{
CoglContext *ctx = buffer->context;
GLenum gl_target;
GLenum gl_enum;
GLenum gl_error;
/* This assumes the buffer is already bound */
gl_target = convert_bind_target_to_gl_target (buffer->last_target);
gl_enum = update_hints_to_gl_enum (buffer);
/* Clear any GL errors */
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
;
ctx->glBufferData (gl_target,
buffer->size,
NULL,
gl_enum);
if (_cogl_gl_util_catch_out_of_memory (ctx, error))
return FALSE;
buffer->store_created = TRUE;
return TRUE;
}
CoglBool
_cogl_buffer_gl_set_data (CoglBuffer *buffer,
unsigned int offset,
const void *data,
unsigned int size,
CoglError **error)
{
CoglBufferBindTarget target;
GLenum gl_target;
CoglContext *ctx = buffer->context;
GLenum gl_error;
CoglBool status = TRUE;
CoglError *internal_error = NULL;
target = buffer->last_target;
_cogl_buffer_gl_bind (buffer, target, &internal_error);
/* NB: _cogl_buffer_gl_bind() may return NULL in non-error
* conditions so we have to explicity check internal_error
* to see if an exception was thrown.
*/
if (internal_error)
{
_cogl_propagate_error (error, internal_error);
return FALSE;
}
gl_target = convert_bind_target_to_gl_target (target);
/* Clear any GL errors */
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
;
ctx->glBufferSubData (gl_target, offset, size, data);
if (_cogl_gl_util_catch_out_of_memory (ctx, error))
status = FALSE;
_cogl_buffer_gl_unbind (buffer);
return status;
}
void *
_cogl_buffer_gl_map_range (CoglBuffer *buffer,
size_t offset,
size_t size,
CoglBufferAccess access,
CoglBufferMapHint hints,
CoglError **error)
{
uint8_t *data;
CoglBufferBindTarget target;
GLenum gl_target;
CoglContext *ctx = buffer->context;
GLenum gl_error;
if (((access & COGL_BUFFER_ACCESS_READ) &&
!cogl_has_feature (ctx, COGL_FEATURE_ID_MAP_BUFFER_FOR_READ)) ||
((access & COGL_BUFFER_ACCESS_WRITE) &&
!cogl_has_feature (ctx, COGL_FEATURE_ID_MAP_BUFFER_FOR_WRITE)))
{
_cogl_set_error (error,
COGL_SYSTEM_ERROR,
COGL_SYSTEM_ERROR_UNSUPPORTED,
"Tried to map a buffer with unsupported access mode");
return NULL;
}
target = buffer->last_target;
_cogl_buffer_bind_no_create (buffer, target);
gl_target = convert_bind_target_to_gl_target (target);
if ((hints & COGL_BUFFER_MAP_HINT_DISCARD_RANGE) &&
offset == 0 && size >= buffer->size)
hints |= COGL_BUFFER_MAP_HINT_DISCARD;
/* If the map buffer range extension is supported then we will
* always use it even if we are mapping the full range because the
* normal mapping function doesn't support passing the discard
* hints */
if (ctx->glMapBufferRange)
{
GLbitfield gl_access = 0;
CoglBool should_recreate_store = !buffer->store_created;
if ((access & COGL_BUFFER_ACCESS_READ))
gl_access |= GL_MAP_READ_BIT;
if ((access & COGL_BUFFER_ACCESS_WRITE))
gl_access |= GL_MAP_WRITE_BIT;
if ((hints & COGL_BUFFER_MAP_HINT_DISCARD))
{
/* glMapBufferRange generates an error if you pass the
* discard hint along with asking for read access. However
* it can make sense to ask for both if write access is also
* requested so that the application can immediately read
* back what it just wrote. To work around the restriction
* in GL we just recreate the buffer storage in that case
* which is an alternative way to indicate that the buffer
* contents can be discarded. */
if ((access & COGL_BUFFER_ACCESS_READ))
should_recreate_store = TRUE;
else
gl_access |= GL_MAP_INVALIDATE_BUFFER_BIT;
}
else if ((hints & COGL_BUFFER_MAP_HINT_DISCARD_RANGE) &&
!(access & COGL_BUFFER_ACCESS_READ))
gl_access |= GL_MAP_INVALIDATE_RANGE_BIT;
if (should_recreate_store)
{
if (!recreate_store (buffer, error))
{
_cogl_buffer_gl_unbind (buffer);
return NULL;
}
}
/* Clear any GL errors */
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
;
data = ctx->glMapBufferRange (gl_target,
offset,
size,
gl_access);
if (_cogl_gl_util_catch_out_of_memory (ctx, error))
{
_cogl_buffer_gl_unbind (buffer);
return NULL;
}
_COGL_RETURN_VAL_IF_FAIL (data != NULL, NULL);
}
else
{
/* create an empty store if we don't have one yet. creating the store
* lazily allows the user of the CoglBuffer to set a hint before the
* store is created. */
if (!buffer->store_created ||
(hints & COGL_BUFFER_MAP_HINT_DISCARD))
{
if (!recreate_store (buffer, error))
{
_cogl_buffer_gl_unbind (buffer);
return NULL;
}
}
/* Clear any GL errors */
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
;
data = ctx->glMapBuffer (gl_target,
_cogl_buffer_access_to_gl_enum (access));
if (_cogl_gl_util_catch_out_of_memory (ctx, error))
{
_cogl_buffer_gl_unbind (buffer);
return NULL;
}
_COGL_RETURN_VAL_IF_FAIL (data != NULL, NULL);
data += offset;
}
if (data)
buffer->flags |= COGL_BUFFER_FLAG_MAPPED;
_cogl_buffer_gl_unbind (buffer);
return data;
}
static CoglBool
allocate_from_gl_foreign (CoglTextureRectangle *tex_rect,
CoglTextureLoader *loader,
CoglError **error)
{
CoglTexture *tex = COGL_TEXTURE (tex_rect);
CoglContext *ctx = tex->context;
CoglPixelFormat format = loader->src.gl_foreign.format;
GLenum gl_error = 0;
GLint gl_compressed = GL_FALSE;
GLenum gl_int_format = 0;
if (!ctx->texture_driver->allows_foreign_gl_target (ctx,
GL_TEXTURE_RECTANGLE_ARB))
{
_cogl_set_error (error,
COGL_SYSTEM_ERROR,
COGL_SYSTEM_ERROR_UNSUPPORTED,
"Foreign GL_TEXTURE_RECTANGLE textures are not "
"supported by your system");
return FALSE;
}
/* Make sure binding succeeds */
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
;
_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
loader->src.gl_foreign.gl_handle, TRUE);
if (ctx->glGetError () != GL_NO_ERROR)
{
_cogl_set_error (error,
COGL_SYSTEM_ERROR,
COGL_SYSTEM_ERROR_UNSUPPORTED,
"Failed to bind foreign GL_TEXTURE_RECTANGLE texture");
return FALSE;
}
/* Obtain texture parameters */
#ifdef HAVE_COGL_GL
if (_cogl_has_private_feature
(ctx, COGL_PRIVATE_FEATURE_QUERY_TEXTURE_PARAMETERS))
{
GLint val;
GE( ctx, glGetTexLevelParameteriv (GL_TEXTURE_RECTANGLE_ARB, 0,
GL_TEXTURE_COMPRESSED,
&gl_compressed) );
GE( ctx, 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 (!ctx->driver_vtable->pixel_format_from_gl_internal (ctx,
gl_int_format,
&format))
{
_cogl_set_error (error,
COGL_SYSTEM_ERROR,
COGL_SYSTEM_ERROR_UNSUPPORTED,
"Unsupported internal format for foreign texture");
return FALSE;
}
}
else
#endif
{
/* Otherwise we'll assume we can derive the GL format from the
passed in format */
ctx->driver_vtable->pixel_format_to_gl (ctx,
format,
&gl_int_format,
NULL,
NULL);
}
/* Compressed texture images not supported */
if (gl_compressed == GL_TRUE)
{
_cogl_set_error (error,
COGL_SYSTEM_ERROR,
COGL_SYSTEM_ERROR_UNSUPPORTED,
"Compressed foreign textures aren't currently supported");
return FALSE;
}
/* Setup bitmap info */
tex_rect->is_foreign = TRUE;
tex_rect->gl_texture = loader->src.gl_foreign.gl_handle;
tex_rect->gl_format = gl_int_format;
/* Unknown filter */
tex_rect->gl_legacy_texobj_min_filter = GL_FALSE;
tex_rect->gl_legacy_texobj_mag_filter = GL_FALSE;
tex_rect->internal_format = format;
_cogl_texture_set_allocated (COGL_TEXTURE (tex_rect),
format,
loader->src.gl_foreign.width,
loader->src.gl_foreign.height);
return TRUE;
}
static CoglBool
allocate_with_size (CoglTextureRectangle *tex_rect,
CoglTextureLoader *loader,
CoglError **error)
{
CoglTexture *tex = COGL_TEXTURE (tex_rect);
CoglContext *ctx = tex->context;
CoglPixelFormat internal_format;
int width = loader->src.sized.width;
int height = loader->src.sized.height;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
GLenum gl_error;
GLenum gl_texture;
internal_format =
_cogl_texture_determine_internal_format (tex, COGL_PIXEL_FORMAT_ANY);
if (!_cogl_texture_rectangle_can_create (ctx,
width,
height,
internal_format,
error))
return FALSE;
ctx->driver_vtable->pixel_format_to_gl (ctx,
internal_format,
&gl_intformat,
&gl_format,
&gl_type);
gl_texture =
ctx->texture_driver->gen (ctx,
GL_TEXTURE_RECTANGLE_ARB,
internal_format);
_cogl_bind_gl_texture_transient (GL_TEXTURE_RECTANGLE_ARB,
gl_texture,
tex_rect->is_foreign);
/* Clear any GL errors */
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
;
ctx->glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, gl_intformat,
width, height, 0, gl_format, gl_type, NULL);
if (_cogl_gl_util_catch_out_of_memory (ctx, error))
{
GE( ctx, glDeleteTextures (1, &gl_texture) );
return FALSE;
}
tex_rect->internal_format = internal_format;
tex_rect->gl_texture = gl_texture;
tex_rect->gl_format = gl_intformat;
_cogl_texture_set_allocated (COGL_TEXTURE (tex_rect),
internal_format, width, height);
return TRUE;
}