f53fb5e2e0
This allows apps to catch out-of-memory errors when allocating textures. Textures can be pretty huge at times and so it's quite possible for an application to try and allocate more memory than is available. It's also very possible that the application can take some action in response to reduce memory pressure (such as freeing up texture caches perhaps) so we shouldn't just automatically abort like we do for trivial heap allocations. These public functions now take a CoglError argument so applications can catch out of memory errors: cogl_buffer_map cogl_buffer_map_range cogl_buffer_set_data cogl_framebuffer_read_pixels_into_bitmap cogl_pixel_buffer_new cogl_texture_new_from_data cogl_texture_new_from_bitmap Note: we've been quite conservative with how many apis we let throw OOM CoglErrors since we don't really want to put a burdon on developers to be checking for errors with every cogl api call. So long as there is some lower level api for apps to use that let them catch OOM errors for everything necessary that's enough and we don't have to make more convenient apis more awkward to use. The main focus is on bitmaps and texture allocations since they can be particularly large and prone to failing. A new cogl_attribute_buffer_new_with_size() function has been added in case developers need to catch OOM errors when allocating attribute buffers whereby they can first use _buffer_new_with_size() (which doesn't take a CoglError) followed by cogl_buffer_set_data() which will lazily allocate the buffer storage and report OOM errors. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit f7735e141ad537a253b02afa2a8238f96340b978) Note: since we can't break the API for Cogl 1.x then actually the main purpose of cherry picking this patch is to keep in-line with changes on the master branch so that we can easily cherry-pick patches. All the api changes relating stable apis released on the 1.12 branch have been reverted as part of cherry-picking this patch so this most just applies all the internal plumbing changes that enable us to correctly propagate OOM errors.
201 lines
6.1 KiB
C
201 lines
6.1 KiB
C
/*
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* Clutter COGL
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*
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* A basic GL/GLES Abstraction/Utility Layer
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2007 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifndef __COGL_BITMAP_H
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#define __COGL_BITMAP_H
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#include <glib.h>
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#include "cogl-object-private.h"
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#include "cogl-buffer.h"
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#include "cogl-bitmap.h"
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#ifdef COGL_HAS_ANDROID_SUPPORT
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#include <android/asset_manager.h>
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#endif
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struct _CoglBitmap
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{
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CoglObject _parent;
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/* Pointer back to the context that this bitmap was created with */
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CoglContext *context;
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CoglPixelFormat format;
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int width;
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int height;
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int rowstride;
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uint8_t *data;
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CoglBool mapped;
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CoglBool bound;
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/* If this is non-null then 'data' is ignored and instead it is
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fetched from this shared bitmap. */
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CoglBitmap *shared_bmp;
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/* If this is non-null then 'data' is treated as an offset into the
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buffer and map will divert to mapping the buffer */
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CoglBuffer *buffer;
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};
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/*
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* _cogl_bitmap_new_with_malloc_buffer:
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* @context: A #CoglContext
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* @width: width of the bitmap in pixels
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* @height: height of the bitmap in pixels
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* @format: the format of the pixels the array will store
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*
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* This is equivalent to cogl_bitmap_new_with_size() except that it
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* allocated the buffer using g_malloc() instead of creating a
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* #CoglPixelBuffer. The buffer will be automatically destroyed when
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* the bitmap is freed.
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*
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* Return value: a #CoglPixelBuffer representing the newly created array
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*
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* Since: 1.10
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* Stability: Unstable
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*/
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CoglBitmap *
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_cogl_bitmap_new_with_malloc_buffer (CoglContext *context,
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unsigned int width,
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unsigned int height,
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CoglPixelFormat format);
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/* The idea of this function is that it will create a bitmap that
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shares the actual data with another bitmap. This is needed for the
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atlas texture backend because it needs upload a bitmap to a sub
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texture but override the format so that it ignores the premult
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flag. */
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CoglBitmap *
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_cogl_bitmap_new_shared (CoglBitmap *shared_bmp,
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CoglPixelFormat format,
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int width,
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int height,
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int rowstride);
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CoglBitmap *
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_cogl_bitmap_convert (CoglBitmap *bmp,
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CoglPixelFormat dst_format,
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CoglError **error);
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CoglBool
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_cogl_bitmap_convert_into_bitmap (CoglBitmap *src_bmp,
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CoglBitmap *dst_bmp,
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CoglError **error);
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CoglBitmap *
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_cogl_bitmap_from_file (CoglContext *ctx,
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const char *filename,
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CoglError **error);
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#ifdef COGL_HAS_ANDROID_SUPPORT
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CoglBitmap *
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_cogl_android_bitmap_new_from_asset (CoglContext *ctx,
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AAssetManager *manager,
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const char *filename,
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CoglError **error);
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#endif
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CoglBool
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_cogl_bitmap_unpremult (CoglBitmap *dst_bmp,
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CoglError **error);
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CoglBool
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_cogl_bitmap_premult (CoglBitmap *dst_bmp,
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CoglError **error);
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CoglBool
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_cogl_bitmap_convert_premult_status (CoglBitmap *bmp,
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CoglPixelFormat dst_format,
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CoglError **error);
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CoglBool
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_cogl_bitmap_copy_subregion (CoglBitmap *src,
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CoglBitmap *dst,
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int src_x,
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int src_y,
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int dst_x,
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int dst_y,
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int width,
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int height,
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CoglError **error);
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/* Creates a deep copy of the source bitmap */
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CoglBitmap *
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_cogl_bitmap_copy (CoglBitmap *src_bmp,
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CoglError **error);
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CoglBool
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_cogl_bitmap_get_size_from_file (const char *filename,
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int *width,
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int *height);
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void
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_cogl_bitmap_set_format (CoglBitmap *bitmap,
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CoglPixelFormat format);
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/* Maps the bitmap so that the pixels can be accessed directly or if
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the bitmap is just a memory bitmap then it just returns the pointer
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to memory. Note that the bitmap isn't guaranteed to allocated to
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the full size of rowstride*height so it is not safe to read up to
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the rowstride of the last row. This will be the case if the user
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uploads data using gdk_pixbuf_new_subpixbuf with a sub region
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containing the last row of the pixbuf because in that case the
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rowstride can be much larger than the width of the image */
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uint8_t *
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_cogl_bitmap_map (CoglBitmap *bitmap,
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CoglBufferAccess access,
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CoglBufferMapHint hints,
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CoglError **error);
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void
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_cogl_bitmap_unmap (CoglBitmap *bitmap);
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/* These two are replacements for map and unmap that should used when
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* the pointer is going to be passed to GL for pixel packing or
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* unpacking. The address might not be valid for reading if the bitmap
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* was created with new_from_buffer but it will however be good to
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* pass to glTexImage2D for example. The access should be READ for
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* unpacking and WRITE for packing. It can not be both
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*
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* TODO: split this bind/unbind functions out into a GL specific file
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*/
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uint8_t *
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_cogl_bitmap_gl_bind (CoglBitmap *bitmap,
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CoglBufferAccess access,
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CoglBufferMapHint hints,
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CoglError **error);
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void
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_cogl_bitmap_gl_unbind (CoglBitmap *bitmap);
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CoglContext *
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_cogl_bitmap_get_context (CoglBitmap *bitmap);
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#endif /* __COGL_BITMAP_H */
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