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4eca571a32
This function creates a CoglBitmap which internally references a CoglBuffer. The map and unmap functions will divert to mapping the buffer. There are also now bind and unbind functions which should be used instead of map and unmap whenever the data doesn't need to be read from the CPU but will instead be passed to GL for packing or unpacking. For bitmaps created from buffers this just binds the bitmap. cogl_texture_new_from_buffer now just uses this function to wrap the buffer in a bitmap rather than trying to bind the buffer immediately. This means that the buffer will be bound only at the point right before the texture data is uploaded. This approach means that using a pixel array will take the fastest upload route if possible, but can still fallback to copying the data by mapping the buffer if some conversion is needed. Previously it would just crash in this case because the texture functions were all passed a NULL pointer. http://bugzilla.clutter-project.org/show_bug.cgi?id=2112
202 lines
6.3 KiB
C
202 lines
6.3 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-handle.h"
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#include "cogl-buffer.h"
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/*
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* CoglBitmapDestroyNotify:
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* @data: The image data
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* @destroy_data: The callback closure data that was given to
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* _cogl_bitmap_new_from_data().
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*
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* Function prototype that is used to destroy the bitmap data when
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* _cogl_bitmap_new_from_data() is called.
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*/
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typedef void (* CoglBitmapDestroyNotify) (guint8 *data, void *destroy_data);
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/*
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* _cogl_bitmap_new_from_data:
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* @data: A pointer to the data. The bitmap will take ownership of this data.
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* @format: The format of the pixel data.
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* @width: The width of the bitmap.
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* @height: The height of the bitmap.
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* @rowstride: The rowstride of the bitmap (the number of bytes from
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* the start of one row of the bitmap to the next).
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* @destroy_fn: A function to be called when the bitmap is
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* destroyed. This should free @data. %NULL can be used instead if
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* no free is needed.
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* @destroy_fn_data: This pointer will get passed to @destroy_fn.
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*
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* Creates a bitmap using some existing data. The data is not copied
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* so the bitmap will take ownership of the data pointer. When the
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* bitmap is freed @destroy_fn will be called to free the data.
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*
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* Return value: A new %CoglBitmap.
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*/
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CoglBitmap *
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_cogl_bitmap_new_from_data (guint8 *data,
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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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CoglBitmapDestroyNotify destroy_fn,
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gpointer destroy_fn_data);
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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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/* This creates a cogl bitmap that internally references a pixel
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array. The data is not copied. _cogl_bitmap_map will divert to
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mapping the pixel array */
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CoglBitmap *
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_cogl_bitmap_new_from_buffer (CoglBuffer *buffer,
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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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int offset);
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gboolean
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_cogl_bitmap_can_convert (CoglPixelFormat src, CoglPixelFormat dst);
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gboolean
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_cogl_bitmap_fallback_can_convert (CoglPixelFormat src, CoglPixelFormat dst);
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gboolean
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_cogl_bitmap_can_unpremult (CoglPixelFormat format);
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gboolean
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_cogl_bitmap_fallback_can_unpremult (CoglPixelFormat format);
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gboolean
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_cogl_bitmap_can_premult (CoglPixelFormat format);
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gboolean
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_cogl_bitmap_fallback_can_premult (CoglPixelFormat format);
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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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CoglBitmap *
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_cogl_bitmap_fallback_convert (CoglBitmap *bmp,
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CoglPixelFormat dst_format);
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gboolean
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_cogl_bitmap_unpremult (CoglBitmap *dst_bmp);
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gboolean
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_cogl_bitmap_fallback_unpremult (CoglBitmap *dst_bmp);
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gboolean
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_cogl_bitmap_premult (CoglBitmap *dst_bmp);
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gboolean
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_cogl_bitmap_fallback_premult (CoglBitmap *dst_bmp);
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CoglBitmap *
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_cogl_bitmap_from_file (const char *filename,
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GError **error);
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CoglBitmap *
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_cogl_bitmap_fallback_from_file (const char *filename);
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gboolean
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_cogl_bitmap_convert_premult_status (CoglBitmap *bmp,
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CoglPixelFormat dst_format);
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CoglBitmap *
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_cogl_bitmap_convert_format_and_premult (CoglBitmap *bmp,
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CoglPixelFormat dst_format);
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void
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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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gboolean
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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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CoglPixelFormat
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_cogl_bitmap_get_format (CoglBitmap *bitmap);
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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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int
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_cogl_bitmap_get_width (CoglBitmap *bitmap);
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int
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_cogl_bitmap_get_height (CoglBitmap *bitmap);
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int
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_cogl_bitmap_get_rowstride (CoglBitmap *bitmap);
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guint8 *
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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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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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guint8 *
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_cogl_bitmap_bind (CoglBitmap *bitmap,
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CoglBufferAccess access,
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CoglBufferMapHint hints);
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void
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_cogl_bitmap_unbind (CoglBitmap *bitmap);
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#endif /* __COGL_BITMAP_H */
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