049e7882b7
These are the only pieces of the cogl bitmap support that need GL driver knowledge, so move them there like the TODO suggests. https://gitlab.gnome.org/GNOME/mutter/merge_requests/874
123 lines
3.7 KiB
C
123 lines
3.7 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2007,2008,2009 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*
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*/
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#include "cogl-config.h"
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#include "cogl-util.h"
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#include "cogl-debug.h"
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#include "cogl-private.h"
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#include "cogl-bitmap-private.h"
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#include "cogl-buffer-private.h"
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#include "cogl-pixel-buffer.h"
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#include "cogl-context-private.h"
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#include "cogl-gtype-private.h"
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#include "cogl-buffer-gl-private.h"
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#include "cogl-bitmap-gl-private.h"
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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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GError **error)
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{
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uint8_t *ptr;
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GError *internal_error = NULL;
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g_return_val_if_fail (access & (COGL_BUFFER_ACCESS_READ |
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COGL_BUFFER_ACCESS_WRITE),
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NULL);
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/* Divert to another bitmap if this data is shared */
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if (bitmap->shared_bmp)
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return _cogl_bitmap_gl_bind (bitmap->shared_bmp, access, hints, error);
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g_return_val_if_fail (!bitmap->bound, NULL);
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/* If the bitmap wasn't created from a buffer then the
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implementation of bind is the same as map */
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if (bitmap->buffer == NULL)
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{
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uint8_t *data = _cogl_bitmap_map (bitmap, access, hints, error);
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if (data)
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bitmap->bound = TRUE;
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return data;
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}
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if (access == COGL_BUFFER_ACCESS_READ)
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ptr = _cogl_buffer_gl_bind (bitmap->buffer,
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COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK,
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&internal_error);
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else if (access == COGL_BUFFER_ACCESS_WRITE)
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ptr = _cogl_buffer_gl_bind (bitmap->buffer,
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COGL_BUFFER_BIND_TARGET_PIXEL_PACK,
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&internal_error);
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else
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{
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ptr = NULL;
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g_assert_not_reached ();
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return NULL;
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}
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/* NB: _cogl_buffer_gl_bind() may return NULL in non-error
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* conditions so we have to explicitly check internal_error to see
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* if an exception was thrown */
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if (internal_error)
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{
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g_propagate_error (error, internal_error);
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return NULL;
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}
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bitmap->bound = TRUE;
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/* The data pointer actually stores the offset */
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return ptr + GPOINTER_TO_INT (bitmap->data);
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}
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void
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_cogl_bitmap_gl_unbind (CoglBitmap *bitmap)
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{
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/* Divert to another bitmap if this data is shared */
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if (bitmap->shared_bmp)
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{
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_cogl_bitmap_gl_unbind (bitmap->shared_bmp);
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return;
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}
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g_assert (bitmap->bound);
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bitmap->bound = FALSE;
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/* If the bitmap wasn't created from a pixel array then the
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implementation of unbind is the same as unmap */
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if (bitmap->buffer)
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_cogl_buffer_gl_unbind (bitmap->buffer);
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else
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_cogl_bitmap_unmap (bitmap);
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}
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