a17dfcf1c2
Since we'll want to share the fallback logic with CoglVertexArray this moves the malloc based fallback (for when OpenGL doesn't support vertex or pixel buffer objects) into cogl-buffer.c.
163 lines
4.4 KiB
C
163 lines
4.4 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2010 Intel Corporation.
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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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* Authors:
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* Damien Lespiau <damien.lespiau@intel.com>
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* Robert Bragg <robert@linux.intel.com>
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*/
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/* For an overview of the functionality implemented here, please see
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* cogl-pixel-array.h, which contains the gtk-doc section overview for the
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* Pixel Buffers API.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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#include "cogl.h"
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#include "cogl-internal.h"
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#include "cogl-util.h"
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#include "cogl-context.h"
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#include "cogl-object.h"
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#include "cogl-pixel-array-private.h"
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#include "cogl-pixel-array.h"
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/*
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* GL/GLES compatibility defines for the buffer API:
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*/
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#if defined (HAVE_COGL_GL)
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#define glGenBuffers ctx->drv.pf_glGenBuffers
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#define glBindBuffer ctx->drv.pf_glBindBuffer
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#define glBufferData ctx->drv.pf_glBufferData
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#define glBufferSubData ctx->drv.pf_glBufferSubData
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#define glGetBufferSubData ctx->drv.pf_glGetBufferSubData
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#define glDeleteBuffers ctx->drv.pf_glDeleteBuffers
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#define glMapBuffer ctx->drv.pf_glMapBuffer
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#define glUnmapBuffer ctx->drv.pf_glUnmapBuffer
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#ifndef GL_PIXEL_UNPACK_BUFFER
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#define GL_PIXEL_UNPACK_BUFFER GL_PIXEL_UNPACK_BUFFER_ARB
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#endif
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#ifndef GL_PIXEL_PACK_BUFFER
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#define GL_PIXEL_PACK_BUFFER GL_PIXEL_PACK_BUFFER_ARB
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#endif
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#elif defined (HAVE_COGL_GLES2)
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#include "../gles/cogl-gles2-wrapper.h"
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#endif
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static void
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_cogl_pixel_array_free (CoglPixelArray *buffer);
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#if !defined (COGL_HAS_GLES)
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static const CoglBufferVtable
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cogl_pixel_array_vtable;
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#endif
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static const CoglBufferVtable
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cogl_malloc_pixel_array_vtable;
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COGL_BUFFER_DEFINE (PixelArray, pixel_array)
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static CoglPixelArray *
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_cogl_pixel_array_new (unsigned int size)
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{
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CoglPixelArray *pixel_array = g_slice_new0 (CoglPixelArray);
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CoglBuffer *buffer = COGL_BUFFER (pixel_array);
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gboolean use_malloc;
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_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
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if (!cogl_features_available (COGL_FEATURE_PBOS))
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use_malloc = TRUE;
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else
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use_malloc = FALSE;
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/* parent's constructor */
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_cogl_buffer_initialize (buffer,
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size,
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use_malloc,
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COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK,
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COGL_BUFFER_USAGE_HINT_TEXTURE,
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COGL_BUFFER_UPDATE_HINT_STATIC);
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pixel_array->flags = COGL_PIXEL_ARRAY_FLAG_NONE;
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/* return COGL_INVALID_HANDLE; */
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return _cogl_pixel_array_object_new (pixel_array);
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}
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CoglPixelArray *
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cogl_pixel_array_new_with_size (unsigned int width,
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unsigned int height,
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CoglPixelFormat format,
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unsigned int *rowstride)
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{
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CoglPixelArray *buffer;
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CoglPixelArray *pixel_array;
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unsigned int stride;
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/* creating a buffer to store "any" format does not make sense */
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if (G_UNLIKELY (format == COGL_PIXEL_FORMAT_ANY))
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return COGL_INVALID_HANDLE;
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/* for now we fallback to cogl_pixel_array_new, later, we could ask
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* libdrm a tiled buffer for instance */
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stride = width * _cogl_get_format_bpp (format);
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if (rowstride)
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*rowstride = stride;
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buffer = _cogl_pixel_array_new (height * stride);
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if (G_UNLIKELY (buffer == COGL_INVALID_HANDLE))
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return COGL_INVALID_HANDLE;
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pixel_array = COGL_PIXEL_ARRAY (buffer);
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pixel_array->width = width;
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pixel_array->height = height;
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pixel_array->format = format;
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pixel_array->stride = stride;
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return buffer;
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}
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static void
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_cogl_pixel_array_free (CoglPixelArray *buffer)
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{
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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/* parent's destructor */
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_cogl_buffer_fini (COGL_BUFFER (buffer));
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GE( glDeleteBuffers (1, &(COGL_BUFFER (buffer)->gl_handle)) );
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g_slice_free (CoglPixelArray, buffer);
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}
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