1000c80444
We had several different ways of exposing experimental API, in one case the symbols had no special suffix, in two other ways the symbols were given an _EXP suffix but in different ways. This makes all experimental API have an _EXP suffix which is handled using #defines in the header so the prototypes in the .c and .h files don't have the suffix. The documented reason for the suffix is so that anyone watching Cogl for ABI changes who sees symbols disappear will hopefully understand what's going on.
269 lines
6.4 KiB
C
269 lines
6.4 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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*/
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/* For an overview of the functionality implemented here, please see
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* cogl-buffer.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-handle.h"
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#include "cogl-pixel-buffer-private.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_ARRAY_BUFFER
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#define GL_ARRAY_BUFFER GL_ARRAY_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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gboolean
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cogl_is_buffer (const void *object)
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{
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CoglObject *obj = (CoglObject *)object;
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if (obj == NULL)
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return FALSE;
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return obj->klass->type == _cogl_handle_pixel_buffer_get_type ();
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}
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void
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_cogl_buffer_initialize (CoglBuffer *buffer,
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unsigned int size,
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CoglBufferUsageHint usage_hint,
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CoglBufferUpdateHint update_hint)
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{
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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buffer->flags = COGL_BUFFER_FLAG_NONE;
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buffer->size = size;
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buffer->usage_hint = usage_hint;
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buffer->update_hint = update_hint;
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buffer->data = NULL;
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}
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void
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_cogl_buffer_fini (CoglBuffer *buffer)
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{
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if (COGL_BUFFER_FLAG_IS_SET (buffer, MAPPED))
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cogl_buffer_unmap (buffer);
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}
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/* OpenGL ES 1.1 and 2 have a GL_OES_mapbuffer extension that is able to map
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* VBOs for write only, we don't support that in CoglBuffer */
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#if defined (COGL_HAS_GLES)
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GLenum
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_cogl_buffer_access_to_gl_enum (CoglBufferAccess access)
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{
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return 0;
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}
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#else
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GLenum
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_cogl_buffer_access_to_gl_enum (CoglBufferAccess access)
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{
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if ((access & COGL_BUFFER_ACCESS_READ_WRITE) == COGL_BUFFER_ACCESS_READ_WRITE)
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return GL_READ_WRITE;
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else if (access & COGL_BUFFER_ACCESS_WRITE)
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return GL_WRITE_ONLY;
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else
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return GL_READ_ONLY;
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}
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#endif
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/* OpenGL ES 1.1 and 2 only know about STATIC_DRAW and DYNAMIC_DRAW */
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#if defined (COGL_HAS_GLES)
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GLenum
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_cogl_buffer_hints_to_gl_enum (CoglBufferUsageHint usage_hint,
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CoglBufferUpdateHint update_hint)
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{
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/* usage hint is always TEXTURE for now */
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if (update_hint == COGL_BUFFER_UPDATE_HINT_STATIC)
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return GL_STATIC_DRAW;
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return GL_DYNAMIC_DRAW;
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}
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#else
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GLenum
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_cogl_buffer_hints_to_gl_enum (CoglBufferUsageHint usage_hint,
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CoglBufferUpdateHint update_hint)
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{
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/* usage hint is always TEXTURE for now */
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if (update_hint == COGL_BUFFER_UPDATE_HINT_STATIC)
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return GL_STATIC_DRAW;
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if (update_hint == COGL_BUFFER_UPDATE_HINT_DYNAMIC)
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return GL_DYNAMIC_DRAW;
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if (update_hint == COGL_BUFFER_UPDATE_HINT_STREAM)
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return GL_STREAM_DRAW;
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return GL_STATIC_DRAW;
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}
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#endif
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void
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_cogl_buffer_bind (CoglBuffer *buffer,
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GLenum target)
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{
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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/* Don't bind again an already bound pbo */
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if (ctx->current_pbo == buffer)
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return;
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if (buffer && COGL_BUFFER_FLAG_IS_SET (buffer, BUFFER_OBJECT))
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{
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GE( glBindBuffer (target, buffer->gl_handle) );
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}
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else if (buffer == NULL &&
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ctx->current_pbo &&
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COGL_BUFFER_FLAG_IS_SET (ctx->current_pbo, BUFFER_OBJECT))
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{
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GE( glBindBuffer (target, 0) );
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}
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ctx->current_pbo = buffer;
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}
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unsigned int
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cogl_buffer_get_size (CoglBuffer *buffer)
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{
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if (!cogl_is_buffer (buffer))
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return 0;
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return COGL_BUFFER (buffer)->size;
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}
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void
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cogl_buffer_set_usage_hint (CoglBuffer *buffer,
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CoglBufferUsageHint hint)
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{
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if (!cogl_is_buffer (buffer))
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return;
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if (G_UNLIKELY (hint > COGL_BUFFER_USAGE_HINT_TEXTURE))
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hint = COGL_BUFFER_USAGE_HINT_TEXTURE;
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buffer->usage_hint = hint;
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}
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CoglBufferUsageHint
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cogl_buffer_get_usage_hint (CoglBuffer *buffer)
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{
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if (!cogl_is_buffer (buffer))
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return FALSE;
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return buffer->usage_hint;
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}
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void
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cogl_buffer_set_update_hint (CoglBuffer *buffer,
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CoglBufferUpdateHint hint)
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{
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if (!cogl_is_buffer (buffer))
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return;
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if (G_UNLIKELY (hint > COGL_BUFFER_UPDATE_HINT_STREAM))
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hint = COGL_BUFFER_UPDATE_HINT_STATIC;
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buffer->update_hint = hint;
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}
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CoglBufferUpdateHint
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cogl_buffer_get_update_hint (CoglBuffer *buffer)
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{
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if (!cogl_is_buffer (buffer))
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return FALSE;
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return buffer->update_hint;
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}
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guint8 *
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cogl_buffer_map (CoglBuffer *buffer,
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CoglBufferAccess access)
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{
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if (!cogl_is_buffer (buffer))
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return NULL;
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if (COGL_BUFFER_FLAG_IS_SET (buffer, MAPPED))
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return buffer->data;
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buffer->data = buffer->vtable->map (buffer, access);
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return buffer->data;
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}
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void
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cogl_buffer_unmap (CoglBuffer *buffer)
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{
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if (!cogl_is_buffer (buffer))
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return;
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if (!COGL_BUFFER_FLAG_IS_SET (buffer, MAPPED))
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return;
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buffer->vtable->unmap (buffer);
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}
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gboolean
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cogl_buffer_set_data (CoglBuffer *buffer,
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gsize offset,
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const guint8 *data,
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gsize size)
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{
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if (!cogl_is_buffer (buffer))
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return FALSE;
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if (G_UNLIKELY((offset + size) > buffer->size))
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return FALSE;
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return buffer->vtable->set_data (buffer, offset, data, size);
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}
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