324 lines
8.9 KiB
C
324 lines
8.9 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-pixel-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-object.h"
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#include "cogl-pixel-buffer-private.h"
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#include "cogl-pixel-buffer.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_buffer_free (CoglPixelBuffer *buffer);
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#if !defined (COGL_HAS_GLES)
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static const CoglBufferVtable
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cogl_pixel_buffer_vtable;
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#endif
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static const CoglBufferVtable
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cogl_malloc_pixel_buffer_vtable;
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COGL_OBJECT_DEFINE (PixelBuffer, pixel_buffer)
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CoglPixelBuffer *
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cogl_pixel_buffer_new (unsigned int size)
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{
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CoglPixelBuffer *pixel_buffer = g_slice_new0 (CoglPixelBuffer);
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CoglBuffer *buffer = COGL_BUFFER (pixel_buffer);
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_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
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/* parent's constructor */
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_cogl_buffer_initialize (buffer,
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size,
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COGL_BUFFER_USAGE_HINT_TEXTURE,
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COGL_BUFFER_UPDATE_HINT_STATIC);
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/* malloc version only for GLES */
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#if !defined (COGL_HAS_GLES)
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if (cogl_features_available (COGL_FEATURE_PBOS))
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{
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/* PBOS */
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buffer->vtable = &cogl_pixel_buffer_vtable;
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GE( glGenBuffers (1, &buffer->gl_handle) );
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COGL_BUFFER_SET_FLAG (buffer, BUFFER_OBJECT);
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}
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else
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#endif
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{
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/* malloc fallback subclass */
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buffer->vtable = &cogl_malloc_pixel_buffer_vtable;
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/* create the buffer here as there's no point for a lazy allocation in
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* the malloc case */
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buffer->data = g_malloc (size);
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}
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pixel_buffer->flags = COGL_PIXEL_BUFFER_FLAG_NONE;
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/* return COGL_INVALID_HANDLE; */
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return _cogl_pixel_buffer_object_new (pixel_buffer);
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}
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CoglPixelBuffer *
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cogl_pixel_buffer_new_for_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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CoglPixelBuffer *buffer;
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CoglPixelBuffer *pixel_buffer;
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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_buffer_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_buffer_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_buffer = COGL_PIXEL_BUFFER (buffer);
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pixel_buffer->width = width;
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pixel_buffer->height = height;
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pixel_buffer->format = format;
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pixel_buffer->stride = stride;
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return buffer;
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}
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static void
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_cogl_pixel_buffer_free (CoglPixelBuffer *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 (CoglPixelBuffer, buffer);
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}
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#if !defined (COGL_HAS_GLES)
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static guint8 *
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_cogl_pixel_buffer_map (CoglBuffer *buffer,
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CoglBufferAccess access)
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{
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CoglPixelBuffer *pixel_buffer = COGL_PIXEL_BUFFER (buffer);
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GLenum gl_target;
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guint8 *data;
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_COGL_GET_CONTEXT (ctx, NULL);
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/* we determine the target lazily, on the first map */
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gl_target = GL_PIXEL_UNPACK_BUFFER;
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pixel_buffer->gl_target = gl_target;
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_cogl_buffer_bind (buffer, gl_target);
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/* create an empty store if we don't have one yet. creating the store
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* lazily allows the user of the CoglBuffer to set a hint before the
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* store is created. */
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if (!COGL_PIXEL_BUFFER_FLAG_IS_SET (pixel_buffer, STORE_CREATED))
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{
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GE( glBufferData (gl_target,
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buffer->size,
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NULL,
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_cogl_buffer_hints_to_gl_enum (buffer->usage_hint,
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buffer->update_hint)) );
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COGL_PIXEL_BUFFER_SET_FLAG (pixel_buffer, STORE_CREATED);
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}
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GE_RET( data, glMapBuffer (gl_target,
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_cogl_buffer_access_to_gl_enum (access)) );
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if (data)
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COGL_BUFFER_SET_FLAG (buffer, MAPPED);
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_cogl_buffer_bind (NULL, gl_target);
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return data;
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}
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static void
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_cogl_pixel_buffer_unmap (CoglBuffer *buffer)
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{
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CoglPixelBuffer *pixel_buffer = COGL_PIXEL_BUFFER (buffer);
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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_cogl_buffer_bind (buffer, pixel_buffer->gl_target);
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GE( glUnmapBuffer (pixel_buffer->gl_target) );
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COGL_BUFFER_CLEAR_FLAG (buffer, MAPPED);
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_cogl_buffer_bind (NULL, pixel_buffer->gl_target);
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}
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static gboolean
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_cogl_pixel_buffer_set_data (CoglBuffer *buffer,
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unsigned int offset,
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const guint8 *data,
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unsigned int size)
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{
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CoglPixelBuffer *pixel_buffer = COGL_PIXEL_BUFFER (buffer);
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_COGL_GET_CONTEXT (ctx, FALSE);
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pixel_buffer->gl_target = GL_PIXEL_UNPACK_BUFFER;
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_cogl_buffer_bind (buffer, pixel_buffer->gl_target);
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/* create an empty store if we don't have one yet. creating the store
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* lazily allows the user of the CoglBuffer to set a hint before the
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* store is created. */
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if (!COGL_PIXEL_BUFFER_FLAG_IS_SET (pixel_buffer, STORE_CREATED))
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{
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GE( glBufferData (pixel_buffer->gl_target,
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buffer->size,
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NULL,
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_cogl_buffer_hints_to_gl_enum (buffer->usage_hint,
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buffer->update_hint)) );
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COGL_PIXEL_BUFFER_SET_FLAG (pixel_buffer, STORE_CREATED);
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}
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GE( glBufferSubData (pixel_buffer->gl_target, offset, size, data) );
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_cogl_buffer_bind (NULL, pixel_buffer->gl_target);
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return TRUE;
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}
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#if 0
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gboolean
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cogl_pixel_buffer_set_region (CoglPixelBuffer *buffer,
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guint8 *data,
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unsigned int src_width,
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unsigned int src_height,
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unsigned int src_rowstride,
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unsigned int dst_x,
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unsigned int dst_y)
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{
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if (!cogl_is_pixel_buffer (buffer))
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return FALSE;
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return TRUE;
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}
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#endif
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static const CoglBufferVtable cogl_pixel_buffer_vtable =
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{
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_cogl_pixel_buffer_map,
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_cogl_pixel_buffer_unmap,
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_cogl_pixel_buffer_set_data,
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};
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#endif
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/*
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* Fallback path, buffer->data points to a malloc'ed buffer.
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*/
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static guint8 *
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_cogl_malloc_pixel_buffer_map (CoglBuffer *buffer,
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CoglBufferAccess access)
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{
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COGL_BUFFER_SET_FLAG (buffer, MAPPED);
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return buffer->data;
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}
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static void
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_cogl_malloc_pixel_buffer_unmap (CoglBuffer *buffer)
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{
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COGL_BUFFER_CLEAR_FLAG (buffer, MAPPED);
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}
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static gboolean
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_cogl_malloc_pixel_buffer_set_data (CoglBuffer *buffer,
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unsigned int offset,
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const guint8 *data,
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unsigned int size)
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{
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memcpy (buffer->data + offset, data, size);
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return TRUE;
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}
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static const CoglBufferVtable cogl_malloc_pixel_buffer_vtable =
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{
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_cogl_malloc_pixel_buffer_map,
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_cogl_malloc_pixel_buffer_unmap,
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_cogl_malloc_pixel_buffer_set_data,
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};
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