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af0dc3431d
‘Propagate’ was misspelled as ‘propogate’. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 5fb4a6178c3e64371c01510690d9de1e8a740bde)
419 lines
11 KiB
C
419 lines
11 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) 2010,2011,2012 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-context-private.h"
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#include "cogl-buffer-gl-private.h"
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#include "cogl-error-private.h"
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#include "cogl-util-gl-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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#ifndef GL_PIXEL_PACK_BUFFER
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#define GL_PIXEL_PACK_BUFFER 0x88EB
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#endif
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#ifndef GL_PIXEL_UNPACK_BUFFER
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#define GL_PIXEL_UNPACK_BUFFER 0x88EC
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#endif
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#ifndef GL_ARRAY_BUFFER
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#define GL_ARRAY_BUFFER 0x8892
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#endif
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#ifndef GL_ELEMENT_ARRAY_BUFFER
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#define GL_ARRAY_BUFFER 0x8893
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#endif
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#ifndef GL_READ_ONLY
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#define GL_READ_ONLY 0x88B8
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#endif
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#ifndef GL_WRITE_ONLY
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#define GL_WRITE_ONLY 0x88B9
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#endif
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#ifndef GL_READ_WRITE
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#define GL_READ_WRITE 0x88BA
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#endif
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#ifndef GL_MAP_READ_BIT
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#define GL_MAP_READ_BIT 0x0001
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#endif
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#ifndef GL_MAP_WRITE_BIT
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#define GL_MAP_WRITE_BIT 0x0002
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#endif
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#ifndef GL_MAP_INVALIDATE_RANGE_BIT
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#define GL_MAP_INVALIDATE_RANGE_BIT 0x0004
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#endif
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#ifndef GL_MAP_INVALIDATE_BUFFER_BIT
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#define GL_MAP_INVALIDATE_BUFFER_BIT 0x0008
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#endif
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void
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_cogl_buffer_gl_create (CoglBuffer *buffer)
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{
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CoglContext *ctx = buffer->context;
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GE (ctx, glGenBuffers (1, &buffer->gl_handle));
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}
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void
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_cogl_buffer_gl_destroy (CoglBuffer *buffer)
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{
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GE( buffer->context, glDeleteBuffers (1, &buffer->gl_handle) );
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}
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static GLenum
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update_hints_to_gl_enum (CoglBuffer *buffer)
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{
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/* usage hint is always DRAW for now */
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switch (buffer->update_hint)
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{
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case COGL_BUFFER_UPDATE_HINT_STATIC:
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return GL_STATIC_DRAW;
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case COGL_BUFFER_UPDATE_HINT_DYNAMIC:
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return GL_DYNAMIC_DRAW;
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case COGL_BUFFER_UPDATE_HINT_STREAM:
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/* OpenGL ES 1.1 only knows about STATIC_DRAW and DYNAMIC_DRAW */
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#if defined(HAVE_COGL_GL) || defined(HAVE_COGL_GLES2)
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if (buffer->context->driver != COGL_DRIVER_GLES1)
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return GL_STREAM_DRAW;
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#else
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return GL_DYNAMIC_DRAW;
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#endif
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}
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g_assert_not_reached ();
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}
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static GLenum
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convert_bind_target_to_gl_target (CoglBufferBindTarget target)
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{
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switch (target)
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{
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case COGL_BUFFER_BIND_TARGET_PIXEL_PACK:
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return GL_PIXEL_PACK_BUFFER;
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case COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK:
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return GL_PIXEL_UNPACK_BUFFER;
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case COGL_BUFFER_BIND_TARGET_ATTRIBUTE_BUFFER:
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return GL_ARRAY_BUFFER;
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case COGL_BUFFER_BIND_TARGET_INDEX_BUFFER:
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return GL_ELEMENT_ARRAY_BUFFER;
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default:
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g_return_val_if_reached (COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK);
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}
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}
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static CoglBool
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recreate_store (CoglBuffer *buffer,
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CoglError **error)
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{
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CoglContext *ctx = buffer->context;
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GLenum gl_target;
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GLenum gl_enum;
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GLenum gl_error;
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/* This assumes the buffer is already bound */
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gl_target = convert_bind_target_to_gl_target (buffer->last_target);
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gl_enum = update_hints_to_gl_enum (buffer);
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/* Clear any GL errors */
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while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
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;
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ctx->glBufferData (gl_target,
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buffer->size,
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NULL,
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gl_enum);
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if (_cogl_gl_util_catch_out_of_memory (ctx, error))
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return FALSE;
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buffer->store_created = TRUE;
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return TRUE;
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}
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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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static void *
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_cogl_buffer_bind_no_create (CoglBuffer *buffer,
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CoglBufferBindTarget target)
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{
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CoglContext *ctx = buffer->context;
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_COGL_RETURN_VAL_IF_FAIL (buffer != NULL, NULL);
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/* Don't allow binding the buffer to multiple targets at the same time */
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_COGL_RETURN_VAL_IF_FAIL (ctx->current_buffer[buffer->last_target] != buffer,
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NULL);
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/* Don't allow nesting binds to the same target */
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_COGL_RETURN_VAL_IF_FAIL (ctx->current_buffer[target] == NULL, NULL);
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buffer->last_target = target;
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ctx->current_buffer[target] = buffer;
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if (buffer->flags & COGL_BUFFER_FLAG_BUFFER_OBJECT)
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{
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GLenum gl_target = convert_bind_target_to_gl_target (buffer->last_target);
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GE( ctx, glBindBuffer (gl_target, buffer->gl_handle) );
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return NULL;
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}
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else
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return buffer->data;
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}
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void *
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_cogl_buffer_gl_map_range (CoglBuffer *buffer,
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size_t offset,
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size_t size,
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CoglBufferAccess access,
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CoglBufferMapHint hints,
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CoglError **error)
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{
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uint8_t *data;
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CoglBufferBindTarget target;
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GLenum gl_target;
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CoglContext *ctx = buffer->context;
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GLenum gl_error;
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if (((access & COGL_BUFFER_ACCESS_READ) &&
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!cogl_has_feature (ctx, COGL_FEATURE_ID_MAP_BUFFER_FOR_READ)) ||
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((access & COGL_BUFFER_ACCESS_WRITE) &&
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!cogl_has_feature (ctx, COGL_FEATURE_ID_MAP_BUFFER_FOR_WRITE)))
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{
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_cogl_set_error (error,
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COGL_SYSTEM_ERROR,
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COGL_SYSTEM_ERROR_UNSUPPORTED,
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"Tried to map a buffer with unsupported access mode");
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return NULL;
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}
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target = buffer->last_target;
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_cogl_buffer_bind_no_create (buffer, target);
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gl_target = convert_bind_target_to_gl_target (target);
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/* If the map buffer range extension is supported then we will
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* always use it even if we are mapping the full range because the
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* normal mapping function doesn't support passing the discard
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* hints */
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if (ctx->glMapBufferRange)
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{
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GLbitfield gl_access = 0;
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if ((access & COGL_BUFFER_ACCESS_READ))
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gl_access |= GL_MAP_READ_BIT;
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if ((access & COGL_BUFFER_ACCESS_WRITE))
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gl_access |= GL_MAP_WRITE_BIT;
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if ((hints & COGL_BUFFER_MAP_HINT_DISCARD))
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gl_access |= GL_MAP_INVALIDATE_BUFFER_BIT;
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if ((hints & COGL_BUFFER_MAP_HINT_DISCARD_RANGE))
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gl_access |= GL_MAP_INVALIDATE_RANGE_BIT;
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if (!buffer->store_created)
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{
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if (!recreate_store (buffer, error))
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{
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_cogl_buffer_gl_unbind (buffer);
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return NULL;
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}
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}
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/* Clear any GL errors */
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while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
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;
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data = ctx->glMapBufferRange (gl_target,
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offset,
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size,
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gl_access);
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if (_cogl_gl_util_catch_out_of_memory (ctx, error))
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{
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_cogl_buffer_gl_unbind (buffer);
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return NULL;
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}
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_COGL_RETURN_VAL_IF_FAIL (data != NULL, NULL);
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}
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else
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{
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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 (!buffer->store_created ||
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(hints & COGL_BUFFER_MAP_HINT_DISCARD) ||
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((hints & COGL_BUFFER_MAP_HINT_DISCARD_RANGE) &&
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offset == 0 && size >= buffer->size))
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{
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if (!recreate_store (buffer, error))
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{
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_cogl_buffer_gl_unbind (buffer);
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return NULL;
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}
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}
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/* Clear any GL errors */
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while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
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;
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data = ctx->glMapBuffer (gl_target,
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_cogl_buffer_access_to_gl_enum (access));
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if (_cogl_gl_util_catch_out_of_memory (ctx, error))
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{
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_cogl_buffer_gl_unbind (buffer);
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return NULL;
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}
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_COGL_RETURN_VAL_IF_FAIL (data != NULL, NULL);
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data += offset;
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}
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if (data)
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buffer->flags |= COGL_BUFFER_FLAG_MAPPED;
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_cogl_buffer_gl_unbind (buffer);
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return data;
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}
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void
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_cogl_buffer_gl_unmap (CoglBuffer *buffer)
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{
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CoglContext *ctx = buffer->context;
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_cogl_buffer_bind_no_create (buffer, buffer->last_target);
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GE( ctx, glUnmapBuffer (convert_bind_target_to_gl_target
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(buffer->last_target)) );
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buffer->flags &= ~COGL_BUFFER_FLAG_MAPPED;
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_cogl_buffer_gl_unbind (buffer);
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}
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CoglBool
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_cogl_buffer_gl_set_data (CoglBuffer *buffer,
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unsigned int offset,
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const void *data,
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unsigned int size,
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CoglError **error)
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{
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CoglBufferBindTarget target;
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GLenum gl_target;
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CoglContext *ctx = buffer->context;
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GLenum gl_error;
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CoglBool status = TRUE;
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CoglError *internal_error = NULL;
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target = buffer->last_target;
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_cogl_buffer_gl_bind (buffer, target, &internal_error);
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/* NB: _cogl_buffer_gl_bind() may return NULL in non-error
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* conditions so we have to explicity check internal_error
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* to see if an exception was thrown.
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*/
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if (internal_error)
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{
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_cogl_propagate_error (error, internal_error);
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return FALSE;
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}
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gl_target = convert_bind_target_to_gl_target (target);
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/* Clear any GL errors */
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while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
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;
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ctx->glBufferSubData (gl_target, offset, size, data);
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if (_cogl_gl_util_catch_out_of_memory (ctx, error))
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status = FALSE;
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_cogl_buffer_gl_unbind (buffer);
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return status;
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}
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void *
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_cogl_buffer_gl_bind (CoglBuffer *buffer,
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CoglBufferBindTarget target,
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CoglError **error)
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{
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void *ret;
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ret = _cogl_buffer_bind_no_create (buffer, 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 ((buffer->flags & COGL_BUFFER_FLAG_BUFFER_OBJECT) &&
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!buffer->store_created)
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{
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if (!recreate_store (buffer, error))
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{
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_cogl_buffer_gl_unbind (buffer);
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return NULL;
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}
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}
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return ret;
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}
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void
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_cogl_buffer_gl_unbind (CoglBuffer *buffer)
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{
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CoglContext *ctx = buffer->context;
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_COGL_RETURN_IF_FAIL (buffer != NULL);
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/* the unbind should pair up with a previous bind */
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_COGL_RETURN_IF_FAIL (ctx->current_buffer[buffer->last_target] == buffer);
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if (buffer->flags & COGL_BUFFER_FLAG_BUFFER_OBJECT)
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{
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GLenum gl_target = convert_bind_target_to_gl_target (buffer->last_target);
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GE( ctx, glBindBuffer (gl_target, 0) );
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}
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ctx->current_buffer[buffer->last_target] = NULL;
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}
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