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/*
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/** \file marshal.h
*
* Declarations of functions related to marshalling GL calls from a client
* thread to a server thread.
*/
#ifndef MARSHAL_H
#define MARSHAL_H
#include "main/glthread.h"
#include "main/context.h"
struct marshal_cmd_base
{
/**
* Type of command. See enum marshal_dispatch_cmd_id.
*/
uint16_t cmd_id;
/**
* Size of command, in multiples of 4 bytes, including cmd_base.
*/
uint16_t cmd_size;
};
#ifdef HAVE_PTHREAD
static inline void *
_mesa_glthread_allocate_command(struct gl_context *ctx,
uint16_t cmd_id,
size_t size)
{
struct glthread_state *glthread = ctx->GLThread;
struct marshal_cmd_base *cmd_base;
if (unlikely(glthread->batch->used + size > MARSHAL_MAX_CMD_SIZE))
_mesa_glthread_flush_batch(ctx);
cmd_base = (struct marshal_cmd_base *)
&glthread->batch->buffer[glthread->batch->used];
glthread->batch->used += size;
cmd_base->cmd_id = cmd_id;
cmd_base->cmd_size = size;
return cmd_base;
}
/**
* Instead of conditionally handling marshaling previously-bound user vertex
* array data in draw calls (deprecated and removed in GL core), we just
* disable threading at the point where the user sets a user vertex array.
*/
static inline bool
_mesa_glthread_is_non_vbo_vertex_attrib_pointer(const struct gl_context *ctx)
{
struct glthread_state *glthread = ctx->GLThread;
return ctx->API != API_OPENGL_CORE && !glthread->vertex_array_is_vbo;
}
/**
* Instead of conditionally handling marshaling immediate index data in draw
* calls (deprecated and removed in GL core), we just disable threading.
*/
static inline bool
_mesa_glthread_is_non_vbo_draw_elements(const struct gl_context *ctx)
{
struct glthread_state *glthread = ctx->GLThread;
return ctx->API != API_OPENGL_CORE && !glthread->element_array_is_vbo;
}
#else
/* FIXME: dummy functions for non PTHREAD platforms */
static inline void *
_mesa_glthread_allocate_command(struct gl_context *ctx,
uint16_t cmd_id,
size_t size)
{
return NULL;
}
static inline bool
_mesa_glthread_is_non_vbo_vertex_attrib_pointer(const struct gl_context *ctx)
{
return false;
}
static inline bool
_mesa_glthread_is_non_vbo_draw_elements(const struct gl_context *ctx)
{
return false;
}
#endif
#define DEBUG_MARSHAL_PRINT_CALLS 0
static inline void
debug_print_sync(const char *func)
{
#if DEBUG_MARSHAL_PRINT_CALLS
printf("sync: %s\n", func);
#endif
}
static inline void
debug_print_marshal(const char *func)
{
#if DEBUG_MARSHAL_PRINT_CALLS
printf("marshal: %s\n", func);
#endif
}
static inline void
debug_print_unmarshal(const char *func)
{
#if DEBUG_MARSHAL_PRINT_CALLS
printf("unmarshal: %s\n", func);
#endif
}
struct _glapi_table *
_mesa_create_marshal_table(const struct gl_context *ctx);
size_t
_mesa_unmarshal_dispatch_cmd(struct gl_context *ctx, const void *cmd);
static inline void
_mesa_post_marshal_hook(struct gl_context *ctx)
{
/* This can be enabled for debugging whether a failure is a synchronization
* problem between the main thread and the worker thread, or a failure in
* how we actually marshal.
*/
if (false)
_mesa_glthread_finish(ctx);
}
/**
* Checks whether we're on a compat context for code-generated
* glBindVertexArray().
*
* In order to decide whether a draw call uses only VBOs for vertex and index
* buffers, we track the current vertex and index buffer bindings by
* glBindBuffer(). However, the index buffer binding is stored in the vertex
* array as opposed to the context. If we were to accurately track whether
* the index buffer was a user pointer ot not, we'd have to track it per
* vertex array, which would mean synchronizing with the client thread and
* looking into the hash table to find the actual vertex array object. That's
* more tracking than we'd like to do in the main thread, if possible.
*
* Instead, just punt for now and disable threading on apps using vertex
* arrays and compat contexts. Apps using vertex arrays can probably use a
* core context.
*/
static inline bool
_mesa_glthread_is_compat_bind_vertex_array(const struct gl_context *ctx)
{
return ctx->API != API_OPENGL_CORE;
}
struct marshal_cmd_ShaderSource;
struct marshal_cmd_Flush;
struct marshal_cmd_BindBuffer;
void GLAPIENTRY
_mesa_marshal_ShaderSource(GLuint shader, GLsizei count,
const GLchar * const *string, const GLint *length);
void
_mesa_unmarshal_ShaderSource(struct gl_context *ctx,
const struct marshal_cmd_ShaderSource *cmd);
void GLAPIENTRY
_mesa_marshal_Flush(void);
void
_mesa_unmarshal_Flush(struct gl_context *ctx,
const struct marshal_cmd_Flush *cmd);
void GLAPIENTRY
_mesa_marshal_BindBuffer(GLenum target, GLuint buffer);
void
_mesa_unmarshal_BindBuffer(struct gl_context *ctx,
const struct marshal_cmd_BindBuffer *cmd);
#endif /* MARSHAL_H */
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