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/*

 * Copyright 2010 Red Hat Inc.

 *

 * 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

 * on the rights to use, copy, modify, merge, publish, distribute, sub

 * license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS 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.

 */

#include 

#include 

#include "pipe/p_defines.h"

#include "pipe/p_state.h"

#include "pipe/p_context.h"

#include "pipe/p_screen.h"

#include "util/u_memory.h"

#include "util/u_inlines.h"

#include "util/u_format.h"

#include "noop_public.h"

DEBUG_GET_ONCE_BOOL_OPTION(noop, "GALLIUM_NOOP", FALSE)

void noop_init_state_functions(struct pipe_context *ctx);

struct noop_pipe_screen {

	struct pipe_screen	pscreen;

	struct pipe_screen	*oscreen;

};

/*

 * query

 */

struct noop_query {

	unsigned	query;

};

static struct pipe_query *noop_create_query(struct pipe_context *ctx, unsigned query_type)

{

	struct noop_query *query = CALLOC_STRUCT(noop_query);

	return (struct pipe_query *)query;

}

static void noop_destroy_query(struct pipe_context *ctx, struct pipe_query *query)

{

	FREE(query);

}

static void noop_begin_query(struct pipe_context *ctx, struct pipe_query *query)

{

}

static void noop_end_query(struct pipe_context *ctx, struct pipe_query *query)

{

}

static boolean noop_get_query_result(struct pipe_context *ctx,

					struct pipe_query *query,

					boolean wait,

					union pipe_query_result *vresult)

{

	uint64_t *result = (uint64_t*)vresult;

	*result = 0;

	return TRUE;

}

/*

 * resource

 */

struct noop_resource {

	struct pipe_resource	base;

	unsigned		size;

	char			*data;

	struct sw_displaytarget	*dt;

};

static struct pipe_resource *noop_resource_create(struct pipe_screen *screen,

						const struct pipe_resource *templ)

{

	struct noop_resource *nresource;

	unsigned stride;

	nresource = CALLOC_STRUCT(noop_resource);

	if (nresource == NULL)

		return NULL;

	stride = util_format_get_stride(templ->format, templ->width0);

	nresource->base = *templ;

	nresource->base.screen = screen;

	nresource->size = stride * templ->height0 * templ->depth0;

	nresource->data = MALLOC(nresource->size);

	pipe_reference_init(&nresource->base.reference, 1);

	if (nresource->data == NULL) {

		FREE(nresource);

		return NULL;

	}

	return &nresource->base;

}

static struct pipe_resource *noop_resource_from_handle(struct pipe_screen *screen,

							const struct pipe_resource *templ,

							struct winsys_handle *handle)

{

	struct noop_pipe_screen *noop_screen = (struct noop_pipe_screen*)screen;

	struct pipe_screen *oscreen = noop_screen->oscreen;

	struct pipe_resource *result;

	struct pipe_resource *noop_resource;

	result = oscreen->resource_from_handle(oscreen, templ, handle);

	noop_resource = noop_resource_create(screen, result);

	pipe_resource_reference(&result, NULL);

	return noop_resource;

}

static boolean noop_resource_get_handle(struct pipe_screen *screen,

					struct pipe_resource *resource,

					struct winsys_handle *handle)

{

	return FALSE;

}

static void noop_resource_destroy(struct pipe_screen *screen,

					struct pipe_resource *resource)

{

	struct noop_resource *nresource = (struct noop_resource *)resource;

	FREE(nresource->data);

	FREE(resource);

}

/*

 * transfer

 */

static void *noop_transfer_map(struct pipe_context *pipe,

                               struct pipe_resource *resource,

                               unsigned level,

                               enum pipe_transfer_usage usage,

                               const struct pipe_box *box,

                               struct pipe_transfer **ptransfer)

{

   struct pipe_transfer *transfer;

   struct noop_resource *nresource = (struct noop_resource *)resource;

   transfer = CALLOC_STRUCT(pipe_transfer);

   if (transfer == NULL)

           return NULL;

   pipe_resource_reference(&transfer->resource, resource);

   transfer->level = level;

   transfer->usage = usage;

   transfer->box = *box;

   transfer->stride = 1;

   transfer->layer_stride = 1;

   *ptransfer = transfer;

   return nresource->data;

}

static void noop_transfer_flush_region(struct pipe_context *pipe,

					struct pipe_transfer *transfer,

					const struct pipe_box *box)

{

}

static void noop_transfer_unmap(struct pipe_context *pipe,

				struct pipe_transfer *transfer)

{

   pipe_resource_reference(&transfer->resource, NULL);

   FREE(transfer);

}

static void noop_transfer_inline_write(struct pipe_context *pipe,

					struct pipe_resource *resource,

					unsigned level,

					unsigned usage,

					const struct pipe_box *box,

					const void *data,

					unsigned stride,

					unsigned layer_stride)

{

}

/*

 * clear/copy

 */

static void noop_clear(struct pipe_context *ctx, unsigned buffers,

		       const union pipe_color_union *color, double depth, unsigned stencil)

{

}

static void noop_clear_render_target(struct pipe_context *ctx,

				     struct pipe_surface *dst,

				     const union pipe_color_union *color,

				     unsigned dstx, unsigned dsty,

				     unsigned width, unsigned height)

{

}

static void noop_clear_depth_stencil(struct pipe_context *ctx,

				     struct pipe_surface *dst,

				     unsigned clear_flags,

				     double depth,

				     unsigned stencil,

				     unsigned dstx, unsigned dsty,

				     unsigned width, unsigned height)

{

}

static void noop_resource_copy_region(struct pipe_context *ctx,

				      struct pipe_resource *dst,

				      unsigned dst_level,

				      unsigned dstx, unsigned dsty, unsigned dstz,

				      struct pipe_resource *src,

				      unsigned src_level,

				      const struct pipe_box *src_box)

{

}

static void noop_blit(struct pipe_context *ctx,

                      const struct pipe_blit_info *info)

{

}

/*

 * context

 */

static void noop_flush(struct pipe_context *ctx,

                       struct pipe_fence_handle **fence,

                       unsigned flags)

{

}

static void noop_destroy_context(struct pipe_context *ctx)

{

	FREE(ctx);

}

static struct pipe_context *noop_create_context(struct pipe_screen *screen, void *priv)

{

	struct pipe_context *ctx = CALLOC_STRUCT(pipe_context);

	if (ctx == NULL)

		return NULL;

	ctx->screen = screen;

	ctx->priv = priv;

	ctx->destroy = noop_destroy_context;

	ctx->flush = noop_flush;

	ctx->clear = noop_clear;

	ctx->clear_render_target = noop_clear_render_target;

	ctx->clear_depth_stencil = noop_clear_depth_stencil;

	ctx->resource_copy_region = noop_resource_copy_region;

	ctx->blit = noop_blit;

	ctx->create_query = noop_create_query;

	ctx->destroy_query = noop_destroy_query;

	ctx->begin_query = noop_begin_query;

	ctx->end_query = noop_end_query;

	ctx->get_query_result = noop_get_query_result;

	ctx->transfer_map = noop_transfer_map;

	ctx->transfer_flush_region = noop_transfer_flush_region;

	ctx->transfer_unmap = noop_transfer_unmap;

	ctx->transfer_inline_write = noop_transfer_inline_write;

	noop_init_state_functions(ctx);

	return ctx;

}

/*

 * pipe_screen

 */

static void noop_flush_frontbuffer(struct pipe_screen *_screen,

				   struct pipe_resource *resource,

				   unsigned level, unsigned layer,

				   void *context_private)

{

}

static const char *noop_get_vendor(struct pipe_screen* pscreen)

{

	return "X.Org";

}

static const char *noop_get_name(struct pipe_screen* pscreen)

{

	return "NOOP";

}

static int noop_get_param(struct pipe_screen* pscreen, enum pipe_cap param)

{

	struct pipe_screen *screen = ((struct noop_pipe_screen*)pscreen)->oscreen;

	return screen->get_param(screen, param);

}

static float noop_get_paramf(struct pipe_screen* pscreen,

			     enum pipe_capf param)

{

	struct pipe_screen *screen = ((struct noop_pipe_screen*)pscreen)->oscreen;

	return screen->get_paramf(screen, param);

}

static int noop_get_shader_param(struct pipe_screen* pscreen, unsigned shader, enum pipe_shader_cap param)

{

	struct pipe_screen *screen = ((struct noop_pipe_screen*)pscreen)->oscreen;

	return screen->get_shader_param(screen, shader, param);

}

static boolean noop_is_format_supported(struct pipe_screen* pscreen,

					enum pipe_format format,

					enum pipe_texture_target target,

					unsigned sample_count,

                                        unsigned usage)

{

	struct pipe_screen *screen = ((struct noop_pipe_screen*)pscreen)->oscreen;

	return screen->is_format_supported(screen, format, target, sample_count, usage);

}

static uint64_t noop_get_timestamp(struct pipe_screen *pscreen)

{

	return 0;

}

static void noop_destroy_screen(struct pipe_screen *screen)

{

	struct noop_pipe_screen *noop_screen = (struct noop_pipe_screen*)screen;

	struct pipe_screen *oscreen = noop_screen->oscreen;

	oscreen->destroy(oscreen);

	FREE(screen);

}

struct pipe_screen *noop_screen_create(struct pipe_screen *oscreen)

{

	struct noop_pipe_screen *noop_screen;

	struct pipe_screen *screen;

	if (!debug_get_option_noop()) {

		return oscreen;

	}

	noop_screen = CALLOC_STRUCT(noop_pipe_screen);

	if (noop_screen == NULL) {

		return NULL;

	}

	noop_screen->oscreen = oscreen;

	screen = &noop_screen->pscreen;

	screen->destroy = noop_destroy_screen;

	screen->get_name = noop_get_name;

	screen->get_vendor = noop_get_vendor;

	screen->get_param = noop_get_param;

	screen->get_shader_param = noop_get_shader_param;

	screen->get_paramf = noop_get_paramf;

	screen->is_format_supported = noop_is_format_supported;

	screen->context_create = noop_create_context;

	screen->resource_create = noop_resource_create;

	screen->resource_from_handle = noop_resource_from_handle;

	screen->resource_get_handle = noop_resource_get_handle;

	screen->resource_destroy = noop_resource_destroy;

	screen->flush_frontbuffer = noop_flush_frontbuffer;

        screen->get_timestamp = noop_get_timestamp;

	return screen;

}