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/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */

/*

 * Copyright (C) 2012 Rob Clark 

 *

 * 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.

 *

 * Authors:

 *    Rob Clark 

 */

#include "util/u_format.h"

#include "util/u_inlines.h"

#include "util/u_transfer.h"

#include "util/u_string.h"

#include "util/u_surface.h"

#include "freedreno_resource.h"

#include "freedreno_screen.h"

#include "freedreno_surface.h"

#include "freedreno_context.h"

#include "freedreno_util.h"

static void fd_resource_transfer_flush_region(struct pipe_context *pctx,

		struct pipe_transfer *ptrans,

		const struct pipe_box *box)

{

	struct fd_context *ctx = fd_context(pctx);

	struct fd_resource *rsc = fd_resource(ptrans->resource);

	if (rsc->dirty)

		fd_context_render(pctx);

	if (rsc->timestamp) {

		fd_pipe_wait(ctx->screen->pipe, rsc->timestamp);

		rsc->timestamp = 0;

	}

}

static void

fd_resource_transfer_unmap(struct pipe_context *pctx,

		struct pipe_transfer *ptrans)

{

	struct fd_context *ctx = fd_context(pctx);

	struct fd_resource *rsc = fd_resource(ptrans->resource);

	if (!(ptrans->usage & PIPE_TRANSFER_UNSYNCHRONIZED))

		fd_bo_cpu_fini(rsc->bo);

	pipe_resource_reference(&ptrans->resource, NULL);

	util_slab_free(&ctx->transfer_pool, ptrans);

}

static void *

fd_resource_transfer_map(struct pipe_context *pctx,

		struct pipe_resource *prsc,

		unsigned level, unsigned usage,

		const struct pipe_box *box,

		struct pipe_transfer **pptrans)

{

	struct fd_context *ctx = fd_context(pctx);

	struct fd_resource *rsc = fd_resource(prsc);

	struct pipe_transfer *ptrans = util_slab_alloc(&ctx->transfer_pool);

	enum pipe_format format = prsc->format;

	uint32_t op = 0;

	char *buf;

	if (!ptrans)

		return NULL;

	/* util_slab_alloc() doesn't zero: */

	memset(ptrans, 0, sizeof(*ptrans));

	pipe_resource_reference(&ptrans->resource, prsc);

	ptrans->level = level;

	ptrans->usage = usage;

	ptrans->box = *box;

	ptrans->stride = rsc->pitch * rsc->cpp;

	ptrans->layer_stride = ptrans->stride;

	/* some state trackers (at least XA) don't do this.. */

	if (!(usage & PIPE_TRANSFER_FLUSH_EXPLICIT))

		fd_resource_transfer_flush_region(pctx, ptrans, box);

	buf = fd_bo_map(rsc->bo);

	if (!buf) {

		fd_resource_transfer_unmap(pctx, ptrans);

		return NULL;

	}

	if (usage & PIPE_TRANSFER_READ)

		op |= DRM_FREEDRENO_PREP_READ;

	if (usage & PIPE_TRANSFER_WRITE)

		op |= DRM_FREEDRENO_PREP_WRITE;

	if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED))

		fd_bo_cpu_prep(rsc->bo, ctx->screen->pipe, op);

	*pptrans = ptrans;

	return buf +

		box->y / util_format_get_blockheight(format) * ptrans->stride +

		box->x / util_format_get_blockwidth(format) * rsc->cpp;

}

static void

fd_resource_destroy(struct pipe_screen *pscreen,

		struct pipe_resource *prsc)

{

	struct fd_resource *rsc = fd_resource(prsc);

	fd_bo_del(rsc->bo);

	FREE(rsc);

}

static boolean

fd_resource_get_handle(struct pipe_screen *pscreen,

		struct pipe_resource *prsc,

		struct winsys_handle *handle)

{

	struct fd_resource *rsc = fd_resource(prsc);

	return fd_screen_bo_get_handle(pscreen, rsc->bo,

			rsc->pitch * rsc->cpp, handle);

}

static const struct u_resource_vtbl fd_resource_vtbl = {

		.resource_get_handle      = fd_resource_get_handle,

		.resource_destroy         = fd_resource_destroy,

		.transfer_map             = fd_resource_transfer_map,

		.transfer_flush_region    = fd_resource_transfer_flush_region,

		.transfer_unmap           = fd_resource_transfer_unmap,

		.transfer_inline_write    = u_default_transfer_inline_write,

};

/**

 * Create a new texture object, using the given template info.

 */

static struct pipe_resource *

fd_resource_create(struct pipe_screen *pscreen,

		const struct pipe_resource *tmpl)

{

	struct fd_screen *screen = fd_screen(pscreen);

	struct fd_resource *rsc = CALLOC_STRUCT(fd_resource);

	struct pipe_resource *prsc = &rsc->base.b;

	uint32_t flags, size;

	DBG("target=%d, format=%s, %ux%u@%u, array_size=%u, last_level=%u, "

			"nr_samples=%u, usage=%u, bind=%x, flags=%x",

			tmpl->target, util_format_name(tmpl->format),

			tmpl->width0, tmpl->height0, tmpl->depth0,

			tmpl->array_size, tmpl->last_level, tmpl->nr_samples,

			tmpl->usage, tmpl->bind, tmpl->flags);

	if (!rsc)

		return NULL;

	*prsc = *tmpl;

	pipe_reference_init(&prsc->reference, 1);

	prsc->screen = pscreen;

	rsc->base.vtbl = &fd_resource_vtbl;

	rsc->pitch = align(tmpl->width0, 32);

	rsc->cpp = util_format_get_blocksize(tmpl->format);

	assert(rsc->cpp);

	size = rsc->pitch * tmpl->height0 * rsc->cpp;

	flags = DRM_FREEDRENO_GEM_CACHE_WCOMBINE |

			DRM_FREEDRENO_GEM_TYPE_KMEM; /* TODO */

	rsc->bo = fd_bo_new(screen->dev, size, flags);

	return prsc;

}

/**

 * Create a texture from a winsys_handle. The handle is often created in

 * another process by first creating a pipe texture and then calling

 * resource_get_handle.

 */

static struct pipe_resource *

fd_resource_from_handle(struct pipe_screen *pscreen,

		const struct pipe_resource *tmpl,

		struct winsys_handle *handle)

{

	struct fd_resource *rsc = CALLOC_STRUCT(fd_resource);

	struct pipe_resource *prsc = &rsc->base.b;

	DBG("target=%d, format=%s, %ux%u@%u, array_size=%u, last_level=%u, "

			"nr_samples=%u, usage=%u, bind=%x, flags=%x",

			tmpl->target, util_format_name(tmpl->format),

			tmpl->width0, tmpl->height0, tmpl->depth0,

			tmpl->array_size, tmpl->last_level, tmpl->nr_samples,

			tmpl->usage, tmpl->bind, tmpl->flags);

	if (!rsc)

		return NULL;

	*prsc = *tmpl;

	pipe_reference_init(&prsc->reference, 1);

	prsc->screen = pscreen;

	rsc->bo = fd_screen_bo_from_handle(pscreen, handle, &rsc->pitch);

	rsc->base.vtbl = &fd_resource_vtbl;

	rsc->cpp = util_format_get_blocksize(tmpl->format);

	rsc->pitch /= rsc->cpp;

	assert(rsc->cpp);

	return prsc;

}

static bool render_blit(struct pipe_context *pctx, struct pipe_blit_info *info);

/**

 * Copy a block of pixels from one resource to another.

 * The resource must be of the same format.

 * Resources with nr_samples > 1 are not allowed.

 */

static void

fd_resource_copy_region(struct pipe_context *pctx,

		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)

{

	/* TODO if we have 2d core, or other DMA engine that could be used

	 * for simple copies and reasonably easily synchronized with the 3d

	 * core, this is where we'd plug it in..

	 */

	struct pipe_blit_info info = {

		.dst = {

			.resource = dst,

			.box = {

				.x      = dstx,

				.y      = dsty,

				.z      = dstz,

				.width  = src_box->width,

				.height = src_box->height,

				.depth  = src_box->depth,

			},

			.format = util_format_linear(dst->format),

		},

		.src = {

			.resource = src,

			.box      = *src_box,

			.format   = util_format_linear(src->format),

		},

		.mask = PIPE_MASK_RGBA,

		.filter = PIPE_TEX_FILTER_NEAREST,

	};

	render_blit(pctx, &info);

}

/* Optimal hardware path for blitting pixels.

 * Scaling, format conversion, up- and downsampling (resolve) are allowed.

 */

static void

fd_blit(struct pipe_context *pctx, const struct pipe_blit_info *blit_info)

{

	struct pipe_blit_info info = *blit_info;

	if (info.src.resource->nr_samples > 1 &&

			info.dst.resource->nr_samples <= 1 &&

			!util_format_is_depth_or_stencil(info.src.resource->format) &&

			!util_format_is_pure_integer(info.src.resource->format)) {

		DBG("color resolve unimplemented");

		return;

	}

	if (util_try_blit_via_copy_region(pctx, &info)) {

		return; /* done */

	}

	if (info.mask & PIPE_MASK_S) {

		DBG("cannot blit stencil, skipping");

		info.mask &= ~PIPE_MASK_S;

	}

	render_blit(pctx, &info);

}

static bool

render_blit(struct pipe_context *pctx, struct pipe_blit_info *info)

{

	struct fd_context *ctx = fd_context(pctx);

	if (!util_blitter_is_blit_supported(ctx->blitter, info)) {

		DBG("blit unsupported %s -> %s",

				util_format_short_name(info->src.resource->format),

				util_format_short_name(info->dst.resource->format));

		return false;

	}

	util_blitter_save_vertex_buffer_slot(ctx->blitter, ctx->vertexbuf.vb);

	util_blitter_save_vertex_elements(ctx->blitter, ctx->vtx);

	util_blitter_save_vertex_shader(ctx->blitter, ctx->prog.vp);

	util_blitter_save_rasterizer(ctx->blitter, ctx->rasterizer);

	util_blitter_save_viewport(ctx->blitter, &ctx->viewport);

	util_blitter_save_scissor(ctx->blitter, &ctx->scissor);

	util_blitter_save_fragment_shader(ctx->blitter, ctx->prog.fp);

	util_blitter_save_blend(ctx->blitter, ctx->blend);

	util_blitter_save_depth_stencil_alpha(ctx->blitter, ctx->zsa);

	util_blitter_save_stencil_ref(ctx->blitter, &ctx->stencil_ref);

	util_blitter_save_sample_mask(ctx->blitter, ctx->sample_mask);

	util_blitter_save_framebuffer(ctx->blitter, &ctx->framebuffer);

	util_blitter_save_fragment_sampler_states(ctx->blitter,

			ctx->fragtex.num_samplers,

			(void **)ctx->fragtex.samplers);

	util_blitter_save_fragment_sampler_views(ctx->blitter,

			ctx->fragtex.num_textures, ctx->fragtex.textures);

	util_blitter_blit(ctx->blitter, info);

	return true;

}

void

fd_resource_screen_init(struct pipe_screen *pscreen)

{

	pscreen->resource_create = fd_resource_create;

	pscreen->resource_from_handle = fd_resource_from_handle;

	pscreen->resource_get_handle = u_resource_get_handle_vtbl;

	pscreen->resource_destroy = u_resource_destroy_vtbl;

}

void

fd_resource_context_init(struct pipe_context *pctx)

{

	pctx->transfer_map = u_transfer_map_vtbl;

	pctx->transfer_flush_region = u_transfer_flush_region_vtbl;

	pctx->transfer_unmap = u_transfer_unmap_vtbl;

	pctx->transfer_inline_write = u_transfer_inline_write_vtbl;

	pctx->create_surface = fd_create_surface;

	pctx->surface_destroy = fd_surface_destroy;

	pctx->resource_copy_region = fd_resource_copy_region;

	pctx->blit = fd_blit;

}