/*
 * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
 *
 * 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 <robclark@freedesktop.org>
 */


#include "fd2_context.h"
#include "fd2_blend.h"
#include "fd2_draw.h"
#include "fd2_emit.h"
#include "fd2_gmem.h"
#include "fd2_program.h"
#include "fd2_rasterizer.h"
#include "fd2_texture.h"
#include "fd2_zsa.h"

static void
fd2_context_destroy(struct pipe_context *pctx)
{
	fd_context_destroy(pctx);
	free(pctx);
}

static struct pipe_resource *
create_solid_vertexbuf(struct pipe_context *pctx)
{
	static const float init_shader_const[] = {
			/* for clear/gmem2mem: */
			-1.000000, +1.000000, +1.000000, +1.100000,
			+1.000000, +1.000000, -1.000000, -1.100000,
			+1.000000, +1.100000, -1.100000, +1.000000,
			/* for mem2gmem: (vertices) */
			-1.000000, +1.000000, +1.000000, +1.000000,
			+1.000000, +1.000000, -1.000000, -1.000000,
			+1.000000, +1.000000, -1.000000, +1.000000,
			/* for mem2gmem: (tex coords) */
			+0.000000, +0.000000, +1.000000, +0.000000,
			+0.000000, +1.000000, +1.000000, +1.000000,
	};
	struct pipe_resource *prsc = pipe_buffer_create(pctx->screen,
			PIPE_BIND_CUSTOM, PIPE_USAGE_IMMUTABLE, sizeof(init_shader_const));
	pipe_buffer_write(pctx, prsc, 0,
			sizeof(init_shader_const), init_shader_const);
	return prsc;
}

static const uint8_t a22x_primtypes[PIPE_PRIM_MAX] = {
		[PIPE_PRIM_POINTS]         = DI_PT_POINTLIST_PSIZE,
		[PIPE_PRIM_LINES]          = DI_PT_LINELIST,
		[PIPE_PRIM_LINE_STRIP]     = DI_PT_LINESTRIP,
		[PIPE_PRIM_LINE_LOOP]      = DI_PT_LINELOOP,
		[PIPE_PRIM_TRIANGLES]      = DI_PT_TRILIST,
		[PIPE_PRIM_TRIANGLE_STRIP] = DI_PT_TRISTRIP,
		[PIPE_PRIM_TRIANGLE_FAN]   = DI_PT_TRIFAN,
};

static const uint8_t a20x_primtypes[PIPE_PRIM_MAX] = {
		[PIPE_PRIM_POINTS]         = DI_PT_POINTLIST_PSIZE,
		[PIPE_PRIM_LINES]          = DI_PT_LINELIST,
		[PIPE_PRIM_LINE_STRIP]     = DI_PT_LINESTRIP,
		[PIPE_PRIM_TRIANGLES]      = DI_PT_TRILIST,
		[PIPE_PRIM_TRIANGLE_STRIP] = DI_PT_TRISTRIP,
		[PIPE_PRIM_TRIANGLE_FAN]   = DI_PT_TRIFAN,
};

struct pipe_context *
fd2_context_create(struct pipe_screen *pscreen, void *priv, unsigned flags)
{
	struct fd_screen *screen = fd_screen(pscreen);
	struct fd2_context *fd2_ctx = CALLOC_STRUCT(fd2_context);
	struct pipe_context *pctx;

	if (!fd2_ctx)
		return NULL;

	pctx = &fd2_ctx->base.base;

	fd2_ctx->base.dev = fd_device_ref(screen->dev);
	fd2_ctx->base.screen = fd_screen(pscreen);

	pctx->destroy = fd2_context_destroy;
	pctx->create_blend_state = fd2_blend_state_create;
	pctx->create_rasterizer_state = fd2_rasterizer_state_create;
	pctx->create_depth_stencil_alpha_state = fd2_zsa_state_create;

	fd2_draw_init(pctx);
	fd2_gmem_init(pctx);
	fd2_texture_init(pctx);
	fd2_prog_init(pctx);
	fd2_emit_init(pctx);

	pctx = fd_context_init(&fd2_ctx->base, pscreen,
			(screen->gpu_id >= 220) ? a22x_primtypes : a20x_primtypes,
			priv, flags);
	if (!pctx)
		return NULL;

	/* construct vertex state used for solid ops (clear, and gmem<->mem) */
	fd2_ctx->solid_vertexbuf = create_solid_vertexbuf(pctx);

	return pctx;
}