/*
 * Copyright 2010 Jerome Glisse <glisse@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
 * 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.
 *
 * Authors:
 *      Jerome Glisse
 *      Corbin Simpson
 */
#include <util/u_inlines.h>
#include <util/u_format.h>
#include <util/u_memory.h>
#include "r600_resource.h"
#include "r600_screen.h"
#include "r600_texture.h"
#include "r600_context.h"
#include <stdio.h>

static const char* r600_get_vendor(struct pipe_screen* pscreen)
{
	return "X.Org";
}

static const char* r600_get_name(struct pipe_screen* pscreen)
{
	return "R600/R700 (HD2XXX,HD3XXX,HD4XXX)";
}

static int r600_get_param(struct pipe_screen* pscreen, int param)
{
	switch (param) {
	case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
	case PIPE_CAP_MAX_COMBINED_SAMPLERS:
		return 16;
	case PIPE_CAP_NPOT_TEXTURES:
		return 1;
	case PIPE_CAP_TWO_SIDED_STENCIL:
		return 1;
	case PIPE_CAP_GLSL:
		return 1;
	case PIPE_CAP_DUAL_SOURCE_BLEND:
		return 1;
	case PIPE_CAP_ANISOTROPIC_FILTER:
		return 1;
	case PIPE_CAP_POINT_SPRITE:
		return 1;
	case PIPE_CAP_MAX_RENDER_TARGETS:
		/* FIXME some r6xx are buggy and can only do 4 */
		return 8;
	case PIPE_CAP_OCCLUSION_QUERY:
		return 1;
	case PIPE_CAP_TEXTURE_SHADOW_MAP:
		return 1;
	case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
	case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
	case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
		/* FIXME not sure here */
		return 13;
	case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
		return 1;
	case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
		return 1;
	case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
		/* FIXME allow this once infrastructure is there */
		return 0;
	case PIPE_CAP_TGSI_CONT_SUPPORTED:
		return 0;
	case PIPE_CAP_BLEND_EQUATION_SEPARATE:
		return 1;
	case PIPE_CAP_SM3:
		return 1;
	case PIPE_CAP_INDEP_BLEND_ENABLE:
		return 1;
	case PIPE_CAP_INDEP_BLEND_FUNC:
		/* FIXME allow this */
		return 0;
	case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
	case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
		return 1;
	case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
	case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
		return 0;
	default:
		debug_printf("r600: unknown param %d\n", param);
		return 0;
	}
}

static float r600_get_paramf(struct pipe_screen* pscreen, int param)
{
	switch (param) {
	case PIPE_CAP_MAX_LINE_WIDTH:
	case PIPE_CAP_MAX_LINE_WIDTH_AA:
	case PIPE_CAP_MAX_POINT_WIDTH:
	case PIPE_CAP_MAX_POINT_WIDTH_AA:
		return 8192.0f;
	case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
		return 16.0f;
	case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
		return 16.0f;
	default:
		debug_printf("r600: unsupported paramf %d\n", param);
		return 0.0f;
	}
}

static boolean r600_is_format_supported(struct pipe_screen* screen,
					enum pipe_format format,
					enum pipe_texture_target target,
					unsigned usage,
					unsigned geom_flags)
{
	if (target >= PIPE_MAX_TEXTURE_TYPES) {
		debug_printf("r600: unsupported texture type %d\n", target);
		return FALSE;
	}
	switch (format) {
	case PIPE_FORMAT_B4G4R4A4_UNORM:
	case PIPE_FORMAT_B5G6R5_UNORM:
	case PIPE_FORMAT_B5G5R5A1_UNORM:
	case PIPE_FORMAT_A8_UNORM:
	case PIPE_FORMAT_L8_UNORM:
	case PIPE_FORMAT_A8R8G8B8_SRGB:
	case PIPE_FORMAT_R8G8B8A8_SRGB:
	case PIPE_FORMAT_DXT1_RGB:
	case PIPE_FORMAT_DXT1_RGBA:
	case PIPE_FORMAT_DXT3_RGBA:
	case PIPE_FORMAT_DXT5_RGBA:
	case PIPE_FORMAT_UYVY:
	case PIPE_FORMAT_L8_SRGB:
	case PIPE_FORMAT_L8A8_SRGB:
	case PIPE_FORMAT_L8A8_UNORM:
	case PIPE_FORMAT_A8R8G8B8_UNORM:
	case PIPE_FORMAT_X8R8G8B8_UNORM:
	case PIPE_FORMAT_R8G8B8A8_UNORM:
	case PIPE_FORMAT_R8G8B8X8_UNORM:
	case PIPE_FORMAT_B8G8R8A8_UNORM:
	case PIPE_FORMAT_B8G8R8X8_UNORM:
	case PIPE_FORMAT_A8B8G8R8_SRGB:
	case PIPE_FORMAT_B8G8R8A8_SRGB:
	case PIPE_FORMAT_I8_UNORM:
	case PIPE_FORMAT_Z16_UNORM:
	case PIPE_FORMAT_X8Z24_UNORM:
	case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
	case PIPE_FORMAT_Z32_UNORM:
	case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
	case PIPE_FORMAT_Z24X8_UNORM:
		return TRUE;
	default:
		/* Unknown format... */
		break;
	}
	return FALSE;
}

struct pipe_transfer* r600_texture_get_transfer(struct pipe_context *ctx,
						struct pipe_resource *texture,
						struct pipe_subresource sr,
						unsigned usage,
						const struct pipe_box *box)
{
	struct r600_texture *rtex = (struct r600_texture*)texture;
	struct r600_transfer *trans;

	trans = CALLOC_STRUCT(r600_transfer);
	if (trans == NULL)
		return NULL;
	pipe_resource_reference(&trans->transfer.resource, texture);
	trans->transfer.sr = sr;
	trans->transfer.usage = usage;
	trans->transfer.box = *box;
	trans->transfer.stride = rtex->stride[sr.level];
	trans->offset = r600_texture_get_offset(rtex, sr.level, box->z, sr.face);
	return &trans->transfer;
}

void r600_texture_transfer_destroy(struct pipe_context *ctx,
				   struct pipe_transfer *trans)
{
	pipe_resource_reference(&trans->resource, NULL);
	FREE(trans);
}

void* r600_texture_transfer_map(struct pipe_context *ctx,
				struct pipe_transfer* transfer)
{
	struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
	struct r600_texture *rtex = (struct r600_texture*)transfer->resource;
	char *map;
	enum pipe_format format = rtex->b.b.format;

	map = pipe_buffer_map(ctx, rtex->buffer,
			      transfer->usage,
			      &rtransfer->buffer_transfer);

	if (!map) {
		return NULL;
	}

	return map + rtransfer->offset +
		transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
		transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
}

void r600_texture_transfer_unmap(struct pipe_context *ctx,
				 struct pipe_transfer* transfer)
{
	struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
	struct r600_texture *rtex = (struct r600_texture*)transfer->resource;

	pipe_buffer_unmap(ctx, rtex->buffer, rtransfer->buffer_transfer);
}

static void r600_destroy_screen(struct pipe_screen* pscreen)
{
	struct r600_screen* rscreen = r600_screen(pscreen);

	if (rscreen == NULL)
		return;
	FREE(rscreen);
}

struct pipe_screen *radeon_create_screen(struct radeon *rw)
{
	struct r600_screen* rscreen;

	rscreen = CALLOC_STRUCT(r600_screen);
	if (rscreen == NULL) {
		return NULL;
	}
	rscreen->rw = rw;
	rscreen->screen.winsys = (struct pipe_winsys*)rw;
	rscreen->screen.destroy = r600_destroy_screen;
	rscreen->screen.get_name = r600_get_name;
	rscreen->screen.get_vendor = r600_get_vendor;
	rscreen->screen.get_param = r600_get_param;
	rscreen->screen.get_paramf = r600_get_paramf;
	rscreen->screen.is_format_supported = r600_is_format_supported;
	rscreen->screen.context_create = r600_create_context;
	r600_init_screen_texture_functions(&rscreen->screen);
	r600_init_screen_resource_functions(rscreen);
	return &rscreen->screen;
}