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/*

 * Copyright (C) 2009 Francisco Jerez.

 * All Rights Reserved.

 *

 * 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 COPYRIGHT OWNER(S) AND/OR ITS 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 "nouveau_driver.h"

#include "nouveau_context.h"

#include "nouveau_fbo.h"

#include "nouveau_util.h"

#include "nv_object.xml.h"

#include "nv10_3d.xml.h"

#include "nv10_driver.h"

static inline unsigned

get_rt_format(mesa_format format)

{

	switch (format) {

	case MESA_FORMAT_B8G8R8X8_UNORM:

		return NV10_3D_RT_FORMAT_COLOR_X8R8G8B8;

	case MESA_FORMAT_B8G8R8A8_UNORM:

		return NV10_3D_RT_FORMAT_COLOR_A8R8G8B8;

	case MESA_FORMAT_B5G6R5_UNORM:

		return NV10_3D_RT_FORMAT_COLOR_R5G6B5;

	case MESA_FORMAT_Z_UNORM16:

		return NV10_3D_RT_FORMAT_DEPTH_Z16;

	case MESA_FORMAT_S8_UINT_Z24_UNORM:

		return NV10_3D_RT_FORMAT_DEPTH_Z24S8;

	default:

		assert(0);

	}

}

static void

setup_hierz_buffer(struct gl_context *ctx)

{

	struct nouveau_pushbuf *push = context_push(ctx);

	struct gl_framebuffer *fb = ctx->DrawBuffer;

	struct nouveau_framebuffer *nfb = to_nouveau_framebuffer(fb);

	unsigned pitch = align(fb->Width, 128),

		height = align(fb->Height, 2),

		size = pitch * height;

	if (!nfb->hierz.bo || nfb->hierz.bo->size != size) {

		union nouveau_bo_config config = {

			.nv04.surf_flags = NV04_BO_ZETA,

			.nv04.surf_pitch = 0

		};

		nouveau_bo_ref(NULL, &nfb->hierz.bo);

		nouveau_bo_new(context_dev(ctx), NOUVEAU_BO_VRAM, 0, size,

			       &config, &nfb->hierz.bo);

	}

	PUSH_SPACE(push, 11);

	BEGIN_NV04(push, NV17_3D(HIERZ_OFFSET), 1);

	PUSH_MTHDl(push, NV17_3D(HIERZ_OFFSET), BUFCTX_FB,

			 nfb->hierz.bo, 0, NOUVEAU_BO_VRAM | NOUVEAU_BO_RDWR);

	BEGIN_NV04(push, NV17_3D(HIERZ_WINDOW_X), 4);

	PUSH_DATAf(push, - 1792);

	PUSH_DATAf(push, - 2304 + fb->Height);

	PUSH_DATAf(push, fb->_DepthMaxF / 2);

	PUSH_DATAf(push, 0);

	BEGIN_NV04(push, NV17_3D(HIERZ_PITCH), 1);

	PUSH_DATA (push, pitch);

	BEGIN_NV04(push, NV17_3D(HIERZ_ENABLE), 1);

	PUSH_DATA (push, 1);

}

void

nv10_emit_framebuffer(struct gl_context *ctx, int emit)

{

	struct nouveau_pushbuf *push = context_push(ctx);

	struct gl_framebuffer *fb = ctx->DrawBuffer;

	struct nouveau_surface *s;

	unsigned rt_format = NV10_3D_RT_FORMAT_TYPE_LINEAR;

	unsigned rt_pitch = 0, zeta_pitch = 0;

	unsigned bo_flags = NOUVEAU_BO_VRAM | NOUVEAU_BO_RDWR;

	if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT)

		return;

	PUSH_RESET(push, BUFCTX_FB);

	/* At least nv11 seems to get sad if we don't do this before

	 * swapping RTs.*/

	if (context_eng3d(ctx)->oclass < NV17_3D_CLASS) {

		int i;

		for (i = 0; i < 6; i++) {

			BEGIN_NV04(push, NV04_GRAPH(3D, NOP), 1);

			PUSH_DATA (push, 0);

		}

	}

	/* Render target */

	if (fb->_ColorDrawBuffers[0]) {

		s = &to_nouveau_renderbuffer(

			fb->_ColorDrawBuffers[0])->surface;

		rt_format |= get_rt_format(s->format);

		zeta_pitch = rt_pitch = s->pitch;

		BEGIN_NV04(push, NV10_3D(COLOR_OFFSET), 1);

		PUSH_MTHDl(push, NV10_3D(COLOR_OFFSET), BUFCTX_FB,

				 s->bo, 0, bo_flags);

	}

	/* depth/stencil */

	if (fb->Attachment[BUFFER_DEPTH].Renderbuffer) {

		s = &to_nouveau_renderbuffer(

			fb->Attachment[BUFFER_DEPTH].Renderbuffer)->surface;

		rt_format |= get_rt_format(s->format);

		zeta_pitch = s->pitch;

		BEGIN_NV04(push, NV10_3D(ZETA_OFFSET), 1);

		PUSH_MTHDl(push, NV10_3D(ZETA_OFFSET), BUFCTX_FB,

				 s->bo, 0, bo_flags);

		if (context_eng3d(ctx)->oclass >= NV17_3D_CLASS) {

			setup_hierz_buffer(ctx);

			context_dirty(ctx, ZCLEAR);

		}

	}

	BEGIN_NV04(push, NV10_3D(RT_FORMAT), 2);

	PUSH_DATA (push, rt_format);

	PUSH_DATA (push, zeta_pitch << 16 | rt_pitch);

	context_dirty(ctx, VIEWPORT);

	context_dirty(ctx, SCISSOR);

	context_dirty(ctx, DEPTH);

}

void

nv10_emit_render_mode(struct gl_context *ctx, int emit)

{

}

void

nv10_emit_scissor(struct gl_context *ctx, int emit)

{

	struct nouveau_pushbuf *push = context_push(ctx);

	int x, y, w, h;

	get_scissors(ctx->DrawBuffer, &x, &y, &w, &h);

	BEGIN_NV04(push, NV10_3D(RT_HORIZ), 2);

	PUSH_DATA (push, w << 16 | x);

	PUSH_DATA (push, h << 16 | y);

}

void

nv10_emit_viewport(struct gl_context *ctx, int emit)

{

	struct nouveau_pushbuf *push = context_push(ctx);

	struct gl_viewport_attrib *vp = &ctx->ViewportArray[0];

	struct gl_framebuffer *fb = ctx->DrawBuffer;

	float a[4] = {};

	get_viewport_translate(ctx, a);

	a[0] -= 2048;

	a[1] -= 2048;

	if (nv10_use_viewport_zclear(ctx))

		a[2] = nv10_transform_depth(ctx, (vp->Far + vp->Near) / 2);

	BEGIN_NV04(push, NV10_3D(VIEWPORT_TRANSLATE_X), 4);

	PUSH_DATAp(push, a, 4);

	BEGIN_NV04(push, NV10_3D(VIEWPORT_CLIP_HORIZ(0)), 1);

	PUSH_DATA (push, (fb->Width - 1) << 16 | 0x08000800);

	BEGIN_NV04(push, NV10_3D(VIEWPORT_CLIP_VERT(0)), 1);

	PUSH_DATA (push, (fb->Height - 1) << 16 | 0x08000800);

	context_dirty(ctx, PROJECTION);

}

void

nv10_emit_zclear(struct gl_context *ctx, int emit)

{

	struct nouveau_context *nctx = to_nouveau_context(ctx);

	struct nouveau_pushbuf *push = context_push(ctx);

	struct nouveau_framebuffer *nfb =

		to_nouveau_framebuffer(ctx->DrawBuffer);

	if (nfb->hierz.bo) {

		BEGIN_NV04(push, NV17_3D(ZCLEAR_ENABLE), 2);

		PUSH_DATAb(push, !nctx->hierz.clear_blocked);

		PUSH_DATA (push, nfb->hierz.clear_value |

			 (nctx->hierz.clear_seq & 0xff));

	} else {

		BEGIN_NV04(push, NV10_3D(DEPTH_RANGE_NEAR), 2);

		PUSH_DATAf(push, nv10_transform_depth(ctx, 0));

		PUSH_DATAf(push, nv10_transform_depth(ctx, 1));

		context_dirty(ctx, VIEWPORT);

	}

}