/*
 * Copyright (C) 2009-2010 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 "nv04_3d.xml.h"
#include "nv04_driver.h"
#include "util/u_memory.h"

static GLboolean
texunit_needs_combiners(struct gl_texture_unit *u,
                        struct gl_fixedfunc_texture_unit *f)
{
	struct gl_texture_object *t = u->_Current;
	struct gl_texture_image *ti = t->Image[0][t->Attrib.BaseLevel];

	return ti->TexFormat == MESA_FORMAT_A_UNORM8 ||
		ti->TexFormat == MESA_FORMAT_L_UNORM8 ||
		f->EnvMode == GL_COMBINE ||
		f->EnvMode == GL_COMBINE4_NV ||
		f->EnvMode == GL_BLEND ||
		f->EnvMode == GL_ADD;
}

struct nouveau_object *
nv04_context_engine(struct gl_context *ctx)
{
	struct nv04_context *nctx = to_nv04_context(ctx);
	struct nouveau_hw_state *hw = &to_nouveau_context(ctx)->hw;
	struct nouveau_pushbuf *push = context_push(ctx);
	struct nouveau_object *fahrenheit;

	if ((ctx->Texture.Unit[0]._Current &&
	     texunit_needs_combiners(&ctx->Texture.Unit[0],
                                     &ctx->Texture.FixedFuncUnit[0])) ||
	    ctx->Texture.Unit[1]._Current ||
	    ctx->Stencil.Enabled ||
	    GET_COLORMASK(ctx->Color.ColorMask, 0) != 0xf)
		fahrenheit = hw->eng3dm;
	else
		fahrenheit = hw->eng3d;

	if (fahrenheit != nctx->eng3d) {
		BEGIN_NV04(push, NV01_SUBC(3D, OBJECT), 1);
		PUSH_DATA (push, fahrenheit->handle);
		nctx->eng3d = fahrenheit;
	}

	return fahrenheit;
}

static void
nv04_hwctx_init(struct gl_context *ctx)
{
	struct nouveau_hw_state *hw = &to_nouveau_context(ctx)->hw;
	struct nouveau_pushbuf *push = context_push(ctx);
	struct nv04_fifo *fifo = hw->chan->data;

	BEGIN_NV04(push, NV01_SUBC(SURF, OBJECT), 1);
	PUSH_DATA (push, hw->surf3d->handle);
	BEGIN_NV04(push, NV04_SF3D(DMA_NOTIFY), 3);
	PUSH_DATA (push, hw->ntfy->handle);
	PUSH_DATA (push, fifo->vram);
	PUSH_DATA (push, fifo->vram);

	BEGIN_NV04(push, NV01_SUBC(3D, OBJECT), 1);
	PUSH_DATA (push, hw->eng3d->handle);
	BEGIN_NV04(push, NV04_TTRI(DMA_NOTIFY), 4);
	PUSH_DATA (push, hw->ntfy->handle);
	PUSH_DATA (push, fifo->vram);
	PUSH_DATA (push, fifo->gart);
	PUSH_DATA (push, hw->surf3d->handle);

	BEGIN_NV04(push, NV01_SUBC(3D, OBJECT), 1);
	PUSH_DATA (push, hw->eng3dm->handle);
	BEGIN_NV04(push, NV04_MTRI(DMA_NOTIFY), 4);
	PUSH_DATA (push, hw->ntfy->handle);
	PUSH_DATA (push, fifo->vram);
	PUSH_DATA (push, fifo->gart);
	PUSH_DATA (push, hw->surf3d->handle);

	PUSH_KICK (push);
}

static void
init_dummy_texture(struct gl_context *ctx)
{
	struct nouveau_surface *s = &to_nv04_context(ctx)->dummy_texture;

	nouveau_surface_alloc(ctx, s, SWIZZLED,
			      NOUVEAU_BO_MAP | NOUVEAU_BO_VRAM,
			      MESA_FORMAT_B8G8R8A8_UNORM, 1, 1);

	nouveau_bo_map(s->bo, NOUVEAU_BO_WR, context_client(ctx));
	*(uint32_t *)s->bo->map = 0xffffffff;
}

static void
nv04_context_destroy(struct gl_context *ctx)
{
	struct nouveau_context *nctx = to_nouveau_context(ctx);

	nv04_surface_takedown(ctx);
	nv04_render_destroy(ctx);
	nouveau_surface_ref(NULL, &to_nv04_context(ctx)->dummy_texture);

	nouveau_object_del(&nctx->hw.eng3d);
	nouveau_object_del(&nctx->hw.eng3dm);
	nouveau_object_del(&nctx->hw.surf3d);

	nouveau_context_deinit(ctx);
	align_free(ctx);
}

static struct gl_context *
nv04_context_create(struct nouveau_screen *screen, gl_api api,
		    const struct gl_config *visual,
		    struct gl_context *share_ctx)
{
	struct nv04_context *nctx;
	struct nouveau_hw_state *hw;
	struct gl_context *ctx;
	int ret;

	nctx = align_calloc(sizeof(struct nv04_context), 16);
	if (!nctx)
		return NULL;

	ctx = &nctx->base.base;
	hw = &nctx->base.hw;

	if (!nouveau_context_init(ctx, api, screen, visual, share_ctx))
		goto fail;

	/* GL constants. */
	ctx->Const.MaxTextureSize = 1024;
	ctx->Const.MaxTextureCoordUnits = NV04_TEXTURE_UNITS;
	ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits = NV04_TEXTURE_UNITS;
	ctx->Const.MaxTextureUnits = NV04_TEXTURE_UNITS;
	ctx->Const.MaxTextureMaxAnisotropy = 2;
	ctx->Const.MaxTextureLodBias = 15;

	/* 2D engine. */
	ret = nv04_surface_init(ctx);
	if (!ret)
		goto fail;

	/* 3D engine. */
	ret = nouveau_object_new(context_chan(ctx), 0xbeef0001,
				 NV04_TEXTURED_TRIANGLE_CLASS, NULL, 0,
				 &hw->eng3d);
	if (ret)
		goto fail;

	ret = nouveau_object_new(context_chan(ctx), 0xbeef0002,
				 NV04_MULTITEX_TRIANGLE_CLASS, NULL, 0,
				 &hw->eng3dm);
	if (ret)
		goto fail;

	ret = nouveau_object_new(context_chan(ctx), 0xbeef0003,
				 NV04_SURFACE_3D_CLASS, NULL, 0,
				 &hw->surf3d);
	if (ret)
		goto fail;

	init_dummy_texture(ctx);
	nv04_hwctx_init(ctx);
	nv04_render_init(ctx);

	return ctx;

fail:
	nv04_context_destroy(ctx);
	return NULL;
}

const struct nouveau_driver nv04_driver = {
	.context_create = nv04_context_create,
	.context_destroy = nv04_context_destroy,
	.surface_copy = nv04_surface_copy,
	.surface_fill = nv04_surface_fill,
	.emit = (nouveau_state_func[]) {
		nv04_defer_control,
		nouveau_emit_nothing,
		nv04_defer_blend,
		nv04_defer_blend,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nv04_defer_control,
		nouveau_emit_nothing,
		nv04_defer_control,
		nouveau_emit_nothing,
		nv04_defer_control,
		nv04_defer_control,
		nouveau_emit_nothing,
		nv04_emit_framebuffer,
		nv04_defer_blend,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nv04_emit_scissor,
		nv04_defer_blend,
		nv04_defer_control,
		nv04_defer_control,
		nv04_defer_control,
		nv04_emit_tex_env,
		nv04_emit_tex_env,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nv04_emit_tex_obj,
		nv04_emit_tex_obj,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nouveau_emit_nothing,
		nv04_emit_blend,
		nv04_emit_control,
	},
	.num_emit = NUM_NV04_STATE,
};
