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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 "pipe/p_state.h"

#include "util/u_string.h"

#include "util/u_memory.h"

#include "util/u_prim.h"

#include "util/u_format.h"

#include "freedreno_draw.h"

#include "freedreno_context.h"

#include "freedreno_state.h"

#include "freedreno_resource.h"

#include "freedreno_util.h"

static enum pc_di_primtype

mode2primtype(unsigned mode)

{

	switch (mode) {

	case PIPE_PRIM_POINTS:         return DI_PT_POINTLIST;

	case PIPE_PRIM_LINES:          return DI_PT_LINELIST;

	case PIPE_PRIM_LINE_STRIP:     return DI_PT_LINESTRIP;

	case PIPE_PRIM_TRIANGLES:      return DI_PT_TRILIST;

	case PIPE_PRIM_TRIANGLE_STRIP: return DI_PT_TRISTRIP;

	case PIPE_PRIM_TRIANGLE_FAN:   return DI_PT_TRIFAN;

	case PIPE_PRIM_QUADS:          return DI_PT_QUADLIST;

	case PIPE_PRIM_QUAD_STRIP:     return DI_PT_QUADSTRIP;

	case PIPE_PRIM_POLYGON:        return DI_PT_POLYGON;

	}

	DBG("unsupported mode: (%s) %d", u_prim_name(mode), mode);

	assert(0);

	return DI_PT_NONE;

}

static enum pc_di_index_size

size2indextype(unsigned index_size)

{

	switch (index_size) {

	case 1: return INDEX_SIZE_8_BIT;

	case 2: return INDEX_SIZE_16_BIT;

	case 4: return INDEX_SIZE_32_BIT;

	}

	DBG("unsupported index size: %d", index_size);

	assert(0);

	return INDEX_SIZE_IGN;

}

/* this is same for a2xx/a3xx, so split into helper: */

void

fd_draw_emit(struct fd_context *ctx, const struct pipe_draw_info *info)

{

	struct fd_ringbuffer *ring = ctx->ring;

	struct pipe_index_buffer *idx = &ctx->indexbuf;

	struct fd_bo *idx_bo = NULL;

	enum pc_di_index_size idx_type = INDEX_SIZE_IGN;

	enum pc_di_src_sel src_sel;

	uint32_t idx_size, idx_offset;

	if (info->indexed) {

		assert(!idx->user_buffer);

		idx_bo = fd_resource(idx->buffer)->bo;

		idx_type = size2indextype(idx->index_size);

		idx_size = idx->index_size * info->count;

		idx_offset = idx->offset;

		src_sel = DI_SRC_SEL_DMA;

	} else {

		idx_bo = NULL;

		idx_type = INDEX_SIZE_IGN;

		idx_size = 0;

		idx_offset = 0;

		src_sel = DI_SRC_SEL_AUTO_INDEX;

	}

	OUT_PKT3(ring, CP_DRAW_INDX, info->indexed ? 5 : 3);

	OUT_RING(ring, 0x00000000);        /* viz query info. */

	OUT_RING(ring, DRAW(mode2primtype(info->mode),

			src_sel, idx_type, IGNORE_VISIBILITY));

	OUT_RING(ring, info->count);       /* NumIndices */

	if (info->indexed) {

		OUT_RELOC(ring, idx_bo, idx_offset, 0, 0);

		OUT_RING (ring, idx_size);

	}

}

static void

fd_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)

{

	struct fd_context *ctx = fd_context(pctx);

	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;

	struct pipe_scissor_state *scissor = fd_context_get_scissor(ctx);

	unsigned i, buffers = 0;

	/* if we supported transform feedback, we'd have to disable this: */

	if (((scissor->maxx - scissor->minx) *

			(scissor->maxy - scissor->miny)) == 0) {

		return;

	}

	ctx->needs_flush = true;

	/*

	 * Figure out the buffers/features we need:

	 */

	if (fd_depth_enabled(ctx)) {

		buffers |= FD_BUFFER_DEPTH;

		fd_resource(pfb->zsbuf->texture)->dirty = true;

		ctx->gmem_reason |= FD_GMEM_DEPTH_ENABLED;

	}

	if (fd_stencil_enabled(ctx)) {

		buffers |= FD_BUFFER_STENCIL;

		fd_resource(pfb->zsbuf->texture)->dirty = true;

		ctx->gmem_reason |= FD_GMEM_STENCIL_ENABLED;

	}

	if (fd_logicop_enabled(ctx))

		ctx->gmem_reason |= FD_GMEM_LOGICOP_ENABLED;

	for (i = 0; i < pfb->nr_cbufs; i++) {

		struct pipe_resource *surf = pfb->cbufs[i]->texture;

		fd_resource(surf)->dirty = true;

		buffers |= FD_BUFFER_COLOR;

		if (surf->nr_samples > 1)

			ctx->gmem_reason |= FD_GMEM_MSAA_ENABLED;

		if (fd_blend_enabled(ctx, i))

			ctx->gmem_reason |= FD_GMEM_BLEND_ENABLED;

	}

	ctx->num_draws++;

	/* any buffers that haven't been cleared, we need to restore: */

	ctx->restore |= buffers & (FD_BUFFER_ALL & ~ctx->cleared);

	/* and any buffers used, need to be resolved: */

	ctx->resolve |= buffers;

	ctx->draw(ctx, info);

}

/* TODO figure out how to make better use of existing state mechanism

 * for clear (and possibly gmem->mem / mem->gmem) so we can (a) keep

 * track of what state really actually changes, and (b) reduce the code

 * in the a2xx/a3xx parts.

 */

static void

fd_clear(struct pipe_context *pctx, unsigned buffers,

		const union pipe_color_union *color, double depth, unsigned stencil)

{

	struct fd_context *ctx = fd_context(pctx);

	struct pipe_framebuffer_state *pfb = &ctx->framebuffer;

	ctx->cleared |= buffers;

	ctx->resolve |= buffers;

	ctx->needs_flush = true;

	if (buffers & PIPE_CLEAR_COLOR)

		fd_resource(pfb->cbufs[0]->texture)->dirty = true;

	if (buffers & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL)) {

		fd_resource(pfb->zsbuf->texture)->dirty = true;

		ctx->gmem_reason |= FD_GMEM_CLEARS_DEPTH_STENCIL;

	}

	DBG("%x depth=%f, stencil=%u (%s/%s)", buffers, depth, stencil,

		util_format_short_name(pipe_surface_format(pfb->cbufs[0])),

		util_format_short_name(pipe_surface_format(pfb->zsbuf)));

	ctx->clear(ctx, buffers, color, depth, stencil);

	ctx->dirty |= FD_DIRTY_ZSA |

			FD_DIRTY_RASTERIZER |

			FD_DIRTY_SAMPLE_MASK |

			FD_DIRTY_PROG |

			FD_DIRTY_CONSTBUF |

			FD_DIRTY_BLEND;

	if (fd_mesa_debug & FD_DBG_DCLEAR)

		ctx->dirty = 0xffffffff;

}

static void

fd_clear_render_target(struct pipe_context *pctx, struct pipe_surface *ps,

		const union pipe_color_union *color,

		unsigned x, unsigned y, unsigned w, unsigned h)

{

	DBG("TODO: x=%u, y=%u, w=%u, h=%u", x, y, w, h);

}

static void

fd_clear_depth_stencil(struct pipe_context *pctx, struct pipe_surface *ps,

		unsigned buffers, double depth, unsigned stencil,

		unsigned x, unsigned y, unsigned w, unsigned h)

{

	DBG("TODO: buffers=%u, depth=%f, stencil=%u, x=%u, y=%u, w=%u, h=%u",

			buffers, depth, stencil, x, y, w, h);

}

void

fd_draw_init(struct pipe_context *pctx)

{

	pctx->draw_vbo = fd_draw_vbo;

	pctx->clear = fd_clear;

	pctx->clear_render_target = fd_clear_render_target;

	pctx->clear_depth_stencil = fd_clear_depth_stencil;

}