path: root/src/mesa/drivers/dri/r300/r300_render.c

/**************************************************************************

Copyright (C) 2004 Nicolai Haehnle.

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**************************************************************************/

/**
 * \file
 *
 * \brief R300 Render (Vertex Buffer Implementation)
 *
 * The immediate implementation has been removed from CVS in favor of the vertex
 * buffer implementation.
 *
 * The render functions are called by the pipeline manager to render a batch of
 * primitives. They return TRUE to pass on to the next stage (i.e. software
 * rasterization) or FALSE to indicate that the pipeline has finished after
 * rendering something.
 *
 * When falling back to software TCL still attempt to use hardware
 * rasterization.
 *
 * I am not sure that the cache related registers are setup correctly, but
 * obviously this does work... Further investigation is needed.
 *
 * \author Nicolai Haehnle <prefect_@gmx.net>
 */

#include "glheader.h"
#include "state.h"
#include "imports.h"
#include "enums.h"
#include "macros.h"
#include "context.h"
#include "dd.h"
#include "simple_list.h"
#include "api_arrayelt.h"
#include "swrast/swrast.h"
#include "swrast_setup/swrast_setup.h"
#include "vbo/vbo.h"
#include "tnl/tnl.h"
#include "tnl/t_vp_build.h"
#include "radeon_reg.h"
#include "radeon_macros.h"
#include "radeon_ioctl.h"
#include "radeon_state.h"
#include "r300_context.h"
#include "r300_ioctl.h"
#include "r300_state.h"
#include "r300_reg.h"
#include "r300_tex.h"
#include "r300_maos.h"
#include "r300_emit.h"
extern int future_hw_tcl_on;

/**
 * \brief Convert a OpenGL primitive type into a R300 primitive type.
 */
static int r300PrimitiveType(r300ContextPtr rmesa, GLcontext * ctx, int prim)
{
	int type = -1;

	switch (prim & PRIM_MODE_MASK) {
	case GL_POINTS:
		type = R300_VAP_VF_CNTL__PRIM_POINTS;
		break;
	case GL_LINES:
		type = R300_VAP_VF_CNTL__PRIM_LINES;
		break;
	case GL_LINE_STRIP:
		type = R300_VAP_VF_CNTL__PRIM_LINE_STRIP;
		break;
	case GL_LINE_LOOP:
		type = R300_VAP_VF_CNTL__PRIM_LINE_LOOP;
		break;
	case GL_TRIANGLES:
		type = R300_VAP_VF_CNTL__PRIM_TRIANGLES;
		break;
	case GL_TRIANGLE_STRIP:
		type = R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP;
		break;
	case GL_TRIANGLE_FAN:
		type = R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN;
		break;
	case GL_QUADS:
		type = R300_VAP_VF_CNTL__PRIM_QUADS;
		break;
	case GL_QUAD_STRIP:
		type = R300_VAP_VF_CNTL__PRIM_QUAD_STRIP;
		break;
	case GL_POLYGON:
		type = R300_VAP_VF_CNTL__PRIM_POLYGON;
		break;
	default:
		fprintf(stderr,
			"%s:%s Do not know how to handle primitive 0x%04x - help me !\n",
			__FILE__, __FUNCTION__, prim & PRIM_MODE_MASK);
		return -1;
		break;
	}
	return type;
}

static int r300NumVerts(r300ContextPtr rmesa, int num_verts, int prim)
{
	int verts_off = 0;

	switch (prim & PRIM_MODE_MASK) {
	case GL_POINTS:
		verts_off = 0;
		break;
	case GL_LINES:
		verts_off = num_verts % 2;
		break;
	case GL_LINE_STRIP:
		if (num_verts < 2)
			verts_off = num_verts;
		break;
	case GL_LINE_LOOP:
		if (num_verts < 2)
			verts_off = num_verts;
		break;
	case GL_TRIANGLES:
		verts_off = num_verts % 3;
		break;
	case GL_TRIANGLE_STRIP:
		if (num_verts < 3)
			verts_off = num_verts;
		break;
	case GL_TRIANGLE_FAN:
		if (num_verts < 3)
			verts_off = num_verts;
		break;
	case GL_QUADS:
		verts_off = num_verts % 4;
		break;
	case GL_QUAD_STRIP:
		if (num_verts < 4)
			verts_off = num_verts;
		else
			verts_off = num_verts % 2;
		break;
	case GL_POLYGON:
		if (num_verts < 3)
			verts_off = num_verts;
		break;
	default:
		fprintf(stderr,
			"%s:%s Do not know how to handle primitive 0x%04x - help me !\n",
			__FILE__, __FUNCTION__, prim & PRIM_MODE_MASK);
		return -1;
		break;
	}

	if (RADEON_DEBUG & DEBUG_VERTS) {
		if (num_verts - verts_off == 0) {
			WARN_ONCE
			    ("user error: Need more than %d vertices to draw primitive 0x%04x !\n",
			     num_verts, prim & PRIM_MODE_MASK);
			return 0;
		}

		if (verts_off > 0) {
			WARN_ONCE
			    ("user error: %d is not a valid number of vertices for primitive 0x%04x !\n",
			     num_verts, prim & PRIM_MODE_MASK);
		}
	}

	return num_verts - verts_off;
}

static void inline r300FireEB(r300ContextPtr rmesa, unsigned long addr,
			      int vertex_count, int type, int elt_size)
{
	int cmd_reserved = 0;
	int cmd_written = 0;
	drm_radeon_cmd_header_t *cmd = NULL;
	unsigned long t_addr;
	unsigned long magic_1, magic_2;

	assert(elt_size == 2 || elt_size == 4);

	if (addr & (elt_size - 1)) {
		WARN_ONCE("Badly aligned buffer\n");
		return;
	}

	magic_1 = (addr % 32) / 4;
	t_addr = addr & ~0x1d;
	magic_2 = (vertex_count + 1 + (t_addr & 0x2)) / 2 + magic_1;

	start_packet3(RADEON_CP_PACKET3_3D_DRAW_INDX_2, 0);
	if (elt_size == 4) {
		e32(R300_VAP_VF_CNTL__PRIM_WALK_INDICES |
		    (vertex_count << 16) | type |
		    R300_VAP_VF_CNTL__INDEX_SIZE_32bit);
	} else {
		e32(R300_VAP_VF_CNTL__PRIM_WALK_INDICES |
		    (vertex_count << 16) | type);
	}

	start_packet3(RADEON_CP_PACKET3_INDX_BUFFER, 2);
#ifdef OPTIMIZE_ELTS
	if (elt_size == 4) {
		e32(R300_EB_UNK1 | (0 << 16) | R300_EB_UNK2);
		e32(addr);
	} else {
		e32(R300_EB_UNK1 | (magic_1 << 16) | R300_EB_UNK2);
		e32(t_addr);
	}
#else
	e32(R300_EB_UNK1 | (0 << 16) | R300_EB_UNK2);
	e32(addr);
#endif

	if (elt_size == 4) {
		e32(vertex_count);
	} else {
#ifdef OPTIMIZE_ELTS
		e32(magic_2);
#else
		e32((vertex_count + 1) / 2);
#endif
	}
}

static void r300RunRenderPrimitive(r300ContextPtr rmesa, GLcontext * ctx,
				   int start, int end, int prim)
{
	int type, num_verts;

	type = r300PrimitiveType(rmesa, ctx, prim);
	num_verts = r300NumVerts(rmesa, end - start, prim);

	if (type < 0 || num_verts <= 0)
		return;

	if (rmesa->state.VB.Elts) {
		r300EmitAOS(rmesa, rmesa->state.aos_count, start);
		if (num_verts > 65535) {
			/* not implemented yet */
			WARN_ONCE("Too many elts\n");
			return;
		}
		r300EmitElts(ctx, rmesa->state.VB.Elts, num_verts,
			     rmesa->state.VB.elt_size);
		r300FireEB(rmesa, rmesa->state.elt_dma.aos_offset,
			   num_verts, type, rmesa->state.VB.elt_size);
	} else {
		r300EmitAOS(rmesa, rmesa->state.aos_count, start);
		fire_AOS(rmesa, num_verts, type);
	}
}

#define CONV_VB(a, b) rvb->AttribPtr[(a)].size = vb->b->size, \
			rvb->AttribPtr[(a)].type = GL_FLOAT, \
			rvb->AttribPtr[(a)].stride = vb->b->stride, \
			rvb->AttribPtr[(a)].data = vb->b->data

static void radeon_vb_to_rvb(r300ContextPtr rmesa,
			     struct radeon_vertex_buffer *rvb,
			     struct vertex_buffer *vb)
{
	int i;
	GLcontext *ctx;
	ctx = rmesa->radeon.glCtx;

	memset(rvb, 0, sizeof(*rvb));

	rvb->Elts = vb->Elts;
	rvb->elt_size = 4;
	rvb->elt_min = 0;
	rvb->elt_max = vb->Count;

	rvb->Count = vb->Count;

	if (hw_tcl_on) {
		CONV_VB(VERT_ATTRIB_POS, ObjPtr);
	} else {
		assert(vb->ClipPtr);
		CONV_VB(VERT_ATTRIB_POS, ClipPtr);
	}

	CONV_VB(VERT_ATTRIB_NORMAL, NormalPtr);
	CONV_VB(VERT_ATTRIB_COLOR0, ColorPtr[0]);
	CONV_VB(VERT_ATTRIB_COLOR1, SecondaryColorPtr[0]);
	CONV_VB(VERT_ATTRIB_FOG, FogCoordPtr);

	for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++)
		CONV_VB(VERT_ATTRIB_TEX0 + i, TexCoordPtr[i]);

	for (i = 0; i < MAX_VERTEX_PROGRAM_ATTRIBS; i++)
		CONV_VB(VERT_ATTRIB_GENERIC0 + i,
			AttribPtr[VERT_ATTRIB_GENERIC0 + i]);

	rvb->Primitive = vb->Primitive;
	rvb->PrimitiveCount = vb->PrimitiveCount;
	rvb->LockFirst = rvb->LockCount = 0;
	rvb->lock_uptodate = GL_FALSE;
}

static GLboolean r300RunRender(GLcontext * ctx,
			       struct tnl_pipeline_stage *stage)
{
	r300ContextPtr rmesa = R300_CONTEXT(ctx);
	struct radeon_vertex_buffer *VB = &rmesa->state.VB;
	int i;
	int cmd_reserved = 0;
	int cmd_written = 0;
	drm_radeon_cmd_header_t *cmd = NULL;

	if (RADEON_DEBUG & DEBUG_PRIMS)
		fprintf(stderr, "%s\n", __FUNCTION__);

	if (stage) {
		TNLcontext *tnl = TNL_CONTEXT(ctx);
		radeon_vb_to_rvb(rmesa, VB, &tnl->vb);
	}

	r300UpdateShaders(rmesa);
	if (r300EmitArrays(ctx))
		return GL_TRUE;

	r300UpdateShaderStates(rmesa);

	reg_start(R300_RB3D_DSTCACHE_CTLSTAT, 0);
	e32(R300_RB3D_DSTCACHE_UNKNOWN_0A);

	reg_start(R300_RB3D_ZCACHE_CTLSTAT, 0);
	e32(R300_RB3D_ZCACHE_UNKNOWN_03);

	r300EmitState(rmesa);

	for (i = 0; i < VB->PrimitiveCount; i++) {
		GLuint prim = _tnl_translate_prim(&VB->Primitive[i]);
		GLuint start = VB->Primitive[i].start;
		GLuint length = VB->Primitive[i].count;
		GLuint end = VB->Primitive[i].start + VB->Primitive[i].count;
		r300RunRenderPrimitive(rmesa, ctx, start, end, prim);
	}

	reg_start(R300_RB3D_DSTCACHE_CTLSTAT, 0);
	e32(R300_RB3D_DSTCACHE_UNKNOWN_0A);

	reg_start(R300_RB3D_ZCACHE_CTLSTAT, 0);
	e32(R300_RB3D_ZCACHE_UNKNOWN_03);

#ifdef USER_BUFFERS
	r300UseArrays(ctx);
#endif

	r300ReleaseArrays(ctx);

	return GL_FALSE;
}

#define FALLBACK_IF(expr)						\
	do {								\
		if (expr) {						\
			if (1 || RADEON_DEBUG & DEBUG_FALLBACKS)	\
				WARN_ONCE("Software fallback:%s\n",	\
					  #expr);			\
			return R300_FALLBACK_RAST;			\
		}							\
	} while(0)

static int r300Fallback(GLcontext * ctx)
{
	r300ContextPtr r300 = R300_CONTEXT(ctx);
	struct r300_fragment_program *fp = (struct r300_fragment_program *)
	    (char *)ctx->FragmentProgram._Current;

	if (fp) {
		if (!fp->translated)
			r300TranslateFragmentShader(r300, fp);
		FALLBACK_IF(!fp->translated);
	}

	FALLBACK_IF(ctx->RenderMode != GL_RENDER);

	FALLBACK_IF(ctx->Stencil._TestTwoSide
		    && (ctx->Stencil.Ref[0] != ctx->Stencil.Ref[1]
			|| ctx->Stencil.ValueMask[0] !=
			ctx->Stencil.ValueMask[1]
			|| ctx->Stencil.WriteMask[0] !=
			ctx->Stencil.WriteMask[1]));

	FALLBACK_IF(ctx->Color.ColorLogicOpEnabled);

	if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite)
		FALLBACK_IF(ctx->Point.PointSprite);

	if (!r300->disable_lowimpact_fallback) {
		FALLBACK_IF(ctx->Polygon.OffsetPoint);
		FALLBACK_IF(ctx->Polygon.OffsetLine);
		FALLBACK_IF(ctx->Polygon.StippleFlag);
		FALLBACK_IF(ctx->Multisample.Enabled);
		FALLBACK_IF(ctx->Line.StippleFlag);
		FALLBACK_IF(ctx->Line.SmoothFlag);
		FALLBACK_IF(ctx->Point.SmoothFlag);
	}

	return R300_FALLBACK_NONE;
}

static GLboolean r300RunNonTNLRender(GLcontext * ctx,
				     struct tnl_pipeline_stage *stage)
{
	if (RADEON_DEBUG & DEBUG_PRIMS)
		fprintf(stderr, "%s\n", __FUNCTION__);

	if (r300Fallback(ctx) >= R300_FALLBACK_RAST)
		return GL_TRUE;

	return r300RunRender(ctx, stage);
}

static GLboolean r300RunTCLRender(GLcontext * ctx,
				  struct tnl_pipeline_stage *stage)
{
	r300ContextPtr rmesa = R300_CONTEXT(ctx);
	struct r300_vertex_program *vp;

	hw_tcl_on = future_hw_tcl_on;

	if (RADEON_DEBUG & DEBUG_PRIMS)
		fprintf(stderr, "%s\n", __FUNCTION__);

	if (hw_tcl_on == GL_FALSE)
		return GL_TRUE;

	if (r300Fallback(ctx) >= R300_FALLBACK_TCL) {
		hw_tcl_on = GL_FALSE;
		return GL_TRUE;
	}

	r300UpdateShaders(rmesa);

	vp = (struct r300_vertex_program *)CURRENT_VERTEX_SHADER(ctx);
	if (vp->native == GL_FALSE) {
		hw_tcl_on = GL_FALSE;
		return GL_TRUE;
	}

	return r300RunRender(ctx, stage);
}

const struct tnl_pipeline_stage _r300_render_stage = {
	"r300 Hardware Rasterization",
	NULL,
	NULL,
	NULL,
	NULL,
	r300RunNonTNLRender
};

const struct tnl_pipeline_stage _r300_tcl_stage = {
	"r300 Hardware Transform, Clipping and Lighting",
	NULL,
	NULL,
	NULL,
	NULL,
	r300RunTCLRender
};