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path: root/src/mesa/drivers/dri/glamo/glamo_render.c
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/*
 * Direct Rendering Support for SMedia Glamo 336x/337x
 *
 * (c) 2009 Thomas White <taw@bitwiz.org.uk>
 *
 * 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 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 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.
 *
 *
 * Based on intel_render.c, to which the following notice applies:
 *
 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
 * 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, 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 TUNGSTEN GRAPHICS 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.
 *
 */


/*
 * Render unclipped vertex buffers by emitting vertices directly to
 * dma buffers.  Use strip/fan hardware acceleration where possible.
 *
 */
#include "main/glheader.h"
#include "main/context.h"
#include "main/macros.h"
#include "main/imports.h"
#include "main/mtypes.h"
#include "main/enums.h"

#include "tnl/t_context.h"
#include "tnl/t_vertex.h"
#include "tnl/t_pipeline.h"

#include "glamo_context.h"
#include "glamo_tris.h"
#include "glamo_regs.h"

/*
 * Render unclipped vertex buffers by emitting vertices directly to
 * VRAM buffers.  Use strip/fan hardware primitives where possible.
 * Try to simulate missing primitives with indexed vertices.
 */
#define HAVE_POINTS      1
#define HAVE_LINES       1
#define HAVE_LINE_STRIPS 0
#define HAVE_TRIANGLES   1
#define HAVE_TRI_STRIPS  0
#define HAVE_TRI_STRIP_1 0
#define HAVE_TRI_FANS    0
#define HAVE_POLYGONS    0
#define HAVE_QUADS       0
#define HAVE_QUAD_STRIPS 0
#define HAVE_ELTS        0


static void glamoFlushPrim(struct glamo_context *gCtx)
{
	printf("glamoFlushPrim: %i vertices, %i %i\n", gCtx->prim.count,
	gCtx->prim.start_offset, gCtx->prim.current_offset);

	if ( gCtx->prim.vb_bo == NULL ) return;

	/* Upload to hardware */
	glamo_bo_subdata(gCtx->prim.vb_bo, 0, gCtx->prim.current_offset,
	                 gCtx->prim.vb);

	/* Dispatch to the hardware */
	glamoDRMStartBurst(gCtx, G3D_STREAM_MODE_0);
	glamoDRMAddData(gCtx, 0x000f0300, 4);
	glamoDRMAddBO(gCtx, gCtx->prim.vb_bo);
	glamoDRMDispatch(gCtx);

	/* Please use a new BO for the next buffer */
	gCtx->prim.vb_bo = NULL;

	/* Continue from new start */
	gCtx->prim.start_offset = gCtx->prim.current_offset;
}


static inline GLuint glamoGetVBMax(struct glamo_context *gCtx)
{
	return GLAMO_VB_SIZE / gCtx->vertex_size;
}


static inline GLuint glamoGetCurrentMax(struct glamo_context *gCtx)
{
	/* How many more vertices can be accommodated?
	 * Each vertex takes up 4x 32-bit fixed point values */
	return (GLAMO_VB_SIZE - gCtx->prim.current_offset) / gCtx->vertex_size;
}


#define LOCAL_VARS \
	struct glamo_context *gCtx = GLAMO_CONTEXT(ctx);

#define INIT(prim)

#define FLUSH() glamoFlushPrim(gCtx)

#define GET_SUBSEQUENT_VB_MAX_VERTS() glamoGetVBMax(gCtx)
#define GET_CURRENT_VB_MAX_VERTS() glamoGetCurrentMax(gCtx)

#define ALLOC_VERTS(nr) glamoGetPrimSpace(gCtx, nr)

#define EMIT_VERTS(ctx, j, nr, buf) \
	_tnl_emit_vertices_to_buffer(ctx, j, (j)+(nr), buf)

#define TAG(x) glamo_##x
#include "tnl_dd/t_dd_dmatmp.h"


/**********************************************************************/
/*                          Render pipeline stage                     */
/**********************************************************************/


static GLboolean glamoRunRender(GLcontext *ctx,
                                struct tnl_pipeline_stage *stage)
{
	TNLcontext *tnl = TNL_CONTEXT(ctx);
	struct vertex_buffer *VB = &tnl->vb;
	GLuint i;

	printf("glamoRunRender\n");

	/* Don't handle clipping */
	if ( !glamo_validate_render(ctx, VB) ) {
		return GL_TRUE; /* Failed */
	}

	tnl->clipspace.new_inputs |= VERT_BIT_POS;

	tnl->Driver.Render.Start(ctx);

	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;

		if (!length) continue;

		glamo_render_tab_verts[prim & PRIM_MODE_MASK](ctx, start,
                                                     start + length, prim);

	}

	tnl->Driver.Render.Finish(ctx);

	glamoFireEngine(gCtx);

	return GL_FALSE;  /* Ok */
}


static const struct tnl_pipeline_stage _glamo_render_stage = {
	"glamo render",
	NULL,
	NULL,
	NULL,
	NULL,
	glamoRunRender
};


const struct tnl_pipeline_stage *glamo_pipeline[] = {
	&_tnl_vertex_transform_stage,
	&_tnl_vertex_cull_stage,
	&_tnl_normal_transform_stage,
	&_tnl_lighting_stage,
	&_tnl_fog_coordinate_stage,
	&_tnl_texgen_stage,
	&_tnl_texture_transform_stage,
	&_tnl_point_attenuation_stage,
	&_tnl_vertex_program_stage,
	&_glamo_render_stage,        /* ADD: unclipped rastersetup-to-dma */
	&_tnl_render_stage,
	0,
};