ffb_xmesa.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/* $XFree86: xc/lib/GL/mesa/src/drv/ffb/ffb_xmesa.c,v 1.4 2002/02/22 21:32:59 dawes Exp $
 *
 * GLX Hardware Device Driver for Sun Creator/Creator3D
 * Copyright (C) 2000, 2001 David S. Miller
 *
 * 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
 * DAVID MILLER, OR ANY OTHER CONTRIBUTORS 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.
 *
 *
 *    David S. Miller <[e-mail]>
 */

#include "ffb_xmesa.h"
#include "context.h"
#include "framebuffer.h"
#include "matrix.h"
#include "renderbuffer.h"
#include "simple_list.h"
#include "imports.h"
#include "utils.h"

#include "swrast/swrast.h"
#include "swrast_setup/swrast_setup.h"
#include "tnl/tnl.h"
#include "tnl/t_pipeline.h"
#include "vbo/vbo.h"
#include "drivers/common/driverfuncs.h"

#include "ffb_context.h"
#include "ffb_dd.h"
#include "ffb_span.h"
#include "ffb_depth.h"
#include "ffb_stencil.h"
#include "ffb_clear.h"
#include "ffb_vb.h"
#include "ffb_tris.h"
#include "ffb_lines.h"
#include "ffb_points.h"
#include "ffb_state.h"
#include "ffb_tex.h"
#include "ffb_lock.h"
#include "ffb_vtxfmt.h"
#include "ffb_bitmap.h"

#include "drm_sarea.h"

#include "drirenderbuffer.h"

static GLboolean
ffbInitDriver(__DRIscreenPrivate *sPriv)
{
	ffbScreenPrivate *ffbScreen;
	FFBDRIPtr gDRIPriv = (FFBDRIPtr) sPriv->pDevPriv;
	drmAddress map;

	if (getenv("LIBGL_FORCE_XSERVER"))
		return GL_FALSE;


   	if (sPriv->devPrivSize != sizeof(FFBDRIRec)) {
      		fprintf(stderr,"\nERROR!  sizeof(FFBDRIRec) does not match passed size from device driver\n");
      		return GL_FALSE;
   	}

	/* Allocate the private area. */
	ffbScreen = (ffbScreenPrivate *) MALLOC(sizeof(ffbScreenPrivate));
	if (!ffbScreen)
		return GL_FALSE;

	/* Map FBC registers. */
	if (drmMap(sPriv->fd,
		   gDRIPriv->hFbcRegs,
		   gDRIPriv->sFbcRegs,
		   &map)) {
	        FREE(ffbScreen);
		return GL_FALSE;
	}
	ffbScreen->regs = (ffb_fbcPtr) map;

	/* Map ramdac registers. */
	if (drmMap(sPriv->fd,
		   gDRIPriv->hDacRegs,
		   gDRIPriv->sDacRegs,
		   &map)) {
		drmUnmap((drmAddress)ffbScreen->regs, gDRIPriv->sFbcRegs);
		FREE(ffbScreen);
		return GL_FALSE;
	}
	ffbScreen->dac = (ffb_dacPtr) map;

	/* Map "Smart" framebuffer views. */
	if (drmMap(sPriv->fd,
		   gDRIPriv->hSfb8r,
		   gDRIPriv->sSfb8r,
		   &map)) {
		drmUnmap((drmAddress)ffbScreen->regs, gDRIPriv->sFbcRegs);
		drmUnmap((drmAddress)ffbScreen->dac, gDRIPriv->sDacRegs);
		FREE(ffbScreen);
		return GL_FALSE;
	}
	ffbScreen->sfb8r = (volatile char *) map;

	if (drmMap(sPriv->fd,
		   gDRIPriv->hSfb32,
		   gDRIPriv->sSfb32,
		   &map)) {
		drmUnmap((drmAddress)ffbScreen->regs, gDRIPriv->sFbcRegs);
		drmUnmap((drmAddress)ffbScreen->dac, gDRIPriv->sDacRegs);
		drmUnmap((drmAddress)ffbScreen->sfb8r, gDRIPriv->sSfb8r);
		FREE(ffbScreen);
		return GL_FALSE;
	}
	ffbScreen->sfb32 = (volatile char *) map;

	if (drmMap(sPriv->fd,
		   gDRIPriv->hSfb64,
		   gDRIPriv->sSfb64,
		   &map)) {
		drmUnmap((drmAddress)ffbScreen->regs, gDRIPriv->sFbcRegs);
		drmUnmap((drmAddress)ffbScreen->dac, gDRIPriv->sDacRegs);
		drmUnmap((drmAddress)ffbScreen->sfb8r, gDRIPriv->sSfb8r);
		drmUnmap((drmAddress)ffbScreen->sfb32, gDRIPriv->sSfb32);
		FREE(ffbScreen);
		return GL_FALSE;
	}
	ffbScreen->sfb64 = (volatile char *) map;

	ffbScreen->fifo_cache = 0;
	ffbScreen->rp_active = 0;

	ffbScreen->sPriv = sPriv;
	sPriv->private = (void *) ffbScreen;

	ffbDDLinefuncInit();
	ffbDDPointfuncInit();

	return GL_TRUE;
}


static void
ffbDestroyScreen(__DRIscreenPrivate *sPriv)
{
	ffbScreenPrivate *ffbScreen = sPriv->private;
	FFBDRIPtr gDRIPriv = (FFBDRIPtr) sPriv->pDevPriv;

	drmUnmap((drmAddress)ffbScreen->regs, gDRIPriv->sFbcRegs);
	drmUnmap((drmAddress)ffbScreen->dac, gDRIPriv->sDacRegs);
	drmUnmap((drmAddress)ffbScreen->sfb8r, gDRIPriv->sSfb8r);
	drmUnmap((drmAddress)ffbScreen->sfb32, gDRIPriv->sSfb32);
	drmUnmap((drmAddress)ffbScreen->sfb64, gDRIPriv->sSfb64);

	FREE(ffbScreen);
}

static const struct tnl_pipeline_stage *ffb_pipeline[] = {
   &_tnl_vertex_transform_stage, 
   &_tnl_normal_transform_stage, 
   &_tnl_lighting_stage,
				/* REMOVE: fog coord stage */
   &_tnl_texgen_stage, 
   &_tnl_texture_transform_stage, 
				/* REMOVE: point attenuation stage */
   &_tnl_render_stage,		
   0,
};

/* Create and initialize the Mesa and driver specific context data */
static GLboolean
ffbCreateContext(const __GLcontextModes *mesaVis,
                 __DRIcontextPrivate *driContextPriv,
                 void *sharedContextPrivate)
{
	ffbContextPtr fmesa;
	GLcontext *ctx, *shareCtx;
	__DRIscreenPrivate *sPriv;
	ffbScreenPrivate *ffbScreen;
	char *debug;
	struct dd_function_table functions;

        /* Allocate ffb context */
	fmesa = (ffbContextPtr) CALLOC(sizeof(ffbContextRec));
	if (!fmesa)
		return GL_FALSE;

	_mesa_init_driver_functions(&functions);

        /* Allocate Mesa context */
        if (sharedContextPrivate)
           shareCtx = ((ffbContextPtr) sharedContextPrivate)->glCtx;
        else 
           shareCtx = NULL;
        fmesa->glCtx = _mesa_create_context(mesaVis, shareCtx,
                                            &functions, fmesa);
        if (!fmesa->glCtx) {
           FREE(fmesa);
           return GL_FALSE;
        }
        driContextPriv->driverPrivate = fmesa;
        ctx = fmesa->glCtx;

	sPriv = driContextPriv->driScreenPriv;
	ffbScreen = (ffbScreenPrivate *) sPriv->private;

	/* Dri stuff. */
	fmesa->hHWContext = driContextPriv->hHWContext;
	fmesa->driFd = sPriv->fd;
	fmesa->driHwLock = &sPriv->pSAREA->lock;

	fmesa->ffbScreen = ffbScreen;
	fmesa->driScreen = sPriv;
	fmesa->ffb_sarea = FFB_DRISHARE(sPriv->pSAREA);

	/* Register and framebuffer hw pointers. */
	fmesa->regs = ffbScreen->regs;
	fmesa->sfb32 = ffbScreen->sfb32;

	ffbDDInitContextHwState(ctx);

	/* Default clear and depth colors. */
	{
		GLubyte r = (GLint) (ctx->Color.ClearColor[0] * 255.0F);
		GLubyte g = (GLint) (ctx->Color.ClearColor[1] * 255.0F);
		GLubyte b = (GLint) (ctx->Color.ClearColor[2] * 255.0F);

		fmesa->clear_pixel = ((r << 0) |
				      (g << 8) |
				      (b << 16));
	}
	fmesa->clear_depth = Z_FROM_MESA(ctx->Depth.Clear * 4294967295.0f);
	fmesa->clear_stencil = ctx->Stencil.Clear & 0xf;

	/* No wide points. */
	ctx->Const.MinPointSize = 1.0;
	ctx->Const.MinPointSizeAA = 1.0;
	ctx->Const.MaxPointSize = 1.0;
	ctx->Const.MaxPointSizeAA = 1.0;

	/* Disable wide lines as we can't antialias them correctly in
	 * hardware.
	 */
	ctx->Const.MinLineWidth = 1.0;
	ctx->Const.MinLineWidthAA = 1.0;
	ctx->Const.MaxLineWidth = 1.0;
	ctx->Const.MaxLineWidthAA = 1.0;
	ctx->Const.LineWidthGranularity = 1.0;

	/* Instead of having GCC emit these constants a zillion times
	 * everywhere in the driver, put them here.
	 */
	fmesa->ffb_2_30_fixed_scale           = __FFB_2_30_FIXED_SCALE;
	fmesa->ffb_one_over_2_30_fixed_scale  = (1.0 / __FFB_2_30_FIXED_SCALE);
	fmesa->ffb_16_16_fixed_scale          = __FFB_16_16_FIXED_SCALE;
	fmesa->ffb_one_over_16_16_fixed_scale = (1.0 / __FFB_16_16_FIXED_SCALE);
	fmesa->ffb_ubyte_color_scale          = 255.0f;
	fmesa->ffb_zero			      = 0.0f;

	fmesa->debugFallbacks = GL_FALSE;
	debug = getenv("LIBGL_DEBUG");
	if (debug && strstr(debug, "fallbacks"))
		fmesa->debugFallbacks = GL_TRUE;

	/* Initialize the software rasterizer and helper modules. */
	_swrast_CreateContext( ctx );
	_vbo_CreateContext( ctx );
	_tnl_CreateContext( ctx );
	_swsetup_CreateContext( ctx );

	/* All of this need only be done once for a new context. */
	/* XXX these should be moved right after the
	 *  _mesa_init_driver_functions() call above.
	 */
	ffbDDExtensionsInit(ctx);
	ffbDDInitDriverFuncs(ctx);
	ffbDDInitStateFuncs(ctx);
	ffbDDInitRenderFuncs(ctx);
	/*ffbDDInitTexFuncs(ctx); not needed */
	ffbDDInitBitmapFuncs(ctx);
	ffbInitVB(ctx);

#if 0
	ffbInitTnlModule(ctx);
#endif

	_tnl_destroy_pipeline(ctx);
	_tnl_install_pipeline(ctx, ffb_pipeline);

	return GL_TRUE;
}

static void
ffbDestroyContext(__DRIcontextPrivate *driContextPriv)
{
	ffbContextPtr fmesa = (ffbContextPtr) driContextPriv->driverPrivate;

	if (fmesa) {
		ffbFreeVB(fmesa->glCtx);

		_swsetup_DestroyContext( fmesa->glCtx );
		_tnl_DestroyContext( fmesa->glCtx );
		_vbo_DestroyContext( fmesa->glCtx );
		_swrast_DestroyContext( fmesa->glCtx );

                /* free the Mesa context */
                fmesa->glCtx->DriverCtx = NULL;
                _mesa_destroy_context(fmesa->glCtx);

		FREE(fmesa);
	}
}

/* Create and initialize the Mesa and driver specific pixmap buffer data */
static GLboolean
ffbCreateBuffer(__DRIscreenPrivate *driScrnPriv,
                __DRIdrawablePrivate *driDrawPriv,
                const __GLcontextModes *mesaVis,
                GLboolean isPixmap )
{
   /* Mesa checks for pitch > 0, but ffb doesn't use pitches */
   int bogusPitch = 1;
   int bpp = 4; /* we've always got a 32bpp framebuffer */
   int offset = 0; /* always at 0 for offset */

   if (isPixmap) {
      return GL_FALSE; /* not implemented */
   } else {
      GLboolean swStencil = (mesaVis->stencilBits > 0 && 
			     mesaVis->depthBits != 24);
      struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);

      {
         driRenderbuffer *frontRb
            = driNewRenderbuffer(GL_RGBA, NULL, bpp, offset, bogusPitch,
                                 driDrawPriv);
         ffbSetSpanFunctions(frontRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
      }

      if (mesaVis->doubleBufferMode) {
         driRenderbuffer *backRb
            = driNewRenderbuffer(GL_RGBA, NULL, bpp, offset, bogusPitch,
                                 driDrawPriv);
         ffbSetSpanFunctions(backRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
      }