mach64_state.c

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

   case GL_CULL_FACE:
      FLUSH_BATCH( mmesa );
      mmesa->new_state |= MACH64_NEW_CULL;
      break;

   case GL_DEPTH_TEST:
      FLUSH_BATCH( mmesa );
      mmesa->new_state |= MACH64_NEW_DEPTH;
      break;

   case GL_DITHER:
      do {
	 GLuint s = mmesa->setup.scale_3d_cntl;
	 FLUSH_BATCH( mmesa );

	 if ( ctx->Color.DitherFlag ) {
	    /* Dithering causes problems w/ 24bpp depth */
	    if ( mmesa->mach64Screen->cpp == 4 )
	       s |=  MACH64_ROUND_EN;
	    else
	       s |=  MACH64_DITHER_EN;
	 } else {
	    s &= ~MACH64_DITHER_EN;
	    s &= ~MACH64_ROUND_EN;
	 }

	 if ( mmesa->setup.scale_3d_cntl != s ) {
	    mmesa->setup.scale_3d_cntl = s;
	    mmesa->dirty |= ( MACH64_UPLOAD_SCALE_3D_CNTL );
	 }
      } while (0);
      break;

   case GL_FOG:
      FLUSH_BATCH( mmesa );
      mmesa->new_state |= MACH64_NEW_FOG;
      break;

   case GL_INDEX_LOGIC_OP:
   case GL_COLOR_LOGIC_OP:
      FLUSH_BATCH( mmesa );
      FALLBACK( mmesa, MACH64_FALLBACK_LOGICOP,
		state && ctx->Color.LogicOp != GL_COPY );
      break;

   case GL_LIGHTING:
      mach64UpdateSpecularLighting(ctx);
      break;

   case GL_SCISSOR_TEST:
      FLUSH_BATCH( mmesa );
      mmesa->scissor = state;
      mmesa->new_state |= MACH64_NEW_CLIP;
      break;

   case GL_STENCIL_TEST:
      FLUSH_BATCH( mmesa );
      FALLBACK( mmesa, MACH64_FALLBACK_STENCIL, state );
      break;

   case GL_TEXTURE_1D:
   case GL_TEXTURE_2D:
   case GL_TEXTURE_3D:
      FLUSH_BATCH( mmesa );
      mmesa->new_state |= MACH64_NEW_TEXTURE;
      break;

   default:
      return;
   }
}

/* =============================================================
 * Render mode
 */

static void mach64DDRenderMode( GLcontext *ctx, GLenum mode )
{
   mach64ContextPtr mmesa = MACH64_CONTEXT(ctx);
   FALLBACK( mmesa, MACH64_FALLBACK_RENDER_MODE, (mode != GL_RENDER) );
}

/* =============================================================
 * State initialization, management
 */

static void mach64DDPrintDirty( const char *msg, GLuint state )
{
   fprintf( stderr,
	    "%s: (0x%x) %s%s%s%s%s%s%s%s%s%s%s%s\n",
	    msg,
	    state,
	    (state & MACH64_UPLOAD_DST_OFF_PITCH) ? "dst_off_pitch, " : "",
	    (state & MACH64_UPLOAD_Z_ALPHA_CNTL)  ? "z_alpha_cntl, " : "",
	    (state & MACH64_UPLOAD_SCALE_3D_CNTL) ? "scale_3d_cntl, " : "",
	    (state & MACH64_UPLOAD_DP_FOG_CLR)    ? "dp_fog_clr, " : "",
	    (state & MACH64_UPLOAD_DP_WRITE_MASK) ? "dp_write_mask, " : "",
	    (state & MACH64_UPLOAD_DP_PIX_WIDTH)  ? "dp_pix_width, " : "",
	    (state & MACH64_UPLOAD_SETUP_CNTL)    ? "setup_cntl, " : "",
	    (state & MACH64_UPLOAD_MISC)          ? "misc, " : "",
	    (state & MACH64_UPLOAD_TEXTURE)       ? "texture, " : "",
	    (state & MACH64_UPLOAD_TEX0IMAGE)     ? "tex0 image, " : "",
	    (state & MACH64_UPLOAD_TEX1IMAGE)     ? "tex1 image, " : "",
	    (state & MACH64_UPLOAD_CLIPRECTS)     ? "cliprects, " : "" );
}

/*
 * Load the current context's state into the hardware.
 *
 * NOTE: Be VERY careful about ensuring the context state is marked for
 * upload, the only place it shouldn't be uploaded is when the setup
 * state has changed in ReducedPrimitiveChange as this comes right after
 * a state update.
 *
 * Blits of any type should always upload the context and masks after
 * they are done.
 */
void mach64EmitHwStateLocked( mach64ContextPtr mmesa )
{
   drm_mach64_sarea_t *sarea = mmesa->sarea;
   drm_mach64_context_regs_t *regs = &(mmesa->setup);
   mach64TexObjPtr t0 = mmesa->CurrentTexObj[0];
   mach64TexObjPtr t1 = mmesa->CurrentTexObj[1];

   if ( MACH64_DEBUG & DEBUG_VERBOSE_MSG ) {
      mach64DDPrintDirty( __FUNCTION__, mmesa->dirty );
   }

   if ( t0 && t1 && mmesa->mach64Screen->numTexHeaps > 1 ) {
      if (t0->heap != t1->heap || 
	     (mmesa->dirty & MACH64_UPLOAD_TEX0IMAGE) ||
	     (mmesa->dirty & MACH64_UPLOAD_TEX1IMAGE))
	 mach64UploadMultiTexImages( mmesa, t0, t1 );
   } else {
      if ( mmesa->dirty & MACH64_UPLOAD_TEX0IMAGE ) {
	 if ( t0 ) mach64UploadTexImages( mmesa, t0 );
      }
      if ( mmesa->dirty & MACH64_UPLOAD_TEX1IMAGE ) {
	 if ( t1 ) mach64UploadTexImages( mmesa, t1 );
      }
   }

   if ( mmesa->dirty & (MACH64_UPLOAD_CONTEXT | MACH64_UPLOAD_MISC) ) {
      memcpy( &sarea->context_state, regs,
	      MACH64_NR_CONTEXT_REGS * sizeof(GLuint) );
   }

   if ( mmesa->dirty & MACH64_UPLOAD_TEXTURE ) {
      mach64EmitTexStateLocked( mmesa, t0, t1 );
   }

   sarea->vertsize = mmesa->vertex_size;

   /* Turn off the texture cache flushing.
    */
   mmesa->setup.tex_cntl &= ~MACH64_TEX_CACHE_FLUSH;

   sarea->dirty |= mmesa->dirty;

   mmesa->dirty &= MACH64_UPLOAD_CLIPRECTS;
}

static void mach64DDPrintState( const char *msg, GLuint flags )
{
   fprintf( stderr,
	    "%s: (0x%x) %s%s%s%s%s%s%s%s%s\n",
	    msg,
	    flags,
	    (flags & MACH64_NEW_CONTEXT)	? "context, " : "",
	    (flags & MACH64_NEW_ALPHA)		? "alpha, " : "",
	    (flags & MACH64_NEW_DEPTH)		? "depth, " : "",
	    (flags & MACH64_NEW_FOG)		? "fog, " : "",
	    (flags & MACH64_NEW_CLIP)		? "clip, " : "",
	    (flags & MACH64_NEW_TEXTURE)	? "texture, " : "",
	    (flags & MACH64_NEW_CULL)		? "cull, " : "",
	    (flags & MACH64_NEW_MASKS)		? "masks, " : "",
	    (flags & MACH64_NEW_WINDOW)		? "window, " : "" );
}

/* Update the hardware state */
void mach64DDUpdateHWState( GLcontext *ctx )
{
   mach64ContextPtr mmesa = MACH64_CONTEXT(ctx);
   int new_state = mmesa->new_state;

   if ( MACH64_DEBUG & DEBUG_VERBOSE_MSG ) {
      fprintf( stderr, "%s:\n", __FUNCTION__ );
   }

   if ( new_state )
   {
      FLUSH_BATCH( mmesa );

      mmesa->new_state = 0;

      if ( MACH64_DEBUG & DEBUG_VERBOSE_MSG )
	 mach64DDPrintState( __FUNCTION__, new_state );

      /* Update the various parts of the context's state.
       */
      if ( new_state & MACH64_NEW_ALPHA )
	 mach64UpdateAlphaMode( ctx );

      if ( new_state & MACH64_NEW_DEPTH )
	 mach64UpdateZMode( ctx );

      if ( new_state & MACH64_NEW_FOG )
	 mach64UpdateFogAttrib( ctx );

      if ( new_state & MACH64_NEW_CLIP )
	 mach64UpdateClipping( ctx );

      if ( new_state & MACH64_NEW_WINDOW )
	 mach64CalcViewport( ctx );

      if ( new_state & MACH64_NEW_CULL )
	 mach64UpdateCull( ctx );

      if ( new_state & MACH64_NEW_MASKS )
	 mach64UpdateMasks( ctx );

      if ( new_state & MACH64_NEW_TEXTURE )
	 mach64UpdateTextureState( ctx );
   }
}


static void mach64DDInvalidateState( GLcontext *ctx, GLuint new_state )
{
   _swrast_InvalidateState( ctx, new_state );
   _swsetup_InvalidateState( ctx, new_state );
   _vbo_InvalidateState( ctx, new_state );
   _tnl_InvalidateState( ctx, new_state );
   MACH64_CONTEXT(ctx)->NewGLState |= new_state;
}


/* Initialize the context's hardware state */
void mach64DDInitState( mach64ContextPtr mmesa )
{
   GLuint format;

   switch ( mmesa->mach64Screen->cpp ) {
   case 2:
      format = MACH64_DATATYPE_RGB565;
      break;
   case 4:
      format = MACH64_DATATYPE_ARGB8888;
      break;
   default:
      fprintf( stderr, "Error: Unsupported pixel depth... exiting\n" );
      exit( -1 );
   }

   /* Always have a 16-bit depth buffer
    * but Z coordinates are specified in 16.1 format to the setup engine.
    */
   mmesa->depth_scale = 2.0;

   mmesa->ClearColor = 0x00000000;
   mmesa->ClearDepth = 0x0000ffff;

   mmesa->Fallback = 0;

   if ( mmesa->glCtx->Visual.doubleBufferMode ) {
      mmesa->drawOffset = mmesa->readOffset = mmesa->mach64Screen->backOffset;
      mmesa->drawPitch  = mmesa->readPitch  = mmesa->mach64Screen->backPitch;
   } else {
      mmesa->drawOffset = mmesa->readOffset = mmesa->mach64Screen->frontOffset;
      mmesa->drawPitch  = mmesa->readPitch  = mmesa->mach64Screen->frontPitch;
   }

   /* Harware state:
    */
   mmesa->setup.dst_off_pitch = (((mmesa->drawPitch/8) << 22) |
				 (mmesa->drawOffset >> 3));

   mmesa->setup.z_off_pitch = (((mmesa->mach64Screen->depthPitch/8) << 22) |
			       (mmesa->mach64Screen->depthOffset >> 3));

   mmesa->setup.z_cntl = (MACH64_Z_TEST_LESS |
			  MACH64_Z_MASK_EN);

   mmesa->setup.alpha_tst_cntl = (MACH64_ALPHA_TEST_ALWAYS |
				  MACH64_ALPHA_DST_SRCALPHA |
				  MACH64_ALPHA_TST_SRC_TEXEL |
				  (0 << MACH64_REF_ALPHA_SHIFT));

   mmesa->setup.scale_3d_cntl = (MACH64_SCALE_PIX_EXPAND_DYNAMIC_RANGE |
				 /*  MACH64_SCALE_DITHER_ERROR_DIFFUSE | */
				 MACH64_SCALE_DITHER_2D_TABLE |
				 /*  MACH64_DITHER_INIT_CURRENT | */
				 MACH64_DITHER_INIT_RESET |
				 MACH64_SCALE_3D_FCN_SHADE |
				 MACH64_ALPHA_FOG_DIS |
				 MACH64_ALPHA_BLEND_SRC_ONE |
				 MACH64_ALPHA_BLEND_DST_ZERO |
				 MACH64_TEX_LIGHT_FCN_MODULATE |
				 MACH64_MIP_MAP_DISABLE |
				 MACH64_BILINEAR_TEX_EN |
				 MACH64_TEX_BLEND_FCN_LINEAR);

   /* GL spec says dithering initially enabled, but dithering causes
    * problems w/ 24bpp depth
    */
   if ( mmesa->mach64Screen->cpp == 4 )
      mmesa->setup.scale_3d_cntl |= MACH64_ROUND_EN;
   else
      mmesa->setup.scale_3d_cntl |= MACH64_DITHER_EN;

   mmesa->setup.sc_left_right = 0x1fff0000;
   mmesa->setup.sc_top_bottom = 0x3fff0000;

   mmesa->setup.dp_fog_clr    = 0x00ffffff;
   mmesa->setup.dp_write_mask = 0xffffffff;

   mmesa->setup.dp_pix_width = ((format << 0) |
				(format << 4) |
				(format << 8) |
				(format << 16) |
				(format << 28));

   mmesa->setup.dp_mix = (MACH64_BKGD_MIX_S |
			  MACH64_FRGD_MIX_S);
   mmesa->setup.dp_src = (MACH64_BKGD_SRC_3D |
			  MACH64_FRGD_SRC_3D |
			  MACH64_MONO_SRC_ONE);

   mmesa->setup.clr_cmp_cntl  = 0x00000000;
   mmesa->setup.gui_traj_cntl = (MACH64_DST_X_LEFT_TO_RIGHT |
				 MACH64_DST_Y_TOP_TO_BOTTOM);

   mmesa->setup.setup_cntl = (MACH64_FLAT_SHADE_OFF |
			      MACH64_SOLID_MODE_OFF |
			      MACH64_LOG_MAX_INC_ADJ);
   mmesa->setup.setup_cntl = 0;

   mmesa->setup.tex_size_pitch = 0x00000000;

   mmesa->setup.tex_cntl = ((0 << MACH64_LOD_BIAS_SHIFT) |
			    (0 << MACH64_COMP_FACTOR_SHIFT) |
			    MACH64_COMP_COMBINE_MODULATE |
			    MACH64_COMP_BLEND_NEAREST |
			    MACH64_COMP_FILTER_NEAREST |
			    /* MACH64_TEXTURE_TILING | */
#ifdef MACH64_PREMULT_TEXCOORDS
			    MACH64_TEX_ST_DIRECT | 
#endif
			    MACH64_TEX_SRC_LOCAL |
			    MACH64_TEX_UNCOMPRESSED |
			    MACH64_TEX_CACHE_FLUSH |
			    MACH64_TEX_CACHE_SIZE_4K);

   mmesa->setup.secondary_tex_off = 0x00000000;
   mmesa->setup.tex_offset = 0x00000000;

   mmesa->new_state = MACH64_NEW_ALL;
}

/* Initialize the driver's state functions.
  */
void mach64DDInitStateFuncs( GLcontext *ctx )
{
   ctx->Driver.UpdateState		= mach64DDInvalidateState;

   ctx->Driver.ClearIndex		= NULL;
   ctx->Driver.ClearColor		= mach64DDClearColor;
   ctx->Driver.DrawBuffer		= mach64DDDrawBuffer;
   ctx->Driver.ReadBuffer		= mach64DDReadBuffer;

   ctx->Driver.IndexMask		= NULL;
   ctx->Driver.ColorMask		= mach64DDColorMask;
   ctx->Driver.AlphaFunc		= mach64DDAlphaFunc;
   ctx->Driver.BlendEquationSeparate	= mach64DDBlendEquationSeparate;
   ctx->Driver.BlendFuncSeparate	= mach64DDBlendFuncSeparate;
   ctx->Driver.ClearDepth		= mach64DDClearDepth;
   ctx->Driver.CullFace			= mach64DDCullFace;
   ctx->Driver.FrontFace		= mach64DDFrontFace;
   ctx->Driver.DepthFunc		= mach64DDDepthFunc;
   ctx->Driver.DepthMask		= mach64DDDepthMask;
   ctx->Driver.Enable			= mach64DDEnable;
   ctx->Driver.Fogfv			= mach64DDFogfv;
   ctx->Driver.Hint			= NULL;
   ctx->Driver.Lightfv			= NULL;
   ctx->Driver.LightModelfv		= mach64DDLightModelfv;
   ctx->Driver.LogicOpcode		= mach64DDLogicOpCode;
   ctx->Driver.PolygonMode		= NULL;
   ctx->Driver.PolygonStipple		= NULL;
   ctx->Driver.RenderMode		= mach64DDRenderMode;
   ctx->Driver.Scissor			= mach64DDScissor;
   ctx->Driver.ShadeModel		= mach64DDShadeModel;
   
   ctx->Driver.DepthRange		= mach64DepthRange;
   ctx->Driver.Viewport			= mach64Viewport;
}