r128_state.c

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

{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);
   FALLBACK( rmesa, R128_FALLBACK_RENDER_MODE, (mode != GL_RENDER) );
}



/* =============================================================
 * State enable/disable
 */

static void r128DDEnable( GLcontext *ctx, GLenum cap, GLboolean state )
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);

   if ( R128_DEBUG & DEBUG_VERBOSE_API ) {
      fprintf( stderr, "%s( %s = %s )\n",
	       __FUNCTION__, _mesa_lookup_enum_by_nr( cap ),
	       state ? "GL_TRUE" : "GL_FALSE" );
   }

   switch ( cap ) {
   case GL_ALPHA_TEST:
      FLUSH_BATCH( rmesa );
      rmesa->new_state |= R128_NEW_ALPHA;
      break;

   case GL_BLEND:
      FLUSH_BATCH( rmesa );
      rmesa->new_state |= R128_NEW_ALPHA;

      /* For some reason enable(GL_BLEND) affects ColorLogicOpEnabled.
       */
      FALLBACK( rmesa, R128_FALLBACK_LOGICOP,
		(ctx->Color.ColorLogicOpEnabled &&
		 ctx->Color.LogicOp != GL_COPY));
      break;

   case GL_CULL_FACE:
      FLUSH_BATCH( rmesa );
      rmesa->new_state |= R128_NEW_CULL;
      break;

   case GL_DEPTH_TEST:
      FLUSH_BATCH( rmesa );
      rmesa->new_state |= R128_NEW_DEPTH;
      break;

   case GL_DITHER:
      do {
	 GLuint t = rmesa->setup.tex_cntl_c;
	 FLUSH_BATCH( rmesa );

	 if ( ctx->Color.DitherFlag ) {
	    t |=  R128_DITHER_ENABLE;
	 } else {
	    t &= ~R128_DITHER_ENABLE;
	 }

	 if ( rmesa->setup.tex_cntl_c != t ) {
	    rmesa->setup.tex_cntl_c = t;
	    rmesa->dirty |= R128_UPLOAD_CONTEXT;
	 }
      } while (0);
      break;

   case GL_FOG:
      FLUSH_BATCH( rmesa );
      rmesa->new_state |= R128_NEW_FOG;
      break;

   case GL_COLOR_LOGIC_OP:
      FLUSH_BATCH( rmesa );
      FALLBACK( rmesa, R128_FALLBACK_LOGICOP,
		state && ctx->Color.LogicOp != GL_COPY );
      break;

   case GL_LIGHTING:
   case GL_COLOR_SUM_EXT:
      updateSpecularLighting(ctx);
      break;

   case GL_SCISSOR_TEST:
      FLUSH_BATCH( rmesa );
      rmesa->scissor = state;
      rmesa->new_state |= R128_NEW_CLIP;
      break;

   case GL_STENCIL_TEST:
      FLUSH_BATCH( rmesa );
      if ( ctx->Visual.stencilBits > 0 && ctx->Visual.depthBits == 24 ) {
	 if ( state ) {
	    rmesa->setup.tex_cntl_c |=  R128_STENCIL_ENABLE;
	    /* Reset the fallback (if any) for bad stencil funcs */
	    r128DDStencilOpSeparate( ctx, 0, ctx->Stencil.FailFunc[0],
				     ctx->Stencil.ZFailFunc[0],
				     ctx->Stencil.ZPassFunc[0] );
	 } else {
	    rmesa->setup.tex_cntl_c &= ~R128_STENCIL_ENABLE;
	    FALLBACK( rmesa, R128_FALLBACK_STENCIL, GL_FALSE );
	 }
	 rmesa->dirty |= R128_UPLOAD_CONTEXT;
      } else {
	 FALLBACK( rmesa, R128_FALLBACK_STENCIL, state );
      }
      break;

   case GL_TEXTURE_1D:
   case GL_TEXTURE_2D:
   case GL_TEXTURE_3D:
      FLUSH_BATCH( rmesa );
      break;

   case GL_POLYGON_STIPPLE:
      if ( rmesa->render_primitive == GL_TRIANGLES ) {
	 FLUSH_BATCH( rmesa );
	 rmesa->setup.dp_gui_master_cntl_c &= ~R128_GMC_BRUSH_NONE;
	 if ( state ) {
	    rmesa->setup.dp_gui_master_cntl_c |=
	       R128_GMC_BRUSH_32x32_MONO_FG_LA;
	 } else {
	    rmesa->setup.dp_gui_master_cntl_c |=
	       R128_GMC_BRUSH_SOLID_COLOR;
	 }
	 rmesa->new_state |= R128_NEW_CONTEXT;
	 rmesa->dirty |= R128_UPLOAD_CONTEXT;
      }
      break;

   default:
      return;
   }
}


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

static void r128DDPrintDirty( const char *msg, GLuint state )
{
   fprintf( stderr,
	    "%s: (0x%x) %s%s%s%s%s%s%s%s%s\n",
	    msg,
	    state,
	    (state & R128_UPLOAD_CORE)		? "core, " : "",
	    (state & R128_UPLOAD_CONTEXT)	? "context, " : "",
	    (state & R128_UPLOAD_SETUP)		? "setup, " : "",
	    (state & R128_UPLOAD_TEX0)		? "tex0, " : "",
	    (state & R128_UPLOAD_TEX1)		? "tex1, " : "",
	    (state & R128_UPLOAD_MASKS)		? "masks, " : "",
	    (state & R128_UPLOAD_WINDOW)	? "window, " : "",
	    (state & R128_UPLOAD_CLIPRECTS)	? "cliprects, " : "",
	    (state & R128_REQUIRE_QUIESCENCE)	? "quiescence, " : "" );
}

/*
 * 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 r128EmitHwStateLocked( r128ContextPtr rmesa )
{
   drm_r128_sarea_t *sarea = rmesa->sarea;
   drm_r128_context_regs_t *regs = &(rmesa->setup);
   const r128TexObjPtr t0 = rmesa->CurrentTexObj[0];
   const r128TexObjPtr t1 = rmesa->CurrentTexObj[1];

   if ( R128_DEBUG & DEBUG_VERBOSE_MSG ) {
      r128DDPrintDirty( "r128EmitHwStateLocked", rmesa->dirty );
   }

   if ( rmesa->dirty & (R128_UPLOAD_CONTEXT |
			R128_UPLOAD_SETUP |
			R128_UPLOAD_MASKS |
			R128_UPLOAD_WINDOW |
			R128_UPLOAD_CORE) ) {
      memcpy( &sarea->context_state, regs, sizeof(sarea->context_state) );
      
      if( rmesa->dirty & R128_UPLOAD_CONTEXT )
      {
         /* One possible side-effect of uploading a new context is the
          * setting of the R128_GMC_AUX_CLIP_DIS bit, which causes all
          * auxilliary cliprects to be disabled. So the next command must
          * upload them again. */
         rmesa->dirty |= R128_UPLOAD_CLIPRECTS;
      }
   }

   if ( (rmesa->dirty & R128_UPLOAD_TEX0) && t0 ) {
      drm_r128_texture_regs_t *tex = &sarea->tex_state[0];

      tex->tex_cntl		= t0->setup.tex_cntl;
      tex->tex_combine_cntl	= rmesa->tex_combine[0];
      tex->tex_size_pitch	= t0->setup.tex_size_pitch;
      memcpy( &tex->tex_offset[0], &t0->setup.tex_offset[0],
	      sizeof(tex->tex_offset ) );
      tex->tex_border_color	= t0->setup.tex_border_color;
   }

   if ( (rmesa->dirty & R128_UPLOAD_TEX1) && t1 ) {
      drm_r128_texture_regs_t *tex = &sarea->tex_state[1];

      tex->tex_cntl		= t1->setup.tex_cntl;
      tex->tex_combine_cntl	= rmesa->tex_combine[1];
      tex->tex_size_pitch	= t1->setup.tex_size_pitch;
      memcpy( &tex->tex_offset[0], &t1->setup.tex_offset[0],
	      sizeof(tex->tex_offset ) );
      tex->tex_border_color	= t1->setup.tex_border_color;
   }

   sarea->vertsize = rmesa->vertex_size;
   sarea->vc_format = rmesa->vertex_format;

   /* Turn off the texture cache flushing */
   rmesa->setup.tex_cntl_c &= ~R128_TEX_CACHE_FLUSH;

   sarea->dirty |= rmesa->dirty;
   rmesa->dirty &= R128_UPLOAD_CLIPRECTS;
}

static void r128DDPrintState( const char *msg, GLuint flags )
{
   fprintf( stderr,
	    "%s: (0x%x) %s%s%s%s%s%s%s%s\n",
	    msg,
	    flags,
	    (flags & R128_NEW_CONTEXT)	? "context, " : "",
	    (flags & R128_NEW_ALPHA)	? "alpha, " : "",
	    (flags & R128_NEW_DEPTH)	? "depth, " : "",
	    (flags & R128_NEW_FOG)	? "fog, " : "",
	    (flags & R128_NEW_CLIP)	? "clip, " : "",
	    (flags & R128_NEW_CULL)	? "cull, " : "",
	    (flags & R128_NEW_MASKS)	? "masks, " : "",
	    (flags & R128_NEW_WINDOW)	? "window, " : "" );
}

void r128DDUpdateHWState( GLcontext *ctx )
{
   r128ContextPtr rmesa = R128_CONTEXT(ctx);
   int new_state = rmesa->new_state;

   if ( new_state || rmesa->NewGLState & _NEW_TEXTURE )
   {
      FLUSH_BATCH( rmesa );

      rmesa->new_state = 0;

      if ( R128_DEBUG & DEBUG_VERBOSE_MSG )
	 r128DDPrintState( "r128UpdateHwState", new_state );

      /* Update the various parts of the context's state.
       */
      if ( new_state & R128_NEW_ALPHA )
	 r128UpdateAlphaMode( ctx );

      if ( new_state & R128_NEW_DEPTH )
	 r128UpdateZMode( ctx );

      if ( new_state & R128_NEW_FOG )
	 r128UpdateFogAttrib( ctx );

      if ( new_state & R128_NEW_CLIP )
	 r128UpdateClipping( ctx );

      if ( new_state & R128_NEW_CULL )
	 r128UpdateCull( ctx );

      if ( new_state & R128_NEW_MASKS )
	 r128UpdateMasks( ctx );

      if ( new_state & R128_NEW_WINDOW )
      {
	 r128UpdateWindow( ctx );
	 r128CalcViewport( ctx );
      }

      if ( rmesa->NewGLState & _NEW_TEXTURE ) {
	 r128UpdateTextureState( ctx );
      }
   }
}


static void r128DDInvalidateState( 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 );
   R128_CONTEXT(ctx)->NewGLState |= new_state;
}



/* Initialize the context's hardware state.
 */
void r128DDInitState( r128ContextPtr rmesa )
{
   int dst_bpp, depth_bpp;

   switch ( rmesa->r128Screen->cpp ) {
   case 2:
      dst_bpp = R128_GMC_DST_16BPP;
      break;
   case 4:
      dst_bpp = R128_GMC_DST_32BPP;
      break;
   default:
      fprintf( stderr, "Error: Unsupported pixel depth... exiting\n" );
      exit( -1 );
   }

   rmesa->ClearColor = 0x00000000;

   switch ( rmesa->glCtx->Visual.depthBits ) {
   case 16:
      rmesa->ClearDepth = 0x0000ffff;
      depth_bpp = R128_Z_PIX_WIDTH_16;
      rmesa->depth_scale = 1.0 / (GLfloat)0xffff;
      break;
   case 24:
      rmesa->ClearDepth = 0x00ffffff;
      depth_bpp = R128_Z_PIX_WIDTH_24;
      rmesa->depth_scale = 1.0 / (GLfloat)0xffffff;
      break;
   default:
      fprintf( stderr, "Error: Unsupported depth %d... exiting\n",
	       rmesa->glCtx->Visual.depthBits );
      exit( -1 );
   }

   rmesa->Fallback = 0;

   /* Hardware state:
    */
   rmesa->setup.dp_gui_master_cntl_c = (R128_GMC_DST_PITCH_OFFSET_CNTL |
					R128_GMC_DST_CLIPPING |
					R128_GMC_BRUSH_SOLID_COLOR |
					dst_bpp |
					R128_GMC_SRC_DATATYPE_COLOR |
					R128_GMC_BYTE_MSB_TO_LSB |
					R128_GMC_CONVERSION_TEMP_6500 |
					R128_ROP3_S |
					R128_DP_SRC_SOURCE_MEMORY |
					R128_GMC_3D_FCN_EN |
					R128_GMC_CLR_CMP_CNTL_DIS |
					R128_GMC_AUX_CLIP_DIS |
					R128_GMC_WR_MSK_DIS);

   rmesa->setup.sc_top_left_c     = 0x00000000;
   rmesa->setup.sc_bottom_right_c = 0x1fff1fff;

   rmesa->setup.z_offset_c = rmesa->r128Screen->depthOffset;
   rmesa->setup.z_pitch_c = ((rmesa->r128Screen->depthPitch >> 3) |
			     R128_Z_TILE);

   rmesa->setup.z_sten_cntl_c = (depth_bpp |
				 R128_Z_TEST_LESS |
				 R128_STENCIL_TEST_ALWAYS |
				 R128_STENCIL_S_FAIL_KEEP |
				 R128_STENCIL_ZPASS_KEEP |
				 R128_STENCIL_ZFAIL_KEEP);

   rmesa->setup.tex_cntl_c = (R128_Z_WRITE_ENABLE |
			      R128_SHADE_ENABLE |
			      R128_DITHER_ENABLE |
			      R128_ALPHA_IN_TEX_COMPLETE_A |
			      R128_LIGHT_DIS |
			      R128_ALPHA_LIGHT_DIS |
			      R128_TEX_CACHE_FLUSH |
			      (0x3f << R128_LOD_BIAS_SHIFT));

   rmesa->setup.misc_3d_state_cntl_reg = (R128_MISC_SCALE_3D_TEXMAP_SHADE |
					  R128_MISC_SCALE_PIX_REPLICATE |
					  R128_ALPHA_COMB_ADD_CLAMP |
					  R128_FOG_VERTEX |
					  (R128_ALPHA_BLEND_ONE << R128_ALPHA_BLEND_SRC_SHIFT) |
					  (R128_ALPHA_BLEND_ZERO << R128_ALPHA_BLEND_DST_SHIFT) |
					  R128_ALPHA_TEST_ALWAYS);

   rmesa->setup.texture_clr_cmp_clr_c = 0x00000000;
   rmesa->setup.texture_clr_cmp_msk_c = 0xffffffff;

   rmesa->setup.fog_color_c = 0x00000000;

   rmesa->setup.pm4_vc_fpu_setup = (R128_FRONT_DIR_CCW |
				    R128_BACKFACE_SOLID |
				    R128_FRONTFACE_SOLID |
				    R128_FPU_COLOR_GOURAUD |
				    R128_FPU_SUB_PIX_4BITS |
				    R128_FPU_MODE_3D |
				    R128_TRAP_BITS_DISABLE |
				    R128_XFACTOR_2 |
				    R128_YFACTOR_2 |
				    R128_FLAT_SHADE_VERTEX_OGL |
				    R128_FPU_ROUND_TRUNCATE |
				    R128_WM_SEL_8DW);

   rmesa->setup.setup_cntl = (R128_COLOR_GOURAUD |
			      R128_PRIM_TYPE_TRI |
			      R128_TEXTURE_ST_MULT_W |
			      R128_STARTING_VERTEX_1 |
			      R128_ENDING_VERTEX_3 |
			      R128_SU_POLY_LINE_NOT_LAST |
			      R128_SUB_PIX_4BITS);

   rmesa->setup.tex_size_pitch_c = 0x00000000;
   rmesa->setup.constant_color_c = 0x00ffffff;

   rmesa->setup.dp_write_mask   = 0xffffffff;
   rmesa->setup.sten_ref_mask_c = 0xffff0000;
   rmesa->setup.plane_3d_mask_c = 0xffffffff;

   rmesa->setup.window_xy_offset = 0x00000000;

   rmesa->setup.scale_3d_cntl = (R128_SCALE_DITHER_TABLE |
				 R128_TEX_CACHE_SIZE_FULL |
				 R128_DITHER_INIT_RESET |
				 R128_SCALE_3D_TEXMAP_SHADE |
				 R128_SCALE_PIX_REPLICATE |
				 R128_ALPHA_COMB_ADD_CLAMP |
				 R128_FOG_VERTEX |
				 (R128_ALPHA_BLEND_ONE << R128_ALPHA_BLEND_SRC_SHIFT) |
				 (R128_ALPHA_BLEND_ZERO << R128_ALPHA_BLEND_DST_SHIFT) |
				 R128_ALPHA_TEST_ALWAYS |
				 R128_COMPOSITE_SHADOW_CMP_EQUAL |
				 R128_TEX_MAP_ALPHA_IN_TEXTURE |
				 R128_TEX_CACHE_LINE_SIZE_4QW);

   rmesa->new_state = R128_NEW_ALL;
}

/* Initialize the driver's state functions.
 */
void r128DDInitStateFuncs( GLcontext *ctx )
{
   ctx->Driver.UpdateState		= r128DDInvalidateState;

   ctx->Driver.ClearIndex		= NULL;
   ctx->Driver.ClearColor		= r128DDClearColor;
   ctx->Driver.ClearStencil		= r128DDClearStencil;
   ctx->Driver.DrawBuffer		= r128DDDrawBuffer;
   ctx->Driver.ReadBuffer		= r128DDReadBuffer;

   ctx->Driver.IndexMask		= NULL;
   ctx->Driver.ColorMask		= r128DDColorMask;
   ctx->Driver.AlphaFunc		= r128DDAlphaFunc;
   ctx->Driver.BlendEquationSeparate	= r128DDBlendEquationSeparate;
   ctx->Driver.BlendFuncSeparate	= r128DDBlendFuncSeparate;
   ctx->Driver.ClearDepth		= r128DDClearDepth;
   ctx->Driver.CullFace			= r128DDCullFace;
   ctx->Driver.FrontFace		= r128DDFrontFace;
   ctx->Driver.DepthFunc		= r128DDDepthFunc;
   ctx->Driver.DepthMask		= r128DDDepthMask;
   ctx->Driver.Enable			= r128DDEnable;
   ctx->Driver.Fogfv			= r128DDFogfv;
   ctx->Driver.Hint			= NULL;
   ctx->Driver.Lightfv			= NULL;
   ctx->Driver.LightModelfv		= r128DDLightModelfv;
   ctx->Driver.LogicOpcode		= r128DDLogicOpCode;
   ctx->Driver.PolygonMode		= NULL;
   ctx->Driver.PolygonStipple		= r128DDPolygonStipple;
   ctx->Driver.RenderMode		= r128DDRenderMode;
   ctx->Driver.Scissor			= r128DDScissor;
   ctx->Driver.ShadeModel		= r128DDShadeModel;
   ctx->Driver.StencilFuncSeparate	= r128DDStencilFuncSeparate;
   ctx->Driver.StencilMaskSeparate	= r128DDStencilMaskSeparate;
   ctx->Driver.StencilOpSeparate	= r128DDStencilOpSeparate;

   ctx->Driver.DepthRange               = r128DepthRange;
   ctx->Driver.Viewport                 = r128Viewport;
}