brw_metaops.c

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

   brw->metaops.attribs.Texture->Unit[ 0 ]._ReallyEnabled = 0;

   brw->state.dirty.mesa |= _NEW_TEXTURE | _NEW_PROGRAM;
}

static void meta_texture_blend_replace(struct intel_context *intel)
{
   struct brw_context *brw = brw_context(&intel->ctx);

   brw->metaops.attribs.Texture->CurrentUnit = 0;
   brw->metaops.attribs.Texture->_EnabledUnits = 1;
   brw->metaops.attribs.Texture->_EnabledCoordUnits = 1;
   brw->metaops.attribs.Texture->Unit[ 0 ].Enabled = TEXTURE_2D_BIT;
   brw->metaops.attribs.Texture->Unit[ 0 ]._ReallyEnabled = TEXTURE_2D_BIT;
   brw->metaops.attribs.Texture->Unit[ 0 ].Current2D =
      intel->frame_buffer_texobj;
   brw->metaops.attribs.Texture->Unit[ 0 ]._Current =
      intel->frame_buffer_texobj;

   brw->state.dirty.mesa |= _NEW_TEXTURE | _NEW_PROGRAM;
}

static void meta_import_pixel_state(struct intel_context *intel)
{
   struct brw_context *brw = brw_context(&intel->ctx);
   
   RESTORE(brw, Color, _NEW_COLOR);
   RESTORE(brw, Depth, _NEW_DEPTH);
   RESTORE(brw, Fog, _NEW_FOG);
   RESTORE(brw, Scissor, _NEW_SCISSOR);
   RESTORE(brw, Stencil, _NEW_STENCIL);
   RESTORE(brw, Texture, _NEW_TEXTURE);
   RESTORE(brw, FragmentProgram, _NEW_PROGRAM);
}

static void meta_frame_buffer_texture( struct intel_context *intel,
				       GLint xoff, GLint yoff )
{
   struct brw_context *brw = brw_context(&intel->ctx);
   struct intel_region *region = intel_drawbuf_region( intel );
   
   INSTALL(brw, FragmentProgram, _NEW_PROGRAM);

   brw->metaops.attribs.FragmentProgram->_Current = brw->metaops.fp_tex;
   /* This is unfortunate, but seems to be necessary, since later on we
      will end up calling _mesa_load_state_parameters to lookup the
      local params (below), and that will want to look in ctx.FragmentProgram
      instead of brw->attribs.FragmentProgram. */
   intel->ctx.FragmentProgram.Current = brw->metaops.fp_tex;

   brw->metaops.fp_tex->Base.LocalParams[ 0 ][ 0 ] = xoff;
   brw->metaops.fp_tex->Base.LocalParams[ 0 ][ 1 ] = yoff;
   brw->metaops.fp_tex->Base.LocalParams[ 0 ][ 2 ] = 0.0;
   brw->metaops.fp_tex->Base.LocalParams[ 0 ][ 3 ] = 0.0;
   brw->metaops.fp_tex->Base.LocalParams[ 1 ][ 0 ] =
      1.0 / region->pitch;
   brw->metaops.fp_tex->Base.LocalParams[ 1 ][ 1 ] =
      -1.0 / region->height;
   brw->metaops.fp_tex->Base.LocalParams[ 1 ][ 2 ] = 0.0;
   brw->metaops.fp_tex->Base.LocalParams[ 1 ][ 3 ] = 1.0;
   
   brw->state.dirty.mesa |= _NEW_PROGRAM;
}


static void meta_draw_region( struct intel_context *intel,
			     struct intel_region *draw_region,
			     struct intel_region *depth_region )
{
   struct brw_context *brw = brw_context(&intel->ctx);

   if (!brw->metaops.saved_draw_region) {
      brw->metaops.saved_draw_region = brw->state.draw_regions[0];
      brw->metaops.saved_nr_draw_regions = brw->state.nr_draw_regions;
      brw->metaops.saved_depth_region = brw->state.depth_region;
   }

   brw->state.draw_regions[0] = draw_region;
   brw->state.nr_draw_regions = 1;
   brw->state.depth_region = depth_region;

   if (intel->frame_buffer_texobj != NULL)
      brw_FrameBufferTexDestroy(brw);

   if (draw_region)
       brw_FrameBufferTexInit(brw, draw_region);

   brw->state.dirty.mesa |= _NEW_BUFFERS;
}


static void meta_draw_quad(struct intel_context *intel, 
			   GLfloat x0, GLfloat x1,
			   GLfloat y0, GLfloat y1, 
			   GLfloat z,
			   GLuint color,
			   GLfloat s0, GLfloat s1,
			   GLfloat t0, GLfloat t1)
{
   GLcontext *ctx = &intel->ctx;
   struct brw_context *brw = brw_context(&intel->ctx);
   struct gl_client_array pos_array;
   struct gl_client_array color_array;
   struct gl_client_array *attribs[VERT_ATTRIB_MAX];
   struct _mesa_prim prim[1];
   GLfloat pos[4][3];

   ctx->Driver.BufferData(ctx,
			  GL_ARRAY_BUFFER_ARB,
			  sizeof(pos) + sizeof(color),
			  NULL,
			  GL_DYNAMIC_DRAW_ARB,
			  brw->metaops.vbo);

   pos[0][0] = x0;
   pos[0][1] = y0;
   pos[0][2] = z;

   pos[1][0] = x1;
   pos[1][1] = y0;
   pos[1][2] = z;

   pos[2][0] = x1;
   pos[2][1] = y1;
   pos[2][2] = z;

   pos[3][0] = x0;
   pos[3][1] = y1;
   pos[3][2] = z;

   ctx->Driver.BufferSubData(ctx,
			     GL_ARRAY_BUFFER_ARB,
			     0,
			     sizeof(pos),
			     pos,
			     brw->metaops.vbo);

   /* Convert incoming ARGB to required RGBA */
   /* Note this color is stored as GL_UNSIGNED_BYTE */
   color = (color & 0xff00ff00) | (((color >> 16) | (color << 16)) & 0xff00ff);

   ctx->Driver.BufferSubData(ctx,
			     GL_ARRAY_BUFFER_ARB,
			     sizeof(pos),
			     sizeof(color),
			     &color,
			     brw->metaops.vbo);

   /* Ignoring texture coords. 
    */

   memset(attribs, 0, VERT_ATTRIB_MAX * sizeof(*attribs));

   attribs[VERT_ATTRIB_POS] = &pos_array;
   attribs[VERT_ATTRIB_POS]->Ptr = 0;
   attribs[VERT_ATTRIB_POS]->Type = GL_FLOAT;
   attribs[VERT_ATTRIB_POS]->Enabled = 1;
   attribs[VERT_ATTRIB_POS]->Size = 3;
   attribs[VERT_ATTRIB_POS]->StrideB = 3 * sizeof(GLfloat);
   attribs[VERT_ATTRIB_POS]->Stride = 3 * sizeof(GLfloat);
   attribs[VERT_ATTRIB_POS]->_MaxElement = 4;
   attribs[VERT_ATTRIB_POS]->Normalized = 0;
   attribs[VERT_ATTRIB_POS]->BufferObj = brw->metaops.vbo;

   attribs[VERT_ATTRIB_COLOR0] = &color_array;
   attribs[VERT_ATTRIB_COLOR0]->Ptr = (const GLubyte *)sizeof(pos);
   attribs[VERT_ATTRIB_COLOR0]->Type = GL_UNSIGNED_BYTE;
   attribs[VERT_ATTRIB_COLOR0]->Enabled = 1;
   attribs[VERT_ATTRIB_COLOR0]->Size = 4;
   attribs[VERT_ATTRIB_COLOR0]->StrideB = 0;
   attribs[VERT_ATTRIB_COLOR0]->Stride = 0;
   attribs[VERT_ATTRIB_COLOR0]->_MaxElement = 1;
   attribs[VERT_ATTRIB_COLOR0]->Normalized = 1;
   attribs[VERT_ATTRIB_COLOR0]->BufferObj = brw->metaops.vbo;
   
   /* Just ignoring texture coordinates for now. 
    */

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

   prim[0].mode = GL_TRIANGLE_FAN;
   prim[0].begin = 1;
   prim[0].end = 1;
   prim[0].weak = 0;
   prim[0].pad = 0;
   prim[0].start = 0;
   prim[0].count = 4;

   brw_draw_prims(&brw->intel.ctx, 
		  (const struct gl_client_array **)attribs,
		  prim, 1,
		  NULL,
		  0,
		  3 );
}


static void install_meta_state( struct intel_context *intel )
{
   GLcontext *ctx = &intel->ctx;
   struct brw_context *brw = brw_context(ctx);
   GLuint i;

   if (!brw->metaops.vbo) {
      init_metaops_state(brw);
   }

   install_attribs(brw);
   
   meta_no_texture(&brw->intel);
   meta_flat_shade(&brw->intel);
   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
      brw->metaops.restore_draw_buffers[i]
         = ctx->DrawBuffer->_ColorDrawBufferIndexes[i];
   }
   brw->metaops.restore_num_draw_buffers = ctx->DrawBuffer->_NumColorDrawBuffers;

   brw->metaops.restore_fp = ctx->FragmentProgram.Current;

   /* This works without adjusting refcounts.  Fix later? 
    */
   brw->metaops.saved_draw_region = brw->state.draw_regions[0];
   brw->metaops.saved_nr_draw_regions = brw->state.nr_draw_regions;
   brw->metaops.saved_depth_region = brw->state.depth_region;
   brw->metaops.active = 1;
   
   brw->state.dirty.brw |= BRW_NEW_METAOPS;
}

static void leave_meta_state( struct intel_context *intel )
{
   GLcontext *ctx = &intel->ctx;
   struct brw_context *brw = brw_context(ctx);
   GLuint i;

   restore_attribs(brw);

   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
      ctx->DrawBuffer->_ColorDrawBufferIndexes[i]
         = brw->metaops.restore_draw_buffers[i];
   }
   ctx->DrawBuffer->_NumColorDrawBuffers = brw->metaops.restore_num_draw_buffers;

   ctx->FragmentProgram.Current = brw->metaops.restore_fp;

   brw->state.draw_regions[0] = brw->metaops.saved_draw_region;
   brw->state.nr_draw_regions = brw->metaops.saved_nr_draw_regions;
   brw->state.depth_region = brw->metaops.saved_depth_region;
   brw->metaops.saved_draw_region = NULL;
   brw->metaops.saved_depth_region = NULL;
   brw->metaops.active = 0;

   brw->state.dirty.mesa |= _NEW_BUFFERS;
   brw->state.dirty.brw |= BRW_NEW_METAOPS;
}



void brw_init_metaops( struct brw_context *brw )
{
   init_attribs(brw);


   brw->intel.vtbl.install_meta_state = install_meta_state;
   brw->intel.vtbl.leave_meta_state = leave_meta_state;
   brw->intel.vtbl.meta_no_depth_write = meta_no_depth_write;
   brw->intel.vtbl.meta_no_stencil_write = meta_no_stencil_write;
   brw->intel.vtbl.meta_stencil_replace = meta_stencil_replace;
   brw->intel.vtbl.meta_depth_replace = meta_depth_replace;
   brw->intel.vtbl.meta_color_mask = meta_color_mask;
   brw->intel.vtbl.meta_no_texture = meta_no_texture;
   brw->intel.vtbl.meta_import_pixel_state = meta_import_pixel_state;
   brw->intel.vtbl.meta_frame_buffer_texture = meta_frame_buffer_texture;
   brw->intel.vtbl.meta_draw_region = meta_draw_region;
   brw->intel.vtbl.meta_draw_quad = meta_draw_quad;
   brw->intel.vtbl.meta_texture_blend_replace = meta_texture_blend_replace;
/*    brw->intel.vtbl.meta_tex_rect_source = meta_tex_rect_source; */
/*    brw->intel.vtbl.meta_draw_format = set_draw_format; */
}

void brw_destroy_metaops( struct brw_context *brw )
{
   GLcontext *ctx = &brw->intel.ctx;

   if (brw->metaops.vbo)
      ctx->Driver.DeleteBuffer( ctx, brw->metaops.vbo );

/*    ctx->Driver.DeleteProgram( ctx, brw->metaops.fp ); */
/*    ctx->Driver.DeleteProgram( ctx, brw->metaops.fp_tex ); */
/*    ctx->Driver.DeleteProgram( ctx, brw->metaops.vp ); */
}