i915_metaops.c

mesa-6.5-minigui源码

{
   i915->meta.Buffer[I915_DESTREG_DV1] = (DSTORG_HORT_BIAS(0x8) | /* .5 */
					DSTORG_VERT_BIAS(0x8) | /* .5 */
					format |
					LOD_PRECLAMP_OGL |
					TEX_DEFAULT_COLOR_OGL |
					depth_format);

   i915->meta.emitted &= ~I915_UPLOAD_BUFFERS;
/*    fprintf(stderr, "%s: DV1: %x\n",  */
/* 	   __FUNCTION__, i915->meta.Buffer[I915_DESTREG_DV1]); */
}
#endif

static void set_vertex_format( i915ContextPtr i915 )
{
   i915->meta.Ctx[I915_CTXREG_LIS2] = 
      (S2_TEXCOORD_FMT(0, TEXCOORDFMT_2D) |
       S2_TEXCOORD_FMT(1, TEXCOORDFMT_NOT_PRESENT) | 
       S2_TEXCOORD_FMT(2, TEXCOORDFMT_NOT_PRESENT) |
       S2_TEXCOORD_FMT(3, TEXCOORDFMT_NOT_PRESENT) |
       S2_TEXCOORD_FMT(4, TEXCOORDFMT_NOT_PRESENT) |
       S2_TEXCOORD_FMT(5, TEXCOORDFMT_NOT_PRESENT) | 
       S2_TEXCOORD_FMT(6, TEXCOORDFMT_NOT_PRESENT) |
       S2_TEXCOORD_FMT(7, TEXCOORDFMT_NOT_PRESENT));

   i915->meta.Ctx[I915_CTXREG_LIS4] &= ~S4_VFMT_MASK;

   i915->meta.Ctx[I915_CTXREG_LIS4] |= 
      (S4_VFMT_COLOR |
       S4_VFMT_SPEC_FOG |
       S4_VFMT_XYZW);

   i915->meta.emitted &= ~I915_UPLOAD_CTX;

}


static void draw_quad(i915ContextPtr i915, 
		      GLfloat x0, GLfloat x1,
		      GLfloat y0, GLfloat y1, 
		      GLubyte red, GLubyte green,
		      GLubyte blue, GLubyte alpha,
		      GLfloat s0, GLfloat s1,
		      GLfloat t0, GLfloat t1 )
{
   GLuint vertex_size = 8;
   GLuint *vb = intelEmitInlinePrimitiveLocked( &i915->intel, 
						PRIM3D_TRIFAN, 
						4 * vertex_size,
						vertex_size );
   intelVertex tmp;
   int i;

   if (0)
      fprintf(stderr, "%s: %f,%f-%f,%f 0x%x%x%x%x %f,%f-%f,%f\n",
	      __FUNCTION__,
	      x0,y0,x1,y1,red,green,blue,alpha,s0,t0,s1,t1);


   /* initial vertex, left bottom */
   tmp.v.x = x0;
   tmp.v.y = y0;
   tmp.v.z = 1.0;
   tmp.v.w = 1.0; 
   tmp.v.color.red = red;
   tmp.v.color.green = green;
   tmp.v.color.blue = blue;
   tmp.v.color.alpha = alpha;
   tmp.v.specular.red = 0;
   tmp.v.specular.green = 0;
   tmp.v.specular.blue = 0;
   tmp.v.specular.alpha = 0;
   tmp.v.u0 = s0;
   tmp.v.v0 = t0;

   for (i = 0 ; i < vertex_size ; i++)
      vb[i] = tmp.ui[i];

   /* right bottom */
   vb += vertex_size;
   tmp.v.x = x1;
   tmp.v.u0 = s1;
   for (i = 0 ; i < vertex_size ; i++)
      vb[i] = tmp.ui[i];

   /* right top */
   vb += vertex_size;
   tmp.v.y = y1;
   tmp.v.v0 = t1;
   for (i = 0 ; i < vertex_size ; i++)
      vb[i] = tmp.ui[i];

   /* left top */
   vb += vertex_size;
   tmp.v.x = x0;
   tmp.v.u0 = s0;
   for (i = 0 ; i < vertex_size ; i++)
      vb[i] = tmp.ui[i];
}


static void draw_poly(i915ContextPtr i915, 
		      GLubyte red, GLubyte green, GLubyte blue, GLubyte alpha,
                      GLuint numVerts,
                      /*const*/ GLfloat verts[][2],
                      /*const*/ GLfloat texcoords[][2])
{
   GLuint vertex_size = 8;
   GLuint *vb = intelEmitInlinePrimitiveLocked( &i915->intel, 
						PRIM3D_TRIFAN, 
						numVerts * vertex_size,
						vertex_size );
   intelVertex tmp;
   int i, k;

   /* initial constant vertex fields */
   tmp.v.z = 1.0;
   tmp.v.w = 1.0; 
   tmp.v.color.red = red;
   tmp.v.color.green = green;
   tmp.v.color.blue = blue;
   tmp.v.color.alpha = alpha;
   tmp.v.specular.red = 0;
   tmp.v.specular.green = 0;
   tmp.v.specular.blue = 0;
   tmp.v.specular.alpha = 0;

   for (k = 0; k < numVerts; k++) {
      tmp.v.x = verts[k][0];
      tmp.v.y = verts[k][1];
      tmp.v.u0 = texcoords[k][0];
      tmp.v.v0 = texcoords[k][1];

      for (i = 0 ; i < vertex_size ; i++)
         vb[i] = tmp.ui[i];

      vb += vertex_size;
   }
}


void 
i915ClearWithTris(intelContextPtr intel, GLbitfield mask,
		  GLboolean all,
		  GLint cx, GLint cy, GLint cw, GLint ch)
{
   i915ContextPtr i915 = I915_CONTEXT( intel );
   __DRIdrawablePrivate *dPriv = intel->driDrawable;
   intelScreenPrivate *screen = intel->intelScreen;
   int x0, y0, x1, y1;

   SET_STATE( i915, meta ); 
   set_initial_state( i915 ); 
   set_no_texture( i915 ); 
   set_vertex_format( i915 ); 

   LOCK_HARDWARE(intel);

   if (!all) {
      x0 = cx;
      y0 = cy;
      x1 = x0 + cw;
      y1 = y0 + ch;
   } else {
      x0 = 0;
      y0 = 0;
      x1 = x0 + dPriv->w;
      y1 = y0 + dPriv->h;
   }

   /* Don't do any clipping to screen - these are window coordinates.
    * The active cliprects will be applied as for any other geometry.
    */

   if (mask & BUFFER_BIT_FRONT_LEFT) { 
      set_no_depth_stencil_write( i915 );
      set_color_mask( i915, GL_TRUE );
      set_draw_region( i915, &screen->front );

      draw_quad(i915, x0, x1, y0, y1,
		intel->clear_red, intel->clear_green, 
 		intel->clear_blue, intel->clear_alpha, 
		0, 0, 0, 0);
   }

   if (mask & BUFFER_BIT_BACK_LEFT) {
      set_no_depth_stencil_write( i915 );
      set_color_mask( i915, GL_TRUE );
      set_draw_region( i915, &screen->back );

      draw_quad(i915, x0, x1, y0, y1,
		intel->clear_red, intel->clear_green,
		intel->clear_blue, intel->clear_alpha,
		0, 0, 0, 0);
   }

   if (mask & BUFFER_BIT_STENCIL) {
      set_stencil_replace( i915, 
			   intel->ctx.Stencil.WriteMask[0], 
			   intel->ctx.Stencil.Clear);
      
      set_color_mask( i915, GL_FALSE );
      set_draw_region( i915, &screen->front ); /* could be either? */

      draw_quad( i915, x0, x1, y0, y1, 0, 0, 0, 0, 0, 0, 0, 0 );
   }

   UNLOCK_HARDWARE(intel);

   SET_STATE( i915, state );
}


/**
 * Copy the window contents named by dPriv to the rotated (or reflected)
 * color buffer.
 * srcBuf is BUFFER_BIT_FRONT_LEFT or BUFFER_BIT_BACK_LEFT to indicate the source.
 */
void
i915RotateWindow(intelContextPtr intel, __DRIdrawablePrivate *dPriv,
                 GLuint srcBuf)
{
   i915ContextPtr i915 = I915_CONTEXT( intel );
   intelScreenPrivate *screen = intel->intelScreen;
   const GLuint cpp = screen->cpp;
   drm_clip_rect_t fullRect;
   GLuint textureFormat, srcOffset, srcPitch;
   const drm_clip_rect_t *clipRects;
   int numClipRects;
   int i;

   int xOrig, yOrig;
   int origNumClipRects;
   drm_clip_rect_t *origRects;

   /*
    * set up hardware state
    */
   intelFlush( &intel->ctx );

   SET_STATE( i915, meta ); 
   set_initial_state( i915 ); 
   set_no_texture( i915 ); 
   set_vertex_format( i915 ); 
   set_no_depth_stencil_write( i915 );
   set_color_mask( i915, GL_TRUE );

   LOCK_HARDWARE(intel);

   /* save current drawing origin and cliprects (restored at end) */
   xOrig = intel->drawX;
   yOrig = intel->drawY;
   origNumClipRects = intel->numClipRects;
   origRects = intel->pClipRects;

   if (!intel->numClipRects)
      goto done;

   /*
    * set drawing origin, cliprects for full-screen access to rotated screen
    */
   fullRect.x1 = 0;
   fullRect.y1 = 0;
   fullRect.x2 = screen->rotatedWidth;
   fullRect.y2 = screen->rotatedHeight;
   intel->drawX = 0;
   intel->drawY = 0;
   intel->numClipRects = 1;
   intel->pClipRects = &fullRect;

   set_draw_region( i915, &screen->rotated );

   if (cpp == 4)
      textureFormat = MAPSURF_32BIT | MT_32BIT_ARGB8888;
   else
      textureFormat = MAPSURF_16BIT | MT_16BIT_RGB565;

   if (srcBuf == BUFFER_BIT_FRONT_LEFT) {
      srcPitch = screen->front.pitch;   /* in bytes */
      srcOffset = screen->front.offset; /* bytes */
      clipRects = dPriv->pClipRects;
      numClipRects = dPriv->numClipRects;
   }
   else {
      srcPitch = screen->back.pitch;   /* in bytes */
      srcOffset = screen->back.offset; /* bytes */
      clipRects = dPriv->pBackClipRects;
      numClipRects = dPriv->numBackClipRects;
   }

   /* set the whole screen up as a texture to avoid alignment issues */
   set_tex_rect_source(i915,
                       srcOffset,
                       screen->width,
		       screen->height,
                       srcPitch,
                       textureFormat);

   enable_texture_blend_replace(i915);

   /*
    * loop over the source window's cliprects
    */
   for (i = 0; i < numClipRects; i++) {
      int srcX0 = clipRects[i].x1;
      int srcY0 = clipRects[i].y1;
      int srcX1 = clipRects[i].x2;
      int srcY1 = clipRects[i].y2;
      GLfloat verts[4][2], tex[4][2];
      int j;

      /* build vertices for four corners of clip rect */
      verts[0][0] = srcX0;  verts[0][1] = srcY0;
      verts[1][0] = srcX1;  verts[1][1] = srcY0;
      verts[2][0] = srcX1;  verts[2][1] = srcY1;
      verts[3][0] = srcX0;  verts[3][1] = srcY1;

      /* .. and texcoords */
      tex[0][0] = srcX0;  tex[0][1] = srcY0;
      tex[1][0] = srcX1;  tex[1][1] = srcY0;
      tex[2][0] = srcX1;  tex[2][1] = srcY1;
      tex[3][0] = srcX0;  tex[3][1] = srcY1;

      /* transform coords to rotated screen coords */
      for (j = 0; j < 4; j++) {
         matrix23TransformCoordf(&screen->rotMatrix,
                                 &verts[j][0], &verts[j][1]);
      }

      /* draw polygon to map source image to dest region */
      draw_poly(i915, 255, 255, 255, 255, 4, verts, tex);

   } /* cliprect loop */

   intelFlushBatchLocked( intel, GL_FALSE, GL_FALSE, GL_FALSE );

 done:
   /* restore original drawing origin and cliprects */
   intel->drawX = xOrig;
   intel->drawY = yOrig;
   intel->numClipRects = origNumClipRects;
   intel->pClipRects = origRects;

   UNLOCK_HARDWARE(intel);

   SET_STATE( i915, state );
}