i830_metaops.c

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

/*    fprintf(stderr, "%s: TexBlendWordsUsed[0]: %d\n",  */
/* 	   __FUNCTION__, i830->meta.TexBlendWordsUsed[0]); */
}



/* Set up an arbitary piece of memory as a rectangular texture
 * (including the front or back buffer).
 */
static GLboolean
set_tex_rect_source(struct intel_context *intel,
                    dri_bo *buffer,
                    GLuint offset,
                    GLuint pitch, GLuint height, GLenum format, GLenum type)
{
   struct i830_context *i830 = i830_context(&intel->ctx);
   GLuint *setup = i830->meta.Tex[0];
   GLint numLevels = 1;
   GLuint textureFormat;
   GLuint cpp;

   /* A full implementation of this would do the upload through
    * glTexImage2d, and get all the conversion operations at that
    * point.  We are restricted, but still at least have access to the
    * fragment program swizzle.
    */
   switch (format) {
   case GL_BGRA:
      switch (type) {
      case GL_UNSIGNED_INT_8_8_8_8_REV:
      case GL_UNSIGNED_BYTE:
         textureFormat = (MAPSURF_32BIT | MT_32BIT_ARGB8888);
         cpp = 4;
         break;
      default:
         return GL_FALSE;
      }
      break;
   case GL_RGBA:
      switch (type) {
      case GL_UNSIGNED_INT_8_8_8_8_REV:
      case GL_UNSIGNED_BYTE:
         textureFormat = (MAPSURF_32BIT | MT_32BIT_ABGR8888);
         cpp = 4;
         break;
      default:
         return GL_FALSE;
      }
      break;
   case GL_BGR:
      switch (type) {
      case GL_UNSIGNED_SHORT_5_6_5_REV:
         textureFormat = (MAPSURF_16BIT | MT_16BIT_RGB565);
         cpp = 2;
         break;
      default:
         return GL_FALSE;
      }
      break;
   case GL_RGB:
      switch (type) {
      case GL_UNSIGNED_SHORT_5_6_5:
         textureFormat = (MAPSURF_16BIT | MT_16BIT_RGB565);
         cpp = 2;
         break;
      default:
         return GL_FALSE;
      }
      break;

   default:
      return GL_FALSE;
   }

   i830->meta.tex_buffer[0] = buffer;
   i830->meta.tex_offset[0] = offset;

   setup[I830_TEXREG_TM0LI] = (_3DSTATE_LOAD_STATE_IMMEDIATE_2 |
                               (LOAD_TEXTURE_MAP0 << 0) | 4);
   setup[I830_TEXREG_TM0S1] = (((height - 1) << TM0S1_HEIGHT_SHIFT) |
                               ((pitch - 1) << TM0S1_WIDTH_SHIFT) |
                               textureFormat);
   setup[I830_TEXREG_TM0S2] =
      (((((pitch * cpp) / 4) -
         1) << TM0S2_PITCH_SHIFT) | TM0S2_CUBE_FACE_ENA_MASK);

   setup[I830_TEXREG_TM0S3] =
      ((((numLevels -
          1) *
         4) << TM0S3_MIN_MIP_SHIFT) | (FILTER_NEAREST <<
                                       TM0S3_MIN_FILTER_SHIFT) |
       (MIPFILTER_NONE << TM0S3_MIP_FILTER_SHIFT) | (FILTER_NEAREST <<
                                                     TM0S3_MAG_FILTER_SHIFT));

   setup[I830_TEXREG_CUBE] = (_3DSTATE_MAP_CUBE | MAP_UNIT(0));

   setup[I830_TEXREG_MCS] = (_3DSTATE_MAP_COORD_SET_CMD |
                             MAP_UNIT(0) |
                             ENABLE_TEXCOORD_PARAMS |
                             TEXCOORDS_ARE_IN_TEXELUNITS |
                             TEXCOORDTYPE_CARTESIAN |
                             ENABLE_ADDR_V_CNTL |
                             TEXCOORD_ADDR_V_MODE(TEXCOORDMODE_WRAP) |
                             ENABLE_ADDR_U_CNTL |
                             TEXCOORD_ADDR_U_MODE(TEXCOORDMODE_WRAP));

   i830->meta.emitted &= ~I830_UPLOAD_TEX(0);
   return GL_TRUE;
}


static void
set_vertex_format(struct intel_context *intel)
{
   struct i830_context *i830 = i830_context(&intel->ctx);
   i830->meta.Ctx[I830_CTXREG_VF] = (_3DSTATE_VFT0_CMD |
                                     VFT0_TEX_COUNT(1) |
                                     VFT0_DIFFUSE | VFT0_XYZ);
   i830->meta.Ctx[I830_CTXREG_VF2] = (_3DSTATE_VFT1_CMD |
                                      VFT1_TEX0_FMT(TEXCOORDFMT_2D) |
                                      VFT1_TEX1_FMT(TEXCOORDFMT_2D) |
                                      VFT1_TEX2_FMT(TEXCOORDFMT_2D) |
                                      VFT1_TEX3_FMT(TEXCOORDFMT_2D));
   i830->meta.emitted &= ~I830_UPLOAD_CTX;
}


static void
meta_import_pixel_state(struct intel_context *intel)
{
   struct i830_context *i830 = i830_context(&intel->ctx);

   i830->meta.Ctx[I830_CTXREG_STATE1] = i830->state.Ctx[I830_CTXREG_STATE1];
   i830->meta.Ctx[I830_CTXREG_STATE2] = i830->state.Ctx[I830_CTXREG_STATE2];
   i830->meta.Ctx[I830_CTXREG_STATE3] = i830->state.Ctx[I830_CTXREG_STATE3];
   i830->meta.Ctx[I830_CTXREG_STATE4] = i830->state.Ctx[I830_CTXREG_STATE4];
   i830->meta.Ctx[I830_CTXREG_STATE5] = i830->state.Ctx[I830_CTXREG_STATE5];
   i830->meta.Ctx[I830_CTXREG_IALPHAB] = i830->state.Ctx[I830_CTXREG_IALPHAB];
   i830->meta.Ctx[I830_CTXREG_STENCILTST] =
      i830->state.Ctx[I830_CTXREG_STENCILTST];
   i830->meta.Ctx[I830_CTXREG_ENABLES_1] =
      i830->state.Ctx[I830_CTXREG_ENABLES_1];
   i830->meta.Ctx[I830_CTXREG_ENABLES_2] =
      i830->state.Ctx[I830_CTXREG_ENABLES_2];
   i830->meta.Ctx[I830_CTXREG_AA] = i830->state.Ctx[I830_CTXREG_AA];
   i830->meta.Ctx[I830_CTXREG_FOGCOLOR] =
      i830->state.Ctx[I830_CTXREG_FOGCOLOR];
   i830->meta.Ctx[I830_CTXREG_BLENDCOLOR0] =
      i830->state.Ctx[I830_CTXREG_BLENDCOLOR0];
   i830->meta.Ctx[I830_CTXREG_BLENDCOLOR1] =
      i830->state.Ctx[I830_CTXREG_BLENDCOLOR1];
   i830->meta.Ctx[I830_CTXREG_MCSB0] = i830->state.Ctx[I830_CTXREG_MCSB0];
   i830->meta.Ctx[I830_CTXREG_MCSB1] = i830->state.Ctx[I830_CTXREG_MCSB1];


   i830->meta.Ctx[I830_CTXREG_STATE3] &= ~CULLMODE_MASK;
   i830->meta.Stipple[I830_STPREG_ST1] &= ~ST1_ENABLE;
   i830->meta.emitted &= ~I830_UPLOAD_CTX;


   i830->meta.Buffer[I830_DESTREG_SENABLE] =
      i830->state.Buffer[I830_DESTREG_SENABLE];
   i830->meta.Buffer[I830_DESTREG_SR1] = i830->state.Buffer[I830_DESTREG_SR1];
   i830->meta.Buffer[I830_DESTREG_SR2] = i830->state.Buffer[I830_DESTREG_SR2];
   i830->meta.emitted &= ~I830_UPLOAD_BUFFERS;
}



/* Select between front and back draw buffers.
 */
static void
meta_draw_region(struct intel_context *intel,
                 struct intel_region *color_region,
                 struct intel_region *depth_region)
{
   struct i830_context *i830 = i830_context(&intel->ctx);

   i830_state_draw_region(intel, &i830->meta, color_region, depth_region);
}


/* Operations where the 3D engine is decoupled temporarily from the
 * current GL state and used for other purposes than simply rendering
 * incoming triangles.
 */
static void
install_meta_state(struct intel_context *intel)
{
   struct i830_context *i830 = i830_context(&intel->ctx);
   memcpy(&i830->meta, &i830->initial, sizeof(i830->meta));

   i830->meta.active = ACTIVE;
   i830->meta.emitted = 0;

   SET_STATE(i830, meta);
   set_vertex_format(intel);
   set_no_texture(intel);
}

static void
leave_meta_state(struct intel_context *intel)
{
   struct i830_context *i830 = i830_context(&intel->ctx);
   intel_region_release(&i830->meta.draw_region);
   intel_region_release(&i830->meta.depth_region);
/*    intel_region_release(intel, &i830->meta.tex_region[0]); */
   SET_STATE(i830, state);
}



void
i830InitMetaFuncs(struct i830_context *i830)
{
   i830->intel.vtbl.install_meta_state = install_meta_state;
   i830->intel.vtbl.leave_meta_state = leave_meta_state;
   i830->intel.vtbl.meta_no_depth_write = set_no_depth_write;
   i830->intel.vtbl.meta_no_stencil_write = set_no_stencil_write;
   i830->intel.vtbl.meta_stencil_replace = set_stencil_replace;
   i830->intel.vtbl.meta_depth_replace = set_depth_replace;
   i830->intel.vtbl.meta_color_mask = set_color_mask;
   i830->intel.vtbl.meta_no_texture = set_no_texture;
   i830->intel.vtbl.meta_texture_blend_replace = set_texture_blend_replace;
   i830->intel.vtbl.meta_tex_rect_source = set_tex_rect_source;
   i830->intel.vtbl.meta_draw_region = meta_draw_region;
   i830->intel.vtbl.meta_import_pixel_state = meta_import_pixel_state;
}