i915_metaops.c

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

static void
meta_no_texture(struct intel_context *intel)
{
   struct i915_context *i915 = i915_context(&intel->ctx);

   static const GLuint prog[] = {
      _3DSTATE_PIXEL_SHADER_PROGRAM,

      /* Declare incoming diffuse color:
       */
      (D0_DCL | D0_DECL_REG(REG_T_DIFFUSE) | D0_CHANNEL_ALL),
      D1_MBZ,
      D2_MBZ,

      /* output-color = mov(t_diffuse)
       */
      (A0_MOV |
       A0_DEST_REG(REG_OC) |
       A0_DEST_CHANNEL_ALL | A0_SRC0_REG(REG_T_DIFFUSE)),
      (A1_SRC0_XYZW),
      0,
   };


   memcpy(i915->meta.Program, prog, sizeof(prog));
   i915->meta.ProgramSize = sizeof(prog) / sizeof(*prog);
   i915->meta.Program[0] |= i915->meta.ProgramSize - 2;
   i915->meta.emitted &= ~I915_UPLOAD_PROGRAM;
}

static void
meta_texture_blend_replace(struct intel_context *intel)
{
   struct i915_context *i915 = i915_context(&intel->ctx);

   static const GLuint prog[] = {
      _3DSTATE_PIXEL_SHADER_PROGRAM,

      /* Declare the sampler:
       */
      (D0_DCL | D0_DECL_REG(REG_S(0)) | D0_SAMPLE_TYPE_2D | D0_CHANNEL_NONE),
      D1_MBZ,
      D2_MBZ,

      /* Declare the interpolated texture coordinate:
       */
      (D0_DCL | D0_DECL_REG(REG_T_TEX(0)) | D0_CHANNEL_ALL),
      D1_MBZ,
      D2_MBZ,

      /* output-color = texld(sample0, texcoord0) 
       */
      (T0_TEXLD | T0_DEST_REG(REG_OC) | T0_SAMPLER(0)),
      T1_ADDRESS_REG(REG_TYPE_T, 0),
      T2_MBZ
   };

   memcpy(i915->meta.Program, prog, sizeof(prog));
   i915->meta.ProgramSize = sizeof(prog) / sizeof(*prog);
   i915->meta.Program[0] |= i915->meta.ProgramSize - 2;
   i915->meta.emitted &= ~I915_UPLOAD_PROGRAM;
}





/* Set up an arbitary piece of memory as a rectangular texture
 * (including the front or back buffer).
 */
static GLboolean
meta_tex_rect_source(struct intel_context *intel,
                     dri_bo *buffer,
                     GLuint offset,
                     GLuint pitch, GLuint height, GLenum format, GLenum type)
{
   struct i915_context *i915 = i915_context(&intel->ctx);
   GLuint unit = 0;
   GLint numLevels = 1;
   GLuint *state = i915->meta.Tex[0];
   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;
   }


   if ((pitch * cpp) & 3) {
      _mesa_printf("%s: texture is not dword pitch\n", __FUNCTION__);
      return GL_FALSE;
   }

/*    intel_region_release(&i915->meta.tex_region[0]); */
/*    intel_region_reference(&i915->meta.tex_region[0], region); */
   i915->meta.tex_buffer[0] = buffer;
   i915->meta.tex_offset[0] = offset;

   state[I915_TEXREG_MS3] = (((height - 1) << MS3_HEIGHT_SHIFT) |
                             ((pitch - 1) << MS3_WIDTH_SHIFT) |
                             textureFormat | MS3_USE_FENCE_REGS);

   state[I915_TEXREG_MS4] = (((((pitch * cpp) / 4) - 1) << MS4_PITCH_SHIFT) |
                             MS4_CUBE_FACE_ENA_MASK |
                             ((((numLevels - 1) * 4)) << MS4_MAX_LOD_SHIFT));

   state[I915_TEXREG_SS2] = ((FILTER_NEAREST << SS2_MIN_FILTER_SHIFT) |
                             (MIPFILTER_NONE << SS2_MIP_FILTER_SHIFT) |
                             (FILTER_NEAREST << SS2_MAG_FILTER_SHIFT));

   state[I915_TEXREG_SS3] = ((TEXCOORDMODE_WRAP << SS3_TCX_ADDR_MODE_SHIFT) |
                             (TEXCOORDMODE_WRAP << SS3_TCY_ADDR_MODE_SHIFT) |
                             (TEXCOORDMODE_WRAP << SS3_TCZ_ADDR_MODE_SHIFT) |
                             (unit << SS3_TEXTUREMAP_INDEX_SHIFT));

   state[I915_TEXREG_SS4] = 0;

   i915->meta.emitted &= ~I915_UPLOAD_TEX(0);
   return GL_TRUE;
}


/**
 * Set the color and depth drawing region for meta ops.
 */
static void
meta_draw_region(struct intel_context *intel,
                 struct intel_region *color_region,
                 struct intel_region *depth_region)
{
   struct i915_context *i915 = i915_context(&intel->ctx);
   i915_state_draw_region(intel, &i915->meta, color_region, depth_region);
}


static void
set_vertex_format(struct intel_context *intel)
{
   struct i915_context *i915 = i915_context(&intel->ctx);

   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_XYZ);

   i915->meta.emitted &= ~I915_UPLOAD_CTX;
}



/* 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 i915_context *i915 = i915_context(&intel->ctx);
   memcpy(&i915->meta, &i915->initial, sizeof(i915->meta));
   i915->meta.active = ACTIVE;
   i915->meta.emitted = 0;

   SET_STATE(i915, meta);
   set_vertex_format(intel);
   meta_no_texture(intel);
}

static void
leave_meta_state(struct intel_context *intel)
{
   struct i915_context *i915 = i915_context(&intel->ctx);
   intel_region_release(&i915->meta.draw_region);
   intel_region_release(&i915->meta.depth_region);
/*    intel_region_release(&i915->meta.tex_region[0]); */
   SET_STATE(i915, state);
}



void
i915InitMetaFuncs(struct i915_context *i915)
{
   i915->intel.vtbl.install_meta_state = install_meta_state;
   i915->intel.vtbl.leave_meta_state = leave_meta_state;
   i915->intel.vtbl.meta_no_depth_write = meta_no_depth_write;
   i915->intel.vtbl.meta_no_stencil_write = meta_no_stencil_write;
   i915->intel.vtbl.meta_stencil_replace = meta_stencil_replace;
   i915->intel.vtbl.meta_depth_replace = meta_depth_replace;
   i915->intel.vtbl.meta_color_mask = meta_color_mask;
   i915->intel.vtbl.meta_no_texture = meta_no_texture;
   i915->intel.vtbl.meta_texture_blend_replace = meta_texture_blend_replace;
   i915->intel.vtbl.meta_tex_rect_source = meta_tex_rect_source;
   i915->intel.vtbl.meta_draw_region = meta_draw_region;
   i915->intel.vtbl.meta_import_pixel_state = meta_import_pixel_state;
}