src/mesa/drivers/dri/i915tex/i915_tex.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "glheader.h"
  29 #include "mtypes.h"
  30 #include "imports.h"
  31 #include "simple_list.h"
  32 #include "enums.h"
  33 #include "image.h"
  34 #include "texstore.h"
  35 #include "texformat.h"
  36 #include "texmem.h"
  37 #include "swrast/swrast.h"
  38
  39 #include "mm.h"
  40
  41 #include "intel_ioctl.h"
  42
  43 #include "i915_context.h"
  44 #include "i915_reg.h"
  45
  46
  47
  48 static void
  49 i915TexEnv(GLcontext * ctx, GLenum target,
  50            GLenum pname, const GLfloat * param)
  51 {
  52    struct i915_context *i915 = I915_CONTEXT(ctx);
  53
  54    switch (pname) {
  55    case GL_TEXTURE_LOD_BIAS:{
  56          GLuint unit = ctx->Texture.CurrentUnit;
  57          GLint b = (int) ((*param) * 16.0);
  58          if (b > 255)
  59             b = 255;
  60          if (b < -256)
  61             b = -256;
  62          I915_STATECHANGE(i915, I915_UPLOAD_TEX(unit));
  63          i915->lodbias_ss2[unit] =
  64             ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
  65          break;
  66       }
  67
  68    default:
  69       break;
  70    }
  71 }
  72
  73
  74 void
  75 i915InitTextureFuncs(struct dd_function_table *functions)
  76 {
  77    functions->TexEnv = i915TexEnv;
  78 }