Move i915tex driver into place as just i915.

1 files changed, 463 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i915/i830_texblend.c b/src/mesa/drivers/dri/i915/i830_texblend.c
new file mode 100644
index 00000000000..58f220eb7ce
--- /dev/null
+++ b/src/mesa/drivers/dri/i915/i830_texblend.c
@@ -0,0 +1,463 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+#include "glheader.h"
+#include "macros.h"
+#include "mtypes.h"
+#include "simple_list.h"
+#include "enums.h"
+#include "texformat.h"
+#include "texstore.h"
+
+#include "mm.h"
+
+#include "intel_screen.h"
+#include "intel_ioctl.h"
+#include "intel_tex.h"
+
+#include "i830_context.h"
+#include "i830_reg.h"
+
+
+/* ================================================================
+ * Texture combine functions
+ */
+static GLuint
+pass_through(GLuint * state, GLuint blendUnit)
+{
+   state[0] = (_3DSTATE_MAP_BLEND_OP_CMD(blendUnit) |
+               TEXPIPE_COLOR |
+               ENABLE_TEXOUTPUT_WRT_SEL |
+               TEXOP_OUTPUT_CURRENT |
+               DISABLE_TEX_CNTRL_STAGE |
+               TEXOP_SCALE_1X | TEXOP_MODIFY_PARMS | TEXBLENDOP_ARG1);
+   state[1] = (_3DSTATE_MAP_BLEND_OP_CMD(blendUnit) |
+               TEXPIPE_ALPHA |
+               ENABLE_TEXOUTPUT_WRT_SEL |
+               TEXOP_OUTPUT_CURRENT |
+               TEXOP_SCALE_1X | TEXOP_MODIFY_PARMS | TEXBLENDOP_ARG1);
+   state[2] = (_3DSTATE_MAP_BLEND_ARG_CMD(blendUnit) |
+               TEXPIPE_COLOR |
+               TEXBLEND_ARG1 |
+               TEXBLENDARG_MODIFY_PARMS | TEXBLENDARG_CURRENT);
+   state[3] = (_3DSTATE_MAP_BLEND_ARG_CMD(blendUnit) |
+               TEXPIPE_ALPHA |
+               TEXBLEND_ARG1 |
+               TEXBLENDARG_MODIFY_PARMS | TEXBLENDARG_CURRENT);
+
+   return 4;
+}
+
+static GLuint
+emit_factor(GLuint blendUnit, GLuint * state, GLuint count,
+            const GLfloat * factor)
+{
+   GLubyte r, g, b, a;
+   GLuint col;
+
+   if (0)
+      fprintf(stderr, "emit constant %d: %.2f %.2f %.2f %.2f\n",
+              blendUnit, factor[0], factor[1], factor[2], factor[3]);
+
+   UNCLAMPED_FLOAT_TO_UBYTE(r, factor[0]);
+   UNCLAMPED_FLOAT_TO_UBYTE(g, factor[1]);
+   UNCLAMPED_FLOAT_TO_UBYTE(b, factor[2]);
+   UNCLAMPED_FLOAT_TO_UBYTE(a, factor[3]);
+
+   col = ((a << 24) | (r << 16) | (g << 8) | b);
+
+   state[count++] = _3DSTATE_COLOR_FACTOR_N_CMD(blendUnit);
+   state[count++] = col;
+
+   return count;
+}
+
+
+static INLINE GLuint
+GetTexelOp(GLint unit)
+{
+   switch (unit) {
+   case 0:
+      return TEXBLENDARG_TEXEL0;
+   case 1:
+      return TEXBLENDARG_TEXEL1;
+   case 2:
+      return TEXBLENDARG_TEXEL2;
+   case 3:
+      return TEXBLENDARG_TEXEL3;
+   default:
+      return TEXBLENDARG_TEXEL0;
+   }
+}
+
+
+/**
+ * Calculate the hardware instuctions to setup the current texture enviromnemt
+ * settings.  Since \c gl_texture_unit::_CurrentCombine is used, both
+ * "classic" texture enviroments and GL_ARB_texture_env_combine type texture
+ * environments are treated identically.
+ *
+ * \todo
+ * This function should return \c GLboolean.  When \c GL_FALSE is returned,
+ * it means that an environment is selected that the hardware cannot do.  This
+ * is the way the Radeon and R200 drivers work.
+ * 
+ * \todo
+ * Looking at i830_3d_regs.h, it seems the i830 can do part of
+ * GL_ATI_texture_env_combine3.  It can handle using \c GL_ONE and
+ * \c GL_ZERO as combine inputs (which the code already supports).  It can
+ * also handle the \c GL_MODULATE_ADD_ATI mode.  Is it worth investigating
+ * partial support for the extension?
+ */
+GLuint
+i830SetTexEnvCombine(struct i830_context * i830,
+                     const struct gl_tex_env_combine_state * combine,
+                     GLint blendUnit,
+                     GLuint texel_op, GLuint * state, const GLfloat * factor)
+{
+   const GLuint numColorArgs = combine->_NumArgsRGB;
+   const GLuint numAlphaArgs = combine->_NumArgsA;
+
+   GLuint blendop;
+   GLuint ablendop;
+   GLuint args_RGB[3];
+   GLuint args_A[3];
+   GLuint rgb_shift;
+   GLuint alpha_shift;
+   GLboolean need_factor = 0;
+   int i;
+   unsigned used;
+   static const GLuint tex_blend_rgb[3] = {
+      TEXPIPE_COLOR | TEXBLEND_ARG1 | TEXBLENDARG_MODIFY_PARMS,
+      TEXPIPE_COLOR | TEXBLEND_ARG2 | TEXBLENDARG_MODIFY_PARMS,
+      TEXPIPE_COLOR | TEXBLEND_ARG0 | TEXBLENDARG_MODIFY_PARMS,
+   };
+   static const GLuint tex_blend_a[3] = {
+      TEXPIPE_ALPHA | TEXBLEND_ARG1 | TEXBLENDARG_MODIFY_PARMS,
+      TEXPIPE_ALPHA | TEXBLEND_ARG2 | TEXBLENDARG_MODIFY_PARMS,
+      TEXPIPE_ALPHA | TEXBLEND_ARG0 | TEXBLENDARG_MODIFY_PARMS,
+   };
+
+   if (INTEL_DEBUG & DEBUG_TEXTURE)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+
+   /* The EXT version of the DOT3 extension does not support the
+    * scale factor, but the ARB version (and the version in OpenGL
+    * 1.3) does.
+    */
+   switch (combine->ModeRGB) {
+   case GL_DOT3_RGB_EXT:
+      alpha_shift = combine->ScaleShiftA;
+      rgb_shift = 0;
+      break;
+
+   case GL_DOT3_RGBA_EXT:
+      alpha_shift = 0;
+      rgb_shift = 0;
+      break;
+
+   default:
+      rgb_shift = combine->ScaleShiftRGB;
+      alpha_shift = combine->ScaleShiftA;
+      break;
+   }
+
+
+   switch (combine->ModeRGB) {
+   case GL_REPLACE:
+      blendop = TEXBLENDOP_ARG1;
+      break;
+   case GL_MODULATE:
+      blendop = TEXBLENDOP_MODULATE;
+      break;
+   case GL_ADD:
+      blendop = TEXBLENDOP_ADD;
+      break;
+   case GL_ADD_SIGNED:
+      blendop = TEXBLENDOP_ADDSIGNED;
+      break;
+   case GL_INTERPOLATE:
+      blendop = TEXBLENDOP_BLEND;
+      break;
+   case GL_SUBTRACT:
+      blendop = TEXBLENDOP_SUBTRACT;
+      break;
+   case GL_DOT3_RGB_EXT:
+   case GL_DOT3_RGB:
+      blendop = TEXBLENDOP_DOT3;
+      break;
+   case GL_DOT3_RGBA_EXT:
+   case GL_DOT3_RGBA:
+      blendop = TEXBLENDOP_DOT3;
+      break;
+   default:
+      return pass_through(state, blendUnit);
+   }
+
+   blendop |= (rgb_shift << TEXOP_SCALE_SHIFT);
+
+
+   /* Handle RGB args */
+   for (i = 0; i < 3; i++) {
+      switch (combine->SourceRGB[i]) {
+      case GL_TEXTURE:
+         args_RGB[i] = texel_op;
+         break;
+      case GL_TEXTURE0:
+      case GL_TEXTURE1:
+      case GL_TEXTURE2:
+      case GL_TEXTURE3:
+         args_RGB[i] = GetTexelOp(combine->SourceRGB[i] - GL_TEXTURE0);
+         break;
+      case GL_CONSTANT:
+         args_RGB[i] = TEXBLENDARG_FACTOR_N;
+         need_factor = 1;
+         break;
+      case GL_PRIMARY_COLOR:
+         args_RGB[i] = TEXBLENDARG_DIFFUSE;
+         break;
+      case GL_PREVIOUS:
+         args_RGB[i] = TEXBLENDARG_CURRENT;
+         break;
+      default:
+         return pass_through(state, blendUnit);
+      }
+
+      switch (combine->OperandRGB[i]) {
+      case GL_SRC_COLOR:
+         args_RGB[i] |= 0;
+         break;
+      case GL_ONE_MINUS_SRC_COLOR:
+         args_RGB[i] |= TEXBLENDARG_INV_ARG;
+         break;
+      case GL_SRC_ALPHA:
+         args_RGB[i] |= TEXBLENDARG_REPLICATE_ALPHA;
+         break;
+      case GL_ONE_MINUS_SRC_ALPHA:
+         args_RGB[i] |= (TEXBLENDARG_REPLICATE_ALPHA | TEXBLENDARG_INV_ARG);
+         break;
+      default:
+         return pass_through(state, blendUnit);
+      }
+   }
+
+
+   /* Need to knobble the alpha calculations of TEXBLENDOP_DOT4 to
+    * match the spec.  Can't use DOT3 as it won't propogate values
+    * into alpha as required:
+    *
+    * Note - the global factor is set up with alpha == .5, so 
+    * the alpha part of the DOT4 calculation should be zero.
+    */
+   if (combine->ModeRGB == GL_DOT3_RGBA_EXT ||
+       combine->ModeRGB == GL_DOT3_RGBA) {
+      ablendop = TEXBLENDOP_DOT4;
+      args_A[0] = TEXBLENDARG_FACTOR;   /* the global factor */
+      args_A[1] = TEXBLENDARG_FACTOR;
+      args_A[2] = TEXBLENDARG_FACTOR;
+   }
+   else {
+      switch (combine->ModeA) {
+      case GL_REPLACE:
+         ablendop = TEXBLENDOP_ARG1;
+         break;
+      case GL_MODULATE:
+         ablendop = TEXBLENDOP_MODULATE;
+         break;
+      case GL_ADD:
+         ablendop = TEXBLENDOP_ADD;
+         break;
+      case GL_ADD_SIGNED:
+         ablendop = TEXBLENDOP_ADDSIGNED;
+         break;
+      case GL_INTERPOLATE:
+         ablendop = TEXBLENDOP_BLEND;
+         break;
+      case GL_SUBTRACT:
+         ablendop = TEXBLENDOP_SUBTRACT;
+         break;
+      default:
+         return pass_through(state, blendUnit);
+      }
+
+
+      ablendop |= (alpha_shift << TEXOP_SCALE_SHIFT);
+
+      /* Handle A args */
+      for (i = 0; i < 3; i++) {
+         switch (combine->SourceA[i]) {
+         case GL_TEXTURE:
+            args_A[i] = texel_op;
+            break;
+         case GL_TEXTURE0:
+         case GL_TEXTURE1:
+         case GL_TEXTURE2:
+         case GL_TEXTURE3:
+            args_A[i] = GetTexelOp(combine->SourceA[i] - GL_TEXTURE0);
+            break;
+         case GL_CONSTANT:
+            args_A[i] = TEXBLENDARG_FACTOR_N;
+            need_factor = 1;
+            break;
+         case GL_PRIMARY_COLOR:
+            args_A[i] = TEXBLENDARG_DIFFUSE;
+            break;
+         case GL_PREVIOUS:
+            args_A[i] = TEXBLENDARG_CURRENT;
+            break;
+         default:
+            return pass_through(state, blendUnit);
+         }
+
+         switch (combine->OperandA[i]) {
+         case GL_SRC_ALPHA:
+            args_A[i] |= 0;
+            break;
+         case GL_ONE_MINUS_SRC_ALPHA:
+            args_A[i] |= TEXBLENDARG_INV_ARG;
+            break;
+         default:
+            return pass_through(state, blendUnit);
+         }
+      }
+   }
+
+
+
+   /* Native Arg1 == Arg0 in GL_EXT_texture_env_combine spec */
+   /* Native Arg2 == Arg1 in GL_EXT_texture_env_combine spec */
+   /* Native Arg0 == Arg2 in GL_EXT_texture_env_combine spec */
+
+   /* When we render we need to figure out which is the last really enabled
+    * tex unit, and put last stage on it
+    */
+
+
+   /* Build color & alpha pipelines */
+
+   used = 0;
+   state[used++] = (_3DSTATE_MAP_BLEND_OP_CMD(blendUnit) |
+                    TEXPIPE_COLOR |
+                    ENABLE_TEXOUTPUT_WRT_SEL |
+                    TEXOP_OUTPUT_CURRENT |
+                    DISABLE_TEX_CNTRL_STAGE | TEXOP_MODIFY_PARMS | blendop);
+   state[used++] = (_3DSTATE_MAP_BLEND_OP_CMD(blendUnit) |
+                    TEXPIPE_ALPHA |
+                    ENABLE_TEXOUTPUT_WRT_SEL |
+                    TEXOP_OUTPUT_CURRENT | TEXOP_MODIFY_PARMS | ablendop);
+
+   for (i = 0; i < numColorArgs; i++) {
+      state[used++] = (_3DSTATE_MAP_BLEND_ARG_CMD(blendUnit) |
+                       tex_blend_rgb[i] | args_RGB[i]);
+   }
+
+   for (i = 0; i < numAlphaArgs; i++) {
+      state[used++] = (_3DSTATE_MAP_BLEND_ARG_CMD(blendUnit) |
+                       tex_blend_a[i] | args_A[i]);
+   }
+
+
+   if (need_factor)
+      return emit_factor(blendUnit, state, used, factor);
+   else
+      return used;
+}
+
+
+static void
+emit_texblend(struct i830_context *i830, GLuint unit, GLuint blendUnit,
+              GLboolean last_stage)
+{
+   struct gl_texture_unit *texUnit = &i830->intel.ctx.Texture.Unit[unit];
+   GLuint tmp[I830_TEXBLEND_SIZE], tmp_sz;
+
+
+   if (0)
+      fprintf(stderr, "%s unit %d\n", __FUNCTION__, unit);
+
+   /* Update i830->state.TexBlend
+    */
+   tmp_sz = i830SetTexEnvCombine(i830, texUnit->_CurrentCombine, blendUnit,
+                                 GetTexelOp(unit), tmp, texUnit->EnvColor);
+
+   if (last_stage)
+      tmp[0] |= TEXOP_LAST_STAGE;
+
+   if (tmp_sz != i830->state.TexBlendWordsUsed[blendUnit] ||
+       memcmp(tmp, i830->state.TexBlend[blendUnit],
+              tmp_sz * sizeof(GLuint))) {
+
+      I830_STATECHANGE(i830, I830_UPLOAD_TEXBLEND(blendUnit));
+      memcpy(i830->state.TexBlend[blendUnit], tmp, tmp_sz * sizeof(GLuint));
+      i830->state.TexBlendWordsUsed[blendUnit] = tmp_sz;
+   }
+
+   I830_ACTIVESTATE(i830, I830_UPLOAD_TEXBLEND(blendUnit), GL_TRUE);
+}
+
+static void
+emit_passthrough(struct i830_context *i830)
+{
+   GLuint tmp[I830_TEXBLEND_SIZE], tmp_sz;
+   GLuint unit = 0;
+
+   tmp_sz = pass_through(tmp, unit);
+   tmp[0] |= TEXOP_LAST_STAGE;
+
+   if (tmp_sz != i830->state.TexBlendWordsUsed[unit] ||
+       memcmp(tmp, i830->state.TexBlend[unit], tmp_sz * sizeof(GLuint))) {
+
+      I830_STATECHANGE(i830, I830_UPLOAD_TEXBLEND(unit));
+      memcpy(i830->state.TexBlend[unit], tmp, tmp_sz * sizeof(GLuint));
+      i830->state.TexBlendWordsUsed[unit] = tmp_sz;
+   }
+
+   I830_ACTIVESTATE(i830, I830_UPLOAD_TEXBLEND(unit), GL_TRUE);
+}
+
+void
+i830EmitTextureBlend(struct i830_context *i830)
+{
+   GLcontext *ctx = &i830->intel.ctx;
+   GLuint unit, last_stage = 0, blendunit = 0;
+
+   I830_ACTIVESTATE(i830, I830_UPLOAD_TEXBLEND_ALL, GL_FALSE);
+
+   if (ctx->Texture._EnabledUnits) {
+      for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++)
+         if (ctx->Texture.Unit[unit]._ReallyEnabled)
+            last_stage = unit;
+
+      for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++)
+         if (ctx->Texture.Unit[unit]._ReallyEnabled)
+            emit_texblend(i830, unit, blendunit++, last_stage == unit);
+   }
+   else {
+      emit_passthrough(i830);
+   }
+}