From 837ad2dc384096d936fd65e30374129f36e09335 Mon Sep 17 00:00:00 2001
From: Gustaw Smolarczyk <wielkiegie@gmail.com>
Date: Thu, 30 Mar 2017 20:09:30 +0200
Subject: mesa/main: Maintain compressed TexEnv Combine state.
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Signed-off-by: Gustaw Smolarczyk <wielkiegie@gmail.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
---
 src/mesa/main/texstate.c | 103 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)

(limited to 'src/mesa/main/texstate.c')

diff --git a/src/mesa/main/texstate.c b/src/mesa/main/texstate.c
index aa99b0667cb..830b230b5d7 100644
--- a/src/mesa/main/texstate.c
+++ b/src/mesa/main/texstate.c
@@ -375,6 +375,107 @@ _mesa_update_texture_matrices(struct gl_context *ctx)
 }
 
 
+/**
+ * Translate GL combiner state into a MODE_x value
+ */
+static uint32_t
+tex_combine_translate_mode(GLenum envMode, GLenum mode)
+{
+   switch (mode) {
+   case GL_REPLACE: return TEXENV_MODE_REPLACE;
+   case GL_MODULATE: return TEXENV_MODE_MODULATE;
+   case GL_ADD:
+      if (envMode == GL_COMBINE4_NV)
+	 return TEXENV_MODE_ADD_PRODUCTS_NV;
+      else
+	 return TEXENV_MODE_ADD;
+   case GL_ADD_SIGNED:
+      if (envMode == GL_COMBINE4_NV)
+	 return TEXENV_MODE_ADD_PRODUCTS_SIGNED_NV;
+      else
+	 return TEXENV_MODE_ADD_SIGNED;
+   case GL_INTERPOLATE: return TEXENV_MODE_INTERPOLATE;
+   case GL_SUBTRACT: return TEXENV_MODE_SUBTRACT;
+   case GL_DOT3_RGB: return TEXENV_MODE_DOT3_RGB;
+   case GL_DOT3_RGB_EXT: return TEXENV_MODE_DOT3_RGB_EXT;
+   case GL_DOT3_RGBA: return TEXENV_MODE_DOT3_RGBA;
+   case GL_DOT3_RGBA_EXT: return TEXENV_MODE_DOT3_RGBA_EXT;
+   case GL_MODULATE_ADD_ATI: return TEXENV_MODE_MODULATE_ADD_ATI;
+   case GL_MODULATE_SIGNED_ADD_ATI: return TEXENV_MODE_MODULATE_SIGNED_ADD_ATI;
+   case GL_MODULATE_SUBTRACT_ATI: return TEXENV_MODE_MODULATE_SUBTRACT_ATI;
+   default:
+      unreachable("Invalid TexEnv Combine mode");
+   }
+}
+
+
+static uint8_t
+tex_combine_translate_source(GLenum src)
+{
+   switch (src) {
+   case GL_TEXTURE0:
+   case GL_TEXTURE1:
+   case GL_TEXTURE2:
+   case GL_TEXTURE3:
+   case GL_TEXTURE4:
+   case GL_TEXTURE5:
+   case GL_TEXTURE6:
+   case GL_TEXTURE7: return TEXENV_SRC_TEXTURE0 + (src - GL_TEXTURE0);
+   case GL_TEXTURE: return TEXENV_SRC_TEXTURE;
+   case GL_PREVIOUS: return TEXENV_SRC_PREVIOUS;
+   case GL_PRIMARY_COLOR: return TEXENV_SRC_PRIMARY_COLOR;
+   case GL_CONSTANT: return TEXENV_SRC_CONSTANT;
+   case GL_ZERO: return TEXENV_SRC_ZERO;
+   case GL_ONE: return TEXENV_SRC_ONE;
+   default:
+      unreachable("Invalid TexEnv Combine argument source");
+   }
+}
+
+
+static uint8_t
+tex_combine_translate_operand(GLenum operand)
+{
+   switch (operand) {
+   case GL_SRC_COLOR: return TEXENV_OPR_COLOR;
+   case GL_ONE_MINUS_SRC_COLOR: return TEXENV_OPR_ONE_MINUS_COLOR;
+   case GL_SRC_ALPHA: return TEXENV_OPR_ALPHA;
+   case GL_ONE_MINUS_SRC_ALPHA: return TEXENV_OPR_ONE_MINUS_ALPHA;
+   default:
+      unreachable("Invalid TexEnv Combine argument source");
+   }
+}
+
+
+static void
+pack_tex_combine(struct gl_texture_unit *texUnit)
+{
+   struct gl_tex_env_combine_state *state = texUnit->_CurrentCombine;
+   struct gl_tex_env_combine_packed *packed = &texUnit->_CurrentCombinePacked;
+
+   memset(packed, 0, sizeof *packed);
+
+   packed->ModeRGB = tex_combine_translate_mode(texUnit->EnvMode, state->ModeRGB);
+   packed->ModeA = tex_combine_translate_mode(texUnit->EnvMode, state->ModeA);
+   packed->ScaleShiftRGB = state->ScaleShiftRGB;
+   packed->ScaleShiftA = state->ScaleShiftA;
+   packed->NumArgsRGB = state->_NumArgsRGB;
+   packed->NumArgsA = state->_NumArgsA;
+
+   for (int i = 0; i < state->_NumArgsRGB; ++i)
+   {
+      packed->ArgsRGB[i].Source = tex_combine_translate_source(state->SourceRGB[i]);
+      packed->ArgsRGB[i].Operand = tex_combine_translate_operand(state->OperandRGB[i]);
+   }
+
+   for (int i = 0; i < state->_NumArgsA; ++i)
+   {
+      packed->ArgsA[i].Source = tex_combine_translate_source(state->SourceA[i]);
+      packed->ArgsA[i].Operand = tex_combine_translate_operand(state->OperandA[i]);
+   }
+}
+
+
 /**
  * Examine texture unit's combine/env state to update derived state.
  */
@@ -467,6 +568,8 @@ update_tex_combine(struct gl_context *ctx, struct gl_texture_unit *texUnit)
       _mesa_problem(ctx, "invalid Alpha combine mode in update_texture_state");
       break;
    }
+
+   pack_tex_combine(texUnit);
 }
 
 static void
-- 
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