mesa: implement EXT_texture_shared_exponent

swrast support done.

There is no renderbuffer support in swrast, because it's not required
by the extension.

Reviewed-by: Brian Paul <[email protected]>

1 files changed, 49 insertions, 0 deletions

diff --git a/src/mesa/main/mipmap.c b/src/mesa/main/mipmap.c
index 0578631efb9..88cb5b53bf7 100644
--- a/src/mesa/main/mipmap.c
+++ b/src/mesa/main/mipmap.c
@@ -34,6 +34,8 @@
 #include "teximage.h"
 #include "texstore.h"
 #include "image.h"
+#include "macros.h"
+#include "rgb9e5.h"
 
 
 
@@ -665,6 +667,25 @@ do_row(GLenum datatype, GLuint comps, GLint srcWidth,
       }
    }
 
+   else if (datatype == GL_UNSIGNED_INT_5_9_9_9_REV && comps == 3) {
+      GLuint i, j, k;
+      const GLuint *rowA = (const GLuint*) srcRowA;
+      const GLuint *rowB = (const GLuint*) srcRowB;
+      GLuint *dst = (GLuint*)dstRow;
+      GLfloat res[3], rowAj[3], rowBj[3], rowAk[3], rowBk[3];
+      for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+           i++, j += colStride, k += colStride) {
+         rgb9e5_to_float3(rowA[j], rowAj);
+         rgb9e5_to_float3(rowB[j], rowBj);
+         rgb9e5_to_float3(rowA[k], rowAk);
+         rgb9e5_to_float3(rowB[k], rowBk);
+         res[0] = (rowAj[0] + rowAk[0] + rowBj[0] + rowBk[0]) * 0.25F;
+         res[1] = (rowAj[1] + rowAk[1] + rowBj[1] + rowBk[1]) * 0.25F;
+         res[2] = (rowAj[2] + rowAk[2] + rowBj[2] + rowBk[2]) * 0.25F;
+         dst[i] = float3_to_rgb9e5(res);
+      }
+   }
+
    else {
       _mesa_problem(NULL, "bad format in do_row()");
    }
@@ -1245,6 +1266,34 @@ do_row_3D(GLenum datatype, GLuint comps, GLint srcWidth,
          dst[i] = (a << 30) | (b << 20) | (g << 10) | r;
       }
    }
+
+   else if (datatype == GL_UNSIGNED_INT_5_9_9_9_REV && comps == 3) {
+      DECLARE_ROW_POINTERS0(GLuint);
+
+      GLfloat res[3];
+      GLfloat rowAj[3], rowBj[3], rowCj[3], rowDj[3];
+      GLfloat rowAk[3], rowBk[3], rowCk[3], rowDk[3];
+
+      for (i = j = 0, k = k0; i < (GLuint) dstWidth;
+           i++, j += colStride, k += colStride) {
+         rgb9e5_to_float3(rowA[j], rowAj);
+         rgb9e5_to_float3(rowB[j], rowBj);
+         rgb9e5_to_float3(rowC[j], rowCj);
+         rgb9e5_to_float3(rowD[j], rowDj);
+         rgb9e5_to_float3(rowA[k], rowAk);
+         rgb9e5_to_float3(rowB[k], rowBk);
+         rgb9e5_to_float3(rowC[k], rowCk);
+         rgb9e5_to_float3(rowD[k], rowDk);
+         res[0] = (rowAj[0] + rowAk[0] + rowBj[0] + rowBk[0] +
+                   rowCj[0] + rowCk[0] + rowDj[0] + rowDk[0]) * 0.125F;
+         res[1] = (rowAj[1] + rowAk[1] + rowBj[1] + rowBk[1] +
+                   rowCj[1] + rowCk[1] + rowDj[1] + rowDk[1]) * 0.125F;
+         res[2] = (rowAj[2] + rowAk[2] + rowBj[2] + rowBk[2] +
+                   rowCj[2] + rowCk[2] + rowDj[2] + rowDk[2]) * 0.125F;
+         dst[i] = float3_to_rgb9e5(res);
+      }
+   }
+
    else {
       _mesa_problem(NULL, "bad format in do_row()");
    }