commit 0a337e93bf945dc76d8d4f77912ea00e25986bb3
author daniel@transgaming.com <daniel@transgaming.com@736b8ea6-26fd-11df-bfd4-992fa37f6226> Sat Aug 28 17:38:27 2010 +0000
committer daniel@transgaming.com <daniel@transgaming.com@736b8ea6-26fd-11df-bfd4-992fa37f6226> Sat Aug 28 17:38:27 2010 +0000
tree 85024dc2473aafa6034d0aac2e798245f6695738
parent 06098890abb48bf02b1fc77c67ed373ce2268151

Implement support for floating point textures.
Trac #12909

Implements GL_OES_texture_float, GL_OES_texture_half_float,
GL_OES_texture_float_linear, and GL_OES_texture_half_float_linear
when supported by the hardware.

Signed-off-by: Nicolas Capens
Signed-off-by: Daniel Koch

Author:    Shannon Woods <shannon.woods@transgaming.com>

git-svn-id: https://angleproject.googlecode.com/svn/trunk@404 736b8ea6-26fd-11df-bfd4-992fa37f6226

src/libGLESv2/utilities.cpp

diff --git a/src/libGLESv2/utilities.cpp b/src/libGLESv2/utilities.cpp
index 7fc2bc4..991361c 100644
--- a/src/libGLESv2/utilities.cpp
+++ b/src/libGLESv2/utilities.cpp
@@ -247,6 +247,28 @@
       case GL_UNSIGNED_SHORT_5_5_5_1:
       case GL_UNSIGNED_SHORT_5_6_5:
         return sizeof(unsigned short);
+      case GL_FLOAT:
+        switch (format)
+        {
+          case GL_ALPHA:           return sizeof(float);
+          case GL_LUMINANCE:       return sizeof(float);
+          case GL_LUMINANCE_ALPHA: return sizeof(float) * 2;
+          case GL_RGB:             return sizeof(float) * 3;
+          case GL_RGBA:            return sizeof(float) * 4;
+          default: UNREACHABLE();
+        }
+        break;
+      case GL_HALF_FLOAT_OES:
+        switch (format)
+        {
+          case GL_ALPHA:           return sizeof(unsigned short);
+          case GL_LUMINANCE:       return sizeof(unsigned short);
+          case GL_LUMINANCE_ALPHA: return sizeof(unsigned short) * 2;
+          case GL_RGB:             return sizeof(unsigned short) * 3;
+          case GL_RGBA:            return sizeof(unsigned short) * 4;
+          default: UNREACHABLE();
+        }
+        break;
       default: UNREACHABLE();
     }
 
@@ -283,6 +305,21 @@
             return false;
         }
 
+      case GL_FLOAT:
+      case GL_HALF_FLOAT_OES:
+        switch (format)
+        {
+          case GL_RGBA:
+          case GL_RGB:
+          case GL_ALPHA:
+          case GL_LUMINANCE:
+          case GL_LUMINANCE_ALPHA:
+            return true;
+
+          default:
+            return false;
+        }
+
       case GL_UNSIGNED_SHORT_4_4_4_4:
       case GL_UNSIGNED_SHORT_5_5_5_1:
         return (format == GL_RGBA);