evas gl - prefer alpha4 format for font textures if possible (save memory)

if alpha4 is possible (desktopgl) then use it for fonts as this should
cut memory in half for them and possibly speed things up due to less
memory bandwidth needed

diff --git a/src/modules/evas/engines/gl_common/evas_gl_texture.c b/src/modules/evas/engines/gl_common/evas_gl_texture.c
index f6db58d..12f9f61 100644 (file)
--- a/src/modules/evas/engines/gl_common/evas_gl_texture.c
+++ b/src/modules/evas/engines/gl_common/evas_gl_texture.c
@@ -2,28 +2,29 @@
 
 static const GLenum rgba_fmt   = GL_RGBA;
 static const GLenum rgba_ifmt  = GL_RGBA;
-//#ifdef GL_GLES
-//static const GLenum rgb_fmt    = GL_RGBA;
-//static const GLenum rgb_ifmt   = GL_RGBA;
-//#else
 static const GLenum rgb_fmt    = GL_RGBA;
 static const GLenum rgb_ifmt   = GL_RGB;
-//#endif
-#ifdef GL_BGRA
-# ifdef GL_GLES
+
+#ifdef GL_GLES
 static const GLenum bgra_fmt   = GL_BGRA;
 static const GLenum bgra_ifmt  = GL_BGRA;
 static const GLenum bgr_fmt    = GL_BGRA;
 static const GLenum bgr_ifmt   = GL_BGRA;
-# else
+#else
 static const GLenum bgra_fmt   = GL_BGRA;
 static const GLenum bgra_ifmt  = GL_RGBA;
 static const GLenum bgr_fmt    = GL_BGRA;
 static const GLenum bgr_ifmt   = GL_RGB;
-# endif
 #endif
+
+#ifdef GL_GLES
 static const GLenum alpha_fmt      = GL_ALPHA;
 static const GLenum alpha_ifmt     = GL_ALPHA;
+#else
+static const GLenum alpha_fmt      = GL_ALPHA;
+static const GLenum alpha_ifmt     = GL_ALPHA4;
+#endif
+
 static const GLenum lum_fmt        = GL_LUMINANCE;
 static const GLenum lum_ifmt       = GL_LUMINANCE;
 static const GLenum lum_alpha_fmt  = GL_LUMINANCE_ALPHA;
@@ -159,18 +160,33 @@ _tex_format_index(GLuint format)
 {
    switch (format)
      {
-     case GL_RGBA:
-#ifdef GL_BGRA
-     case GL_BGRA:
-#endif
+      case GL_RGBA:
+      case GL_RGBA4:
+      case GL_RGBA8:
+      case GL_RGBA12:
+      case GL_RGBA16:
+      case GL_BGRA:
         return 0;
-     case GL_RGB:
+      case GL_RGB:
+      case GL_RGB4:
+      case GL_RGB8:
+      case GL_RGB12:
+      case GL_RGB16:
         return 1;
-     case GL_ALPHA:
+      case GL_ALPHA:
+      case GL_ALPHA4:
+      case GL_ALPHA8:
+      case GL_ALPHA12:
+      case GL_ALPHA16:
         return 2;
-     case GL_LUMINANCE: // never used in atlas
+      case GL_LUMINANCE: // never used in atlas
+      case GL_LUMINANCE4:
+      case GL_LUMINANCE8:
+      case GL_LUMINANCE12:
+      case GL_LUMINANCE16:
         return 3;
-     default:
+        // XXX: luminance_alpha not supported at all
+      default:
         return 0;
      }
    return 0;