Fixed format validations

Format validations were failing if the exact same format
wasn't used between different texture related calls to the
same texture, even when the formats were equivalent, so I
added a GetSizedInternalFormat function based on a format
map (courtesy of Angle). The validation checks were also
unified in utilities.cpp and used wherever texture formats
were used, to make sure Image objects used in Texture
objects always use the sized format, so that format
comparisons work properly.

Change-Id: I72fc8fb1b0f135ac679c274866e5b8e223541e7f
Reviewed-on: https://swiftshader-review.googlesource.com/4082
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

src/OpenGL/common/Image.cpp

diff --git a/src/OpenGL/common/Image.cpp b/src/OpenGL/common/Image.cpp
index 32c3744..9799f98 100644
--- a/src/OpenGL/common/Image.cpp
+++ b/src/OpenGL/common/Image.cpp
@@ -468,6 +468,7 @@
 			}
 			break;
 		case GL_BGRA_EXT:
+		case GL_BGRA8_EXT:
 			switch(type)
 			{
 			case GL_UNSIGNED_BYTE:          return sw::FORMAT_A8R8G8B8;
@@ -735,6 +736,7 @@
 			case GL_RGBA_INTEGER:
 				return sw::FORMAT_A8B8G8R8UI;
 			case GL_BGRA_EXT:
+			case GL_BGRA8_EXT:
 				return sw::FORMAT_A8R8G8B8;
 			case GL_ALPHA:
 			case GL_ALPHA8_EXT:
@@ -923,7 +925,8 @@
 			case GL_SRGB8_ALPHA8:
 			case GL_RGBA:            return sizeof(unsigned char) * 4;
 			case GL_RGBA_INTEGER:    return sizeof(unsigned char) * 4;
-			case GL_BGRA_EXT:        return sizeof(unsigned char) * 4;
+			case GL_BGRA_EXT:
+			case GL_BGRA8_EXT:       return sizeof(unsigned char)* 4;
 			default: UNREACHABLE(format);
 			}
 			break;
@@ -1226,6 +1229,7 @@
 					case GL_RGBA:
 					case GL_RGBA_INTEGER:
 					case GL_BGRA_EXT:
+					case GL_BGRA8_EXT:
 						LoadImageData<Bytes_4>(xoffset, yoffset, zoffset, width, height, depth, inputPitch, inputHeight, getPitch(), getHeight(), input, buffer);
 						break;
 					default: UNREACHABLE(format);
@@ -1267,6 +1271,7 @@
 					case GL_RGBA:
 					case GL_RGBA_INTEGER:
 					case GL_BGRA_EXT:
+					case GL_BGRA8_EXT:
 						LoadImageData<Bytes_4>(xoffset, yoffset, zoffset, width, height, depth, inputPitch, inputHeight, getPitch(), getHeight(), input, buffer);
 						break;
 					case GL_SRGB8:
@@ -1441,6 +1446,7 @@
 					case GL_RGBA:
 					case GL_RGBA_INTEGER:
 					case GL_BGRA_EXT:
+					case GL_BGRA8_EXT:
 						LoadImageData<Bytes_8>(xoffset, yoffset, zoffset, width, height, depth, inputPitch, inputHeight, getPitch(), getHeight(), input, buffer);
 						break;
 					default: UNREACHABLE(format);
@@ -1471,6 +1477,7 @@
 					case GL_RGBA:
 					case GL_RGBA_INTEGER:
 					case GL_BGRA_EXT:
+					case GL_BGRA8_EXT:
 						LoadImageData<Bytes_8>(xoffset, yoffset, zoffset, width, height, depth, inputPitch, inputHeight, getPitch(), getHeight(), input, buffer);
 						break;
 					case GL_DEPTH_COMPONENT:
@@ -1505,6 +1512,7 @@
 					case GL_RGBA:
 					case GL_RGBA_INTEGER:
 					case GL_BGRA_EXT:
+					case GL_BGRA8_EXT:
 						LoadImageData<Bytes_16>(xoffset, yoffset, zoffset, width, height, depth, inputPitch, inputHeight, getPitch(), getHeight(), input, buffer);
 						break;
 					default: UNREACHABLE(format);
@@ -1535,6 +1543,7 @@
 					case GL_RGBA:
 					case GL_RGBA_INTEGER:
 					case GL_BGRA_EXT:
+					case GL_BGRA8_EXT:
 						LoadImageData<Bytes_8>(xoffset, yoffset, zoffset, width, height, depth, inputPitch, inputHeight, getPitch(), getHeight(), input, buffer);
 						break;
 					case GL_DEPTH_COMPONENT16: