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// Copyright 2019 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// format_map_desktop:
// Determining the sized internal format from a (format,type) pair.
// Also check DesktopGL format combinations for validity.
#include "angle_gl.h"
#include "common/debug.h"
#include "formatutils.h"
#include "renderer/gl/functionsgl_enums.h"
// TODO(http://anglebug.com/3730): switch ANGLE to generate its own GL enum types from gl.xml
namespace gl
{
bool ValidDesktopFormat(GLenum format)
{
switch (format)
{
case GL_STENCIL_INDEX:
case GL_DEPTH_COMPONENT:
case GL_DEPTH_STENCIL:
case GL_RED:
case GL_GREEN:
case GL_BLUE:
case GL_RG:
case GL_RGB:
case GL_RGBA:
case GL_BGR:
case GL_BGRA:
case GL_RED_INTEGER:
case GL_GREEN_INTEGER:
case GL_BLUE_INTEGER:
case GL_RG_INTEGER:
case GL_RGB_INTEGER:
case GL_RGBA_INTEGER:
case GL_BGR_INTEGER:
case GL_BGRA_INTEGER:
return true;
default:
return false;
}
}
bool ValidDesktopType(GLenum type)
{
switch (type)
{
case GL_UNSIGNED_BYTE:
case GL_BYTE:
case GL_UNSIGNED_SHORT:
case GL_SHORT:
case GL_UNSIGNED_INT:
case GL_INT:
case GL_HALF_FLOAT:
case GL_FLOAT:
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
case GL_UNSIGNED_INT_24_8:
case GL_UNSIGNED_INT_10F_11F_11F_REV:
case GL_UNSIGNED_INT_5_9_9_9_REV:
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
return true;
default:
return false;
}
}
// From OpenGL 4.6 spec section 8.4
bool ValidDesktopFormatCombination(GLenum format, GLenum type, GLenum internalFormat)
{
ASSERT(ValidDesktopFormat(format) && ValidDesktopType(type));
const InternalFormat &internalFormatInfo = GetInternalFormatInfo(internalFormat, type);
const InternalFormat &formatInfo = GetInternalFormatInfo(format, type);
switch (format)
{
case GL_RED_INTEGER:
case GL_GREEN_INTEGER:
case GL_BLUE_INTEGER:
case GL_RG_INTEGER:
case GL_RGB_INTEGER:
case GL_RGBA_INTEGER:
case GL_BGR_INTEGER:
case GL_BGRA_INTEGER:
switch (type)
{
case GL_HALF_FLOAT:
case GL_FLOAT:
case GL_UNSIGNED_INT_10F_11F_11F_REV:
case GL_UNSIGNED_INT_5_9_9_9_REV:
return false;
default:
break;
}
if (!internalFormatInfo.isInt())
return false;
break;
default:
// format is not an integer
if (internalFormatInfo.isInt())
return false;
if (formatInfo.isDepthOrStencil() != internalFormatInfo.isDepthOrStencil())
return false;
if (format == GL_STENCIL_INDEX && internalFormat != GL_STENCIL_INDEX)
return false;
break;
}
return true;
}
} // namespace gl
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