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//
// Copyright 2018 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.
//
// validationES2.h:
// Inlined validation functions for OpenGL ES 2.0 entry points.
#ifndef LIBANGLE_VALIDATION_ES2_H_
#define LIBANGLE_VALIDATION_ES2_H_
#include "libANGLE/ErrorStrings.h"
#include "libANGLE/validationES.h"
#include "libANGLE/validationES2_autogen.h"
namespace gl
{
ANGLE_INLINE bool ValidateDrawArrays(Context *context,
PrimitiveMode mode,
GLint first,
GLsizei count)
{
return ValidateDrawArraysCommon(context, mode, first, count, 1);
}
ANGLE_INLINE bool ValidateUniform2f(Context *context, GLint location, GLfloat x, GLfloat y)
{
return ValidateUniform(context, GL_FLOAT_VEC2, location, 1);
}
ANGLE_INLINE bool ValidateBindBuffer(Context *context, BufferBinding target, GLuint buffer)
{
if (!context->isValidBufferBinding(target))
{
context->validationError(GL_INVALID_ENUM, err::kInvalidBufferTypes);
return false;
}
if (!context->getState().isBindGeneratesResourceEnabled() &&
!context->isBufferGenerated(buffer))
{
context->validationError(GL_INVALID_OPERATION, err::kObjectNotGenerated);
return false;
}
return true;
}
ANGLE_INLINE bool ValidateDrawElements(Context *context,
PrimitiveMode mode,
GLsizei count,
DrawElementsType type,
const void *indices)
{
return ValidateDrawElementsCommon(context, mode, count, type, indices, 1);
}
ANGLE_INLINE bool ValidateVertexAttribPointer(Context *context,
GLuint index,
GLint size,
VertexAttribType type,
GLboolean normalized,
GLsizei stride,
const void *ptr)
{
if (!ValidateFloatVertexFormat(context, index, size, type))
{
return false;
}
if (stride < 0)
{
context->validationError(GL_INVALID_VALUE, err::kNegativeStride);
return false;
}
if (context->getClientVersion() >= ES_3_1)
{
const Caps &caps = context->getCaps();
if (stride > caps.maxVertexAttribStride)
{
context->validationError(GL_INVALID_VALUE, err::kExceedsMaxVertexAttribStride);
return false;
}
if (index >= caps.maxVertexAttribBindings)
{
context->validationError(GL_INVALID_VALUE, err::kExceedsMaxVertexAttribBindings);
return false;
}
}
// [OpenGL ES 3.0.2] Section 2.8 page 24:
// An INVALID_OPERATION error is generated when a non-zero vertex array object
// is bound, zero is bound to the ARRAY_BUFFER buffer object binding point,
// and the pointer argument is not NULL.
bool nullBufferAllowed = context->getState().areClientArraysEnabled() &&
context->getState().getVertexArray()->id() == 0;
if (!nullBufferAllowed && context->getState().getTargetBuffer(BufferBinding::Array) == 0 &&
ptr != nullptr)
{
context->validationError(GL_INVALID_OPERATION, err::kClientDataInVertexArray);
return false;
}
if (context->getExtensions().webglCompatibility)
{
// WebGL 1.0 [Section 6.14] Fixed point support
// The WebGL API does not support the GL_FIXED data type.
if (type == VertexAttribType::Fixed)
{
context->validationError(GL_INVALID_ENUM, err::kFixedNotInWebGL);
return false;
}
if (!ValidateWebGLVertexAttribPointer(context, type, normalized, stride, ptr, false))
{
return false;
}
}
return true;
}
void RecordBindTextureTypeError(Context *context, TextureType target);
ANGLE_INLINE bool ValidateBindTexture(Context *context, TextureType target, GLuint texture)
{
if (!context->getStateCache().isValidBindTextureType(target))
{
RecordBindTextureTypeError(context, target);
return false;
}
if (texture == 0)
{
return true;
}
Texture *textureObject = context->getTexture(texture);
if (textureObject && textureObject->getType() != target)
{
context->validationError(GL_INVALID_OPERATION, err::kTextureTargetMismatch);
return false;
}
if (!context->getState().isBindGeneratesResourceEnabled() &&
!context->isTextureGenerated(texture))
{
context->validationError(GL_INVALID_OPERATION, err::kObjectNotGenerated);
return false;
}
return true;
}
// Validation of all Tex[Sub]Image2D parameters except TextureTarget.
bool ValidateES2TexImageParametersBase(Context *context,
TextureTarget target,
GLint level,
GLenum internalformat,
bool isCompressed,
bool isSubImage,
GLint xoffset,
GLint yoffset,
GLsizei width,
GLsizei height,
GLint border,
GLenum format,
GLenum type,
GLsizei imageSize,
const void *pixels);
} // namespace gl
#endif // LIBANGLE_VALIDATION_ES2_H_
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