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//
// Copyright (c) 2013 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.
//
// angletypes.h : Defines a variety of structures and enum types that are used throughout libGLESv2
#include "libGLESv2/angletypes.h"
#include "libGLESv2/ProgramBinary.h"
#include "libGLESv2/VertexAttribute.h"
namespace gl
{
SamplerState::SamplerState()
: minFilter(GL_NEAREST_MIPMAP_LINEAR),
magFilter(GL_LINEAR),
wrapS(GL_REPEAT),
wrapT(GL_REPEAT),
wrapR(GL_REPEAT),
maxAnisotropy(1.0f),
baseLevel(0),
maxLevel(1000),
minLod(-FLT_MAX),
maxLod(FLT_MAX),
compareMode(GL_NONE),
compareFunc(GL_LEQUAL),
swizzleRed(GL_RED),
swizzleGreen(GL_GREEN),
swizzleBlue(GL_BLUE),
swizzleAlpha(GL_ALPHA)
{}
bool SamplerState::swizzleRequired() const
{
return swizzleRed != GL_RED || swizzleGreen != GL_GREEN ||
swizzleBlue != GL_BLUE || swizzleAlpha != GL_ALPHA;
}
static void MinMax(int a, int b, int *minimum, int *maximum)
{
if (a < b)
{
*minimum = a;
*maximum = b;
}
else
{
*minimum = b;
*maximum = a;
}
}
bool ClipRectangle(const Rectangle &source, const Rectangle &clip, Rectangle *intersection)
{
int minSourceX, maxSourceX, minSourceY, maxSourceY;
MinMax(source.x, source.x + source.width, &minSourceX, &maxSourceX);
MinMax(source.y, source.y + source.height, &minSourceY, &maxSourceY);
int minClipX, maxClipX, minClipY, maxClipY;
MinMax(clip.x, clip.x + clip.width, &minClipX, &maxClipX);
MinMax(clip.y, clip.y + clip.height, &minClipY, &maxClipY);
if (minSourceX >= maxClipX || maxSourceX <= minClipX || minSourceY >= maxClipY || maxSourceY <= minClipY)
{
if (intersection)
{
intersection->x = minSourceX;
intersection->y = maxSourceY;
intersection->width = maxSourceX - minSourceX;
intersection->height = maxSourceY - minSourceY;
}
return false;
}
else
{
if (intersection)
{
intersection->x = std::max(minSourceX, minClipX);
intersection->y = std::max(minSourceY, minClipY);
intersection->width = std::min(maxSourceX, maxClipX) - std::max(minSourceX, minClipX);
intersection->height = std::min(maxSourceY, maxClipY) - std::max(minSourceY, minClipY);
}
return true;
}
}
VertexFormat::VertexFormat()
: mType(GL_NONE),
mNormalized(GL_FALSE),
mComponents(0),
mPureInteger(false)
{}
VertexFormat::VertexFormat(GLenum type, GLboolean normalized, GLuint components, bool pureInteger)
: mType(type),
mNormalized(normalized),
mComponents(components),
mPureInteger(pureInteger)
{
// Float data can not be normalized, so ignore the user setting
if (mType == GL_FLOAT || mType == GL_HALF_FLOAT || mType == GL_FIXED)
{
mNormalized = GL_FALSE;
}
}
VertexFormat::VertexFormat(const VertexAttribute &attrib)
: mType(attrib.type),
mNormalized(attrib.normalized ? GL_TRUE : GL_FALSE),
mComponents(attrib.size),
mPureInteger(attrib.pureInteger)
{
// Ensure we aren't initializing a vertex format which should be using
// the current-value type
ASSERT(attrib.enabled);
// Float data can not be normalized, so ignore the user setting
if (mType == GL_FLOAT || mType == GL_HALF_FLOAT || mType == GL_FIXED)
{
mNormalized = GL_FALSE;
}
}
VertexFormat::VertexFormat(const VertexAttribute &attrib, GLenum currentValueType)
: mType(attrib.type),
mNormalized(attrib.normalized ? GL_TRUE : GL_FALSE),
mComponents(attrib.size),
mPureInteger(attrib.pureInteger)
{
if (!attrib.enabled)
{
mType = currentValueType;
mNormalized = GL_FALSE;
mComponents = 4;
mPureInteger = (currentValueType != GL_FLOAT);
}
// Float data can not be normalized, so ignore the user setting
if (mType == GL_FLOAT || mType == GL_HALF_FLOAT || mType == GL_FIXED)
{
mNormalized = GL_FALSE;
}
}
void VertexFormat::GetInputLayout(VertexFormat *inputLayout,
ProgramBinary *programBinary,
const VertexAttribute *attributes,
const gl::VertexAttribCurrentValueData *currentValues)
{
for (unsigned int attributeIndex = 0; attributeIndex < MAX_VERTEX_ATTRIBS; attributeIndex++)
{
int semanticIndex = programBinary->getSemanticIndex(attributeIndex);
if (semanticIndex != -1)
{
inputLayout[semanticIndex] = VertexFormat(attributes[attributeIndex], currentValues[attributeIndex].Type);
}
}
}
bool VertexFormat::operator==(const VertexFormat &other) const
{
return (mType == other.mType &&
mComponents == other.mComponents &&
mNormalized == other.mNormalized &&
mPureInteger == other.mPureInteger );
}
bool VertexFormat::operator!=(const VertexFormat &other) const
{
return !(*this == other);
}
bool VertexFormat::operator<(const VertexFormat& other) const
{
if (mType != other.mType)
{
return mType < other.mType;
}
if (mNormalized != other.mNormalized)
{
return mNormalized < other.mNormalized;
}
if (mComponents != other.mComponents)
{
return mComponents < other.mComponents;
}
return mPureInteger < other.mPureInteger;
}
}
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