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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 "libANGLE/angletypes.h"
#include "libANGLE/Program.h"
#include "libANGLE/VertexAttribute.h"
#include "libANGLE/State.h"
#include "libANGLE/VertexArray.h"
namespace gl
{
PrimitiveType GetPrimitiveType(GLenum drawMode)
{
switch (drawMode)
{
case GL_POINTS:
return PRIMITIVE_POINTS;
case GL_LINES:
return PRIMITIVE_LINES;
case GL_LINE_STRIP:
return PRIMITIVE_LINE_STRIP;
case GL_LINE_LOOP:
return PRIMITIVE_LINE_LOOP;
case GL_TRIANGLES:
return PRIMITIVE_TRIANGLES;
case GL_TRIANGLE_STRIP:
return PRIMITIVE_TRIANGLE_STRIP;
case GL_TRIANGLE_FAN:
return PRIMITIVE_TRIANGLE_FAN;
default:
UNREACHABLE();
return PRIMITIVE_TYPE_MAX;
}
}
SamplerState::SamplerState()
: minFilter(GL_NEAREST_MIPMAP_LINEAR),
magFilter(GL_LINEAR),
wrapS(GL_REPEAT),
wrapT(GL_REPEAT),
wrapR(GL_REPEAT),
maxAnisotropy(1.0f),
minLod(-1000.0f),
maxLod(1000.0f),
compareMode(GL_NONE),
compareFunc(GL_LEQUAL)
{
}
// static
SamplerState SamplerState::CreateDefaultForTarget(GLenum target)
{
SamplerState state;
// According to OES_EGL_image_external: For external textures, the default min filter is
// GL_LINEAR and the default s and t wrap modes are GL_CLAMP_TO_EDGE.
if (target == GL_TEXTURE_EXTERNAL_OES)
{
state.minFilter = GL_LINEAR;
state.wrapS = GL_CLAMP_TO_EDGE;
state.wrapT = GL_CLAMP_TO_EDGE;
}
return state;
}
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;
}
}
bool Box::operator==(const Box &other) const
{
return (x == other.x && y == other.y && z == other.z &&
width == other.width && height == other.height && depth == other.depth);
}
bool Box::operator!=(const Box &other) const
{
return !(*this == other);
}
bool operator==(const Extents &lhs, const Extents &rhs)
{
return lhs.width == rhs.width && lhs.height == rhs.height && lhs.depth == rhs.depth;
}
bool operator!=(const Extents &lhs, const Extents &rhs)
{
return !(lhs == rhs);
}
}
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