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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "graphicshelperes3_2_p.h"
#include <QOpenGLExtraFunctions>
#include <Qt3DRender/qrendertargetoutput.h>
#include <private/attachmentpack_p.h>
QT_BEGIN_NAMESPACE
#ifndef GL_DRAW_FRAMEBUFFER
#define GL_DRAW_FRAMEBUFFER 0x8CA9
#endif
#ifndef GL_DEPTH_STENCIL_ATTACHMENT
#define GL_DEPTH_STENCIL_ATTACHMENT 0x821A
#endif
#ifndef GL_PATCH_VERTICES
#define GL_PATCH_VERTICES 36466
#endif
#ifndef GL_IMAGE_BUFFER
#define GL_IMAGE_BUFFER 0x9051
#endif
#ifndef GL_IMAGE_CUBE_MAP_ARRAY
#define GL_IMAGE_CUBE_MAP_ARRAY 0x9054
#endif
#ifndef GL_INT_IMAGE_BUFFER
#define GL_INT_IMAGE_BUFFER 0x905C
#endif
#ifndef GL_INT_IMAGE_CUBE_MAP_ARRAY
#define GL_INT_IMAGE_CUBE_MAP_ARRAY 0x905F
#endif
#ifndef GL_UNSIGNED_INT_IMAGE_BUFFER
#define GL_UNSIGNED_INT_IMAGE_BUFFER 0x9067
#endif
#ifndef GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY
#define GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY 0x906A
#endif
namespace Qt3DRender {
namespace Render {
namespace OpenGL {
GraphicsHelperES3_2::GraphicsHelperES3_2()
{
}
GraphicsHelperES3_2::~GraphicsHelperES3_2()
{
}
bool GraphicsHelperES3_2::supportsFeature(GraphicsHelperInterface::Feature feature) const
{
switch (feature) {
case GraphicsHelperInterface::Tessellation:
return true;
default:
break;
}
return GraphicsHelperES3_1::supportsFeature(feature);
}
bool GraphicsHelperES3_2::frameBufferNeedsRenderBuffer(const Attachment &attachment)
{
Q_UNUSED(attachment);
// This is first ES version where we have glFramebufferTexture, so
// attaching a D24S8 texture to the combined depth-stencil attachment point
// should work.
return false;
}
void GraphicsHelperES3_2::bindFrameBufferAttachment(QOpenGLTexture *texture, const Attachment &attachment)
{
GLenum attr = GL_COLOR_ATTACHMENT0;
if (attachment.m_point <= QRenderTargetOutput::Color15)
attr = GL_COLOR_ATTACHMENT0 + attachment.m_point;
else if (attachment.m_point == QRenderTargetOutput::Depth)
attr = GL_DEPTH_ATTACHMENT;
else if (attachment.m_point == QRenderTargetOutput::Stencil)
attr = GL_STENCIL_ATTACHMENT;
else if (attachment.m_point == QRenderTargetOutput::DepthStencil)
attr = GL_DEPTH_STENCIL_ATTACHMENT;
else
qCritical() << "Unsupported FBO attachment OpenGL ES 3.2";
const QOpenGLTexture::Target target = texture->target();
texture->bind();
if (target == QOpenGLTexture::TargetCubeMap && attachment.m_face != QAbstractTexture::AllFaces)
m_funcs->glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, attr, attachment.m_face, texture->textureId(), attachment.m_mipLevel);
else
m_extraFuncs->glFramebufferTexture(GL_DRAW_FRAMEBUFFER, attr, texture->textureId(), attachment.m_mipLevel);
texture->release();
}
void GraphicsHelperES3_2::setVerticesPerPatch(GLint verticesPerPatch)
{
m_extraFuncs->glPatchParameteri(GL_PATCH_VERTICES, verticesPerPatch);
}
void GraphicsHelperES3_2::drawElementsInstancedBaseVertexBaseInstance(GLenum primitiveType, GLsizei primitiveCount, GLint indexType, void *indices, GLsizei instances, GLint baseVertex, GLint baseInstance)
{
if (baseInstance != 0)
qWarning() << "glDrawElementsInstancedBaseVertexBaseInstance is not supported with OpenGL ES 3.2";
m_extraFuncs->glDrawElementsInstancedBaseVertex(primitiveType,
primitiveCount,
indexType,
indices,
instances,
baseVertex);
}
UniformType GraphicsHelperES3_2::uniformTypeFromGLType(GLenum glType)
{
switch (glType) {
case GL_IMAGE_BUFFER:
case GL_IMAGE_CUBE_MAP_ARRAY:
case GL_INT_IMAGE_BUFFER:
case GL_INT_IMAGE_CUBE_MAP_ARRAY:
case GL_UNSIGNED_INT_IMAGE_BUFFER:
case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:
return UniformType::Image;
default:
return GraphicsHelperES3_1::uniformTypeFromGLType(glType);
}
}
uint GraphicsHelperES3_2::uniformByteSize(const ShaderUniform &description)
{
uint rawByteSize = 0;
switch (description.m_type) {
case GL_IMAGE_BUFFER:
case GL_IMAGE_CUBE_MAP_ARRAY:
case GL_INT_IMAGE_BUFFER:
case GL_INT_IMAGE_CUBE_MAP_ARRAY:
case GL_UNSIGNED_INT_IMAGE_BUFFER:
case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:
rawByteSize = 4;
break;
default:
rawByteSize = GraphicsHelperES3_1::uniformByteSize(description);
break;
}
return rawByteSize;
}
} // namespace OpenGL
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
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