graphicshelpergl4.cpp

qt/qt3d/src/plugins/renderers/opengl/graphicshelpers/graphicshelpergl4.cpp (file symbol)

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// Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#include "graphicshelpergl4_p.h"

#if !QT_CONFIG(opengles2)

#include <QOpenGLFunctions_4_3_Core>

#include <private/attachmentpack_p.h>

#include <qgraphicsutils_p.h>

#include <logging_p.h>

# ifndef QT_OPENGL_4_3

#  ifndef GL_PATCH_VERTICES

#    define GL_PATCH_VERTICES 36466

#  endif

#  define GL_ACTIVE_RESOURCES 0x92F5

#  define GL_BUFFER_BINDING 0x9302

#  define GL_BUFFER_DATA_SIZE 0x9303

#  define GL_NUM_ACTIVE_VARIABLES 0x9304

#  define GL_SHADER_STORAGE_BLOCK 0x92E6

#  define GL_UNIFORM 0x92E1

#  define GL_UNIFORM_BLOCK 0x92E2

#  define GL_UNIFORM_BLOCK_INDEX 0x8A3A

#  define GL_UNIFORM_OFFSET 0x8A3B

#  define GL_UNIFORM_ARRAY_STRIDE 0x8A3C

#  define GL_UNIFORM_MATRIX_STRIDE 0x8A3D

#  define GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS 0x8A42

#  define GL_UNIFORM_BLOCK_BINDING 0x8A3F

#  define GL_UNIFORM_BLOCK_DATA_SIZE 0x8A40

#  define GL_ALL_BARRIER_BITS 0xFFFFFFFF

#  define GL_VERTEX_ATTRIB_ARRAY_BARRIER_BIT 0x00000001

#  define GL_ELEMENT_ARRAY_BARRIER_BIT 0x00000002

#  define GL_UNIFORM_BARRIER_BIT 0x00000004

#  define GL_TEXTURE_FETCH_BARRIER_BIT 0x00000008

#  define GL_SHADER_IMAGE_ACCESS_BARRIER_BIT 0x00000020

#  define GL_COMMAND_BARRIER_BIT 0x00000040

#  define GL_PIXEL_BUFFER_BARRIER_BIT 0x00000080

#  define GL_TEXTURE_UPDATE_BARRIER_BIT 0x00000100

#  define GL_BUFFER_UPDATE_BARRIER_BIT 0x00000200

#  define GL_FRAMEBUFFER_BARRIER_BIT 0x00000400

#  define GL_TRANSFORM_FEEDBACK_BARRIER_BIT 0x00000800

#  define GL_ATOMIC_COUNTER_BARRIER_BIT 0x00001000

#  define GL_SHADER_STORAGE_BARRIER_BIT 0x00002000

#  define GL_QUERY_BUFFER_BARRIER_BIT 0x00008000

#  define GL_IMAGE_1D                       0x904C

#  define GL_IMAGE_2D                       0x904D

#  define GL_IMAGE_3D                       0x904E

#  define GL_IMAGE_2D_RECT                  0x904F

#  define GL_IMAGE_CUBE                     0x9050

#  define GL_IMAGE_BUFFER                   0x9051

#  define GL_IMAGE_1D_ARRAY                 0x9052

#  define GL_IMAGE_2D_ARRAY                 0x9053

#  define GL_IMAGE_CUBE_MAP_ARRAY           0x9054

#  define GL_IMAGE_2D_MULTISAMPLE           0x9055

#  define GL_IMAGE_2D_MULTISAMPLE_ARRAY     0x9056

#  define GL_INT_IMAGE_1D                   0x9057

#  define GL_INT_IMAGE_2D                   0x9058

#  define GL_INT_IMAGE_3D                   0x9059

#  define GL_INT_IMAGE_2D_RECT              0x905A

#  define GL_INT_IMAGE_CUBE                 0x905B

#  define GL_INT_IMAGE_BUFFER               0x905C

#  define GL_INT_IMAGE_1D_ARRAY             0x905D

#  define GL_INT_IMAGE_2D_ARRAY             0x905E

#  define GL_INT_IMAGE_CUBE_MAP_ARRAY       0x905F

#  define GL_INT_IMAGE_2D_MULTISAMPLE       0x9060

#  define GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY 0x9061

#  define GL_UNSIGNED_INT_IMAGE_1D          0x9062

#  define GL_UNSIGNED_INT_IMAGE_2D          0x9063

#  define GL_UNSIGNED_INT_IMAGE_3D          0x9064

#  define GL_UNSIGNED_INT_IMAGE_2D_RECT     0x9065

#  define GL_UNSIGNED_INT_IMAGE_CUBE        0x9066

#  define GL_UNSIGNED_INT_IMAGE_BUFFER      0x9067

#  define GL_UNSIGNED_INT_IMAGE_1D_ARRAY    0x9068

#  define GL_UNSIGNED_INT_IMAGE_2D_ARRAY    0x9069

#  define GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY 0x906A

#  define GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE 0x906B

#  define GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY 0x906C

# endif

QT_BEGIN_NAMESPACE

namespace Qt3DRender {

namespace Render {

namespace OpenGL {

namespace {

GLbitfield memoryBarrierGL4Bitfield(QMemoryBarrier::Operations barriers)

    GLbitfield bits = 0;

    if (barriers.testFlag(QMemoryBarrier::All)) {

        bits |= GL_ALL_BARRIER_BITS;

        return bits;

    if (barriers.testFlag(QMemoryBarrier::VertexAttributeArray))

        bits |= GL_VERTEX_ATTRIB_ARRAY_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::ElementArray))

        bits |= GL_ELEMENT_ARRAY_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::Uniform))

        bits |= GL_UNIFORM_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::TextureFetch))

        bits |= GL_TEXTURE_FETCH_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::ShaderImageAccess))

        bits |= GL_SHADER_IMAGE_ACCESS_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::Command))

        bits |= GL_COMMAND_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::PixelBuffer))

        bits |= GL_PIXEL_BUFFER_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::TextureUpdate))

        bits |= GL_TEXTURE_UPDATE_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::BufferUpdate))

        bits |= GL_BUFFER_UPDATE_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::FrameBuffer))

        bits |= GL_FRAMEBUFFER_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::TransformFeedback))

        bits |= GL_TRANSFORM_FEEDBACK_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::AtomicCounter))

        bits |= GL_ATOMIC_COUNTER_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::ShaderStorage))

        bits |= GL_SHADER_STORAGE_BARRIER_BIT;

    if (barriers.testFlag(QMemoryBarrier::QueryBuffer))

        bits |= GL_QUERY_BUFFER_BARRIER_BIT;

    return bits;

GraphicsHelperGL4::GraphicsHelperGL4()

    : m_funcs(nullptr)

void GraphicsHelperGL4::initializeHelper(QOpenGLContext *context,

                                         QAbstractOpenGLFunctions *functions)

    Q_UNUSED(context);

    m_funcs = static_cast<QOpenGLFunctions_4_3_Core*>(functions);

    const bool ok = m_funcs->initializeOpenGLFunctions();

    Q_ASSERT(ok);

    Q_UNUSED(ok);

void GraphicsHelperGL4::drawElementsInstancedBaseVertexBaseInstance(GLenum primitiveType,

                                                                    GLsizei primitiveCount,

                                                                    GLint indexType,

                                                                    void *indices,

                                                                    GLsizei instances,

                                                                    GLint baseVertex,

                                                                    GLint baseInstance)

    m_funcs->glDrawElementsInstancedBaseVertexBaseInstance(primitiveType,

                                               primitiveCount,

                                               indexType,

                                               indices,

                                               instances,

                                               baseVertex,

                                               baseInstance);

void GraphicsHelperGL4::drawArraysInstanced(GLenum primitiveType,

                                            GLint first,

                                            GLsizei count,

                                            GLsizei instances)

    // glDrawArraysInstanced OpenGL 3.1 or greater

    m_funcs->glDrawArraysInstanced(primitiveType,

                                   first,

                                   count,

                                   instances);

void GraphicsHelperGL4::drawArraysInstancedBaseInstance(GLenum primitiveType, GLint first, GLsizei count, GLsizei instances, GLsizei baseInstance)

    m_funcs->glDrawArraysInstancedBaseInstance(primitiveType,

                                               first,

                                               count,

                                               instances,

                                               baseInstance);

void GraphicsHelperGL4::drawElements(GLenum primitiveType,

                                     GLsizei primitiveCount,

                                     GLint indexType,

                                     void *indices,

                                     GLint baseVertex)

    m_funcs->glDrawElementsBaseVertex(primitiveType,

                                      primitiveCount,

                                      indexType,

                                      indices,

                                      baseVertex);

void GraphicsHelperGL4::drawElementsIndirect(GLenum mode,

                                             GLenum type,

                                             void *indirect)

    m_funcs->glDrawElementsIndirect(mode, type, indirect);

void GraphicsHelperGL4::drawArrays(GLenum primitiveType,

                                   GLint first,

                                   GLsizei count)

    m_funcs->glDrawArrays(primitiveType,

                          first,

                          count);

void GraphicsHelperGL4::drawArraysIndirect(GLenum mode, void *indirect)

    m_funcs->glDrawArraysIndirect(mode, indirect);

void GraphicsHelperGL4::setVerticesPerPatch(GLint verticesPerPatch)

    m_funcs->glPatchParameteri(GL_PATCH_VERTICES, verticesPerPatch);

void GraphicsHelperGL4::useProgram(GLuint programId)

    m_funcs->glUseProgram(programId);

std::vector<ShaderUniform> GraphicsHelperGL4::programUniformsAndLocations(GLuint programId)

    std::vector<ShaderUniform> uniforms;

    GLint nbrActiveUniforms = 0;

    m_funcs->glGetProgramInterfaceiv(programId, GL_UNIFORM, GL_ACTIVE_RESOURCES, &nbrActiveUniforms);

    uniforms.reserve(nbrActiveUniforms);

    char uniformName[256];

    for (GLint i = 0; i < nbrActiveUniforms; ++i) {

        ShaderUniform uniform;

        GLsizei uniformNameLength = 0;

        // Size is 1 for scalar and more for struct or arrays

        // Type is the GL Type

        m_funcs->glGetActiveUniform(programId, i, sizeof(uniformName) - 1, &uniformNameLength,

                                    &uniform.m_size, &uniform.m_type, uniformName);

        uniformName[sizeof(uniformName) - 1] = '\0';

        uniform.m_location = m_funcs->glGetUniformLocation(programId, uniformName);

        uniform.m_name = QString::fromUtf8(uniformName, uniformNameLength);

        // Work around for uniform array names that aren't returned with [0] by some drivers

        if (uniform.m_size > 1 && !uniform.m_name.endsWith(QLatin1String("[0]")))

            uniform.m_name.append(QLatin1String("[0]"));

        m_funcs->glGetActiveUniformsiv(programId, 1, (GLuint*)&i, GL_UNIFORM_BLOCK_INDEX, &uniform.m_blockIndex);

        m_funcs->glGetActiveUniformsiv(programId, 1, (GLuint*)&i, GL_UNIFORM_OFFSET, &uniform.m_offset);

        m_funcs->glGetActiveUniformsiv(programId, 1, (GLuint*)&i, GL_UNIFORM_ARRAY_STRIDE, &uniform.m_arrayStride);

        m_funcs->glGetActiveUniformsiv(programId, 1, (GLuint*)&i, GL_UNIFORM_MATRIX_STRIDE, &uniform.m_matrixStride);

        uniform.m_rawByteSize = uniformByteSize(uniform);

        uniforms.push_back(uniform);

        qCDebug(Rendering) << uniform.m_name << "size" << uniform.m_size

                           << " offset" << uniform.m_offset

                           << " rawSize" << uniform.m_rawByteSize;

    return uniforms;

std::vector<ShaderAttribute> GraphicsHelperGL4::programAttributesAndLocations(GLuint programId)

    std::vector<ShaderAttribute> attributes;

    GLint nbrActiveAttributes = 0;

    m_funcs->glGetProgramiv(programId, GL_ACTIVE_ATTRIBUTES, &nbrActiveAttributes);

    attributes.reserve(nbrActiveAttributes);

    char attributeName[256];

    for (GLint i = 0; i < nbrActiveAttributes; ++i) {

        ShaderAttribute attribute;

        GLsizei attributeNameLength = 0;

        // Size is 1 for scalar and more for struct or arrays

        // Type is the GL Type

        m_funcs->glGetActiveAttrib(programId, i, sizeof(attributeName) - 1, &attributeNameLength,

                                   &attribute.m_size, &attribute.m_type, attributeName);

        attributeName[sizeof(attributeName) - 1] = '\0';

        attribute.m_location = m_funcs->glGetAttribLocation(programId, attributeName);

        attribute.m_name = QString::fromUtf8(attributeName, attributeNameLength);

        attributes.push_back(attribute);

    return attributes;

std::vector<ShaderUniformBlock> GraphicsHelperGL4::programUniformBlocks(GLuint programId)

    std::vector<ShaderUniformBlock> blocks;

    GLint nbrActiveUniformsBlocks = 0;

    m_funcs->glGetProgramInterfaceiv(programId, GL_UNIFORM_BLOCK, GL_ACTIVE_RESOURCES, &nbrActiveUniformsBlocks);

    blocks.reserve(nbrActiveUniformsBlocks);

    for (GLint i = 0; i < nbrActiveUniformsBlocks; ++i) {

        QByteArray uniformBlockName(256, '\0');

        GLsizei length = 0;

        ShaderUniformBlock uniformBlock;

        m_funcs->glGetProgramResourceName(programId, GL_UNIFORM_BLOCK, i, 256, &length, uniformBlockName.data());

        uniformBlock.m_name = QString::fromUtf8(uniformBlockName.left(length));

        uniformBlock.m_index = i;

        GLenum prop = GL_BUFFER_BINDING;

        m_funcs->glGetProgramResourceiv(programId, GL_UNIFORM_BLOCK, i, 1, &prop, 4, NULL, &uniformBlock.m_binding);

        prop = GL_BUFFER_DATA_SIZE;

        m_funcs->glGetProgramResourceiv(programId, GL_UNIFORM_BLOCK, i, 1, &prop, 4, NULL, &uniformBlock.m_size);

        prop = GL_NUM_ACTIVE_VARIABLES;

        m_funcs->glGetProgramResourceiv(programId, GL_UNIFORM_BLOCK, i, 1, &prop, 4, NULL, &uniformBlock.m_activeUniformsCount);

        blocks.push_back(uniformBlock);

    return blocks;

std::vector<ShaderStorageBlock> GraphicsHelperGL4::programShaderStorageBlocks(GLuint programId)

    std::vector<ShaderStorageBlock> blocks;

    GLint nbrActiveShaderStorageBlocks = 0;

    m_funcs->glGetProgramInterfaceiv(programId, GL_SHADER_STORAGE_BLOCK, GL_ACTIVE_RESOURCES, &nbrActiveShaderStorageBlocks);

    blocks.reserve(nbrActiveShaderStorageBlocks);

    for (GLint i = 0; i < nbrActiveShaderStorageBlocks; ++i) {

        QByteArray storageBlockName(256, '\0');

        GLsizei length = 0;

        ShaderStorageBlock storageBlock;

        m_funcs->glGetProgramResourceName(programId, GL_SHADER_STORAGE_BLOCK, i, 256, &length, storageBlockName.data());

        storageBlock.m_index = i;

        storageBlock.m_name = QString::fromUtf8(storageBlockName.left(length));

        GLenum prop = GL_BUFFER_BINDING;

        m_funcs->glGetProgramResourceiv(programId, GL_SHADER_STORAGE_BLOCK, i, 1, &prop, 4, NULL, &storageBlock.m_binding);

        prop = GL_BUFFER_DATA_SIZE;

        m_funcs->glGetProgramResourceiv(programId, GL_SHADER_STORAGE_BLOCK, i, 1, &prop, 4, NULL, &storageBlock.m_size);

        prop = GL_NUM_ACTIVE_VARIABLES;

        m_funcs->glGetProgramResourceiv(programId, GL_SHADER_STORAGE_BLOCK, i, 1, &prop, 4, NULL, &storageBlock.m_activeVariablesCount);

        blocks.push_back(storageBlock);

    return blocks;

void GraphicsHelperGL4::vertexAttribDivisor(GLuint index, GLuint divisor)

    m_funcs->glVertexAttribDivisor(index, divisor);

void GraphicsHelperGL4::vertexAttributePointer(GLenum shaderDataType,

                                               GLuint index,

                                               GLint size,

                                               GLenum type,

                                               GLboolean normalized,

                                               GLsizei stride,

                                               const GLvoid *pointer)

    switch (shaderDataType) {

    case GL_FLOAT:

    case GL_FLOAT_VEC2:

    case GL_FLOAT_VEC3:

    case GL_FLOAT_VEC4:

    case GL_FLOAT_MAT2:

    case GL_FLOAT_MAT2x3:

    case GL_FLOAT_MAT2x4:

    case GL_FLOAT_MAT3:

    case GL_FLOAT_MAT3x2:

    case GL_FLOAT_MAT3x4:

    case GL_FLOAT_MAT4x2:

    case GL_FLOAT_MAT4x3:

    case GL_FLOAT_MAT4:

        m_funcs->glVertexAttribPointer(index, size, type, normalized, stride, pointer);

        break;

    case GL_INT:

    case GL_INT_VEC2:

    case GL_INT_VEC3:

    case GL_INT_VEC4:

    case GL_UNSIGNED_INT:

    case GL_UNSIGNED_INT_VEC2:

    case GL_UNSIGNED_INT_VEC3:

    case GL_UNSIGNED_INT_VEC4:

        m_funcs->glVertexAttribIPointer(index, size, type, stride, pointer);

        break;

    case GL_DOUBLE:

    case GL_DOUBLE_VEC2:

    case GL_DOUBLE_VEC3:

    case GL_DOUBLE_VEC4:

        m_funcs->glVertexAttribLPointer(index, size, type, stride, pointer);

        break;

    default:

        qCWarning(Rendering) << "vertexAttribPointer: Unhandled type";

        Q_UNREACHABLE();

void GraphicsHelperGL4::readBuffer(GLenum mode)

    m_funcs->glReadBuffer(mode);

void GraphicsHelperGL4::drawBuffer(GLenum mode)

    m_funcs->glDrawBuffer(mode);

void *GraphicsHelperGL4::fenceSync()

    return m_funcs->glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);

void GraphicsHelperGL4::clientWaitSync(void *sync, GLuint64 nanoSecTimeout)

    qDebug() << Q_FUNC_INFO << sync << static_cast<GLsync>(sync);

    GLenum e = m_funcs->glClientWaitSync(static_cast<GLsync>(sync), GL_SYNC_FLUSH_COMMANDS_BIT, nanoSecTimeout);

    qDebug() << e;

void GraphicsHelperGL4::waitSync(void *sync)

    m_funcs->glWaitSync(static_cast<GLsync>(sync), 0, GL_TIMEOUT_IGNORED);

bool GraphicsHelperGL4::wasSyncSignaled(void *sync)

    GLint v = 0;

    m_funcs->glGetSynciv(static_cast<GLsync>(sync),

                         GL_SYNC_STATUS,

                         sizeof(v),

                         nullptr,

                         &v);

    return v == GL_SIGNALED;

void GraphicsHelperGL4::deleteSync(void *sync)

    m_funcs->glDeleteSync(static_cast<GLsync>(sync));

void GraphicsHelperGL4::rasterMode(GLenum faceMode, GLenum rasterMode)

    m_funcs->glPolygonMode(faceMode, rasterMode);

void GraphicsHelperGL4::glUniform1fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniform1fv(location, count, values);

void GraphicsHelperGL4::glUniform2fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniform2fv(location, count, values);

void GraphicsHelperGL4::glUniform3fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniform3fv(location, count, values);

void GraphicsHelperGL4::glUniform4fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniform4fv(location, count, values);

void GraphicsHelperGL4::glUniform1iv(GLint location, GLsizei count, const GLint *values)

    m_funcs->glUniform1iv(location, count, values);

void GraphicsHelperGL4::glUniform2iv(GLint location, GLsizei count, const GLint *values)

    m_funcs->glUniform2iv(location, count, values);

void GraphicsHelperGL4::glUniform3iv(GLint location, GLsizei count, const GLint *values)

    m_funcs->glUniform3iv(location, count, values);

void GraphicsHelperGL4::glUniform4iv(GLint location, GLsizei count, const GLint *values)

    m_funcs->glUniform4iv(location, count, values);

void GraphicsHelperGL4::glUniform1uiv(GLint location, GLsizei count, const GLuint *values)

    m_funcs->glUniform1uiv(location, count, values);

void GraphicsHelperGL4::glUniform2uiv(GLint location, GLsizei count, const GLuint *values)

    m_funcs->glUniform2uiv(location, count, values);

void GraphicsHelperGL4::glUniform3uiv(GLint location, GLsizei count, const GLuint *values)

    m_funcs->glUniform3uiv(location, count, values);

void GraphicsHelperGL4::glUniform4uiv(GLint location, GLsizei count, const GLuint *values)

    m_funcs->glUniform4uiv(location, count, values);

void GraphicsHelperGL4::glUniformMatrix2fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniformMatrix2fv(location, count, false, values);

void GraphicsHelperGL4::glUniformMatrix3fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniformMatrix3fv(location, count, false, values);

void GraphicsHelperGL4::glUniformMatrix4fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniformMatrix4fv(location, count, false, values);

void GraphicsHelperGL4::glUniformMatrix2x3fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniformMatrix2x3fv(location, count, false, values);

void GraphicsHelperGL4::glUniformMatrix3x2fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniformMatrix3x2fv(location, count, false, values);

void GraphicsHelperGL4::glUniformMatrix2x4fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniformMatrix2x4fv(location, count, false, values);

void GraphicsHelperGL4::glUniformMatrix4x2fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniformMatrix4x2fv(location, count, false, values);

void GraphicsHelperGL4::glUniformMatrix3x4fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniformMatrix3x4fv(location, count, false, values);

void GraphicsHelperGL4::glUniformMatrix4x3fv(GLint location, GLsizei count, const GLfloat *values)

    m_funcs->glUniformMatrix4x3fv(location, count, false, values);

UniformType GraphicsHelperGL4::uniformTypeFromGLType(GLenum type)

    switch (type) {

    case GL_FLOAT:

        return UniformType::Float;

    case GL_FLOAT_VEC2:

        return UniformType::Vec2;

    case GL_FLOAT_VEC3:

        return UniformType::Vec3;

    case GL_FLOAT_VEC4:

        return UniformType::Vec4;

    case GL_FLOAT_MAT2:

        return UniformType::Mat2;

    case GL_FLOAT_MAT3:

        return UniformType::Mat3;

    case GL_FLOAT_MAT4:

        return UniformType::Mat4;

    case GL_FLOAT_MAT2x3:

        return UniformType::Mat2x3;

    case GL_FLOAT_MAT3x2:

        return UniformType::Mat3x2;

    case GL_FLOAT_MAT2x4:

        return UniformType::Mat2x4;

    case GL_FLOAT_MAT4x2:

        return UniformType::Mat4x2;

    case GL_FLOAT_MAT3x4:

        return UniformType::Mat3x4;

    case GL_FLOAT_MAT4x3:

        return UniformType::Mat4x3;

    case GL_INT:

        return UniformType::Int;

    case GL_INT_VEC2:

        return UniformType::IVec2;

    case GL_INT_VEC3:

        return UniformType::IVec3;

    case GL_INT_VEC4:

        return UniformType::IVec4;

    case GL_UNSIGNED_INT:

        return UniformType::UInt;

    case GL_UNSIGNED_INT_VEC2:

        return UniformType::UIVec2;

    case GL_UNSIGNED_INT_VEC3:

        return UniformType::UIVec3;

    case GL_UNSIGNED_INT_VEC4:

        return UniformType::UIVec4;

    case GL_BOOL:

        return UniformType::Bool;

    case GL_BOOL_VEC2:

        return UniformType::BVec2;

    case GL_BOOL_VEC3:

        return UniformType::BVec3;

    case GL_BOOL_VEC4:

        return UniformType::BVec4;

    case GL_SAMPLER_1D:

    case GL_SAMPLER_1D_ARRAY:

    case GL_SAMPLER_1D_SHADOW:

    case GL_SAMPLER_1D_ARRAY_SHADOW:

    case GL_SAMPLER_2D:

    case GL_SAMPLER_2D_RECT:

    case GL_SAMPLER_2D_SHADOW:

    case GL_SAMPLER_2D_RECT_SHADOW:

    case GL_SAMPLER_CUBE:

    case GL_SAMPLER_CUBE_SHADOW:

    case GL_SAMPLER_CUBE_MAP_ARRAY:

    case GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW:

    case GL_SAMPLER_2D_ARRAY:

    case GL_SAMPLER_2D_ARRAY_SHADOW:

    case GL_SAMPLER_2D_MULTISAMPLE:

    case GL_SAMPLER_2D_MULTISAMPLE_ARRAY:

    case GL_SAMPLER_3D:

    case GL_SAMPLER_BUFFER:

    case GL_INT_SAMPLER_1D:

    case GL_INT_SAMPLER_2D:

    case GL_INT_SAMPLER_3D:

    case GL_INT_SAMPLER_BUFFER:

    case GL_INT_SAMPLER_2D_RECT:

    case GL_INT_SAMPLER_CUBE:

    case GL_INT_SAMPLER_CUBE_MAP_ARRAY:

    case GL_INT_SAMPLER_1D_ARRAY:

    case GL_INT_SAMPLER_2D_ARRAY:

    case GL_INT_SAMPLER_2D_MULTISAMPLE:

    case GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_1D:

    case GL_UNSIGNED_INT_SAMPLER_2D:

    case GL_UNSIGNED_INT_SAMPLER_3D:

    case GL_UNSIGNED_INT_SAMPLER_BUFFER:

    case GL_UNSIGNED_INT_SAMPLER_2D_RECT:

    case GL_UNSIGNED_INT_SAMPLER_1D_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE:

    case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_CUBE:

    case GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY:

        return UniformType::Sampler;

    case GL_IMAGE_1D:

    case GL_IMAGE_2D:

    case GL_IMAGE_3D:

    case GL_IMAGE_2D_RECT:

    case GL_IMAGE_CUBE:

    case GL_IMAGE_BUFFER:

    case GL_IMAGE_1D_ARRAY:

    case GL_IMAGE_2D_ARRAY:

    case GL_IMAGE_CUBE_MAP_ARRAY:

    case GL_IMAGE_2D_MULTISAMPLE:

    case GL_IMAGE_2D_MULTISAMPLE_ARRAY:

    case GL_INT_IMAGE_1D:

    case GL_INT_IMAGE_2D:

    case GL_INT_IMAGE_3D:

    case GL_INT_IMAGE_2D_RECT:

    case GL_INT_IMAGE_CUBE:

    case GL_INT_IMAGE_BUFFER:

    case GL_INT_IMAGE_1D_ARRAY:

    case GL_INT_IMAGE_2D_ARRAY:

    case GL_INT_IMAGE_CUBE_MAP_ARRAY:

    case GL_INT_IMAGE_2D_MULTISAMPLE:

    case GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_1D:

    case GL_UNSIGNED_INT_IMAGE_2D:

    case GL_UNSIGNED_INT_IMAGE_3D:

    case GL_UNSIGNED_INT_IMAGE_2D_RECT:

    case GL_UNSIGNED_INT_IMAGE_CUBE:

    case GL_UNSIGNED_INT_IMAGE_BUFFER:

    case GL_UNSIGNED_INT_IMAGE_1D_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE:

    case GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY:

        return UniformType::Image;

    default:

        // TO DO: Add support for Doubles and Images

        Q_UNREACHABLE_RETURN(UniformType::Float);

void GraphicsHelperGL4::blendEquation(GLenum mode)

    m_funcs->glBlendEquation(mode);

void GraphicsHelperGL4::blendFunci(GLuint buf, GLenum sfactor, GLenum dfactor)

    m_funcs->glBlendFunci(buf, sfactor, dfactor);

void GraphicsHelperGL4::blendFuncSeparatei(GLuint buf, GLenum sRGB, GLenum dRGB, GLenum sAlpha, GLenum dAlpha)

    m_funcs->glBlendFuncSeparatei(buf, sRGB, dRGB, sAlpha, dAlpha);

void GraphicsHelperGL4::alphaTest(GLenum, GLenum)

    qCWarning(Rendering) << "AlphaTest not available with OpenGL 3.2 core";

void GraphicsHelperGL4::depthTest(GLenum mode)

    m_funcs->glEnable(GL_DEPTH_TEST);

    m_funcs->glDepthFunc(mode);

void GraphicsHelperGL4::depthMask(GLenum mode)

    m_funcs->glDepthMask(mode);

void GraphicsHelperGL4::depthRange(GLdouble nearValue, GLdouble farValue)

    m_funcs->glDepthRange(nearValue, farValue);

void GraphicsHelperGL4::frontFace(GLenum mode)

    m_funcs->glFrontFace(mode);

void GraphicsHelperGL4::setMSAAEnabled(bool enabled)

    enabled ? m_funcs->glEnable(GL_MULTISAMPLE)

            : m_funcs->glDisable(GL_MULTISAMPLE);

void GraphicsHelperGL4::setAlphaCoverageEnabled(bool enabled)

    enabled ? m_funcs->glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE)

            : m_funcs->glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE);

GLuint GraphicsHelperGL4::createFrameBufferObject()

    GLuint id;

    m_funcs->glGenFramebuffers(1, &id);

    return id;

void GraphicsHelperGL4::releaseFrameBufferObject(GLuint frameBufferId)

    m_funcs->glDeleteFramebuffers(1, &frameBufferId);

void GraphicsHelperGL4::bindFrameBufferObject(GLuint frameBufferId, FBOBindMode mode)

    switch (mode) {

    case FBODraw:

        m_funcs->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, frameBufferId);

        return;

    case FBORead:

        m_funcs->glBindFramebuffer(GL_READ_FRAMEBUFFER, frameBufferId);

        return;

    case FBOReadAndDraw:

    default:

        m_funcs->glBindFramebuffer(GL_FRAMEBUFFER, frameBufferId);

        return;

void GraphicsHelperGL4::bindImageTexture(GLuint imageUnit, GLuint texture,

                                         GLint mipLevel, GLboolean layered,

                                         GLint layer, GLenum access, GLenum format)

    m_funcs->glBindImageTexture(imageUnit,

                                texture,

                                mipLevel,

                                layered,

                                layer,

                                access,

                                format);

GLuint GraphicsHelperGL4::boundFrameBufferObject()

    GLint id = 0;

    m_funcs->glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &id);

    return id;

bool GraphicsHelperGL4::checkFrameBufferComplete()

    return (m_funcs->glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);

bool GraphicsHelperGL4::frameBufferNeedsRenderBuffer(const Attachment &attachment)

    Q_UNUSED(attachment);

    return false;

void GraphicsHelperGL4::bindFrameBufferAttachment(QOpenGLTexture *texture, const Attachment &attachment)

    GLenum attr = GL_DEPTH_STENCIL_ATTACHMENT;

    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;

    texture->bind();

    QOpenGLTexture::Target target = texture->target();

    if (target == QOpenGLTexture::Target1DArray || target == QOpenGLTexture::Target2DArray ||

            target == QOpenGLTexture::Target2DMultisampleArray || target == QOpenGLTexture::Target3D)

        m_funcs->glFramebufferTextureLayer(GL_DRAW_FRAMEBUFFER, attr, texture->textureId(), attachment.m_mipLevel, attachment.m_layer);

    else if (target == QOpenGLTexture::TargetCubeMapArray && attachment.m_face != QAbstractTexture::AllFaces)

        m_funcs->glFramebufferTextureLayer( GL_DRAW_FRAMEBUFFER, attr, texture->textureId(), attachment.m_mipLevel, attachment.m_layer * 6 + (attachment.m_face - QAbstractTexture::CubeMapPositiveX));

    else 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_funcs->glFramebufferTexture(GL_DRAW_FRAMEBUFFER, attr, texture->textureId(), attachment.m_mipLevel);

    texture->release();

void GraphicsHelperGL4::bindFrameBufferAttachment(RenderBuffer *renderBuffer, const Attachment &attachment)

    Q_UNUSED(renderBuffer);

    Q_UNUSED(attachment);

    Q_UNREACHABLE();

bool GraphicsHelperGL4::supportsFeature(GraphicsHelperInterface::Feature feature) const

    switch (feature) {

    case MRT:

    case Tessellation:

    case UniformBufferObject:

    case BindableFragmentOutputs:

    case PrimitiveRestart:

    case RenderBufferDimensionRetrieval:

    case TextureDimensionRetrieval:

    case ShaderStorageObject:

    case Compute:

    case DrawBuffersBlend:

    case BlitFramebuffer:

    case IndirectDrawing:

    case MapBuffer:

    case Fences:

    case ShaderImage:

        return true;

    default:

        return false;

void GraphicsHelperGL4::drawBuffers(GLsizei n, const GLenum *bufs)

    m_funcs->glDrawBuffers(n, bufs);

void GraphicsHelperGL4::bindFragDataLocation(GLuint shader, const QHash<QString, int> &outputs)

    for (auto it = outputs.begin(), end = outputs.end(); it != end; ++it)

        m_funcs->glBindFragDataLocation(shader, it.value(), it.key().toStdString().c_str());

void GraphicsHelperGL4::bindUniformBlock(GLuint programId, GLuint uniformBlockIndex, GLuint uniformBlockBinding)

    m_funcs->glUniformBlockBinding(programId, uniformBlockIndex, uniformBlockBinding);

void GraphicsHelperGL4::bindShaderStorageBlock(GLuint programId, GLuint shaderStorageBlockIndex, GLuint shaderStorageBlockBinding)

    m_funcs->glShaderStorageBlockBinding(programId, shaderStorageBlockIndex, shaderStorageBlockBinding);

void GraphicsHelperGL4::bindBufferBase(GLenum target, GLuint index, GLuint buffer)

    m_funcs->glBindBufferBase(target, index, buffer);

void GraphicsHelperGL4::buildUniformBuffer(const QVariant &v, const ShaderUniform &description, QByteArray &buffer)

    char *bufferData = buffer.data();

    switch (description.m_type) {

    case GL_FLOAT: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 1);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 1);

        break;

    case GL_FLOAT_VEC2: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 2);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 2);

        break;

    case GL_FLOAT_VEC3: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 3);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 3);

        break;

    case GL_FLOAT_VEC4: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 4);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 4);

        break;

    case GL_FLOAT_MAT2: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 4);

        QGraphicsUtils::fillDataMatrixArray(bufferData, data, description, 2, 2);

        break;

    case GL_FLOAT_MAT2x3: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 6);

        QGraphicsUtils::fillDataMatrixArray(bufferData, data, description, 2, 3);

        break;

    case GL_FLOAT_MAT2x4: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 8);

        QGraphicsUtils::fillDataMatrixArray(bufferData, data, description, 2, 4);

        break;

    case GL_FLOAT_MAT3: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 9);

        QGraphicsUtils::fillDataMatrixArray(bufferData, data, description, 3, 3);

        break;

    case GL_FLOAT_MAT3x2: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 6);

        QGraphicsUtils::fillDataMatrixArray(bufferData, data, description, 3, 2);

        break;

    case GL_FLOAT_MAT3x4: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 12);

        QGraphicsUtils::fillDataMatrixArray(bufferData, data, description, 3, 4);

        break;

    case GL_FLOAT_MAT4: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 16);

        QGraphicsUtils::fillDataMatrixArray(bufferData, data, description, 4, 4);

        break;

    case GL_FLOAT_MAT4x2: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 8);

        QGraphicsUtils::fillDataMatrixArray(bufferData, data, description, 4, 2);

        break;

    case GL_FLOAT_MAT4x3: {

        const GLfloat *data = QGraphicsUtils::valueArrayFromVariant<GLfloat>(v, description.m_size, 12);

        QGraphicsUtils::fillDataMatrixArray(bufferData, data, description, 4, 3);

        break;

    case GL_INT: {

        const GLint *data = QGraphicsUtils::valueArrayFromVariant<GLint>(v, description.m_size, 1);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 1);

        break;

    case GL_INT_VEC2: {

        const GLint *data = QGraphicsUtils::valueArrayFromVariant<GLint>(v, description.m_size, 2);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 2);

        break;

    case GL_INT_VEC3: {

        const GLint *data = QGraphicsUtils::valueArrayFromVariant<GLint>(v, description.m_size, 3);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 3);

        break;

    case GL_INT_VEC4: {

        const GLint *data = QGraphicsUtils::valueArrayFromVariant<GLint>(v, description.m_size, 4);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 4);

        break;

    case GL_UNSIGNED_INT: {

        const GLuint *data = QGraphicsUtils::valueArrayFromVariant<GLuint>(v, description.m_size, 1);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 1);

        break;

    case GL_UNSIGNED_INT_VEC2: {

        const GLuint *data = QGraphicsUtils::valueArrayFromVariant<GLuint>(v, description.m_size, 2);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 2);

        break;

    case GL_UNSIGNED_INT_VEC3: {

        const GLuint *data = QGraphicsUtils::valueArrayFromVariant<GLuint>(v, description.m_size, 3);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 3);

        break;

    case GL_UNSIGNED_INT_VEC4: {

        const GLuint *data = QGraphicsUtils::valueArrayFromVariant<GLuint>(v, description.m_size, 4);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 4);

        break;

    case GL_BOOL: {

        const GLboolean *data = QGraphicsUtils::valueArrayFromVariant<GLboolean>(v, description.m_size, 1);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 1);

        break;

    case GL_BOOL_VEC2: {

        const GLboolean *data = QGraphicsUtils::valueArrayFromVariant<GLboolean>(v, description.m_size, 2);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 2);

        break;

    case GL_BOOL_VEC3: {

        const GLboolean *data = QGraphicsUtils::valueArrayFromVariant<GLboolean>(v, description.m_size, 3);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 3);

        break;

    case GL_BOOL_VEC4: {

        const GLboolean *data = QGraphicsUtils::valueArrayFromVariant<GLboolean>(v, description.m_size, 4);

        QGraphicsUtils::fillDataArray(bufferData, data, description, 4);

        break;

    case GL_SAMPLER_1D:

    case GL_SAMPLER_2D:

    case GL_SAMPLER_3D:

    case GL_SAMPLER_CUBE:

    case GL_SAMPLER_BUFFER:

    case GL_SAMPLER_2D_RECT:

    case GL_INT_SAMPLER_1D:

    case GL_INT_SAMPLER_2D:

    case GL_INT_SAMPLER_3D:

    case GL_INT_SAMPLER_CUBE:

    case GL_INT_SAMPLER_CUBE_MAP_ARRAY:

    case GL_INT_SAMPLER_BUFFER:

    case GL_INT_SAMPLER_2D_RECT:

    case GL_UNSIGNED_INT_SAMPLER_1D:

    case GL_UNSIGNED_INT_SAMPLER_2D:

    case GL_UNSIGNED_INT_SAMPLER_3D:

    case GL_UNSIGNED_INT_SAMPLER_CUBE:

    case GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_BUFFER:

    case GL_UNSIGNED_INT_SAMPLER_2D_RECT:

    case GL_SAMPLER_1D_SHADOW:

    case GL_SAMPLER_2D_SHADOW:

    case GL_SAMPLER_CUBE_SHADOW:

    case GL_SAMPLER_CUBE_MAP_ARRAY:

    case GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW:

    case GL_SAMPLER_1D_ARRAY:

    case GL_SAMPLER_2D_ARRAY:

    case GL_INT_SAMPLER_1D_ARRAY:

    case GL_INT_SAMPLER_2D_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_1D_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:

    case GL_SAMPLER_1D_ARRAY_SHADOW:

    case GL_SAMPLER_2D_ARRAY_SHADOW:

    case GL_SAMPLER_2D_RECT_SHADOW:

    case GL_SAMPLER_2D_MULTISAMPLE:

    case GL_INT_SAMPLER_2D_MULTISAMPLE:

    case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE:

    case GL_SAMPLER_2D_MULTISAMPLE_ARRAY:

    case GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:

    case GL_IMAGE_1D:

    case GL_IMAGE_2D:

    case GL_IMAGE_3D:

    case GL_IMAGE_2D_RECT:

    case GL_IMAGE_CUBE:

    case GL_IMAGE_BUFFER:

    case GL_IMAGE_1D_ARRAY:

    case GL_IMAGE_2D_ARRAY:

    case GL_IMAGE_CUBE_MAP_ARRAY:

    case GL_IMAGE_2D_MULTISAMPLE:

    case GL_IMAGE_2D_MULTISAMPLE_ARRAY:

    case GL_INT_IMAGE_1D:

    case GL_INT_IMAGE_2D:

    case GL_INT_IMAGE_3D:

    case GL_INT_IMAGE_2D_RECT:

    case GL_INT_IMAGE_CUBE:

    case GL_INT_IMAGE_BUFFER:

    case GL_INT_IMAGE_1D_ARRAY:

    case GL_INT_IMAGE_2D_ARRAY:

    case GL_INT_IMAGE_CUBE_MAP_ARRAY:

    case GL_INT_IMAGE_2D_MULTISAMPLE:

    case GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_1D:

    case GL_UNSIGNED_INT_IMAGE_2D:

    case GL_UNSIGNED_INT_IMAGE_3D:

    case GL_UNSIGNED_INT_IMAGE_2D_RECT:

    case GL_UNSIGNED_INT_IMAGE_CUBE:

    case GL_UNSIGNED_INT_IMAGE_BUFFER:

    case GL_UNSIGNED_INT_IMAGE_1D_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE:

    case GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY: {

        Q_ASSERT(description.m_size == 1);

        int value = v.toInt();

        QGraphicsUtils::fillDataArray<GLint>(bufferData, &value, description, 1);

        break;

    default:

        qWarning() << Q_FUNC_INFO << "unsupported uniform type:" << description.m_type << "for " << description.m_name;

        break;

uint GraphicsHelperGL4::uniformByteSize(const ShaderUniform &description)

    uint rawByteSize = 0;

    int arrayStride = qMax(description.m_arrayStride, 0);

    int matrixStride = qMax(description.m_matrixStride, 0);

    switch (description.m_type) {

    case GL_FLOAT_VEC2:

    case GL_INT_VEC2:

    case GL_UNSIGNED_INT_VEC2:

        rawByteSize = 8;

        break;

    case GL_FLOAT_VEC3:

    case GL_INT_VEC3:

    case GL_UNSIGNED_INT_VEC3:

        rawByteSize = 12;

        break;

    case GL_FLOAT_VEC4:

    case GL_INT_VEC4:

    case GL_UNSIGNED_INT_VEC4:

        rawByteSize = 16;

        break;

    case GL_FLOAT_MAT2:

        rawByteSize = matrixStride ? 2 * matrixStride : 16;

        break;

    case GL_FLOAT_MAT2x4:

        rawByteSize = matrixStride ? 2 * matrixStride : 32;

        break;

    case GL_FLOAT_MAT4x2:

        rawByteSize = matrixStride ? 4 * matrixStride : 32;

        break;

    case GL_FLOAT_MAT3:

        rawByteSize = matrixStride ? 3 * matrixStride : 36;

        break;

    case GL_FLOAT_MAT2x3:

        rawByteSize = matrixStride ? 2 * matrixStride : 24;

        break;

    case GL_FLOAT_MAT3x2:

        rawByteSize = matrixStride ? 3 * matrixStride : 24;

        break;

    case GL_FLOAT_MAT4:

        rawByteSize = matrixStride ? 4 * matrixStride : 64;

        break;

    case GL_FLOAT_MAT4x3:

        rawByteSize = matrixStride ? 4 * matrixStride : 48;

        break;

    case GL_FLOAT_MAT3x4:

        rawByteSize = matrixStride ? 3 * matrixStride : 48;

        break;

    case GL_BOOL:

        rawByteSize = 1;

        break;

    case GL_BOOL_VEC2:

        rawByteSize = 2;

        break;

    case GL_BOOL_VEC3:

        rawByteSize = 3;

        break;

    case GL_BOOL_VEC4:

        rawByteSize = 4;

        break;

    case GL_INT:

    case GL_FLOAT:

    case GL_UNSIGNED_INT:

    case GL_SAMPLER_1D:

    case GL_SAMPLER_2D:

    case GL_SAMPLER_3D:

    case GL_SAMPLER_CUBE:

    case GL_SAMPLER_BUFFER:

    case GL_SAMPLER_2D_RECT:

    case GL_INT_SAMPLER_1D:

    case GL_INT_SAMPLER_2D:

    case GL_INT_SAMPLER_3D:

    case GL_INT_SAMPLER_CUBE:

    case GL_INT_SAMPLER_BUFFER:

    case GL_INT_SAMPLER_2D_RECT:

    case GL_UNSIGNED_INT_SAMPLER_1D:

    case GL_UNSIGNED_INT_SAMPLER_2D:

    case GL_UNSIGNED_INT_SAMPLER_3D:

    case GL_UNSIGNED_INT_SAMPLER_CUBE:

    case GL_UNSIGNED_INT_SAMPLER_BUFFER:

    case GL_UNSIGNED_INT_SAMPLER_2D_RECT:

    case GL_SAMPLER_1D_SHADOW:

    case GL_SAMPLER_2D_SHADOW:

    case GL_SAMPLER_CUBE_SHADOW:

    case GL_SAMPLER_CUBE_MAP_ARRAY:

    case GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW:

    case GL_INT_SAMPLER_CUBE_MAP_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY:

    case GL_SAMPLER_1D_ARRAY:

    case GL_SAMPLER_2D_ARRAY:

    case GL_INT_SAMPLER_1D_ARRAY:

    case GL_INT_SAMPLER_2D_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_1D_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:

    case GL_SAMPLER_1D_ARRAY_SHADOW:

    case GL_SAMPLER_2D_ARRAY_SHADOW:

    case GL_SAMPLER_2D_RECT_SHADOW:

    case GL_SAMPLER_2D_MULTISAMPLE:

    case GL_INT_SAMPLER_2D_MULTISAMPLE:

    case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE:

    case GL_SAMPLER_2D_MULTISAMPLE_ARRAY:

    case GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:

    case GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY:

    case GL_IMAGE_1D:

    case GL_IMAGE_2D:

    case GL_IMAGE_3D:

    case GL_IMAGE_2D_RECT:

    case GL_IMAGE_CUBE:

    case GL_IMAGE_BUFFER:

    case GL_IMAGE_1D_ARRAY:

    case GL_IMAGE_2D_ARRAY:

    case GL_IMAGE_CUBE_MAP_ARRAY:

    case GL_IMAGE_2D_MULTISAMPLE:

    case GL_IMAGE_2D_MULTISAMPLE_ARRAY:

    case GL_INT_IMAGE_1D:

    case GL_INT_IMAGE_2D:

    case GL_INT_IMAGE_3D:

    case GL_INT_IMAGE_2D_RECT:

    case GL_INT_IMAGE_CUBE:

    case GL_INT_IMAGE_BUFFER:

    case GL_INT_IMAGE_1D_ARRAY:

    case GL_INT_IMAGE_2D_ARRAY:

    case GL_INT_IMAGE_CUBE_MAP_ARRAY:

    case GL_INT_IMAGE_2D_MULTISAMPLE:

    case GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_1D:

    case GL_UNSIGNED_INT_IMAGE_2D:

    case GL_UNSIGNED_INT_IMAGE_3D:

    case GL_UNSIGNED_INT_IMAGE_2D_RECT:

    case GL_UNSIGNED_INT_IMAGE_CUBE:

    case GL_UNSIGNED_INT_IMAGE_BUFFER:

    case GL_UNSIGNED_INT_IMAGE_1D_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:

    case GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE:

    case GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY:

        rawByteSize = 4;

        break;

    default: {

        qWarning() << Q_FUNC_INFO << "unable to deduce rawByteSize for uniform type:" << description.m_type << "for uniform" << description.m_name;

        break;

    return arrayStride ? rawByteSize * arrayStride : rawByteSize;

void GraphicsHelperGL4::enableClipPlane(int clipPlane)

    m_funcs->glEnable(GL_CLIP_DISTANCE0 + clipPlane);

void GraphicsHelperGL4::disableClipPlane(int clipPlane)

    m_funcs->glDisable(GL_CLIP_DISTANCE0 + clipPlane);

void GraphicsHelperGL4::setClipPlane(int, const QVector3D &, float)

    // deprecated

GLint GraphicsHelperGL4::maxClipPlaneCount()

    GLint max = 0;

    m_funcs->glGetIntegerv(GL_MAX_CLIP_DISTANCES, &max);

    return max;

void GraphicsHelperGL4::memoryBarrier(QMemoryBarrier::Operations barriers)

    m_funcs->glMemoryBarrier(memoryBarrierGL4Bitfield(barriers));

void GraphicsHelperGL4::enablePrimitiveRestart(int primitiveRestartIndex)

    m_funcs->glPrimitiveRestartIndex(primitiveRestartIndex);

    m_funcs->glEnable(GL_PRIMITIVE_RESTART);

void GraphicsHelperGL4::enableVertexAttributeArray(int location)

    m_funcs->glEnableVertexAttribArray(location);

void GraphicsHelperGL4::disablePrimitiveRestart()

    m_funcs->glDisable(GL_PRIMITIVE_RESTART);

void GraphicsHelperGL4::clearBufferf(GLint drawbuffer, const QVector4D &values)

    GLfloat vec[4] = {values[0], values[1], values[2], values[3]};

    m_funcs->glClearBufferfv(GL_COLOR, drawbuffer, vec);

void GraphicsHelperGL4::pointSize(bool programmable, GLfloat value)

    if (programmable) {

        m_funcs->glEnable(GL_PROGRAM_POINT_SIZE);

    } else {

        m_funcs->glDisable(GL_PROGRAM_POINT_SIZE);

        m_funcs->glPointSize(value);

void GraphicsHelperGL4::enablei(GLenum cap, GLuint index)

    m_funcs->glEnablei(cap, index);

void GraphicsHelperGL4::disablei(GLenum cap, GLuint index)

    m_funcs->glDisablei(cap, index);

void GraphicsHelperGL4::setSeamlessCubemap(bool enable)

    if (enable)

        m_funcs->glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);

    else

        m_funcs->glDisable(GL_TEXTURE_CUBE_MAP_SEAMLESS);

QSize GraphicsHelperGL4::getRenderBufferDimensions(GLuint renderBufferId)

    GLint width = 0;

    GLint height = 0;

    m_funcs->glBindRenderbuffer(GL_RENDERBUFFER, renderBufferId);

    m_funcs->glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &width);

    m_funcs->glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &height);

    m_funcs->glBindRenderbuffer(GL_RENDERBUFFER, 0);

    return QSize(width, height);

QSize GraphicsHelperGL4::getTextureDimensions(GLuint textureId, GLenum target, uint level)

    GLint width = 0;

    GLint height = 0;

    m_funcs->glBindTexture(target, textureId);

    m_funcs->glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);

    m_funcs->glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);

    m_funcs->glBindTexture(target, 0);

    return QSize(width, height);

void GraphicsHelperGL4::dispatchCompute(GLuint wx, GLuint wy, GLuint wz)

    m_funcs->glDispatchCompute(wx, wy, wz);

char *GraphicsHelperGL4::mapBuffer(GLenum target, GLsizeiptr size)

    return static_cast<char*>(m_funcs->glMapBufferRange(target, 0, size, GL_MAP_READ_BIT | GL_MAP_WRITE_BIT));

GLboolean GraphicsHelperGL4::unmapBuffer(GLenum target)

    return m_funcs->glUnmapBuffer(target);

void GraphicsHelperGL4::blitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter)

    m_funcs->glBlitFramebuffer(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);

} // namespace OpenGL

} // namespace Render

} // namespace Qt3DRender

QT_END_NAMESPACE

#endif // !QT_OPENGL_ES_2