path: root/tests/auto/runtime/base/Qt3DSRenderTestAttribBuffers.cpp

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#include "Qt3DSRenderTestAttribBuffers.h"
#include "../Qt3DSRenderTestMathUtil.h"
#include "render/Qt3DSRenderShaderProgram.h"

#include <string>

using namespace qt3ds;
using namespace qt3ds::render;

struct Vertex
{
    QT3DSVec3 positions;
};

static const char *vertShader(std::string &prog, bool binESContext)
{
    if (binESContext) {
        prog += "#version 300 es\n"
                "precision highp float;\n"
                "precision highp int;\n";
    } else {
        prog += "#version 430\n";
    }

    prog += "uniform mat4 mat_mvp;\n"
            "in vec3 attr_pos;			// Vertex pos\n"
            "in vec3 attr_col;			// Vertex col\n"
            "out vec3 color;			// output color\n"
            "void main()\n"
            "{\n"
            "	gl_Position = vec4(attr_pos, 1.0);\n"
            "   color = attr_col;\n"
            "}\n";

    return prog.c_str();
}

static const char *fragShader(std::string &prog, bool binESContext)
{
    if (binESContext) {
        prog += "#version 300 es\n"
                "precision highp float;\n"
                "precision highp int;\n";
    } else {
        prog += "#version 430\n";
    }

    prog += "in vec3 color;			// input color\n"
            "out vec4 fragColor;\n"
            "void main()\n"
            "{\n"
            "  fragColor = vec4( color, 1.0);\n"
            "}\n";

    return prog.c_str();
}

NVRenderTestAttribBuffers::NVRenderTestAttribBuffers()
{
    _curTest = 0;
    _maxColumn = 4;
}

NVRenderTestAttribBuffers::~NVRenderTestAttribBuffers()
{
}

bool NVRenderTestAttribBuffers::isSupported(NVRenderContext *context)
{
    return true;
}

////////////////////////////////
// test for functionality
////////////////////////////////

inline NVConstDataRef<QT3DSI8> toRef(const char *data)
{
    size_t len = strlen(data) + 1;
    return NVConstDataRef<QT3DSI8>((const QT3DSI8 *)data, (QT3DSU32)len);
}

bool NVRenderTestAttribBuffers::run(NVRenderContext *context, userContextData *pUserData)
{
    bool success = true;
    // conpute cell width
    _cellSize = pUserData->winWidth / _maxColumn;

    context->SetClearColor(QT3DSVec4(.0f, .0f, .0f, 1.f));
    context->Clear(NVRenderClearFlags(NVRenderClearValues::Color | NVRenderClearValues::Depth));

    success &= multiAttribBufferTest(context, pUserData);
    _curTest++;

    // cleanup
    context->SetViewport(NVRenderRect(0, 0, pUserData->winWidth, pUserData->winHeight));

    return success;
}

bool NVRenderTestAttribBuffers::multiAttribBufferTest(NVRenderContext *context,
                                                      userContextData *pUserData)
{
    static const Vertex vertexPositions[] = { { QT3DSVec3(-0.9, -0.9, 0) },
                                              { QT3DSVec3(0.9, -0.9, 0) },
                                              { QT3DSVec3(0.0, 0.9, 0) } };

    static const Vertex vertexColors[] = { { QT3DSVec3(0.0, 1.0, 0.0) },
                                           { QT3DSVec3(0.0, 0.6, 0.0) },
                                           { QT3DSVec3(0.0, 0.2, 0.0) } };

    NVScopedRefCounted<NVRenderVertexBuffer> mVertexBuffer;
    NVScopedRefCounted<NVRenderVertexBuffer> mColorBuffer;
    NVScopedRefCounted<NVRenderAttribLayout> mAttribLayout;
    NVScopedRefCounted<NVRenderInputAssembler> mInputAssembler;
    NVRenderVertexBuffer *attribBuffers[2];
    QT3DSMat44 mvp = QT3DSMat44::createIdentity();
    NvGl2DemoMatrixOrtho(&mvp, -1, 1, -1, 1, -10, 10);
    qt3ds::QT3DSVec3 color(0.0, 1.0, 0.0);

    // create shaders
    std::string vtxProg;
    std::string frgProg;
    NVRenderVertFragCompilationResult compResult = context->CompileSource(
        "NVRenderTestAttribBuffers shader", toRef(vertShader(vtxProg, isGLESContext(context))),
        toRef(fragShader(frgProg, isGLESContext(context))));
    if (!compResult.mShader) {
        return false;
    }

    unsigned int curY = 0;
    unsigned int curX = _curTest;
    if (_curTest >= _maxColumn) {
        curY = (_curTest / _maxColumn);
        curX = (_curTest % _maxColumn);
    }

    // set viewport
    context->SetViewport(NVRenderRect(curX * _cellSize, curY * _cellSize, _cellSize, _cellSize));

    // this is the layout
    NVRenderVertexBufferEntry entries[] = {
        NVRenderVertexBufferEntry("attr_pos", NVRenderComponentTypes::QT3DSF32, 3, 0, 0),
        NVRenderVertexBufferEntry("attr_col", NVRenderComponentTypes::QT3DSF32, 3, 0, 1),
    };

    // position buffer
    QT3DSU32 bufSize = 3 * sizeof(Vertex);
    NVDataRef<QT3DSU8> vertData((QT3DSU8 *)vertexPositions, bufSize);
    mVertexBuffer = context->CreateVertexBuffer(NVRenderBufferUsageType::Static, bufSize,
                                                3 * sizeof(QT3DSF32), vertData);
    if (!mVertexBuffer) {
        qWarning() << "NVRenderTestAttribBuffers: Failed to create vertex buffer";
        return false;
    }
    // color buffer
    NVDataRef<QT3DSU8> colorData((QT3DSU8 *)vertexColors, bufSize);
    mColorBuffer = context->CreateVertexBuffer(NVRenderBufferUsageType::Static, bufSize,
                                               3 * sizeof(QT3DSF32), colorData);
    if (!mColorBuffer) {
        qWarning() << "NVRenderTestAttribBuffers: Failed to create color buffer";
        return false;
    }

    attribBuffers[0] = mVertexBuffer;
    attribBuffers[1] = mColorBuffer;

    // create our attribute layout
    mAttribLayout = context->CreateAttributeLayout(toConstDataRef(entries, 2));
    // create input Assembler
    QT3DSU32 strides[2];
    QT3DSU32 offsets[2];
    strides[0] = mVertexBuffer->GetStride();
    offsets[0] = 0;
    strides[1] = mColorBuffer->GetStride();
    offsets[1] = 0;

    mInputAssembler = context->CreateInputAssembler(
        mAttribLayout, NVConstDataRef<NVRenderVertexBuffer *>(attribBuffers, 2), NULL,
        toConstDataRef(strides, 2), toConstDataRef(offsets, 2), NVRenderDrawMode::Triangles);
    if (!mInputAssembler) {
        qWarning() << "NVRenderTestAttribBuffers: Failed to create input assembler";
        return false;
    }

    // make input assembler active
    context->SetInputAssembler(mInputAssembler);
    // set program
    context->SetActiveShader(compResult.mShader);
    compResult.mShader->SetPropertyValue("mat_mvp", mvp);
    // set color
    compResult.mShader->SetPropertyValue("color", color);

    context->SetDepthTestEnabled(true);
    context->SetDepthWriteEnabled(true);

    // draw
    context->Draw(mInputAssembler->GetPrimitiveType(), 3, 0);

    context->SetActiveShader(0);
    compResult.mShader->release();

    return true;
}

////////////////////////////////
// performance test
////////////////////////////////
bool NVRenderTestAttribBuffers::runPerformance(NVRenderContext *context, userContextData *pUserData)
{
    return true;
}

////////////////////////////////
// test cleanup
////////////////////////////////
void NVRenderTestAttribBuffers::cleanup(NVRenderContext *context, userContextData *pUserData)
{
    context->SetClearColor(QT3DSVec4(0.0f, .0f, .0f, 0.f));
    // dummy
    context->SetViewport(NVRenderRect(0, 0, pUserData->winWidth, pUserData->winHeight));
}