tcu::PixelBufferAccess getMultisampleAccess(const tcu::PixelBufferAccess& original)
{
return tcu::PixelBufferAccess(original.getFormat(),
1,
original.getWidth(),
original.getHeight(),
original.getFormat().getPixelSize(),
original.getRowPitch(),
original.getDataPtr());
}
void resolveMultisampleColorBuffer (const tcu::PixelBufferAccess& dst, const MultisampleConstPixelBufferAccess& src)
{
DE_ASSERT(dst.getWidth() == src.raw().getHeight());
DE_ASSERT(dst.getHeight() == src.raw().getDepth());
float numSamplesInv = 1.0f / (float)src.getNumSamples();
for (int y = 0; y < dst.getHeight(); y++)
{
for (int x = 0; x < dst.getWidth(); x++)
{
tcu::Vec4 sum;
for (int s = 0; s < src.raw().getWidth(); s++)
sum += src.raw().getPixel(s, x, y);
dst.setPixel(sum*numSamplesInv, x, y);
}
}
}
void ShaderMetamorphicVariant::render (const tcu::PixelBufferAccess& img, const std::string& vertexSrc, const std::string& fragmentSrc)
{
TestLog& log = m_testCtx.getLog();
const glw::Functions& gl = m_context.getRenderContext().getFunctions();
// Positions, shared between shaders
const float positions[] =
{
-1.0f, 1.0f, // top-left
-1.0f, -1.0f, // bottom-left
1.0f, -1.0f, // bottom-right
1.0f, 1.0f, // top-right
};
const deUint16 indices[] =
{
0, 1, 2, // bottom-left triangle
0, 3, 2, // top-right triangle
};
glu::VertexArrayBinding posBinding = glu::va::Float("coord2d", 2, 6, 0, &positions[0]);
const glu::ShaderProgram program(m_context.getRenderContext(), glu::makeVtxFragSources(vertexSrc, fragmentSrc));
log << program;
if (!program.isOk())
throw tcu::TestError("Compile failed");
// Set uniforms expected in GraphicsFuzz generated programs
gl.useProgram(program.getProgram());
// Uniform: injectionSwitch
int uniformLoc = gl.getUniformLocation(program.getProgram(), "injectionSwitch");
if (uniformLoc != -1)
gl.uniform2f(uniformLoc, 0.0f, 1.0f);
// Uniform: resolution
uniformLoc = gl.getUniformLocation(program.getProgram(), "resolution");
if (uniformLoc != -1)
gl.uniform2f(uniformLoc, glw::GLfloat(img.getWidth()), glw::GLfloat(img.getHeight()));
// Uniform: mouse
uniformLoc = gl.getUniformLocation(program.getProgram(), "mouse");
if (uniformLoc != -1)
gl.uniform2f(uniformLoc, 0.0f, 0.0f);
// Uniform: time
uniformLoc = gl.getUniformLocation(program.getProgram(), "time");
if (uniformLoc != -1)
gl.uniform1f(uniformLoc, 0.0f);
// Render two times to check nondeterministic renderings
glu::draw(m_context.getRenderContext(), program.getProgram(), 1, &posBinding, glu::pr::Triangles(DE_LENGTH_OF_ARRAY(indices), &indices[0]));
glu::readPixels(m_context.getRenderContext(), 0, 0, img);
GLU_EXPECT_NO_ERROR(gl.getError(), "Draw");
}
GLW_APICALL void GLW_APIENTRY glReadPixels (GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid* pixels)
{
DE_UNREF(x);
DE_UNREF(y);
Context* const ctx = getCurrentContext();
const tcu::Vec4 clearColor (0.0f, 0.0f, 0.0f, 1.0f); // black
const tcu::TextureFormat transferFormat = glu::mapGLTransferFormat(format, type);
// invalid formats
if (transferFormat.order == TextureFormat::CHANNELORDER_LAST || transferFormat.type == TextureFormat::CHANNELTYPE_LAST)
{
if (ctx->lastError == GL_NO_ERROR)
ctx->lastError = GL_INVALID_ENUM;
return;
}
// unsupported formats
if (!(format == GL_RGBA && type == GL_UNSIGNED_BYTE) &&
!(format == GL_RGBA_INTEGER && type == GL_INT) &&
!(format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT) &&
!(format == GL_RGBA && type == GL_FLOAT))
{
if (ctx->lastError == GL_NO_ERROR)
ctx->lastError = GL_INVALID_ENUM;
return;
}
// invalid arguments
if (width < 0 || height < 0)
{
if (ctx->lastError == GL_NO_ERROR)
ctx->lastError = GL_INVALID_OPERATION;
return;
}
// read to buffer
if (ctx->pixelPackBufferBufferBinding)
return;
// read to use pointer
{
const int targetRowLength = (ctx->pixelPackRowLength != 0) ? (ctx->pixelPackRowLength) : (width);
const int targetSkipRows = ctx->pixelPackSkipRows;
const int targetSkipPixels = ctx->pixelPackSkipPixels;
const int infiniteHeight = targetSkipRows + height; // as much as needed
const int targetRowPitch = (ctx->pixelPackAlignment == 0) ? (targetRowLength * transferFormat.getPixelSize()) : (deAlign32(targetRowLength * transferFormat.getPixelSize(), ctx->pixelPackAlignment));
// Create access to the whole copy target
const tcu::PixelBufferAccess targetAccess (transferFormat, targetRowLength, infiniteHeight, 1, targetRowPitch, 0, pixels);
// Select (skip_pixels, skip_rows, width, height) subregion from it. Clip to horizontal boundaries
const tcu::PixelBufferAccess targetRectAccess = tcu::getSubregion(targetAccess,
de::clamp(targetSkipPixels, 0, targetAccess.getWidth()-1),
targetSkipRows,
de::clamp(width, 0, de::max(0, targetAccess.getWidth() - targetSkipPixels)),
height);
tcu::clear(targetRectAccess, clearColor);
}
}