void CustomFilterRenderer::draw(Platform3DObject inputTexture, const IntSize& size)
{
// FIXME: We would need something like CustomFilterRendererState that will contain the size and other parameters in the future. We should pass that to bindProgramBuffers instead of storing it.
// https://bugs.webkit.org/show_bug.cgi?id=100107
m_contextSize = size;
bindProgramAndBuffers(inputTexture);
m_context->drawElements(GraphicsContext3D::TRIANGLES, m_mesh->indicesCount(), GraphicsContext3D::UNSIGNED_SHORT, 0);
unbindVertexAttributes();
}
void FECustomFilter::drawFilterMesh(Platform3DObject inputTexture)
{
bool multisample = canUseMultisampleBuffers();
m_context->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, multisample ? m_multisampleFrameBuffer : m_frameBuffer);
m_context->viewport(0, 0, m_contextSize.width(), m_contextSize.height());
m_context->clearColor(0, 0, 0, 0);
m_context->clear(GraphicsContext3D::COLOR_BUFFER_BIT | GraphicsContext3D::DEPTH_BUFFER_BIT);
bindProgramAndBuffers(inputTexture);
m_context->drawElements(GraphicsContext3D::TRIANGLES, m_mesh->indicesCount(), GraphicsContext3D::UNSIGNED_SHORT, 0);
unbindVertexAttributes();
if (multisample)
resolveMultisampleBuffer();
}
bool FECustomFilter::applyShader()
{
Uint8ClampedArray* dstPixelArray = createUnmultipliedImageResult();
if (!dstPixelArray)
return false;
FilterEffect* in = inputEffect(0);
IntRect effectDrawingRect = requestedRegionOfInputImageData(in->absolutePaintRect());
RefPtr<Uint8ClampedArray> srcPixelArray = in->asUnmultipliedImage(effectDrawingRect);
IntSize newContextSize(effectDrawingRect.size());
bool hadContext = m_context;
if (!m_context && !initializeContext())
return false;
m_context->makeContextCurrent();
if (!hadContext || m_contextSize != newContextSize)
resizeContext(newContextSize);
#if !PLATFORM(BLACKBERRY) // BlackBerry defines its own Texture class.
// Do not draw the filter if the input image cannot fit inside a single GPU texture.
if (m_inputTexture->tiles().numTilesX() != 1 || m_inputTexture->tiles().numTilesY() != 1)
return false;
#endif
// The shader had compiler errors. We cannot draw anything.
if (!m_compiledProgram->isInitialized())
return false;
m_context->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_frameBuffer);
m_context->viewport(0, 0, newContextSize.width(), newContextSize.height());
m_context->clearColor(0, 0, 0, 0);
m_context->clear(GraphicsContext3D::COLOR_BUFFER_BIT | GraphicsContext3D::DEPTH_BUFFER_BIT);
bindProgramAndBuffers(srcPixelArray.get());
m_context->drawElements(GraphicsContext3D::TRIANGLES, m_mesh->indicesCount(), GraphicsContext3D::UNSIGNED_SHORT, 0);
unbindVertexAttributes();
ASSERT(static_cast<size_t>(newContextSize.width() * newContextSize.height() * 4) == dstPixelArray->length());
m_context->readPixels(0, 0, newContextSize.width(), newContextSize.height(), GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, dstPixelArray->data());
return true;
}
